CN108590559B - Underground fishing device - Google Patents
Underground fishing device Download PDFInfo
- Publication number
- CN108590559B CN108590559B CN201810761414.4A CN201810761414A CN108590559B CN 108590559 B CN108590559 B CN 108590559B CN 201810761414 A CN201810761414 A CN 201810761414A CN 108590559 B CN108590559 B CN 108590559B
- Authority
- CN
- China
- Prior art keywords
- pin
- bearing
- gripper
- sliding
- hole
- Prior art date
- 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.)
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Links
- 230000006835 compression Effects 0.000 claims description 19
- 238000007906 compression Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 4
- 238000005553 drilling Methods 0.000 abstract description 17
- 210000002445 nipple Anatomy 0.000 abstract description 9
- 239000003208 petroleum Substances 0.000 abstract description 3
- 210000004907 gland Anatomy 0.000 abstract description 2
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 239000012530 fluid Substances 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/12—Grappling tools, e.g. tongs or grabs
- E21B31/18—Grappling tools, e.g. tongs or grabs gripping externally, e.g. overshot
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Marine Sciences & Fisheries (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Fishing Rods (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to a downhole salvaging device; belongs to the technical field of petroleum drilling and fishing tools. The upper joint is installed through middle nipple joint screw thread on the direction short joint, and fixed mounting has the bearing dish in the middle nipple joint, is equipped with the bearing round pin on the bearing dish, is equipped with the slip lock sleeve on the bearing round pin, installs tongs articulated seat on the bearing round pin of slip lock sleeve's below through gland nut, has a plurality of tongs through the round pin axle equipartition on the circumference of tongs articulated seat. When the underground salvaging device works, the sliding locking sleeve slides downwards to press the handles to retract inwards, so that the tool to be salvaged is fully clamped, and the residual drilling tool in the well can be conveniently and timely lifted out, thereby greatly improving the salvaging reliability; solves the problem of property loss caused by the burying of the existing drilling tool. The underground salvaging device is simple in structure, reasonable in design and particularly suitable for salvaging underground drilling tools.
Description
Technical Field
The invention relates to a downhole salvaging device; belongs to the technical field of petroleum drilling and fishing tools.
Background
In petroleum drilling, the structure of stratum can not be determined in many times, the ground layer needs to be drilled heuristically, and the situation of blocking frequently occurs in certain well sections because the geological design is not consistent with the actual working condition; once the blocking situation occurs, underground accidents such as drill rod breakage, drill bit falling and the like are usually caused, if the residual drilling tool in the well cannot be lifted out in time, important drilling tools such as the drill bit, the impactor and the like are buried, and therefore great property loss is caused.
Disclosure of Invention
The invention aims at: the underground salvaging device is simple in structure, reasonable in design and capable of conveniently and timely lifting out the residual drilling tool in the well so as to avoid property loss caused by the fact that the drilling tool is buried.
The technical scheme of the invention is as follows:
the underground salvaging device comprises an upper joint, a middle nipple, a guide nipple, a bearing pin, a sliding locking sleeve and a gripper; the method is characterized in that: the upper joint is installed through middle nipple joint screw thread on the direction short joint, and fixed mounting has the bearing dish in the middle nipple joint, is equipped with the bearing round pin on the bearing dish, is equipped with the slip lock sleeve on the bearing round pin, installs tongs articulated seat on the bearing round pin of slip lock sleeve's below through gland nut, has a plurality of tongs through the round pin axle equipartition on the circumference of tongs articulated seat.
The lower end of the bearing pin is provided with an assembly hole, and a trigger push rod is arranged in the assembly hole through a C-shaped clamping ring.
The bearing pin at the top of the assembly hole is radially provided with a limiting pin hole, and a pin jack is arranged on the sliding locking sleeve corresponding to the limiting pin hole.
The limiting pin hole is internally provided with a limiting pin through a conical compression spring, one end of the limiting pin extends to the outer end of the limiting pin hole, and the limiting pin extending to the outer end of the limiting pin hole is in contact, insertion and connection with the pin insertion hole.
The trigger push rod is a T-shaped body, and the top of the trigger push rod is a slope.
The limiting pin is provided with a slope groove corresponding to the slope surface at the top of the trigger push rod, and the limiting pin is connected with the trigger push rod in a sliding contact manner through the slope groove.
And a limiting compression spring is arranged on the bearing pin between the movable locking sleeve and the bearing disc through a gasket.
The bottom of the gripper is in a hook shape, and a supporting piece is arranged between the gripper and the gripper hinging seat.
And a limiting buffer ring is arranged on the bearing pin above the gripper hinging seat.
