CN216841535U - Integrated abandoned well casing cutting fisher - Google Patents
Integrated abandoned well casing cutting fisher Download PDFInfo
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- CN216841535U CN216841535U CN202220056313.9U CN202220056313U CN216841535U CN 216841535 U CN216841535 U CN 216841535U CN 202220056313 U CN202220056313 U CN 202220056313U CN 216841535 U CN216841535 U CN 216841535U
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Abstract
The utility model relates to a well casing cutting fisher is abandoned to integral type, it includes top connection (1) and body (2), be equipped with a plurality of cutter bar (22) on body (2) lateral wall, be equipped with cutting knife (3) in each cutter bar (22) respectively, be equipped with in the centre bore of body (2) and push away cutter bar (4), it is equipped with pressure spring (6) to push away cutter bar (4) and go up the cover, the cover is equipped with slips (7) on body (2) outer wall, the upper end of slips (7) is equipped with sliding sleeve (72), circumference is equipped with length track switching-over spout (24) on body (2) outer wall, radially be equipped with a plurality of switching-over round pin (73) between sliding sleeve (72) and body (2), the one end of each switching-over round pin (73) is installed on sliding sleeve (72), the other end and length track switching-over spout (24) sliding fit. The fishing tool simplifies the cutting and fishing process of the casing, can finish the cutting and fishing work of the casing at one time by using the fishing tool next time, and can greatly improve the cutting and fishing efficiency of the casing.
Description
Technical Field
The utility model relates to a petroleum tool, concretely relates to well casing cutting fisher is abandoned to integral type.
Background
Currently, the oilfield sector deals with abandoned or damaged unused casing by lowering a cutting tool downhole, cutting the casing at the appropriate location, and then raising the cutting tool uphole. And then, the fishing tool is put into the well and fished to the cut casing pipe, and then the casing pipe is fished to the well. The casing cutting and fishing mode needs to put tools down to the underground twice, which wastes time and has lower efficiency. The next tool can not be realized, the cutting and fishing of the sleeve can be completed at one time, and the efficiency of cutting and fishing of the sleeve is not improved.
Disclosure of Invention
The utility model aims at providing a next instrument can once only accomplish cutting and salvage the sheathed tube, is favorable to improving the integral type abandoning well casing pipe cutting fisher of casing pipe cutting salvage efficiency.
The technical solution of the utility model is that: the tool comprises an upper joint and a body, wherein the lower end of the upper joint is axially and fixedly connected with the upper end of the body, a drill rod connecting internal thread is arranged at the upper end of the upper joint, a drill rod connecting external thread is arranged at the lower end of the body, a plurality of cutter grooves are circumferentially arranged on the side wall of the body above the drill rod connecting external thread, cutters hinged on the body through cutter pins are respectively arranged in the cutter grooves, a push cutter rod matched with each cutter is arranged at the lower end above each cutter in the center hole of the body, the push cutter rod is axially and slidably arranged in the center hole of the body, the outer wall of the lower half section of the push cutter rod is axially and slidably matched with the inner wall of the body, a piston in axially and hermetically matched with the inner wall of the body is arranged at the upper end of the push cutter rod, a pressure spring matched with the lower end surface of the piston and matched with the inner end surface of the body facing upwards is sleeved on the outer wall of the body above each cutter groove, and a slip cylinder is sleeved on the outer wall of the body above the cutter groove, the outer wall of the body is provided with an outer conical surface which is matched with the lower end of the slip and is thick at the bottom and thin at the top, the inner conical surface which is matched with the outer conical surface of the body and is thick at the bottom and thin at the top is arranged on the inner wall of the lower end of the slip, the upper end of the slip is provided with a sliding sleeve which is sleeved outside the body and is in running fit with the slip, the outer wall of the body at the position matched with the sliding sleeve is circumferentially provided with a circle of zigzag long and short track reversing sliding grooves, a plurality of reversing pins are radially arranged between the sliding sleeve and the body, one end of each reversing pin facing the opposite direction of the center of the body is arranged on the sliding sleeve, and the other end facing the center direction of the body is positioned in the long and short track reversing sliding grooves and is in sliding fit with the long and short track reversing sliding grooves.
