CN201883977U - Continuous oil pipe type fishing tool for slip downhole choke - Google Patents
Continuous oil pipe type fishing tool for slip downhole choke Download PDFInfo
- Publication number
- CN201883977U CN201883977U CN2010206710073U CN201020671007U CN201883977U CN 201883977 U CN201883977 U CN 201883977U CN 2010206710073 U CN2010206710073 U CN 2010206710073U CN 201020671007 U CN201020671007 U CN 201020671007U CN 201883977 U CN201883977 U CN 201883977U
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- claw
- slip
- locating piece
- top connection
- spring
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- Expired - Lifetime
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Abstract
A continuous oil pipe type fishing tool for a slip downhole choke is applied to the slip downhole choke fishing of oil and gas wells, and adopts the structure that the upper end of a central pipe is in threaded connection with the inner wall of an upper connector, a ring-shaped cylinder is arranged at the lower end of the upper connector, and an inner spring is arranged in a ring-shaped space between the ring-shaped cylinder and the central pipe; the upper end of a locking sleeve is arranged in the ring-shaped space, and is fixed in the ring-shaped cylinder at the lower end of the upper connector through a safety shear pin; the upper end of a claw is embedded in the outer wall of the locking sleeve, and a positioning block is arranged at the upper end of the claw; a cylindrical bulge is formed on the outer arc surface of the positioning block and is embedded in a through hole at the upper end of the claw; and the outer wall of the locking sleeve is sleeved by an outer spring. The utility model has the effects that the upper connector is directly connected to the lower end of an oil pipe column for the slip downhole choke fishing; and as the extreme tension of a continuous oil pipe is ten times of that of a well testing wire, the fishing success rate of resisted slip downhole chokes is greatly increased, and downhole accidents are further avoided.
Description
Technical field
The utility model relates to petroleum gas production gas technology field, and particularly a kind of down-hole fishing instrument is a kind of slip-type underground throttle device fishing tool.
Background technology
At present, in natural gas extraction,, underground throttle device usually is installed in the gas well down-hole for step-down, throttling, limited production.Present underground throttle device is the slip-type underground throttle device, produce need gas well to transfer to produce to change the restriction choke valve or since restriction choke when losing efficacy, salvage restriction choke.Because conventional salvaging of underground throttle device is to use piano wire (diameter 2.8mm) the fastening means string of well testing truck and conventional fishing tool to salvage, this steel wire limit tension has limitation, in a single day restriction choke is hampered in well, the danger of breaking piano wire is just arranged, and causes down-hole accident.
The utility model content
The purpose of this utility model is: a kind of slip-type underground throttle device coiled tubing fishing tool is provided, is connected in the lower end of coiled tubing, can realize that underground throttle device salvages, the circumscribed deficiency of steel wire limit tension when overcoming conventional piano wire and salvaging restriction choke.
The technical solution adopted in the utility model is: slip-type underground throttle device coiled tubing fishing tool, mainly by top connection, central tube, inner spring, safety cut off, outer spring, locating piece, claw and locking cover form, there is the oil pipe internal thread upper end of top connection; It is characterized in that: the upper end of central tube is threaded on the top connection inwall, in the lower end of top connection circular cylinder is arranged, and between circular cylinder and the central tube annular space is arranged, and an inner spring is arranged in annular space, and inner spring is a cylindrical compression spring; The upper end of locking cover in annular space and safety cut off will the locking cover the upper end be fixed in the circular cylinder of top connection lower end; The lower end of inner spring compresses with the upper surface of locking cover; The upper end of claw is nested on the locking cover outer wall, and in the claw upper end locating piece is arranged, and the inner arc surface of locating piece contacts with the outer wall of central tube, and the lower end of locating piece is on the limited step of central tube lower end; On the exterior arc surface of locating piece cylindrical protrusions is arranged, the cylindrical protrusions of locating piece embeds in the through hole of claw upper end; Be with outer spring on the outer wall of locking cover, outer spring is between the upper surface and top connection lower surface of claw; There is inwardly protruded pawl the lower end of claw, and the quantity of pawl is three, and the pawl of claw is in windowing of lower end overlapped in locking.
