US20040065484A1 - Diamond tip point-attack bit - Google Patents

Diamond tip point-attack bit Download PDF

Info

Publication number
US20040065484A1
US20040065484A1 US10/266,149 US26614902A US2004065484A1 US 20040065484 A1 US20040065484 A1 US 20040065484A1 US 26614902 A US26614902 A US 26614902A US 2004065484 A1 US2004065484 A1 US 2004065484A1
Authority
US
United States
Prior art keywords
diamond
rotatable cutting
cutting tool
carbide substrate
section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US10/266,149
Inventor
Bruce McAlvain
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US10/266,149 priority Critical patent/US20040065484A1/en
Publication of US20040065484A1 publication Critical patent/US20040065484A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21CMINING OR QUARRYING
    • E21C35/00Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
    • E21C35/18Mining picks; Holders therefor
    • E21C35/183Mining picks; Holders therefor with inserts or layers of wear-resisting material
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21CMINING OR QUARRYING
    • E21C35/00Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
    • E21C35/18Mining picks; Holders therefor
    • E21C35/183Mining picks; Holders therefor with inserts or layers of wear-resisting material
    • E21C35/1831Fixing methods or devices

Definitions

  • the invention is directed to a rotatable cutting tool having an enlarged diamond-coated cemented carbide protective tip and a second steel body segment.
  • the design of the invention is to provide improved performance and safety characteristics. These characteristics include a longer performance cycle through increased wear and fracture resistance resulting in a more efficient continuously penetrating material removal cycle and an improvement in safety, due to a full diamond tipped carbide segment, that results in less chance for methane gas ignition and explosion.
  • the large protective carbide substrate has a high temperature and high pressure bonded diamond-coated tip covering the entire exposed carbide surface that not only results in increased wear life of the bit body but also serves to protect the lower steel shank in tougher milling conditions.
  • each rotatable cutting tool rotates about its central longitudinal axis. It is important that the tools continue to rotate because without adequate rotation a conventional tool will be locked into position and start an uneven wear pattern that leads to rapid tool degradation and ultimate tool failure. Due to the higher wear resistance of the large diamond-coated cemented carbide body segment of the present invention, if the tool fails to rotate, the uneven wear pattern shown by conventional tools is greatly diminished or not noticeable when the tool clears and resumes its rotation.
  • a common mode of failure of polycrystalline diamond compacts is the delamination of the diamond from the metal carbide substrate.
  • Different attempts have been made to find a true bond that would resist delamination under the severe conditions employed.
  • U.S. Pat. No. 5,011,515 discusses numerous attempts by previous inventors to solve the problem of delamination of the diamond layer from the carbide substrate.
  • U.S. Pat. Nos. 4,592,433 and 4,784,023 teach parallel grooving of substrates to form ridges for increased bonding.
  • U.S. Pat. No. 6,029,760 teaches the use of rounded cylindrical posts as support for diamond surfaces in rock drilling and machining wear resistant materials.
  • This invention specifically addresses the use of diamond-coated picks, usually mounted on a rotating drum, for road pavement removal and recycling and coal mining, such as for continuous and long wall mining machines.
  • a feature of this invention is the enlarged diamond tip supported by rounded radiused protuberances located near the tip of the carbide substrate. The diamond tip is fully immersed into the cutting media, thus serving to decrease the frictional forces placed on the load stress concentrations and distribute them evenly over the surface, thereby minimizing the potential for diamond delamination.
  • a method for making a fully coated diamond carbide comprises the placing within a reaction cell pre-pressed forms of diamond particles affixed to the tip of the carbide substrate and simultaneously subjecting the cell and the contents thereof to temperature and pressure conditions at which the diamond particles solidify and are permanently reaction bonded to the cemented carbide substrate.
  • the methods of making polycrystalline diamond in high temperature, high-pressure presses are well known in the art and further detailed description thereof is not considered necessary.
  • Another method of failure of previous inventions that use a small carbide, or small diamond-coated carbide tip bonded to a steel shank is braze failure at the carbide tip to steel shank junction, where the severe application forces exceed the tensile strength of the braze alloy causing bond failure of the small contact area between two dissimilar metals.
  • This invention having a diamond tipped larger and longer extended carbide portion, makes the surface area where the carbide post is brazed to the steel shank of much larger diameter than previous inventions further increasing the surface area with a partial continuously varying radius that matches the profile of the steel shank pocket where it is bonded by a medium to high impact resistant braze.
  • the larger brazed surface area ensures that the braze joint will not fail under most severe loading conditions, thus extending the life of the bit and contributing to safety by minimizing catastrophic tool failure.
  • Another method of failure is due to using diamond-coated carbide tips limited in size as compared to the size of the diamond tip of the present invention. Having only a limited size carbide or diamond-coated carbide tip results in bit failure when the steel holding the carbide or diamond-coated insert is eroded away during application, exposing the cutting insert and allowing fracture thereof followed by catastrophic failure of the bit.
  • the profile of this invention is so designed as to guide the cuttings away from the ferrous shank preventing erosion of the steel body below the diamond tip, thus significantly extending the life of the tool.
  • the present invention reduces the potential of sparking and explosion from ignition of methane gas.
  • the ignition of methane gas which is released from pockets where the gas has been trapped in the material being mined, is a safety problem.
  • the causes of ignition are believed to be due to the heat generated through friction as the bits move through the coal and rock during the mining operation or due to sparking, which may occur when the steel base portions of the bits strike rock. Since the coefficient of friction of diamond is substantially lower than that of steel, less heat is generated as the diamond tipped body of the present invention cuts through coal and rock, thus reducing the possibility of gas ignition.
  • the large protective diamond tip is preferably formed onto a unitary member of cemented carbide or other material, which provides suitable hardness and toughness characteristics.
  • cemented carbide refers to the type of material resulting when grains of carbide of the group IVB, VB, or VIB metals are pressed and sintered in the presence of a binder such as cobalt, nickel, or iron as well as alloys thereof.
  • diamond refers to polycrystalline diamond, cubic boron nitride or wurtzite boron nitride and mixtures thereof.
  • the present invention overcomes the shortcomings associated with known rotatable cutting tools and teaches the construction and operation of an insert for road construction or mining attack tools.
  • the present invention of a large fully diamond tipped cemented carbide body segment, joined to the steel shank at a specified braze area ratio, serves to channel the flow of material away from the steel shank so as to significantly reduce premature washout wear and failure, which are the most common modes of failure with all smaller diamond tipped previous inventions.
  • FIG. 1 identifies a rotatable diamond tipped mining bit constructed according to the teachings of the present invention.
  • FIG. 2 shows prior art with a bit having a typical tungsten carbide tip 1 and a steel body 2 .
  • Shown in FIG. 3 is a preferred segmented embodiment of the invention of a rotatable cutter bit having a diamond-coated cemented tungsten carbide tip 3 and a steel body 2 .
  • the carbide base 4 of the diamond-coated tip 3 is joined to the steel shank 2 at the matching recessed pocket 9 by a medium to high strength braze alloy.
  • the head portion 3 , and the shank 2 are coaxially aligned.
  • the shank 2 having at its widest diameter, an enlarged section 5 , which prevents the tool from being forced into the opening of the mounting block.
  • the rearward steel member 2 may be seen to include a generally cylindrical shank portion 6 having an annular groove 7 near the rearward end and a frusto conical portion 8 adjacent forward to the shank portion 6 .
  • the frusto conical portion 8 has a partial continuously radiused socket 9 at its forward end.
  • FIG. 4 shows the present invention diamond-coated cemented tungsten carbide tip 3 , which includes a circular diamond tipped head end portion 10 and a partial continuously varying radiused tail end carbide section 11 which is brazed into a matching partial continuously varying radiused socket 9 of the steel shank 2 .
  • FIG. 5 shows the cemented carbide substrate portion of the diamond-coated body prior to affixing the diamond.
  • the surface 12 serves as a substrate onto which the diamond is applied.
  • the diamond is applied and covers the entire rounded tip surface until it meets the widest part band 13 .
  • the nodular frusto conical retention surface contains one or more layers of rounded radiused protuberances 14 , and the frusto conical planar surface 15 that extends rearward until it meets a step in the carbide substrate at a band 13 .
  • FIG. 6 shows a longer version of a substrate of this invention.
  • the front includes a circular diamond tipped head end portion 20 and a partial continuously varying radiused tail end carbide section 11 which is brazed into a matching partial continuously varying radiused socket 9 of the steel shank 2 .
  • the diamond layer 20 is shown superimposed onto the carbide substrate.
  • FIG. 7 shows the longer carbide substrate portion of the diamond-coated tip prior to affixing the diamond.
  • the diamond is applied and covers the rounded tip surface 16 , the nodular frusto conical retention surface containing one or more layers of rounded radiused protuberances 14 , and the angular frusto conical vanes 17 leading down the side of the body until they meet the widest point 18 at band 19 .

