A downhole salvage device and method integrating steel wire finding and salvage

Abstract

The present invention relates to the technical field of downhole grabbing tools, and in particular to a downhole salvaging device and method integrating wire search and salvaging, comprising a wire search device and a wire clamping device which are connected in an upper and lower manner, wherein the top of the wire search device is connected to a wire traction end; the wire search comprises a shell, and four sides of the shell are provided with openings, and a driving device is arranged in the shell, and each of the openings is provided with a traction plate arranged in an arc shape and a limiting device for limiting the traction plate from separating from the opening, and the driving device is used to drive the traction plate to slide up and down along the opening, and the lower end of the traction plate passes through the wire clamping device and is provided with a magnetic adsorption block, so as to solve the problem that the broken end of the wire is irregular, resulting in the inability to complete the reinforcement of the salvaged wire after strong magnetic attraction, and the wire is very easy to separate when being stretched.

Description

Technical Field

[0001] The invention relates to the technical field of downhole fishing tools, and in particular to a downhole fishing device and method integrating wire finding and fishing. Background Art

[0002] Downhole salvage tools are special tools used to salvage fallen objects. They come in many varieties and specifications and are the most widely used and most frequently used tools in oil and gas well construction.

[0003] For example, in the process of oil and gas field exploration and development, especially in wireline operations such as throwing and fishing throttles, fishing oil pipe bridge plugs, downhole cutting, and well cleaning, the downhole tools may get stuck and the wire may break when being pulled up to release the jam.

[0004] Conventional operation is to use a barbed spear salvage tool, which cannot hold the wire firmly and is easily dislodged, resulting in low salvage efficiency.

[0005] In response to this problem, the application number is 202110570314.5. The name of the invention is a downhole steel wire salvage tool and a method of using it. Through the effective setting of the cylinder, center tube, upper cover, movable frame, clamping mechanism, and adsorption mechanism, the steel wire transmission lifting and lowering method is adopted to detect fish, catch fish, unblock and salvage, and release. Specifically, the steel wire end that falls into the well is attracted by strong magnetism to enter the pre-stuck position of the slip, and then the steel wire is clamped by the clamping mechanism. It has the advantages of being tighter and tighter, easy to lose, and unlimited repeated salvage in the well, overcoming the problem that the existing steel wire salvage tools are easy to lose when lifted, so as to achieve the purpose of improving the success rate of salvage and reducing construction costs. It is suitable for salvage of steel wires of various diameters in the well, and has a wide range of applications. However, in actual operation, the broken end of the broken steel wire is often irregular, which makes it easy to get stuck on the outside of the pre-stuck position of the slip after strong magnetic attraction, and it is impossible to complete the reinforcement of the salvage steel wire, and it is very easy to detach when the steel wire is stretched. Summary of the invention

[0006] The purpose of the present invention is to provide an underground salvage device and method integrating wire searching and salvaging, so as to solve the problem that the salvaged wire cannot be reinforced after strong magnetic attraction due to the irregular broken end of the wire, and is very easy to detach when stretched.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] An underground fishing device integrating wire search and fishing, comprising a wire search device and a wire clamping device connected in an upper and lower manner, wherein the top of the wire search device is connected to a wire pulling end;

[0009] The wire searching device comprises a shell, and opening slits are arranged on the four sides of the shell. A driving device is arranged in the shell, and each of the opening slits is provided with an arc-shaped traction plate and a limiting device for limiting the traction plate from escaping from the opening slit. The driving device is used to drive the traction plate to slide up and down along the opening slit. The lower end of the traction plate passes through the wire clamping device and is provided with a magnetic adsorption block.

[0010] A further technical solution is that the driving device includes a motor arranged in the shell, the output end of the motor is provided with a helical gear plate, and the end of the traction plate facing the inner side of the shell is provided with a helical gear meshing with the helical gear plate.

[0011] A further technical solution is that the limiting device includes a rotating shaft, which is laterally fixed in the opening gap, and a limiting wheel is rotatably provided on the rotating shaft, and an arc-shaped groove is provided at one end of the traction plate away from the inner side of the shell, and a part of the limiting wheel is slidably set in the arc-shaped groove.

