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Patente

Referenziert von

Zitiert von PatentEingetragenAusgestelltUrsprünglich Bevollmächtigter Titel
US417672311. Nov. 19774. Dez. 1979DTL, IncorporatedDiamond drill bit
US451242522. Febr. 198323. Apr. 1985Christensen, Inc.Up-drill sub for use in rotary drilling
US485478828. Aug. 19878. Aug. 1989Nikken Tool Co., Ltd.
Yoshino Seiki Inc.
Drill
US500405714. Aug. 19892. Apr. 1991Eastman Christensen CompanyDrill bit with improved steerability
US57659263. Mai 199616. Juni 1998Apparatus for routering a surface and a cutting head and tool piece therefor
US60068458. Sept. 199728. Dez. 1999Baker Hughes IncorporatedRotary drill bits for directional drilling employing tandem gage pad arrangement with reaming capability
US61128368. Sept. 19975. Sept. 2000Baker Hughes IncorporatedRotary drill bits employing tandem gage pad arrangement
US617379724. Aug. 199816. Jan. 2001Baker Hughes IncorporatedRotary drill bits for directional drilling employing movable cutters and tandem gage pad arrangement with active cutting elements and having up-drill capability
US62900072. Jan. 200118. Sept. 2001Baker Hughes IncorporatedRotary drill bits for directional drilling employing tandem gage pad arrangement with cutting elements and up-drill capability
US63218625. Aug. 199827. Nov. 2001Baker Hughes IncorporatedRotary drill bits for directional drilling employing tandem gage pad arrangement with cutting elements and up-drill capability

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