CN102877809A - Seal fishing mechanism for tubing collar - Google Patents
Seal fishing mechanism for tubing collar Download PDFInfo
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- CN102877809A CN102877809A CN2012103642580A CN201210364258A CN102877809A CN 102877809 A CN102877809 A CN 102877809A CN 2012103642580 A CN2012103642580 A CN 2012103642580A CN 201210364258 A CN201210364258 A CN 201210364258A CN 102877809 A CN102877809 A CN 102877809A
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- shaft
- centralizer
- seal
- spear
- guide shoe
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Abstract
The invention relates to the technical field of workover with pressure for oil, water and gas fields, in particular to a seal fishing mechanism for a tubing collar. The seal fishing mechanism for the tubing collar at least comprises a spear and an upper connector at the top of the spear and is characterized in that a centralizer is connected to the middle outer surface of the spear, a connecting thread is arranged on the lower outer surface of the spear, and a guide shoe is fixedly connected to the bottom of the spear. The technical problems that multi-packer complex strings fail to be packed by the existing bridge plug technology and multi-seal drills fails in trip out with pressure are solved.
Description
Technical field
The present invention relates to well workover technology with pressure field, Oil, Water, Gas field, particularly a kind of tubing coupling sealing salvaging mechanism.
Background technology
More than Oil, Water, Gas field Operating Pressure plays two envelopes during complicated tubing string, because the oil-pipe bridge plug external diameter is larger at present, can not pass through the major diameter tool strings such as hydraulic anchor, packer, therefore oil pipe inside can't seal, so be necessary in operation device under pressure, to carry out to salvage packer bottom oil pipe under the sealing state with pressure, guarantee that the bottom oil pipe trips out safely.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of tubing coupling sealing salvaging mechanism, can't the complicated tubing string of the many packers of shutoff to solve existing bridging plug technology, seal the technical problem that drilling tool can't trip-out with pressure more.
Technical scheme of the present invention is: a kind of tubing coupling sealing salvaging mechanism is put, which comprises at least shaft, and the top connection at shaft top, it is characterized in that: the middle part outer surface of shaft is connected with centralizer, there is thread at the lower external face place of shaft, and the bottom of shaft is fixedly connected with guide shoe.
Described shaft is cylindrical-shaped structure, and the shaft external diameter is 73mm.
Described centralizer minor axis is 114mm, and major axis is 260mm, and after shaft extended in the sleeve pipe, centralizer and internal surface of sleeve pipe had the 5mm gap.
Described guide shoe is cone-shaped structure, and the shaft bottom is fixedly connected into one structure with the guide shoe taper seat.
The invention has the beneficial effects as follows: tubing coupling sealing fishing device of the present invention has designed centralizer in shaft, the packer bottom oil pipe of required salvaging is positioned at the sleeve pipe medium position, owing to only having minimum 5mm gap between centralizer and the sleeve pipe, therefore the fishing device that has guaranteed the centralizer middle part is in the sleeve pipe centre position all the time, has guaranteed that this fishing device and oil pipe can smooth centerings after salvage the position to the bottom under the sleeve pipe; Guide shoe reduces the make-up difficulty because its cone structure helps to drag for the lance screw thread and is connected with the quick make-up of oil pipe; Rotation shaft after the success of this fishing device and OIH pipe make-up, by thread with reliably be connected by fishing oil pipe, realization is to the sealing of oil pipe inner chamber; Thread is salvaged the fastening rear trip-out of the oil pipe of shaft and required salvaging.
Description of drawings
The present invention is further described below in conjunction with the embodiment accompanying drawing.
Fig. 1 is structural representation of the present invention.
Among the figure: 1, top connection; 2, shaft; 3, centralizer; 4, thread; 5, guide shoe.
The specific embodiment
Shown in the tubing coupling sealing fishing device structural representation of the present invention of Fig. 1, comprise top connection 1, shaft 2, centralizer 3, thread 4, guide shoe 5, wherein shaft 2 tops are top connection 1, the bottom is fixedly connected with guide shoe 5, the middle part outer surface of shaft 2 is fixedly connected with centralizer 3, and there is thread 4 at the lower external face place of shaft 2.
Centralizer 3 external diameters are less than casing inner diameter, thread 4 with by fishing oil pipe upper orifice place screw thread coupling, top connection 1 is in transmission connection with outside actuating unit fluid cylinder.
Concrete salvaging process is: this fishing device externally moves downward along sleeve pipe under the traction of actuating unit, enter band pressuring oil pipe inner chamber by many packers successively, shaft 2 enters by the fishing oil pipe inner chamber under the spacing of centralizer 3 and guide shoe 5 and guiding, outside actuating unit fluid cylinder drives shaft 2 and rotates, with shaft 2 by thread 4 with reliably be connected by fishing oil pipe, also realized simultaneously the sealing to the oil pipe inner chamber, connect fastening after by external impetus mechanism this fishing device that pulls out of hole, after device trips out the fishing device screw thread is dismantled, maintenance totally can be descended well operations again.
