Sliding sleeve capable of plugging water

Abstract

The utility model relates to a sliding sleeve capable of plugging water, which comprises an upper joint, an outer cylinder and a lower joint, the inner wall of the upper end of the outer cylinder is fixedly connected with the outer wall of the lower end of the upper joint, and the inner wall of the lower end of the outer cylinder is fixedly connected with the outer wall of the upper end of the lower joint; a setting ball seat is arranged in the outer cylinder in a sleeved mode, and a shear screw is arranged between the setting ball seat and the outer cylinder. The setting ball seat can be matched with the soluble ball or the ball rod assembly to block an internal channel of the setting ball seat; a plurality of through overflowing holes matched with the setting ball seat are formed in the side wall of the outer cylinder in the circumferential direction. In the construction process or in the later period of construction, water may be discharged after a lower gas layer is exploited, water drainage or water plugging operation must be performed once water is discharged from a gas well, so that the influence on the production of an upper gas layer is avoided, at the moment, a ball rod assembly matched with the sliding sleeve can be thrown from a wellhead and is locked in a setting ball seat of the sliding sleeve through pumping, and the ball rod assembly is locked in the setting ball seat. And at the moment, the sliding sleeve can block the lower air layer below, so that the production of the upper air layer is not influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas field equipment, and particularly relates to a water plugging sliding sleeve. Background Technique

[0002] Horizontal well development is an important technology to improve oilfield production, recovery rate and economic benefits. In the existing oilfield development process, it is inconvenient to carry out combined production of the horizons and connection components between packers. It is inconvenient to carry out acidizing or sand fracturing construction on gas layers, and the gas layer is prone to water production during the construction process, which affects the second gas layer and causes production impact. Content of the Utility Model

[0003] The utility model provides a water plugging sliding sleeve, which is used in cooperation with a packer and can effectively block the water production of the lower gas layer to avoid affecting the exploitation of the upper gas layer.

[0004] The technical solution adopted by the utility model is: a water plugging sliding sleeve, which is characterized in that it includes an upper joint, an outer cylinder and a lower joint arranged from top to bottom. The inner wall of the upper end of the outer cylinder is fixedly connected with the outer wall of the lower end of the upper joint, and the inner wall of the lower end of the outer cylinder is fixedly connected with the outer wall of the upper end of the lower joint; a setting ball seat is sleeved inside the outer cylinder, and a shear screw is arranged between the setting ball seat and the outer cylinder; the setting ball seat can cooperate with a soluble ball or a ball rod assembly to block the internal channel of the setting ball seat; a plurality of through flow holes in cooperation with the setting ball seat are arranged on the side wall of the outer cylinder along the circumferential direction.

[0005] Preferably, the setting ball seat includes an upper part of the ball seat, a lower part of the ball seat and a ball seat lock ring. The outer side wall of the upper part of the ball seat cooperates with the flow hole to open or block the flow hole; a shear screw is arranged between the outer side wall of the upper part of the ball seat and the outer cylinder. A ball seat lock ring for cooperating with the ball rod assembly is arranged on the inner side wall of the upper part of the ball seat, and the lower end of the upper part of the ball seat is fixedly connected with the upper end of the lower part of the ball seat.

[0006] Preferably, a through hole with a wider upper part and a narrower lower part for cooperating with the soluble ball is arranged inside the upper part of the ball seat.

[0007] Preferably, a sliding sleeve lock ring for cooperating with the lower part of the ball seat is arranged on the inner wall of the outer cylinder.

[0008] Preferably, ring teeth for cooperating with the sliding sleeve lock ring are arranged on the outer wall of the lower part of the ball seat.

[0009] Preferably, the ball rod assembly includes a ball rod upper joint, a ball rod sealing ring and a ball rod guiding head. The lower end of the ball rod upper joint is fixedly connected with the upper end of the ball rod guiding head, and a ball rod sealing ring for blocking the internal channel of the setting ball seat is arranged between the ball rod upper joint and the ball rod guiding head.

[0010] Preferably, ring teeth for cooperating with the ball seat lock ring are arranged on the outer wall of the ball rod guiding head.

[0011] Preferably, the club upper joint and the club guide are threadedly connected.

[0012] Preferably, the inner wall of the upper end of the outer cylinder is threadedly connected to the outer wall of the lower end of the upper joint.

[0013] Preferably, the inner wall of the lower end of the outer cylinder is threadedly connected to the outer wall of the upper end of the lower joint.