The technical effects of the utility model are that: the cutting and fishing tool has the advantages that the cutting and fishing process of the casing pipe is simplified by using the cutting and fishing tool, the cutting and fishing work of the casing pipe can be completed at one time by using the cutting and fishing tool, and the cutting and fishing efficiency of the casing pipe can be greatly improved. The fishing is directly carried out after the casing pipe is cut, so that the success rate of the fishing can be improved. If the casing is cut not smoothly and the tool needs to be taken out when the casing is not cut, the tool can be lifted and lowered by lifting the tool, the casing is released, and the tool is lifted and withdrawn, so that a proper solution is adopted.
Drawings
FIG. 1 is a cross-sectional structural view of an embodiment of the present invention;
fig. 2 is a partial development view of the long and short track reversing chute according to the embodiment of the present invention.
Detailed Description
As shown in figures 1 and 2, the device comprises an upper joint 1 and a body 2, wherein the lower end of the upper joint 1 is axially fixedly connected with the upper end of the body 2, the upper end of the upper joint 1 is provided with a drill rod connecting internal thread 11, the lower end of the body 2 is provided with a drill rod connecting external thread 21, a plurality of cutting grooves 22 are circumferentially arranged on the side wall of the body 2 above the drill rod connecting external thread 21, cutting knives 3 hinged on the body 2 through knife pin shafts 31 are respectively arranged in the cutting grooves 22, a push knife rod 4 which is positioned above each cutting knife 3 and is matched with each cutting knife 3 is arranged in the central hole of the body 2, the push knife rod 4 is axially and slidably arranged in the central hole of the body 2, the outer wall of the lower half section of the push knife rod 4 is axially and slidably matched with the inner wall of the body 2, the piston 5 of which is axially and slidably matched with the outer wall of the inner wall of the body 2 is arranged at the upper end part, and the upper end part is sleeved on the push knife rod 4, and is matched with the lower end surface of the piston 5, A pressure spring 6 with the lower end matched with the upward inner end surface of the body 2, a cylindrical slip 7 is sleeved on the outer wall of the body 2 above each cutting knife groove 22, the outer wall of the body 2 is provided with a lower thick and upper thin outer conical surface 23 matched with the lower end part of the slip 7, the inner wall of the lower end part of the slip 7 is provided with a lower thick and upper thin inner conical surface 71 matched with the outer conical surface 23 of the body 2, the upper end of the slip 7 is provided with a sliding sleeve 72 which is sleeved outside the body 2 and is rotationally matched with the slip 7, a circle of zigzag long and short track reversing chutes 24 are circumferentially arranged on the outer wall of the body 2 at the position matched with the sliding sleeve 72, a plurality of reversing pins 73 are radially arranged between the sliding sleeve 72 and the body 2, one end of each reversing pin 73 facing the opposite direction of the center of the body 2 is arranged on the sliding sleeve 72, and the other end facing the center of the body 2 is positioned in the long and short track reversing chute 24 and is in sliding fit with the long and short track reversing chute 24.
The upper end of body 2 is equipped with the internal thread, is equipped with the external screw thread on the outer wall at top connection 1 middle part, and the upper end of body 2 passes through the screw thread and links to each other with top connection 1 axial fixity, and the lower extreme of top connection 1 extends to body 2 in and cooperatees with the upper end of piston 5. The outer wall of the upper joint 1 above the position where the external thread is arranged is provided with a sealing ring groove, and an O-shaped sealing ring 8 which is in sealing fit with the inner wall of the body 2 is arranged in the sealing ring groove.
Be equipped with the external screw thread on the upper end outer wall of body 2, the upper end of body 2 is installed through the screw thread and is equipped with two matched with of cap 20 that play the limiting displacement effect that makes progress to slips 7.
The upper end of the push broach rod 4 is provided with external threads, the central hole of the piston 5 is internally provided with internal threads, and the upper end of the push broach rod 4 is fixedly connected with the piston 5 in the axial direction through the threads. The outer wall of the push rod 4 below the position where the external thread is arranged is provided with a sealing ring groove, and an O-shaped sealing ring 8 which is in sealing fit with the inner wall of the piston 5 is arranged in the sealing ring groove.
The axial direction of the push rod 4 is provided with a center hole for communicating the upper end and the lower end of the push rod 4, and a nozzle 41 with the outer wall matched with the inner wall of the push rod 4 in a sealing way is arranged in the center hole at the lower end part of the push rod 4. A retainer groove is provided on the inner wall of the push-type broach rod 4 above the nozzle 41, and a retainer ring 42 for hole having a lower end surface fitted with the upper end surface of the nozzle 41 is installed in the retainer groove. A sealing ring groove is arranged at the position, which is matched with the nozzle 41 in a sealing way, on the inner wall of the push rod 4, and an O-shaped sealing ring 8 which is matched with the outer wall of the nozzle 41 in a sealing way is arranged in the sealing ring groove.
