CN101718169B - Method for realizing six-stage multilateral well completion by rear lower three-way branching mechanism - Google Patents
Method for realizing six-stage multilateral well completion by rear lower three-way branching mechanism Download PDFInfo
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- CN101718169B CN101718169B CN 200910219918 CN200910219918A CN101718169B CN 101718169 B CN101718169 B CN 101718169B CN 200910219918 CN200910219918 CN 200910219918 CN 200910219918 A CN200910219918 A CN 200910219918A CN 101718169 B CN101718169 B CN 101718169B
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000007789 sealing Methods 0.000 claims abstract description 26
- 238000005553 drilling Methods 0.000 claims abstract description 12
- 230000001681 protective effect Effects 0.000 claims description 18
- 239000000725 suspension Substances 0.000 claims description 12
- 238000010276 construction Methods 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 6
- 238000005987 sulfurization reaction Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 210000000664 rectum Anatomy 0.000 claims description 2
- 230000006378 damage Effects 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 4
- 230000002175 menstrual effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
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Abstract
The method is realized by a six-stage branch well completion system and a pre-deformed three-way branch mechanism, and comprises a technical casing, a hollow slope guide, a slope guide outer annular sealing body, a hanging positioning director, a positioning director annular sealing body upper sealing body of the branch mechanism, a branch mechanism lower sealing body, a branch well completion pipe column, a branch mechanism main well pipe barrel, a guide and a branch well pipe barrel of the branch mechanism: the invention is characterized in that after the branch well is drilled, the pre-deformation three-way branching mechanism is put into the branch well and expanded to directly form window mechanical support connection and sealing. The method solves the problems that the window device is easy to wear or damage during drilling and the branch well bore is small in the prior art, and can be widely used for well drilling and completion operation of oil-gas-water wells.
Description
Technical field:
The present invention relates to oil field oil, gas, well and bore the method that a kind of rear lower threeway bifurcation mechanism that completion uses is realized the six-grade branch well completion.
Background technology:
Multi-lateral well technology is a kind of important means of economical and efficient exploitation oil-gas reservoir, can significantly increase the bare area of oil-gas reservoir, realizes that a main borehole bores the purpose that reaches a plurality of reservoirs.This technology not only can reduce well location and well site floor space, can also reduce the expenses such as relocation equipment and later stage oil producing operation management, significantly low oil and gas development cost.
At present the field is take the following completion mode of level Four as main, and the hydraulic seal at branch well window place can not get ensureing.External most the employing in the protective casing bottom installed prefabricated window bifurcation mechanism, then creeps into by bifurcated tubing string inside, and the method that is lowered to completion tubular column after finishing drilling is carried out the six-grade branch well construction.This mode easily causes certain wearing and tearing or destruction to window device when creeping into, and the size of branch well hole is less.Be necessary the six-grade branch well completion method that research and development is new, improve window intensity, and guarantee that branch well hole has larger size and satisfies the oil recovery needs.
Summary of the invention:
The purpose of this invention is to provide a kind of rear lower threeway bifurcation mechanism and realize the method for six-grade branch well completion, it is easily that window device is caused certain wearing and tearing or destruction creeping into that the method has solved the existing method that exists in the prior art, and the less problem of the size of branch well hole.
the technical solution adopted for the present invention to solve the technical problems is: the method be by after the predeformation threeway bifurcation mechanism that is lowered to realize, the six-grade branch well completion system, by protective casing, hollow wedge deflection tool, the outer annular space seal of wedge deflection tool, hang the positioning and directing device, positioning and directing device annular space seal, seal on bifurcation mechanism, bifurcation mechanism, bifurcation mechanism lower seal body, the branch well hole completion tubular column, bifurcation mechanism main borehole socket, guide, bifurcation mechanism branch well hole socket forms: notable feature of the present invention is after the branch well hole finishing drilling, be lowered to predeformation threeway bifurcation mechanism, after putting in place and expand, instrument directly forms window machinery support and