Oil field underground fisher

Abstract

The invention belongs to the technical field of oil field equipment, and provides an oil field underground fisher which comprises a fishing platform, a driving assembly and a fishing assembly, the driving assembly is installed on the fishing platform, and the driving assembly is connected with the fishing assembly; the salvage assembly comprises a salvage cylinder, a salvage manipulator is installed at the bottom of the salvage cylinder and comprises a plurality of mechanical arms distributed around the circumference of the bottom face of the salvage cylinder, and mechanical claws are installed at the ends of the mechanical arms; a single manipulator can be used for salvaging small objects, a plurality of manipulators can be matched to form a net to salvage large objects, various objects can be salvaged, the manipulator can be folded and stored in the salvaging cylinder after salvaging operation, and transportation and storage are facilitated.

Description

Technical Field

[0001] The present invention belongs to the technical field of oilfield equipment, and particularly relates to an oilfield downhole fishing tool. Background Art

[0002] Fishing in oil and water wells is a basic operation in workover construction, including technologies such as fishing and major repair. According to the classification of downhole debris in the well, fishing tools are divided into six major categories: pipe fishing tools, rod fishing tools, cable fishing tools, small object fishing tools, logging instrument fishing tools, internal and external groove combination tools, and through-hole fishing tools. According to different downhole debris in the well, corresponding fishing tools and process measures are adopted to fish out the debris and enable the normal production of oil and water wells.

[0003] Oil extraction refers to the act of excavating and extracting oil in places where oil is stored. During the process of oil extraction, the driving mode of oil and gas flowing from the reservoir into the bottom of the well and then rising from the bottom of the well to the wellhead.

[0004] Oil is a fluid mineral buried deep underground. In the related art, during the process of oilfield development, downhole fishing is a necessary link.

[0005] The patent document with the publication number CN216922062U discloses an oilfield downhole hydraulic fishing device that is easy to construct and has stable connection. By the downward movement of the moving disk, the bottom end of the rotating rod moves towards the separated side. The movement of the rotating rod further causes the bottom end of the rotating bracket to rotate between the opposite sides. The movement of the rotating bracket drives the fixing member to move between the opposite sides, thereby fixing the object to be fished in the oilfield downhole. The structure is simple, convenient for production, and has a good fixing effect on the object to be fished. By rotating the threaded rod, the limiting block moves to the right, and the hydraulic support rod is fixed by the movement of the limiting block, effectively avoiding the problem of the device shaking during operation and improving the stability of the device during operation.

[0006] Although the above-mentioned oilfield downhole hydraulic fishing device that is easy to construct and has stable connection can solve the corresponding technical problems, basically all existing extension tools are directly installed at the end of the fishing tool, and different fishing tools are used for different objects. Therefore, it is often necessary to frequently replace the fishing tool, resulting in a cumbersome fishing process. How to improve the fishing equipment to be applicable to the fishing work of various objects is a technical problem to be solved. Summary of the Invention

[0007] To solve at least one of the technical problems existing in the above-mentioned background art, the present invention provides an oilfield downhole fishing tool, including: a fishing platform, a driving component, and a fishing component. The driving component is installed on the fishing platform, and the driving component is connected to the fishing component; the fishing platform includes an installation table, on the upper surface of the installation table, there are a motor mounting seat and a tractor mounting seat, in the center of the installation table, there is a towing rope through hole, and on the lower surface of the installation table, there are a plurality of lifting seats, and the lifting seats can be composed of hydraulic lifting rods and support bases.

[0008] The driving component includes a tractor and a traction motor. The tractor is connected to the traction motor, and a towing rope is wound around the tractor. One end of the towing rope is connected to the fishing component, and the fishing component uses the towing rope to enter the well for fishing operations.

