CN203081382U - Releasable fishing socket - Google Patents
Releasable fishing socket Download PDFInfo
- Publication number
- CN203081382U CN203081382U CN 201220634939 CN201220634939U CN203081382U CN 203081382 U CN203081382 U CN 203081382U CN 201220634939 CN201220634939 CN 201220634939 CN 201220634939 U CN201220634939 U CN 201220634939U CN 203081382 U CN203081382 U CN 203081382U
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- China
- Prior art keywords
- cylindrical shell
- ball
- fishing
- seat
- inclined hole
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- Expired - Lifetime
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Abstract
The utility model discloses a releasable fishing socket which comprises a socket body. An inner hole of the socket body is a big-end-down conical hole. Three ball seats which are evenly distributed along the circumference are arranged inside the socket body. An inclined hole is formed in each ball seat. A steel ball and springs are arranged inside each inclined hole. The lower hole diameter of each inclined hole is smaller than the diameter of each steel ball. A plug is arranged at an upper opening of each inclined hole. A rotating seat corresponding to the ball seats is arranged inside the portion, below the ball seats, of the socket body. A reset spring is arranged below the rotating seat. A spring seat which is connected with the socket body in a threaded mode is arranged at the bottom of the reset spring. A clamping key is arranged at the position, where the gap of the rotating seat is located, of the inner wall of the socket body. The aims of fishing and releasing are achieved only through simple dropping and lifting, and therefore operations are simple. The extension strength of the structure is the largest extension strength of the socket body and much larger than the extension strength of an original shearing pin, probability of new accidents during a fishing process is reduced, performance is reliable, and the whole fishing process is simple, smooth, reliable, time-saving and money-saving.
Description
Technical field
The utility model relates to a kind of reversible fishing socket, belongs to drilling well fishing tool technical field
Background technology
Along with the continuous development of petroleum and natural gas production technique, drilling depth is constantly deepened, and this just causes down-hole accident frequent and complicated more.It is commonplace occurring the casing failure accident in the well cementation process, because down-hole accident is very big to the work influence of drilling well, well cementation, well workover, endanger also very dark, if deal with improperly, length not only consuming time, loss is big, even causes the oil gas well to be scrapped, so the sleeve pipe fishing tool is the instrument of every mouthful of well indispensability.
Three ball fishing sockets are fishing tools commonly used at present, and three ball fishing sockets comprise cylindrical shell, and the endoporus of cylindrical shell is up-small and down-big taper hole; Be provided with 3 ball seats that are uniformly distributed along the circumference in the cylindrical shell, ball seat is through cutting off and cylindrical shell riveted joint, and ball seat is provided with inclined hole, is provided with steel ball and spring in the inclined hole, and the following aperture of inclined hole is less than the diameter of steel ball, the inclined hole screw plug that is provided with suitable for reading.During fishing, by drill string three ball fishing sockets are put to the down-hole, steel ball blocks the box cupling lower edge and will pull out with the sleeve pipe (being commonly called as fish) of box cupling, can't pick up when need discharging fish when the sleeve pipe of band box cupling is stuck, must strengthen and lift tonnage and reach to cause to cut off and cut off, make ball seat descending and radially magnify, just can discharge the sleeve pipe of band box cupling along cylindrical shell.
There is following defective in existing three ball fishing sockets:
1, after fishing socket uses, cut off and be out of shape or cut off, cutting off just of must more renewing can reuse: since cut off diameter be in accordance with regulations shearing force design and link together with urceolus and ball seat interference fit, so can not reload at the foramen primum place and cut off use, must need redrilling to upgrade, most of drilling teams scene does not have process equipment can only transport the servicing center back, increases many unnecessary transportations and maintenance cost.
2, when once salvaging when unsuccessful, can only go up bailer and cut off to cut off and withdraw from fishing, other fishing tools are salvaged heavily down, have not only increased the number of times that makes a trip, and lose time and expense, and have increased the probability of salvaging difficulty and new accident taking place.
3, existing three ball fishing sockets can not cooperate bumper jar to use, and can not bear bumper jar huge impact power because cut off, so can only be used to salvage the fish with the level that is not stuck.