Abstract

A rotatable point-attack bit retained for rotation in a block bore, and used for impacting, fragmenting and removing material from a mine wall. An improved elongated tool body having at the front end a diamond-coated tungsten carbide wear tip that is rotationally symmetric about its longitudinal axis and contiguous with a second section steel shank at the rear end. The two distinct parts are joined by a high impact resistant braze at ratios that prevent tool breakage.
The method of making such a diamond-coated section comprises of 1) placing within a reaction cell, the diamond powder and the carbide substrate and 2) simultaneously subjecting the cell and the contents thereof to temperature and pressure at which the diamond particles are stable and form a uniform polycrystalline diamond surface on the tip of the carbide substrate thus forming a diamond-coated insert providing both cutting edge and steel body protection for increased durability and extended cutting tool life.

Description

    REFERENCES CITED
  • U.S. Patent Documents [0001]
    3,519,309 July 1970 Engle et al. 299/86 
    4,065,185 December 1977 Elders 299/86 
    4,497,520 February 1985 Ojanen 299/86 
    4,592,433 June 1986 Dennis 175/329
    4,604,106 August 1986 Hall et al.  51/293
    4,784,023 November 1988 Dennis  175/428 X
    4,865,392 September 1989 Penkunas 299/86 
    4,911,503 March 1990 Stuffler et al. 299/79 
    5,011,515 April 1991 Frushour  51/307
    5,161,627 November 1992 Burkett 175/427
    5,837,071 November 1998 Andersson et al. 148/528
    6,029,760 February 2000 Hall 175/432
    6,051,079 April 2000 Andersson et al. 148/318
  • BACKGROUND OF THE INVENTION
  • The invention is directed to a rotatable cutting tool having an enlarged diamond-coated cemented carbide protective tip and a second steel body segment. The design of the invention is to provide improved performance and safety characteristics. These characteristics include a longer performance cycle through increased wear and fracture resistance resulting in a more efficient continuously penetrating material removal cycle and an improvement in safety, due to a full diamond tipped carbide segment, that results in less chance for methane gas ignition and explosion. The large protective carbide substrate has a high temperature and high pressure bonded diamond-coated tip covering the entire exposed carbide surface that not only results in increased wear life of the bit body but also serves to protect the lower steel shank in tougher milling conditions. [0002]
  • Examples of rotatable cutting tools are on applications with long wall miners, continuous miners, and road planers. A long wall mining machine is used for mining coal seems underground. The machine includes two rotating drums having a plurality of blocks affixed thereto. Long wall mining tools typically comprise an elongated steel body with a hard cemented carbide tip brazed into a socket contained in the forward end of the steel body. One such point attack bit is described in U.S. Pat. No. 4,065,185. Attempts to improve performance have been made by hardening the insert tips of mining attack tools by the use of diamond compacts. One such diamond compact for use in cutting, machining, drilling and like operations is disclosed in Hall et al U.S. Pat. No. 4,604,106. Mining bits incorporating diamond tips brazed onto steel inserts and subsequently brazed into steel bodies are shown in Anderson et al U.S. Pat. Nos. 5,837,071 and 6,051,079. [0003]
  • During the milling operation, the drums rotate so as to cause the rotatable cutting tools to impact the mine wall surface. The tools impact and fracture the wall surface. The surface fragments of coal chunks and powder are collected by a continuously moving conveyor belt and carried to the surface of the mine for processing. During the rotation of a drum, each rotatable cutting tool rotates about its central longitudinal axis. It is important that the tools continue to rotate because without adequate rotation a conventional tool will be locked into position and start an uneven wear pattern that leads to rapid tool degradation and ultimate tool failure. Due to the higher wear resistance of the large diamond-coated cemented carbide body segment of the present invention, if the tool fails to rotate, the uneven wear pattern shown by conventional tools is greatly diminished or not noticeable when the tool clears and resumes its rotation. [0004]
  • The steel cutting tool body includes a reduced diameter portion adjacent to the rearward end thereof. A retainer is adjacent the reduced diameter portion of the steel body. The retainer functions to retain the rotatable cutting tool within the bore of the mounting block during the milling operation. Each block contains a central bore therein. This and other resilient retainer means useful with the present invention are described in U.S. Pat. Nos. 3,519,309 and 4,201,421. [0005]
  • A common mode of failure of polycrystalline diamond compacts, is the delamination of the diamond from the metal carbide substrate. Different attempts have been made to find a true bond that would resist delamination under the severe conditions employed. U.S. Pat. No. 5,011,515 discusses numerous attempts by previous inventors to solve the problem of delamination of the diamond layer from the carbide substrate. U.S. Pat. Nos. 4,592,433 and 4,784,023 teach parallel grooving of substrates to form ridges for increased bonding. U.S. Pat. No. 6,029,760 teaches the use of rounded cylindrical posts as support for diamond surfaces in rock drilling and machining wear resistant materials. These designs actually produce higher stresses in some portions of the cutter than that exhibited in the planar interface mounted PCD to carbide. However, all of the previous patents refer to rock and oil drilling or machining of parts where the stresses are not the same as for the application of this invention. This invention specifically addresses the use of diamond-coated picks, usually mounted on a rotating drum, for road pavement removal and recycling and coal mining, such as for continuous and long wall mining machines. A feature of this invention is the enlarged diamond tip supported by rounded radiused protuberances located near the tip of the carbide substrate. The diamond tip is fully immersed into the cutting media, thus serving to decrease the frictional forces placed on the load stress concentrations and distribute them evenly over the surface, thereby minimizing the potential for diamond delamination. [0006]
  • Other features of this invention are provided by a method for making a fully coated diamond carbide, which method comprises the placing within a reaction cell pre-pressed forms of diamond particles affixed to the tip of the carbide substrate and simultaneously subjecting the cell and the contents thereof to temperature and pressure conditions at which the diamond particles solidify and are permanently reaction bonded to the cemented carbide substrate. The methods of making polycrystalline diamond in high temperature, high-pressure presses are well known in the art and further detailed description thereof is not considered necessary. [0007]
  • Another method of failure of previous inventions that use a small carbide, or small diamond-coated carbide tip bonded to a steel shank is braze failure at the carbide tip to steel shank junction, where the severe application forces exceed the tensile strength of the braze alloy causing bond failure of the small contact area between two dissimilar metals. This invention, having a diamond tipped larger and longer extended carbide portion, makes the surface area where the carbide post is brazed to the steel shank of much larger diameter than previous inventions further increasing the surface area with a partial continuously varying radius that matches the profile of the steel shank pocket where it is bonded by a medium to high impact resistant braze. The larger brazed surface area ensures that the braze joint will not fail under most severe loading conditions, thus extending the life of the bit and contributing to safety by minimizing catastrophic tool failure. [0008]
  • Another method of failure is due to using diamond-coated carbide tips limited in size as compared to the size of the diamond tip of the present invention. Having only a limited size carbide or diamond-coated carbide tip results in bit failure when the steel holding the carbide or diamond-coated insert is eroded away during application, exposing the cutting insert and allowing fracture thereof followed by catastrophic failure of the bit. In addition to the much larger protective surface area, the profile of this invention is so designed as to guide the cuttings away from the ferrous shank preventing erosion of the steel body below the diamond tip, thus significantly extending the life of the tool. [0009]
  • The present invention reduces the potential of sparking and explosion from ignition of methane gas. The ignition of methane gas, which is released from pockets where the gas has been trapped in the material being mined, is a safety problem. The causes of ignition are believed to be due to the heat generated through friction as the bits move through the coal and rock during the mining operation or due to sparking, which may occur when the steel base portions of the bits strike rock. Since the coefficient of friction of diamond is substantially lower than that of steel, less heat is generated as the diamond tipped body of the present invention cuts through coal and rock, thus reducing the possibility of gas ignition. [0010]
  • The large protective diamond tip is preferably formed onto a unitary member of cemented carbide or other material, which provides suitable hardness and toughness characteristics. The term “cemented carbide” refers to the type of material resulting when grains of carbide of the group IVB, VB, or VIB metals are pressed and sintered in the presence of a binder such as cobalt, nickel, or iron as well as alloys thereof. The term “diamond” refers to polycrystalline diamond, cubic boron nitride or wurtzite boron nitride and mixtures thereof. [0011]
  • SUMMARY OF THE INVENTION
  • The present invention overcomes the shortcomings associated with known rotatable cutting tools and teaches the construction and operation of an insert for road construction or mining attack tools. The present invention of a large fully diamond tipped cemented carbide body segment, joined to the steel shank at a specified braze area ratio, serves to channel the flow of material away from the steel shank so as to significantly reduce premature washout wear and failure, which are the most common modes of failure with all smaller diamond tipped previous inventions. [0012]
  • Since the coefficient of friction of diamond is substantially lower than that of steel, less heat is generated as the protective body of the present invention cuts through coal and rock thus increasing the safety of operation by reducing the potential of sparking and explosion from ignition.[0013]
  • DETAILED DESCRIPTION
  • Referring to the drawings more particularly by reference numbers wherein like numerals refer to like parts. FIG. 1 identifies a rotatable diamond tipped mining bit constructed according to the teachings of the present invention. FIG. 2 shows prior art with a bit having a typical [0014] tungsten carbide tip 1 and a steel body 2. Shown in FIG. 3 is a preferred segmented embodiment of the invention of a rotatable cutter bit having a diamond-coated cemented tungsten carbide tip 3 and a steel body 2. The carbide base 4 of the diamond-coated tip 3 is joined to the steel shank 2 at the matching recessed pocket 9 by a medium to high strength braze alloy. The head portion 3, and the shank 2 are coaxially aligned. The shank 2 having at its widest diameter, an enlarged section 5, which prevents the tool from being forced into the opening of the mounting block. The rearward steel member 2 may be seen to include a generally cylindrical shank portion 6 having an annular groove 7 near the rearward end and a frusto conical portion 8 adjacent forward to the shank portion 6. The frusto conical portion 8 has a partial continuously radiused socket 9 at its forward end.
  • FIG. 4 shows the present invention diamond-coated cemented [0015] tungsten carbide tip 3, which includes a circular diamond tipped head end portion 10 and a partial continuously varying radiused tail end carbide section 11 which is brazed into a matching partial continuously varying radiused socket 9 of the steel shank 2.
  • FIG. 5 shows the cemented carbide substrate portion of the diamond-coated body prior to affixing the diamond. The [0016] surface 12 serves as a substrate onto which the diamond is applied. The diamond is applied and covers the entire rounded tip surface until it meets the widest part band 13. The nodular frusto conical retention surface contains one or more layers of rounded radiused protuberances 14, and the frusto conical planar surface 15 that extends rearward until it meets a step in the carbide substrate at a band 13.
  • FIG. 6 shows a longer version of a substrate of this invention. The front includes a circular diamond tipped [0017] head end portion 20 and a partial continuously varying radiused tail end carbide section 11 which is brazed into a matching partial continuously varying radiused socket 9 of the steel shank 2. The diamond layer 20 is shown superimposed onto the carbide substrate.
  • FIG. 7 shows the longer carbide substrate portion of the diamond-coated tip prior to affixing the diamond. The diamond is applied and covers the rounded [0018] tip surface 16, the nodular frusto conical retention surface containing one or more layers of rounded radiused protuberances 14, and the angular frusto conical vanes 17 leading down the side of the body until they meet the widest point 18 at band 19.

Claims (14)