The side wall of the middle lower part of the push rod 4 is radially provided with a plurality of through holes 43 which are communicated with the central hole and the outer wall of the push rod 4.
Two sealing ring grooves are arranged on the outer wall of the piston 5, and an O-shaped sealing ring 8 which is in sliding sealing fit with the inner wall of the body 2 is respectively arranged in each sealing ring groove.
The side wall of the slip 7 is axially provided with a plurality of elastic deformation gaps extending upwards from the lower end of the slip 7, and the outer wall of the lower end of the slip 7 is provided with fishing teeth.
An inner flange 74 is arranged on the inner wall below the upper end portion of the slip 7, the inner wall of the inner flange 74 is in sliding fit with the outer wall of the body 2, an annular space is formed between the inner wall of the slip 7 above the inner flange 74 and the outer wall of the body 2, the sliding sleeve 72 is arranged in the annular space and sleeved outside the body 2, a lower thrust bearing 75 and an upper thrust bearing 76 which are respectively arranged below and above the sliding sleeve 72 and sleeved outside the body 2 are arranged in the annular space, a plug 77 sleeved outside the body 2 is arranged above the upper thrust bearing 76, an external thread is arranged on the outer wall of the middle lower portion of the plug 77, an internal thread is arranged on the inner wall of the upper end portion of the slip 7, the plug 77 is arranged at the upper end portion of the slip 7 through a thread, and the lower thrust bearing 75, the sliding sleeve 72 and the upper thrust bearing 76 are axially arranged between the upper end face of the inner flange 74 of the slip 7 and the lower end face of the plug 77.
The middle upper part of each cutting knife 3 is hinged on the body 2 through a knife pin shaft 31, and the lower end part of each cutting knife 3 and the side surface of the middle lower part facing the outside of the body 2 are respectively provided with a cutting edge 32. The upper end part of each cutting knife 3 in the body 2 is respectively provided with a push head 33 matched with the lower end surface of the push knife rod 4.
The zigzag long and short track reversing chute 24 on the outer wall of the body 2 comprises an even number of inflection points 25 facing the lower part of the body and the same number of inflection points 25 facing the upper part of the body 2, half of the circumferentially spaced inflection points 25 facing the lower part of the body 2 extend to the lower part of the body 2 for a certain distance, the zigzag long and short track reversing chutes 24 and the reversing pins 73 are matched to form a long chute 26 between the zigzag long chute 25 and the zigzag short chute 27, and the zigzag long and short track reversing chutes 24 and the reversing pins 73 are matched to form an alternate fishing and releasing sleeve structure.
The working principle is as follows:
in the annular space between the slips 7 and the body 2, a lower thrust bearing 75, a sliding sleeve 72, an upper thrust bearing 76 and a plug 77 are sequentially arranged from top to bottom, so that the slips 7 can freely rotate around the main body 2 and can also move up and down in the range limited by the reversing pin 73 along the axial direction of the main body 2, and the two actions are not interfered with each other. And fishing teeth processed on the outer wall of the lower end of the slip 7 are used for fishing the casing. The outer conical surface 23 on the outer wall of the body 2 is matched with the inner conical surface 71 at the lower end part of the slip 7, so that the lower end of the slip 7 is expanded, and the inner wall of the sleeve is grabbed. The zigzag long and short track reversing sliding groove 24 on the outer wall of the body 2 is matched with the reversing pin 73 on the sliding sleeve 72, so that the reversing pin 73 is switched between the long sliding groove 26 and the short sliding groove 27 to control the grabbing and releasing actions of the slips 7. The parts such as a push-type broach rod 4, a pressure spring 6, a piston 5, a nozzle 41 and the like are arranged in the body 2 and used for pushing the cutting knife 3 to cut the sleeve by hydraulic pressure.
