WO2001018351A1 - Borehole cleaning apparatus and method - Google Patents
Borehole cleaning apparatus and method Download PDFInfo
- Publication number
- WO2001018351A1 WO2001018351A1 PCT/GB2000/003385 GB0003385W WO0118351A1 WO 2001018351 A1 WO2001018351 A1 WO 2001018351A1 GB 0003385 W GB0003385 W GB 0003385W WO 0118351 A1 WO0118351 A1 WO 0118351A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cleaning
- wall
- cleaning element
- tubular
- drive means
- 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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/02—Scrapers specially adapted therefor
-
- 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
- E21B37/02—Scrapers specially adapted therefor
- E21B37/04—Scrapers specially adapted therefor operated by fluid pressure, e.g. free-piston scrapers
Definitions
- This invention relates to an oilfield cleaning apparatus and a method for cleaning the inner wall of an oilfield tubular.
- Such apparatus can be used for cleaning casing or pipeline tubulars in the petroleum industry, either downhole or when used on the surface or subsea for the transmission of oil or gas.
- cement When running casing into a borehole in the construction of oil and gas wells, cement is commonly used to seal the casing into the hole and to seal between casings. This cement leaves scale residues in areas on the casing where it is not required, and cleaning tools must be used to remove such residues.
- oil produced from oil wells may in some cases carry high levels of wax which, as the oil cools, itself produces deposits along production flow lines. These deposits are also a form of scale which must be removed by use of cleaning tools if the oil transmission rate is to be maintained.
- water produced with the oil carries with it minerals, such as calcium and barium, which can also be deposited in layers on the inner walls of production flow lines, together with the wax, to create laminated scales which can be very difficult to remove.
- oilfield cleaning apparatus for cleaning the inner wall of an oilfield tubular, the apparatus compnsing a body to be introduced into the tubular, the body being provided with at least one cleaning element, and dnve means acting to oscillate the cleaning element in contact with the inner wall of the tubular to scrape the inner wall with the cleaning element
- Such apparatus obviates the shortcomings of the pnor art in that it provides an active cleaning action, which can be rotary, motor or turbine d ⁇ ven, utilising one or more oscillating cleaning elements
- the cleaning elements can be grouped in modules on a common dnve shaft, and the dnve shaft can be used to dnve an impeller which guides heavy debns not circulated out of the tubular to be drawn into a catcher element
- the invention also provides a method of cleaning an inner wall of an oilfield tubular, the method compnsing introducing into the tubular a body provided with at least one cleaning element so that the cleaning element contacts the inner wall of the tubular, and operating a dnve to oscillate the cleaning element to scrape the inner wall with the cleaning element
- Figure 1 is a cut-away view of a first embodiment of the invention within a borehole
- FIGS. 2 and 3 are explanatory diagrams showing details of the first embodiment
- Figure 4 shows a lower section of the first embodiment illustrating the flow paths
- Figure 5 is a side view of part of a second embodiment in accordance with the invention.
- Figure 6 is a perspective view of a detail of the second embodiment.
- Figure 7 is a perspective view of part of a third embodiment.
- Figure 1 shows a downhole cleaning tool 1 introduced into a casing 2 within a borehole for removing deposits from the inner wall 3 of the casing 2.
- the tool 1 comprises a body 4 in the form of a section of drill pipe located at the end of a pipe string to be rotated from the surface in conventional manner.
- fluid in the form of drilling mud is circulated down the pipe string in the direction of the anow 6a so as to pass along an axial passage through the body 4 and back up the annular space 6a between the body 4 and the inner wall 3 of the casing 2.
- the body 4 incorporates a hollow hub 7, and four annular cleaning units 8 are mounted on the hub 7 by means of rotary bearings 9, as will be appreciated by referring to the explanatory diagrams of Figures 2 and 3 showing the mounting of one such cleaning unit 8 from the side and in axial section respectively.
- Each cleaning unit 8 is provided with cleaning elements in the form of pads of outwardly extending bristles 10 equiangularly distributed around the circumference of the unit 8. Gaps 1 1 are provided between the pads for flow of fluid.