What I claim as my invention is:
1. A rotatable cutting bit for impacting, fragmenting and removing material such as asphalt, concrete, rock, and minerals, the rotatable cutting bit comprised of:
a polycrystalline diamond tip, affixed to a cemented carbide substrate by high temperature and pressure bonding, forming a diamond-coated unitary body, positioned at the forward central axis extremity of the cutter bit, having coaxially aligned, rotationally symmetric about its longitudinal axis a tip section, and a base section, having a maximum diameter at said base section, and having a flat surface or a convex protrusion or partial continuously varying radiused extension at its rearward section.
a ferrous body with a head section and elongated shank having a circular cross section, said body depending from said protective diamond-coated unitary body along a longitudinal axis, said head portion having a flat surface or concave seat or partial continuously varying radiused socket at the forward end.
2. The rotatable cutting tool of claim 1 wherein the forward section is coated with polycrystalline diamond, cubic boron nitride, wurtzite boron nitride or mixtures thereof formed by a method that comprises the placing within a reaction cell pre-pressed forms of abrasive particles affixed to the tip of the cemented carbide substrate and simultaneously subjecting the cell and the contents thereof to temperature and pressure conditions at which the diamond, cubic boron nitride or wurtzite boron nitride particles form a super hard abrasion resistant polycrystalline layer permanently sinter reaction bonded to the tip of the cemented carbide substrate.
3. The rotatable cutting tool of claim 1 wherein the forward section has a cemented carbide substrate, which at its forward end has from 1-5 staggered concentrically layered rounded radiused protuberances that serve to support the diamond layer.
4. The rotatable cutting tool of claim 1 wherein the forward end of the steel shank contains a flat surface or seat or partial continuously radiused socket defining a surface area, having an overall depth of 0.001 to 2.00 inches.
5. The rotatable cutting tool of claim 1 wherein the axially rearward section of said diamond-coated insert has a flat surface or protruding or radiused extension that generally corresponds to, and fits into the shape of the flat surface or seat or partial continuously radiused socket of said steel shank.
6. The rotatable cutting tool of claim 1 with a braze joint joining the surface area of the flat or protruding or radiused extension axially rearward section of said diamond-coated insert body to the flat surface, mating seat or radiused socket of the axially forward section of said ferrous shank by means of a medium to high impact resistant braze alloy.
7. The brazed surface areas in claim 6 of said steel shank axially forward section flat surface, seat or radiused socket and said rearward diamond-coated insert body section flat surface, protruding or radiused extension to be at a ratio of steel shank surface area to diamond-coated insert body lateral cross sectioned area of 1.0 to 6.5.
8. The rotatable cutting tool of claim 1 wherein the tip is made of a polycrystalline diamond affixed in situ to the carbide substrate by high temperature and high pressure.
9. The rotatable cutting tool of claim 1 wherein the tip is made of a polycrystalline cubic boron nitride affixed in situ to the carbide substrate by high temperature and high pressure.
10. The rotatable cutting tool of claim 1 wherein the diamond-coated insert cemented carbide substrate is made of a composition containing grains of carbide of group IVB, VB, or VIB metals pressed and sintered in the presence of a binder such as 5.0 to 18.0% cobalt, nickel, iron or alloys thereof.
11. The rotatable cutting tool of claim 1 wherein the diamond-coated insert cemented carbide substrate is made of a composition containing carbide of group IVB, VB, or VIB metals having grain sizes from 0.01 to 30 microns as measured on a sintered, polished and etched part at 100 to 1500× optical magnification.
12. The rotatable cutting tool of claim 1 wherein said diamond-coated insert protective cemented carbide substrate has an overall length of 0.01 to 3.0 inches.
13. The rotatable cutting tool of claim 1 wherein said diamond-coated insert cemented carbide substrate section has a plurality of even numbered peripherally spaced, laterally projecting surfaces or vanes extending generally longitudinally along the bit, each surface or vane being substantially triangular with a narrow leading end and a wider trailing end, and having relatively diverging sides that extend from the leading end to the trailing end, the purpose of which is to effect a positive rotation of the bit upon contact with material being impacted, fragmented or removed.
14. The rotatable cutting tool of claim 1 wherein said steel shank has a means for holding a loosely resilient retainer on the steel body that allows the cutter bit to rotate about its longitudinal axis in a mounting block.
US10/266,149 2002-10-08 2002-10-08 Diamond tip point-attack bit Abandoned US20040065484A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/266,149 US20040065484A1 (en) 2002-10-08 2002-10-08 Diamond tip point-attack bit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10/266,149 US20040065484A1 (en) 2002-10-08 2002-10-08 Diamond tip point-attack bit

Publications (1)

Publication Number Publication Date
US20040065484A1 true US20040065484A1 (en) 2004-04-08

Family

ID=32042611

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/266,149 Abandoned US20040065484A1 (en) 2002-10-08 2002-10-08 Diamond tip point-attack bit

Country Status (1)

Country Link
US (1) US20040065484A1 (en)