The beneficial effects of the utility model: the utility model slip-type underground throttle device coiled tubing fishing tool, top connection 1 directly is connected the lower end of tubing string, can carry out the slip-type underground throttle device salvages, because the coiled tubing limit tension is tens of times of the piano wire limit tension, can improve the fishing success ratio of the restriction choke that is hampered greatly, avoid the generation of down-hole accident.
Description of drawings
Fig. 1 is the utility model slip-type underground throttle device coiled tubing fishing tool structural profile schematic diagram.
Among the figure, the 1-top connection, the 2-central tube, the 3-inner spring, 4-safety cuts off, the 5-outer spring, the 6-locating piece, the 7-claw, 8-locks cover.
The specific embodiment
Embodiment 1: with a slip-type underground throttle device coiled tubing fishing tool is example, and the utility model is described in further detail.
Consult Fig. 1.The utility model slip-type underground throttle device coiled tubing fishing tool, by top connection 1, central tube 2, inner spring 3, safety cut off 4, outer spring 5, locating piece 6, claw 7 and locking cover 8 form.There is the oil pipe internal thread upper end of top connection 1.
The upper end of central tube 2 is threaded on top connection 1 inwall, in the lower end of top connection 1 circular cylinder is arranged, and an annular space is arranged between circular cylinder and the central tube 2, and an inner spring 3 is arranged in annular space, and inner spring 3 is a cylindrical compression spring.The upper end of locking cover 8 in annular space and safety cut off 4 and will lock and overlap 8 upper ends and be fixed in the circular cylinder of top connection 1 lower end.The lower end of inner spring 3 compresses with the upper surface of locking cover 8.The upper end of claw 7 is nested on locking cover 8 outer walls, and in claw 7 upper ends locating piece 6 is arranged, and the inner arc surface of locating piece 6 contacts with the outer wall of central tube 2, and locating piece 6 can drive claw 7 and upwards slide.The lower end of locating piece 6 is on the limited step of central tube 2 lower ends.On the exterior arc surface of locating piece 6 cylindrical protrusions is arranged, the cylindrical protrusions of locating piece 6 embeds in the through hole of claw 7 upper ends.Be with outer spring 5 on the outer wall of locking cover 8, outer spring 5 is between the upper surface and top connection 1 lower surface of claw 7; There is inwardly protruded pawl the lower end of claw 7, and the quantity of pawl is three, and the pawl of claw 7 is in windowing of 8 lower ends overlapped in locking.
Summary slip-type underground throttle device coiled tubing fishing tool is salvaged process.Consult Fig. 1.Connect fishing tool before the use, order is: coiled tubing post+special-purpose fastening means+slip-type underground throttle device coiled tubing fishing tool.The utility model need of work is finished fishing by two steps.1, grasps restriction choke; 2, separate and grab restriction choke.
1, grasps restriction choke
Transfer the down-hole fast and salvage coiled tubing being positioned at more than the slip-type underground throttle device 2～3m during operation, claw 7 radial deformations under the effect of inertia force, the restriction choke fishing neck is inserted in the claw 7, since claw 7 in the raw the time internal diameter less than restriction choke fishing neck external diameter, this moment, claw 7 was successfully caught restriction choke fishing neck necking down position, along with carrying on the coiled tubing restriction choke was taken out pit shaft.
2, separate and grab restriction choke
Quick jarring coiled tubing makes progress, top connection 1 moves upward with respect to locking cover 8 with central tube 2, safety cuts off 4 and is cut off, inner spring 3 elastic force discharge, because inner spring 3 elastic force are greater than the elastic force of outer spring 5, top connection 1 moves upward with respect to locking cover 8 with central tube 2, because the effect of locating piece 6, claw 7 also moves upward with respect to locking cover 8 with locating piece 6, because the barrier effect of locking cover 8 conical surfaces, claw 7 can be strutted, at this moment, claw 7 internal diameters are separated and are grabbed restriction choke greater than restriction choke fishing neck external diameter.