- Each cleaning unit 8 may have an outer surface 8a (as shown in Figure l)which is curved in the axial direction to assist contact with the inner wall 3 during the cleaning action.
- each cleaning unit 8 is mounted by its associated bearing 9 such that its central axis 12a is inclined relative to the axis of rotation 13 of the bearing 9, so as to cause the bristles 10 to be oscillated axially in contact with the inner wall 3 of the casing 2 as the hub 7 is rotated.
- the cleaning unit 8 may be offset axially (upwardly in Figure 3) from the centre line of the bearing 9 so that the bristles 10 are movable towards and away from the inner wall 3 by rotation of the hub 7.
- the cleaning unit 8 is mounted on the hub 7 by the rotary bearing 9, the fact that the bristles 10 are in engagement with the inner wall 3 during cleaning means that, as the hub 7 is rotated, the bristles 10 rotate to only a limited extent with the hub 7.
- the rotary movement of the hub 7 causes the bristles 10 to move inwardly and outwardly and upwardly and downwardly relative to the inner wall 3 to impart the required scraping action.
- the cleaning units 8 are caused to oscillate with diametrically opposite portions of the cleaning units 8 oscillating in opposite directions and conesponding portions of adjacent units 8 also oscillating in opposite directions to one another, to scour the deposits from the inner wall 3.
- fluid is circulated from within the body 4 through rotating jet nozzles 12 extending through the hub 7 at locations intermediate the cleaning units 8.
- the jets of fluid emitted by the nozzles 12 serve not only to dislodge deposits from the inner wall 3 but also to dislodge deposits attached to the bristles 10 of the cleaning units 8.
- rubber wiper cups 17 are provided in the annular space surrounding the top of the catcher tube 14, and a suction impeller screw 18 is provided on the body 4 within the top of the catcher tube 14, the impeller screw 18 being caused to rotate ith the body 4 so as to draw fluid entraining the debns into the catcher tube 14 towards a debns containment area 19 at the bottom of the catcher tube 14
- the fluid entenng the catcher tube 14 is allowed to escape by way of angle ports 20 provided in the side wall of the tube 14 and arranged so that the heavy particulate matter is retained withm the containment area 19 for later recovery to the surface
- stabiliser fins or gauge pads may be provided on the catcher tube 14 for engaging the inner wall 3 of the casing 2
- the apparatus provides an effective brushing and recovery system for the cleaning and removal of scale from casing and tubing
- the apparatus descnbed above could also be run on coiled tubing by the inclusion of a downhole motor to provide rotational dnve to the body 4
- circulating and jetting fluid would be provided by exhaust from the downhole motor.
- FIG. 5 shows a tool having a body 21 provided with a top connector 22 and a bottom connector 23 for connection to pipe sections withm a pipe stnng to which rotary motion is imparted in a manner already descnbed
- annular cleaning units 28 are mounted on a hub 27 incorporating jetting nozzles 12 m a similar manner to the cleaning units 8 already descnbed above
- the cleaning units 28 differ from the cleaning units 8, as best seen in Figure 6, in that they are provided with ngid metal studs 29 for engaging trie inner wall of the casing while being oscillated axially in use by rotation of the body 21
- both the cleaning units 8 and trie cleaning units 28 are readily detachable from the tool for replacement by new cleaning units which may be of a different type, for example of a finer or coarser brush configuration, or of the same type to the ongmal cleaning units Vanous types of cleaning unit are contemplated within the scope of the invention, and these include bnstles and studs of various densities and configurations, possibly encapsulated in a rubber matnx as descnbed in published International Application No WO 98/06927.
