CN204140011U - Reversible back-off dipper - Google Patents
Reversible back-off dipper Download PDFInfo
- Publication number
- CN204140011U CN204140011U CN201420585202.2U CN201420585202U CN204140011U CN 204140011 U CN204140011 U CN 204140011U CN 201420585202 U CN201420585202 U CN 201420585202U CN 204140011 U CN204140011 U CN 204140011U
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- CN
- China
- Prior art keywords
- slips
- cylindrical shell
- limit base
- fish
- dipper
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
Reversible back-off dipper, comprise: top connection (1), cylindrical shell (6) and guide shoe (10), taper hole is arranged at cylindrical shell (6) bottom, taper hole inside is provided with 3 operating keys (7), cylindrical shell (6) top is provided with limit base (4), limit base (4) is connected with 3 slips (5), and the top of limit base (4) is provided with spring (2); In cylindrical shell (6) upper inside wall, uniform 3 keys, control the position of limit base (4); 3 keys on operating key (7) and 3 lobe cross-distribution of slips (5); There is the inclination angle of matching slips (5) lower end with operating key (7) upper end.After imposing left-hand torque to back-off dipper, cylindrical shell (6) drives operating key (7) and slips (5) together to rotate, and left-hand torque is passed to the fish that slips (5) clamps, realizes carrying out back-off to fish.Under hit drill string, the conical surface of cylindrical shell (6) and slips (5) is thrown off, and carry cylindrical shell (6) on after dextrorotation, the inclination angle of slips (5) lower end enters in the inclination angle of operating key (7) upper end, such that slips (5) is swollen outward unclamps fish.
Description
Technical field
The utility model relates to the outer fishing tool for the treatment of down-hole accident in Process of Oil Well Drilling, is specially a kind ofly can to exit again the reversible back-off dipper of fish by back-off.
Background technology
The fishing tool of usual structure, only has back-off function or only has and can move back function.And the salvaging of some fish, need first to connect after screw thread is opened and salvaged again, meet card once salvage or run into other faults, fish need be exited withdrawal fishing tool.Reversible back-off dipper has back-off and can move back two kinds of functions.
Chinese patent CN201320731257.5 discloses a kind of releasable fishing socket, realizes moving back of dipper, but can not realize back-off simultaneously by parts such as L shape groove and position-limitting pins.
Chinese patent CN201057007Y discloses one can back-off loose-leaf dipper, can carry out back-off process, but can not realize moving back simultaneously to fish.
Chinese patent CN201439695U discloses a kind of button type back-off dipper, can realize moving back while back-off, but its reversing torque is little, and dynamics is limited, and dipper introducing has certain difficulty.
Summary of the invention
In order to overcome above-mentioned shortcoming, the utility model provides a kind of reversible back-off dipper, and reversing torque is large, does not need rotary drill column when salvaging fish, and it is simple to operate to move back fish.
The utility model is realized by following scheme:
Reversible back-off dipper, comprise: top connection, cylindrical shell and guide shoe, described cylindrical shell two ends are screw thread closely-pitched, its top is threaded with described top connection, its underpart is threaded with described guide shoe, there is staged circular hole described top connection inside, described cylindrical shell is provided with endoporus, described endoporus bottom is bellmouth, described bellmouth inwall is fixed with 3 operating keys, described 3 operating keys stretch along the conical surface, described taper hole is divided into 3 arc inner conical surfaces, there is leaning angle the upper surface of described 3 operating keys, the lower end of described 3 operating keys is connected, its lower end is connected and is partially submerged into the shoulder place that described bellmouth lower port and described cylinder inboard wall formed,
Described cylindrical shell internal upper part is provided with limit base, described limit base has annular groove be divided into upper and lower two parts, and the outer cylinder surface of described limit base top, bottom is respectively equipped with 3 boss; Hang the slips of 3 pieces of sheets in described annular groove, described slips is fixedly connected with 3, described annular groove top boss by screw respectively, and described slips endoporus is concentric with described cylindrical shell, described 3 slips and 3 operating key cross-distribution; Described cylindrical shell upper inside wall uniform 3 keys, for controlling the position of limit base, limit base along cylindrical shell axis rotation 65 degree of angles, also can slide up and down by 3 keyways along cylindrical shell top; Through hole is had in the middle of described limit base;
Described slips outer wall bottom is provided with male cone (strobilus masculinus), matches with described cylindrical shell inner conical surface; Described slips lower end is provided with inclination angle, matches with inclination angle, described operating key upper surface; Described slips inwall has zigzag to salvage tooth; The upper surface of described limit base is provided with spring, and the upper end of described spring and the shoulder of described top connection inwall offset;
Described guide shoe end face circular arc is spiral shape, has 30 degree of angle of climbs, and its end face is inclined-plane.