Cited By (100)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070290546A1 (en) * 2006-06-16 2007-12-20 Hall David R A Wear Resistant Tool
US20080036279A1 (en) * 2006-08-11 2008-02-14 Hall David R Holder for a degradation assembly
US20080036283A1 (en) * 2006-08-11 2008-02-14 Hall David R Attack Tool
US20080035383A1 (en) * 2006-08-11 2008-02-14 Hall David R Non-rotating Pick with a Pressed in Carbide Segment
US20080036274A1 (en) * 2006-08-11 2008-02-14 Hall David R Sleeve in a Degradation Assembly
US20080036276A1 (en) * 2006-08-11 2008-02-14 Hall David R Lubricated Pick
US20080036271A1 (en) * 2006-08-11 2008-02-14 Hall David R Method for Providing a Degradation Drum
US20080035387A1 (en) * 2006-08-11 2008-02-14 Hall David R Downhole Drill Bit
US20080036275A1 (en) * 2006-08-11 2008-02-14 Hall David R Retainer Sleeve in a Degradation Assembly
US7347292B1 (en) 2006-10-26 2008-03-25 Hall David R Braze material for an attack tool
US20080088172A1 (en) * 2006-08-11 2008-04-17 Hall David R Holder Assembly
US20080099250A1 (en) * 2006-10-26 2008-05-01 Hall David R Superhard Insert with an Interface
US20080115977A1 (en) * 2006-08-11 2008-05-22 Hall David R Impact Tool
US7396086B1 (en) 2007-03-15 2008-07-08 Hall David R Press-fit pick
US20080185468A1 (en) * 2006-08-11 2008-08-07 Hall David R Degradation insert with overhang
US20080197691A1 (en) * 2006-08-11 2008-08-21 Hall David R Locking fixture for a degradation assembly
US20080258536A1 (en) * 2006-08-11 2008-10-23 Hall David R High-impact Resistant Tool
US20080284235A1 (en) * 2007-05-15 2008-11-20 Hall David R Spring Loaded Pick
US20080284234A1 (en) * 2007-05-14 2008-11-20 Hall David R Pick with a Reentrant
US20080309146A1 (en) * 2006-08-11 2008-12-18 Hall David R Degradation assembly shield
US20080309149A1 (en) * 2006-08-11 2008-12-18 Hall David R Braze Thickness Control
WO2009003233A1 (en) * 2007-07-02 2009-01-08 The University Of Sydney Cutting tip and tool
US20090051211A1 (en) * 2006-10-26 2009-02-26 Hall David R Thick Pointed Superhard Material
US20090066149A1 (en) * 2007-09-07 2009-03-12 Hall David R Pick with Carbide Cap
EP2053198A1 (en) 2007-10-22 2009-04-29 Element Six (Production) (Pty) Ltd. A pick body
US20090200855A1 (en) * 2006-08-11 2009-08-13 Hall David R Manually Rotatable Tool
US20090200857A1 (en) * 2006-08-11 2009-08-13 Hall David R Manually Rotatable Tool
US20090256413A1 (en) * 2008-04-11 2009-10-15 Majagi Shivanand I Cutting bit useful for impingement of earth strata
US20090267403A1 (en) * 2006-08-11 2009-10-29 Hall David R Resilient Pick Shank
US7648210B2 (en) 2006-08-11 2010-01-19 Hall David R Pick with an interlocked bolster
US7669938B2 (en) 2006-08-11 2010-03-02 Hall David R Carbide stem press fit into a steel body of a pick
US20100054875A1 (en) * 2006-08-11 2010-03-04 Hall David R Test Fixture that Positions a Cutting Element at a Positive Rake Angle
US20100108385A1 (en) * 2007-09-06 2010-05-06 Hall David R Downhole Jack Assembly Sensor
US7722127B2 (en) 2006-08-11 2010-05-25 Schlumberger Technology Corporation Pick shank in axial tension
US7740414B2 (en) 2005-03-01 2010-06-22 Hall David R Milling apparatus for a paved surface
USD620510S1 (en) * 2006-03-23 2010-07-27 Schlumberger Technology Corporation Drill bit
US20100263939A1 (en) * 2006-10-26 2010-10-21 Hall David R High Impact Resistant Tool with an Apex Width between a First and Second Transitions
US20100264721A1 (en) * 2009-04-16 2010-10-21 Hall David R Seal with Rigid Element for Degradation Assembly
US20100275425A1 (en) * 2009-04-29 2010-11-04 Hall David R Drill Bit Cutter Pocket Restitution
US7832808B2 (en) 2007-10-30 2010-11-16 Hall David R Tool holder sleeve
US7946657B2 (en) 2006-08-11 2011-05-24 Schlumberger Technology Corporation Retention for an insert
US7950746B2 (en) 2006-06-16 2011-05-31 Schlumberger Technology Corporation Attack tool for degrading materials
US7992945B2 (en) 2006-08-11 2011-08-09 Schlumberger Technology Corporation Hollow pick shank
US7997661B2 (en) 2006-08-11 2011-08-16 Schlumberger Technology Corporation Tapered bore in a pick
US8007051B2 (en) 2006-08-11 2011-08-30 Schlumberger Technology Corporation Shank assembly
US8061457B2 (en) 2009-02-17 2011-11-22 Schlumberger Technology Corporation Chamfered pointed enhanced diamond insert
WO2012015348A1 (en) * 2010-07-30 2012-02-02 Sandvik Intellectual Property Ab Metal matrix composite mining pick and method of making
WO2012075671A1 (en) * 2010-12-06 2012-06-14 Li Shiqing High efficiency crack-resistant reduced-dusting milling cutter
WO2012079110A1 (en) * 2010-12-16 2012-06-21 Newsouth Innovations Pty Limited Cutting tip and tool
US8215420B2 (en) 2006-08-11 2012-07-10 Schlumberger Technology Corporation Thermally stable pointed diamond with increased impact resistance
US8250786B2 (en) 2010-06-30 2012-08-28 Hall David R Measuring mechanism in a bore hole of a pointed cutting element
CN102676141A (en) * 2012-04-20 2012-09-19 中国海洋石油总公司 Deformable plugging and anti-sloughing agent for drilling fluid
US8292372B2 (en) 2007-12-21 2012-10-23 Hall David R Retention for holder shank