- the tool may incorporate one or more tractor sections 30 as shown in Figure 7 for moving the tool along the borehole
- cleaning units 8 or 28 as descnbed above may be provided in modules mounted between intermediate tractor sections to provide a tool which may be mo ⁇ ed along the borehole m a moving fluid stream obtaining its motive power from the moving fluid, the cleaning modules being provided for the removal of wax and scale in subsea pipelines, for example
- Such tractor sections may be constructed generally as described in International Application No PCT/GB00/02053, and a number of such sections may be articulated together to enable them to pass around 3D or 5D bends, dnve being provided by a common articulated dnve shaft which passes through the tool
- FIG 7 shows a tractor section 30 which may be used in such a tool
- the tractor section 30 incorporates a housing 32 provided with a turbine 34 which is inductively coupled to a shaft within the housing 32
- a number of traction units 42 are mounted on the shaft by offset rotary beanngs (not shown) in a similar manner to the mounting of the cleaning units 8 and 28 and as more particularly described with reference to Figures 4b and 4c of WO 98/06927
- Each traction unit 42 is mounted on an annular beanng having its axis of rotation inclined relative to the shaft, and furthermore the mounting of the traction unit is offset forwardly or rearwardly relative to the centre line of the beanng
- Each traction unit 42 which is made of elastomenc matenal, has five outwardly extending, equiangularly distnaded legs 50 which are prevented from rotating with the shaft by cage members 51
- the tractor section 30 is fitted withm the casing such that the legs 50 engage the inner wall of the casing so that, when the turbine 34 is rotated by moving fluid, the rotating shaft dnves the legs 50 of each traction unit 42 such that each leg in turn is biased into engagement with the casing wall and, whilst in contact with the wall, is moved in the opposite direction to the intended direction A of propulsion of the tool
- the resulting reaction force tends to propel the tool in the direction A, and each leg 50 is subsequently moved forwardly whilst out of contact with the casing wall, so that the combined effect of the swashing backwards and forwards motion of the legs 50 drives the tool continuously in the direction A.
- the direction of propulsion can be reversed by mounting the legs on the opposite side of the bearing centre line.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Cleaning In General (AREA)
- Detergent Compositions (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00956726A EP1210500B1 (en) | 1999-09-06 | 2000-09-05 | Borehole cleaning apparatus and method |
US10/070,287 US6745839B1 (en) | 1999-09-06 | 2000-09-05 | Borehole cleaning apparatus and method |
DE60015774T DE60015774D1 (en) | 1999-09-06 | 2000-09-05 | METHOD AND DEVICE FOR CLEANING A HOLE |
CA002384056A CA2384056C (en) | 1999-09-06 | 2000-09-05 | Borehole cleaning apparatus and method |
NO20020842A NO320906B1 (en) | 1999-09-06 | 2002-02-21 | Oil field cleaner and method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9920970.2 | 1999-09-06 | ||
GBGB9920970.2A GB9920970D0 (en) | 1999-09-06 | 1999-09-06 | Casing/pipeline cleaning tool |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2001018351A1 true WO2001018351A1 (en) | 2001-03-15 |
WO2001018351A8 WO2001018351A8 (en) | 2001-05-31 |
Family
ID=10860392