4, unstable properties:, often be difficult to reach designing requirement because the tonnage of cutting off that cuts off is subjected to influences such as material, heat treatment, roughness, fit tolerance, stressing conditions.
5, it is big to cut off design difficulty: cut off and designed conference and cause not salvage when fish need withdraw from and can not cut off, can't withdraw from instrument, cut off the too small meeting of design and cause fish not pick up cutting off being cut off.
Summary of the invention
The purpose of this utility model is, a kind of reversible fishing socket is provided.Be used to sleeve pipe, oil pipe or the salvaging of the disconnected bar (or being referred to as fish) of step is arranged, to overcome the deficiency that existing three ball fishing sockets exist with box cupling.
The technical solution of the utility model:
A kind of reversible fishing socket comprises cylindrical shell, and the endoporus of cylindrical shell is up-small and down-big taper hole; Be provided with 3 ball seats that are uniformly distributed along the circumference in the cylindrical shell, ball seat is provided with inclined hole, is provided with steel ball and spring in the inclined hole, and the following aperture of inclined hole is less than the diameter of steel ball, the inclined hole screw plug that is provided with suitable for reading; Be provided with the rotating seat corresponding with ball seat in the cylindrical shell of described ball seat below, the rotating seat below is provided with back-moving spring, and the back-moving spring bottom is provided with the spring base that is spirally connected with cylindrical shell; The cylinder inboard wall of 3 rotating seat gap locations is provided with the card key.
In the aforementioned fishing socket, described card key top is the inclined-plane.
In the aforementioned fishing socket, described ball seat bottom is provided with ratchet.
In the aforementioned fishing socket, the top of described rotating seat is provided with helical teeth.
In the aforementioned fishing socket, be provided with positive stop lug boss in the endoporus at described cylindrical shell top.
In the aforementioned fishing socket, described cylindrical shell upper end is spirally connected through top connection and suspension ring joint.
Compared with prior art, the utlity model has following advantage: dismounting and easy to maintenance, can directly on raised platform around a well, carry out, saved a large amount of freights and time.Can repeatedly use: using only needs simple the cleaning later, and if any damage, it is convenient to change component, need not special tool, welding etc.Can be used with bumper jar: stuck during when fish in the shaft bottom, can start bumper jar and carry out the unfreezing operation, increase fishing success ratio greatly and salvage efficient.Simple to operate: only need by simply transfer, on carry and can realize the purpose of salvaging and discharging.Dependable performance: the tensile strength of this structure is the maximum tensile strength of cylindrical shell, is far longer than the former tensile strength that cuts off, and has reduced the probability that occurs new accident in the salvaging process.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the partial structurtes schematic diagram of existing three ball fishing sockets;
Fig. 3 is the schematic diagram of band step fish;
Fig. 4 is a schematic diagram of salvaging band step fish with three ball fishing sockets;
Fig. 5 is the schematic diagram of steel ball of the present utility model when being stuck in the box cupling lower edge;
Fig. 6 is that the card key is stuck in the schematic diagram in the ratchet of ball seat;
Fig. 7 is the schematic diagram of rotating seat when ball seat is pushed away the card key;
Fig. 8 is that the card key is by the up schematic diagram in gap between two ball seats.
Being labeled as among the figure: 1-suspension ring joint, 2-positive stop lug boss, 3-top connection, 4-card key, 5-cylindrical shell, 6-spring base, 7-back-moving spring, 8-rotating seat, 9-ball seat, 10-steel ball, 11-spring, 12-screw plug, 13-inclined hole, 14-ratchet, 15-helical teeth, 16-cut off, 17-box cupling, 18-sleeve pipe.
The specific embodiment.
The utility model is described in further detail below in conjunction with accompanying drawing, but not as to any restriction of the present utility model.
