CN103089186A - Plug-in type expansion head - Google Patents
Plug-in type expansion head Download PDFInfo
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- CN103089186A CN103089186A CN2011103436663A CN201110343666A CN103089186A CN 103089186 A CN103089186 A CN 103089186A CN 2011103436663 A CN2011103436663 A CN 2011103436663A CN 201110343666 A CN201110343666 A CN 201110343666A CN 103089186 A CN103089186 A CN 103089186A
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Abstract
The invention relates to a plug-in type expansion head. The device is composed of a preset part and a plug-in part, the preset part is formed by fixedly connecting a plug-in barrel (4), an expansion head (6), a lantern ring (7), rubber pads (8) and shock insulating pads (10), and the plug-in part is formed by fixedly connecting a plug-in rod (1), a bearing bush (3) and a supporting reed (9). The preset part and the plug-in part are spliced together through the supporting reed (9), and the preset part is provided with a plurality of sets of the rubber pads (8) and the shock insulating pads (10) in alternating mode. The expansion head (6) adopts a conical face and spherical surface combined mode, can slightly sway automatically, and effectively avoids jam during construction process. The plug-in type expansion head solves the problem of concentric pipe column tripping-in of an expansion pipe column and an expansion pipe tripping-in pipe column. The device adopts of a sealing mode of alternatively distributing two non-metal materials which are different in sealing performance and abrasion resisting performance, and accordingly improves long well section expansion pipe allowance and expansion pipe well completion construction reliability.
Description
Technical field
The present invention relates to a kind of plug-in type expansion-head that is applied to expandable casing patching and completion.
Background technology
Bulged tube technology is an emerging technology occurring of Oil-Gas Well Engineering field in recent years, and this technology is expanded radially into tubing string the plastic strain zone exactly in well, to reach " saving " borehole diameter as a kind of completion, the well workover engineering new technology of purpose.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 the expandable casing patching technical research, and hundreds of mouthfuls of wells of expandable casing patching are implemented in the whole nation.And research and the field trial of expansion tube sidetracked hole completion technique have been carried out.
It is the thread connection type expansion-head that the expansion-head that present domestic expandable casing patching and completion adopt has two kinds of structural shapes a kind of from principle, and another kind is the 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 the thread connection type expansion-head, expansion tube is single is lowered to the single mode that alternately is lowered to of pipe (being also the pressure transmission pipe) with expansion tube owing to taking, that constructs is very difficult, and safety is very poor, also require two single length to mate, therefore the thread connection type expansion-head is extremely inapplicable for long well section subsidy and completion (completion must be generally long well section, and can not be single completion).
For solving in long well section expandable casing patching and expansion tube completion construction technology, the concentric tube column of expansion tube tubing string and expansion tube running string is lowered to problem and generally adopts the plug-in type expansion-head.This kind expansion-head is first complete seat under the expansion tube tubing string to be hung on well head, and then be lowered to the expansion tube running string, realize connecting through pegging graft by certain structure of design on both, peg graft complete after whole subsidy or the completion interval of well section that is lowered to design again, subsidize or the completion construction.For guaranteeing safe construction, the plug-in type expansion-head should just have the performance of three aspects: one, can realize reliable pegging graft.Two, can guarantee the sealing of expansion-head and expansion tube in long well section construction.Three, expansion-head can effectively be avoided jam in work progress, reduces construction risk.And present domestic plug-in type expansion-head could not solve the performance requirement of above-mentioned three aspects comprehensively, thereby construction exists certain potential risk.
Summary of the invention
The defective that exists for overcoming above-mentioned prior art, 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, and the concentric tube column of expansion tube tubing string and expansion tube running string is lowered to problem; The sealing of expansion-head and expansion tube in long well section construction is satisfied in assurance; 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 by presetting parts and plug component forms, and this presets parts and is fixedly connected with by adjusting nut 11, lock-screw 12 by the cylinder 4 of pegging graft, expansion-head 6, spacer ring 7, rubber cushion 8, dottle pin 10.This plug component is comprised 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 above-mentioned grafting cylinder 4 that presets parts; This presets parts and 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 the conical surface and sphere combination, has automatic little oscillating function when using at the scene, thereby can effectively avoid the jam phenomenon of work progress.
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 good material of nonmetal abrasion resistance.Improved the sealing reliability of long well section expandable casing patching or expansion tube completion construction, guaranteed in whole expandable casing patching or the smooth construction of completion engineering time.
Above-mentioned plug component arranges sealing ring 5, makes it and preset to keep sealing between parts.
In the middle of above-mentioned spacer ring 7, endoporus, this endoporus being arranged can be unthreaded hole or two kinds of forms of screw, and spacer ring 7 can be enclosed within the grafting cylinder upward or screw thread is fixed on the cylinder of pegging graft.
