Hydraulic releasing type well completion pipe string feeding tool

Abstract

The utility model relates to the technical field of oil field well completion and well repair processes, and discloses a hydraulic releasing type well completion pipe string feeding tool which comprises a left-in pipe string and a service pipe string, and the left-in pipe string is composed of a torque sleeve and a lower connector. By means of the hydraulic releasing mechanism, smooth tripping-in of the tubular column under the complex well condition is achieved, and the operation efficiency and the success rate are improved. And a sawtooth-shaped structure is designed, so that effective transmission of torque is ensured, a tubular column can be rotationally tripped in, and the tripping-in difficulty caused by borehole friction resistance is reduced. And through the ball-throwing pressure-building releasing function, quick response can be achieved when obstacles are encountered, and it is ensured that the pipe column can reach the preset depth. And due to the design of the impact ring and the shear pin, the releasing operation is quicker and more reliable, the operation time is shortened, and the safety is improved. And after the tool is released, the pressure can be continuously increased to shear the ball seat, and a circulating channel is re-established, so that the continuity and integrity of operation are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of oilfield well completion and well repair technology, in particular to a hydraulic release type completion pipe string running tool. Background Art

[0002] As my country's oil and gas exploration and development continues to expand into deeper and more unconventional areas, the number of extended-reach and horizontal wells is increasing, and well depths are continuously climbing. Given the uniquely high inclination and long, stable inclination sections of extended-reach wells, the running depth, horizontal displacement, and wellbore inclination of the completion string have all increased significantly, significantly impacting its running capacity due to wellbore friction. Furthermore, completion string obstruction, caused by debris accumulation and wellbore collapse in openhole wells, is becoming increasingly common. The ability of the string to successfully reach the planned well depth has become a key indicator of the success of openhole horizontal well completions.

[0003] In current construction practices, running perforated tubing into openhole horizontal wells to support the wellbore and maintain the integrity of the production channel has become a common practice and a standard well completion technique. When the perforated tubing encounters obstacles during lowering, strategies such as cyclic flushing or forward rotation are often used to ensure smooth lowering. However, current perforated tubing delivery operations generally rely on hanging packers. This is not only costly, but also complex, with numerous moving mechanisms and components. Faced with complex and changing well conditions, problems can easily arise during operation, leading to tubing delivery failures.

[0004] Therefore, based on the above technical problems, it is necessary for technicians in this field to develop a hydraulic drop-type completion string running tool. Utility Model Content

[0005] The utility model aims to provide a hydraulic release type completion string running tool to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A technical solution for a hydraulic release-type completion tubing delivery tool, comprising a well retention tubing and a service tubing, wherein the well retention tubing consists of a torque sleeve and a lower joint, the upper end of the torque sleeve is designed with a serrated groove, the torque sleeve and the lower joint are threadedly connected, the lower end of the lower joint is processed with a thread, which can be threadedly connected to the delivered tubing, facilitating on-site tubing delivery operations, the service tubing consists of an upper joint, a stop sleeve, a release piston, a release inner center tube, an impact ring, a stop ring, a straightening block, a spare ball seat, a connecting tube, a small ball seat, a ball baffle, a connecting sleeve, a flexible joint, a back ring, a shear pin 1, a steel ball 1, a steel ball 2, and a shear pin 2, the upper joint is provided with a serrated groove and engages with the serrated groove on the torque sleeve to transmit torque, thereby realizing the rotational running of the tubing.

