WO2006026849A1 - Method of foam emulsions well cleanout for gas well - Google Patents
Method of foam emulsions well cleanout for gas well Download PDFInfo
- Publication number
- WO2006026849A1 WO2006026849A1 PCT/CA2005/001294 CA2005001294W WO2006026849A1 WO 2006026849 A1 WO2006026849 A1 WO 2006026849A1 CA 2005001294 W CA2005001294 W CA 2005001294W WO 2006026849 A1 WO2006026849 A1 WO 2006026849A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- compressed air
- foam
- pressure
- foaming solution
- emulsifier apparatus
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/14—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using liquids and gases, e.g. foams
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
Definitions
- the present invention relates to a method of well cleanout for a gas well, which uses a foam emulsion as the cleaning medium.
- An emulsifier apparatus having a compressed air inlet, a foaming solution inlet and a foam outlet, he compressed air inlet is connected to a source of compressed air capable of supplying compressed air to the emulsifier apparatus within a range of selected pressures.
- the foaming solution is connected to a source of foaming solution capable of supplying foaming solution to the emulsifier apparatus within a range of selected pressures.
- the foam outlet is connected to a discharge conduit supplying foam to a gas well.
- the production of foam is initiated out of the foam outlet of the emuisifier apparatus by supplying compressed air to the emuisifier apparatus through the compressed air inlet at a rate of approximately 300 to 400 c.f.m. and at pressures within a range of 175 p.s.i and 375 p.s.i. and foaming solution is supplied to the emuisifier apparatus through the foaming solution inlet at a rate of approximately 10 to 15 litres per minute and at pressures sufficient to overcome internal pressure within the emuisifier apparatus caused by the inflow of compressed air through the compressed air inlet.
- the pressure of compressed air supplied to the emuisifier apparatus through the compressed air inlet is increased with a corresponding increase in the pressure of foaming solution supplied to the foaming solution inlet until sufficient pressure is generated to force foam exiting the foam outlet along the discharge conduit and down the gas well with an average density of approximately 1 KPA per meter, while monitoring gas well pressure and varying compressed air pressure and foam density to ensure that pressure is always maintained at less than 80% of well pressure.
- FIGURE 1 is a side view in section of the emuisifier apparatus constructed in accordance with the teachings of the present invention
- FIGURE 2 is a side plan view of the emuisifier apparatus of FIGURE 1 connected to a well;
- FIGURE 3 is a perspective view in section of the mixing chamber.
- FIGURE 1 there is shown an emulsifier apparatus 12 having a compressed air inlet 14, a foaming solution inlet 16 and a foam outlet 18.
- compressed air inlet 14 is connected to a source of compressed air 20 capable of supplying compressed air to emulsifier apparatus 12 within a range of selected pressures.
- Foaming solution inlet 16 is connected to a source of foaming solution capable of supplying foaming solution to emulsifier apparatus 12 within a range of selected pressures.
- source of foaming solution 22 may comprise multiple tank 23 and 25. As depicted, tank 23 is used to hold the foaming agent and tanks 25 are used to hold water necessary for mixing on site to form the foaming solution.
- Foam outlet 18 is connected to a discharge conduit 24 supplying foam to a gas well 26.
- a bypass line 27 may be included for the compressed air, in order to provide an option of using compressed air on the gas well without foam.
- a series of control valves 29 and ball valves 31 allow the user to control the flow of compressed air, foam, and foaming solution through emulsifier apparatus 12.
- some sections of the piping are flex piping 34 and others are rigid piping 36 to improve the operation. The various sections are joined by unions 38.
- foam outlet 18 of emulsifier apparatus 12 by supplying compressed air to emulsifier apparatus 12 through compressed air inlet 14 at a rate of approximately 300 to 400 c.f.m. and at pressures within a range of 175 p.s.i and 375 p.s.i.
- foaming solution is supplied to emulsifier apparatus 12 through foaming solution inlet 16 at a rate of approximately 10 to 15 litres per minute and at pressures sufficient to overcome internal pressure within emulsifier apparatus 12 caused by the inflow of compressed air through the compressed air inlet 14.
- the pressure of compressed air supplied to emulsifier apparatus 12 through compressed air inlet 14 is increased with a corresponding increase in the pressure of foaming solution supplied to foaming solution inlet 16. This is done until sufficient pressure is generated to force foam exiting foam outlet 18 along discharge conduit 24 and down gas well 26 with an average density of approximately 1 KPA per meter.
- the gas well pressure is monitored while this happens and the compressed air pressure and foam density are varied to ensure that pressure is always maintained at less than 80% of well pressure.
- a return tank 28 may also be included to capture the foam after being used in gas well 26.
- emulsifier apparatus 12 have a series of axially spaced mixing plates 30 having holes
- Holes 32 in adjacent mixing plates 30 are axially offset to improve emulsification.
