CN220469856U

CN220469856U - Fishing tool and fishing equipment

Info

Publication number: CN220469856U
Application number: CN202320902606.9U
Authority: CN
Inventors: 姜金明; 赵国厚; 李常友; 李树军; 刘欢; 汪洋
Original assignee: China Petroleum and Chemical Corp; Sinopec Northeast Oil and Gas Co
Current assignee: China Petroleum and Chemical Corp; Sinopec Northeast Oil and Gas Co
Priority date: 2023-04-20
Filing date: 2023-04-20
Publication date: 2024-02-09
Anticipated expiration: 2033-04-20

Abstract

The utility model relates to the field of oil and gas exploitation and discloses a fishing tool and fishing equipment, wherein the fishing tool comprises an upper joint (1), an overshot (2) and a throwing device (4) arranged in the overshot (2), the top end of the overshot (2) is connected with the upper joint (1), the throwing device (4) can grab a fish, the upper joint (1) is provided with a water hole (12) communicated with an inner cavity (14) so as to be communicated with the upper joint (1) and the overshot (2), the upper joint can be connected with a screw motor and a pumping device, the screw motor can drive the fishing tool to move and rotate, and the pumping device can convey liquid into the fishing tool so as to flush the fish top of the fish. Through the technical scheme, dirt such as mud of the fish tops of the fishes can be washed, so that the fish tops of the fishes are thoroughly exposed, the fishes can more easily enter the overshot, and the fishes can be grabbed through the throwing and fishing device.

Description

Fishing tool and fishing equipment

Technical Field

The utility model relates to the field of petroleum and natural gas exploitation, in particular to a fishing tool and a fishing device.

Background

In the development and production process of oil and gas fields, in order to better exert single well productivity, improve recovery ratio, often develop construction operations such as various measures, tests, etc., the condition of falling objects entering the well is unavoidable in the operation process, once falling objects enter the well, the progress of the next measures is influenced, even the single well productivity is influenced, and it is important to timely and efficiently salvage the falling objects in the well.

In the single well operation of oil gas field, according to different purpose down into different instruments, the factors such as operation, judgement, well condition complicacy cause the instrument to fall the well to call the fish in the work progress, general fish position, fish top form, pit shaft situation can be different, the fish top of fish can influence the salvage effect if failing to wash cleanly, to the special salvage tool of current fish such as wire transmission manometer, thermometer, control class instrument, it does not generally set up the wash water eye, after it is visited to the fish top, has the problem that can't introduce the fish top into the salvage tool because the fish top is unclean, especially need wash the fish top more in horizontal well horizontal segment.

Disclosure of Invention

The utility model aims to solve the problem that in the prior art, a fish top cannot be flushed and cannot be introduced into a fishing tool, and provides the fishing tool and the fishing equipment.

In order to achieve the above object, according to one aspect of the present utility model, there is provided a fishing tool including an upper joint, an overshot, and a throwing device provided in the overshot, a tip of the overshot being connected to the upper joint, the throwing device being capable of gripping a fish, the upper joint being provided with a water hole communicating with an inner cavity to communicate the upper joint with the overshot, the upper joint being connectable to a screw motor and a pumping device, the screw motor being capable of driving the fishing tool to move and rotate, the pumping device being capable of feeding a liquid into the fishing tool to flush a fish top of the fish.

Further, the overshot further comprises a lower connector connected with the bottom end of the overshot, a central through hole is formed in the lower connector, and a guide shoe is arranged at the end portion of the lower connector.

Further, the end part of the guide shoe is provided with milling teeth.

Further, a through hole extending along the direction parallel to the central axis of the lower joint is formed in the wall of the lower joint.

Further, the upper joint is provided with a pressure relief water hole extending from the inner cavity to the periphery.

Further, two ends of the overshot are respectively in threaded connection with the upper joint and the lower joint in a tubing buckle mode.

