Sliding sleeve facilitating flow control

Abstract

The utility model discloses a sliding sleeve convenient for controlling flow. The sliding sleeve comprises a pipe body, a control track and an inner bushing, a cavity is formed in the pipe body, and a bypass hole and a protrusion are arranged on the two sides in the cavity respectively. The control track is slidably sleeved with the cavity, and the protrusion is slidably connected to the control track. The inner lining is arranged in the cavity and fixedly connected with the control rail, a plurality of runner holes are formed in the side, close to the bypass hole, of the inner lining, and when the protrusion slides along the control rail, the runner holes and the bypass hole are communicated or closed. By means of the combined design of the control track, the protrusions and the flow channel holes, the flow control range is widened, and the flow control range is linear enough.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas production equipment, in particular to a sliding sleeve which is convenient for controlling flow. Background Art

[0002] The sleeve is one of the important completion tools, which can be opened or closed by hydraulic or wireline operation, and is mainly used for stratified mining, circulating well killing, gas lift, multi-layer mixed injection, circulating chemical agents, etc. The utility model patent with publication number CN202970659U publicly authorized the throttling pressure difference sleeve mechanism, which constructs the basic flow in and out structure by arranging at least two groups of flow holes along the axial direction of the pipe body; further, the sleeve is quickly opened and closed by using the lock groove and tooth structure, and different flow holes are aligned with the connecting hole according to different displacement devices, so that the size of the flow changes according to the size of the flow hole, thereby realizing the control of the flow.

[0003] However, when the throttling pressure difference sliding sleeve mechanism is used, it can only make different flow holes align with the connected holes, that is, the flow control range is relatively limited and not linear enough, which is not conducive to optimizing the production process and improving production efficiency by adjusting the opening degree of the sliding sleeve. Utility Model Content

[0004] The purpose of the utility model is to overcome the above technical deficiencies, to provide a sliding sleeve that is convenient for controlling flow, and to solve the technical problem that the control range of flow in the prior art is relatively limited and not linear enough.

[0005] In order to achieve the above technical purpose, the utility model adopts the following technical solutions:

[0006] In the first aspect, the utility model provides a sliding sleeve for convenient flow control, comprising a tube body, a control track and an inner sleeve; the tube body is provided with a cavity, and bypass holes and protrusions are respectively provided on both sides of the cavity; the control track sliding sleeve is arranged in the cavity, and the protrusion is slidably connected to the control track; the inner sleeve is arranged in the cavity and fixedly connected to the control track, and a plurality of flow channel holes are opened on one side of the inner sleeve close to the bypass hole, and when the protrusion slides along the control track, the flow channel hole and the bypass hole are either connected or closed.

[0007] In some embodiments, the control track is an annular sheet, which is sleeved in the cavity. The annular sheet is provided with a reciprocating groove along the axial direction of the cavity, and the reciprocating groove is evenly distributed along the circumference of the annular sheet, and every two adjacent reciprocating grooves are connected to each other.

[0008] In some embodiments, a guide surface is provided between every two adjacent reciprocating grooves, and the guide surface is used to guide the protrusion to slide toward another reciprocating groove.

[0009] In some embodiments, the groove length of the reciprocating groove is distributed in an arithmetically decreasing manner along the circumference of the annular sheet.

[0010] In some embodiments, the flow channel holes are distributed around the outer wall of the inner sleeve.

[0011] In some embodiments, the flow channel hole is an elliptical groove.

[0012] In some embodiments, a sealing component is provided in the cavity, and the sealing component is embedded in one side of the tube body.

[0013] In some embodiments, the cavity inner sleeve is provided with a reset device, which is arranged on a side of the inner sleeve away from the protrusion and is used to abut against the inner sleeve.

[0014] In some embodiments, the reset device is a spring.

[0015] In some embodiments, a floating piston is provided in the inner sleeve of the cavity. The floating piston is provided on a side of the reset device away from the inner sleeve, and the floating piston is used to abut against the reset device.

[0016] In a second aspect, the utility model also provides a sliding sleeve for facilitating flow control.

[0017] Compared with the prior art, the utility model provides a sliding sleeve that is convenient for controlling flow. By setting a control track, the protrusion is slidably connected to the control track, so that when the inner sleeve moves axially, the protrusion can slide back and forth along the track of the control track, thereby connecting or closing the flow channel hole and the bypass hole; further, in this process, the opening and closing degree of the flow channel hole and the bypass hole changes linearly with the movement of the track of the protrusion in the control track, that is, the flow rate is ultimately adjusted linearly, and the control range becomes larger as the track becomes longer, which is beneficial to optimize the production process and improve production efficiency by adjusting the opening degree of the sliding sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an isometric diagram of a sliding sleeve for convenient flow control provided by an embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the connection relationship between a control track and an inner sleeve in a sliding sleeve for convenient flow control provided by an embodiment of the utility model;

[0020] Figure 3 yes Figure 2 Schematic diagram of the expansion of the control track;

[0021] Figure 4 yes Figure 1The internal structure of Figure 1 (flow channel hole open state);

[0022] Figure 5 yes Figure 1 The internal structure of Figure 2 (Flow channel hole closed state).

