Oil drainage device with recyclable switch

Abstract

The utility model discloses an oil drainage device with a recyclable switch, which comprises a valve body, a lower joint, a plugging mechanism and an operating pull rod, the top of the valve body is used for connecting an oil string, the top of the lower joint is sleeved with the bottom of the valve body, the lower joint is connected to the oil string, and an oil discharge hole is arranged at the bottom of the valve body and close to the lower joint; the plugging mechanism is arranged in the middle of the valve body and used for plugging the oil discharge hole. The control pull rod is connected with the middle of the plugging mechanism in a penetrating mode and connected between the sucker rod and the oil well pump piston. According to the oil drainage device, the valve body, the plugging mechanism and the control pull rod jointly form an oil drainage device structure capable of being repeatedly used, the control pull rod penetrates through the plugging mechanism, so that oil discharge plugging of the valve body can be repeatedly operated and controlled, and under the structural arrangement, the oil drainage device is convenient to use. And the pumping well can be more convenient in the production and well washing process.

Description

Technical Field

[0001] The utility model relates to the technical field of oil field production, in particular to an oil drainer with a circulating switch. Background Art

[0002] Oilfield pumping wells often use tubing drainers. The main function of the tubing drainer is: when the pumping tubing is pulled out of the wellbore, the oil in the tubing flows into the well through the tubing drainer, preventing the oil in the tubing from being brought to the ground and causing environmental pollution and fire.

[0003] At present, the oil drainers used in the oil field are all opened once, that is, once the oil drainers are opened in the downhole state, they cannot be closed again. This limits the implementation of measures such as opening the oil drainers for well washing during the production process of the pumping well. Utility Model Content

[0004] The purpose of the utility model is to provide an oil drain with a cyclic switch to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: an oil drain with a cyclic switch, comprising a valve body, the top of which is used to connect to an oil pipe string, and further comprising:

[0006] A lower joint, the top of which is sleeved with the bottom of the valve body, and the lower joint is connected to the oil pipe string, and an oil unloading hole is provided at the bottom of the valve body near the lower joint;

[0007] A blocking mechanism is provided in the middle of the valve body and is used to block the oil unloading hole;

[0008] An operating pull rod is connected through the middle portion of the blocking mechanism and is connected between the sucker rod and the oil pump piston.

[0009] Preferably, the blocking mechanism includes a sliding sleeve, which is slidably inserted into the middle of the valve body, and the top and bottom of the sliding sleeve are both provided with expansion structures, and a sealing structure is provided between the outer wall of the sliding sleeve and the inner wall of the valve body.

[0010] Preferably, the expansion structure includes side claw springs, and multiple side claw springs are respectively arranged at the top and bottom of the sliding sleeve, and multiple side claw springs are respectively provided with multiple claw spring heads at one end away from the sliding sleeve, and one group of the side claw springs and claw spring heads are inserted and connected in the lower joint.

[0011] Preferably, a slot structure is provided at the top of the valve body and the middle of the lower joint, and the slot structure is used for inserting and accommodating the side claw spring and the claw spring head.

[0012] Preferably, the slot structure includes:

[0013] Expansion holes, wherein a plurality of expansion holes are respectively opened on the inner wall of the top of the valve body and the inner wall of the bottom of the lower joint, and the expansion holes are used for inserting and accommodating the claw spring head when it expands;

[0014] The plurality of gathering holes are respectively opened on the middle inner wall of the valve body and the top inner wall of the lower joint, and the gathering holes are used for squeezing and closing the claw spring heads.

[0015] Preferably, the sealing structure includes:

[0016] A first rubber ring, wherein a plurality of the first rubber rings are sleeved on the top of the sliding sleeve and are used for sealing between the top of the sliding sleeve and the valve body;

[0017] The trapezoidal rubber ring is sleeved on the bottom of the sliding sleeve and is used for sealing between the bottom of the sliding sleeve and the valve body.

[0018] Preferably, a second rubber ring is provided between the top of the lower joint and the bottom connection of the valve body, and the second rubber ring is used for sealing the connection between the lower joint and the valve body.

[0019] The technical effects and advantages of this utility model are:

[0020] The oil drainer of the utility model is composed of a valve body, a sealing mechanism and an operating pull rod to form a reusable oil drainer structure. By inserting the operating pull rod into the sealing mechanism, the oil unloading and sealing of the valve body can be repeatedly controlled. With such a structural setting, the oil pumping well can be more convenient in the process of production and well washing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structural connection of the utility model.