[0009] The fishing component includes a fishing barrel. Guide wheels are installed on the outer surface of the fishing barrel. The guide wheels are fixed on the outer surface of the fishing barrel through guide wheel mounting plates. The guide wheels are used for guiding and preventing the fishing barrel from being too close to the well wall and causing frictional damage. At a set position on the outer surface of the fishing barrel away from the guide wheels, there is a buffer plate. Tooth-shaped protrusions are arranged on the outer side of the buffer plate. The buffer plate is used to buffer the fishing barrel when the guide wheels are worn or fall off, so as to prevent the support barrel from directly contacting the well wall and causing equipment damage; a fishing manipulator is installed at the bottom of the fishing barrel. The fishing manipulator includes a plurality of robotic arms arranged around the circumference of the bottom surface of the fishing barrel. Mechanical claws are installed at the ends of the robotic arms. When the fishing operation is completed, the fishing manipulator can be retracted into the fishing barrel for easy transportation and storage.

[0010] The robotic arm includes an angle adjustment arm and a rotating support arm. The angle adjustment arm is installed on the support frame on the lower surface of the fishing barrel through a first rotating shaft. The angle adjustment arm can rotate around the first rotating shaft. One end of the first rotating shaft is installed with a first driving motor, and the first driving motor can drive the first rotating shaft to rotate to adjust the angle of the angle adjustment arm; the other end of the angle adjustment arm is installed with a second rotating shaft. One end of the second rotating shaft is connected to the first output end of the second driving motor. A rotating support arm is installed on the second rotating shaft. The rotating support arm includes a support arm, a driving arm, and a rotating rod. The support arm is installed on the second rotating shaft. The other end of the support arm is connected to a third rotating shaft. A mechanical claw is installed on the third rotating shaft. The driving arm is also installed on the second rotating shaft. The other end of the driving arm is installed with one end of the rotating rod. The other end of the rotating rod is connected to the mechanical claw, and the driving arm is used to drive the mechanical claw to rotate.

[0011] The driving arm includes a driving inner tube, a spring piece, and a driving outer tube. The driving inner tube is installed on the second rotating shaft. One end of the driving inner tube is connected to the second output end of the second driving motor. A plurality of spring pieces are arrayed and installed on the outer side surface of the driving inner tube. One end of the spring piece is connected to the driving outer tube. The driving inner tube can drive the driving outer tube to rotate. The spring piece is used to buffer the rotation of the driving outer tube to reduce damage to the driving inner tube. A first hinge support is installed on the outer side surface of the driving outer tube. One end of the first hinge support is connected to one end of a rotating rod, and the other end of the rotating rod is connected to a second hinge support. The second hinge support is installed on the third rotating shaft.

[0012] The mechanical claw can be a gear-type mechanical claw, a clamp-type mechanical claw, or a magnetic adsorption-type mechanical claw. It can also be a shovel-shaped mechanical claw formed by a frame structure. A magnet material is provided at the end of the shovel-shaped mechanical claw, which can adsorb metal particles. Multiple shovel-shaped mechanical claws can form a network to cooperate in grasping and salvaging.

[0013] The beneficial effects of the present invention are as follows: The present invention provides an oilfield downhole salvage tool, including: a salvage platform, a driving component, and a salvage component. The driving component is installed on the salvage platform, and the driving component is connected to the salvage component. The salvage platform is installed at the wellhead to be salvaged. The salvage cylinder is lowered along the wellhead into the well by a tractor to salvage objects. Specifically, the angle of the manipulator can be adjusted by the angle adjustment arm and the rotating support arm. A single manipulator can be used to salvage small objects, such as magnetic adsorption salvage of metal particles or clamping salvage of metal parts. Multiple manipulators can also cooperate to form a network to salvage larger objects. It can salvage a variety of objects. After the salvage operation, it can be folded and stored inside the salvage cylinder, which is convenient for transportation and storage.

