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WO1994028280A1 - Procede de forage de plusieurs puits radiaux par orientation de plusieurs rames au fond du trou - Google Patents

Procede de forage de plusieurs puits radiaux par orientation de plusieurs rames au fond du trou Download PDF

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Publication number
WO1994028280A1
WO1994028280A1 PCT/US1993/004800 US9304800W WO9428280A1 WO 1994028280 A1 WO1994028280 A1 WO 1994028280A1 US 9304800 W US9304800 W US 9304800W WO 9428280 A1 WO9428280 A1 WO 9428280A1
Authority
WO
WIPO (PCT)
Prior art keywords
string
orientation
drill string
carrier
drilling
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.)
Ceased
Application number
PCT/US1993/004800
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English (en)
Inventor
Robert A. Gardes
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 AU43849/93A priority Critical patent/AU4384993A/en
Priority to PCT/US1993/004800 priority patent/WO1994028280A1/fr
Publication of WO1994028280A1 publication Critical patent/WO1994028280A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/02—Determining slope or direction
    • E21B47/022—Determining slope or direction of the borehole, e.g. using geomagnetism
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/04—Directional drilling
    • E21B7/06—Deflecting the direction of boreholes
    • E21B7/061—Deflecting the direction of boreholes the tool shaft advancing relative to a guide, e.g. a curved tube or a whipstock