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB2000/003385 WO2001018351A1 (en) | 1999-09-06 | 2000-09-05 | Borehole cleaning apparatus and method |
Country Status (7)
Country | Link |
---|---|
US (1) | US6745839B1 (en) |
EP (1) | EP1210500B1 (en) |
CA (1) | CA2384056C (en) |
DE (1) | DE60015774D1 (en) |
GB (1) | GB9920970D0 (en) |
NO (1) | NO320906B1 (en) |
WO (1) | WO2001018351A1 (en) |
Cited By (12)
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WO2002042601A1 (en) * | 2000-11-24 | 2002-05-30 | Weatherford/Lamb, Inc. | Bi-directional traction apparatus |
WO2003078887A1 (en) | 2002-03-15 | 2003-09-25 | Weatherford/Lamb, Inc. | Tractors for movement along a pipeline within a fluid flow |
US6722442B2 (en) | 1996-08-15 | 2004-04-20 | Weatherford/Lamb, Inc. | Subsurface apparatus |
WO2004048841A1 (en) * | 2002-11-23 | 2004-06-10 | University Of Durham | Conduit traversing vehicle |
GB2401130A (en) * | 2003-04-30 | 2004-11-03 | Weatherford Lamb | A traction apparatus |
WO2007113477A1 (en) * | 2006-03-30 | 2007-10-11 | Specialised Petroleum Services Group Limited | Wellbore cleaning |
WO2011036244A1 (en) * | 2009-09-25 | 2011-03-31 | Welltec A/S | A brush assembly |
WO2011139837A2 (en) * | 2010-05-04 | 2011-11-10 | Baker Hughes Incorporated | Brush assembly with non-rotating stabilizer and brushes |
WO2014167315A3 (en) * | 2013-04-10 | 2015-04-23 | Field Marshall Oil And Gas Technologies Limited | Apparatus and method for cleaning a well bore tubular |
US10927625B2 (en) | 2018-05-10 | 2021-02-23 | Colorado School Of Mines | Downhole tractor for use in a wellbore |
CN113649621A (en) * | 2021-10-19 | 2021-11-16 | 南通弘旷模塑科技有限公司 | Injection mold thimble board punches and uses device |
US11959666B2 (en) | 2021-08-26 | 2024-04-16 | Colorado School Of Mines | System and method for harvesting geothermal energy from a subterranean formation |
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GB0203386D0 (en) * | 2002-02-13 | 2002-03-27 | Sps Afos Group Ltd | Wellhead seal unit |
GB0215659D0 (en) | 2002-07-06 | 2002-08-14 | Weatherford Lamb | Formed tubulars |
US7273108B2 (en) * | 2004-04-01 | 2007-09-25 | Bj Services Company | Apparatus to allow a coiled tubing tractor to traverse a horizontal wellbore |
US7624817B2 (en) | 2006-07-27 | 2009-12-01 | Putnam Samuel W | Bore hole reaming apparatus and method |
US8069916B2 (en) | 2007-01-03 | 2011-12-06 | Weatherford/Lamb, Inc. | System and methods for tubular expansion |
NO330997B1 (en) * | 2008-02-28 | 2011-09-05 | Innovar Engineering As | Device by cleaning tool |
DE102008001908A1 (en) * | 2008-05-21 | 2009-11-26 | Hilti Aktiengesellschaft | Device for borehole cleaning |
US7712520B1 (en) * | 2008-10-21 | 2010-05-11 | Weiler Corporation | Brush for a well bore casing |
US8136587B2 (en) * | 2009-04-14 | 2012-03-20 | Baker Hughes Incorporated | Slickline conveyed tubular scraper system |
US8056622B2 (en) * | 2009-04-14 | 2011-11-15 | Baker Hughes Incorporated | Slickline conveyed debris management system |
US8109331B2 (en) * | 2009-04-14 | 2012-02-07 | Baker Hughes Incorporated | Slickline conveyed debris management system |
US8360153B2 (en) * | 2009-07-29 | 2013-01-29 | Michael Brent Ford | Debris-catching attachment device and method therefor |
US8387700B2 (en) * | 2010-05-28 | 2013-03-05 | Baker Hughes Incorporated | Wellbore debris cleanout assembly and method to remove debris from a debris catcher |
US20120138369A1 (en) * | 2010-12-06 | 2012-06-07 | Smith International, Inc. | Methods to manufacture downhole tools with finished features as an integral cage |
US8312930B1 (en) | 2011-06-08 | 2012-11-20 | Hydropressure Cleaning, Inc. | Apparatus and method for water well cleaning |