A kind of reversible fishing socket, as shown in Figure 1.Comprise cylindrical shell 5, the endoporus of cylindrical shell 5 is up-small and down-big taper hole; Be provided with 3 ball seats 9 that are uniformly distributed along the circumference in the cylindrical shell 5, ball seat 9 is provided with inclined hole 13, is provided with steel ball 10 and spring 11 in the inclined hole 13, and the following aperture of inclined hole 13 is less than the diameter of steel ball 10, inclined hole 13 screw plugs 12 that are provided with suitable for reading; Described ball seat 9 bottoms are provided with ratchet 14, are provided with 3 rotating seats 8 corresponding with ball seat 9 in the cylindrical shell 5 of ball seat 9 belows, and the top of rotating seat 8 is provided with helical teeth 15.3 rotating seat 8 belows are provided with back-moving spring 7, and back-moving spring 7 bottoms are provided with the spring base 6 that is spirally connected with cylindrical shell 5; Cylindrical shell 5 inwalls of 3 rotating seat 8 gap locations are provided with card key 4, and card key 4 tops are the inclined-plane.Be provided with positive stop lug boss 16 in the endoporus at described cylindrical shell 5 tops.Cylindrical shell 5 upper ends are spirally connected through top connection 3 and suspension ring joint 1.
The utility model is when carrying out fishing, and is descending along up-small and down-big cylindrical shell 5 endoporus by the card key 4 restriction ball seat assemblies that are located on cylindrical shell 5 inwalls, finishes fishing; When needs charge releasing belt step fish, remove the restriction of 4 pairs of ball seat assemblies of card key by the elasticity rotating seat, make the ball seat assembly finish expansion action charge releasing belt step fish along up-small and down-big cylindrical shell 5 endoporus are descending.Described band step fish is disconnected band box cupling sleeve pipe or the oil pipe that drops on the down-hole, or drilling rod with the level or device for subsurface measuring or instrument.Described by be located at card key 4 restriction ball seat assemblies on cylindrical shell 5 inwalls along up-small and down-big cylindrical shell 5 endoporus the ball seat assembly described in descending, be included in 3 ball seats 9 that are uniformly distributed along the circumference in the cylindrical shell 5, each ball seat 9 bottom is equipped with ratchet 14; The inwall of cylindrical shell 5 is provided with 3 card keys 4 that are uniformly distributed along the circumference, card key 4 tops are the inclined-plane, carry on the fishing when boring, and the inclined-plane of card key 4 cooperates with ratchet 14, key 4 heads on the ball seat assembly and cylindrical shell 5 moves up synchronously by blocking, to realize that restriction ball seat assembly is along the descending purpose of cylindrical shell 5 endoporus.Described by the elasticity rotating seat described in the restriction of 4 pairs of ball seat assemblies of elasticity rotating seat releasing card key, be included in 8,3 rotating seat 8 belows of 3 rotating seats that are uniformly distributed along the circumference in the cylindrical shell 5 and be provided with back-moving spring 7; When needs charge releasing belt step fish, transfer drill string earlier, when drill string is descending, 3 rotating seats 8 under the effect of back-moving spring 7, head on the ball seat assembly can not with cylindrical shell 5 DL synchronizations, card key 4 on cylindrical shell 5 inwalls is then along with cylindrical shell 5 is descending together, after card key 4 had been removed restriction to the ball seat assembly, helical teeth 15 drove the rotation of ball seat assemblies on the rotating seat 8, makes the just gap location between two ball seats 9 of card key 4; Carry drill string then, card key 4 is up from the gap between two ball seats 9, and the relative cylindrical shell 5 of restriction that makes the ball seat assembly break away from card key 4 is moved downward to the enlarged diameter section of cylindrical shell 5, finishes expansion action charge releasing belt step fish.
