Oil and gas field underground fishing tool

Abstract

The utility model relates to the technical field of oil and gas downhole tools, and discloses an oil and gas field downhole fishing tool which comprises a supporting seat and a fixing barrel, the fixing barrel is fixedly connected to the bottom of the supporting seat, the top of the supporting seat is fixedly connected with a telescopic cylinder, the power output end of the telescopic cylinder is fixedly connected with a power shaft, and the power shaft is fixedly connected with a fishing rod. The power shaft penetrates through the top of the supporting seat and extends to an inner cavity of the fixing cylinder, the bottom end of the power shaft is rotationally connected with a lead screw, and a fishing piece is arranged at the bottom of the lead screw; a threaded seat is slidably arranged in an inner cavity of the fixed cylinder, a guide part for guiding the threaded seat is arranged on the fixed cylinder, the lead screw is in threaded connection with the threaded seat, a limiting part for limiting the threaded seat is arranged on the fixed cylinder, and the fishing part comprises a rotating rod and a hook; according to the scheme, the use cost can be reduced, and the use efficiency of an underground fishing tool is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil and gas downhole tools, in particular to an oil and gas field downhole fishing tool. Background Art

[0002] An oil and gas field refers to the sum of oil reservoirs, gas reservoirs, and oil and gas reservoirs within the same area controlled by a single local structural unit. Specifically, if there are only oil reservoirs within this local structural range, it is called an oil field; if there are only gas reservoirs, it is called a gas field. During downhole operations in oil and gas fields, downhole salvage tools are usually used, mainly to extract residues and other impurities near the wellbore to improve production efficiency and ensure the safety of downhole operations.

[0003] The utility model patent with patent application publication number 202121922881.4 discloses an oil and gas field downhole salvage tool, including a fixed rod, the inner wall of the fixed rod is slidably connected with a fixed tube, the inner wall of the fixed tube is fixedly installed with a spring sheet, the other end of the spring sheet is fixedly installed with a baffle, the other end of the baffle is fixedly installed with a clamping block, the inner wall of the fixed rod is provided with a clamping groove for the clamping block to be clamped, a small motor is fixedly installed with a threaded rod at the lower end of the small motor, a threaded rod is threadedly connected with a threaded rod seat at the outer end of the threaded rod, a motor is fixedly installed with a motor at the upper end of the threaded rod seat, a rotating rod is fixedly installed in the middle of the lower end of the motor, and a hook is fixedly installed on the lower side of the outer end of the rotating rod. Through the internal structure of the fixed tube, it is convenient to salvage fallen objects such as ropes, and at the same time, it is convenient to wrap and fix to avoid falling off. At the same time, the function of the disassembly hole is to facilitate the disassembly of the device.

[0004] According to the above patent, there is a downhole salvage tool for oil and gas fields, which still has shortcomings in actual use. The most obvious one is that the threaded rod seat and the rotating rod are driven by a small motor to lift and lower, and the rotating rod is driven by a motor to rotate. When the small motor or the motor fails, the equipment will be unable to be used, the maintenance cost is high, and the reliability of the downhole salvage tool is reduced. For this reason, we propose a downhole salvage tool for oil and gas fields. Utility Model Content

[0005] The utility model aims to provide an oil and gas field downhole fishing tool to solve the problems raised in the above background technology.

[0006] In order to achieve the above-mentioned invention object, the utility model provides the following technical solutions:

[0007] The present application is specifically as follows: an oil and gas field downhole salvage tool, comprising: a support seat and a fixed cylinder, the fixed cylinder is fixedly connected to the bottom of the support seat, the top of the support seat is fixedly connected to a telescopic cylinder, the power output end of the telescopic cylinder is fixedly connected to a power shaft, the power shaft passes through the top of the support seat and extends to the inner cavity of the fixed cylinder, the bottom end of the power shaft is rotatably connected to a screw rod, and a salvage piece is arranged at the bottom of the screw rod; a threaded seat is slidably arranged in the inner cavity of the fixed cylinder, a guide piece for guiding the threaded seat is arranged on the fixed cylinder, the screw rod is threadedly connected to the threaded seat, and a limiting piece for limiting the threaded seat is arranged on the fixed cylinder.

[0008] As a preferred technical solution of the present application, the salvage piece includes a rotating rod and a hook, the rotating rod is fixedly connected to the bottom end of the screw rod, and the hooks are in multiple groups and fixedly connected to the outside of the rotating rod.