[0014] The beneficial effect achieved by the utility model is that during the construction process or in the later stage of construction, water may be produced after the lower gas layer is mined. Once the gas well produces water, drainage or water blocking operations must be performed to avoid affecting the production of the upper gas layer. At this time, the ball rod assembly matched with the sliding sleeve can be thrown from the wellhead and thrown into the sealing ball seat of the sliding sleeve through pumping and locked. At this time, the sliding sleeve can block the lower gas layer below, thereby not affecting the production of the upper gas layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the utility model not working;

[0017] Figure 3 This is the working diagram of the sliding sleeve opened in the utility model;

[0018] Figure 4 This is a working diagram of the club assembly of the utility model;

[0019] Figure 5 This is a gas layer display diagram of the utility model;

[0020] In the figure: 100, sleeve; 1, upper joint; 2, outer cylinder; 3, shear screw; 4, upper part of ball seat; 5, ball seat locking ring; 6, lower part of ball seat; 7, sleeve locking ring; 8, lower joint; 9, soluble ball; 10, ball rod assembly; 101, upper joint of ball rod; 102, ball rod sealing ring; 103, ball rod guide head; 11, sealing ball seat; 12, upper air layer; 13, lower air layer. DETAILED DESCRIPTION

[0021] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] like Figures 1-5As shown in the figure, a water plugging sliding sleeve of the present utility model includes an upper joint 1, an outer cylinder 2, and a lower joint 8 arranged from top to bottom. The inner wall of the upper end of the outer cylinder 2 is threadedly connected to the outer wall of the lower end of the upper joint 1, and the inner wall of the lower end of the outer cylinder 2 is threadedly connected to the outer wall of the upper end of the lower joint 8. A setting ball seat 11 is sleeved inside the outer cylinder 2, and a shear screw 3 is arranged between the setting ball seat 11 and the outer cylinder 2. The setting ball seat 11 can cooperate with a soluble ball 9 or a ball rod assembly 10 to block the internal passage of the setting ball seat 11. A plurality of through-flow holes that cooperate with the setting ball seat 11 are arranged along the circumferential direction on the side wall of the outer cylinder 2.

[0023] In this embodiment, the setting ball seat 11 includes an upper part 4 of the ball seat, a lower part 6 of the ball seat, and a ball seat lock ring 5. The outer side wall of the upper part 4 of the ball seat cooperates with the through-flow holes to open or block the through-flow holes. A shear screw 3 is arranged between the outer side wall of the upper part 4 of the ball seat and the outer cylinder 2. A ball seat lock ring 5 that cooperates with the ball rod assembly 10 is arranged on the inner side wall of the upper part 4 of the ball seat. The lower end of the upper part 4 of the ball seat is threadedly connected to the upper end of the lower part 6 of the ball seat.

[0024] Combined with Figure 2 As described above, a through hole that is wider at the top and narrower at the bottom and cooperates with the soluble ball 9 is arranged inside the upper part 4 of the ball seat.

[0025] In this embodiment, a sliding sleeve lock ring 7 that cooperates with the lower part 6 of the ball seat is arranged on the inner wall of the outer cylinder 2. By setting the inner wall of the sliding sleeve lock ring 7 to have a cut, the cut design can be compressed and opened, and a cut that cooperates with the inner wall of the sliding sleeve lock ring 7 is arranged on the outer wall of the lower part 6 of the ball seat, so as to be able to lock the lower part 6 of the ball seat and the sliding sleeve lock ring 7, making the setting ball seat 11 unable to retract and only able to move downward and be limited.

[0026] Combined with Figures 3-4 As shown in the figure, in this embodiment, the ball rod assembly 10 includes a ball rod upper joint 101, a ball rod sealing ring 102, and a ball rod guiding head 103. The lower end of the ball rod upper joint 101 is threadedly connected to the upper end of the ball rod guiding head 103. A ball rod sealing ring 102 for blocking the internal passage of the setting ball seat 11 is arranged between the ball rod upper joint 101 and the ball rod guiding head 103. By arranging serrated threads on the inner wall of the ball seat lock ring 5, and a serrated thread that cooperates with the inner wall of the ball seat lock ring 5 is opened on one side of the outer wall of the ball rod guiding head 103, the ball seat lock ring 5 and the ball rod guiding head 103 can be locked, making the ball rod assembly 10 unable to retract and positioning and sealing in this state.