Definitions

  • the method of the present invention relates to the drilling of radial hydrocarbon and environmental wells, with offset well bores from vertical, directional or horizontal orientation. More particularly, the present invention relates to a drill string carried within a carrier string, and the method of orienting the two strings while both strings are downhole so that the strings are oriented in the same direction for drilling multiple radial offset well bores without retrieving either string from the hole.
  • radial wells In the field of drilling for gas, oil, or other hydrocarbons, as well as environmental wells, the drilling of radial wells is known in the art. For example, when a rather large pocket of oil or gas is hit in a field, oftentimes, numerous radial well bores, which are wells drilled radially off of a vertical, horizontal, or directional hole, are drilled to maximize the recovery of the liquid or gaseous hydrocarbons from the site. Such drilling is undertaken with the use of a steerable motor assembly consisting of a mud motor assembly of several types, including an articulated motor, double bent housing, singular bent housing, or bent sub with motor, which would be attached to the bit. The type of mud motor and bent housing utilized will determine the angular configuration of the radial well.
  • a first straight, directional, or horizontal hole is drilled using conventional techniques.
  • the drill string is retrieved from the well bore, and the radial drilling process is now ready to be implemented utilizing a two-string drilling technique.
  • the first drill string is assembled with an upstock (which is a type of whipstock) which is multi-orientable without retrieving from the well bore.
  • This string would now be called the carrier string, since it has the ability to carry another drill string inside of the carrier string.
  • the carrier string is now lowered into the well bore to the site of the radial well bore point of origin.
  • the carrier string is retrieved from the hole, and then a second string, with the upstock on the end, is lowered into the first bore hole.
  • the upstock has an opening in its sidewall, to help guide yet a second, inner drill string therethrough, and begin its radial well bore.
  • the most prevalent is the need to be able to simultaneously orient both the outer and the inner drill strings so that the opening of the upstock ramp and the bent housing motor assembly are aligned. Additionally, the two strings must be oriented in the proper direction.
  • the well is drilled, the first string is retrieved, and a carrier string with a upstock is lowered into position in the original wellbore.
  • the inner string, with the bent housing motor assembly is then lowered into the carrier string, and the drilling process is ready to begin, as this assembly exits off of the upstock ramp and drills the first radial.
  • the inner string is pulled out of the hole, the upstock is retrieved, reset, and re- lowered back into the hole for the second radial. Each subsequent radial is drilled in this manner.
  • the method of the present invention solves the shortcomings in the art in a unique manner. What is provided is a method of providing a first carrier string, a drill string within the carrier string, and a method for orienting the position of the carrier string relative to the position of the inner string, so that the strings are co-oriented, without the need to retrieve either the carrier string or the inner drill string from the bore hole for drilling consecutive radial wells.
  • the method includes the steps of drilling a hole with a first drill string; retrieving the first drill string from the drilled hole; attaching a deflection tool, such as a upstock, onto the first string, which becomes known as the carrier string, and lowering it into the drilled hole; lowering a second drill string having a drill bit on its lower end through the bore of the carrier string; lowering a steering tool into the second drill string and upon activation of the steering tool, determining the high side or gyro orientation (in the event there is magnetic interference) of the bent housing on the second drill string and determining a magnetic orientation of the carrier string by artificially creating a magnetic north on the carrier string, either by use of magnets or electromagnetic means; (thus high side or gyro orientation can now be aligned with magnetic orientation and both strings are oriented in the same direction) ; and providing a magnetic orienting tool associated with the carrier string to orient the carrier string with the orientation of the second drill string so that both strings are oriented in the same direction.
  • the inner drill string now properly oriented, will then be moved forward through the upstock to drill the radial well.
  • the drilling assembly of the second drill string is retrieved back into the carrier string, the second drill string is reoriented to a second preselected orientation with the use of the steering tool, the carrier string is reoriented with the magnetic orienting method, and the second radial hole is drilled. This method is repeated until all radial holes are drilled, without having to withdraw either the drill string or the carrier string from the hole during the process.
  • the steering tools come with magnetometers, and these are used to allow the drilling assemblies to be oriented in a magnetic direction North, South, East, and West. What we are doing is creating an artificial north by use of magnets or electromagnets. This is placed in line with the opening of the upstock ramp. So when the steering tool which is in the inner drill string is lowered to a point where the magnets or electromagnets can now override the earth magnetic forces, the steering tool will now point to the new magnetically induced North which happens to be the upstock ramp opening, so that the two strings are orientated in the same direction downhole.