US20120312907A1 (en) * 2009-12-18 2012-12-13 Metso Minerals (Wear Protection) Ab Bimaterial elongated insert member for a grinding roll
USD674422S1 (en) * 2007-02-12 2013-01-15 Hall David R Drill bit with a pointed cutting element and a shearing cutting element
US8360174B2 (en) 2006-03-23 2013-01-29 Schlumberger Technology Corporation Lead the bit rotary steerable tool
EP2551082A1 (en) * 2011-07-28 2013-01-30 Boundary Equipment Co. Ltd. Tool Insert
USD678368S1 (en) * 2007-02-12 2013-03-19 David R. Hall Drill bit with a pointed cutting element
US8414085B2 (en) 2006-08-11 2013-04-09 Schlumberger Technology Corporation Shank assembly with a tensioned element
US8449040B2 (en) 2006-08-11 2013-05-28 David R. Hall Shank for an attack tool
US8485609B2 (en) 2006-08-11 2013-07-16 Schlumberger Technology Corporation Impact tool
US8522897B2 (en) 2005-11-21 2013-09-03 Schlumberger Technology Corporation Lead the bit rotary steerable tool
US20130236254A1 (en) * 2010-11-29 2013-09-12 Techspace Aero S.A. Two-material one-piece cutting tool
US8540037B2 (en) 2008-04-30 2013-09-24 Schlumberger Technology Corporation Layered polycrystalline diamond
US8567532B2 (en) 2006-08-11 2013-10-29 Schlumberger Technology Corporation Cutting element attached to downhole fixed bladed bit at a positive rake angle
US8622155B2 (en) 2006-08-11 2014-01-07 Schlumberger Technology Corporation Pointed diamond working ends on a shear bit
US8646848B2 (en) 2007-12-21 2014-02-11 David R. Hall Resilient connection between a pick shank and block
US8668275B2 (en) 2011-07-06 2014-03-11 David R. Hall Pick assembly with a contiguous spinal region
US8714285B2 (en) 2006-08-11 2014-05-06 Schlumberger Technology Corporation Method for drilling with a fixed bladed bit
US9051795B2 (en) 2006-08-11 2015-06-09 Schlumberger Technology Corporation Downhole drill bit
US9068410B2 (en) 2006-10-26 2015-06-30 Schlumberger Technology Corporation Dense diamond body
US9187962B2 (en) 2011-04-26 2015-11-17 Smith International, Inc. Methods of attaching rolling cutters in fixed cutter bits using sleeve, compression spring, and/or pin(s)/ball(s)
US9194189B2 (en) 2011-09-19 2015-11-24 Baker Hughes Incorporated Methods of forming a cutting element for an earth-boring tool, a related cutting element, and an earth-boring tool including such a cutting element
US9366089B2 (en) 2006-08-11 2016-06-14 Schlumberger Technology Corporation Cutting element attached to downhole fixed bladed bit at a positive rake angle
CN105821840A (en) * 2016-04-23 2016-08-03 宗福海 Manufacturing device for L-shaped socket connection piles
CN105821841A (en) * 2016-04-23 2016-08-03 宗福海 Manufacturing device of L-shaped connection piles
CN105821856A (en) * 2016-04-23 2016-08-03 刘兰花 Pile forming machine for lock connection T-shaped piles
EP2387652A4 (en) * 2009-01-13 2016-08-17 Diamond Innovations Inc Radial tool with superhard cutting surface
CN105887853A (en) * 2016-05-25 2016-08-24 刘玉香 Lock piling wall forming device
CN105887856A (en) * 2016-05-29 2016-08-24 王晨 Method for manufacturing composite foundation by using octagonal piles and buckling piles
CN105887857A (en) * 2016-05-29 2016-08-24 王晨 Method for manufacturing composite foundation by using insertion piles
CN105887852A (en) * 2016-05-25 2016-08-24 刘玉香 Occlusion wall manufacturing device
CN105951755A (en) * 2016-05-25 2016-09-21 刘玉香 Manufacturing device for buckle connection wall
CN105951759A (en) * 2016-05-29 2016-09-21 王晨 Actuation method for manufacturing vacuum dense foundation
CN105951756A (en) * 2016-05-25 2016-09-21 刘玉香 Wall forming device for latching piling wall
CN106013103A (en) * 2016-05-29 2016-10-12 王晨 Implementation method for locking-buckling wall forming device
CN106013099A (en) * 2016-05-25 2016-10-12 刘玉香 Fastening wall manufacturing device
CN106049487A (en) * 2016-08-10 2016-10-26 李海志 V-shaped drilling and stirring machine
CN106049486A (en) * 2016-08-10 2016-10-26 李海志 Joint V-shaped drilling and stirring machine
CN106049469A (en) * 2016-05-29 2016-10-26 王晨 Implementation method for manufacturing composite foundation
CN106065620A (en) * 2016-08-10 2016-11-02 李海志 Plug together V-arrangement brill and stir machine
CN106088075A (en) * 2016-08-10 2016-11-09 李海志 Grafting V-arrangement bores and stirs machine
USD775247S1 (en) * 2015-01-22 2016-12-27 Betek Gmbh & Co. Kg Flat chisel
CN106761481A (en) * 2016-12-19 2017-05-31 西南石油大学 One kind automatically adjusts the pressure of the drill instrument
US9739097B2 (en) 2011-04-26 2017-08-22 Smith International, Inc. Polycrystalline diamond compact cutters with conic shaped end
CN107420046A (en) * 2016-05-24 2017-12-01 肯纳金属公司 Rotatable cutting tool with cutting tip and backing plate
US9915102B2 (en) 2006-08-11 2018-03-13 Schlumberger Technology Corporation Pointed working ends on a bit
USD839936S1 (en) * 2016-05-24 2019-02-05 Kennametal Inc. Cutting insert and bolster
US10363624B2 (en) 2014-04-06 2019-07-30 Diamond Innovations, Inc. Active metal braze joint with stress relieving layer
US20200255941A1 (en) * 2019-02-11 2020-08-13 Kennametal Inc. Supports for chemical vapor deposition coating applications

