CN203891812U - Inner flushing pipe slip releasing device for coal bed methane horizontal well - Google Patents
Inner flushing pipe slip releasing device for coal bed methane horizontal well Download PDFInfo
- Publication number
- CN203891812U CN203891812U CN201420314620.8U CN201420314620U CN203891812U CN 203891812 U CN203891812 U CN 203891812U CN 201420314620 U CN201420314620 U CN 201420314620U CN 203891812 U CN203891812 U CN 203891812U
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- China
- Prior art keywords
- piston
- slips
- coal bed
- horizontal well
- releasing device
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Abstract
The utility model relates to an inner flushing pipe slip releasing device for a coal bed methane horizontal well. According to the technical scheme, an upper connector is arranged on the upper portion of a piston cylinder, an airtight space is formed between the lower portion of the piston cylinder and the outer wall of an inner pipe, a setting piston is arranged in the airtight space, a sliding sleeve ball base is arranged in an inner cavity of the inner pipe, and a communication hole is formed in the upper portion and communicated with the airtight space. A first-stage plunger piston is arranged on the lower portion of the setting piston, the lower end of the first-stage plunger piston is a trapezoid boss and matched with the back of a setting slip, the back is of an arc-shaped structure, and the front end of the setting slip is of a saw-tooth-shaped structure. The lower portion of the first-stage plunger piston is connected with a second-stage plunger piston, and the lower portion of the second-stage plunger piston is connected with an external connecting tube through a shear pin. The inner flushing pipe slip releasing device has the advantages that a glass reinforced plastic slotted casing is released and suspended on the coal bed methane horizontal well, and meanwhile inner flushing circulation of the flushing pipe can be kept after releasing; the structure is simple, and releasing pressure is 16 MPa; inner and outer circulation channel switching is performed while releasing is performed, and therefore efficiency is improved substantially.
Description
Technical field
The utility model relates to a kind of coal bed gas horizontal well releasing device, particularly washing pipe slips releasing device in a kind of coal bed gas horizontal well.
Background technology
At present, coal bed gas field does not have special releasing tool to give up to be placed in the glass fiber reinforced plastic slotted casing of horizontal seam well section at home, often give up in glass fiber reinforced plastic slotted casing tubing string process transferring, due to caving in of part well section, glass reinforced plastic sleeve cannot be delivered to desired depth smoothly, existing device cannot be satisfied the demand, and efficiency is lower, need to repeatedly construct.
Summary of the invention
The purpose of this utility model is exactly in view of the foregoing defects the prior art has, washing pipe slips releasing device in a kind of coal bed gas horizontal well is provided, the coal bed gas horizontal well section that solves coal bed gas field is given up and hangs glass fiber reinforced plastic slotted casing, after giving up, can keep the interior punching circulation of washing pipe simultaneously, do not leak, guarantee completing of next step broken glue process.
Its technical scheme is: comprise top connection, piston rod, set piston, set slips, sliding sleeve tee, interior central tube, outer connecting pipe, one-level plunger, trapezoid boss, secondary plunger, shear pin and the inner tube of rushing, the top of described piston rod is top connection, between bottom and the outer wall of inner tube, form confined space, in confined space, be provided with and set piston, the inner chamber of inner tube is provided with sliding sleeve tee, be provided with intercommunicating pore on top, be communicated with confined space; The bottom that sets piston is provided with one-level plunger, and the lower end of one-level plunger is trapezoid boss, coordinates with the back that sets slips, and back is arcuate structure, and the front portion that sets slips is laciniation; The bottom of described one-level plunger is connected with secondary plunger, and the bottom of secondary plunger is connected with outer connecting pipe by shear pin.
The above-mentioned front central place that sets slips is provided with spring.
The inside top of above-mentioned one-level plunger is provided with boss.
The bottom inner chamber of above-mentioned inner tube is provided with inner convex platform, coordinates with interior outer lug boss of rushing central tube top by inner convex platform.
The beneficial effects of the utility model are: in going down process, the phenomenon that occurs being hampered can be rinsed by turn on pump, remove and stop up, slips can not set, guarantee being lowered to smoothly of tubing string, give up down to pitching after desired depth, slips is given up and glass fiber reinforced plastic slotted casing can be suspended on to desired depth, open inner cycle channel simultaneously and complete interior circulating process, complete the broken adhesive process to the outer drilling mud of glass fiber reinforced plastic slotted casing; Dependable performance of the present utility model, it is 3-6MPa that slips sets pressure; Give up simple, the pressure of giving up is 16 MPa; When giving up, carry out the conversion of inner-outer circulation passage, can realize give up after in cyclic flusher, efficiency significantly improves.
Brief description of the drawings
Accompanying drawing 1 is structural representation of the present utility model;
In upper figure: top connection 1, piston rod 2, set piston 3, set slips 4, sliding sleeve tee 5, interior central tube 6, outer connecting pipe 7, one-level plunger 8, trapezoid boss 9, secondary plunger 10, shear pin 11, inner tube 12, the intercommunicating pore 13 of rushing.