[0022] Figure 2 This is a schematic diagram of the overall structure of the utility model when the operating rod does not enter the sliding sleeve.

[0023] Figure 3 This is a schematic diagram of the overall structure of the operating pull rod of the utility model through the top side claw spring.

[0024] Figure 4 This is a schematic diagram of the overall structure of the operating pull rod of the utility model through the bottom side claw spring.

[0025] Figure 5 This is a schematic diagram of the overall structure of the utility model after the operating rod passes through the sliding sleeve.

[0026] Figure 6 This is a schematic diagram of the connection between the utility model and the oil pumping pipe.

[0027] In the figure: 1. Valve body; 101. Expanded hole; 102. Retracted hole; 103. Oil unloading hole; 2. Operating lever; 3. Sleeve; 4. Lower joint; 5. First rubber ring; 6. Trapezoidal rubber ring; 7. Second rubber ring; 8. Side claw spring; 801. Claw spring head. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] The utility model provides Figure 1-5 The oil drain with a cyclic switch shown in the figure includes a valve body 1, the top of the valve body 1 is used to connect the oil pipe string, and also includes:

[0030] The lower joint 4, the top of the lower joint 4 is sleeved with the bottom of the valve body 1, and the lower joint 4 is connected to the oil pipe string. The bottom of the valve body 1 and near the lower joint 4 are provided with an oil unloading hole 103;

[0031] A second rubber ring 7 is provided between the top of the lower joint 4 and the bottom connection of the valve body 1 , and the second rubber ring 7 is used for sealing the connection between the lower joint 4 and the valve body 1 .

[0032] refer to Figure 6 As shown, the top of the valve body 1 and the lower joint 4 are both connected to the oil pumping string 10-20m away from the top of the oil pump, and the bottom of the valve body 1 is connected to the top of the lower joint 4. At the same time, in order to ensure the sealing of the connection between the valve body 1 and the lower joint 4, a second rubber ring 7 is used to seal the connection between the two, thereby ensuring that the valve body 1 and the lower joint 4 form a stable and sealed connection.

[0033] The operating rod 2 is connected through the middle of the blocking mechanism, and the operating rod 2 is connected between the sucker rod and the oil pump piston.

[0034] It should be noted that the middle portion of the operating rod 2 is a cylindrical structure, the diameter of the middle portion of the operating rod 2 is 1.5-2 times the diameter of the two ends, and the operating rod 2 is connected between the sucker rod and the oil pump piston.

[0035] The blocking mechanism is arranged in the middle of the valve body 1 and is used to block the oil unloading hole 103;

[0036] Specifically, the blocking mechanism includes a sleeve 3, which is slidably inserted into the middle of the valve body 1. The top and bottom of the sleeve 3 are both provided with expansion structures, and a sealing structure is provided between the outer wall of the sleeve 3 and the inner wall of the valve body 1.

[0037] Furthermore, the expansion structure includes side claw springs 8, and multiple side claw springs 8 are respectively arranged at the top and bottom of the sliding sleeve 3. Multiple side claw springs 8 are respectively provided with multiple claw spring heads 801 at one end away from the sliding sleeve 3, and one group of side claw springs 8 and claw spring heads 801 are inserted and connected in the lower joint 4.

[0038] Furthermore, a slot structure is provided on the top of the valve body 1 and the middle of the lower joint 4, and the slot structure is used for inserting and accommodating the side claw spring 8 and the claw spring head 801.

[0039] Specifically, the slot structure includes:

[0040] The plurality of expansion holes 101 are respectively opened on the inner wall of the top of the valve body 1 and the inner wall of the bottom of the lower joint 4. The expansion holes 101 are used for inserting and accommodating the claw spring head 801 when it expands;

[0041] The gathering holes 102 , multiple groups of gathering holes 102 are respectively opened on the middle inner wall of the valve body 1 and the top inner wall of the lower joint 4 , and the gathering holes 102 are used for squeezing the claw spring heads 801 together.

[0042] Specifically, the sealing structure includes:

[0043] First rubber rings 5, multiple first rubber rings 5 ​​are sleeved on the top of the sliding sleeve 3, and multiple first rubber rings 5 ​​are used to seal between the top of the sliding sleeve 3 and the valve body 1;

[0044] The trapezoidal rubber ring 6 is sleeved on the bottom of the sliding sleeve 3 and is used for sealing between the bottom of the sliding sleeve 3 and the valve body 1 .