[0012] A further technical solution is that the wire clamping device comprises a base plate, and a first hydraulic telescopic rod and a second hydraulic telescopic rod are provided at the lower end of the base plate, both of which are provided in two quantities;

[0013] First hinge plates are provided on both sides of the lower left end of the base plate, and the upper ends of the two first hinge plates are rotatably connected to the pistons of the two first hydraulic telescopic rods respectively;

[0014] Second hinge plates are provided on both sides of the lower end of the right side of the base plate, and the upper ends of the two second hinge plates are rotatably connected to the pistons of the two second hydraulic telescopic rods respectively;

[0015] Two guide rails are arranged at intervals at the lower end of the base plate, the lower ends of the first hinge plate and the second hinge plate are connected to the two guide rails respectively, and a plurality of clamps with adjustable spacing are arranged on the two guide rails;

[0016] A first fixed shaft and a second fixed shaft connected to the base plate are provided at the lower end of the base plate and the upper end of the guide rail. The two first hinge plates are rotatably connected to the first fixed shaft, and the two second hinge plates are rotatably connected to the second fixed shaft.

[0017] A further technical solution is that a T-shaped groove is provided at the lower end of the guide rail, and the clamp includes a slider slidably arranged in the T-shaped groove, a pad is provided at the lower end of the guide rail, a through hole is provided on the pad, a screw is fixed at the lower end of the slider, the lower end of the screw passes through the through hole and is threadedly connected with a fixing nut, and the lower end of the screw is provided with an arc-shaped end and a clamping rod connected to the arc-shaped end.

[0018] A further technical solution is that the clamping rod is a column, and the diameter of the clamping rod gradually decreases from a side close to the arc-shaped end toward a side away from the arc-shaped end.

[0019] A further technical solution is that a plurality of clamping teeth are provided at the upper end of the clamping rod, and the clamping teeth are in the shape of a right-angled triangular prism arranged horizontally, and the right-angled end of the clamping tooth is arranged toward a side away from the arc-shaped end, the right-angled end of the clamping tooth is provided with an arc-shaped portion, and the top of the clamping tooth is in the shape of a spike.

[0020] An underground fishing method integrating wire finding and fishing, comprising the following method steps;

[0021] Step 1: Place the downhole salvage device in the salvage area through the wire traction end:

[0022] Step 2: Control the motor to rotate, the motor drives the bevel gear plate to rotate, the bevel gear plate drives the traction plate to slide downward in the open slot, so that the lower ends of the four traction plates are dispersed, and the steel wire to be salvaged is adsorbed by the magnetic adsorption block at the lower end of the traction plate, and then the motor is controlled to rotate in the opposite direction, so that the traction plate slides upward in the open slot, driving the steel wire adsorbed by the magnetic adsorption block to gather;

[0023] Step 3: After the steel wire adsorbed by the magnetic adsorption block is gathered, the first hydraulic telescopic rod and the second hydraulic telescopic rod are controlled to work, so as to drive the clamps on both sides to move toward each other and clamp the steel wire firmly;

[0024] Step 4: Lift the traction end of the wire and collect the salvaged wire.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The steel wire to be salvaged is adsorbed by the magnetic adsorption block at the lower end of the traction plate, and then the steel wire is clamped by the steel wire clamping device, which makes it easy to salvage the steel wire. The four magnetic adsorption blocks expand the range of searching and salvaging the steel wire, and then the steel wire is clamped by the steel wire clamping device to prevent the steel wire from detaching during the lifting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The present invention is a schematic structural diagram of an underground fishing device and method integrating wire finding and fishing.

[0028] Figure 2 for Figure 1 A partial enlarged schematic diagram in the middle.

[0029] Figure 3 It is a schematic diagram of the connection between the bevel gear plate and the traction plate in the present invention.

[0030] Figure 4It is a partial bottom view of the wire clamping device in the present invention.

[0031] Figure 5 It is a schematic diagram of the connection between the guide rail and the clamp in the present invention.