The support piece consists of a slide bar, a support spring and a slide bar sleeve, the slide bar sleeve is fixedly arranged on the gripper hinging seat, the slide bar is slidably arranged in the slide bar sleeve, and one end of the slide bar is fixedly connected with the gripper; the sliding rod sleeve and the sliding rod are sleeved with a supporting spring.
The bearing plate is a cylinder, the center of the bearing plate is provided with a mounting hole, and the bearing plate at the periphery of the mounting hole is uniformly provided with liquid flow holes.
The beneficial effects of the invention are as follows:
when the underground salvaging device works, the sliding locking sleeve slides downwards to press the handles to retract inwards, so that the tool to be salvaged is fully clamped, and the residual drilling tool in the well can be conveniently and timely lifted out, thereby greatly improving the salvaging reliability; solves the problem of property loss caused by the burying of the existing drilling tool. The underground salvaging device is simple in structure, reasonable in design and particularly suitable for salvaging underground drilling tools.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic structural view of a load bearing tray of the present invention;
FIG. 3 is a schematic view of the structure of the gripper hinge seat of the present invention;
FIG. 4 is a schematic view of the trigger push rod of the present invention;
FIG. 5 is an enlarged schematic view of the structure of FIG. 1 at A;
FIG. 6 is a schematic view of a spacing pin according to the present invention;
FIG. 7 is a schematic side view of the spacing pin of the present invention;
FIG. 8 is an enlarged schematic view of the structure at B in FIG. 1;
FIG. 9 is a schematic view of the working state of the present invention;
fig. 10 is an enlarged schematic view of the structure at a in fig. 9.
In the figure: 1. the device comprises an upper joint, 2, a middle nipple, 3, a guide nipple, 4, a bearing pin, 5, a sliding locking sleeve, 6, a gripper, 7, a bearing disc, 8, a mounting hole, 9, a liquid flow hole, 10, a gasket, 11, a limiting compression spring, 12, a compression nut, 13, a gripper hinging seat, 14, a C-shaped clamping ring, 15, a trigger push rod, 16, a conical compression spring, 17, a limiting pin, 18, a slope groove, 19, a connecting lug, 20, a supporting piece, 21, a slide bar, 22, a supporting spring, 23, a slide bar sleeve, 24, a tool to be salvaged, 25 and a limiting buffer ring.
Detailed Description
The underground salvaging device comprises an upper joint 1, a middle pup joint 2, a guide pup joint 3, a bearing pin 4, a sliding locking sleeve 5 and a gripper 6; the upper joint 1 is arranged on the guide short joint 3 through the middle short joint 2 screw thread, and the bearing disc 7 is fixedly arranged in the middle short joint 2. The inner wall of the middle nipple 2 is provided with a bulge, the lower end face of the bearing disc 7 is in contact with the bulge, and the upper end face of the bearing disc 7 is in contact with the lower end face of the upper joint 1, so that the bearing disc 7 is clamped and fixed. The bearing plate 7 is a cylinder, the center position of the bearing plate 7 is provided with a mounting hole 8, and liquid flow holes 9 are uniformly distributed on the bearing plate 7 at the periphery of the mounting hole 8. The bearing plate 7 is provided with a bearing pin 4 through a mounting hole 8, the bearing pin 4 is provided with a sliding locking sleeve 5, the sliding locking sleeve 5 is a cup-shaped body, the central part of the sliding locking sleeve 5 is provided with a mounting connecting hole, and the sliding locking sleeve 5 is slidably mounted on the bearing pin 4 through the mounting connecting hole.
The bearing pin 4 between the movable locking sleeve 5 and the bearing disc 7 is provided with a limiting compression spring 11 through a gasket 10. The lower end of the bearing pin 4 is provided with an assembly hole (counter bore), and a trigger push rod 15 is arranged in the assembly hole through a C-shaped clamping ring 14. The trigger push rod 15 is a T-shaped body, and the top of the trigger push rod 15 is a slope. A limiting pin hole is radially formed in the bearing pin 4 at the top of the assembly hole, and the limiting pin hole is communicated with the assembly hole; the limiting pin hole is internally provided with a limiting pin 17 through a conical compression spring 16, and a pin jack is arranged on a mounting connection hole of the sliding locking sleeve 5 corresponding to the limiting pin hole. One end of the limiting pin 17 extends to the outer end of the limiting pin hole, the limiting pin 17 extending to the outer end of the limiting pin hole is in contact and inserted connection with the pin jack, and the locking and fixing of the sliding locking sleeve 5 on the bearing pin 4 are realized through the insertion of the limiting pin 17 in the pin jack.
The limit pin 17 is provided with a slope groove 18 corresponding to the slope surface at the top of the trigger push rod 15, and the trigger push rod 15 is connected with the limit pin 17 in a sliding contact manner through the matching of the slope surface at the top of the trigger push rod 15 and the slope groove 18. In the working process, under the extrusion action of the trigger push rod 15, the limit pin 17 can move in the limit pin hole, so that the limit pin can withdraw from the pin insertion hole, and the locking and fixing release of the sliding locking sleeve 5 on the bearing pin 4 is realized.