connection and sealing, in the six-grade branch well completion system: the outer annular space seal of wedge deflection tool is as the body part of hollow wedge deflection tool, adopt sulfuration or suit mode to be connected with hollow wedge deflection tool body, after expanding, realizes the outer annular space seal of wedge deflection tool the annular space sealing of hollow wedge deflection tool and protective casing, hang the positioning and directing device and adopt screw thread with bifurcation mechanism, welding or screw are realized connecting, and are sealed by seal on bifurcation mechanism between both, fill after positioning and directing device annular space seal expands and hang annular space sealing between positioning and directing device and protective casing, bifurcation mechanism lower seal body sulfuration or be sleeved on bifurcation mechanism main split's body bottom realizes after expansion that the annular space of hollow wedge deflection tool and bifurcation mechanism seals, and the branch well hole completion tubular column is connected with sealing thread or sealed suspension device with bifurcation mechanism, form complete mechanical support and hydraulic seal between the protective casing of the threeway bifurcation mechanism after expansion and window up and down and branch's tubing string, reached the purpose of six grades of completions, before construction: with the high-ductility material of the body in the threeway bifurcation mechanism, adopt corresponding deformation and welding procedure to realize, the branch well hole socket relatively and the main borehole socket to grow, be threaded with the elasticity guide in main borehole socket bottom, during construction, at first complete main borehole and creep into and be lowered to completion tubular column, be lowered to the related tools of windowing such as whipstock in protective casing, carry out branch well hole after windowing to creep into, propose whipstock after finishing drilling, after being lowered to the hollow wedge deflection tool positioning and directing suspension with outer annular space seal, utilize the expansion mechanism operation to make lower annular space sealing, make to device and be connected and sealed with hanging the location on ground with the bifurcation mechanism of upper seal, when being lowered into the window's position, completing bifurcated and positioning and directing and hang, and utilize machinery or hydraulic way positioning and directing device sealing cubical expansion envelope, the branch well hole completion tubular column can be with the suspension that is lowered to or is lowered to separately and lead of bifurcation mechanism instrument, having realized being rigidly connected and excellent sealing in each position of threeway bifurcation mechanism, realizes six grades of completions, whether this six-grade branch well completion method is lowered to predeformation threeway bifurcation mechanism after main split's well finishing drilling, the main split tubing string at window place connects and has higher mechanical strength and good hydraulic seal, and has to stimulate the menstrual flow in larger and be convenient to recover the oil and workover treatment.
The invention has the beneficial effects as follows: the invention provides a kind of expansion of metal tubing predeformation threeway bifurcation mechanism that utilizes, directly as well bindiny mechanism of main split, realize the method for six-grade branch well completion after being lowered into the branch well window place during completion and expanding; Utilize the present invention to carry out six-grade branch well when boring completion, reduced external Multilateral Wells Technology Need and expanded in advance well and be lowered to the aided process such as window device, the possibility that has reduced simultaneously window device wearing and tearing in the drilling process or destroyed, reliability is higher; Six grades of completion systems that utilize the present invention to realize have overcome external six grades of completion systems and only can be applied to the drawback of new well, and had larger interior latus rectum, can be widely used in all kinds of the old and new's wells.
Description of drawings:
Fig. 1 is six-grade branch well completion system structural representation of the present invention.
Fig. 2 is threeway bifurcation mechanism structural representation of the present invention.
In figure 1, protective casing, 2, hollow wedge deflection tool, 3, the outer annular space seal of wedge deflection tool, 4, hang the positioning and directing device, 5, positioning and directing device annular space seal, 6, seal on bifurcation mechanism, 7, bifurcation mechanism, 8 bifurcation mechanism lower seal bodies, 9, branch well hole completion tubular column, 10, bifurcation mechanism main borehole socket, 11, guide, 12, bifurcation mechanism branch well hole socket.
The specific embodiment:
In the accompanying drawings, a kind of rear lower threeway bifurcation mechanism realizes that the method for six-grade branch well completion realizes by six-grade branch well completion system and predeformation threeway bifurcation mechanism.