[0032] Figure 6 It is a schematic diagram of the structure of the clamping teeth in the present invention. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0034] Embodiment 1:

[0035] Figure 1-6 A preferred embodiment of a downhole salvage device integrating wire search and salvage of the present invention is shown. In this embodiment, a downhole salvage device integrating wire search and salvage specifically comprises a wire search device and a wire clamping device connected in an upper and lower manner, and a wire traction end 1 is connected to the top of the wire search device;

[0036] The steel wire searching device comprises a shell 2, and opening slits 3 are provided on the four sides of the shell 2. A driving device is provided in the shell 2, and each of the opening slits 3 is provided with an arc-shaped traction plate 4 and a limiting device for limiting the traction plate 4 from escaping from the opening slit 3. The driving device is used to drive the traction plate 4 to slide up and down along the opening slit 3. The lower end of the traction plate 4 passes through the steel wire clamping device and is provided with a magnetic adsorption block 5.

[0037] The driving device includes a motor 6 arranged in the housing 2, and a beveled toothed disk 7 is provided at the output end of the motor 6. The end of the traction plate 4 facing the inner side of the housing 2 is provided with a bevel gear 8 meshing with the beveled toothed disk 7. The motor 6 rotates to drive the beveled toothed disk 7 connected to the output end of the motor 6 to rotate. The four traction plates 4 are provided with beveled gears 8 meshing with the beveled toothed disk 7, that is, the four traction plates 4 are driven to rotate in the up and down directions of the opening slit 3 at the same time through the beveled toothed disk 7.

[0038] For example, when searching for and salvaging steel wires underground, the motor 6 rotates to cause the four traction plates 4 to move downward in the open slot 3. At this time, the magnetic adsorption blocks 5 connected to the lower ends of the traction plates 4 move toward ends away from each other. Compared with a single magnetic adsorption block 5, this design increases the range of steel wire search and salvage, and facilitates the one-time adsorption of multiple steel wires, thereby greatly improving the efficiency of steel wire salvage.

[0039] The limiting device includes a rotating shaft 9, which is laterally fixed in the opening slot 3, and a limiting wheel 10 is rotatably provided on the rotating shaft 9. An arc-shaped groove 11 is provided at one end of the traction plate 4 away from the inner side of the shell 2, and a part of the limiting wheel 10 is slidably set in the arc-shaped groove 11. By always sliding a part of the limiting wheel 10 in the arc-shaped groove 11, it is ensured that the bevel gear 8 on the traction plate 4 is always meshed and connected with the bevel gear plate 7 during the traction plate 4 moves up and down in the opening slot 3.

[0040] Example 2

[0041] The wire clamping device comprises a base plate 12, and two first hydraulic telescopic rods 13 and second hydraulic telescopic rods 14 are arranged at the lower end of the base plate 12;

[0042] First hinge plates 15 are provided on both sides of the lower left end of the base plate 12, and the upper ends of the two first hinge plates 15 are rotatably connected to the pistons of the two first hydraulic telescopic rods 13 respectively;

[0043] A second hinge plate 16 is provided on both sides of the lower right end of the base plate 12, and the upper ends of the two second hinge plates 16 are rotatably connected to the pistons of the two second hydraulic telescopic rods 14 respectively;

[0044] Two guide rails 17 are arranged at intervals at the lower end of the base plate 12, the lower ends of the first hinge plate 15 and the second hinge plate 16 are connected to the two guide rails 17 respectively, and a plurality of clamps 18 with adjustable spacing are arranged on the two guide rails 17;

[0045] A first fixed shaft 19 and a second fixed shaft 20 connected to the base plate 12 are provided at the lower end of the base plate 12 and the upper end of the guide rail 17 , the two first hinge plates 15 are rotatably connected to the first fixed shaft 19 , and the two second hinge plates 16 are rotatably connected to the second fixed shaft 20 .

[0046] During the process of salvaging the steel wire by means of the magnetic adsorption block 5, the first hydraulic telescopic rod 13 and the second hydraulic telescopic rod 14 are in a contracted state, at which time the guide rail 17 connected by the first hinge plate 15 and the guide rail 17 connected by the second hinge plate 16 move toward one end away from each other, to avoid contact between the clamp 18 and the salvaged steel wire, which would cause the steel wire to fall off; when the magnetic adsorption block 5 moves upward with the traction plate 4, the piston ends of the first hydraulic telescopic rod 13 and the second hydraulic telescopic rod 14 are controlled to extend, driving the clamps 18 on the two guide rails 17 to move toward each other, and fixing the steel wire by means of a plurality of clamps 18; in this process, even if the broken end of the steel wire is in an irregular shape, the steel wire can be reinforced by the clamp 18, to avoid the steel wire from falling off during the lifting process, thereby improving the steel wire salvage efficiency.