Further, the upper end of described guide shoe is provided with seal receptacle, and the upper end of described seal receptacle is provided with sealing ring, and the upper end of described sealing ring connects with the lower end of described operating key.
Further, described slips adopts carbo-nitriding technical finesse.
Further, the upper end of described top connection is provided with internal thread, can connect left-hand screw drill pipe.
The beneficial effects of the utility model are:
The utility model has following characteristics:
(1) guide shoe adopts lipped configuration, and end face circular arc is spiral shape, has 30 degree of angle of climbs, is conducive to introducing and the location of fish; Its end face is inclined-plane, is conducive to snatch fish;
(2) guide shoe upper end position has sealing ring, and fish can seal fish outer annular space after introducing;
(3) slips adopts carbo-nitriding, the high hardness in surface and anti-wear performance engagement with the fish firmly, and the tough performance that core is good makes fish enter smoothly and leans on its elastic force to produce certain clamping force to fish;
(4) utilize operating key to transmit reversing torque, reversing torque is large;
(5), after inclination angle, slips lower end coordinates with inclination angle, operating key upper end, can, by outer for slips swollen, slips be made to unclamp fish;
(6) rotary drill column is not needed when salvaging fish;
(7) only need down to hit drilling tool when moving back fish, then dextrorotation is on one side carried, can fish be exited.
accompanying drawing illustrates:
Fig. 1 is reversible back-off dipper structure chart;
Fig. 2 is reversible back-off dipper A-A sectional view;
Fig. 3 is reversible back-off dipper B-B sectional view;
Fig. 4 is the drawing of salvaging state local controlled;
Fig. 5 is that the drawing of fish state local controlled is moved back in preparation;
Fig. 6 is for moving back the drawing of fish state local controlled.
detailed description of the invention:
Number in the figure 1. top connection; 2. spring; 3. screw; 4. limit base; 5. slips; 6. cylindrical shell; 7. operating key; 8. sealing ring; 9. seal receptacle; 10. guide shoe.
Reversible back-off dipper is made up of top connection 1, spring 2, screw 3, limit base 4, slips 5, cylindrical shell 6, operating key 7, sealing ring 8, seal receptacle 9, guide shoe 10.Operating key 7, sealing ring 8, seal receptacle 9 load cylindrical shell 6 lower end successively, are connected into guide shoe 10; Slips 5, screw 3, limit base 4 load from cylindrical shell 6 upper end after having assembled, and make 3 lobe cross-distribution of 3 keys on operating key 7 and slips 5, reinstall spring 2, be connected into top connection 1.
Cylindrical shell 6 two ends are screw thread closely-pitched, its top is threaded with top connection 1, its underpart is threaded with guide shoe 10, there is staged circular hole top connection 1 inside, cylindrical shell 6 is provided with endoporus, endoporus bottom is bellmouth, bellmouth inwall is fixed with 3 operating keys 7,3 operating keys 7 stretch along the conical surface, taper hole is divided into 3 arc inner conical surfaces, there is leaning angle 40 degree the upper surface of 3 operating keys 7, and the lower end of 3 operating keys 7 is connected, and its lower end is connected and is partially submerged into the shoulder place that bellmouth lower port and cylindrical shell 6 inwall formed; 3 operating keys 7 are used for transmitting torque, and wherein the leaning angle of 40 degree is used to restriction slips.
Cylindrical shell 6 internal upper part is provided with limit base 4, limit base 4 has annular groove be divided into upper and lower two parts, and the outer cylinder surface of limit base 4 top, bottom is respectively equipped with 3 boss; Hang the slips 5 of 3 pieces of sheets in annular groove, slips 5 is fixedly connected with by 3 boss in screw and annular groove top respectively, and slips 5 endoporus is concentric with cylindrical shell 6,3 slips 5 and 3 operating key 7 cross-distribution; Cylindrical shell 6 upper inside wall uniform 3 keys, control the position of limit base 4, limit base 4 along cylindrical shell 6 axis rotation 65 degree of angles, also can slide up and down along 3, cylindrical shell 6 top keyway, and slips 5 also can do these two kinds motions thereupon; Having through hole in the middle of limit base 4 can as circulation canal.