Detailed description of the invention
By reference to the accompanying drawings 1, the utility model will be further described:
The utility model comprises top connection 1, piston rod 2, sets piston 3, sets slips 4, sliding sleeve tee 5, interior central tube 6, outer connecting pipe 7, one-level plunger 8, trapezoid boss 9, secondary plunger 10, shear pin 11 and the inner tube 12 of rushing, the top of described piston rod 2 is top connection 1, between the outer wall of bottom and inner tube 12, form confined space, in confined space, be provided with and set piston 3, the inner chamber of inner tube 12 is provided with sliding sleeve tee 5, be provided with intercommunicating pore 13 on top, be communicated with confined space; The bottom that sets piston 3 is provided with one-level plunger 8, and the lower end of one-level plunger 8 is trapezoid boss 9, coordinates with the back that sets slips 4, and back is arcuate structure, and the front portion that sets slips 4 is laciniation; The bottom of described one-level plunger 8 is connected with secondary plunger 10, and the bottom of secondary plunger 10 is connected with outer connecting pipe 7 by shear pin 11.
The front central place that sets slips 4 is provided with spring; The inside top of above-mentioned one-level plunger 8 is provided with boss.The bottom inner chamber of above-mentioned inner tube 12 is provided with inner convex platform, coordinates with interior outer lug boss of rushing central tube 6 tops by inner convex platform.
When the utility model uses, after determining device puts in place, pitching is suppressed, sliding sleeve tee moves down, and gas enters confined space through intercommunicating pore, sets piston the one-level plunger of bottom is exerted pressure, promoting one-level plunger moves down, and then by trapezoid boss, promote to set slips and outwards move, hang glass fiber reinforced plastic slotted casing thereby realize; Proceed to suppress, move down by secondary plunger, shear pin is cut off, the disengaging of giving up of inside and outside tubing string, open inner loop passage simultaneously, continue the flush cycle of washing pipe in keeping, solved the difficult problem that several procedures such as grappling slips instrument, suspension glass fiber reinforced plastic slotted casing, the broken glue of interior flush cycle once complete smoothly;
The utility model has the advantages that: dependable performance, it is 3-6MPa that slips sets pressure; Give up simple, the pressure of giving up is 16 MPa; When giving up, carry out the conversion of inner-outer circulation passage, can realize give up after in cyclic flusher.
Claims (4)
1. washing pipe slips releasing device in a coal bed gas horizontal well, it is characterized in that: comprise top connection (1), piston rod (2), set piston (3), set slips (4), sliding sleeve tee (5), inside rush central tube (6), outer connecting pipe (7), one-level plunger (8), trapezoid boss (9), secondary plunger (10), shear pin (11) and inner tube (12), the top of described piston rod (2) is top connection (1), between the outer wall of bottom and inner tube (12), form confined space, in confined space, be provided with and set piston (3), the inner chamber of inner tube (12) is provided with sliding sleeve tee (5), be provided with intercommunicating pore (13) on top, be communicated with confined space, the bottom that sets piston (3) is provided with one-level plunger (8), and the lower end of one-level plunger (8) is trapezoid boss (9), coordinates with the back that sets slips (4), and back is arcuate structure, and the front portion that sets slips (4) is laciniation, the bottom of described one-level plunger (8) is connected with secondary plunger (10), and the bottom of secondary plunger (10) is connected with outer connecting pipe (7) by shear pin (11).
2. washing pipe slips releasing device in coal bed gas horizontal well according to claim 1, is characterized in that: the described front central place that sets slips (4) is provided with spring.
3. washing pipe slips releasing device in coal bed gas horizontal well according to claim 1, is characterized in that: the inside top of described one-level plunger (8) is provided with boss.
4. washing pipe slips releasing device in coal bed gas horizontal well according to claim 1, is characterized in that: the bottom inner chamber of described inner tube (12) is provided with inner convex platform, coordinates with interior outer lug boss of rushing central tube (6) top by inner convex platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420314620.8U CN203891812U (en) | 2014-06-13 | 2014-06-13 | Inner flushing pipe slip releasing device for coal bed methane horizontal well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420314620.8U CN203891812U (en) | 2014-06-13 | 2014-06-13 | Inner flushing pipe slip releasing device for coal bed methane horizontal well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203891812U true CN203891812U (en) | 2014-10-22 |
Family
ID=51718228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420314620.8U Expired - Fee Related CN203891812U (en) | 2014-06-13 | 2014-06-13 | Inner flushing pipe slip releasing device for coal bed methane horizontal well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203891812U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105201458A (en) * | 2015-11-06 | 2015-12-30 | 中国海洋石油总公司 | Well completion method for glass fiber reinforced plastic sieve tube of coal bed gas horizontal well |
-
2014
- 2014-06-13 CN CN201420314620.8U patent/CN203891812U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105201458A (en) * | 2015-11-06 | 2015-12-30 | 中国海洋石油总公司 | Well completion method for glass fiber reinforced plastic sieve tube of coal bed gas horizontal well |
| CN105201458B (en) * | 2015-11-06 | 2018-01-09 | 中国海洋石油总公司 | A kind of coal bed gas horizontal well fiberglass sieve tube completion method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141022 Termination date: 20160613 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |