Sliding sleeve switch

Abstract

The utility model discloses a sliding sleeve switch, which belongs to the technical field of petroleum and natural gas, and comprises a switch main body, a sliding sleeve and a plugging piece, a first inner cavity extending along the axial direction of the switch main body is arranged in the switch main body in a penetrating manner, and the side wall of the switch main body is provided with a first flow channel port communicated with the first inner cavity; the sliding sleeve is coaxially arranged in the first inner cavity, the outer side wall of the sliding sleeve abuts against the first inner cavity in a sealed mode, a second inner cavity extending in the axial direction of the sliding sleeve is formed in the sliding sleeve in a penetrating mode, and a second runner opening communicated with the second inner cavity is formed in the sliding sleeve; the blocking piece is arranged in the first flow channel opening in a blocking mode and can be dissolved by brine in the salt cavern gas storage; when the sliding sleeve is at the first position, the plugging piece is dissolved, and the second flow channel opening and the first flow channel opening which are coaxially arranged are communicated; and at the second position, the second flow channel opening and the first flow channel opening are staggered, and the outer wall of the sliding sleeve blocks the first flow channel opening. Only one sliding sleeve needs to be arranged, the requirement that the sliding sleeve switch can be closed again after being opened can be met, the structure is simple, and operation is convenient and fast.

Description

Technical Field

[0001] The utility model relates to the technical field of petroleum and natural gas, in particular to a sliding sleeve switch. Background Art

[0002] Salt cavern gas storage refers to a facility that uses underground cavities formed by water-soluble salt mining in underground salt layers or salt domes to store natural gas. During the gas injection and brine removal process of the salt cavern gas storage, since the brine removal pipe column cannot be lowered into the deepest part of the cavity, more than 1 / 2 of the brine in the cavity is left at the bottom of the cavity after the gas injection and brine removal is completed, resulting in a waste of the effective volume of the cavity. In order to maximize the discharge of the remaining brine after gas injection and brine removal to increase the gas storage volume, it is necessary to close the upper brine discharge channel, and then use the lower brine discharge channel to perform the brine discharge operation. Therefore, a sliding sleeve switch that can be opened and closed again is required during the brine discharge process.

[0003] Chinese patent CN116006126A discloses a ball-throwing opening and closing sliding sleeve, which is provided with an opening sliding sleeve and an inner closing sliding sleeve. The first soluble ball pushes the opening sliding sleeve to open the brine discharge hole for brine discharge, and the second soluble ball pushes the inner closing sliding sleeve to block the brine discharge hole.

[0004] However, in the above patent, not only is the structure of the sliding sleeve switch complicated and difficult to manufacture, but also the cost is high, and the operation needs to put in the soluble ball many times during the brine discharge operation, which is also very cumbersome. Therefore, a sliding sleeve switch is urgently needed to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a sliding sleeve switch to solve the technical problems of the sliding sleeve switch which can be closed again after being opened in the prior art, such as the complex structure and cumbersome operation process.

[0006] As conceived above, the technical solution adopted by the utility model is:

[0007] Slide switch, comprising:

[0008] A switch body, wherein a first inner cavity extending along the axial direction of the switch body is provided through the switch body, and a first flow channel opening communicating with the first inner cavity is provided on a side wall of the switch body;

[0009] A sliding sleeve is coaxially and movably disposed in the first inner cavity, the outer wall of the sliding sleeve is in sealing contact with the cavity wall of the first inner cavity, a second inner cavity extending along the axial direction of the sliding sleeve is penetrated by the sliding sleeve, and a second flow channel opening communicating with the second inner cavity is disposed on the sliding sleeve;

[0010] A plugging member, which is disposed in the first flow channel and can be dissolved by brine in the salt cavern gas storage reservoir;

[0011] The sliding sleeve has a first position and a second position; in the first position, the second flow channel opening is connected to the first flow channel opening; in the second position, the second flow channel opening is staggered with the first flow channel opening and the outer wall of the sliding sleeve blocks the first flow channel opening.

[0012] Furthermore, it also includes a shearable piece, which passes through the side wall of the switch body and the side wall of the sliding sleeve in sequence in the radial direction, and the sliding sleeve can shear the shearable piece when switching from the first position to the second position.

[0013] Furthermore, the sliding sleeve switch further comprises a closed position locking mechanism, which is disposed in the first inner cavity and can lock the sliding sleeve in the second position.

[0014] Furthermore, the closed position locking mechanism comprises:

[0015] A retaining ring, arranged on the switch body, the retaining ring being provided with a positioning step and a clamping groove;

[0016] The retaining spring is arranged on the outer side of the sliding sleeve. In the first position, the retaining spring is contracted. In the second position, the sliding sleeve abuts against the positioning step, and the retaining spring is engaged with the engaging groove.

[0017] Furthermore, it also includes a pressurizing ball, which is used to be put into the first inner cavity and abut against the upper end of the sliding sleeve, so that the sliding sleeve switches from the first position to the second position.

[0018] Furthermore, an inverted conical limiting surface is provided at the top end of the sliding sleeve, and the outer peripheral surface of the pressure ball can abut against the inverted conical limiting surface.

[0019] Furthermore, it also includes a filter element, which is arranged on the outer side wall of the switch body corresponding to the first flow channel opening.

[0020] Furthermore, it also includes a fixing ring, which is fixedly connected to the filter element and is fixedly arranged on the outer side wall of the switch body.

[0021] Furthermore, a positioning portion is provided in the first flow channel opening, and the blocking member is provided on the positioning portion via a pressure ring.

[0022] Furthermore, a plurality of the first flow channel openings are arranged at intervals along the circumference of the switch body, and a plurality of the second flow channel openings are arranged at intervals along the circumference of the sliding sleeve. In the first position, the first flow channel openings and the second flow channel openings are arranged coaxially in a one-to-one correspondence.

[0023] Beneficial effects of the utility model:

[0024] The utility model proposes a sliding sleeve switch, in which a plugging piece is arranged at the first flow channel opening, and the plugging piece can be dissolved by the brine in the salt cavern gas storage reservoir, and the sliding sleeve has a first position and a second position. In the first position, the second flow channel opening is arranged coaxially with the first flow channel opening; in this arrangement, after the plugging piece is dissolved in the first position, the first flow channel opening and the second flow channel opening can be connected to discharge the brine. In the second position, the second flow channel opening and the first flow channel opening are staggered and the outer wall of the sliding sleeve blocks the first flow channel opening; in this arrangement, when the sliding sleeve is switched to the second position, the first flow channel opening can be blocked. The sliding sleeve switch only needs to be provided with a sliding sleeve, so that the requirement that the sliding sleeve switch can be closed again after being opened can be realized. Not only is the structure simple and easy to manufacture, but it is also very convenient to operate during application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0026] Figure 1 It is a half-section view of the sliding sleeve switch provided by the embodiment of the utility model;

[0027] Figure 2 yes Figure 1 A partial enlarged view of the middle A;

[0028] Figure 3 yes Figure 1 A partial enlarged view of point B in the middle;

[0029] Figure 4 yes Figure 1 Sectional view at CC;

[0030] Figure 5 It is a half-section view of the sliding sleeve of the sliding sleeve switch provided by an embodiment of the utility model when the sliding sleeve is located in the first working position and the blocking member is dissolved.

[0031] Figure 6 It is a half-section view of the sliding sleeve of the sliding sleeve switch provided by an embodiment of the utility model when the sliding sleeve is located in the second working position.

[0032] In the figure:

[0033] 1. Switch body; 11. First inner cavity; 12. First flow channel outlet; 121. Positioning part; 2. Sleeve; 21. Second inner cavity; 22. Second flow channel outlet; 23. Inverted cone limit surface; 3. Blocking part; 4. Shearable part; 5. Pressurized ball; 6. Retaining ring; 61. Positioning step; 62. Slot; 7. Retaining spring; 8. Filter element; 9. Fixing ring; 10. Pressing ring. DETAILED DESCRIPTION

[0034] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all of them.

[0035] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships 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. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable 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, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The sliding sleeve switch provided in this embodiment can be applied to the field of petroleum and natural gas technology, especially in the process of gas injection and brine removal in forming a salt cavern gas storage reservoir, so as to solve the technical problems of the sliding sleeve switch in the prior art that can be closed again after opening, which has a complex structure and cumbersome operation process.

[0038] like Figure 1 and Figure 2 As shown, the sliding sleeve switch includes a switch body 1 , a sliding sleeve 2 and a blocking member 3 .

[0039] A first inner cavity 11 extending along the axial direction of the switch body 1 is provided through the switch body 1 , and a first flow channel opening 12 communicating with the first inner cavity 11 is provided on the side wall of the switch body 1 .

[0040] The sleeve 2 is coaxially and movably arranged in the first inner cavity 11, the outer wall of the sleeve 2 is sealed and abutted against the cavity wall of the first inner cavity 11, a second inner cavity 21 extending along its own axial direction is penetrated by the sleeve 2, and a second flow channel 22 communicating with the second inner cavity 21 is arranged on the sleeve 2.

[0041] The plugging member 3 is disposed in the first flow channel opening 12 for plugging, and can be dissolved by the brine in the salt cavern gas storage reservoir.

[0042] The sleeve 2 has a first position and a second position; in the first position, the second flow channel opening 22 is connected to the first flow channel opening 12; in the second position, the second flow channel opening 22 is staggered with the first flow channel opening 12 and the outer wall of the sleeve 2 blocks the first flow channel opening 12.

[0043] The sliding sleeve switch provided in this embodiment is as follows: Figure 1 As shown in FIG. 1 , in the initial state, the sleeve 2 is located in the first position, the second flow channel opening 22 is coaxially arranged with the first flow channel opening 12, but is blocked by the blocking member 3 and is not connected, that is, the sleeve switch is in the closed state at this time. After the sleeve switch is lowered into the brine well for a period of time, the blocking member 3 reacts and dissolves with the brine in the salt cavern gas storage reservoir, as shown in FIG. Figure 5 As shown, the first flow channel opening 12 is connected to the first inner cavity 11 through the second flow channel opening 22, and the brine above the first flow channel opening 12 is discharged. Figure 5 The middle arrow indicates the flow direction of the brine during the drainage operation. When the brine above the first flow channel 12 is completely discharged, the sleeve 2 is moved to the second position. Figure 6 As shown, at this time, the second flow channel opening 22 is staggered with the first flow channel opening 12 and the outer wall of the sleeve 2 blocks the first flow channel opening 12, and the sleeve switch is in the closed position again. The above operation can realize the opening and closing of the sleeve switch, which is simple and convenient to operate, with low operation cost and low operation risk.

[0044] Specifically, the blocking member 3 is made of magnesium alloy or aluminum alloy.

[0045] Furthermore, a sealing groove is provided on the inner side of the switch body 1 or the outer side of the sliding sleeve 2, and a sealing ring is provided in the sealing groove to improve the sealing performance between the sliding sleeve 2 and the switch body 1. Figure 2 As shown, in this embodiment, the sealing groove is arranged on the inner side wall of the switch body 1 .

[0046] Furthermore, the sliding sleeve switch further includes a shearable piece 4, which radially passes through the side wall of the switch body 1 and the side wall of the sliding sleeve 2 in sequence, and can shear off the shearable piece 4 when the sliding sleeve 2 switches from the first position to the second position. By providing the shearable piece 4, it can not only be ensured that when the sliding sleeve 2 is in the first position, the sliding sleeve 2 and the switch body 1 will not move relative to each other, resulting in the blocking of the first flow channel 12 and affecting the brine discharge operation, and the sliding sleeve switch is ensured to be in the open state; and when the position of the sliding sleeve 2 needs to be switched, the shearable piece 4 can be directly sheared off through the sliding sleeve 2 to release the lock of the sliding sleeve 2.

[0047] Specifically, the shearable piece 4 is a pin.

[0048] Furthermore, the sliding sleeve switch also includes a closed position locking mechanism, which is arranged in the first inner cavity 11 and can lock the sliding sleeve 2 in the second position to ensure that the sliding sleeve switch can be stably in the closed state.

[0049] Furthermore, if Figure 1 and Figure 3 As shown, the closed position locking mechanism includes a retaining ring 6 and a retaining spring 7. The retaining ring 6 is arranged on the switch body 1, and is provided with a positioning step 61 and a clamping groove 62; the retaining spring 7 is arranged on the outside of the sliding sleeve 2, and in the first position, the retaining spring 7 is contracted; in the second position, the sliding sleeve 2 abuts against the positioning step 61, and the retaining spring 7 is clamped with the clamping groove 62. In this embodiment, the retaining ring 6 is arranged at the lower end of the switch body 1.

[0050] Specifically, when the sleeve 2 is in the first position, the switch body 1 presses the retaining spring 7 into the groove on the outside of the sleeve 2. When the sleeve 2 switches from the first position to the second position, the sleeve 2 drives the retaining spring 7 to move at the same time. When the sleeve 2 is in the second position, the sleeve 2 abuts against the positioning step 61, and the retaining spring 7 pops outward and engages in the retaining groove 62 of the retaining ring 6, locking the sleeve 2 in the closed position.

[0051] Specifically, the inner diameter of the positioning ring formed by the side surface of the positioning step 61 is the same as the outer diameter of the sliding sleeve 2 , and the inner diameter of the clamping groove 62 is larger than the outer diameter of the sliding sleeve 2 .

[0052] Furthermore, the sliding sleeve switch further comprises a pressurizing ball 5, which is used to be put into the first inner cavity 11 and abut against the upper end of the sliding sleeve 2, so that the sliding sleeve 2 is switched from the first position to the second position.

[0053] Furthermore, an inverted conical limiting surface 23 is provided at the top of the sleeve 2, and the outer peripheral surface of the pressure ball 5 can abut against the inverted conical limiting surface 23. When the sleeve 2 needs to be switched from the first position to the second position, the pressure ball 5 is inserted, and the pressure ball 5 falls into the first inner cavity 11 and abuts against the inverted conical limiting surface 23 at the top of the sleeve 2, closing the entrance of the sleeve 2, and then the pressing operation is performed. The pressure of the first inner cavity 11 pushes the pressure ball 5 and the sleeve 2 to slide down, and the sleeve 2 shears the shearable part 4 during the sliding process, and the sleeve 2 finally moves to the second position.

[0054] Furthermore, if Figure 1 and Figure 4 As shown, in order to prevent impurities in the brine from entering the first flow channel opening 12 , the sliding sleeve switch further includes a filter 8 , which is disposed on the outer side wall of the switch body 1 corresponding to the first flow channel opening 12 .

[0055] Specifically, the filter element 8 is a filter mesh.

[0056] Furthermore, in order to facilitate the replacement of the filter element 8 , a fixing ring 9 is further included. The fixing ring 9 is fixedly connected to the filter element 8 , and the fixing ring 9 is fixedly arranged on the outer side wall of the switch body 1 .

[0057] Specifically, a positioning shoulder is provided on the switch body 1 , and the fixing ring 9 is threadedly sleeved on the switch body 1 and the filter element 8 abuts against the positioning shoulder.

[0058] In this embodiment, if Figure 2 As shown, a positioning portion 121 is provided in the first flow channel opening 12, and the plugging member 3 is arranged on the positioning portion 121 through a pressing ring 10. The pressing ring 10 can not only prevent the sliding sleeve switch from falling during the process of being lowered into the brine drainage well, ensuring that the sliding sleeve switch is in a closed state, but also facilitates the installation of the plugging member 3. When the sliding sleeve switch is reused, it is only necessary to remove the pressing ring 10, replace the new plugging member 3, and then fix it through the pressing ring 10.

[0059] Specifically, the pressure ring 10 is an elastic pressure ring.

[0060] Furthermore, in order to improve the sealing performance of the sliding sleeve switch, a second sealing ring is further provided between the blocking member 3 and the positioning portion 121 .

[0061] Furthermore, if Figure 4 As shown, in order to improve the brine discharge efficiency, a plurality of first flow openings 12 are arranged at circumferential intervals along the switch body 1, and a plurality of second flow openings 22 are arranged at circumferential intervals along the sleeve 2. In the first position, the first flow openings 12 and the second flow openings 22 are coaxially arranged one by one.

[0062] It should be noted that, in this embodiment, the materials of the plugging member 3 and the pressurizing ball 5 are both materials that can be dissolved by the brine in the salt cavern gas storage. Exemplarily, the materials of the plugging member 3 and the pressurizing ball 5 are metals or alloys that can chemically react with the brine in the salt cavern gas storage, and can be magnesium alloys or aluminum alloys.

[0063] The above embodiments are only to illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and modifications, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A sliding sleeve switch, characterized in that: include: A switch body (1), wherein a first inner cavity (11) extending along the axial direction of the switch body (1) is provided through the switch body (1), and a first flow channel opening (12) communicating with the first inner cavity (11) is provided on a side wall of the switch body (1); A sliding sleeve (2) is coaxially and movably arranged in the first inner cavity (11), the outer wall of the sliding sleeve (2) is in sealing contact with the cavity wall of the first inner cavity (11), a second inner cavity (21) extending along the axial direction of the sliding sleeve (2) is penetrated by the sliding sleeve (2), and a second flow channel (22) communicating with the second inner cavity (21) is arranged on the sliding sleeve (2); A plugging member (3) is disposed in the first flow channel opening (12) for plugging and can be dissolved by brine in the salt cavern gas storage reservoir; The sliding sleeve (2) has a first position and a second position; in the first position, the second flow channel opening (22) is connected to the first flow channel opening (12); in the second position, the second flow channel opening (22) and the first flow channel opening (12) are staggered and the outer wall of the sliding sleeve (2) blocks the first flow channel opening (12).

2. The sliding sleeve switch according to claim 1, characterized in that: It also comprises a shearable piece (4), which passes through the side wall of the switch body (1) and the side wall of the sliding sleeve (2) in sequence in the radial direction, and the shearable piece (4) can be sheared when the sliding sleeve (2) switches from the first position to the second position.

3. The sliding sleeve switch according to claim 1, characterized in that: The sliding sleeve switch further comprises a closed position locking mechanism, which is arranged in the first inner cavity (11) and is capable of locking the sliding sleeve (2) in the second position.

4. The sliding sleeve switch according to claim 3, characterized in that: The closed position locking mechanism comprises: A retaining ring (6) is arranged on the switch body (1), and the retaining ring (6) is provided with a positioning step (61) and a clamping groove (62); The retaining spring (7) is arranged on the outside of the sliding sleeve (2). In the first position, the retaining spring (7) is contracted; in the second position, the sliding sleeve (2) abuts against the positioning step (61), and the retaining spring (7) is engaged with the engaging groove (62).

5. The sliding sleeve switch according to claim 1, characterized in that: It also includes a pressurizing ball (5), which is used to be dropped into the first inner cavity (11) and abut against the upper end of the sliding sleeve (2) so that the sliding sleeve (2) switches from the first position to the second position.

6. The sliding sleeve switch according to claim 5, characterized in that: The top end of the sliding sleeve (2) is provided with an inverted conical limiting surface (23), and the outer peripheral surface of the pressure ball (5) can abut against the inverted conical limiting surface (23).

7. The sliding sleeve switch according to claim 1, characterized in that: It also comprises a filter element (8), wherein the filter element (8) is arranged on the outer side wall of the switch body (1) corresponding to the first flow channel opening (12).

8. The sliding sleeve switch according to claim 7, characterized in that: It also comprises a fixing ring (9), the fixing ring (9) being fixedly connected to the filter element (8), and the fixing ring (9) being fixedly arranged on the outer side wall of the switch body (1).

9. The sliding sleeve switch according to any one of claims 1 to 8, characterized in that: A positioning portion (121) is provided in the first flow channel opening (12), and the blocking member (3) is arranged on the positioning portion (121) via a pressure ring (10).

10. The sliding sleeve switch according to any one of claims 1 to 8, characterized in that: A plurality of the first flow channel openings (12) are arranged at intervals along the circumference of the switch body (1), and a plurality of the second flow channel openings (22) are arranged at intervals along the circumference of the sliding sleeve (2). In the first position, the first flow channel openings (12) and the second flow channel openings (22) are arranged coaxially in a one-to-one correspondence.

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