Integral soluble ball seat

Abstract

The utility model relates to the technical field of oil and gas exploitation tools, and discloses an integral type soluble ball seat which comprises a tail portion and a slip, the slip is installed at one end of the tail portion, the inner diameter of the slip is in a conical design, one end of an inner cavity of the slip is connected with a wedge body, a groove is formed in the tip end, close to the wedge body, of the slip, and the tail portion of the slip is connected with the wedge body. And shear pins are annularly distributed and installed on the inner bottom wall of the groove at intervals, the pin head ends of the shear pins are embedded into the wedge body, a sealing ring is installed at one end of the slip, and the sealing ring is located at the pointed end of the wedge body. The inner diameter inclined surface of the slip corresponds to the outer diameter inclined surface of the wedge body and is mutually wedged with the outer diameter inclined surface of the wedge body, the groove is formed in the slip, the plurality of groups of shear pins penetrate through the groove and are fixedly connected with the wedge body, and the connection stability of the slip and the wedge body is enhanced through the matching of the shear pins, so that the overall structural stability of the soluble ball seat is enhanced; and the device can be kept in a stable state in a complex underground environment.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas extraction tools, specifically an integral soluble ball seat. Background Technology

[0002] Integral soluble ball seats are typically made of soluble materials and are widely used in fracturing operations in oil and gas wells. As a temporary plugging tool, its design allows the ball seat to withstand high pressure during use and dissolve after fracturing, eliminating the need for additional drilling or dismantling work and improving operational efficiency.

[0003] Downhole environments are typically corrosive, requiring soluble ball seats to possess excellent corrosion resistance to prevent damage during use. Furthermore, during downhole operations, soluble ball seats are subjected to high pressure and impact forces. Existing soluble ball seats typically use a wedge-fit connection between the slips and the wedge, which can compromise the stability of this connection under high-pressure impacts.

[0004] Therefore, a new type of integral soluble ball seat is needed. By setting a reinforcement structure to improve the connection stability between the wedge and the slip, the overall structural strength of the soluble ball seat can be improved, enabling it to withstand higher pressure and impact and adapt to more complex downhole environments. Utility Model Content

[0005] To address the technical problem that existing soluble ball seats need to withstand high pressure and impact during downhole operation, and that the connection between the slips and the wedges in existing soluble ball seats is usually a wedge-fit connection, the stability of the connection will be affected under high pressure impact, this utility model provides an integral soluble ball seat.

[0006] This utility model is achieved using the following technical solution: an integral soluble ball seat, including a tail and a slip, wherein a slip is installed at one end of the tail, the inner diameter of the slip is tapered, a wedge is connected to one end of the inner cavity of the slip, a groove is provided at the tip of the slip near the wedge, shear pins are installed in a ring at intervals on the bottom wall of the groove, and the head end of the shear pin is embedded in the inside of the wedge, and a sealing ring is installed at one end of the slip, and the sealing ring is located at the tip of the wedge.

[0007] Preferably, the outer periphery of the clasp has multiple sets of through holes along its circumferential direction, and the outer periphery of the clasp has multiple sets of long grooves along its longitudinal direction.

[0008] Preferably, multiple sets of the elongated grooves are distributed in a ring around the outer periphery of the clasp, and the through holes and elongated grooves are distributed at intervals.

[0009] Preferably, multiple sets of elliptical holes are formed at both ends of the outer periphery of the card along its circumferential direction, and one end of the elliptical hole is connected to the long groove.

[0010] Preferably, a cone cap is installed at one end of the wedge, and a soluble fracturing ball is placed inside the wedge.

[0011] Preferably, the tail portion includes a release ring and a tailstock.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] The inner diameter bevel of the slip corresponds to the outer diameter bevel of the wedge, and the two wedge together. The groove and shear pins combine to form a reinforced structure. The groove is opened on the slip, and multiple sets of shear pins pass through the groove and are connected and fixed to the wedge. The connection stability between the slip and the wedge is enhanced by the cooperation of the shear pins, thereby enhancing the overall structural stability of the soluble ball seat, enabling it to maintain a stable state in complex downhole environments and withstand higher pressure and impact. Attached Figure Description

[0014] Figure 1 A three-dimensional structural diagram of the soluble ball seat provided by this utility model;

[0015] Figure 2 for Figure 1 Enlarged structural diagram at point A in the diagram;

[0016] Figure 3 This is a schematic diagram of the half-section structure of the soluble ball seat of this utility model;

[0017] Figure 4 for Figure 3 A magnified structural diagram at point B in the diagram.

[0018] In the diagram: 1. Tail end; 2. Slipper; 3. Groove; 4. Shear pin; 5. Wedge; 6. Sealing ring; 7. Cone cap; 8. Soluble fracturing ball; 9. Through hole; 10. Long groove; 11. Elliptical hole. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0020] Please see Figure 1 - Figure 4The integral soluble ball seat of this embodiment includes a tail 1 and a slip 2. The tail 1 includes a release ring and a tail seat. The tail seat on the tail 1 provides a foundation for support and connection of other components of the integral soluble ball seat, ensuring the structural stability of the integral ball seat. The breaking force of the release ring on the tail 1 is pre-designed and controlled. During the setting process of the soluble ball seat, when the pressure reaches a certain value, the release ring is broken, thereby causing the ball seat to disengage from the setting tool and completing the setting operation.