[0014] The advantages of the additional aspects of the present invention will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The specification drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0016] Figure 1 It is a schematic structural diagram of an oilfield downhole salvage tool of the present invention; Figure 2 It is a schematic structural diagram of the salvage cylinder of the present invention; Figure 3 It is a schematic structural diagram of the salvage manipulator of the present invention; Wherein: 1. Tractor; 2. Traction motor; 3. Lifting seat; 4. Installation platform; 5. Fishing barrel; 6. Fishing manipulator; 51. Guide wheel mounting plate; 52. Guide wheel; 53. Buffer plate; 601. First rotating shaft; 602. Angle adjusting arm; 603. Driving outer tube; 604. First hinge support; 605. Second rotating shaft; 606. Rotating support arm; 607. Rotating rod; 608. Second hinge support; 609. Spring piece; 610. Driving inner tube; 611. Third rotating shaft; 612. Mechanical claw; 613. First driving motor; 614. Second driving motor. Detailed implementation manners

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further descriptions of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0019] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary implementation manners of the present invention. As used herein, unless otherwise clearly specified in the context, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0020] In the present invention, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only relationship terms determined for the convenience of describing the structural relationship of each component or element of the present invention and do not specifically refer to any component or element in the present invention and should not be construed as a limitation on the present invention.

[0021] In the present invention, terms such as "fixed connection", "connected", "connection", etc. should be understood in a broad sense, indicating that it can be a fixed connection, an integral connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate medium. For relevant scientific research or technical personnel in this field, the specific meanings of the above terms in the present invention can be determined according to specific circumstances and should not be construed as a limitation on the present invention.

[0022] Such as Figures 1 - 3As shown in the figure, this embodiment provides an oilfield downhole fishing tool, which includes: a fishing platform, a driving component and a fishing component. The driving component is installed on the fishing platform, and the driving component is connected to the fishing component; the fishing platform includes a mounting table 4, on the upper surface of the mounting table 4, there are a motor mounting seat and a tractor 1 mounting seat, in the center of the mounting table 4, there is a towing rope through hole, and on the lower surface of the mounting table 4, there are a plurality of lifting seats 3, and the lifting seats 3 can be composed of hydraulic lifting rods and support bases.

[0023] The driving component includes a tractor 1 and a traction motor 2. The tractor 1 is connected to the traction motor 2. A towing rope is wound around the tractor 1. One end of the towing rope is connected to the fishing component, and the fishing component uses the towing rope to enter the well for fishing work.

[0024] The fishing component includes a fishing barrel 5. On the outer surface of the fishing barrel 5, a guide wheel 52 is installed. The guide wheel 52 is fixed on the outer surface of the fishing barrel 5 through a guide wheel mounting plate 51. The guide wheel 52 is used for guiding and avoiding friction damage caused by the fishing barrel 5 being too close to the well wall. At a set position on the outer surface of the fishing barrel 5 away from the guide wheel 52, a buffer plate 53 is provided. On the outer side of the buffer plate 53, there are tooth-shaped protrusions. The buffer plate 53 is used to buffer the fishing barrel 5 when the guide wheel 52 is worn or falls off, so as to prevent the support barrel from directly contacting the well wall and causing equipment damage; inside the fishing barrel 5, there is a chute, on the chute, there is a storage slider, and the storage slider slides up and down through a screw mechanism. At the bottom of the storage slider, a fishing manipulator 6 is installed. The fishing manipulator 6 includes a plurality of robotic arms arranged around the circumference of the bottom surface of the fishing barrel 5. At the end of the robotic arm, a mechanical claw 612 is installed. When the fishing work is over, by rotating the screw mechanism, the storage slider moves upward along the chute under the screw mechanism, and the fishing manipulator 6 can be retracted into the fishing barrel 5 for easy transportation and storage; the screw mechanism includes a motor and a screw. The screw passes through the mounting hole of the storage slider, and the motor drives the screw to rotate, and the rotation of the screw drives the storage slider to slide along the chute.