Fishing device total length in above-described embodiment is 780mm-840mm, and wherein shaft 2 is cylindrical-shaped structure, and shaft 2 external diameters are 73mm.The internal diameter of sleeve pipe is 124mm, and the internal diameter of oil pipe is 73mm, and guide shoe 5 is cone-shaped structures, and shaft 2 bottoms and guide shoe 5 taper seats are fixedly connected into one structure.
Centralizer 3 is spheroid shapes, and the minor axis external diameter is 114mm, and major axis is 260mm; After the minor axis of shaft 2 extended in the sleeve pipe, centralizer 3 had the 5mm gap with internal surface of sleeve pipe.
This fishing device is transferred to by behind the fishing oil pipe position, slowly transfers the examination make-up, and oil pipe is carried in examination after the successful connection, observes the suspending weight conversion, and the affirmation oil pipe drags for and obtains rear trip-out.
Claims (4)
1. a tubing coupling sealing salvaging mechanism which comprises at least shaft, and the top connection at shaft top, and it is characterized in that: the middle part outer surface of shaft is connected with centralizer, and there is thread at the lower external face place of shaft, and the bottom of shaft is fixedly connected with guide shoe.
2. a kind of tubing coupling according to claim 1 seals salvaging mechanism, and it is characterized in that: described shaft is cylindrical-shaped structure, and the shaft external diameter is 73mm.
3. a kind of tubing coupling according to claim 1 seals salvaging mechanism, and it is characterized in that: described centralizer is the spheroid shape, and the minor axis of centralizer is 114mm, and major axis is 260mm, and after shaft extended in the sleeve pipe, centralizer and internal surface of sleeve pipe had the 5mm gap.
4. a kind of tubing coupling according to claim 1 seals salvaging mechanism, and it is characterized in that: described guide shoe is cone-shaped structure, and the shaft bottom is fixedly connected into one structure with the guide shoe taper seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210364258.0A CN102877809B (en) | 2012-09-26 | 2012-09-26 | Seal fishing mechanism for tubing collar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210364258.0A CN102877809B (en) | 2012-09-26 | 2012-09-26 | Seal fishing mechanism for tubing collar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102877809A true CN102877809A (en) | 2013-01-16 |
| CN102877809B CN102877809B (en) | 2014-08-20 |
Family
ID=47479299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210364258.0A Expired - Fee Related CN102877809B (en) | 2012-09-26 | 2012-09-26 | Seal fishing mechanism for tubing collar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102877809B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527125A (en) * | 2013-10-24 | 2014-01-22 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Backoff combination tool and method for pulling out tool with large diameter in gas well under pressure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2683831Y (en) * | 2004-02-06 | 2005-03-09 | 盘锦金盘科技有限责任公司 | One time drilling combined operation pipe column |
| CN201620795U (en) * | 2010-02-09 | 2010-11-03 | 王建忠 | Novel oil-field fishing tap device |
| CN201943628U (en) * | 2010-12-17 | 2011-08-24 | 中国石油天然气集团公司 | Primer stabber for buckling and fishing |
| CN202381015U (en) * | 2011-12-16 | 2012-08-15 | 中国石油天然气股份有限公司 | Combined fishing cylinder for pumping well of oil field |
| CN202767932U (en) * | 2012-09-26 | 2013-03-06 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Tubing coupling sealing fishing device |
-
2012
- 2012-09-26 CN CN201210364258.0A patent/CN102877809B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2683831Y (en) * | 2004-02-06 | 2005-03-09 | 盘锦金盘科技有限责任公司 | One time drilling combined operation pipe column |
| CN201620795U (en) * | 2010-02-09 | 2010-11-03 | 王建忠 | Novel oil-field fishing tap device |
| CN201943628U (en) * | 2010-12-17 | 2011-08-24 | 中国石油天然气集团公司 | Primer stabber for buckling and fishing |
| CN202381015U (en) * | 2011-12-16 | 2012-08-15 | 中国石油天然气股份有限公司 | Combined fishing cylinder for pumping well of oil field |
| CN202767932U (en) * | 2012-09-26 | 2013-03-06 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Tubing coupling sealing fishing device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527125A (en) * | 2013-10-24 | 2014-01-22 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Backoff combination tool and method for pulling out tool with large diameter in gas well under pressure |
| CN103527125B (en) * | 2013-10-24 | 2016-04-20 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Major diameter tool method in a kind of back-off combination tool and with pressure gas well well |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102877809B (en) | 2014-08-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140820 Termination date: 20160926 |