[0021] Furthermore, a slip 2 is installed at one end of the tail 1. The inner diameter of the slip 2 is tapered. A wedge 5 is connected to one end of the inner cavity of the slip 2. A groove 3 is provided at the tip of the slip 2 near the wedge 5. Shear pins 4 are installed in a ring at intervals on the bottom wall of the groove 3, and the head end of the shear pins 4 is embedded in the inside of the wedge 5.

[0022] Specifically, the inner diameter bevel of slip 2 corresponds to the outer diameter bevel of wedge 5, and the two wedge together. The groove 3 and shear pin 4 are combined to form a reinforcement structure. The groove 3 is opened on slip 2, and multiple sets of shear pins 4 pass through the groove 3 and are connected and fixed to wedge 5. The connection stability between slip 2 and wedge 5 is enhanced by the cooperation of shear pins 4, thereby enhancing the overall structural stability of the soluble ball seat, enabling it to maintain a stable state in complex downhole environments and withstand higher pressure and impact.

[0023] Furthermore, multiple sets of through holes 9 are opened through the outer periphery of the slip 2 along its annular direction, and multiple sets of long grooves 10 are opened through the outer periphery of the slip 2 along its longitudinal direction. The multiple sets of long grooves 10 are distributed annularly on the outer periphery of the slip 2, and the through holes 9 and long grooves 10 are arranged at intervals. Multiple sets of elliptical holes 11 are opened through the two ends of the outer periphery of the slip 2 along its annular direction, and one end of the elliptical hole 11 is connected to the long groove 10.

[0024] Specifically, during the setting process, the wedge 5 transmits the setting force to the slips 2, causing the slips 2 to expand under stress due to the presence of the long groove 10 and to displace along the inclined direction of the wedge 5. During the displacement, the shear pin 4 is subjected to shear force. When the shear force is too large, the shear pin 4 is sheared off, and the slips 2 continues to expand and become fixed to the wellbore wall. During the operation of the slips 2, the presence of the long groove 10, the through hole 9, and the elliptical hole 11 allows the slips 2 to better release stress and avoid damage to the slips 2 due to stress concentration.

[0025] Furthermore, a sealing ring 6 is installed at one end of the slip 2, and the sealing ring 6 is located at the tip of the wedge 5. A cone cap 7 is installed at one end of the wedge 5, and a soluble fracturing ball 8 is placed inside the wedge 5. The sealing ring 6 is a ring-shaped seal with a notch. During the setting process, it is compressed by force and has elasticity, so it presses against the outer peripheral wall of the wedge 5 to play a sealing role and prevent fluid leakage. The cone cap 7 is used to protect the sealing ring 6 and prevent the sealing ring 6 from loosening or being damaged by external factors during use.

[0026] Working principle: The tail section 1 includes a release ring and a tail seat. The tail seat provides support and connection for other components of the integral soluble ball seat. The inner diameter slope of the slip 2 corresponds to the outer diameter slope of the wedge 5, and the two wedge each other. Multiple sets of shear pins 4 pass through the groove 3 and are connected and fixed to the wedge 5. The cooperation of the shear pins 4 enhances the connection stability between the slip 2 and the wedge 5, thereby enhancing the overall structural stability of the soluble ball seat and enabling it to maintain a stable state in complex downhole environments.

[0027] During the setting process, the wedge 5 transmits the setting force to the slips 2, causing the slips 2 to expand under stress due to the presence of the long groove 10 and to move along the inclined direction of the wedge 5. During the displacement, the shear pin 4 is subjected to shear force. When the shear force is too large, the shear pin 4 is sheared off, and the slips 2 continues to expand and become fixed to the wellbore wall. During the operation of the slips 2, the presence of the long groove 10, the through hole 9 and the elliptical hole 11 can enable the slips 2 to better release stress and avoid damage to the slips 2 due to stress concentration.

[0028] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. An integral soluble ball seat, comprising a tail (1) and a slip (2), characterized in that, A slip (2) is installed at one end of the tail (1). The inner diameter of the slip (2) is tapered. A wedge (5) is connected to one end of the inner cavity of the slip (2). A groove (3) is provided at the tip of the slip (2) near the wedge (5). Shear pins (4) are installed in a ring at intervals on the bottom wall of the groove (3). The head of the shear pin (4) is embedded in the inside of the wedge (5). A sealing ring (6) is installed at one end of the slip (2). The sealing ring (6) is located at the tip of the wedge (5).

2. The integral soluble ball seat according to claim 1, characterized in that, The outer periphery of the slip (2) has multiple sets of through holes (9) extending along its circumferential direction, and the outer periphery of the slip (2) has multiple sets of long grooves (10) extending along its longitudinal direction.

3. The integral soluble ball seat according to claim 2, characterized in that, Multiple sets of the long grooves (10) are distributed in a ring around the outer periphery of the clasp (2), and the through holes (9) and the long grooves (10) are arranged at intervals.

4. The integral soluble ball seat according to claim 1, characterized in that, Multiple sets of elliptical holes (11) are opened through both ends of the outer periphery of the card (2) along its annular direction, and one end of the elliptical hole (11) is connected to the long groove (10).

5. The integral soluble ball seat according to claim 1, characterized in that, A cone cap (7) is installed at one end of the wedge (5), and a soluble fracturing ball (8) is placed inside the wedge (5).

6. The integral soluble ball seat according to claim 1, characterized in that, The tail section (1) includes a release ring and a tail seat.

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