[0023] Description of reference numerals:

[0024] 100, tube body; 110, cavity; 120, bypass hole; 130, protrusion; 200, control track; 210, annular sheet; 220, reciprocating slide groove; 221, guide surface; 300, inner sleeve; 310, flow channel hole; 311, elliptical groove; 400, sealing assembly; 500, reset device; 510, spring; 600, floating piston. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0026] In order to solve the technical problem that the flow control range is relatively limited and not linear enough, the utility model provides a sliding sleeve that is convenient for controlling the flow and can achieve linear flow control in a larger range.

[0027] It should be noted that the sliding sleeve for controlling flow described in the utility model is used for but not limited to controlling flow, etc. For the sake of convenience of explanation, in the utility model, only an example of a sliding sleeve for controlling flow being applied downhole is used for explanation. The principle of a sliding sleeve for controlling flow being applied to other types of equipment is substantially the same as the principle of being applied to completion operation equipment, and will not be described in detail here.

[0028] See also Figure 1 - Figure 5 ,in Figure 1 This is a schematic structural diagram of a sliding sleeve for controlling flow in an embodiment of the utility model, a sliding sleeve for controlling flow, comprising a tube body 100, a control track 200 and an inner sleeve 300; a cavity 110 is provided in the tube body 100, and bypass holes 120 and protrusions 130 are provided on both sides of the cavity 110; the control track 200 is slidingly sleeved in the cavity 110, and the protrusion 130 is slidingly connected to the control track 200; the inner sleeve 300 is arranged in the cavity 110 and fixedly connected to the control track 200, a plurality of flow channel holes 310 are opened on one side of the inner sleeve 300 close to the bypass hole 120, and when the protrusion 130 slides along the control track 200, the flow channel holes 310 and the bypass holes 120 are either connected or closed.

[0029] In this embodiment, by setting the control track 200 and using the protrusion 130 to slide with the control track 200, when the inner sleeve 300 moves, the protrusion 130 can slide back and forth with the control track 200, so that the flow channel hole 310 and the bypass hole 120 are either connected or closed; in this process, since the flow channel hole 310 and the bypass hole 120 can present different opening and closing states with the displacement change, the flow control can be more linear, and since the control track 200, the flow channel hole 310 and the bypass hole 120 can be reasonably designed in size according to the range requirements of the flow control, the range of the flow control is also effectively improved. It is beneficial to optimize the production process and improve production efficiency by adjusting the opening degree of the sliding sleeve.

[0030] In one embodiment, see Figure 2 , Figure 3 , Figure 4 The control track 200 is an annular sheet 210, which is sleeved in the cavity 110. The annular sheet 210 is provided with a reciprocating groove 220 along the axial direction of the cavity 110, and the reciprocating groove 220 is evenly distributed along the circumference of the annular sheet 210, and every two adjacent reciprocating grooves 220 are connected to each other.

[0031] In this embodiment, every two adjacent reciprocating grooves 220 are connected to each other, so that the inner bushing 300 can be displaced continuously and the cross-sectional area of ​​the connection between the flow channel hole 310 and the bypass hole 120 can change linearly.

[0032] In one embodiment, see Figure 3 , Figure 4 A guide surface 221 is provided between every two adjacent reciprocating grooves 220 , and the guide surface 221 is used to guide the protrusion 130 to slide toward another reciprocating groove 220 .

[0033] In this embodiment, the guide surface 221 can make the protrusion 130 slide more smoothly, which helps to improve the linearity of flow control.

[0034] In one embodiment, see Figure 3 The groove length of the reciprocating groove 220 is distributed in an arithmetically decreasing manner along the circumference of the annular sheet 210 .

[0035] In this embodiment, the groove length design of the reciprocating groove 220 makes the flow control more linear; specifically, since the groove length of the reciprocating groove 220 decreases regularly, the opening and closing degree of the flow channel hole 310 and the bypass hole 120 can be more linear and effectively improved.

[0036] In one embodiment, see Figure 2 The flow channel holes 310 are distributed around the outer wall of the inner sleeve 300 .

[0037] In this embodiment, the multiple designs of the flow channel holes 310 help to increase the flow rate per unit time and also help to increase the range of controllable flow rate.

[0038] In one embodiment, see Figure 2 , the flow channel hole 310 is an elliptical groove 311.

[0039] In this embodiment, the elliptical groove 311 is conducive to uniform force and facilitates the output of flow.