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 that the concentric tube column of expansion tube tubing string and expansion tube running string is lowered to, than another kind of expansion-head---the process that is lowered to during the thread connection type expansion tube, difficulty of construction reduces, simplify operation procedure, shortened duty cycle.The present invention has improved the sealing reliability of long well section expandable casing patching and expansion tube completion construction owing to having adopted sealing performance two kinds of alternatively distributed sealing means of nonmetal encapsulant different with anti-wear performance, has guaranteed completing smoothly of work progress.Simultaneously, the major part expansion-head in the present invention has adopted the conical surface and sphere combination, has automatic little oscillating function when using at the scene, effectively avoids the jam phenomenon of work progress.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments:
Fig. 1 is the structural representation of plug-in type expansion-head of the present invention;
Fig. 2 is the schematic diagram that plug-in type expansion-head of the present invention presets parts;
Fig. 3 is the schematic diagram of plug-in type expansion-head plug component of the present invention.
The specific embodiment
As shown in Figure 1, this device is comprised of shank 1, screw 2, bearing shell 3, the parts such as cylinder 4, sealing ring 5, expansion-head 6, spacer ring 7, rubber cushion 8, support spring 9, dottle pin 10, adjusting nut 11, lock-screw 12 of pegging graft.This expansion-head is assembled into two parts before the enforcement expansion operation of going into the well: preset parts and plug component.Two parts are pegged graft into as a whole by support spring 9.Two parts are realized sealing between them by sealing ring 5.Peg graft when constructing at the scene complete after, with under concentric tube column after design attitude, be that oil pipe (or drilling rod) is just being suppressed and can be carried out expandable casing patching or completion practice through the expansion tube running string.
As shown in Figure 2, presetting parts is comprised of the parts such as cylinder 4, expansion-head 6, spacer ring 7, rubber cushion 8, dottle pin 10, adjusting nut 11, lock-screw 12 of pegging graft.Be preset in the emission cavity of expansion tube tubing string lower end in processing and manufacturing process before entering well.
Institute is shown in Figure 3, and plug component is comprised 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 (the pressure transmission tubing string when being also construction) when construction.
After presetting assembling parts and completing, head into it in emission cavity of expansion tube tubing string bottom with special pressure equipment, again with expansion tube tubing string bottom with on the end stifled (during expandable casing patching) or completion plug base (during the expansion tube completion), preset seal rubber cushion 8 and the dottle pin 10 of parts and realize sealing with expansion tube emission cavity inwall.When the construction of expandable casing patching or completion, after being entered well, the whole expansion tube tubing strings that preset the plug-in type expansion-head and preset parts with safety slip, its seat is hung on well head.The plug component (seeing accompanying drawing 3) of this plug-in type expansion-head that will be formed by 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 (the pressure transmission tubing string when being also construction), insert seat and hang in the expansion tube tubing string of well head, realize presetting respectively connection and the sealing of parts and insertion parts by support spring 9 and sealing ring 5.Be available expansion tube running string (being also follow-up pressure transmission tubing string) after grafting is completed with under the expansion tube tubing string to predetermined subsidy or completion position.Then just suppressing by ground pressure equipment and can carry out expandable casing patching or expansion tube completion expansion operation.
Claims (6)
1. plug-in type expansion-head, by presetting parts and plug component forms, the described parts that preset are fixedly connected with by adjusting nut (11), lock-screw (12) by, expansion-head (6), spacer ring (7), rubber cushion (8), dottle pin (10); Described plug component is fixedly connected with by screw (2) by shank (1), bearing shell (3), support spring (9), it is characterized in that: described plug component support spring (9) is plugged in together with the described parts grafting cylinders (4) that preset; The described parts that preset are provided with alternatively distributed many cover described rubber cushions (8) and described dottle pin (10); Described expansion-head (6) is the conical surface and sphere combination.
2. plug-in type expansion-head according to claim 1, it is characterized in that: described rubber cushion (8) and dottle pin (10) are two covers.
3. plug-in type expansion-head according to claim 1 and 2, it is characterized in that: described rubber cushion (8) is the material of nonmetal good seal performance.
4. plug-in type expansion-head according to claim 1 and 2, it is characterized in that: described dottle pin (10) is the good material of nonmetal abrasion resistance.
5. plug-in type expansion-head according to claim 1, it is characterized in that: described plug component arranges sealing ring (5).
6. plug-in type expansion-head according to claim 1 is characterized in that: in the middle of described spacer ring (7), endoporus, this endoporus being arranged is unthreaded hole or screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110343666.3A CN103089186B (en) | 2011-11-03 | 2011-11-03 | Plug-in type expansion-head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110343666.3A CN103089186B (en) | 2011-11-03 | 2011-11-03 | Plug-in type expansion-head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103089186A true CN103089186A (en) | 2013-05-08 |
| CN103089186B CN103089186B (en) | 2016-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110343666.3A Active CN103089186B (en) | 2011-11-03 | 2011-11-03 | Plug-in type expansion-head |
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| Country | Link |
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| CN (1) | CN103089186B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103790536A (en) * | 2014-01-03 | 2014-05-14 | 中国石油天然气股份有限公司 | Expansion cone |
Citations (6)
| 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 |
-
2011
- 2011-11-03 CN CN201110343666.3A patent/CN103089186B/en active Active
Patent Citations (6)
| 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103790536A (en) * | 2014-01-03 | 2014-05-14 | 中国石油天然气股份有限公司 | Expansion cone |
| CN103790536B (en) * | 2014-01-03 | 2017-05-10 | 中国石油天然气股份有限公司 | Expansion cone |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103089186B (en) | 2016-03-09 |
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