Main improvement explanation of the present utility model
The utility model mainly is the improvement to existing three ball fishing sockets, and Fig. 2 is the partial structurtes schematic diagram of existing three ball fishing sockets, comprises cylindrical shell 5, and the endoporus of cylindrical shell 5 is up-small and down-big taper hole; Be provided with 3 ball seats 9 that are uniformly distributed along the circumference in the cylindrical shell 5, ball seat 9 through cut off 16 with cylindrical shell riveted joint, ball seat 9 is provided with inclined hole 13, is provided with steel ball 10 and spring 11 in the inclined hole 13, the following aperture of inclined hole 13 is less than the diameter of steel ball 10.Three ball fishing sockets are mainly used in the salvaging band step fish of breaking in the down-hole as shown in Figure 3.During fishing, as shown in Figure 4, by drill string three ball fishing sockets are put to the down-hole, when cylindrical shell 5 entangles sleeve pipe 18 and moves down, steel ball 10 touches the upper edge of box cupling 17 earlier, because the active force that box cupling is applied on the steel ball 10 makes progress, and steel ball 10 can be pushed in the inclined hole 13, comes downwards to the lower edge of box cupling 17 smoothly.But when cylindrical shell 5 moves up shown in the arrow among Fig. 4, because the power that is applied on the steel ball 10 is downward, steel ball 10 can not be withdrawn in the inclined hole 13, steel ball 10 blocks box cupling 17 lower edges and will pull out with the sleeve pipe of box cupling, can't pick up when need discharging fish when the sleeve pipe of band box cupling is stuck, must strengthen and lift tonnage and reach to cause and cut off 16 and cut off, make ball seat 9 come downwards to enlarged diameter section along cylindrical shell 5, ball seat 9 radially magnifies the sleeve pipe that just can discharge the band box cupling.Existingly there is a following defective: after fishing socket uses, cut off and be out of shape or cut off, cutting off just of must more renewing can reuse: since cut off diameter be in accordance with regulations shearing force design and link together with urceolus and ball seat interference fit, so can not reload at the foramen primum place and cut off use, must need redrilling to upgrade, most of drilling teams scene does not have process equipment can only transport the servicing center back, increases many unnecessary transportations and maintenance cost.When once salvaging when unsuccessful, can only go up bailer and cut off to cut off and withdraw from fishing, other fishing tools are salvaged heavily down, have not only increased the number of times that makes a trip, and lose time and expense, and have increased the probability of salvaging difficulty and new accident taking place.Existing three ball fishing sockets can not cooperate bumper jar to use, and can not bear bumper jar huge impact power because cut off, so can only be used to salvage the sleeve pipe of the band box cupling that is not stuck.Unstable properties:, often be difficult to reach designing requirement because the tonnage of cutting off that cuts off is subjected to influences such as material, heat treatment, roughness, fit tolerance, stressing conditions.It is big to cut off design difficulty: cut off and designed conference and cause not salvage when fish need withdraw from and can not cut off, can't withdraw from instrument, cut off the too small meeting of design and cause fish not pick up cutting off being cut off.
The utility model is the improvement of carrying out at the above-mentioned defective of existing three ball fishing sockets.Specifically done following improvement as shown in Figure 1:
1, cancelled and existingly cut off 16, be welded with three uniform card keys 4 on cylindrical shell 5 inwalls, card key 4 tops are the inclined-plane.
2, ratchet 14 shapes are processed in the bottom that will have ball seat 9 now.
3, set up three rotating seats that are uniformly distributed along the circumference 8 below ball seat 9, helical teeth 15 shapes are processed at rotating seat 8 tops.
4, set up back-moving spring 7 below rotating seat 8, back-moving spring 7 bottoms spin through spring base and cylindrical shell 5 lower ends.
Through after the above-mentioned improvement, having overturned existing three ball fishing sockets must cut off or pitching is suppressed and waited the mode that discharges fish by cutting off, make whole salvaging process simple more, smooth, reliable, save time, economical.
The course of work of the present utility model and principle
When the fish that has step is broken in the shaft bottom, be lowered to fishing socket of the present utility model by drill string, as shown in Figure 5, when fishing socket is put into well from top to bottom, steel ball 10 is met the contact of box cupling 17 top edges earlier, steel ball 10 can be headed in the inclined hole 13 of ball seat 9, crosses box cupling 17 back steel balls 10 and can automatic ejection block box cupling 17 lower limbs.Carry drill string on this moment, welding is that card key 4 on the cylindrical shell 5 is along with cylindrical shell is up, the inclined-plane at card key 4 tops is with after the inclined-plane of the ratchet 14 of ball seat 9 bottoms contacts, component impels ball seat 9 rotations, as shown in Figure 6, card key 4 is stuck in the ratchet 14 of ball seat 9, and the restriction that ball seat 9 is subjected to fish can not make progress away, carries fishing socket in the continuation and can pull fish out.
