Connecting tool giving consideration to lifting deblocking and pitching deblocking

Abstract

The utility model relates to the technical field of oil pipe joints for petroleum, and discloses a connecting tool giving consideration to lifting deblocking and pitching deblocking, which comprises an upper joint, a middle joint, a ball seat, a lower joint, shear pins and a sealing element, and the upper joint, the middle joint, the ball seat and the lower joint are connected through the shear pins. The upper connector, the middle connector, the ball seat and the lower connector are designed to be in concave-convex fit, the function of mutually transmitting torque can be achieved through the concave-convex fit, and a ball is arranged in the ball seat. The problem that in well completion operation, the risk of encountering resistance when a tubular column is put in and taken out can be effectively solved, and the problem that the tubular column cannot be completely recycled when lifted and put down is avoided. By designing the concave-convex matched joint, the effective transmission of torque can be ensured, so that the operation efficiency is improved, and the operation cost is reduced. In addition, the ball seat is matched with the shaft hole of the middle connector, the middle connector is matched with the supporting claw of the lower connector, the lower connector and tools below the lower connector can be hung on the middle connector, and operation convenience is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil pipe joints for petroleum, in particular to a connection tool that combines lifting and unsealing with ball throwing. Background Art

[0002] During the completion operation, there is a risk of encountering resistance when lowering and lowering the pipe string, which may result in the pipe string being unable to be completely recovered during lifting and lowering. In addition, long-term downhole operations make it easy for formation sand to penetrate between the oil pipe and the casing, causing the pipe string to be buried in sand, which in turn causes the pipe string to be stuck when it is removed.

[0003] Given that current tubing connection tools generally use a tubing thread connection mechanism, this design requires rotating the tubing to transmit torque to the connection tool when removing the tubing, in order to unlock the threads and separate the upper tubing. However, faced with the challenge of long tubing, it is difficult to ensure that the torque generated by the rotation can be fully transmitted to the connection tool. At the same time, the method of relying on rotating the tubing to unlock the threads is time-consuming, which invisibly increases the operating cost.

[0004] Therefore, based on the above technical problems, it is necessary for technicians in this field to develop a connection tool that takes into account both lifting to release the seal and throwing the ball to release the seal. Utility Model Content

[0005] The utility model aims to provide a connection tool which can be lifted up to release the seal and thrown into the ball to release the seal, so as to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A technical solution for a connection tool that takes into account both lifting to release and throwing to release, includes an upper joint, a middle joint, a ball seat, a lower joint, a shear pin and a sealing element. The upper joint, the middle joint, the ball seat and the lower joint are all connected by shear pins. The upper joint, the middle joint, the ball seat and the lower joint are designed with a concave-convex fit, and the function of transmitting torque to each other can be achieved through the concave-convex fit. A ball is arranged in the ball seat.

[0008] As a preferred technical solution, the ball seat and the middle joint are matched with an axial hole, and the middle joint and the lower joint are matched with claws. The middle joint claws can suspend the lower joint and the tools below it under the support of the ball seat.

[0009] As a preferred technical solution, the sealing element adopts a small outer diameter design to reduce the axial load generated by the internal pressure during the use of the tool. The sealing element consists of sealing component one, sealing component two, sealing component three, sealing component four, sealing component five and sealing component six.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0011] The present utility model is a connection tool that combines upward lifting and releasing with ball dropping and releasing, which can effectively solve the risk of pipe string getting stuck during the running-in and retrieval in well completion operations, and avoid the problem that the pipe string cannot be completely recovered during the up-and-down lifting. By designing the joints with concave-convex fit, the effective transmission of torque can be ensured, thereby improving the operation efficiency and reducing the operation cost. In addition, the shaft hole fit between the ball seat and the middle joint and the pawl fit between the middle joint and the lower joint enable the middle joint to suspend the lower joint and the tools below it, further improving the operation convenience. The small outer diameter design of the sealing element reduces the axial load generated by the internal pressure during the use of the tool, ensures the sealing performance, and thus improves the overall operation safety and reliability. Description of the Drawings

[0012] Figure 1 It is a schematic diagram of the overall structure of a connection tool that combines upward lifting and releasing with ball dropping and releasing;

[0013] Figure 2 It is a schematic diagram of the joint structure of a connection tool that combines upward lifting and releasing with ball dropping and releasing;

[0014] Figure 3 It is a schematic diagram of the fit structure of a connection tool that combines upward lifting and releasing with ball dropping and releasing.