Cited By (155)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7740414B2 (en) 2005-03-01 2010-06-22 Hall David R Milling apparatus for a paved surface
US8522897B2 (en) 2005-11-21 2013-09-03 Schlumberger Technology Corporation Lead the bit rotary steerable tool
USD620510S1 (en) * 2006-03-23 2010-07-27 Schlumberger Technology Corporation Drill bit
US8360174B2 (en) 2006-03-23 2013-01-29 Schlumberger Technology Corporation Lead the bit rotary steerable tool
US20070290546A1 (en) * 2006-06-16 2007-12-20 Hall David R A Wear Resistant Tool
US7469972B2 (en) 2006-06-16 2008-12-30 Hall David R Wear resistant tool
US7950746B2 (en) 2006-06-16 2011-05-31 Schlumberger Technology Corporation Attack tool for degrading materials
US8534767B2 (en) 2006-08-11 2013-09-17 David R. Hall Manually rotatable tool
US8215420B2 (en) 2006-08-11 2012-07-10 Schlumberger Technology Corporation Thermally stable pointed diamond with increased impact resistance
US20080036274A1 (en) * 2006-08-11 2008-02-14 Hall David R Sleeve in a Degradation Assembly
US20080036276A1 (en) * 2006-08-11 2008-02-14 Hall David R Lubricated Pick
US20080036271A1 (en) * 2006-08-11 2008-02-14 Hall David R Method for Providing a Degradation Drum
US20080035387A1 (en) * 2006-08-11 2008-02-14 Hall David R Downhole Drill Bit
US20080036275A1 (en) * 2006-08-11 2008-02-14 Hall David R Retainer Sleeve in a Degradation Assembly
US10378288B2 (en) 2006-08-11 2019-08-13 Schlumberger Technology Corporation Downhole drill bit incorporating cutting elements of different geometries
US9915102B2 (en) 2006-08-11 2018-03-13 Schlumberger Technology Corporation Pointed working ends on a bit
US20080088172A1 (en) * 2006-08-11 2008-04-17 Hall David R Holder Assembly
US8500210B2 (en) 2006-08-11 2013-08-06 Schlumberger Technology Corporation Resilient pick shank
US20080115977A1 (en) * 2006-08-11 2008-05-22 Hall David R Impact Tool
US9366089B2 (en) 2006-08-11 2016-06-14 Schlumberger Technology Corporation Cutting element attached to downhole fixed bladed bit at a positive rake angle
US20080185468A1 (en) * 2006-08-11 2008-08-07 Hall David R Degradation insert with overhang
US7410221B2 (en) 2006-08-11 2008-08-12 Hall David R Retainer sleeve in a degradation assembly
US20080197691A1 (en) * 2006-08-11 2008-08-21 Hall David R Locking fixture for a degradation assembly
US20080258536A1 (en) * 2006-08-11 2008-10-23 Hall David R High-impact Resistant Tool
US9051795B2 (en) 2006-08-11 2015-06-09 Schlumberger Technology Corporation Downhole drill bit
US20080309146A1 (en) * 2006-08-11 2008-12-18 Hall David R Degradation assembly shield
US20080309147A1 (en) * 2006-08-11 2008-12-18 Hall David R Shield of a Degradation Assembly
US20080309149A1 (en) * 2006-08-11 2008-12-18 Hall David R Braze Thickness Control
US8714285B2 (en) 2006-08-11 2014-05-06 Schlumberger Technology Corporation Method for drilling with a fixed bladed bit
US8622155B2 (en) 2006-08-11 2014-01-07 Schlumberger Technology Corporation Pointed diamond working ends on a shear bit
US8590644B2 (en) 2006-08-11 2013-11-26 Schlumberger Technology Corporation Downhole drill bit
US8567532B2 (en) 2006-08-11 2013-10-29 Schlumberger Technology Corporation Cutting element attached to downhole fixed bladed bit at a positive rake angle
US20090200855A1 (en) * 2006-08-11 2009-08-13 Hall David R Manually Rotatable Tool
US20090200857A1 (en) * 2006-08-11 2009-08-13 Hall David R Manually Rotatable Tool
US20080036283A1 (en) * 2006-08-11 2008-02-14 Hall David R Attack Tool
US20090267403A1 (en) * 2006-08-11 2009-10-29 Hall David R Resilient Pick Shank
US20090294182A1 (en) * 2006-08-11 2009-12-03 Hall David R Degradation Assembly
US8033616B2 (en) 2006-08-11 2011-10-11 Schlumberger Technology Corporation Braze thickness control
US20080035383A1 (en) * 2006-08-11 2008-02-14 Hall David R Non-rotating Pick with a Pressed in Carbide Segment
US9708856B2 (en) 2006-08-11 2017-07-18 Smith International, Inc. Downhole drill bit
US7669674B2 (en) 2006-08-11 2010-03-02 Hall David R Degradation assembly
US7669938B2 (en) 2006-08-11 2010-03-02 Hall David R Carbide stem press fit into a steel body of a pick
US20100054875A1 (en) * 2006-08-11 2010-03-04 Hall David R Test Fixture that Positions a Cutting Element at a Positive Rake Angle
US8500209B2 (en) 2006-08-11 2013-08-06 Schlumberger Technology Corporation Manually rotatable tool
US8485609B2 (en) 2006-08-11 2013-07-16 Schlumberger Technology Corporation Impact tool
US7712693B2 (en) 2006-08-11 2010-05-11 Hall David R Degradation insert with overhang
US7717365B2 (en) 2006-08-11 2010-05-18 Hall David R Degradation insert with overhang
US7722127B2 (en) 2006-08-11 2010-05-25 Schlumberger Technology Corporation Pick shank in axial tension
US7744164B2 (en) 2006-08-11 2010-06-29 Schluimberger Technology Corporation Shield of a degradation assembly
US8454096B2 (en) 2006-08-11 2013-06-04 Schlumberger Technology Corporation High-impact resistant tool
US8453497B2 (en) 2006-08-11 2013-06-04 Schlumberger Technology Corporation Test fixture that positions a cutting element at a positive rake angle
US8449040B2 (en) 2006-08-11 2013-05-28 David R. Hall Shank for an attack tool
US8434573B2 (en) 2006-08-11 2013-05-07 Schlumberger Technology Corporation Degradation assembly
US7832809B2 (en) 2006-08-11 2010-11-16 Schlumberger Technology Corporation Degradation assembly shield
US7871133B2 (en) 2006-08-11 2011-01-18 Schlumberger Technology Corporation Locking fixture
US8414085B2 (en) 2006-08-11 2013-04-09 Schlumberger Technology Corporation Shank assembly with a tensioned element
US20080036279A1 (en) * 2006-08-11 2008-02-14 Hall David R Holder for a degradation assembly
US7946657B2 (en) 2006-08-11 2011-05-24 Schlumberger Technology Corporation Retention for an insert
US7946656B2 (en) 2006-08-11 2011-05-24 Schlumberger Technology Corporation Retention system
US8118371B2 (en) 2006-08-11 2012-02-21 Schlumberger Technology Corporation Resilient pick shank
US7963617B2 (en) 2006-08-11 2011-06-21 Schlumberger Technology Corporation Degradation assembly
US7992944B2 (en) 2006-08-11 2011-08-09 Schlumberger Technology Corporation Manually rotatable tool
US7992945B2 (en) 2006-08-11 2011-08-09 Schlumberger Technology Corporation Hollow pick shank
US7997661B2 (en) 2006-08-11 2011-08-16 Schlumberger Technology Corporation Tapered bore in a pick
US8007051B2 (en) 2006-08-11 2011-08-30 Schlumberger Technology Corporation Shank assembly
US8007050B2 (en) 2006-08-11 2011-08-30 Schlumberger Technology Corporation Degradation assembly
US7661765B2 (en) 2006-08-11 2010-02-16 Hall David R Braze thickness control
US8029068B2 (en) 2006-08-11 2011-10-04 Schlumberger Technology Corporation Locking fixture for a degradation assembly
US7648210B2 (en) 2006-08-11 2010-01-19 Hall David R Pick with an interlocked bolster
US8201892B2 (en) 2006-08-11 2012-06-19 Hall David R Holder assembly
US8136887B2 (en) 2006-08-11 2012-03-20 Schlumberger Technology Corporation Non-rotating pick with a pressed in carbide segment
US8960337B2 (en) 2006-10-26 2015-02-24 Schlumberger Technology Corporation High impact resistant tool with an apex width between a first and second transitions
US9068410B2 (en) 2006-10-26 2015-06-30 Schlumberger Technology Corporation Dense diamond body
US7347292B1 (en) 2006-10-26 2008-03-25 Hall David R Braze material for an attack tool
US10029391B2 (en) 2006-10-26 2018-07-24 Schlumberger Technology Corporation High impact resistant tool with an apex width between a first and second transitions
US7353893B1 (en) 2006-10-26 2008-04-08 Hall David R Tool with a large volume of a superhard material
US20080099250A1 (en) * 2006-10-26 2008-05-01 Hall David R Superhard Insert with an Interface
US9540886B2 (en) 2006-10-26 2017-01-10 Schlumberger Technology Corporation Thick pointed superhard material
US7665552B2 (en) 2006-10-26 2010-02-23 Hall David R Superhard insert with an interface
