Water-saving diameter-changeable separator for well washing

Abstract

The utility model relates to a water-saving diameter-changeable separator for well washing, and relates to the technical field of oil exploitation. A water-saving diameter-changeable separator for well washing comprises an elastic hydraulic sealing rubber bowl which is located in a casing pipe and arranged on the outer edge of the top of a coupling used for connecting two adjacent oil pipes in a sleeving mode, and the oil pipes are located in the casing pipe; the sealing clamping and supporting ring is wrapped in the hydraulic sealing rubber bowl; the horizontally-movable sealing ring is located on the sealing clamping and supporting ring and wrapped in the hydraulic sealing rubber bowl, and the outer diameter of the horizontally-movable sealing ring is larger than that of the sealing clamping and supporting ring; and a side wall valve for feeding water is arranged on the oil pipe at the upper part of the hydraulic sealing rubber bowl. The water-saving diameter-changeable separator for well washing has the effects of saving water and preventing an oil layer at the bottom of the well from being polluted.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of oil exploitation, in particular to a well washing water-saving and diameter-changeable separator. BACKGROUND

[0002] In the exploitation of oil fields, a large amount of waxy components are contained in crude oil, which are dissolved under the conditions of high temperature and high pressure in the formation. As the crude oil is exploited to the ground, the temperature and pressure decrease, and most of the oil wells will appear wax precipitation at a depth of about 900 meters, mainly manifested as the waxy components gradually precipitating and coagulating on the oil pipe. The wax precipitation will cause the inner wall of the oil pipe to be gradually covered with wax, reducing the inner diameter of the oil pipe and ultimately affecting the production capacity of the oil well. In severe cases, the oil well may even stop production.

[0003] The casing, as the main structure of the oil well, is installed outside the oil pipe and used as external support for the oil pipe. There is an annular space between the casing and the oil pipe, which can be used for water injection to wash away the coagulated wax in the oil pipe. The current well washing method is backwashing, that is, water is injected from the ground to the annular space, and then enters the oil pipe from the bottom of the annular space under high pressure. The well depth is generally 2000 meters, but the wax precipitation occurs at a depth of about 900 meters. In the past, the entire oil well needed to be washed to remove the wax, which not only caused a large amount of water waste, but also caused some water to enter the oil layer and pollute the oil layer. CONTENT OF THE UTILITY MODEL

[0004] We expect to reduce the water consumption of well washing while being able to adjust the position of the oil pipe in the casing, and the application provides a well washing water-saving and diameter-changeable separator.

[0005] The application provides a well washing water-saving and diameter-changeable separator, which adopts the following technical scheme:

[0006] A well washing water-saving and diameter-changeable separator, comprising:

[0007] An elastic hydraulic sealing rubber bowl is located in the casing and is sleeved on the oil pipe in the casing and is supported by the top outer edge of the coupling for connecting two adjacent oil pipes;

[0008] A sealing clamping ring is covered in the hydraulic sealing rubber bowl;

[0009] A translatable sealing ring is located on the sealing clamping ring and covered in the hydraulic sealing rubber bowl, and the outer diameter of the translatable sealing ring is greater than the outer diameter of the sealing clamping ring;

[0010] A side wall valve for water inlet is arranged on the oil pipe at the upper part of the hydraulic sealing rubber bowl.

[0011] By adopting the technical scheme, the casing is arranged outside the oil pipe to support the well wall and prevent the well wall from collapsing during oil exploitation.

[0012] The wash pipe water-saving and diameter-changeable separator is arranged on the outer edge of the top of the coupling at the well depth of about 900m, which can center the oil pipe in the casing. During the oil well production, the oil pipe will vibrate or swing with the movement of the oil pumping equipment. The interval between the oil pipe and the casing can effectively reduce the friction and wear between the oil pipe and the casing.