Claims (1)
1. slip-type underground throttle device coiled tubing fishing tool, mainly cut off (4), outer spring (5), locating piece (6), claw (7) and locking cover (8) by top connection (1), central tube (2), inner spring (3), safety and form, there is the oil pipe internal thread upper end of top connection (1); It is characterized in that: the upper end of central tube (2) is threaded on top connection (1) inwall, there is circular cylinder lower end in top connection (1), circular cylinder and central tube have annular space between (2), and an inner spring (3) is arranged in annular space, and inner spring (3) is a cylindrical compression spring; The upper end of locking cover (8) in annular space and safety cut off the upper end that (4) will lock cover (8) and be fixed in the circular cylinder of top connection (1) lower end; The lower end of inner spring (3) compresses with the upper surface of locking cover (8); The upper end of claw (7) is nested on locking cover (8) outer wall, and in claw (7) upper end locating piece (6) is arranged, and the inner arc surface of locating piece (6) contacts with the outer wall of central tube (2), and the lower end of locating piece (6) is on the limited step of central tube (2) lower end; On the exterior arc surface of locating piece (6) cylindrical protrusions is arranged, the cylindrical protrusions of locating piece (6) embeds in the through hole of claw (7) upper end; Be with outer spring (5) on the outer wall of locking cover (8), outer spring (5) is between the upper surface and top connection (1) lower surface of claw (7); There is inwardly protruded pawl the lower end of claw (7), and the quantity of pawl is three, and the pawl of claw (7) is in windowing of (8) lower end overlapped in locking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206710073U CN201883977U (en) | 2010-12-10 | 2010-12-10 | Continuous oil pipe type fishing tool for slip downhole choke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206710073U CN201883977U (en) | 2010-12-10 | 2010-12-10 | Continuous oil pipe type fishing tool for slip downhole choke |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201883977U true CN201883977U (en) | 2011-06-29 |
Family
ID=44181517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206710073U Expired - Lifetime CN201883977U (en) | 2010-12-10 | 2010-12-10 | Continuous oil pipe type fishing tool for slip downhole choke |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201883977U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527128A (en) * | 2012-07-04 | 2014-01-22 | 中国石油天然气股份有限公司 | Fishing tool for natural gas extraction downhole throttle device and operation method of fishing tool |
| CN107420062A (en) * | 2017-08-14 | 2017-12-01 | 中国石油大学(华东) | A kind of bumper jar for continuous pipe unfreezing |
| CN108590559A (en) * | 2018-07-12 | 2018-09-28 | 长江大学 | A kind of down-hole fishing device |
| CN112943142A (en) * | 2021-01-12 | 2021-06-11 | 中国石油天然气股份有限公司 | Device and method for unsealing restrictor through eccentric vibration |
| CN114809970A (en) * | 2022-04-18 | 2022-07-29 | 中国石油化工股份有限公司 | Coiled tubing built-in hanger fisher and method for shale gas well sand jam |
-
2010
- 2010-12-10 CN CN2010206710073U patent/CN201883977U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527128A (en) * | 2012-07-04 | 2014-01-22 | 中国石油天然气股份有限公司 | Fishing tool for natural gas extraction downhole throttle device and operation method of fishing tool |
| CN103527128B (en) * | 2012-07-04 | 2016-03-09 | 中国石油天然气股份有限公司 | Natural gas extraction underground restrictor fishing tool and method of operating thereof |
| CN107420062A (en) * | 2017-08-14 | 2017-12-01 | 中国石油大学(华东) | A kind of bumper jar for continuous pipe unfreezing |
| CN108590559A (en) * | 2018-07-12 | 2018-09-28 | 长江大学 | A kind of down-hole fishing device |
| CN108590559B (en) * | 2018-07-12 | 2024-03-22 | 长江大学 | Underground fishing device |
| CN112943142A (en) * | 2021-01-12 | 2021-06-11 | 中国石油天然气股份有限公司 | Device and method for unsealing restrictor through eccentric vibration |
| CN114809970A (en) * | 2022-04-18 | 2022-07-29 | 中国石油化工股份有限公司 | Coiled tubing built-in hanger fisher and method for shale gas well sand jam |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110629 |
|
| CX01 | Expiry of patent term |