Slips 5 outer wall bottom is provided with male cone (strobilus masculinus), matches with cylindrical shell 6 inner conical surface; Slips 5 lower end is provided with inclination angle, matches with inclination angle, operating key 7 upper surface; Slips 5 inwall has zigzag to salvage tooth; The upper surface of limit base 4 is provided with spring 2, and the upper end of institute's spring 2 and the shoulder of top connection 1 inwall offset; 3 slips 5 are tightly pressed in 3 arc conical surfaces by spring 2, and slips 5 and cylindrical shell 6 conical surface fit tightly.
Guide shoe 10 end face circular arc is spiral shape, has 30 degree of angle of climbs, and its end face is inclined-plane, is more conducive to introducing and the location of guide shoe.The upper end of guide shoe 10 is provided with seal receptacle 9, and the upper end of seal receptacle 9 is provided with sealing ring 8, and the upper end of sealing ring 8 connects with the lower end of operating key 7.The upper end of top connection 1 is provided with internal thread, can connect left-hand screw drill pipe.
Slips 5 adopts carbo-nitriding technical finesse, and surface has high hardness and abrasion resistance, and core has good toughness.
operating principle:reversible back-off dipper salvaging and back-off operation in, when internal diameter be slightly less than fish external diameter slips contact fish time and cylindrical shell produce relative sliding, the slips conical surface and the cylindrical shell conical surface are thrown off.Cylindrical shell continues descending, and limit base withstands on top connection lower surface forces slips outer swollen, and fish is introduced.Stopping is transferred, and is produced clamping force, bite fish by the slips swollen to fish.Carry drilling tool then, cylindrical shell is up, and slips and the cylindrical shell conical surface are fitted, and slips clamping force increases, and the triangle tooth of slips is nipped fish outer wall, realizes salvaging.Impose left-hand torque, moment of torsion passes to slips by the key on cylindrical shell, and fish joint is released, and realizes back-off and salvages.If when need exit fish retrieving tool, by hitting under drilling tool, slips and the cylindrical shell conical surface are thrown off, dextrorotation cylindrical shell drives operating key and slips to rotate about 65 ° together, then dextrorotation is on one side carried, can exit fish.
the realization of back-off:with lip guide shoe, fish is introduced, sealing ring is utilized to seal fish outer annular space, the slips distending that the fish entered makes toughness good, fish is blocked by the clamping force of the salvaging tooth sharp-pointed by slips inside and the life of outer occipitoposterior position (of the fetus), slips and cylindrical shell are cone match, and lift power is larger then larger to the clamping force of fish generation.After imposing left-hand torque to back-off dipper, cylindrical shell drives operating key and slips together to rotate, and left-hand torque is passed to the fish of slips clamping, realizes carrying out back-off to fish.
the realization that can move back:there is the inclination angle of matching slips lower end with operating key upper end, and limit base can only rotate about 65 ° in cylindrical shell.When needs move back fish, under hit drill string, the conical surface of cylindrical shell and slips is thrown off, and carry cylindrical shell on after dextrorotation about 65 °, the inclination angle of slips lower end enters in the inclination angle of operating key upper end, such that slips is outer swollenly unclamps fish, then dextrorotation one side is carried and fish can be exited.
Claims (4)
1. reversible back-off dipper, comprise: top connection (1), cylindrical shell (6) and guide shoe (10), described cylindrical shell (6) two ends are screw thread closely-pitched, its top is threaded with described top connection (1), its underpart is threaded with described guide shoe (10), there is staged circular hole described top connection (1) inside
It is characterized in that:
Described cylindrical shell (6) is provided with endoporus, described endoporus bottom is bellmouth, described bellmouth inwall is fixed with 3 operating keys (7), described 3 operating keys (7) are stretched along the conical surface, described bellmouth is divided into 3 arc inner conical surfaces, there is leaning angle the upper surface of described 3 operating keys (7), and the lower end of described 3 operating keys (7) is connected, and its lower end is connected and is partially submerged into the shoulder place that described bellmouth lower port and described cylindrical shell (6) inwall formed;
Described cylindrical shell (6) internal upper part is provided with limit base (4), and described limit base (4) has annular groove to be divided into upper and lower two parts, and the outer cylinder surface of described limit base (4) top, bottom is respectively equipped with 3 boss; The slips (5) of 3 pieces of sheets is hung in described annular groove, described slips (5) is fixedly connected with 3, described annular groove top boss by screw respectively, described slips (5) endoporus is concentric with described cylindrical shell (6), described 3 slips (5) and 3 operating key (7) cross-distribution; Described cylindrical shell (6) upper inside wall uniform 3 keys, for controlling the position of limit base (4), limit base (4) along cylindrical shell (6) axis rotation 65 degree of angles, also can slide up and down along 3, cylindrical shell (6) top keyway; Through hole is had in the middle of described limit base (4);
Described slips (5) outer wall bottom is provided with male cone (strobilus masculinus), matches with described cylindrical shell (6) inner conical surface; Described slips (5) lower end is provided with inclination angle, matches with described operating key (7) inclination angle, upper surface; Described slips (5) inwall has zigzag to salvage tooth;
The upper surface of described limit base (4) is provided with spring (2), and the upper end of described spring (2) and the shoulder of described top connection (1) inwall offset;
Described guide shoe (10) is lipped configuration, and guide shoe (10) end face circular arc is spiral shape, has 30 degree of angle of climbs, and its end face is inclined-plane.