[0008] As a preferred technical solution, the interior of the upper joint passes through the inner center tube of the release hand, and the stop sleeve is threadedly connected to the upper joint to prevent the inner center tube of the release hand from axial movement. The release piston is placed at the internal sealing position of the upper joint. The impact ring is sleeved on the release piston and is located under the elastic claw at the right end of the upper joint to support the elastic claw of the upper joint. A shear pin 1 is installed on the right end of the release piston and is placed in the ring groove of the inner center tube of the release hand. The stop ring is installed on the right end of the release piston through a threaded connection to play a limiting role. The straightening block is threadedly connected to the inner center tube of the release hand to play a limiting and supporting role. The spare ball seat is threadedly connected to the lower end of the inner center tube of the release hand. A ball seat surface is machined inside the spare ball seat to facilitate the pressure of the spare steel ball column. The small ball seat is installed inside the spare ball seat and fixed by a shear pin 2. The lower part of the spare ball seat is connected to the connecting tube, the ball baffle plate, the connecting sleeve, the active joint, and the back ring in sequence.

[0009] As a preferred technical solution, the interior of the service string is pressure-sealed by an O-ring.

[0010] As a preferred technical solution, the elastic claw at the right end of the upper joint cooperates with the wellbore tubing through the internal step of the torque sleeve to bear the deadweight of the tubing being sent into the well.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] The present invention is a hydraulic release-type completion tubing delivery tool. Through the hydraulic release mechanism, the tubing can be smoothly lowered into complex well conditions, thereby improving operational efficiency and success rate. The zigzag structure is designed to ensure effective torque transmission, allowing the tubing to be rotated and lowered, reducing the difficulty of lowering due to wellbore friction. The ball-throwing, pressure-holding release function allows for a quick response when encountering obstacles, ensuring that the tubing can reach the predetermined depth. The design of the impact ring and shear pin makes the release operation faster and more reliable, reducing operational time and improving safety. After the tool is released, the shear ball seat can continue to be pressurized to re-establish the circulation channel, ensuring the continuity and integrity of the operation. The design of the flexible joint makes wellhead flushing connection more convenient and improves operational flexibility. The tool has a simple and reliable structure, can withstand large loads, and the service tubing section is reusable, effectively reducing operational costs. The present invention can effectively solve the problem of tubing delivery in extended reach wells and horizontal wells, improve operational efficiency and success rate, and has significant economic benefits and application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the utility model

[0014] Figure 2 This is a schematic diagram of the hydraulic release of the utility model

[0015] Figure 3 This is a schematic diagram of the shearing of the small ball seat of the utility model

[0016] Figure 4 This is a schematic diagram of torque transmission of the utility model

[0017] Figure 5 This is a schematic diagram of the elastic claw of the upper joint of the utility model.

[0018] In the accompanying drawings: 1. Upper joint; 2. Stop sleeve; 3. Torque sleeve; 4. Release piston; 5. Release inner center tube; 6. Impact ring; 7. Stop ring; 8. Lower joint; 9. Straightening block; 10. Spare ball seat; 101. Shear pin one; 102. Steel ball one; 103. Steel ball two; 104. Shear pin two; 11. Connecting tube; 12. Small ball seat; 13. Ball stop plate; 14. Connecting sleeve; 15. Active joint; 16. Back ring. DETAILED DESCRIPTION

[0019] 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 more clearly understood, 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 some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.

[0020] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, the present invention provides a hydraulic, hands-free completion string delivery tool. It comprises two main components: a retention string and a service string. The retention string consists of a torque sleeve 3 and a lower connector 8. The torque sleeve 3 has a serrated groove on its upper end, which is threadedly connected to the lower connector 8. The lower connector 8 has a threaded lower end that can be threadedly connected to the delivered string, facilitating on-site string delivery operations.

[0021] The service string consists of an upper joint 1, a stop sleeve 2, a release piston 4, a release inner center tube 5, an impact ring 6, a stop ring 7, a straightening block 9, a spare ball seat 10, a connecting tube 11, a small ball seat 12, a ball baffle 13, a connecting sleeve 14, a movable joint 15, a back ring 16, a shear pin 101, a steel ball 102, a steel ball 2 103, and a shear pin 2 104. The interior of the service string is pressure-sealed by an O-ring.