[0047] A T-shaped slot 21 is provided at the lower end of the guide rail 17, and the clamp 18 includes a slider 22 slidably arranged in the T-shaped slot 21. A pad 23 is provided at the lower end of the guide rail 17, and a through hole is provided on the pad 23. A screw rod 24 is fixedly provided at the lower end of the slider 22, and the lower end of the screw rod 24 passes through the through hole and is threadedly connected with a fixing nut 25. The lower end of the screw rod 24 is provided with an arc-shaped end and a clamping rod 26 connected to the arc-shaped end. By adjusting the gap between two adjacent sliders 22, the gap between adjacent clamping rods 26 can be adjusted to facilitate clamping of steel bars of different diameters.

[0048] The clamping rod 26 is a column, and the diameter of the clamping rod 26 gradually decreases from the side close to the arc-shaped end toward the side away from the arc-shaped end, so that the clamping rod 26 arranged on the two guide rails 17 can reduce the contact area with the steel wire when it contacts the steel wire. At the same time, the multiple clamping rods 26 arranged on both sides of the guide rails 17 are staggered, so that the clamping rods 26 on the two guide rails 17 can clamp the steel wire when they contact each other. At the same time, the upper end of the clamping rod 26 is provided with a plurality of clamping teeth 27, and the clamping teeth 27 are in the shape of a right-angled triangular prism arranged horizontally, and the right-angled end of the clamping tooth 27 is arranged toward the side away from the arc-shaped end, and the right-angled end of the clamping tooth 27 is provided with an arc-shaped portion 28, refer to Figure 5 As shown, the right side of the clamping tooth 27 is a right-angle end. When the clamp 18 is clamping the steel wire, the arc portion 28 reduces the resistance to contact with the steel wire when the clamping rods 26 on both sides are cross-connected, and the top of the clamping tooth 27 is in a spike shape, that is, in the process of lifting the steel wire, the top of the clamping tooth 27 is in a spike shape and contacts with the steel wire, thereby making the clamping rods 26 on both sides of the steel wire tightly connected to the steel wire, and also preventing the steel wire from being separated from the clamping rod 26 during the lifting process.

[0049] Example 3

[0050] An underground fishing method integrating wire finding and fishing, comprising the following method steps;

[0051] Step 1: Place the downhole salvage device in the salvage area through the wire traction end 1:

[0052] Step 2: Control the motor 6 to rotate, the motor 6 drives the bevel gear plate 7 to rotate, the bevel gear plate 7 drives the traction plate 4 to slide downward in the open slot 3, so that the lower ends of the four traction plates 4 are dispersed, and the steel wire to be salvaged is adsorbed by the magnetic adsorption block 5 at the lower end of the traction plate 4, and then the motor 6 is controlled to rotate in the opposite direction, so that the traction plate 4 slides upward in the open slot 3, driving the steel wire adsorbed by the magnetic adsorption block 5 to gather;

[0053] Step 3: After the steel wire adsorbed by the magnetic adsorption block 5 is gathered, the first hydraulic telescopic rod 13 and the second hydraulic telescopic rod 14 are controlled to work, so as to drive the clamps 18 on both sides to move toward each other and clamp the steel wire firmly;

[0054] Step 4: Lift the wire traction end 1 and collect the salvaged wire.