[0009] As a preferred technical solution of the present application, the guide member includes two groups of guide grooves and two groups of sliders. The two groups of guide grooves are arranged on two sides of the inner cavity of the fixed cylinder away from each other. The slider is slidably connected to the inner cavity of the guide groove, and the slider is fixedly connected to the threaded seat.

[0010] As a preferred technical solution of the present application, a cleaning ring for cleaning the screw rod is fixedly connected to the bottom of the threaded seat.

[0011] As a preferred technical solution of the present application, the limiting member includes a threaded rod, the threaded rod is threadedly connected to one side of the fixing tube, and one end of the threaded rod is fixedly connected to a knob.

[0012] As a preferred technical solution of the present application, a threaded hole is provided on one side of the threaded seat close to the threaded rod, and the threaded rod is threadedly connected to the inner cavity of the threaded hole.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] In the scheme of the present application: when it is necessary to salvage flexible fallen objects such as ropes, the threaded seat is limited in the fixed tube by a limiting member, and the telescopic cylinder drives the screw rod to move downward through the power shaft. Since the screw rod is threadedly connected to the threaded seat and the threaded seat is in a limited state, the screw rod rotates while moving, and the rotating rod and the hook are driven by the screw rod to rotate, which is convenient for winding and fixing flexible fallen objects such as ropes to prevent them from falling off; under normal use, the limiting member is removed, and at this time the threaded seat slides in the fixed tube through the guide member. When the telescopic cylinder drives the screw rod to move downward through the power shaft, the threaded seat will move simultaneously with the screw rod to achieve the salvage of the fallen objects, thereby reducing the use cost and improving the reliability of the downhole salvage tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0016] In the attached picture:

[0017] Figure 1 A stereoscopic diagram of a downhole fishing tool for an oil and gas field provided in this application;

[0018] Figure 2 A bottom-up structural diagram of an oil and gas field downhole fishing tool provided in this application;

[0019] Figure 3 A disassembled structural diagram of a threaded seat of an oil and gas field downhole fishing tool provided in this application;

[0020] Figure 4 A cross-sectional structural diagram of an oil and gas field downhole fishing tool provided in this application.

[0021] In the figure: 100, support seat; 110, telescopic cylinder; 120, power shaft; 130, screw rod; 140, rotating rod; 150, hook; 200, fixed cylinder; 210, guide groove; 211, slider; 220, threaded seat; 221, cleaning ring; 230, threaded rod; 231, knob. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-4A downhole fishing tool for oil and gas fields, comprising: a support seat 100 and a fixed cylinder 200, wherein the fixed cylinder 200 is fixedly connected to the bottom of the support seat 100, a telescopic cylinder 110 is fixedly connected to the top of the support seat 100, and the telescopic cylinder 110 drives a screw rod 130 to move longitudinally through a power shaft 120, and a power output end of the telescopic cylinder 110 is fixedly connected to the power shaft 120, and the power shaft 120 passes through the top of the support seat 100 and extends to the inner cavity of the fixed cylinder 200, and the power shaft 120 is fixedly connected to the inner cavity of the fixed cylinder 200. The bottom end of 20 is rotatably connected with a screw rod 130, which is used to drive the salvage piece to move and rotate, and a salvage piece is arranged at the bottom of the screw rod 130; a threaded seat 220 is slidably arranged in the inner cavity of the fixed tube 200, and the threaded seat 220 is used to connect the screw rod 130. A guide piece for guiding the threaded seat 220 is arranged on the fixed tube 200. The screw rod 130 is threadedly connected with the threaded seat 220, and a limiting piece for limiting the threaded seat 220 is arranged on the fixed tube 200.

[0024] See also Figure 2-4 The salvaging part includes a rotating rod 140 and a hook 150. The rotating rod 140 is fixedly connected to the bottom end of the screw rod 130. The hook 150 is in multiple groups and fixedly connected to the outside of the rotating rod 140. The rotating rod 140 and the hook 150 are used to salvage the object.

[0025] See also Figure 2 and Figure 3 The guide member includes two groups of guide grooves 210 and two groups of sliders 211. The two groups of guide grooves 210 are arranged on two sides of the inner cavity of the fixed cylinder 200 that are far away from each other. The slider 211 is slidably connected to the inner cavity of the guide groove 210. The slider 211 is fixedly connected to the threaded seat 220. The longitudinal movement of the threaded seat 220 is realized by cooperating with the guide groove 210 and the slider 211.