  • FIGURE 1 illustrates a typical drill string utilized during drilling of a non-vertical well
  • FIGURE 2 illustrates a schematic depiction of a series of radial wells being drilled from the initial non-vertical well in FIGURE 1;
  • FIGURE 3 illustrates the positioning of the carrier string including the upstock within the well casing in the process of the present invention;
  • FIGURE 4 illustrates a detail view of the upstock utilized in the process of the present invention
  • FIGURE 5 illustrates the inner drill string positioned within the carrier string in the process of the present invention
  • FIGURE 6 illustrates the steering tool positioned within the inner drill string in the process of the present invention
  • FIGURE 7A - 7D illustrates views of the positioning of the inner drill string within the carrier string in the dual orientation of the two drill strings for radial drilling; and FIGURE 8 illustrates the exiting of the inner drill string from the carrier string in order to drill the radial well.
  • FIGURE 1 there is provided a typical drilling system 10.
  • System 10 provides a drill string 12 comprised of numerous sections of drill pipe 14 threadably interconnected together at joints 16, to form what is referred to as the "drill string" 12.
  • Drill string 12 is secured to a rotary table 18 on its upper end 19, and includes a drill bit 20 on its lower end 22, which is shown drilling a bore hole 24 into the earth, as the rotary table 18 rotates the string 12.
  • Drill string 12 is secured to a rotary table 18 on its upper end 19, and includes a drill bit 20 on its lower end 22, which is shown drilling a bore hole 24 into the earth, as the rotary table 18 rotates the string 12.
  • This combination is very well known in the art, and is not novel.
  • the borehole would usually be non-vertical or even horizontal in orientation, as seen in FIGURE 1.
  • the drill string 12 would include a mud motor 30 positioned above the drill bit 20, which would rotate the bit 20 without rotating the entire drill string 14.
  • the borehole 26 would be arced as seen in FIGURE 1, and could even form a horizonal configuration. This method of drilling is very important, so as to enhance recovery and because of the high cost of recovery if the conventional methods were utilized.
  • FIGURE 2 illustrates schematically a series of radial boreholes 40 coming off of a principal borehole 26, which when done, would greatly increase the production from a particular hydrocarbon formation 42.
  • the time and money involved in such a plurality of radial wells is often prohibitive.
  • the method of the present invention reduces the time significantly, since the carrier string does not have to be removed from the borehole and reoriented after each radial is drilled, and hence results in a tremendous monetary saving to the drilling of the multiple radial wells 40.
  • the method of the present invention would provide a first conventional drill string 12, which as seen in FIGURE 3, has drilled a first horizontal borehole 26 to a predetermined depth as needed.
  • the borehole 26 may be cased or un-cased, depending on factors surrounding the drilling.
  • the drill string 12 is retrieved from the well, and the borehole 26 remains with the casing as illustrated in FIGURE 3.
  • the drill bit 20 and bent sub 32 are removed, and a means is threadably secured to the drill string 12 for allowing radial wells to be drilled from this string, now called a "carrier string" 12.
  • This means would comprise an upstock 52, as seen in FIGURE 4.
  • the upstock 52 would include an elongated body portion 54 having a bore 56 substantially therethrough.
  • a first end 58 of the upstock 52 would threadably engage onto the lowest most end of the drill string 12.
  • the second end 60 of the upstock 52 would preferably be rounded at 62 to allow it to slide down the borehole 26.
  • the upstock 52 as seen in FIGURE 4 would include a means for guiding an inner drill string 70 to drill a radial well.
  • This means would include an opening 64 in the wall 66 of the upstock 52 of sufficient space to allow an inner drill string and bit to pass therethrough.
  • a guide ramp 69 within the bore 56 of the upstock 52, so that as the bit 20 of the inner string 70 contacted the ramp 68, it would be guided along the ramp surface 67, out of the opening 64 in the wall 66 of upstock 52, and out into the earth to commence the radial borehole.
  • a means to establish a magnetic field around the string Positioned directly above the upstock 52, along the carrier string, would be a means to establish a magnetic field around the string, this means comprising what is known in the art as a Monell collar 85, as illustrated in FIGURE 5.
  • the one or more Monell collars 85 further comprise a plurality of magnets 102 or electromagnets 102, which are utilized to allow the drilling assemblies to be oriented in a magnetic direction North, South, East, and West.
  • the process of the present invention is principally addressing the drilling of radial wells which are drilled from a non-vertical, non- cased borehole.
  • the radial wells must be drilled from a vertical well which may or may not be cased.
  • Inner drill string 70 would comprise a plurality of drill pipes 14 end to end, comprising the major part of the string.