[0013] On the other hand, when water is injected from the ground into the space between the oil pipe and the casing, the water enters the space formed by the top surface of the translatable sealing ring and the side wall of one end of the hydraulic sealing rubber bowl, and props open the end of the hydraulic sealing rubber bowl to block the gap between the outer wall of the hydraulic sealing rubber bowl and the inner wall of the casing. The water also enters the space formed by the inner ring hole of the translatable sealing ring and the side wall of the other end of the hydraulic sealing rubber bowl, and props open the other end of the hydraulic sealing rubber bowl to block the gap between the outer wall of the hydraulic sealing rubber bowl and the outer wall of the oil pipe. Further, the water flow into the lower part of the separator is reduced, and the water enters the oil pipe from the side wall valve on the oil pipe above the hydraulic sealing rubber bowl and cleans the wax on the inner wall of the oil pipe. The water consumption during the wax cleaning is greatly reduced, and the pollution of the oil layer caused by the water entering the oil layer is also avoided. In addition, the translatable sealing ring can move radially relative to the sealing clamp ring, and the separator can be adjusted according to the different positions of the oil pipe in the casing. Moreover, the outer diameter of the translatable sealing ring can be replaced and adjusted according to the interval between the oil pipe and the casing. When the interval is large, the outer diameter of the translatable sealing ring is large, and when the interval is small, the outer diameter of the translatable sealing ring is small.

[0014] Optionally, the sealing clamp ring is fixedly connected with an elastic rubber ring pad, and the translatable sealing ring is located on the elastic rubber ring pad.

[0015] By adopting the technical scheme, the elastic rubber ring pad is arranged between the sealing clamp ring and the translatable sealing ring to form a seal, so that the injected water can act on both ends of the hydraulic sealing rubber bowl, and both ends of the hydraulic sealing rubber bowl can be blocked from one side of the casing and the oil pipe.

[0016] Optionally, a ring of upper sealing wedge heads is formed at the end of the hydraulic sealing rubber bowl close to the translatable sealing ring, and a ring of lower sealing wedge heads is formed at the end of the hydraulic sealing rubber bowl close to the sealing clamp ring.

[0017] By adopting the technical scheme, when no water is injected, the hydraulic sealing rubber bowl is based on its elasticity, the upper sealing wedge head is inclined to the side of the oil pipe and the lower part elastically contacts the side wall of the translatable sealing ring, and the lower sealing wedge head is inclined to the side of the casing and the lower part elastically contacts the sealing clamp ring. After water injection, under the action of water pressure, the hydraulic sealing rubber bowl expands, the upper sealing wedge head rotates to the side of the casing, and the wedge-shaped part contacts the inner wall of the casing to form a better seal on this side. The lower sealing wedge head rotates to the side of the oil pipe, and the wedge-shaped part contacts the outer wall of the oil pipe to form a better seal on this side.

[0018] Optionally, the translatable sealing ring is slidingly arranged on the sealing clamp ring.

[0019] By adopting the technical scheme, the translatable sealing ring and the sealing clamp ring are slidingly arranged, and since not every oil pipe is located in the center of the casing, the sliding arrangement of the translatable sealing ring can be suitable for the case that the oil pipe is not completely centered. Meanwhile, the translatable sealing ring and the translatable sealing ring are not fixedly arranged, and the size of the translatable sealing ring can be replaced according to the diameter of the casing.

[0020] Optionally, the two oil pipes are respectively inserted from the two ends of the coupling and are respectively threadedly connected with the two ends of the coupling.

[0021] By adopting the technical scheme, when the two oil pipes need to be connected, one oil pipe is threadedly connected with one end of the coupling, and the other oil pipe is threadedly connected with the other end of the coupling, which is very convenient and fast.

[0022] Optionally, the side wall valve is arranged on the coupling at the upper part of the hydraulic sealing rubber bowl, the side wall valve comprises a spring and a ball body fixedly connected with one end of the spring, the oil pipe is provided with a water inlet hole opposite to the ball body, the other end of the spring is fixed on the hole wall of the water inlet hole, a through hole opposite to the water inlet hole is formed in the coupling, and the diameter of the ball body is greater than the hole diameter of the through hole and smaller than the hole diameter of the water inlet hole.

[0023] By adopting the technical scheme, when no water is injected, the ball body blocks the through hole in the coupling under the action of the spring pressure, so as to avoid the oil in the oil pipe flowing out from the water inlet hole and entering the interval between the oil pipe and the casing. When water is injected, the ball body overcomes the spring pressure under the action of water pressure, the through hole is opened, and then the water enters the oil pipe through the through hole and the water inlet hole and washes the wax on the side wall of the oil pipe.

[0024] Optionally, the sealing clamp ring and the translatable sealing ring are made of metal.