When fish can't be pulled out, in the time of need withdrawing from fishing socket, as shown in Figure 7, only need transfer fishing socket, this moment, the screen resilience of back-moving spring 7 can upwards push away rotating seat 8, and rotating seat 8 makes progress ball seat 9 pushing out card keys 4, and makes ball seat 9 rotate to Fig. 8 state; And then on carry fishing socket, card key 4 is up with cylindrical shell 5, card key 4 enters the gap between two ball seats 9, carries fishing socket in the continuation, ball seat 9 relative cylindrical shells 5 are walked downwards because cylindrical shell 5 has tapering, ball seat 9 descending processes can swell, thereby the release fish.If think to salvage once more after discharging, need not to take out drill string, as long as by the above-mentioned steps repetitive operation.If the fish card is too tight, can uses bumper jar will shake Song Houzai and salvage.Therefore fishing socket of the present utility model can be salvaged the fish that many original fishing sockets can't be salvaged, and down-hole accident is solved faster.
Claims (6)
1. a reversible fishing socket comprises cylindrical shell (5), and the endoporus of cylindrical shell (5) is up-small and down-big taper hole; Be provided with 3 ball seats (9) that are uniformly distributed along the circumference in the cylindrical shell (5), ball seat (9) is provided with inclined hole (13), be provided with steel ball (10) and spring (11) in the inclined hole (13), the following aperture of inclined hole (13) is less than the diameter of steel ball (10), inclined hole (13) screw plug (12) that is provided with suitable for reading; It is characterized in that: be provided with the rotating seat (8) corresponding with ball seat (9) in the cylindrical shell (5) of described ball seat (9) below, rotating seat (8) below is provided with back-moving spring (7), and back-moving spring (7) bottom is provided with the spring base (6) that is spirally connected with cylindrical shell (5); Cylindrical shell (5) inwall of 3 rotating seats (8) gap location is provided with card key (4).
2. according to the described fishing socket of claim 1, it is characterized in that: described card key (4) top is the inclined-plane.
3. according to the described fishing socket of claim 1, it is characterized in that: described ball seat (9) bottom is provided with ratchet (14).
4. according to the described fishing socket of claim 1, it is characterized in that: the top of described rotating seat (8) is provided with helical teeth (15).
5. according to the described fishing socket of claim 1, it is characterized in that: be provided with positive stop lug boss (2) in the endoporus at described cylindrical shell (5) top.
6. according to the described fishing socket of claim 1, it is characterized in that: described cylindrical shell (5) upper end is spirally connected through top connection (3) and suspension ring joint (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220634939 CN203081382U (en) | 2012-11-27 | 2012-11-27 | Releasable fishing socket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220634939 CN203081382U (en) | 2012-11-27 | 2012-11-27 | Releasable fishing socket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203081382U true CN203081382U (en) | 2013-07-24 |
Family
ID=48827232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220634939 Expired - Lifetime CN203081382U (en) | 2012-11-27 | 2012-11-27 | Releasable fishing socket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203081382U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775016A (en) * | 2012-11-27 | 2014-05-07 | 贵州高峰石油机械股份有限公司 | Salvage method for broken and fallen drilling rod with steps and salvage barrel used in salvage method |
| CN108952614A (en) * | 2018-08-01 | 2018-12-07 | 西南石油大学 | A kind of ratchet type down-hole fishing device |
-
2012
- 2012-11-27 CN CN 201220634939 patent/CN203081382U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775016A (en) * | 2012-11-27 | 2014-05-07 | 贵州高峰石油机械股份有限公司 | Salvage method for broken and fallen drilling rod with steps and salvage barrel used in salvage method |
| CN103775016B (en) * | 2012-11-27 | 2016-04-27 | 贵州高峰石油机械股份有限公司 | A kind of Refloatation method with step fish and fishing socket used |
| CN108952614A (en) * | 2018-08-01 | 2018-12-07 | 西南石油大学 | A kind of ratchet type down-hole fishing device |
| CN108952614B (en) * | 2018-08-01 | 2020-08-11 | 西南石油大学 | Ratchet type is fishing device in pit |
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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: 20130724 |
|
| CX01 | Expiry of patent term |