  • the inner string 70 may comprise a continuous length of coil tubing, which would be the equivalent of the plurality of sections of drill pipe 14.
  • the string is drill pipe or coil tubing
  • a certain diameter drill bit 20 at the lower end of the string 70.
  • a mud motor 80 of the type known in the art, to undertake the powering of the rotation of the drill bit.
  • These would be of the type including a bent housing mud motor, either single or double bent, and steerable mud motors . Following angle and direction, they would have the ability to slide and rotate the assembly to maintain the angle and the direction of a predetermined angular orientation depending on the angle of radial well to be drilled.
  • mule shoe sub 84 which is a component designed to receive a steering tool lowered on a wireline, which will be described further. These components are critical in orienting the inner drill string 70 and the carrier string 12, and will be described further in the process.
  • the inner drill string 70 is then lowered into the carrier string 12 which has the upstock 52 on its lower end.
  • the inner string 70 is lowered to a position such that the drill bit 20 rests in the bore of the carrier string 12, at some point above the upstock 52, as illustrated in FIGURE 5.
  • FIGURE 6 illustrates a steering tool 90, of the type for example, manufactured by DMI or Sharwell, known in the art, is lowered via a wireline 92 down the bore of inner drill string 70, as depicted in FIGURE 5, to the point of the mule shoe 84, where the steering tool 90 is locked in place within a slot 86 in the mule shoe 84.
  • the steering tool 90 With the placement of the steering tool 90 engaged into the mule shoe 84, the steering tool 90 would be activated to show the position of the "high side or gyro orientation " of the inner string 70. Once that orientation has been established, and the inner string is positioned so that the steerable motor assembly is oriented in the direction of the preselected path, the inner string is then lowered to a point where the steering tool is positioned within the magnetic field of the carrier string magnetic orienting Monell collar 102. The steering tool 90 is then switched to magnetic orientation. The Magnetometers 99 of the steering tool 90 then sense the magnetic field of the carrier string 12 and will then point to North. This artificially induced North is the orientation of the carrier string's upstock opening 64. By rotating the carrier string 12 to align North with high side or gyro, both strings will now be facing the same direction with the orientation of the inner drill string 70.
  • FIGURES 7A through 7D The steps in this process are illustrated in FIGURES 7A through 7D.
  • the carrier string 12 has been positioned within the borehole with the upstock 52 at its lower end, and with the opening 64 in the wall of upstock 52 in no particular orientation at this point in the process.
  • the magnets 102 positioned in the wall of the Monell collars 85, in the carrier string 12, also illustrated in FIGURE 3.
  • FIGURE 7B the inner drill string 70, includes the bit 20, and the mule shoe 84, having the slot 86 to accommodate the steering tool 90. This string 70 has been lowered to a certain position within carrier string 12.
  • the steering tool 90 is then locked into slot 86, and one is then ready to select the "high side or gyro orientation" of the inner drill string 70.
  • the steering tool 90 includes magnetometers which, when activated, sense the magnetic field of the magnets 102 in carrier string 12. After the steering tool 90 is activated, it senses a straight up high side or gyro orientation as seen in FIGURE 7B.
  • FIGURE 7C illustrates that it has been determined that a radial wellbore will be drilled 30 degrees to the right of high side or gyro.
  • the inner drill string 70 is illustrated as rotated to 30 degrees right of high side or gyro by arrow 87.
  • the steering tool 90 carried by the inner string 12 is then activated for magnetic orientation.
  • the magnetometers 99 of steering tool 90 once activated, will point to North or an artificially induced North, created by magnets 102 of Monell collars 85.
  • the magnetometers 99 of the steering tool 90 will sense the magnets 102 located on the Monell drill collar 85 as shown by the phantom lines 103 of FIGURE 7C as the Magnetic North orientation.
  • the carrier string 12 can then be rotated in the direction of arrow 89 to align the magnets 102 with the orientation of the magnetometers 99 of steering tool 90. Therefore, as seen in FIGURE 7D, the two strings are aligned precisely in the same orientation, so that the inner string 70 may be then allowed to drill through the opening 64 in the upstock 52 in the preselected 30 degree orientation.
  • the carrier string 12 is rotated so that the magnetometers 99 sense the artificially induced North orientation as Magnetic North, and the two strings are again aligned for the drilling of the second radial. This process can be repeated indefinitely, and a plurality of radial holes can be drilled without ever returning either of the strings to the surface.
  • drilling system 10 drill or carrier string 12 drill pipe 14 joints 16 rotary table 18 upper end 19 drill bit 20 lower end 22 bore hole 24 non-vertical borehole 26 mud motor 30 bent sub 32 radial boreholes 40 hydrocarbon formation 42 casing 48 wall 50 upstock 52 body portion 54 bore 56 first end 58 second end 60 rounded portion 62 opening 64 wall 66 guide ramp 68 ramp surface 69 inner drill string 70 mud motor 80 bent sub 82 mule shoe sub 84 Monell collar 85 slot 86 arrow 87 steering tool 90 wireline 92 magnetometers 99 magnetic field 101 magnets 102 phantom line 103