In Fig. 1, the six-grade branch well completion system is comprised of seal 6, bifurcation mechanism 7, bifurcation mechanism lower seal body 8, branch well hole completion tubular column 9 on protective casing 1, hollow wedge deflection tool 2, the outer annular space seal 3 of wedge deflection tool, suspension positioning and directing device 4, positioning and directing device annular space seal 5, bifurcation mechanism: notable feature of the present invention is after the branch well hole finishing drilling, be lowered to predeformation threeway bifurcation mechanism, directly form window machinery support and connection and sealing after instrument puts in place and expands; The outer annular space seal 3 of wedge deflection tool is as the critical piece of hollow wedge deflection tool 2; Adopt sulfuration or suit mode to be connected with hollow wedge deflection tool 2 bodies; After expanding, realizes the outer annular space seal 3 of wedge deflection tool that hollow wedge deflection tool 2 and the annular space of protective casing 1 seal; Hang positioning and directing device 4 and adopt screw threads with bifurcation mechanism 7, welding or screw are realized connecting, both between by 6 sealings of seal on bifurcation mechanism; Fill after positioning and directing device annular space seal 5 expands and hang annular space sealing between positioning and directing device 4 and protective casing 1; Bifurcation mechanism lower seal body 8 sulfuration or be sleeved on bifurcation mechanism 7 main split's body bottoms realizes the annular space sealing of hollow wedge deflection tool 2 and bifurcation mechanism after expansion, branch well hole completion tubular column 9 is connected with bifurcation mechanism 7 use sealing threads or sealed suspension device; Form complete mechanical support and hydraulic seal between the protective casing of the threeway bifurcation mechanism after expansion and window up and down and branch's tubing string, reached the purpose of six grades of completions; Before construction: with the high-ductility material of the body in the threeway bifurcation mechanism, adopt corresponding deformation and welding procedure to realize; Bifurcation mechanism branch well hole socket 12 relatively and bifurcation mechanism main borehole socket 10 to grow, be threaded with elasticity guide 11 in bifurcation mechanism main borehole socket 10 bottoms; During construction, complete at first that main borehole creeps into and descend completion tubular column, at related tools of windowing such as protective casing 1 interior lower whipstocks, carry out branch well hole after windowing to creep into; Point out whipstock after finishing drilling, after being lowered to the hollow wedge deflection tool positioning and directing suspension with the outer annular space seal 3 of wedge deflection tool, utilize the expansion mechanism operation to make lower annular space sealing; Make to device 4 and be connected and sealed with hanging the location on ground with the bifurcation mechanism 7 of seal on bifurcation mechanism 6, when being lowered into the window's position, completing bifurcated and positioning and directing and hang, and utilize machinery or hydraulic way to make positioning and directing device seal 5 swollen envelopes; Branch well hole completion tubular column 9 can be with the suspension that is lowered to or is lowered to separately and lead of bifurcation mechanism 7 instruments; Having realized being rigidly connected and excellent sealing in each position of threeway bifurcation mechanism, realizes six grades of completions; This six-grade branch well completion method is that main split's well finishes and is lowered to predeformation threeway bifurcation mechanism after boring, the main split tubing string at window place connects and has higher mechanical strength and good hydraulic seal, and has to stimulate the menstrual flow in larger and be convenient to recover the oil and workover treatment.
In Fig. 2, threeway bifurcation mechanism of the present invention before distortion is made of bifurcation mechanism main borehole socket 10, guide 11, bifurcation mechanism branch well hole socket 12; Branch well hole 12 is longer than main borehole socket 10, and main borehole socket 10 bottoms are threaded with elasticity guide 11.During construction, at first complete main borehole and creep into and be lowered to completion tubular column, be lowered to the related tools of windowing such as whipstock in protective casing, carry out branch well hole after windowing and creep into.Propose whipstock after finishing drilling, after being lowered to the hollow wedge deflection tool positioning and directing suspension with outer annular space seal 3, utilize the expansion mechanism operation to make lower annular space sealing.Bifurcation mechanism 7 with upper seal 6 is connected and sealed with hanging positioning and directing device 4 on ground, when being lowered into the window's position, completing bifurcated and positioning and directing and hangs, and utilize machinery or hydraulic way to make positioning and directing device seal 5 swollen envelopes.Branch well hole completion tubular column 9 can be with bifurcation mechanism 7 suspension that is lowered to or is lowered to separately and lead.Having realized being rigidly connected and excellent sealing in each position of threeway bifurcation mechanism, realizes six grades of completions.