[0040] In one embodiment, see Figure 4 A sealing component 400 is disposed in the cavity 110 , and the sealing component 400 is embedded in one side of the tube body 100 .

[0041] In one embodiment, see Figure 4 A reset device 500 is sleeved in the cavity 110 . The reset device 500 is arranged on a side of the inner sleeve 300 away from the protrusion 130 and is used to abut against the inner sleeve 300 .

[0042] In this embodiment, the resetting device 500 can assist the inner sleeve 300 to move upward, thereby closing the flow channel hole 310 .

[0043] In one embodiment, see Figure 4 , the reset device 500 is a spring 510 .

[0044] In one embodiment, see Figure 4 , Figure 5 A floating piston 600 is sleeved in the cavity 110 . The floating piston 600 is disposed on a side of the reset device 500 away from the inner sleeve 300 . The floating piston 600 is used to abut against the reset device 500 .

[0045] In this embodiment, the floating piston 600 can balance the pressure generated in the cavity 110 to prevent liquid lock.

[0046] In order to better understand the present invention, the following Figures 1 to 5 The technical solution of the utility model is described in detail:

[0047] First, hydraulic oil is injected through the cavity 110, and the hydraulic oil in the cavity 110 generates pressure and pushes the inner sleeve 300 to move; then, as the inner sleeve 300 moves, the protrusion 130 reciprocates on the control track 200, so that the opening and closing degree of the flow channel hole 310 and the bypass hole 120 changes regularly, thereby realizing the function of controlling the flow size; then, after the operation is completed, when the pressure in the cavity 110 is less than the upward thrust of the reset device 500, the inner sleeve 300 will move upward, and the flow channel hole 310 will shrink or close. In the process of the inner sleeve 300 moving upward, different reciprocating slide grooves 220 will be replaced according to the structural design of the control track 200 to realize the switching of the route, and then realize the opening and closing adjustment. Since the above-mentioned flow channel holes 310 are designed to be multiple, and the design of the reciprocating groove 220 enables the protrusion 130 (the protrusion 130 is fixedly connected to the inner wall of the cavity 110) to drive the inner sleeve 300 to achieve a longer stroke displacement, the flow channel hole 310 and the bypass hole 120 can have a greater degree of opening and closing, and the flow rate can be linearly adjusted. The control range becomes larger as the trajectory (stroke) becomes longer, which is beneficial to optimize the production process and improve production efficiency by adjusting the opening degree of the sleeve.

[0048] The above specific implementation methods of the utility model do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A sliding sleeve for convenient flow control, characterized in that: include: A tube body, wherein the tube body has a cavity, and two sides of the cavity are respectively provided with a bypass hole and a protrusion; A control track, wherein the control track is slidably sleeved in the cavity, and the protrusion is slidably connected to the control track; An inner sleeve is arranged in the cavity and fixedly connected to the control track. A plurality of flow channel holes are opened on a side of the inner sleeve close to the bypass hole, and when the protrusion slides along the control track, the flow channel holes are either connected or closed to the bypass hole.

2. A sliding sleeve for facilitating flow control according to claim 1, characterized in that: The control track is an annular sheet, which is sleeved in the cavity. The annular sheet is provided with a reciprocating groove along the axial direction of the cavity, and the reciprocating groove is evenly distributed along the circumference of the annular sheet, and every two adjacent reciprocating grooves are connected to each other.

3. A sliding sleeve for facilitating flow control according to claim 2, characterized in that: A guide surface is provided between every two adjacent reciprocating grooves, and the guide surface is used to guide the protrusion to slide toward another reciprocating groove.

4. A sliding sleeve for facilitating flow control according to claim 2, characterized in that: The groove length of the reciprocating sliding groove is distributed in an arithmetically decreasing manner along the circumference of the annular sheet.

5. The sliding sleeve for facilitating flow control according to claim 1, characterized in that: The flow channel holes are distributed around the outer wall of the inner liner.

6. A sliding sleeve for facilitating flow control according to claim 5, characterized in that: The flow channel hole is an elliptical groove.

7. The sliding sleeve for facilitating flow control according to claim 1, characterized in that: A sealing component is arranged in the cavity and is embedded in one side of the tube body.

8. The sliding sleeve for facilitating flow control according to claim 1, characterized in that: The cavity inner sleeve is provided with a reset device, which is arranged on a side of the inner sleeve away from the protrusion and is used to abut against the inner sleeve.

9. A sliding sleeve for facilitating flow control according to claim 8, characterized in that: The reset device is a spring.

10. The sliding sleeve for facilitating flow control according to claim 8, characterized in that: A floating piston is provided in the inner sleeve of the cavity. The floating piston is provided on a side of the reset device away from the inner sleeve. The floating piston is used to abut against the reset device.

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