[0022] The upper connector 1 is provided with a serrated groove that engages with the serrated groove on the torque sleeve 3 to transmit torque, enabling the tubing string to be lowered into position. The interior of the upper connector 1 passes through the inner center tube 5 of the release handle. The retaining sleeve 2 is threadedly connected to the upper connector 1 to prevent axial movement of the inner center tube 5 of the release handle. The release piston 4 is placed in a sealed area within the upper connector 1. The impact ring 6 is mounted on the release piston 4 and located below the elastic claw on the right end of the upper connector 1, providing support for the elastic claw. A shear pin 101 is installed on the right end of the release piston 4 and is positioned in the annular groove of the inner center tube 5 of the release handle. The retaining ring 7 is threadedly mounted on the right end of the release piston 4 to provide a position limit. The straightening block 9 is threadedly connected to the inner center tube 5 of the release handle, providing both position limit and support. The backup ball seat 10 is threadedly connected to the lower end of the inner center tube 5 of the release handle. The backup ball seat 10 has a ball seat surface machined inside to facilitate the placement of the backup steel ball to maintain string pressure. The small ball seat 12 is installed inside the backup ball seat 10 and secured by a shear pin 104. The lower part of the spare ball seat 10 is connected to the connecting tube 11, the ball baffle 13, the connecting sleeve 14, the movable joint 15, and the back ring 16 in sequence.

[0023] like Figure 2 As shown, the tool utilizes a hydraulic release mechanism to enable smooth running of the tubing string in complex well conditions. When an obstacle is encountered, the ball is released to build up pressure, shear pins 101 and 104 are sheared, and the release piston 4 is activated, enabling the release function and ensuring that the tubing string reaches the desired depth.

[0024] like Figure 3 As shown, the design of the impact ring 6 and shear pin 101 makes the release operation faster and more reliable, reducing operation time and improving safety. After the tool is released, the shear ball seat can be continuously pressurized to re-establish the circulation channel, ensuring the continuity and integrity of the operation.

[0025] like Figure 4 As shown, the zigzag structure is designed to ensure the effective transmission of torque, so that the pipe string can be rotated and lowered, reducing the difficulty of lowering due to wellbore friction.

[0026] like Figure 5 As shown, the elastic claw at the right end of the upper joint 1 cooperates with the wellbore string 3 through the internal step of the torque sleeve 3 to bear the deadweight of the running string.

[0027] According to the above solution, in this embodiment, the threaded end of the lower sub 8 is threadedly connected to the pipe string to be delivered. Then, the torque sleeve 3 is threadedly connected to the lower sub 8, ensuring that the serrated grooves on the torque sleeve 3 engage with the corresponding structure of the lower sub 8 to transmit torque. Next, the upper sub 1 of the service pipe string is threadedly connected to the torque sleeve 3 through the stopper sleeve 2, ensuring that the inner center pipe 5 of the dropper is fixed inside the upper sub 1 to prevent axial movement.

[0028] After connection is complete, the entire tool is lowered into the well. Under normal circumstances, the hydraulic system controls the release piston 4, ensuring smooth lowering of the tubing string. If an obstacle is encountered, the ball is dropped to hold the pressure, shear pins 101 and 104 are sheared, and the release piston 4 is activated, enabling the release function and ensuring that the tubing string reaches the desired depth.

[0029] After the release operation is completed, the shear ball seat is continuously pressurized to re-establish the circulation channel, ensuring the continuity and integrity of the operation. The design of the impact ring 6 and shear pin 101 ensures the rapidity and reliability of the release operation, reducing operation time and improving safety.

[0030] Throughout the operation, the zigzag design ensures effective torque transmission, enabling the tubing to be rotated and lowered, reducing the difficulty of lowering due to wellbore friction. The elastic claw on the right end of the upper sub (1) engages the wellbore tubing (3) via a stepped portion within the torque sleeve (3), supporting the weight of the running tubing and ensuring the stability and reliability of the entire tool.