The bearing pin 4 below the sliding locking sleeve 5 is provided with a gripper hinging seat 13 through a compression nut 12, the gripper hinging seat 13 is a cylindrical body, 3 connecting lugs are uniformly distributed on the circumference of the gripper hinging seat 13 at 120 degrees, and the connecting lugs are provided with grippers 6 through pin shafts. The bottom of the gripper 6 is in a hook shape, and a supporting piece 20 is arranged between the gripper 6 and the gripper hinging seat 13.
The support piece 20 consists of a slide bar 21, a support spring 22 and a slide bar sleeve 23, wherein the slide bar sleeve 23 is fixedly arranged on the gripper hinging seat 13, the slide bar 21 is arranged in the slide bar sleeve 23 in a sliding manner, and one end of the slide bar 21 is fixedly connected with the gripper 6; the sliding rod sleeve 23 and the sliding rod 21 are sleeved with a supporting spring 22; the function of the slide bar sleeve 23 and the slide bar 21 is to provide a mounting base for the support spring 22 to keep the gripper 6 in a stretched position at all times, during operation the slide bar 21 can be extended and retracted in the slide bar sleeve 23 without leaving the inserted position of the slide bar 21 in the slide bar sleeve 23.
The C-shaped clamping ring 14 of the underground fishing device can prevent the trigger push rod 15 from slipping in the assembly hole. When the underground salvaging device salvages, the salvaging device is firstly lowered to the position corresponding to the well depth, at the moment, the salvaging device handle 6 is in the maximum open state, the sliding locking sleeve 5 and the bearing pin 4 are in the locking state, and the limiting compression spring 11 is in the compression energy storage state; continuing to lower the salvaging device, so that the upper end of the tool 24 to be salvaged contacts with the pushing disc at the lower end of the trigger push rod 15, thereby slowly pushing the trigger push rod 15 upwards along the assembly hole, and in the process, the top of the trigger push rod 15 is a slope; the limit pin 17 is provided with a slope groove 18 corresponding to the slope surface at the top of the trigger push rod 15, and the trigger push rod 15 is connected with the limit pin 17 in a sliding contact manner through the matching of the slope surface at the top of the trigger push rod 15 and the slope groove 18; in the process of triggering the push rod 15 to go upward, the slope surface groove 18 on the limit pin 17 is extruded through the slope surface at the top of the push rod, so that the limit pin 17 compresses the conical compression spring 16 and retracts in the limit pin hole, the end of the limit pin is withdrawn from the pin insertion hole, the locking state of the sliding locking sleeve 5 and the bearing pin 4 is released, and meanwhile, the compression energy storage state of the limit compression spring 11 is released.
At the same time, drilling fluid is injected through the upper joint 1, and acts on the sliding locking sleeve 5 through fluid holes 9 uniformly distributed on the bearing disc 7, and simultaneously the sliding locking sleeve 5 is cooperatively pushed to descend along the bearing pin 4 by the aid of the limiting compression springs 11. Until contacting with the limit buffer ring 25 arranged on the bearing pin 4 above the gripper hinging seat 13; the limiting buffer ring 25 is used for limiting the downward movement of the sliding locking sleeve 5.
Closing the drilling fluid; in the process of sliding the sliding locking sleeve 5 downwards, the lower end of the sliding locking sleeve 5 pushes (extrudes) three grippers 6 to simultaneously and gradually shrink and fold, the supporting piece 20 is simultaneously compressed in the process of shrinking and folding of the grippers 6, along with the downwards sliding of the sliding locking sleeve 5, the three grippers 6 grasp the convex part of the tool 24 to be salvaged through a hook at the bottom of the three grippers 6 in the process of shrinking and folding, so that the locking state of the grippers 6 and the tool 24 to be salvaged is realized, the locking state of the grippers 6 and the tool 24 to be salvaged is kept by a limiting compression spring 11, and the underground drilling tool can be salvaged by lifting the underground salvaging device.
The underground salvaging device is simple in structure and reasonable in design, the gripper 6 is pressed by the descending of the sliding locking sleeve 5 to shrink inwards so as to clamp the tool 2 to be salvaged, and the clamping state of the gripper 6 is kept by the limiting compression spring 11; thereby greatly improving the reliability of salvage; solves the property loss problem caused by the burying of the existing drilling tool.