- Plates 30 are held in a casing 40. It is also preferable that emulsifier apparatus 12 operates without the application of heat. It will be understood that the size of the holes and the number of holes plays a role in avoiding shear degradation of the foam. It has been found that a plate diameter of about 12.7 cm with approximately 60 holes having a diameter of about 1.3 cm each is sufficient for the pressures being used to avoid shear degradation.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/683,395 US7278488B2 (en) | 2004-09-10 | 2007-03-07 | Method of generating stable foam for oil and gas well cleanouts |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2,481,533 | 2004-09-10 | ||
CA002481533A CA2481533C (en) | 2004-09-10 | 2004-09-10 | Method of foam emulsion well cleanout for gas well |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/683,395 Continuation US7278488B2 (en) | 2004-09-10 | 2007-03-07 | Method of generating stable foam for oil and gas well cleanouts |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006026849A1 true WO2006026849A1 (en) | 2006-03-16 |
Family
ID=36035870
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CA2005/001294 WO2006026849A1 (en) | 2004-09-10 | 2005-08-29 | Method of foam emulsions well cleanout for gas well |
Country Status (3)
Country | Link |
---|---|
US (1) | US7278488B2 (en) |
CA (1) | CA2481533C (en) |
WO (1) | WO2006026849A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2601879C1 (en) * | 2015-11-09 | 2016-11-10 | Публичное акционерное общество "Татнефть" имени В.Д. Шашина | Method of cleaning bottom-hole formation zone of injection wells after hydraulic fracturing |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8056636B1 (en) | 2008-03-03 | 2011-11-15 | LP Chemical Service LLC | Jet pump with foam generator |
US9664009B2 (en) * | 2012-04-04 | 2017-05-30 | Weatherford Technologies, LLC | Apparatuses, systems, and methods for forming in-situ gel pills to lift liquids from horizontal wells |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1248355A (en) * | 1969-03-13 | 1971-09-29 | Chevron Res | Method and apparatus for well cleanout |
US3662828A (en) * | 1970-09-11 | 1972-05-16 | Chevron Res | Through tubing well cleanout method using foam |
US4913237A (en) * | 1989-02-14 | 1990-04-03 | Amoco Corporation | Remedial treatment for coal degas wells |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2125245A (en) * | 1935-06-28 | 1938-07-26 | Texas Co | Emulsion apparatus |
US3377139A (en) * | 1963-06-21 | 1968-04-09 | Allied Chem | Apparatus for preparing low density urea-formaldehyde foams |
FR2214037B1 (en) * | 1973-01-16 | 1975-10-31 | Schlumberger Ltd | |
US4213936A (en) * | 1978-08-09 | 1980-07-22 | Robert Lodrick | Foam generating and spraying apparatus |
US4394289A (en) * | 1981-07-01 | 1983-07-19 | Brown Lamar W | Continuous foam generating system |
DE3782044T2 (en) * | 1987-04-10 | 1993-03-25 | Chugoku Kayaku | MIXER. |
US5356565A (en) * | 1992-08-26 | 1994-10-18 | Marathon Oil Company | In-line foam generator for hydrocarbon recovery applications and its use |
US6086052A (en) * | 1996-12-03 | 2000-07-11 | Rowe; Carroll G. | Foam generating apparatus |
US6125761A (en) * | 1997-08-07 | 2000-10-03 | Southwest Energy Inc. | Zinc oxide inhibited emulsion explosives and method |
US6422734B1 (en) * | 1999-10-27 | 2002-07-23 | National Gypsum Properties, Llc | Static foam generating apparatus and method |
-
2004
- 2004-09-10 CA CA002481533A patent/CA2481533C/en not_active Expired - Fee Related
-
2005
- 2005-08-29 WO PCT/CA2005/001294 patent/WO2006026849A1/en not_active Application Discontinuation
-
2007
- 2007-03-07 US US11/683,395 patent/US7278488B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1248355A (en) * | 1969-03-13 | 1971-09-29 | Chevron Res | Method and apparatus for well cleanout |
US3662828A (en) * | 1970-09-11 | 1972-05-16 | Chevron Res | Through tubing well cleanout method using foam |
US4913237A (en) * | 1989-02-14 | 1990-04-03 | Amoco Corporation | Remedial treatment for coal degas wells |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2601879C1 (en) * | 2015-11-09 | 2016-11-10 | Публичное акционерное общество "Татнефть" имени В.Д. Шашина | Method of cleaning bottom-hole formation zone of injection wells after hydraulic fracturing |
Also Published As
Publication number | Publication date |
---|---|
US7278488B2 (en) | 2007-10-09 |
US20070144742A1 (en) | 2007-06-28 |
CA2481533A1 (en) | 2006-03-10 |
CA2481533C (en) | 2009-04-21 |
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