When in use, the fisher is connected to the lower part of the cutting pipe column and is sent into the casing pipe to be cut to a preset depth for cutting operation. After the overshot is lowered to the position intended for cutting, the tool is lowered so that the slips 7 are released (and cannot be set for fishing). Then, a pump is started to circulate drilling fluid to wash the well, along with the gradual increase of the flow, the drilling fluid generates throttling pressure at two ends of the nozzle 41 and the piston 5 to push the push cutter rod 4 to move downwards, the push cutter rod pushes the cutter point of the cutting knife 3 to expand outwards by utilizing the lever principle to abut against the inner wall of the casing to be cut, and meanwhile, the drill rod is rotated to cut. After the casing is cut off, the drill rod is directly lifted up to enable the cutting knife 3 to be separated from the casing cut. And then, lowering and lifting the drill rod, and if the hanging weight is obviously increased, proving that the fisher catches the cut casing pipe, and then pulling out the drill. If the hanging weight is not obviously increased, the fishing is not proved. At this point, the drill pipe can be lowered for a certain distance (more than half a meter is recommended to be lowered so as to enable the reversing pin 73 to be sufficiently shifted), and then lifted upwards, and the drill can be lifted upwards by feeling that the hanging weight is obviously increased.
If the casing is not cut smoothly and the tool needs to be taken out when the casing cannot be cut, the reversing pin 73 can be switched into the short chute 27 through the lifting and lowering actions, the slips are in the releasing position, and the drill rod is lifted up and exits the tool.
Use notes:
1. when the integrated abandoned well casing cutting fisher is used for cutting and fishing, the slips are required to be in the release position and cannot be in the fishing position and the upward lifting state.
2. When the drill rod is rotated to cut, if the drill rod is blocked, the drill rod can be moved up and down to cut without increasing too large torque.
3. The outer diameter of the slip is selected to be matched with the inner diameter of the casing to be cut so as to avoid failure of cutting and fishing operation.
Claims (10)
1. Well casing cutting fisher is abandoned to integral type, it includes top connection (1) and body (2), and the lower extreme of top connection (1) links to each other with the upper end axial fixity of body (2), and the upper end of top connection (1) is equipped with drilling rod connection internal thread (11), and the lower extreme of body (2) is equipped with drilling rod connection external screw thread (21), its characterized in that: a plurality of cutter grooves (22) are circumferentially arranged on the side wall of the body (2) at the position above the drill rod connecting external thread (21), cutters (3) hinged on the body (2) through cutter pin shafts (31) are respectively arranged in each cutter groove (22), a push cutter rod (4) which is positioned above each cutter (3) and is matched with each cutter (3) at the lower end is arranged in the central hole of the body (2), the push cutter rod (4) is axially and slidably arranged in the central hole of the body (2), the outer wall of the lower half section of the push cutter rod (4) is axially and slidably matched with the inner wall of the body (2), a piston (5) which is axially and slidably matched with the inner wall of the body (2) at the outer wall is arranged at the upper end part, a pressure spring (6) which is matched with the lower end surface of the piston (5) and is matched with the inner end surface of the body (2) towards the upper part is sleeved on the upper end part of the push cutter rod (4), a cylindrical slip (7) is sleeved on the outer wall of the body (2) at the position above each cutter groove (22), the outer wall of the body (2) is provided with an external conical surface (23) which is thick at the lower part and is thin at the upper part and is matched with the lower end part of the slip (7), the inner wall of the lower end part of the slip (7) is provided with an internal conical surface (71) which is thick at the lower part and is thin at the upper part and is matched with the external conical surface (23) of the body (2), the upper end of the slip (7) is provided with a sliding sleeve (72) which is sleeved outside the body (2) and is rotationally matched with the slip (7), a circle of zigzag long and short track reversing sliding grooves (24) are formed in the outer wall of the body (2) in the position matched with the sliding sleeve (72) in the circumferential direction, a plurality of reversing pins (73) are radially arranged between the sliding sleeve (72) and the body (2), one end, facing the center opposite direction of the body (2), of each reversing pin (73) is installed on the sliding sleeve (72), and the other end, facing the center direction of the body (2), of each reversing pin is located in the long and short track reversing sliding groove (24) and is in sliding fit with the long and short track reversing sliding grooves (24).
2. The integrated abandoned well casing cutting fisher according to claim 1, wherein the upper end of the body (2) is provided with internal threads, the outer wall of the middle part of the upper joint (1) is provided with external threads, the upper end of the body (2) is fixedly connected with the upper joint (1) in the axial direction through threads, and the lower end of the upper joint (1) extends into the body (2) to be matched with the upper end of the piston (5).
3. An integrated abandoned well casing cutting fisher according to claim 1, wherein the outer wall of the upper end part of the body (2) is provided with external threads, and the upper end part of the body (2) is provided with two matched spare caps (20) which play a role in limiting the slips (7) upwards through threads.