Further, the overshot comprises a main body arranged inside the overshot, a slip arranged at the lower end part of the main body and a slip spring arranged between the main body and the slip, wherein the slip can be opened or closed along with the expansion and contraction of the slip spring.

Further, the overshot is provided with an inner shell and a return spring, the main body is sleeved on the inner shell, two ends of the return spring are respectively propped against the inner wall of the main body and the end part of the inner shell, and the slip spring is sleeved on the inner shell.

Further, the overshot further comprises a connector, and the connector is connected with a fixing hole Xiang Luo on the upper connector.

In another aspect, the present utility model provides a fishing apparatus comprising a pump apparatus disposed on the ground, a screw motor coupled to the pump apparatus, and a fishing tool according to any one of the above teachings coupled to the screw motor.

Through above-mentioned technical scheme, through removing fishing tool, make the center of overshot aim at the fish to with the lower extreme of overshot open the mask on the fish, open simultaneously pumping equipment, make it flush water in to the fishing tool, liquid flows in from the top connection, flows out from the lower extreme of overshot, washes dirt such as the mud of fish top of the fish, so as to thoroughly expose the fish top of the fish, make the fish more easily get into in the overshot, the rethread thrower snatchs it.

Drawings

FIG. 1 is a schematic diagram of one embodiment of an upper joint, overshot, and lower joint of the present utility model;

fig. 2 is a schematic diagram of an embodiment of the overshot of the utility model.

Description of the reference numerals

1. The upper joint, 2, the overshot, 3, the lower joint, 4, the overshot, 11, the fixed orifices, 12, the water hole, 13, the pressure release water hole, 14, the inner cavity, 31, the shoe, 32, the through hole, 33, the milling teeth, 34, the bell mouth, 41, the main body, 42, the inner shell, 43, the slips, 44, the slip spring, 45, the return spring, 46 and the connector.

Detailed Description

The following describes specific embodiments of the present utility model in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the utility model, are not intended to limit the utility model.

In one aspect, the utility model discloses a fishing tool, comprising an upper joint 1, an overshot 2 and a throwing device 4 arranged in the overshot 2, wherein one end of the overshot 2 is connected with the upper joint 1, the throwing device 4 can grab a fish, the upper joint 1 is provided with a water hole 12 communicated with an inner cavity 14 so as to communicate the upper joint 1 and the overshot 2, the upper joint 1 can be connected with a screw motor and a pumping device, the screw motor can drive the fishing tool to move and rotate, and the pumping device can convey liquid into the fishing tool to wash the fish top of the fish.

As shown in fig. 1, the overshot 4 is installed inside the overshot 2, and the length of the overshot 2 is greater than that of the overshot 4, the overshot 2 is sleeved on the upper joint 1, the overshot 4 is connected with the upper joint 1, an inner cavity 14 with one end being open is arranged on the upper joint 1, the water hole 12 is arranged at the bottom of the inner cavity 14 and penetrates downwards in the radial direction so as to communicate the inner cavity 14 and the inner cavity of the overshot 2, the position, the size and the number of the water hole 12 can be set according to actual requirements, for example, the water holes 12 are 4 and are circumferentially arranged along the central axis of the upper joint 1, the fishing tool is driven by the screw motor, the central through hole of the lower joint is aligned with the fish, the lower joint is buckled on the fish, meanwhile, the pumping equipment is opened, the liquid flows into the fishing tool from the upper joint, the liquid flows out of the lower joint, dirt such as mud on the fish top is thoroughly exposed to the fish top, the fish top is easier to enter the overshot, and the fish is grabbed by the fishing tool.

As an alternative embodiment, it further comprises a lower joint 3 connected to the other end of the overshot 2, the lower joint 3 being provided with a central through hole, the end of the lower joint 3 being provided with a shoe 31.

As shown in fig. 1, the edge of the shoe 31 is spiral, and the wall thickness of the shoe 31 gradually increases from the end to the inside to form a flare 34 with a tapered opening from bottom to top, so that a fish can be more easily covered and introduced, and the fish enters the overshot 2 through the central through hole and is grabbed by the overshot 4.

