CN103089186B - Plug-in type expansion-head - Google Patents

Plug-in type expansion-head Download PDF

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Publication number
CN103089186B
CN103089186B CN201110343666.3A CN201110343666A CN103089186B CN 103089186 B CN103089186 B CN 103089186B CN 201110343666 A CN201110343666 A CN 201110343666A CN 103089186 B CN103089186 B CN 103089186B
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China
Prior art keywords
plug
expansion
head
component
rubber cushion
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CN201110343666.3A
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CN103089186A (en
Inventor
黄满良
张东亭
刘世强
齐月魁
张飙
王晓梅
李锦红
李民
刘长军
王虹宇
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China Petroleum and Natural Gas Co Ltd
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China Petroleum and Natural Gas Co Ltd
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Abstract

The present invention relates to a kind of plug-in type expansion-head, this device is made up of preexisting component and plug component, and this preexisting component is formed by fixedly connecting by grafting cylinder (4), expansion-head (6), spacer ring (7), rubber cushion (8), dottle pin (10); This plug component is formed by fixedly connecting by shank (1), bearing shell (3), support spring (9), and this preexisting component and plug component are plugged in together by support spring (9); This preexisting component is provided with the described rubber cushion of alternatively distributed many covers (8) and described dottle pin (10); This expansion-head (6) adopts the conical surface and sphere combination, can automatic micro-swing, effectively avoids the jam phenomenon of work progress.The difficult problem entered under the invention solves the concentric tube column of expansion tube tubing string and expansion tube running string; This device have employed the sealing performance two kind nonmetal encapsulant alternatively distributed sealing means different with anti-wear performance, improves the reliability of long well section expandable casing patching and the construction of expansion tube completion.