4. The integrated abandoned well casing cutting fisher according to claim 1, wherein the upper end of the push rod (4) is provided with external threads, the central hole of the piston (5) is internally provided with internal threads, and the upper end of the push rod (4) is axially and fixedly connected with the piston (5) through threads.
5. The integrated abandoned well casing cutting fisher according to claim 1, wherein the push rod (4) is axially provided with a central hole communicating the upper end and the lower end of the push rod (4), and a nozzle (41) with the outer wall in sealing fit with the inner wall of the push rod (4) is arranged in the central hole at the lower end of the push rod (4).
6. An integral abandonment casing cutting fisher according to claim 5, wherein the sidewall of the middle and lower part of the push rod (4) is provided with a plurality of through holes (43) which are communicated with the central hole and the outer wall of the push rod (4) in the radial direction.
7. An integrated abandoned well casing cutting fisher according to claim 1, wherein the side wall of the slip (7) is provided with a plurality of elastic deformation gaps extending upwards from the lower end of the slip (7) along the axial direction, and the outer wall of the lower end of the slip (7) is provided with fishing teeth.
8. The integrated abandoned well casing cutting fisher according to claim 1, wherein an inner flange (74) is arranged on the inner wall below the upper end part of the slip (7), the inner wall of the inner flange (74) is in sliding fit with the outer wall of the body (2), an annular space is formed between the inner wall of the slip (7) above the inner flange (74) and the outer wall of the body (2), the sliding sleeve (72) is positioned in the annular space and sleeved outside the body (2), a lower thrust bearing (75) and an upper thrust bearing (76) which are respectively positioned below and above the sliding sleeve (72) and sleeved outside the body (2) are arranged in the annular space, a plug (77) sleeved outside the body (2) is arranged above the upper thrust bearing (76), an external thread is arranged on the outer wall of the middle lower part of the plug (77), an internal thread is arranged on the inner wall of the upper end part of the slip (7), the plug (77) is arranged on the upper end part of the slip (7) through threads, and a lower thrust bearing (75), a sliding sleeve (72) and an upper thrust bearing (76) are axially arranged between the upper end surface of an inner flange (74) of the slip (7) and the lower end surface of a plug (77).
9. An integral well abandoning casing cutting fisher according to claim 1, wherein the middle upper part of each cutter (3) is hinged on the body (2) through a cutter pin shaft (31), and the lower end part of each cutter (3) and the side surface of the middle lower part facing the outside of the body (2) are respectively provided with a cutting edge (32).
10. An integrated abandonment casing cutting fisher according to claim 1, characterized in that the zigzag long and short track reversing chutes (24) on the outer wall of the body (2) comprise an even number of inflection points (25) facing below the body and the same number of inflection points (25) facing above the body (2), half of the circumferentially spaced inflection points (25) facing below the body (2) extend a distance below the body (2) to form long chutes (26) with the inflection points (25) facing above the body (2) in cooperation, the other half of the circumferentially spaced inflection points (25) facing below the body (2) and the inflection points (25) facing above the body (2) in cooperation form short chutes (27), and the long and short track reversing chutes (24) and the reversing pins (73) cooperate to form an alternate fishing and releasing casing structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220056313.9U CN216841535U (en) | 2022-01-11 | 2022-01-11 | Integrated abandoned well casing cutting fisher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220056313.9U CN216841535U (en) | 2022-01-11 | 2022-01-11 | Integrated abandoned well casing cutting fisher |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216841535U true CN216841535U (en) | 2022-06-28 |
Family
ID=82115285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220056313.9U Active CN216841535U (en) | 2022-01-11 | 2022-01-11 | Integrated abandoned well casing cutting fisher |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216841535U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115584943A (en) * | 2022-10-28 | 2023-01-10 | 西南石油大学 | Hand-throwing buckle type downhole fishing tool |
-
2022
- 2022-01-11 CN CN202220056313.9U patent/CN216841535U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115584943A (en) * | 2022-10-28 | 2023-01-10 | 西南石油大学 | Hand-throwing buckle type downhole fishing tool |
| CN115584943B (en) * | 2022-10-28 | 2024-04-16 | 西南石油大学 | Buckle type downhole throwing and fishing tool capable of being released |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Integrated abandonment casing cutting and fishing tool Effective date of registration: 20230329 Granted publication date: 20220628 Pledgee: Longjiang Bank Co.,Ltd. Mudanjiang Ping'an Branch Pledgor: Mudanjiang Tongyong Petroleum Tool Co.,Ltd. Registration number: Y2023230000032 |