Further, the end of the guide shoe 31 is provided with milled teeth 33.

As shown in fig. 1, milling teeth 33 are arranged on the edge of the end part of the guide shoe 31, when the guide shoe 31 covers the fish tops of the fish, the screw motor starts to operate, and then the fishing tool is driven to rotate, the milling teeth 33 at the bottom of the fishing tool continuously mill and repair dirt such as sludge around the fish tops in the rotating process, the salvageable fish tops are fully exposed, the fish tops are conveniently guided into the guide shoe 31, and the fish tops of the fish can be gradually guided into the center of the salvaging barrel through repeated rotation of the guide shoe 31.

In some embodiments, the wall of the lower joint 3 is provided with a through-hole 32 extending in a direction parallel to the central axis of the lower joint 3.

As shown in fig. 1, during the lowering of the fishing tool, the well will enter the inside of the overshot 2 through the central through hole of the lower joint 3, so that a reverse pressure is applied, in order to alleviate the obstruction of the lowering of the fishing tool caused by the pressure, a through hole 32 is provided on the lower joint 3, and during the lowering of the fishing tool, the liquid at the bottom of the fishing tool can be discharged from bottom to top through the through hole 32, so as to realize decompression.

As an alternative embodiment, the upper joint 1 is provided with a pressure relief water hole 13 extending from the inner cavity 14 to the outer periphery.

As shown in fig. 1, after the overshot 4 successfully catches the fish, the space between the overshot 2 and the overshot 4 is blocked due to the fish, so that part of the liquid flow channel is blocked, and the pumping equipment on the ground has obvious pressure-holding display, so that the successful completion of the fishing of the fish can be judged; meanwhile, after the fishing is successfully carried out, excessive pressure build-up in the fishing tool can possibly cause certain damage to tools such as pumping equipment, screw motors and the like on the ground, and at the moment, liquid in the upper joint 1 is subjected to partial pressure relief in the inner cavity 14 through the pressure relief water hole 13, so that the tools such as the pumping equipment, the screw motors and the like on the ground are protected.

Wherein, the two ends of the overshot 2 are respectively in threaded connection with the upper joint 1 and the lower joint 3 by adopting a mode of oil pipe buckles.

As shown in fig. 1, the upper connector 1 is provided with an internal tubing buckle, and is used for connecting with a connector of a screw motor, such as a UTBG tubing buckle, and the upper connector 1 and the overshot 2 are connected in the same connection manner as the overshot 2 and the lower connector 3, so that the connection strength can be effectively ensured.

Further, the overshot 4 comprises a body 41 provided inside the overshot 2, a slip 43 provided at a lower end portion of the body 41, and a slip spring 44 provided between the body 41 and the slip 43, the slip 43 being openable and closable as the slip spring 44 expands and contracts.

As shown in fig. 2, the fishing tool 4 may be a commercially available fishing tool, for example, a CAMCO J series fishing tool, a CAMCO PRS series fishing tool, an otos G series fishing tool, or the like, where a JDC fishing tool in the CAMCO J series is selected in this application, and the basic working principle of the fishing tool 4 is that a fish drop top is on a central rod in the fishing tool 4, and drives a slip spring 44 to shrink, and as the fish drop goes deep, the slip spring 44 continuously shrinks, and the slip 43 gradually expands, so that the fish drop top enters the slip 43, and the slip 43 rebounds, thereby completing the capturing of the fish drop.

The overshot 4 further comprises an inner shell 42 and a return spring 45, the main body 41 is sleeved on the inner shell 42, two ends of the return spring 45 respectively prop against the inner wall of the main body 41 and the end part of the inner shell 42, and a slip spring 44 is sleeved on the inner shell 42.

As shown in fig. 2, after the fish top enters the slips 43, the return spring 45 pushes the main body 41 to move outwards under the action of elastic force, so that the slips 43 are continuously closed, and finally, the clamping and locking of the fish are completed.