Description

Plug-in type expansion-head
Technical field
The present invention relates to a kind of plug-in type expansion-head being applied to expandable casing patching and completion.
Background technology
Bulged tube technology is an emerging technology of Oil-Gas Well Engineering field appearance in recent years, and this technology is exactly in the wellbore tubing string is expanded radially into plastic deformation area, to reach a kind of completion, the well workover engineering technology for the purpose of " saving " borehole diameter.This technology is considered to one of core technology of 21 century petroleum drilling and mining industry.
In recent years, many units have all carried out expandable casing patching technical research, and expandable casing patching hundreds of mouthfuls of wells are implemented in the whole nation.And carried out research and the field trial of expansion tube sidetracked hole completion technique.
The expansion-head that current domestic expandable casing patching and completion adopt has two kinds of structural shape one to be thread connection type expansion-head from principle, and another kind is plug-in type expansion-head.Two kinds of expansion-head difficulty of construction when single subsidy does not have large difference.When long well section subsidy or completion, when adopting thread connection type expansion-head due to enter under must taking the single and expansion tube of expansion tube pipe (being also pressure transmission pipe) single alternately under the mode that enters, that constructs is very difficult, and safety is very poor, also require that two single length will be mated, therefore thread connection type expansion-head for long well section subsidy and completion (completion must be generally long well section, and can not be single completion) extremely inapplicable.
For solving in long well section expandable casing patching and expansion tube completion construction technology, entering problem under the concentric tube column of expansion tube tubing string and expansion tube running string and generally adopting plug-in type expansion-head.This kind of expansion-head first seat complete under expansion tube tubing string is hung on well head, and then under enter expansion tube running string, realize connecting through grafting by certain structure of design on both, enter subsidy or the completion interval of well section of design after grafting completes again under entirety, carry out subsidizing or completion construction.For guaranteeing safe construction, plug-in type expansion-head should just have the performance of three aspects: one, can realize reliable grafting.Two, the sealing of expansion-head and expansion tube in long well section construction can be guaranteed.Three, expansion-head effectively can avoid jam in work progress, reduces construction risk.And plug-in type expansion-head domestic at present could not solve the performance requirement of above-mentioned three aspects comprehensively, thus construction also exists certain potential risk.
Summary of the invention
For overcoming the defect that above-mentioned prior art exists, the technical problem to be solved in the present invention is to provide a kind of plug-in type expansion-head, solves in expandable casing patching and long well section subsidy construction, enters problem under the concentric tube column of expansion tube tubing string and expansion tube running string; Ensure the sealing meeting expansion-head and expansion tube in long well section construction; Avoid the jam of work progress.
For solving the problems of the technologies described above, plug-in type expansion-head of the present invention is made up of preexisting component and plug component, and this preexisting component is fixedly connected with by adjusting nut 11, lock-screw 12 by grafting cylinder 4, expansion-head 6, spacer ring 7, rubber cushion 8, dottle pin 10.This plug component is made up of shank 1, bearing shell 3, support spring 9, and bearing shell 3 is fixedly connected on shank 1 by screw 2.Wherein, the support spring 9 of above-mentioned plug component is plugged in together with the grafting cylinder 4 of above-mentioned preexisting component; This preexisting component is provided with alternatively distributed many cover rubber cushions 8 and dottle pin 10, with expansion tube emission cavity inner wall sealing; Above-mentioned expansion-head 6 is that the conical surface and sphere combine, and has automatic micro-oscillating function at the scene, thus effectively can avoid the jam phenomenon of work progress during application.
As preferred version of the present invention, above-mentioned rubber cushion 8 and dottle pin 10 are two covers.Above-mentioned rubber cushion 8 is the material of nonmetal good seal performance.Above-mentioned dottle pin 10 is the material that nonmetal abrasion resistance is good.Improve the sealing reliability of long well section expandable casing patching or the construction of expansion tube completion, ensure that in whole expandable casing patching or the smooth construction of completion engineering time.
Above-mentioned plug component arranges sealing ring 5, makes to keep sealing between itself and preexisting component.
Have endoporus in the middle of above-mentioned spacer ring 7, this endoporus can be unthreaded hole or screw two kinds of forms, and spacer ring 7 can be enclosed within grafting cylinder or screw thread is fixed on grafting cylinder.
After adopting such technical scheme, the present invention adopts this plug-in type expansion-head to solve in expandable casing patching or completion construction, the difficult problem entered under the concentric tube column of expansion tube tubing string and expansion tube running string, than another kind of expansion-head---enter process under during thread connection type expansion tube, difficulty of construction reduces, simplify operation procedure, shorten duty cycle.The present invention, owing to have employed the sealing performance two kind nonmetal encapsulant alternatively distributed sealing means different with anti-wear performance, improves the sealing reliability of long well section expandable casing patching and the construction of expansion tube completion, ensure that completing smoothly of work progress.Meanwhile, the major part expansion-head in the present invention have employed the conical surface and sphere combination, has automatic micro-oscillating function at the scene, effectively avoid the jam phenomenon of work progress during application.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:
Fig. 1 is the structural representation of plug-in type expansion-head of the present invention;
Fig. 2 is the schematic diagram of plug-in type expansion-head preexisting component of the present invention;
Fig. 3 is the schematic diagram of plug-in type expansion-head plug component of the present invention.
Detailed description of the invention
As shown in Figure 1, this device is made up of parts such as shank 1, screw 2, bearing shell 3, grafting cylinder 4, sealing ring 5, expansion-head 6, spacer ring 7, rubber cushion 8, support spring 9, dottle pin 10, adjusting nut 11, lock-screws 12.This expansion-head is assembled into two parts before enforcement expansion operation of going into the well: preexisting component and plug component.Two parts become as a whole by support spring 9 grafting.Two parts realize the sealing between them by sealing ring 5.After during construction, grafting completes at the scene, by under concentric tube column after design attitude, just suppressing can carry out expandable casing patching or completion practice through expansion tube running string and oil pipe (or drilling rod).
As shown in Figure 2, preexisting component is made up of parts such as grafting cylinder 4, expansion-head 6, spacer ring 7, rubber cushion 8, dottle pin 10, adjusting nut 11, lock-screws 12.Be preset in the emission cavity of expansion tube tubing string lower end in processing and manufacturing process before entering well.
Shown in institute Fig. 3, plug component is made up of parts such as shank 1, screw 2, bearing shell 3, sealing ring 5, support springs 9, is arranged on the lower end of expansion tube running string (being also pressure transmission tubing string during construction) when constructing.
After preexisting component has been assembled, in the emission cavity being used special pressure equipment to head into bottom expansion tube tubing string, block up on (during expandable casing patching) or completion plug base (during expansion tube completion) by bottom expansion tube tubing string the end of with again, seal rubber cushion 8 and the dottle pin 10 of preexisting component realize sealing with expansion tube emission cavity inwall.When expandable casing patching or completion construction, with safety slip, its seat is hung on well head after the whole expansion tube tubing strings presetting plug-in type expansion-head preexisting component are entered well.The plug component (see accompanying drawing 3) of this plug-in type expansion-head will be made up of parts such as shank 1, screw 2, bearing shell 3, sealing ring 5, support springs 9 again, be arranged on the lower end of expansion tube running string (being also pressure transmission tubing string during construction), inserting seat hangs in the expansion tube tubing string of well head, is realized connection and the sealing of preexisting component and insertion parts by support spring 9 and sealing ring 5 respectively.After grafting completes, namely available expansion tube running string (being also follow-up pressure transmission tubing string) arrives predetermined subsidy or completion position by under expansion tube tubing string.Then just suppressed by ground pressure equipment and can carry out expandable casing patching or expansion tube completion expansion operation.