US8028774B2 (en) 2006-10-26 2011-10-04 Schlumberger Technology Corporation Thick pointed superhard material
US20090051211A1 (en) * 2006-10-26 2009-02-26 Hall David R Thick Pointed Superhard Material
US20100065338A1 (en) * 2006-10-26 2010-03-18 Hall David R Thick Pointed Superhard Material
US20100263939A1 (en) * 2006-10-26 2010-10-21 Hall David R High Impact Resistant Tool with an Apex Width between a First and Second Transitions
US8109349B2 (en) 2006-10-26 2012-02-07 Schlumberger Technology Corporation Thick pointed superhard material
US8365845B2 (en) 2007-02-12 2013-02-05 Hall David R High impact resistant tool
USD678368S1 (en) * 2007-02-12 2013-03-19 David R. Hall Drill bit with a pointed cutting element
USD674422S1 (en) * 2007-02-12 2013-01-15 Hall David R Drill bit with a pointed cutting element and a shearing cutting element
US7396086B1 (en) 2007-03-15 2008-07-08 Hall David R Press-fit pick
US20080284234A1 (en) * 2007-05-14 2008-11-20 Hall David R Pick with a Reentrant
US7594703B2 (en) 2007-05-14 2009-09-29 Hall David R Pick with a reentrant
US7926883B2 (en) 2007-05-15 2011-04-19 Schlumberger Technology Corporation Spring loaded pick
US8342611B2 (en) 2007-05-15 2013-01-01 Schlumberger Technology Corporation Spring loaded pick
US20110080036A1 (en) * 2007-05-15 2011-04-07 Schlumberger Technology Corporation Spring Loaded Pick
US20080284235A1 (en) * 2007-05-15 2008-11-20 Hall David R Spring Loaded Pick
WO2009003233A1 (en) * 2007-07-02 2009-01-08 The University Of Sydney Cutting tip and tool
EA016278B1 (en) * 2007-07-02 2012-03-30 Дзе Юниверсити Оф Сидней Cutting tip and tool
US20100108385A1 (en) * 2007-09-06 2010-05-06 Hall David R Downhole Jack Assembly Sensor
US8499857B2 (en) 2007-09-06 2013-08-06 Schlumberger Technology Corporation Downhole jack assembly sensor
US20090066149A1 (en) * 2007-09-07 2009-03-12 Hall David R Pick with Carbide Cap
US8038223B2 (en) 2007-09-07 2011-10-18 Schlumberger Technology Corporation Pick with carbide cap
EP2053198A1 (en) 2007-10-22 2009-04-29 Element Six (Production) (Pty) Ltd. A pick body
US7832808B2 (en) 2007-10-30 2010-11-16 Hall David R Tool holder sleeve
US8292372B2 (en) 2007-12-21 2012-10-23 Hall David R Retention for holder shank
US8646848B2 (en) 2007-12-21 2014-02-11 David R. Hall Resilient connection between a pick shank and block
US20090256413A1 (en) * 2008-04-11 2009-10-15 Majagi Shivanand I Cutting bit useful for impingement of earth strata
US8540037B2 (en) 2008-04-30 2013-09-24 Schlumberger Technology Corporation Layered polycrystalline diamond
US8931854B2 (en) 2008-04-30 2015-01-13 Schlumberger Technology Corporation Layered polycrystalline diamond
EP2387652A4 (en) * 2009-01-13 2016-08-17 Diamond Innovations Inc Radial tool with superhard cutting surface
US8061457B2 (en) 2009-02-17 2011-11-22 Schlumberger Technology Corporation Chamfered pointed enhanced diamond insert
US20100264721A1 (en) * 2009-04-16 2010-10-21 Hall David R Seal with Rigid Element for Degradation Assembly
US8322796B2 (en) 2009-04-16 2012-12-04 Schlumberger Technology Corporation Seal with contact element for pick shield
US8701799B2 (en) 2009-04-29 2014-04-22 Schlumberger Technology Corporation Drill bit cutter pocket restitution
US20100275425A1 (en) * 2009-04-29 2010-11-04 Hall David R Drill Bit Cutter Pocket Restitution
US9511372B2 (en) 2009-12-18 2016-12-06 Metso Sweden Ab Bimaterial elongated insert member for a grinding roll
US20120312907A1 (en) * 2009-12-18 2012-12-13 Metso Minerals (Wear Protection) Ab Bimaterial elongated insert member for a grinding roll
US9352325B2 (en) * 2009-12-18 2016-05-31 Metso Minerals (Wear Protection) Ab Bimaterial elongated insert member for a grinding roll
US8250786B2 (en) 2010-06-30 2012-08-28 Hall David R Measuring mechanism in a bore hole of a pointed cutting element
WO2012015348A1 (en) * 2010-07-30 2012-02-02 Sandvik Intellectual Property Ab Metal matrix composite mining pick and method of making
US20130236254A1 (en) * 2010-11-29 2013-09-12 Techspace Aero S.A. Two-material one-piece cutting tool
WO2012075671A1 (en) * 2010-12-06 2012-06-14 Li Shiqing High efficiency crack-resistant reduced-dusting milling cutter
WO2012079110A1 (en) * 2010-12-16 2012-06-21 Newsouth Innovations Pty Limited Cutting tip and tool
US9187962B2 (en) 2011-04-26 2015-11-17 Smith International, Inc. Methods of attaching rolling cutters in fixed cutter bits using sleeve, compression spring, and/or pin(s)/ball(s)
US9739097B2 (en) 2011-04-26 2017-08-22 Smith International, Inc. Polycrystalline diamond compact cutters with conic shaped end
US8668275B2 (en) 2011-07-06 2014-03-11 David R. Hall Pick assembly with a contiguous spinal region
GB2494102A (en) * 2011-07-28 2013-03-06 Boundary Equipment Co Ltd A surface working tool insert
EP2551082A1 (en) * 2011-07-28 2013-01-30 Boundary Equipment Co. Ltd. Tool Insert
US9120243B2 (en) 2011-07-28 2015-09-01 Boundary Equipment Co. Ltd. Tool insert
US9771497B2 (en) 2011-09-19 2017-09-26 Baker Hughes, A Ge Company, Llc Methods of forming earth-boring tools
US9194189B2 (en) 2011-09-19 2015-11-24 Baker Hughes Incorporated Methods of forming a cutting element for an earth-boring tool, a related cutting element, and an earth-boring tool including such a cutting element
CN102676141A (en) * 2012-04-20 2012-09-19 中国海洋石油总公司 Deformable plugging and anti-sloughing agent for drilling fluid
US10363624B2 (en) 2014-04-06 2019-07-30 Diamond Innovations, Inc. Active metal braze joint with stress relieving layer
USD775247S1 (en) * 2015-01-22 2016-12-27 Betek Gmbh & Co. Kg Flat chisel
CN105821856A (en) * 2016-04-23 2016-08-03 刘兰花 Pile forming machine for lock connection T-shaped piles
CN105821840A (en) * 2016-04-23 2016-08-03 宗福海 Manufacturing device for L-shaped socket connection piles
CN105821841A (en) * 2016-04-23 2016-08-03 宗福海 Manufacturing device of L-shaped connection piles
USD839936S1 (en) * 2016-05-24 2019-02-05 Kennametal Inc. Cutting insert and bolster
US10294786B2 (en) * 2016-05-24 2019-05-21 Kennametal Inc. Rotatable cutting tool with cutting insert and bolster
CN107420046A (en) * 2016-05-24 2017-12-01 肯纳金属公司 Rotatable cutting tool with cutting tip and backing plate
AU2017202325B2 (en) * 2016-05-24 2022-02-17 Kennametal Inc. Rotatable cutting tool with cutting insert and bolster
CN105951756A (en) * 2016-05-25 2016-09-21 刘玉香 Wall forming device for latching piling wall
CN105951755A (en) * 2016-05-25 2016-09-21 刘玉香 Manufacturing device for buckle connection wall
CN105887853A (en) * 2016-05-25 2016-08-24 刘玉香 Lock piling wall forming device
CN105887852A (en) * 2016-05-25 2016-08-24 刘玉香 Occlusion wall manufacturing device
CN106013099A (en) * 2016-05-25 2016-10-12 刘玉香 Fastening wall manufacturing device
CN106049469A (en) * 2016-05-29 2016-10-26 王晨 Implementation method for manufacturing composite foundation
CN106013103A (en) * 2016-05-29 2016-10-12 王晨 Implementation method for locking-buckling wall forming device
CN105951759A (en) * 2016-05-29 2016-09-21 王晨 Actuation method for manufacturing vacuum dense foundation
CN105887857A (en) * 2016-05-29 2016-08-24 王晨 Method for manufacturing composite foundation by using insertion piles
CN105887856A (en) * 2016-05-29 2016-08-24 王晨 Method for manufacturing composite foundation by using octagonal piles and buckling piles
CN106049486A (en) * 2016-08-10 2016-10-26 李海志 Joint V-shaped drilling and stirring machine
CN106049487A (en) * 2016-08-10 2016-10-26 李海志 V-shaped drilling and stirring machine
CN106088075A (en) * 2016-08-10 2016-11-09 李海志 Grafting V-arrangement bores and stirs machine
CN106065620A (en) * 2016-08-10 2016-11-02 李海志 Plug together V-arrangement brill and stir machine
CN106761481A (en) * 2016-12-19 2017-05-31 西南石油大学 One kind automatically adjusts the pressure of the drill instrument
US20200255941A1 (en) * 2019-02-11 2020-08-13 Kennametal Inc. Supports for chemical vapor deposition coating applications