Claims (4)
1. The underground salvaging device comprises an upper joint (1), a middle pup joint (2), a guide pup joint (3), a bearing pin (4), a sliding locking sleeve (5) and a gripper (6); the method is characterized in that: an upper joint (1) is arranged on the guide short joint (3) through a middle short joint (2) in a threaded manner, a bearing disc (7) is fixedly arranged in the middle short joint (2), a bearing pin (4) is arranged on the bearing disc (7), a sliding locking sleeve (5) is arranged on the bearing pin (4), a gripper hinging seat (13) is arranged on the bearing pin (4) below the sliding locking sleeve (5) through a compression nut (12), and a plurality of grippers (6) are uniformly distributed on the circumference of the gripper hinging seat (13) through pin shafts; the lower end of the bearing pin (4) is provided with an assembly hole, and a trigger push rod (15) is arranged in the assembly hole through a C-shaped clamping ring (14);
a limiting pin hole is radially formed in the bearing pin (4) at the top of the assembly hole, and a pin jack is formed in the sliding locking sleeve (5) corresponding to the limiting pin hole;
a limit pin (17) is arranged in the limit pin hole through a conical compression spring (16), one end of the limit pin (17) extends to the outer end of the limit pin hole, and the limit pin (17) extending to the outer end of the limit pin hole is connected with the pin jack in an inserting way;
the limiting pin (17) is provided with a slope groove (18) corresponding to the slope at the top of the trigger push rod (15), and the limiting pin (17) is connected with the trigger push rod (15) in a sliding contact manner through the slope groove (18);
a limit buffer ring (25) is arranged on the bearing pin (4) above the gripper hinging seat (13); the bottom of the gripper (6) is in a hook shape, and a supporting piece (20) is arranged between the gripper (6) and the gripper hinging seat (13);
the support piece (20) consists of a sliding rod (21), a support spring (22) and a sliding rod sleeve (23), the sliding rod sleeve (23) is fixedly arranged on the gripper hinging seat (13), the sliding rod (21) is arranged in the sliding rod sleeve (23) in a sliding manner, and one end of the sliding rod (21) is fixedly connected with the gripper (6); the sliding rod sleeve (23) and the sliding rod (21) are sleeved with a supporting spring (22).
2. A downhole fishing device according to claim 1, wherein: the trigger push rod (15) is a T-shaped body, and the top of the trigger push rod (15) is a slope.
3. A downhole fishing device according to claim 1, wherein: the limiting compression spring (11) is arranged on the bearing pin (4) between the sliding locking sleeve (5) and the bearing disc (7) through the gasket (10).
4. A downhole fishing device according to claim 1, wherein: the bearing plate (7) is a cylinder, the center of the bearing plate (7) is provided with a mounting hole (8), and liquid flow holes (9) are uniformly distributed on the bearing plate (7) at the periphery of the mounting hole (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810761414.4A CN108590559B (en) | 2018-07-12 | 2018-07-12 | Underground fishing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810761414.4A CN108590559B (en) | 2018-07-12 | 2018-07-12 | Underground fishing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108590559A CN108590559A (en) | 2018-09-28 |
| CN108590559B true CN108590559B (en) | 2024-03-22 |
Family
ID=63615348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810761414.4A Active CN108590559B (en) | 2018-07-12 | 2018-07-12 | Underground fishing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108590559B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109057737B (en) * | 2018-10-31 | 2023-08-22 | 长江大学 | Repeatedly operable underground fishing device |
| CN109751005B (en) * | 2019-03-06 | 2023-08-22 | 长江大学 | Repeatedly operable underground fishing tool |
| CN110331954B (en) * | 2019-06-05 | 2021-11-09 | 张希录 | Throwing and fishing device and using method thereof |
| CN112696167B (en) * | 2019-10-23 | 2022-07-26 | 中国石油化工股份有限公司 | Underground fishing device |
| CN110984896B (en) * | 2019-12-31 | 2022-04-26 | 中冶交通建设集团有限公司 | Tool for salvaging percussion bit of bored pile and construction method thereof |
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| GB8920606D0 (en) * | 1989-09-12 | 1989-10-25 | Tri State Oil Tool Uk | Slip type coil tubing overshot |
| CN2898270Y (en) * | 2005-11-10 | 2007-05-09 | 吐哈石油勘探开发指挥部钻井公司 | Backward fishing tool of wireless drill measuring equipment |
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-
2018
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|---|---|---|---|---|
| GB8920606D0 (en) * | 1989-09-12 | 1989-10-25 | Tri State Oil Tool Uk | Slip type coil tubing overshot |
| CN2898270Y (en) * | 2005-11-10 | 2007-05-09 | 吐哈石油勘探开发指挥部钻井公司 | Backward fishing tool of wireless drill measuring equipment |
| CN201883977U (en) * | 2010-12-10 | 2011-06-29 | 中国石油天然气股份有限公司 | Continuous oil pipe fishing tool for slip type underground throttler |
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| Publication number | Publication date |
|---|---|
| CN108590559A (en) | 2018-09-28 |
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