Claims (6)

1. a plug-in type expansion-head, be made up of preexisting component and plug component, described preexisting component is made up of grafting cylinder (4), expansion-head (6), spacer ring (7), rubber cushion (8), dottle pin (10), adjusting nut (11) and lock-screw (12), and grafting cylinder (4), expansion-head (6), spacer ring (7), rubber cushion (8) are fixedly connected with by adjusting nut (11), lock-screw (12) with dottle pin (10); Described plug component is made up of shank (1), screw (2), bearing shell (3) and support spring (9), bearing shell (3) is fixedly connected on shank (1) by screw (2), it is characterized in that: support spring (9) and the described preexisting component grafting cylinder (4) of described plug component are plugged in together; Described preexisting component is provided with the described rubber cushion of alternatively distributed many covers (8) and described dottle pin (10); The combination that described expansion-head (6) is the conical surface and sphere.
2. the plug-in type expansion-head according to claim l, is characterized in that: described rubber cushion (8) and dottle pin (10) are two covers.
3. the plug-in type expansion-head according to claim l or 2, is characterized in that: described rubber cushion (8) adopts the material of nonmetal good seal performance to make.
4. the plug-in type expansion-head according to claim l or 2, is characterized in that: described dottle pin (10) adopts the good material of nonmetal abrasion resistance to make.
5. the plug-in type expansion-head according to claim l, is characterized in that: described plug component is provided with sealing ring (5).
6. the plug-in type expansion-head according to claim l, is characterized in that: the centre of described spacer ring (7) is provided with endoporus, and this endoporus is unthreaded hole or screw.
CN201110343666.3A 2011-11-03 2011-11-03 Plug-in type expansion-head Active CN103089186B (en)

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Application Number Priority Date Filing Date Title
CN201110343666.3A CN103089186B (en) 2011-11-03 2011-11-03 Plug-in type expansion-head

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Application Number Priority Date Filing Date Title
CN201110343666.3A CN103089186B (en) 2011-11-03 2011-11-03 Plug-in type expansion-head

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CN103089186B true CN103089186B (en) 2016-03-09

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103790536B (en) * 2014-01-03 2017-05-10 中国石油天然气股份有限公司 Expansion cone

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6450261B1 (en) * 2000-10-10 2002-09-17 Baker Hughes Incorporated Flexible swedge
CN1944945A (en) * 2006-10-31 2007-04-11 刘文西 Expansion pipe combined well repairing device
CN201090146Y (en) * 2007-09-18 2008-07-23 中国石油天然气股份有限公司 Connecting apparatus for new type expansion tube
CN201090161Y (en) * 2007-09-18 2008-07-23 中国石油天然气股份有限公司 New type connection and sealing structure for expansion tube
CN201162498Y (en) * 2008-01-31 2008-12-10 华鼎鸿基石油工程技术(北京)有限公司 Splicing mechanism of expansion prick
CN202381010U (en) * 2011-11-03 2012-08-15 中国石油天然气股份有限公司 Plug-in type expansion head

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6450261B1 (en) * 2000-10-10 2002-09-17 Baker Hughes Incorporated Flexible swedge
CN1944945A (en) * 2006-10-31 2007-04-11 刘文西 Expansion pipe combined well repairing device
CN201090146Y (en) * 2007-09-18 2008-07-23 中国石油天然气股份有限公司 Connecting apparatus for new type expansion tube
CN201090161Y (en) * 2007-09-18 2008-07-23 中国石油天然气股份有限公司 New type connection and sealing structure for expansion tube
CN201162498Y (en) * 2008-01-31 2008-12-10 华鼎鸿基石油工程技术(北京)有限公司 Splicing mechanism of expansion prick
CN202381010U (en) * 2011-11-03 2012-08-15 中国石油天然气股份有限公司 Plug-in type expansion head

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