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AU2018443509A1 (en) | 2018-09-28 | 2021-01-28 | Halliburton Energy Services, Inc. | Drillable casing scraper |
US11293267B2 (en) * | 2018-11-30 | 2022-04-05 | Flowco Production Solutions, LLC | Apparatuses and methods for scraping |
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USD937982S1 (en) | 2019-05-29 | 2021-12-07 | Flowco Production Solutions, LLC | Apparatus for a plunger system |
US10914137B2 (en) | 2019-06-05 | 2021-02-09 | Baker Hughes, A Ge Company, Llc | Downhole pump for wellbore cleanouts |
US11448049B2 (en) | 2019-09-05 | 2022-09-20 | Flowco Production Solutions, LLC | Gas assisted plunger lift control system and method |
US11371319B2 (en) * | 2020-03-12 | 2022-06-28 | Saudi Arabian Oil Company | Robotic pigging tool |
US11933140B2 (en) * | 2021-02-02 | 2024-03-19 | Saudi Arabian Oil Company | Well cleaning tools and related methods of cleaning wells in oil and gas applications |
US11414961B1 (en) * | 2021-02-02 | 2022-08-16 | Saudi Arabian Oil Company | Well cleaning tools and related methods of cleaning wells in oil and gas applications |
CN116220541B (en) * | 2023-05-10 | 2023-07-21 | 广东地山基础工程有限公司 | Construction device and construction method for full-casing full-rotary drilling machine in karst area |
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US2539353A (en) * | 1946-08-12 | 1951-01-23 | Ira T Minyard | Paraffin scraper stop |
US2668593A (en) * | 1950-01-14 | 1954-02-09 | Sun Oil Co | Device for scraping and testing well tubing |
FR2667519A1 (en) * | 1990-10-05 | 1992-04-10 | Inspectronic | System for passing a work assembly along the interior of a pipe or the like |
WO1998006927A1 (en) | 1996-08-15 | 1998-02-19 | Astec Developments Limited | Traction apparatus |
WO2000057100A1 (en) * | 1999-03-22 | 2000-09-28 | Aatechnology | Apparatus for propulsion in oblong cavities |
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US864544A (en) * | 1906-04-24 | 1907-08-27 | Paul Kessler | Pipe and tube cleaner. |
US1758995A (en) * | 1928-05-18 | 1930-05-20 | John C Armstrong | Tubing cleaner and protector |
US2214982A (en) * | 1938-06-16 | 1940-09-17 | Joe S Wylie | Pipe cleaner |
US3983938A (en) * | 1973-12-17 | 1976-10-05 | Hellums Terrel B | Freely slidable paraffin scraping and removing tool for cleaning oil well tubing |
US4612986A (en) * | 1984-06-04 | 1986-09-23 | Fosdick Jr Frank D | Well cleaning apparatus and treating method |
US4705107A (en) * | 1985-06-11 | 1987-11-10 | Otis Engineering Corporation | Apparatus and methods for cleaning a well |
US4747452A (en) * | 1986-09-30 | 1988-05-31 | Conoco Inc. | Wellbore cleaning device |
US5419397A (en) * | 1993-06-16 | 1995-05-30 | Well-Flow Technologies, Inc. | Well cleaning tool with scratching elements |
-
1999
- 1999-09-06 GB GBGB9920970.2A patent/GB9920970D0/en not_active Ceased
-
2000
- 2000-09-05 DE DE60015774T patent/DE60015774D1/en not_active Expired - Lifetime
- 2000-09-05 US US10/070,287 patent/US6745839B1/en not_active Expired - Lifetime
- 2000-09-05 EP EP00956726A patent/EP1210500B1/en not_active Expired - Lifetime
- 2000-09-05 WO PCT/GB2000/003385 patent/WO2001018351A1/en active IP Right Grant
- 2000-09-05 CA CA002384056A patent/CA2384056C/en not_active Expired - Fee Related
-
2002
- 2002-02-21 NO NO20020842A patent/NO320906B1/en not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US2539353A (en) * | 1946-08-12 | 1951-01-23 | Ira T Minyard | Paraffin scraper stop |