[0015] In the reference numerals: 1, upper joint; 2, middle joint; 3, shear pin; 4, ball seat; 5, lower joint; 6, sealing component one; 7, sealing component two; 8, sealing component three; 9, sealing component four; 10, sealing component five; 11, sealing component six; 12, ball. Detailed Embodiments

[0016] The features and exemplary embodiments of various aspects of the present utility model will be described in detail below. In order to make the purpose, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. For those skilled in the art, the present utility model can be implemented without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present utility model by showing examples of the present utility model.

[0017] Such as Figure 1 、 Figure 2 and Figure 3As shown in the figure, the utility model provides a connection tool technical solution that combines up-lift release and ball-release: It includes an upper sub 1, a middle sub 2, a ball seat 4, a lower sub 5, shear pins 3, and sealing elements (including sealing assembly one 6, sealing assembly two 7, sealing assembly three 8, sealing assembly four 9, sealing assembly five 10, and sealing assembly six 11). The upper sub 1, the middle sub 2, the ball seat 4, and the lower sub 5 are connected by shear pins 3, ensuring the reliability of the connection. The upper sub 1, the middle sub 2, the ball seat 4, and the lower sub 5 are designed with concave-convex fits, and the function of transmitting torque to each other can be achieved through the concave-convex fits. A ball 12 is arranged inside the ball seat 4.

[0018] Among them, the ball seat 4 and the middle sub 2 adopt a shaft-hole fit, and a claw support fit is adopted between the middle sub 2 and the lower sub 5. This design allows the middle sub 2 to hang the lower sub 5 and the tools below it under the support of the ball seat 4, so that operations can be conveniently carried out when needed.

[0019] Among them, the sealing elements adopt a small outer diameter design to reduce the axial load generated by the internal pressure during the use of the tool. The sealing elements are composed of multiple sealing assemblies (6 - 11), and these assemblies cooperate with each other to ensure the sealing performance of the connection tool during downhole operations.

[0020] During the use process, when up-lift release is required, by lifting the upper sub 1, the shear pins 3 will be sheared and broken, thereby realizing the separation of the upper sub 1 and the middle sub 2. At the same time, due to the shaft-hole fit between the ball seat 4 and the middle sub 2, and the claw support fit between the middle sub 2 and the lower sub 5, the middle sub 2 can maintain a hanging state, facilitating subsequent operations.

[0021] When ball-release is required, by putting a ball 12 with a specific size into the ball seat 4, the ball 12 will block the channel of the ball seat 4, thereby realizing the release. The size of the ball 12 is designed to match the inner diameter of the ball seat 4, ensuring the reliability of the ball-release.

[0022] In summary, the connection tool of the utility model combines the two methods of up-lift release and ball-release, improving the flexibility and efficiency of the operation. At the same time, through the optimized joint structure and sealing element design, the reliability and safety of the tool during downhole operations are ensured.

[0023] The working principle and usage process of the utility model: After assembling the components of this solution in sequence, work according to the above-mentioned implementation methods in sequence according to actual needs, and that is all the working steps.

[0024] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present utility model.

[0025] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "center", "both ends", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0026] In the present utility model, unless otherwise clearly specified and limited, the terms "installed", "set", "connected", "fixed", "swiveling connection", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two elements or the interaction relationship between two elements. Unless otherwise clearly limited, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] According to the embodiments of the present utility model as described above, these embodiments do not describe all the details in detail, nor do they limit the present utility model to only the specific embodiments. Obviously, according to the above description, many modifications and changes can be made. This specification selects and specifically describes these embodiments to better explain the principle and practical application of the present utility model, so that those skilled in the art can make good use of the present utility model and its modified use based on the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A connection tool that can be used for both lifting and throwing, characterized in that: It consists of an upper sub (1), a middle sub (2), a ball seat (4), a lower sub (5), shear pins (3) and a sealing element. The upper sub (1), the middle sub (2), the ball seat (4) and the lower sub (5) are all connected by shear pins (3). The upper sub (1), the middle sub (2), the ball seat (4) and the lower sub (5) are designed with concave-convex fits, and the function of transmitting torque to each other can be realized through the concave-convex fits. A ball (12) is arranged in the ball seat (4).

2. The connection tool that takes into account both lifting and unsealing and ball-throwing unsealing according to claim 1, wherein: The ball seat (4) and the middle sub (2) adopt a shaft-hole fit, and a claw fit is adopted between the middle sub (2) and the lower sub (5). The claws of the middle sub can hang the lower sub (5) and the tools below it under the support of the ball seat (4).

3. A connection tool that can be used for both lifting and throwing according to claim 1, characterized in that: The sealing element adopts a small outer diameter design, which reduces the axial load generated by the internal pressure during the use of the tool. The sealing element consists of a first sealing component (6), a second sealing component (7), a third sealing component (8), a fourth sealing component (9), a fifth sealing component (10) and a sixth sealing component (11).

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