[0055] Although the present invention is described herein with reference to a number of illustrative embodiments of the present invention, it will be appreciated that those skilled in the art may devise many other modifications and implementations that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the present disclosure, drawings, and claims, a variety of variations and modifications may be made to the components and / or layout of the subject combination layout. In addition to the variations and modifications made to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. A downhole fishing device integrating wire finding and fishing, characterized in that: It comprises a wire search device and a wire clamping device which are connected up and down, and the top of the wire search device is connected to a wire traction end; The steel wire search device comprises a shell, four sides of the shell are provided with opening slots, a driving device is provided in the shell, each of the opening slots is provided with an arc-shaped traction plate and a limiting device for limiting the traction plate from leaving the opening slot, the driving device is used to drive the traction plate to slide up and down along the opening slot, the lower end of the traction plate passes through the steel wire clamping device and is provided with a magnetic adsorption block; The driving device comprises a motor arranged in the housing, the output end of the motor is provided with a helical gear plate, and the end of the traction plate facing the inner side of the housing is provided with a helical gear meshing with the helical gear plate; The limiting device comprises a rotating shaft, which is transversely fixedly arranged in the opening slot, and a limiting wheel is rotatably arranged on the rotating shaft, an arc-shaped groove is arranged at one end of the traction plate away from the inner side of the shell, and a part of the limiting wheel is slidably arranged in the arc-shaped groove; The wire clamping device comprises a base plate, and two first hydraulic telescopic rods and two second hydraulic telescopic rods are arranged at the lower end of the base plate; First hinge plates are provided on both sides of the lower left end of the base plate, and the upper ends of the two first hinge plates are rotatably connected to the pistons of the two first hydraulic telescopic rods respectively; Second hinge plates are provided on both sides of the lower end of the right side of the base plate, and the upper ends of the two second hinge plates are rotatably connected to the pistons of the two second hydraulic telescopic rods respectively; Two guide rails are arranged at intervals at the lower end of the base plate, the lower ends of the first hinge plate and the second hinge plate are connected to the two guide rails respectively, and a plurality of clamps with adjustable spacing are arranged on the two guide rails; A first fixed shaft and a second fixed shaft connected to the base plate are provided at the lower end of the base plate and the upper end of the guide rail. The two first hinge plates are rotatably connected to the first fixed shaft, and the two second hinge plates are rotatably connected to the second fixed shaft.

2. The downhole fishing device integrating wire finding and fishing according to claim 1, characterized in that: A T-shaped groove is provided at the lower end of the guide rail, and the clamp includes a slider slidably arranged in the T-shaped groove. A pad is provided at the lower end of the guide rail, and a through hole is provided on the pad. A screw is fixedly provided at the lower end of the slider, and the lower end of the screw passes through the through hole and is threadedly connected with a fixing nut. The lower end of the screw is provided with an arc-shaped end and a clamping rod connected to the arc-shaped end.

3. The downhole fishing device integrating wire finding and fishing according to claim 2, characterized in that: The clamping rod is a column, and the diameter of the clamping rod gradually decreases from a side close to the arc-shaped end toward a side away from the arc-shaped end.

4. The downhole fishing device integrating wire finding and fishing according to claim 3 is characterized in that: The upper end of the clamp rod is provided with a plurality of clamping teeth, the clamping teeth are in the shape of a right-angled triangular prism arranged horizontally, and the right-angled end of the clamping teeth is arranged toward a side away from the arc-shaped end, the right-angled end of the clamping teeth is provided with an arc-shaped portion, and the top of the clamping teeth is in the shape of a spike.

5. A downhole salvage method integrating wire finding and salvaging, comprising a downhole salvage device integrating wire finding and salvaging as claimed in any one of claims 1 to 4, characterized in that: The method comprises the following steps; Step 1: Place the downhole salvage device in the salvage area through the wire traction end: Step 2: Control the motor to rotate, the motor drives the bevel gear plate to rotate, the bevel gear plate drives the traction plate to slide downward in the open slot, so that the lower ends of the four traction plates are dispersed, and the steel wire to be salvaged is adsorbed by the magnetic adsorption block at the lower end of the traction plate, and then the motor is controlled to rotate in the opposite direction, so that the traction plate slides upward in the open slot, driving the steel wire adsorbed by the magnetic adsorption block to gather; Step 3: After the steel wire adsorbed by the magnetic adsorption block is gathered, the first hydraulic telescopic rod and the second hydraulic telescopic rod are controlled to work, so as to drive the clamps on both sides to move toward each other and clamp the steel wire firmly; Step 4: Lift the traction end of the wire and collect the salvaged wire.

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