[0025] The robotic arm includes an angle adjustment arm 602 and a rotating support arm 606. The angle adjustment arm 602 is installed on the support frame on the lower surface of the fishing barrel 5 through a first rotating shaft 601. The angle adjustment arm 602 can rotate around the first rotating shaft 601. One end of the first rotating shaft 601 is installed with a first driving motor 613, and the first driving motor 613 can drive the first rotating shaft 601 to rotate to adjust the angle of the angle adjustment arm 602; the other end of the angle adjustment arm 602 is installed with a second rotating shaft 605. One end of the second rotating shaft 605 is connected to the first output end of the second driving motor 614. A rotating support arm 606 is installed on the second rotating shaft 605. The rotating support arm 606 includes a support arm, a driving arm, and a rotating rod 607. The support arm is installed on the second rotating shaft 605. The other end of the support arm is connected to a third rotating shaft 611. A mechanical claw 612 is installed on the third rotating shaft 611. The driving arm is also installed on the second rotating shaft 605. The other end of the driving arm is installed with one end of the rotating rod 607. The other end of the rotating rod 607 is connected to the mechanical claw 612, and the driving arm is used to drive the mechanical claw 612 to rotate.

[0026] The driving arm includes a driving inner tube 610, a spring piece 609, and a driving outer tube 603. The driving inner tube 610 is installed on the second rotating shaft 605. One end of the driving inner tube 610 is connected to the second output end of the second driving motor 614. A plurality of spring pieces 609 are installed on the outer side surface of the driving inner tube 610 in an array. One end of the spring piece 609 is connected to the driving outer tube 603. The driving inner tube 610 can drive the driving outer tube 603 to rotate. The spring piece 609 is used to buffer the rotation of the driving outer tube 603. When the size of the clamped object is large or it is stuck, the buffer force can effectively prevent the equipment from being damaged by a large pulling force. For example, when the bottom sediment is stuck by a rock, if it is forcibly pulled out, it will surely cause great damage to the equipment. The buffer structure is adopted. During the dragging process after clamping, if the force is too large, the spring piece will adaptively adjust the angle to make the object slide out, protecting the stability of the equipment, effectively reducing equipment damage, and ensuring long-term stable and effective operation; a first hinge support 604 is installed on the outer side surface of the driving outer tube 603. The first hinge support 604 is connected to one end of the rotating rod 607. The other end of the rotating rod 607 is connected to the second hinge support 608. The second hinge support 608 is installed on the third rotating shaft 611.

[0027] The mechanical claw 612 can be a gear-type mechanical claw, a clamp-type mechanical claw or a magnetic adsorption-type mechanical claw. A shovel-shaped mechanical claw formed by a framework can also be used. A magnetic material is arranged at the end of the shovel-shaped mechanical claw, which can adsorb metal particles. Multiple shovel-shaped mechanical claws can form a net to cooperate for grasping and salvaging. A monitoring camera and a searchlight are installed on the side of the mechanical claw 612. By using the monitoring camera, information of the object to be salvaged in the oil well is collected, and the position of the object to be salvaged can be observed. The searchlight is used for lighting, so that the monitoring camera can collect and shoot clearer pictures, thereby determining the size and structure of the salvaged object, and correspondingly setting the number and clamping angle of the mechanical claw 612 that cooperates with it, so as to effectively salvage the object. During this period, the set driving arm can be used to reduce the equipment damage during the salvage process. If the size of the object is too large or it is stuck by a heavy object and cannot be salvaged completely, corresponding countermeasures can be taken. For example, a drilling or cutting device can be used to disassemble and cut the object before salvage operation.

[0028] During operation, the salvage platform is installed at the wellhead to be salvaged, and the salvage cylinder 5 is lowered into the well along the wellhead by the tractor 1 to salvage the object. Specifically, the angle of the manipulator can be adjusted by the angle adjustment arm 602 and the rotating support arm 606. A single manipulator can be used to magnetically salvage small objects, such as metal particles, or clamp and salvage metal parts. Multiple manipulators can also be used in cooperation to form a net to salvage larger objects. After the salvage operation, it can be folded and stored back inside the salvage cylinder 5.