US2668593A (en) * | 1950-01-14 | 1954-02-09 | Sun Oil Co | Device for scraping and testing well tubing |
FR2667519A1 (en) * | 1990-10-05 | 1992-04-10 | Inspectronic | System for passing a work assembly along the interior of a pipe or the like |
WO1998006927A1 (en) | 1996-08-15 | 1998-02-19 | Astec Developments Limited | Traction apparatus |
WO2000057100A1 (en) * | 1999-03-22 | 2000-09-28 | Aatechnology | Apparatus for propulsion in oblong cavities |
Cited By (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6722442B2 (en) | 1996-08-15 | 2004-04-20 | Weatherford/Lamb, Inc. | Subsurface apparatus |
US6953086B2 (en) | 2000-11-24 | 2005-10-11 | Weatherford/Lamb, Inc. | Bi-directional traction apparatus |
WO2002042601A1 (en) * | 2000-11-24 | 2002-05-30 | Weatherford/Lamb, Inc. | Bi-directional traction apparatus |
WO2003078887A1 (en) | 2002-03-15 | 2003-09-25 | Weatherford/Lamb, Inc. | Tractors for movement along a pipeline within a fluid flow |
NO339704B1 (en) * | 2002-11-23 | 2017-01-23 | Genesis Oil & Gas Consultants Ltd | Vehicle for transfer in cord |
WO2004048841A1 (en) * | 2002-11-23 | 2004-06-10 | University Of Durham | Conduit traversing vehicle |
GB2410781A (en) * | 2002-11-23 | 2005-08-10 | Univ Durham | Conduit traversing vehicle |
GB2410781B (en) * | 2002-11-23 | 2006-05-03 | Univ Durham | Conduit traversing vehicle |
GB2401130A (en) * | 2003-04-30 | 2004-11-03 | Weatherford Lamb | A traction apparatus |
US7051587B2 (en) | 2003-04-30 | 2006-05-30 | Weatherford/Lamb, Inc. | Traction apparatus |
GB2401130B (en) * | 2003-04-30 | 2006-11-01 | Weatherford Lamb | A traction apparatus |
WO2007113477A1 (en) * | 2006-03-30 | 2007-10-11 | Specialised Petroleum Services Group Limited | Wellbore cleaning |
EA015554B1 (en) * | 2006-03-30 | 2011-08-30 | Спешилайзд Петролеум Сервисиз Груп Лимитед | Assembly, apparatus and method for wellbore cleaning |
US8113285B2 (en) | 2006-03-30 | 2012-02-14 | Specialised Petroleum Services Group Limited | Agitated wellbore cleaning tool and method |
EP2305948A1 (en) * | 2009-09-25 | 2011-04-06 | Welltec A/S | A brush assembly |
WO2011036244A1 (en) * | 2009-09-25 | 2011-03-31 | Welltec A/S | A brush assembly |
WO2011139837A2 (en) * | 2010-05-04 | 2011-11-10 | Baker Hughes Incorporated | Brush assembly with non-rotating stabilizer and brushes |
WO2011139837A3 (en) * | 2010-05-04 | 2011-12-29 | Baker Hughes Incorporated | Brush assembly with non-rotating stabilizer and brushes |
GB2492286A (en) * | 2010-05-04 | 2012-12-26 | Baker Hughes Inc | Brush assembly with non-rotating stabalizer and brushes |
WO2014167315A3 (en) * | 2013-04-10 | 2015-04-23 | Field Marshall Oil And Gas Technologies Limited | Apparatus and method for cleaning a well bore tubular |
US10927625B2 (en) | 2018-05-10 | 2021-02-23 | Colorado School Of Mines | Downhole tractor for use in a wellbore |
US11959666B2 (en) | 2021-08-26 | 2024-04-16 | Colorado School Of Mines | System and method for harvesting geothermal energy from a subterranean formation |
CN113649621A (en) * | 2021-10-19 | 2021-11-16 | 南通弘旷模塑科技有限公司 | Injection mold thimble board punches and uses device |
Also Published As
Publication number | Publication date |
---|---|
NO20020842L (en) | 2002-04-24 |
GB9920970D0 (en) | 1999-11-10 |
US6745839B1 (en) | 2004-06-08 |
NO20020842D0 (en) | 2002-02-21 |
NO320906B1 (en) | 2006-02-13 |
WO2001018351A8 (en) | 2001-05-31 |
CA2384056C (en) | 2005-11-15 |
EP1210500B1 (en) | 2004-11-10 |
EP1210500A1 (en) | 2002-06-05 |
DE60015774D1 (en) | 2004-12-16 |
CA2384056A1 (en) | 2001-03-15 |
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