Similar Documents

Publication Publication Date Title
US20040065484A1 (en) Diamond tip point-attack bit
US20040026983A1 (en) Monolithic point-attack bit
US20030209366A1 (en) Rotatable point-attack bit with protective body
US9316061B2 (en) High impact resistant degradation element
KR101044618B1 (en) Rotatable cutting tool with reverse tapered body
US8136887B2 (en) Non-rotating pick with a pressed in carbide segment
US5161627A (en) Attack tool insert with polycrystalline diamond layer
US6733087B2 (en) Pick for disintegrating natural and man-made materials
US5078219A (en) Concave drag bit cutter device and method
US20120242136A1 (en) Cutting Tool
US20100244545A1 (en) Shearing Cutter on a Degradation Drum
US9458607B2 (en) Rotatable cutting tool with head portion having elongated projections
JP2003533618A (en) Cutting tool and its use
US8636325B2 (en) Mining and demolition tool
EP2254718B1 (en) Rotatable cutting tool with superhard cutting member
US8240404B2 (en) Roof bolt bit
US9476299B2 (en) Mining and demolition tool
US20180238170A1 (en) Asymmetric pick tool with an aspect ratio between leading and trailing edges
AU2012219742A1 (en) Self -aligning insert and degradation assembly
US20130300183A1 (en) Multi-Faced Cutting Tool
US9033424B2 (en) Wear resistant cutting tool
AU715044B2 (en) Borers
JPS6160235B2 (en)
US20210388723A1 (en) Rotary tool with thermally stable diamond

Legal Events

Date Code Title Description
STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION