Underground gravitational potential energy conversion type back-off device
Through the downhole gravity potential energy conversion inverter, the gravity of the drilling tool is converted into rotational torque force, solving the problems of low torque transmission loss and control accuracy in the prior art, achieving efficient and safe inverting operations, reducing costs and risks.
Patent Information
- Application Number
- CN202510054525.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-14
- Publication Date
- 2025-04-11
AI Technical Summary
The existing underground salvage and card removal technology relies on ground equipment to provide torque, resulting in serious losses during torque transmission, low control accuracy, and easy to cause inverted drill rod expansion and buckle and jamming.
The downhole gravity potential energy conversion inverter is used to convert the gravity of the drill tool into rotational torque force through the torque converter to achieve inverted operation. The device includes a torque converter and an inverter joint that is connected by balls to reduce friction and amplify torque using a planetary gear design.
There is no need for ground equipment to provide torque, reduce torque loss, improve the efficiency and success rate of reversed operations, reduce operating costs, enhance the durability and reliability of equipment, and avoid the phenomenon of inverted drill rod expansion and jamming.
Smart Images
Figure CN119801424A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of unblocking and undercutting in oil and gas well salvage pipe column construction, in particular to an underground gravity potential energy conversion type undercutting device. Background Art
[0002] In the process of oil and gas production, due to complex geological conditions, changes in drilling fluid properties, improper operation and other factors, the downhole drilling tools may get stuck, that is, the drilling tools are stuck in the well and cannot move normally. Once the drill bit is stuck, it will not only affect the normal production of the oil and gas wells, but also cause huge economic losses. Therefore, how to effectively carry out downhole salvage operations and resolve the drill bit stuck accident is a technical problem that needs to be solved urgently in the construction of oil and gas wells.
[0003] In the existing underground fishing and unstuck technology, the reverse operation is one of the common methods. The reverse operation refers to the connection and separation of the drill tool by rotating the drill tool and using the forward and reverse rotation of the connecting threads between the drill pipes. During the reverse operation, ground equipment (such as a drilling rig) is usually required to provide torque, which is transmitted to the underground stuck point through the drill pipe to achieve reverse operation. However, this traditional reverse operation technology has many problems.
[0004] First, due to the complex downhole environment, the torque will be affected by factors such as friction and well wall resistance during transmission, resulting in torque loss, thus affecting the undercut effect. Secondly, the torque provided by the ground equipment is often difficult to control accurately, which can easily cause the undercut drill pipe to expand, that is, the threaded connection undergoes plastic deformation due to excessive torque, resulting in the drill pipe being unable to connect or separate normally. In addition, excessive torque may also cause jamming, that is, the drill bit at the stuck point downhole cannot rotate due to excessive torque, and may even cause the drill bit to break, causing more serious downhole accidents.
[0005] In order to solve the above problems, it is proposed to use hydraulic or pneumatic systems to provide torque to reduce the loss in the torque transmission process and improve the torque control accuracy. However, these solutions often require complex ground equipment support, which increases the operating cost. In addition, the reliability of hydraulic or pneumatic systems is also challenged in the high temperature and high pressure environment underground.
[0006] Therefore, there is an urgent need for a new type of downhole salvage pipe construction unstuck and reverse threading technology, which can effectively solve the downhole drill sticking problem without relying on ground equipment to provide torque, and improve the safety and success rate of reverse threading operations.
[0007] Therefore, based on the above technical problems, it is necessary for technicians in this field to develop an underground gravity potential energy conversion type invertor. Summary of the invention
[0008] The purpose of the present invention is to provide a downhole gravity potential energy conversion type buckle to solve the problems raised in the above background technology.
[0009] To achieve the above object, the present invention provides the following technical solutions:
[0010] A downhole gravity potential energy conversion type undercut technical solution, comprising a torque converter and an undercut joint, wherein the torque converter and the undercut joint are connected via a ball;
[0011] A gear seat is provided in the undercut joint, a planetary gear 1 and a planetary gear 2 are installed in the gear seat, a gear cap is commonly connected to the tail ends of the planetary gear 1 and the planetary gear 2, and a driving gear is provided on the adjacent side of the gear cap;
[0012] A ratchet shaft is arranged inside the torque converter, a ratchet is sleeved outside the ratchet shaft, a spare cap is arranged on the adjacent side of the ratchet, and a torque screw is arranged inside the spare cap.
[0013] As a preferred technical solution, the torque screw utilizes the gravity of the drill tool to act on the torque converter, and through the action of the screw pitch, the gravity of the drill tool is converted into a rotational torque force. The torque converter and the torque screw cooperate with each other, and this rotational torque force acts on the downhole salvage pipe through the inverted male cone and the inverted salvage tube to reverse the pipe column connection thread and lift it out of the wellbore.
[0014] As a preferred technical solution, the spare cap is used to prevent the torque screw from coming out of the socket.
[0015] As a preferred technical solution, the ratchet shaft is used to transmit the torque of the torque converter to the ratchet, and the ratchet is engaged with the driving gear and transmits the torque to the driving gear.
[0016] As a preferred technical solution, the driving gear is meshed with the gear cap, the planetary gear one, and the planetary gear two.
[0017] As a preferred technical solution, the inverted joint is used to drive the salvage male cone or the inverted salvage spear to complete the inverted salvage.
[0018] As a preferred technical solution, a plurality of groups of balls are provided between the inverted joint and the torque converter and are evenly distributed in a circular shape, which can reduce friction.
[0019] As a preferred technical solution, the configuration of the planetary gear 1 and the planetary gear 2 enables torque amplification during the transmission process.
[0020] As a preferred technical solution, the connection between the torque converter and the undercut joint is through a ball rotation connection, which ensures that the undercut joint can maintain good working performance under complex working conditions underground.
[0021] Compared with the prior art, the present invention has the following beneficial effects:
[0022] The present invention is a downhole gravity potential energy conversion type undercut device, which utilizes the gravity potential energy of the downhole drilling tool itself and converts the gravity potential energy into a rotational torque force through a torque converter, thereby realizing an undercut operation. This design avoids the limitation of relying on ground equipment to provide torque in traditional undercut technology, reduces the loss of torque in the transmission process, and improves the efficiency and success rate of undercut operations.
[0023] Since the torque converter and the undercut joint are connected by ball bearings, this structural design significantly reduces friction, allowing the undercut joint to maintain good working performance under complex underground working conditions. At the same time, the ball bearing connection method also improves the durability and reliability of the undercut joint, reducing maintenance costs and operation time.
[0024] The planetary gear design in the present invention enables torque amplification during the transmission process, which not only enhances the strength of the undercut operation, but also improves the torque control accuracy. By accurately controlling the torque, the occurrence of undercut drill pipe expansion and jamming can be effectively avoided, thereby protecting the downhole equipment and reducing the losses caused by improper operation.
[0025] The inverted joint of the present invention is designed to drive a salvage male cone or an inverted salvage spear to complete inverting. This structure is simple and easy to operate. It can quickly respond to underground drill sticking accidents and perform inverted operations in a timely manner, thereby shortening the operation time and improving the production efficiency of oil and gas wells.
[0026] The undercut device of the present invention does not require complex ground equipment support, which reduces the operating cost, and at the same time, its reliability is guaranteed in the high temperature and high pressure environment of the well. This enables the present invention to work stably in various harsh well environments, providing strong technical support for the safe production of oil and gas wells.
[0027] In summary, the present invention has significant technical innovation and practicality, can effectively solve the problem of drill sticking in the well, improve the safety and success rate of the reverse operation, and has good economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 The figure is a schematic diagram of the overall structure of an underground gravity potential energy conversion type invertor.
[0029] In the accompanying drawings: 1, undercut joint; 2, gear seat; 3, planetary gear one; 4, planetary gear two; 5, gear cap; 6, driving gear; 7, ball; 8, ratchet; 9, ratchet shaft; 10, spare cap; 11, torque screw; 12, torque converter. DETAILED DESCRIPTION
[0030] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. For those skilled in the art, the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is only intended to provide a better understanding of the present invention by illustrating examples of the present invention.
[0031] like Figure 1 As shown, the present invention provides a downhole gravity potential energy conversion type undercut technical solution: including a torque converter 12 and an undercut joint 1 structure, wherein the torque converter 12 and the undercut joint 1 are connected by a series of balls 7. These balls 7 are arranged in a plurality and are distributed at equal intervals in a circular shape. Such a design is intended to reduce friction and ensure the flexibility of the connection part, thereby maintaining efficient performance during operation.
[0032] Inside the undercut joint 1, a gear seat 2 is provided, in which a planetary gear 1 3 and a planetary gear 2 4 are installed. The tail ends of the two planetary gears 3 and 4 are connected to a gear cap 5, and a driving gear 6 is provided on the adjacent side of the gear cap 5. This structural design enables the gears to effectively transmit and distribute torque.
[0033] The torque converter 12 is provided with a ratchet shaft 9 inside, and a ratchet 8 is sleeved on the outside of the ratchet shaft 9. A spare cap 10 is provided on the adjacent side of the ratchet 8, and a torque screw 11 is provided inside the spare cap 10. This structural design ensures accurate transmission and control of torque.
[0034] The torque screw 11 uses the gravity of the drill tool to act on the torque converter 12, and through the action of the screw pitch, the gravity of the drill tool is converted into a rotational torque force. The torque converter 12 cooperates with the torque screw 11, and this rotational torque force acts on the downhole salvage pipe string through the inverted male cone and the inverted salvage tube, so that the pipe string connection thread is reversed and lifted out of the wellbore. This process reflects the high efficiency and practicality of the present invention in downhole operations.
[0035] The purpose of designing the spare cap 10 is to prevent the torque screw 11 from coming out during operation, thereby ensuring the stability and safety of the entire system.
[0036] The function of the ratchet shaft 9 is to transmit the torque of the torque converter 12 to the ratchet 8, and the ratchet 8 meshes with the driving gear 6 to effectively transmit the torque to the driving gear 6, thereby ensuring the continuity and efficiency of the torque transmission.
[0037] The driving gear 6 meshes with the gear cap 5, the planetary gear 1 3, and the planetary gear 2 4 to achieve the transmission and amplification of the torque. This meshing relationship ensures the amplification effect of the torque during the transmission process, thereby improving the working efficiency.
[0038] The purpose of designing the undercut joint 1 is to drive the salvage male cone or the undercut spear to complete the undercut operation. This function reflects the application value and practicality of the present invention in underground operations.
[0039] The connection between the torque converter 12 and the undercut joint 1 is a rotational connection through the ball 7. This design ensures that the undercut can maintain good working performance under complex underground working conditions. This connection method not only improves the durability of the equipment, but also ensures reliability during the operation process.
[0040] The downhole gravity potential energy conversion type reverse cutter of the present invention can effectively utilize the gravity potential energy of the downhole drill tool itself, and convert the gravity potential energy into rotational torque through a torque converter, thereby realizing reverse cut operation. This design avoids the limitation of relying on ground equipment to provide torque in traditional reverse cut technology, reduces the loss of torque in the transmission process, and improves the efficiency and success rate of reverse cut operation. At the same time, the reverse cutter has a simple structure and is easy to operate. It can quickly respond to downhole drill bit jams, perform reverse cut operations in a timely manner, shorten operation time, and improve the production efficiency of oil and gas wells.
[0041] According to the above scheme, in this embodiment, first, the buckle is lowered into the well to a predetermined position, that is, above the stuck point. At this time, the buckle joint 1 of the buckle is connected to the stuck pipe string in the well.
[0042] Next, the drilling tool is slowly lowered by ground equipment, so that the weight of the drilling tool acts on the torque converter 12. Due to the cooperation between the torque converter 12 and the torque screw 11, the weight of the drilling tool is converted into a rotational torque force.
[0043] Then, the rotational torque force acts on the downhole fishing pipe through the inverted male cone or the inverted fishing tube, causing the connecting threads of the pipe to rotate relatively, thereby realizing the inverted operation.
[0044] During the undercutting process, due to the setting of the planetary gear 1 3 and the planetary gear 2 4, the torque can be amplified during the transmission process, which enhances the strength of the undercutting operation and improves the control accuracy of the torque.
[0045] After the undercut operation is completed, the undercut device can be recovered to the ground for the next operation. The whole process does not require complex ground equipment support, which greatly reduces the operation cost and improves the operation efficiency.
[0046] Through the above steps, the underground gravity potential energy conversion type backhoe of the present invention can effectively solve the problem of underground drill sticking, improve the safety and success rate of backhoe operation, and has good economic and social benefits.
[0047] The working principle and use process of the present invention: After assembling the various components of the present solution in sequence, all the working steps can be completed by working in accordance with the above implementation methods in sequence according to actual needs.
[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.
[0049] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0050] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.
[0051] According to the embodiments of the present invention as described above, these embodiments do not describe all the details in detail, nor do they limit the invention to specific embodiments. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can make good use of the present invention and the modified use based on the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A downhole gravity potential energy conversion type buckle, characterized in that: It comprises a torque converter (12) and an undercut joint (1), wherein the torque converter (12) and the undercut joint (1) are connected via a ball (7); A gear seat (2) is arranged in the undercut joint (1), a planetary gear 1 (3) and a planetary gear 2 (4) are installed in the gear seat (2), the tail ends of the planetary gear 1 (3) and the planetary gear 2 (4) are connected to a gear cap (5), and a driving gear (6) is arranged on the adjacent side of the gear cap (5); A ratchet shaft (9) is arranged inside the torque converter (12), a ratchet (8) is sleeved outside the ratchet shaft (9), a spare cap (10) is arranged on the adjacent side of the ratchet (8), and a torque screw (11) is arranged inside the spare cap (10).
2. The downhole gravity potential energy conversion type undercut according to claim 1, characterized in that: The torque screw (11) uses the weight of the drill to act on the torque converter (12), and converts the weight of the drill into a rotational torque force through the action of the screw pitch. The torque converter (12) cooperates with the torque screw (11).
3. The downhole gravity potential energy conversion type undercut according to claim 1, characterized in that: The spare cap (10) is used to prevent the torque screw (11) from falling out.
4. The downhole gravity potential energy conversion type undercut according to claim 1, characterized in that: The ratchet shaft (9) is used to transmit the torque of the torque converter (12) to the ratchet (8), and the ratchet (8) is engaged with the driving gear (6) and transmits the torque to the driving gear (6).
5. The underground gravity potential energy conversion type undercut according to claim 1, characterized in that: The driving gear (6) is meshed with the gear cap (5), the planetary gear one (3) and the planetary gear two (4).
6. The underground gravity potential energy conversion type undercut according to claim 1, characterized in that: The inverted joint (1) is used to drive the salvage male cone or the inverted salvage spear to complete the inverted salvage.
7. The underground gravity potential energy conversion type undercut according to claim 1, characterized in that: A plurality of groups of balls (7) are provided between the undercut joint (1) and the torque converter (12), and are distributed at equal intervals in a circumferential shape, thereby reducing friction.
8. The underground gravity potential energy conversion type undercut according to claim 1, characterized in that: The arrangement of the planetary gear 1 (3) and the planetary gear 2 (4) enables torque amplification during the torque transmission process.
9. The underground gravity potential energy conversion type undercut according to claim 1, characterized in that: The torque converter (12) and the undercut joint (1) are connected by rotational connection via a ball (7), thereby ensuring that the undercut joint can maintain good working performance under complex underground working conditions.