Further, the overshot 4 further comprises a connector 46, and the connector 46 is screwed with the fixing hole 11 on the upper joint 1.

As shown in connection with fig. 1 and 2, the process of installing the fishing tool is: firstly, screwing the overshot 4 into the upper joint 1, secondly, sleeving the overshot 2 outside the overshot 4 and screwing the overshot with the upper joint 1, and finally screwing the lower joint 3 into the overshot 2.

In another aspect, the utility model provides a fishing device comprising a screw motor connected to the pumping device by a pumping device arranged on the ground and a fishing tool connected to the screw motor.

The fishing tool in the application is transmitted to the fish top of the fish by 2m through the continuous oil pipe or the common oil pipe, and then the pumping equipment is started on the ground to wash, wherein the ground pumping system is connected in the following way: pump truck + coiled tubing main truck inlet plug valve or pump truck + hose + plug valve + tubing; the downhole fishing tool combination system is as follows: the continuous oil pipe connector, the screw motor, the composite overshot or the oil pipe, the screw motor and the composite overshot realize the driving and the control of the overshot.

The preferred embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited thereto. Within the scope of the technical idea of the utility model, a number of simple variants of the technical solution of the utility model are possible, which simple variants and combinations should likewise be regarded as being disclosed by the utility model, all falling within the scope of protection of the utility model.

In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations of the utility model are not described in detail in order to avoid unnecessary repetition.

Moreover, any combination of the various embodiments of the utility model can be made without departing from the spirit of the utility model, which should also be considered as disclosed herein.

Claims

1. The utility model provides a fishing tool, its characterized in that includes upper joint (1), overshot (2) and sets up overshot (4) in overshot (2), the top of overshot (2) with upper joint (1) links to each other, overshot (4) can snatch the fish, upper joint (1) be provided with water eye (12) of inner chamber (14) intercommunication, in order to communicate upper joint (1) with overshot (2), upper joint (1) can be connected in screw motor and pump notes equipment, screw motor can order about fishing tool removes and rotates, pump notes equipment can to carry liquid in the fishing tool in order to wash the fish top of fish.

2. Fishing tool according to claim 1, further comprising a lower joint (3) connected to the bottom end of the overshot (2), the lower joint (3) being provided with a central through hole, the end of the lower joint (3) being provided with a shoe (31).

3. Fishing tool according to claim 2, characterized in that the end of the shoe (31) is provided with milling teeth (33).

4. Fishing tool according to claim 2, characterized in that the wall of the lower joint (3) is provided with a through hole (32) extending in a direction parallel to the centre axis of the lower joint (3).

5. Fishing tool according to claim 1, characterized in that the upper joint (1) is provided with pressure relief water holes (13) extending from the inner cavity (14) to the outer periphery.

6. Fishing tool according to claim 2, characterized in that the two ends of the overshot (2) are screwed to the upper joint (1) and the lower joint (3) respectively by means of tubing clasps.

7. Fishing tool according to claim 1, characterized in that the overshot (4) comprises a body (41) arranged inside the overshot (2), a slip (43) arranged at the lower end of the body (41) and a slip spring (44) arranged between the body (41) and the slip (43), the slip (43) being openable and closable with the expansion and contraction of the slip spring (44).

8. Fishing tool according to claim 7, characterized in that the overshot (4) is further provided with an inner housing (42) and a return spring (45), the main body (41) is sleeved on the inner housing (42), two ends of the return spring (45) are respectively propped against the inner wall of the main body (41) and the end part of the inner housing (42), and the slip spring (44) is sleeved on the inner housing (42).

9. Fishing tool according to claim 8, characterized in that the overshot (4) further comprises a connection head (46), which connection head (46) is screwed with a fixing hole (11) in the upper joint (1).

10. A fishing apparatus comprising a pump apparatus disposed on the surface, a screw motor connected to the pump apparatus, and a fishing tool as claimed in any one of claims 1 to 9 connected to the screw motor.