[0045] It should be noted that, through the structural combination of the first rubber ring 5 and the trapezoidal rubber ring 6, when the sleeve 3 slides inside the valve body 1, when the oil unloading hole 103 is in a closed state, the first rubber ring 5 and the trapezoidal rubber ring 6 are respectively arranged at the top and bottom ends of the oil unloading hole 103, so as to ensure that the oil unloading hole 103 is tightly sealed.

[0046] The operating principle of this solution is to connect the valve body 1, the sliding sleeve 3 and the lower joint 4 of the utility model to the lower part of the pumping pipe string, and lower it into the well bottom to a predetermined depth along with the pumping pipe string. When the cam 801 of the first end of the oil pump 2 is lowered to the bottom of the oil pump 2, the cam 801 of the first end of the oil pump 2 is released, and the oil pump 2 is turned off, so that the oil pump 2 can be turned off immediately.

[0047] When the sucker tube is pulled out of the well, the sucker rod needs to be pulled out of the sucker tube first. When the sucker rod is lifted 10-20m from the sucker tube, the largest cylinder in the middle of the operating pull rod 2 will contact the side claw spring 8 at the bottom of the sliding sleeve 3. The process of opening and closing the oil drainer is the same as the above-mentioned process of opening and closing the oil drainer. Similarly, the oil drainer is changed from closed to open. The up and down movement of the sucker rod can make the oil drainer cycle open or closed.

[0048] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An oil drain with a cyclic switch, comprising a valve body (1), the top of the valve body (1) being used to connect an oil pipe string, characterized in that: Also includes: A lower joint (4), the top of which is sleeved with the bottom of the valve body (1), and the lower joint (4) is connected to the oil pipe string, and an oil unloading hole (103) is provided at the bottom of the valve body (1) and near the lower joint (4); A blocking mechanism, the blocking mechanism being arranged in the middle of the valve body (1) and being used for blocking the oil unloading hole (103); An operating rod (2) is connected through the middle of the blocking mechanism, and the operating rod (2) is connected between the sucker rod and the oil pump piston.

2. The oil drain with a cyclic switch according to claim 1, characterized in that: The blocking mechanism comprises a sliding sleeve (3), the sliding sleeve (3) being slidably inserted and connected to the middle part of the valve body (1), the top and bottom of the sliding sleeve (3) being provided with expansion structures, and a sealing structure being provided between the outer wall of the sliding sleeve (3) and the inner wall of the valve body (1).

3. The oil drain with a cyclic switch according to claim 2, characterized in that: The expansion structure includes side claw springs (8), and a plurality of the side claw springs (8) are respectively arranged at the top and bottom of the sliding sleeve (3). A plurality of claw spring heads (801) are respectively arranged at one end of the side claw springs (8) away from the sliding sleeve (3), and one group of the side claw springs (8) and the claw spring heads (801) are inserted and connected in the lower joint (4).

4. The oil drain with a cyclic switch according to claim 3, characterized in that: The top of the valve body (1) and the middle of the lower joint (4) are both provided with slotted hole structures, and the slotted hole structures are used for inserting and accommodating the side claw spring (8) and the claw spring head (801).

5. The oil drain with a cyclic switch according to claim 4, characterized in that: The slot structure comprises: Expanded holes (101), a plurality of expanded holes (101) are respectively provided on the inner wall of the top of the valve body (1) and the inner wall of the bottom of the lower joint (4), and the expanded holes (101) are used for inserting and accommodating the claw spring head (801) when it expands; The plurality of gathering holes (102) are respectively provided on the middle inner wall of the valve body (1) and the top inner wall of the lower joint (4), and the gathering holes (102) are used for squeezing the claw spring heads (801) together.

6. The oil drain with a cyclic switch according to claim 2, characterized in that: The sealing structure comprises: A first rubber ring (5), wherein a plurality of the first rubber rings (5) are sleeved on the top of the sliding sleeve (3), and the plurality of the first rubber rings (5) are used for sealing between the top of the sliding sleeve (3) and the valve body (1); A trapezoidal rubber ring (6) is sleeved on the bottom of the sliding sleeve (3) and is used for sealing between the bottom of the sliding sleeve (3) and the valve body (1).

7. The oil drain with a cyclic switch according to claim 1, characterized in that: A second rubber ring (7) is provided between the top of the lower joint (4) and the bottom connection of the valve body (1), and the second rubber ring (7) is used for sealing the connection between the lower joint (4) and the valve body (1).

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