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  • 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)
  • Geophysics (AREA)
  • Earth Drilling (AREA)

Abstract

Procédé de forage de trous de forage radiaux (40) à partir d'un premier trou de forage (24) sans sortir la rame de sondage du trou, selon lequel on utilise une première rame porteuse (22), une rame de sondage (70) située dans la rame porteuse, et un procédé d'orientation de la position de la rame porteuse (12) par rapport à la position de la rame interne (70) qui permet aux rames d'être co-orientées sans qu'il soit nécessaire de récupérer la rame porteuse (12) ou la rame interne (70) dans le trou de forage (24) pour forer d'autres puits radiaux (40).
PCT/US1993/004800 1993-05-21 1993-05-21 Procede de forage de plusieurs puits radiaux par orientation de plusieurs rames au fond du trou Ceased WO1994028280A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU43849/93A AU4384993A (en) 1993-05-21 1993-05-21 Method of drilling multiple radial wells using multiple string downhole orientation
PCT/US1993/004800 WO1994028280A1 (fr) 1993-05-21 1993-05-21 Procede de forage de plusieurs puits radiaux par orientation de plusieurs rames au fond du trou

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1993/004800 WO1994028280A1 (fr) 1993-05-21 1993-05-21 Procede de forage de plusieurs puits radiaux par orientation de plusieurs rames au fond du trou

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WO1994028280A1 true WO1994028280A1 (fr) 1994-12-08

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PCT/US1993/004800 Ceased WO1994028280A1 (fr) 1993-05-21 1993-05-21 Procede de forage de plusieurs puits radiaux par orientation de plusieurs rames au fond du trou

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Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999002815A1 (fr) * 1997-07-11 1999-01-21 Flowtex Technologie Gmbh & Co. Kg Dispositif et procede pour la realisation de ramifications dans un trou de forage
US6942030B2 (en) 2002-09-12 2005-09-13 Cdx Gas, Llc Three-dimensional well system for accessing subterranean zones
US6964298B2 (en) 1998-11-20 2005-11-15 Cdx Gas, Llc Method and system for accessing subterranean deposits from the surface
US6964308B1 (en) 2002-10-08 2005-11-15 Cdx Gas, Llc Method of drilling lateral wellbores from a slant well without utilizing a whipstock
US6976533B2 (en) 1998-11-20 2005-12-20 Cdx Gas, Llc Method and system for accessing subterranean deposits from the surface
US6986388B2 (en) 2001-01-30 2006-01-17 Cdx Gas, Llc Method and system for accessing a subterranean zone from a limited surface area
US6991048B2 (en) 2002-07-12 2006-01-31 Cdx Gas, Llc Wellbore plug system and method
US7025154B2 (en) 1998-11-20 2006-04-11 Cdx Gas, Llc Method and system for circulating fluid in a well system
US7048049B2 (en) 2001-10-30 2006-05-23 Cdx Gas, Llc Slant entry well system and method
US7073595B2 (en) 2002-09-12 2006-07-11 Cdx Gas, Llc Method and system for controlling pressure in a dual well system
US7100687B2 (en) 2003-11-17 2006-09-05 Cdx Gas, Llc Multi-purpose well bores and method for accessing a subterranean zone from the surface
US7134494B2 (en) 2003-06-05 2006-11-14 Cdx Gas, Llc Method and system for recirculating fluid in a well system
US7222670B2 (en) 2004-02-27 2007-05-29 Cdx Gas, Llc System and method for multiple wells from a common surface location
US7264048B2 (en) 2003-04-21 2007-09-04 Cdx Gas, Llc Slot cavity
US7360595B2 (en) 2002-05-08 2008-04-22 Cdx Gas, Llc Method and system for underground treatment of materials
US7571771B2 (en) 2005-05-31 2009-08-11 Cdx Gas, Llc Cavity well system
CN105134073A (zh) * 2015-08-21 2015-12-09 中煤科工集团西安研究院有限公司 径向水平井井底转向装置及其施工方法
US9551209B2 (en) 1998-11-20 2017-01-24 Effective Exploration, LLC System and method for accessing subterranean deposits
WO2023192610A1 (fr) * 2022-04-01 2023-10-05 Baker Hughes Oilfield Operations Llc Procédé de mesure d'interférence de relevé de compas magnétique proche du trépan à partir d'un composant de fond de trou

Citations (4)

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Publication number Priority date Publication date Assignee Title
US1806509A (en) * 1929-06-10 1931-05-19 Naamlooze Venootschap De Bataa Method of adjusting well holes
SU796397A1 (ru) * 1979-03-19 1981-01-15 Печорский Государственный Научно- Исследовательский И Проектныйинститут Нефтяной Промышленности Устройство дл ориентировани ОТКлОНиТЕл
DE3708444A1 (de) * 1987-03-16 1988-09-29 Elisabeth Kopineck Verfahren und vorrichtung zum genauen bestimmen der position eines bohrkopfes beim tiefbohren
US4852666A (en) * 1988-04-07 1989-08-01 Brunet Charles G Apparatus for and a method of drilling offset wells for producing hydrocarbons