2. reversible back-off dipper according to claim 1, it is characterized in that: the upper end of described guide shoe (10) is provided with seal receptacle (9), the upper end of described seal receptacle (9) is provided with sealing ring (8), and the upper end of described sealing ring (8) connects with the lower end of described operating key (7).
3. reversible back-off dipper according to claim 1, is characterized in that: described slips (5) adopts carbo-nitriding technical finesse.
4. reversible back-off dipper according to claim 1, is characterized in that: the upper end of described top connection (1) is provided with internal thread, can connect left-hand screw drill pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420585202.2U CN204140011U (en) | 2014-10-11 | 2014-10-11 | Reversible back-off dipper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420585202.2U CN204140011U (en) | 2014-10-11 | 2014-10-11 | Reversible back-off dipper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204140011U true CN204140011U (en) | 2015-02-04 |
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ID=52416704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420585202.2U Expired - Fee Related CN204140011U (en) | 2014-10-11 | 2014-10-11 | Reversible back-off dipper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204140011U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105401902A (en) * | 2015-12-22 | 2016-03-16 | 东营和辉石油技术有限责任公司 | Cable salvage tool used in oil and gas well |
| CN108518193A (en) * | 2018-05-14 | 2018-09-11 | 中国石油天然气集团公司 | Light pipe shape junk unfreezing fishing device |
| CN110173227A (en) * | 2019-05-31 | 2019-08-27 | 南智（重庆）能源技术有限公司 | The small latus rectum blocking removal technology of oil/gas well tubing and casing |
| CN110952946A (en) * | 2019-11-27 | 2020-04-03 | 淮安市井神钻采机具有限公司 | Fishing barrel capable of catching fish strongly |
| CN111677473A (en) * | 2020-03-02 | 2020-09-18 | 中煤科工集团西安研究院有限公司 | Rotary overshot for underground coal mine and overshot method |
| CN112049592A (en) * | 2020-10-20 | 2020-12-08 | 中国石油集团渤海钻探工程有限公司 | Returnable slip type casing tieback make-up connector |
-
2014
- 2014-10-11 CN CN201420585202.2U patent/CN204140011U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105401902A (en) * | 2015-12-22 | 2016-03-16 | 东营和辉石油技术有限责任公司 | Cable salvage tool used in oil and gas well |
| CN108518193A (en) * | 2018-05-14 | 2018-09-11 | 中国石油天然气集团公司 | Light pipe shape junk unfreezing fishing device |
| CN110173227A (en) * | 2019-05-31 | 2019-08-27 | 南智（重庆）能源技术有限公司 | The small latus rectum blocking removal technology of oil/gas well tubing and casing |
| CN110952946A (en) * | 2019-11-27 | 2020-04-03 | 淮安市井神钻采机具有限公司 | Fishing barrel capable of catching fish strongly |
| CN111677473A (en) * | 2020-03-02 | 2020-09-18 | 中煤科工集团西安研究院有限公司 | Rotary overshot for underground coal mine and overshot method |
| CN111677473B (en) * | 2020-03-02 | 2022-05-13 | 中煤科工集团西安研究院有限公司 | Rotatable fishing barrel used under coal mine and fishing method thereof |
| CN112049592A (en) * | 2020-10-20 | 2020-12-08 | 中国石油集团渤海钻探工程有限公司 | Returnable slip type casing tieback make-up connector |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20170727 Granted publication date: 20150204 |
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| PP01 | Preservation of patent right | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20200727 Granted publication date: 20150204 |
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| PD01 | Discharge of preservation of patent | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150204 Termination date: 20171011 |
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| CF01 | Termination of patent right due to non-payment of annual fee |