[0031] Through the above operations, the hydraulic drop-type completion string running tool of the utility model can effectively solve the problem of string running in extended reach wells and horizontal wells, improve operation efficiency and success rate, and has significant economic benefits and application prospects.

[0032] In summary, this solution effectively solves the problem of running the tubing under complex well conditions through the hydraulic release mechanism and zigzag structure design, improves operational efficiency and success rate, and has significant economic benefits and application prospects.

[0033] The working principle and use process of the present invention are as follows: After assembling the various components of the present invention in sequence, all the working steps can be completed by working in accordance with the above implementation methods in sequence according to actual needs.

[0034] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "two ends", etc., indicating the orientation or position relationship, are based on the orientation or position relationship 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 cannot be understood as a limitation on the present invention.

[0036] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; 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.

[0037] While the embodiments described above are based on the present invention, these embodiments do not exhaustively describe all details, nor do they limit the present invention to specific embodiments. Clearly, many modifications and variations are possible 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, thereby enabling those skilled in the art to better utilize the present invention and its modifications and uses. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A hydraulic drop-type completion string running tool, characterized in that: The invention comprises two parts: a well-retaining pipe string and a service pipe string, wherein the well-retaining pipe string is composed of a torque sleeve (3) and a lower joint (8), the upper end of the torque sleeve (3) is designed with a zigzag groove, the torque sleeve (3) and the lower joint (8) are connected by threads, the lower end of the lower joint (8) is processed with threads, and can be threadedly connected with the pipe string to be sent in, so as to facilitate the on-site pipe string sending operation, the service pipe string is composed of an upper joint (1), a stop sleeve (2), a release piston (4), a release inner center pipe (5), an impact ring (6), a retaining ring (7), a straightening block (9), a spare ball seat (10), a connecting tube (11), a small ball seat (12), a ball retaining plate (13), a connecting sleeve (14), a movable joint (15), a back ring (16), a shear pin one (101), a steel ball one (102), a steel ball two (103), and a shear pin two (104), wherein the upper joint (1) is provided with a serrated groove and engages with the serrated groove on the torque sleeve (3) to transmit torque, thereby realizing the rotation and lowering of the pipe string.

2. The hydraulic release completion string running tool according to claim 1, characterized in that: The interior of the upper joint (1) passes through the inner center tube (5) of the release hand, and the stop sleeve (2) is threadedly connected to the upper joint (1) to prevent the inner center tube (5) of the release hand from axial movement. The release piston (4) is placed at the inner sealing position of the upper joint (1). The impact ring (6) is sleeved on the release piston (4) and is located under the elastic claw at the right end of the upper joint (1), supporting the elastic claw of the upper joint (1). A shear pin (101) is installed at the right end of the release piston (4) and is placed in the ring groove of the inner center tube (5). The stop ring (7) is installed on the release piston (4) through a threaded connection. 4) right end, plays a limiting role, the straightening block (9) is threadedly connected to the central tube (5) inside the throwing hand, plays a limiting and supporting role, the spare ball seat (10) is threadedly connected to the lower end of the central tube (5) inside the throwing hand, the spare ball seat (10) is processed with a ball seat surface inside, which is convenient for throwing the spare steel ball column to hold the pressure, the small ball seat (12) is installed inside the spare ball seat (10) and is fixed by the shear pin (104), the lower part of the spare ball seat (10) is connected to the connecting tube (11), the ball baffle (13), the connecting sleeve (14), the movable joint (15), and the back ring (16) in sequence.

3. The hydraulic release completion string running tool according to claim 2, characterized in that: The interior of the service string is pressure-sealed by an O-ring.

4. The hydraulic release completion string running tool according to claim 3, characterized in that: The elastic claw at the right end of the upper joint (1) cooperates with the wellbore pipe string via the internal step of the torque sleeve (3) to bear the deadweight of the pipe string.

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