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1806509A (en) * 1929-06-10 1931-05-19 Naamlooze Venootschap De Bataa Method of adjusting well holes
SU796397A1 (ru) * 1979-03-19 1981-01-15 Печорский Государственный Научно- Исследовательский И Проектныйинститут Нефтяной Промышленности Устройство дл ориентировани ОТКлОНиТЕл
DE3708444A1 (de) * 1987-03-16 1988-09-29 Elisabeth Kopineck Verfahren und vorrichtung zum genauen bestimmen der position eines bohrkopfes beim tiefbohren
US4852666A (en) * 1988-04-07 1989-08-01 Brunet Charles G Apparatus for and a method of drilling offset wells for producing hydrocarbons

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999002815A1 (fr) * 1997-07-11 1999-01-21 Flowtex Technologie Gmbh & Co. Kg Dispositif et procede pour la realisation de ramifications dans un trou de forage
US9551209B2 (en) 1998-11-20 2017-01-24 Effective Exploration, LLC System and method for accessing subterranean deposits
US6964298B2 (en) 1998-11-20 2005-11-15 Cdx Gas, Llc Method and system for accessing subterranean deposits from the surface
US6976533B2 (en) 1998-11-20 2005-12-20 Cdx Gas, Llc Method and system for accessing subterranean deposits from the surface
US7025154B2 (en) 1998-11-20 2006-04-11 Cdx Gas, Llc Method and system for circulating fluid in a well system
US6986388B2 (en) 2001-01-30 2006-01-17 Cdx Gas, Llc Method and system for accessing a subterranean zone from a limited surface area
US7048049B2 (en) 2001-10-30 2006-05-23 Cdx Gas, Llc Slant entry well system and method
US7360595B2 (en) 2002-05-08 2008-04-22 Cdx Gas, Llc Method and system for underground treatment of materials
US6991048B2 (en) 2002-07-12 2006-01-31 Cdx Gas, Llc Wellbore plug system and method
US7073595B2 (en) 2002-09-12 2006-07-11 Cdx Gas, Llc Method and system for controlling pressure in a dual well system
US7025137B2 (en) 2002-09-12 2006-04-11 Cdx Gas, Llc Three-dimensional well system for accessing subterranean zones
US7090009B2 (en) 2002-09-12 2006-08-15 Cdx Gas, Llc Three-dimensional well system for accessing subterranean zones
US6942030B2 (en) 2002-09-12 2005-09-13 Cdx Gas, Llc Three-dimensional well system for accessing subterranean zones
US6964308B1 (en) 2002-10-08 2005-11-15 Cdx Gas, Llc Method of drilling lateral wellbores from a slant well without utilizing a whipstock
US7264048B2 (en) 2003-04-21 2007-09-04 Cdx Gas, Llc Slot cavity
US7134494B2 (en) 2003-06-05 2006-11-14 Cdx Gas, Llc Method and system for recirculating fluid in a well system
US7100687B2 (en) 2003-11-17 2006-09-05 Cdx Gas, Llc Multi-purpose well bores and method for accessing a subterranean zone from the surface
US7222670B2 (en) 2004-02-27 2007-05-29 Cdx Gas, Llc System and method for multiple wells from a common surface location
US7571771B2 (en) 2005-05-31 2009-08-11 Cdx Gas, Llc Cavity well system
CN105134073A (zh) * 2015-08-21 2015-12-09 中煤科工集团西安研究院有限公司 径向水平井井底转向装置及其施工方法
WO2023192610A1 (fr) * 2022-04-01 2023-10-05 Baker Hughes Oilfield Operations Llc Procédé de mesure d'interférence de relevé de compas magnétique proche du trépan à partir d'un composant de fond de trou
GB2632223A (en) * 2022-04-01 2025-01-29 Baker Hughes Oilfield Operations Llc Method of measurement near-bit magnetic compass reading interference from a downhole component
US12320643B2 (en) 2022-04-01 2025-06-03 Baker Hughes Oilfield Operations Llc Method of measurement near-bit magnetic compass reading interference from a downhole component

Also Published As

Publication number Publication date
AU4384993A (en) 1994-12-20

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