Claims (1)
1. lower threeway bifurcation mechanism is realized the method for six-grade branch well completion after one kind, realize by the six-grade branch well completion system, the six-grade branch well completion system is by protective casing (1), hollow wedge deflection tool (2), the outer annular space seal (3) of wedge deflection tool, hang positioning and directing device (4), positioning and directing device annular space seal (5), seal on bifurcation mechanism (6), bifurcation mechanism (7), bifurcation mechanism lower seal body (8), branch well hole completion tubular column (9) forms, it is characterized in that: after the branch well hole finishing drilling, be lowered to predeformation threeway bifurcation mechanism, after putting in place and expand, instrument directly forms window machinery support and connection and sealing, the outer annular space seal (3) of wedge deflection tool is as the critical piece of hollow wedge deflection tool (2), adopt sulfuration or suit mode to be connected with hollow wedge deflection tool (2) body, after expanding, realizes the outer annular space seal (3) of wedge deflection tool that hollow wedge deflection tool (2) and the annular space of protective casing (1) seal, hang positioning and directing device (4) and adopt screw thread with bifurcation mechanism (7), welding or screw are realized connecting, and are sealed by seal on bifurcation mechanism (6) between both, fill after positioning and directing device annular space seal (5) expands and hang annular space sealing between positioning and directing device (4) and protective casing (1), bifurcation mechanism lower seal body (8) vulcanizes or is sleeved on bifurcation mechanism main borehole socket (10) bottom, realize after expansion that hollow wedge deflection tool (2) and the annular space of bifurcation mechanism seal, branch well hole completion tubular column (9) is connected with sealing thread or sealed suspension device with bifurcation mechanism (7), form complete mechanical support and hydraulic seal between the protective casing of the threeway bifurcation mechanism after expansion and window up and down and branch's tubing string, reached the purpose of six grades of completions, before construction: with the high-ductility material of the body in the threeway bifurcation mechanism, adopt corresponding deformation and welding procedure to realize, bifurcation mechanism branch well hole socket (12) will be grown with respect to bifurcation mechanism main borehole socket (10), is threaded with elasticity guide (11) in bifurcation mechanism main borehole socket (10) bottom, during construction, complete at first that main borehole creeps into and descend completion tubular column, lower whipstock, carry out branch well hole to creep into after windowing in protective casing (1), salvage whipstock after finishing drilling, after being lowered to the hollow wedge deflection tool positioning and directing suspension with the outer annular space seal (3) of wedge deflection tool, utilize the expansion mechanism operation to make lower annular space sealing, bifurcation mechanism (7) with seal on bifurcation mechanism (6) is connected and sealed with suspension positioning and directing device (4) on ground, when being lowered into the window's position, complete bifurcated and positioning and directing and hang, and utilize machinery or hydraulic way to make the swollen envelope of positioning and directing device seal (5), branch well hole completion tubular column (9) is lowered to bifurcation mechanism (7), having realized being rigidly connected and excellent sealing in each position of threeway bifurcation mechanism, realizes six grades of completions, this six-grade branch well completion method is that main split's well finishes and is lowered to predeformation threeway bifurcation mechanism after boring, and main split's tubing string at window place connects and has higher mechanical strength and good hydraulic seal, has larger interior latus rectum and is convenient to recover the oil and workover treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910219918 CN101718169B (en) | 2009-11-17 | 2009-11-17 | Method for realizing six-stage multilateral well completion by rear lower three-way branching mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910219918 CN101718169B (en) | 2009-11-17 | 2009-11-17 | Method for realizing six-stage multilateral well completion by rear lower three-way branching mechanism |
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| CN101718169A CN101718169A (en) | 2010-06-02 |
| CN101718169B true CN101718169B (en) | 2013-11-06 |
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| CN 200910219918 Expired - Fee Related CN101718169B (en) | 2009-11-17 | 2009-11-17 | Method for realizing six-stage multilateral well completion by rear lower three-way branching mechanism |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102102490B (en) * | 2010-12-17 | 2013-05-22 | 中国石油集团长城钻探工程有限公司 | Feeding and expanding method of forked three-way mechanism based on downward orientation |
| CN104453776B (en) * | 2014-11-14 | 2017-01-18 | 中国石油集团长城钻探工程有限公司 | Six-level branching well built-in window sealing well completion method |
| CN113279713B (en) * | 2020-02-19 | 2022-11-25 | 中国石油化工股份有限公司 | Branch window strutting arrangement |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1182165A (en) * | 1996-03-11 | 1998-05-20 | 安娜钻机国际有限公司 | Method and apparatus for establishing branch wells at node of parent well |
| CN1414207A (en) * | 2002-11-02 | 2003-04-30 | 辽河石油勘探局工程技术研究院 | Oil field branching well reentry device |
| CN1560419A (en) * | 2004-02-19 | 2005-01-05 | 北京派特罗尔科技发展有限责任公司 | Apparatus of drilling well for gas and oil branching well and its method |
| CN201292800Y (en) * | 2008-11-03 | 2009-08-19 | 中国石油集团长城钻探工程有限公司 | Six-grade branch well window sealing mechanism |
-
2009
- 2009-11-17 CN CN 200910219918 patent/CN101718169B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1182165A (en) * | 1996-03-11 | 1998-05-20 | 安娜钻机国际有限公司 | Method and apparatus for establishing branch wells at node of parent well |
| CN1414207A (en) * | 2002-11-02 | 2003-04-30 | 辽河石油勘探局工程技术研究院 | Oil field branching well reentry device |
| CN1560419A (en) * | 2004-02-19 | 2005-01-05 | 北京派特罗尔科技发展有限责任公司 | Apparatus of drilling well for gas and oil branching well and its method |
| CN201292800Y (en) * | 2008-11-03 | 2009-08-19 | 中国石油集团长城钻探工程有限公司 | Six-grade branch well window sealing mechanism |
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| CN101718169A (en) | 2010-06-02 |
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