[0026] See also Figure 3 and Figure 4 A cleaning ring 221 for cleaning the screw rod 130 is fixedly connected to the bottom of the threaded seat 220 , and the screw rod 130 is cleaned by the cleaning ring 221 .

[0027] See also Figure 1-4 The limiting member includes a threaded rod 230, which is threadedly connected to one side of the fixed tube 200, and one end of the threaded rod 230 is fixedly connected to a knob 231, which drives the threaded rod 230 to rotate, and the threaded rod 230 cooperates with the threaded hole to limit the threaded seat 220.

[0028] See also Figure 3 and Figure 4 A threaded hole is provided on one side of the threaded seat 220 close to the threaded rod 230 , and the threaded rod 230 is threadedly connected to the inner cavity of the threaded hole. The threaded rod 230 cooperates with the threaded hole to limit the threaded seat 220 .

[0029] Specifically, when the device is in use, the oil and gas field downhole salvage tool is first connected to a power source. When it is necessary to salvage a flexible rope-like fallen object, the knob 231 is rotated, and the knob 231 drives the threaded rod 230 to rotate into the threaded hole, thereby limiting the threaded seat 220. At this time, the telescopic cylinder 110 is started, and the telescopic cylinder 110 drives the power shaft 120 and the screw rod 130 to move downward. The screw rod 130 rotates and moves on the threaded seat 220. At this time, the cleaning ring 221 can clean the screw rod 130 and drive the rotating rod 140 and the hook 150 to rotate, and the flexible rope-like fallen object is salvaged through the hook 150. When the knob 231 drives the threaded rod 230 to rotate and move out of the threaded hole, the threaded seat 220 can slide longitudinally through the guide groove 210 and the slider 211, thereby driving the threaded seat 220, the rotating rod 140 and the hook 150 to move longitudinally through the screw rod 130.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An oil and gas field downhole fishing tool, comprising: A support seat (100) and a fixed cylinder (200), characterized in that the fixed cylinder (200) is fixedly connected to the bottom of the support seat (100), the top of the support seat (100) is fixedly connected to a telescopic cylinder (110), the power output end of the telescopic cylinder (110) is fixedly connected to a power shaft (120), the power shaft (120) passes through the top of the support seat (100) and extends to the inner cavity of the fixed cylinder (200), the bottom end of the power shaft (120) is rotatably connected to a screw rod (130), and a salvage piece is provided at the bottom of the screw rod (130); A threaded seat (220) is slidably disposed in the inner cavity of the fixed cylinder (200), a guide member for guiding the threaded seat (220) is disposed on the fixed cylinder (200), the screw rod (130) is threadedly connected to the threaded seat (220), and a limiting member for limiting the threaded seat (220) is disposed on the fixed cylinder (200).

2. The oil and gas field downhole fishing tool according to claim 1, characterized in that: The fishing piece comprises a rotating rod (140) and a hook (150), wherein the rotating rod (140) is fixedly connected to the bottom end of the screw rod (130), and the hook (150) is in multiple groups and fixedly connected to the outside of the rotating rod (140).

3. The oil and gas field downhole fishing tool according to claim 1, characterized in that: The guide member comprises two groups of guide grooves (210) and two groups of sliders (211); the two groups of guide grooves (210) are arranged on two sides of the inner cavity of the fixed cylinder (200) that are away from each other; the sliders (211) are slidably connected to the inner cavity of the guide grooves (210); and the sliders (211) are fixedly connected to the threaded seat (220).

4. The oil and gas field downhole fishing tool according to claim 1, characterized in that: A cleaning ring (221) for cleaning the screw rod (130) is fixedly connected to the bottom of the threaded seat (220).

5. The oil and gas field downhole fishing tool according to claim 1, characterized in that: The limiting member comprises a threaded rod (230), the threaded rod (230) is threadedly connected to one side of the fixing cylinder (200), and one end of the threaded rod (230) is fixedly connected to a knob (231).

6. The oil and gas field downhole fishing tool according to claim 5, characterized in that: A threaded hole is provided on one side of the threaded seat (220) close to the threaded rod (230), and the threaded rod (230) is threadedly connected to the inner cavity of the threaded hole.

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