[0029] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An oilfield downhole fishing device, characterized in that: include: A salvage platform, a drive assembly and a salvage assembly, wherein the drive assembly is installed on the salvage platform, and the drive assembly is connected to the salvage assembly; The salvage platform comprises a mounting platform (4), the upper surface of the mounting platform (4) is provided with a motor mounting seat and a traction machine (1) mounting seat, the center of the mounting platform (4) is provided with a traction rope through hole, and the lower surface of the mounting platform (4) is provided with a plurality of lifting seats (3); The driving assembly comprises a traction machine (1) and a traction motor (2), the traction machine (1) being connected to the traction motor (2), a traction rope being wound around the traction machine (1), one end of the traction rope being connected to a salvage assembly, and the salvage assembly using the traction rope to enter the well to perform salvage work; The salvage assembly comprises a salvage tube (5), a guide wheel (52) is installed on the outer surface of the salvage tube (5), the guide wheel (52) is fixed to the outer surface of the salvage tube (5) through a guide wheel mounting plate (51), the guide wheel (52) is used for guiding and preventing the salvage tube (5) from being too close to the well wall and causing friction damage, and a buffer plate (53) is provided on the outer surface of the salvage tube (5) at a set position away from the guide wheel (52); a salvage manipulator (6) is installed at the bottom of the salvage tube (5), the salvage manipulator (6) comprises a plurality of mechanical arms arranged around the circumference of the bottom surface of the salvage tube (5), and mechanical claws (612) are installed at the ends of the mechanical arms.

2. An oilfield downhole fishing device as claimed in claim 1, characterized in that: The mechanical arm comprises an angle adjustment arm (602) and a rotation support arm (606); the angle adjustment arm (602) is mounted on a support frame on the lower surface of the salvage tube (5) via a first rotation shaft (601); the angle adjustment arm (602) can rotate around the first rotation shaft (601); a first drive motor (613) is mounted on one end of the first rotation shaft (601); the first drive motor (613) can drive the first rotation shaft (601) to rotate so as to adjust the angle of the angle adjustment arm (602); a second rotation shaft (605) is mounted on the other end of the angle adjustment arm (602); one end of the second rotation shaft (605) is connected to a first output end of a second drive motor (614); and the rotation support arm (606) is mounted on the second rotation shaft (605).

3. An oilfield downhole fishing device as claimed in claim 2, characterized in that: The rotating support arm (606) comprises a supporting arm, a driving arm and a rotating rod (607); the supporting arm is mounted on the second rotating shaft (605); the other end of the supporting arm is connected to the third rotating shaft (611); a mechanical claw (612) is mounted on the third rotating shaft (611); the driving arm is also mounted on the second rotating shaft (605); one end of the rotating rod (607) is mounted on the other end of the driving arm; the other end of the rotating rod (607) is connected to the mechanical claw (612); the driving arm is used to drive the mechanical claw (612) to rotate.

4. The oilfield downhole fishing device according to claim 1, characterized in that: The driving arm comprises a driving inner tube (610), a spring sheet (609) and a driving outer tube (603); the driving inner tube (610) is mounted on the second rotating shaft (605); one end of the driving inner tube (610) is connected to the second output end of the second driving motor (614); a plurality of spring sheets (609) are mounted in an array on the outer side surface of the driving inner tube (610); one end of the spring sheet (609) is connected to the driving outer tube (603); the driving inner tube (610) can drive the driving outer tube (603) to rotate; the spring sheet (609) is used to buffer the rotation of the driving outer tube (603); a first hinge support (604) is mounted on the outer side surface of the driving outer tube (603); the first hinge support (604) is connected to one end of a rotating rod (607); the other end of the rotating rod (607) is connected to a second hinge support (608); and the second hinge support (608) is mounted on a third rotating shaft (611).

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