[0027] Combined with Figure 5As shown, the upper packer and the lower packer are respectively connected and installed with the upper joint 1 and the lower joint 8 of the sliding sleeve 100, and then connected to the tubing. As the tubing is lowered into the casing, when it reaches the predetermined position, the wellhead is closed. Then, a setting ball matching the bottom of the pipe string is thrown into the wellhead. Then, a pump truck is used to pressurize and set the two packers. After the packers are completely set, continue to pressurize to knock down the setting ball into the bottom of the well. At this time, the upper gas layer 12 can be acidified or sand fracturing can be carried out. After the construction of the upper gas layer 12 is completed, a soluble ball 9 matching the sliding sleeve 100 is thrown from the wellhead. After building pressure, the sliding sleeve 100 is opened, and then acidification or sand fracturing construction can be carried out on the lower gas layer 13. After the construction of the lower gas layer 13 is completed, the soluble receiving ball 9 is dissolved, and then commingled production of the upper gas layer 12 and the lower gas layer 13 can be carried out. During the construction process or in the later stage of construction, the lower gas layer 13 may produce water. Once the gas well produces water, drainage or water plugging operations must be carried out to avoid affecting the production of the upper gas layer 12. At this time, a ball rod assembly 10 matching the sliding sleeve 100 can be thrown from the wellhead and locked inside the setting ball seat 11 of the sliding sleeve 100 through pumping. At this time, the sliding sleeve 100 can block the lower water-producing layer (lower gas layer 13), thus not affecting the production of the upper gas layer 12.

[0028] It should be noted that the description of the above technical solution is exemplary. This specification can be embodied in different forms and should not be construed as limited to the technical solutions described herein. On the contrary, providing these descriptions will make the disclosure of the present utility model thorough and complete, and will fully convey the scope disclosed in this specification to those skilled in the art. In addition, the technical solutions of the present utility model are only limited by the scope of the claims.

[0029] Finally, it should be pointed out that the above embodiments are only relatively representative examples of the present utility model. Obviously, the present utility model is not limited to the above embodiments and there can be many variations. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model should be considered as belonging to the protection scope of the present utility model.

Claims

1. A water-blocking sliding sleeve, characterized in that: It comprises an upper joint, an outer tube and a lower joint arranged from top to bottom, wherein the inner wall of the upper end of the outer tube is fixedly connected to the outer wall of the lower end of the upper joint, and the inner wall of the lower end of the outer tube is fixedly connected to the outer wall of the upper end of the lower joint; a sealing ball seat is provided in the inner sleeve of the outer tube, and a shear screw is provided between the sealing ball seat and the outer tube; the sealing ball seat can cooperate with a soluble ball or a ball rod assembly to block the internal channel of the sealing ball seat; a plurality of through-flow holes cooperating with the sealing ball seat are provided on the side wall of the outer tube along the circumferential direction.

2. The water-blocking sliding sleeve according to claim 1, characterized in that: The seating ball seat comprises a ball seat upper portion, a ball seat lower portion and a ball seat locking ring; the outer side wall of the ball seat upper portion cooperates with the flow hole to open or block the flow hole; a shear screw is provided between the outer side wall of the ball seat upper portion and the outer cylinder; the inner side wall of the ball seat upper portion is provided with a ball seat locking ring that cooperates with the ball rod assembly; the lower end of the ball seat upper portion is fixedly connected to the upper end of the ball seat lower portion.

3. The water-blocking sliding sleeve according to claim 2, characterized in that: A through hole which is wide at the top and narrow at the bottom and matches with the soluble ball is arranged inside the upper part of the ball seat.

4. The water-blocking sliding sleeve according to claim 2, characterized in that: The inner wall of the outer cylinder is provided with a sliding sleeve locking ring matched with the lower part of the ball seat.

5. The water-blocking sliding sleeve according to claim 4, characterized in that: The outer wall of the lower part of the ball seat is provided with ring teeth which cooperate with the sliding sleeve locking ring.

6. The water-blocking sliding sleeve according to claim 2, characterized in that: The club assembly includes a club upper joint, a club sealing ring and a club guide head. The lower end of the club upper joint is fixedly connected to the upper end of the club guide head. A club sealing ring for sealing the internal channel of the seating ball seat is provided between the club upper joint and the club guide head.

7. The water-blocking sliding sleeve according to claim 6, characterized in that: The outer wall of the club guide head is provided with ring teeth matched with the ball seat locking ring.

8. The water-blocking sliding sleeve according to claim 6, characterized in that: The club upper joint is threadedly connected to the club guide head.

9. The water-blocking sliding sleeve according to claim 1, characterized in that: The inner wall of the upper end of the outer cylinder is threadedly connected with the outer wall of the lower end of the upper joint.

10. The water-blocking sliding sleeve according to claim 1, characterized in that: The inner wall of the lower end of the outer cylinder is threadedly connected with the outer wall of the upper end of the lower joint.

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