[0025] By adopting the technical scheme, the sealing clamp ring and the translatable sealing ring are made of metal, which has good hardness and can better support the oil pipe.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. Since the waxing position of the oil pipe is about 900 meters underground, the present application sets a partition through the partitioner, so that water cannot enter the deeper underground, but can enter the oil pipe at the waxing position with a relatively shallow depth and clean the wax in the oil pipe. The water does not need to run to the deeper underground, avoiding the waste of water source, and avoiding the pollution of the oil layer by water.

[0028] 2. The present application sets a translatable sealing ring, which can slide relative to the sealing clamping ring, and can be automatically adjusted according to the position of the oil pipe in the casing, thereby providing good support for the oil pipe. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a half-partial perspective view of a well washing water-saving and diameter-changeable partitioner embodying the present application;

[0030] Figure 2 is a cross-sectional view of a well washing water-saving and diameter-changeable partitioner embodying the present application;

[0031] Figure 3 is an enlarged view of A of Figure 2 .

[0032] BRIEF DESCRIPTION OF DRAWINGS

[0033] 1. Casing; 2. Oil pipe; 201. Water inlet hole; 3. Coupling; 301. Through hole; 4. Side wall valve; 401. Spring; 402. Ball;

[0034] 10. Hydraulic sealing glue bowl; 11. Upper sealing wedge head; 12. Lower sealing wedge head; 20. Sealing clamping ring; 30. Translatable sealing ring; 40. Elastic rubber ring pad. DETAILED DESCRIPTION

[0035] The present application will be further described below in conjunction with the accompanying drawings. Figures 1-3 The present application will be further described below in conjunction with the accompanying drawings.

[0036] The present application discloses a well washing water-saving and diameter-changeable partitioner.

[0037] Please refer to Figure 1 , Figure 2 and Figure 3 , a self-washing well water-saving and diameter-changeable partitioner is used to intercept the water in the interval between the injection pipe 2 and the casing 1 at the waxing position of the oil pipe, i.e. about 900 meters deep, to reduce the injection of water into the deeper non-waxing position.

[0038] A plurality of oil pipes 2 are arranged in the casing 1 in intervals, and an annular space is formed between the casing 1 and the oil pipes 2 for water injection. The plurality of oil pipes 2 are connected in sequence along the length direction of the casing 1, and two adjacent oil pipes 2 are connected by a coupling 3. The coupling 3 has an internal thread, and the end of the oil pipe 2 is provided with an external thread, and the two oil pipes 2 are inserted into the coupling 3 from both ends and are threadedly connected with the coupling 3.

[0039] A well flushing water-saving and diameter-changeable separator is arranged on the top outer edge of the coupling 3 connecting the two oil pipes 2. The well flushing water-saving and diameter-changeable separator comprises an elastic hydraulic sealing rubber bowl 10, which is centrally perforated and sleeved on the oil pipe 2 and is supported by the coupling 3.

[0040] The hydraulic sealing rubber bowl 10 is in the shape of a bowl as a whole, and a lower sealing wedge head 12 is formed at the central perforation, and a lower sealing wedge head 12 is connected to a segment of an arc-shaped body which is close to vertical, and the arc-shaped body is sleeved on the oil pipe 2, and a sealing clamping ring 20 is arranged on the inner side of the arc-shaped body. When there is no water injection, the lower sealing wedge head 12 is inclined towards the side of the casing 1. The sealing clamping ring 20 is in the shape of an L-shaped ring body and is sleeved on the oil pipe 2, and the horizontal edge of the sealing clamping ring 20 is towards the oil pipe 2.

[0041] The top of the vertical part of the sealing clamping ring 20 is fixed with an elastic rubber ring pad 40, and an elastic sealing ring 30 is slidably arranged on the elastic rubber ring pad 40, and the elastic sealing ring 30 is covered by a bowl body at the lower part of the upper sealing wedge head 11. A circle of upper sealing wedge heads 11 is formed at the bowl opening of the hydraulic sealing rubber bowl 10, and the upper sealing wedge head 11 is higher than the elastic sealing ring 30, and the position of the upper sealing wedge head 11 is higher than that of the lower sealing wedge head 12. When there is no water injection, the upper sealing wedge head 11 is curved towards the oil pipe 2.

[0042] The outer diameter of the elastic sealing ring 30 is greater than that of the vertical part of the sealing clamping ring 20, and the inner diameter of the elastic sealing ring 30 is greater than or equal to that of the vertical part. The sealing clamping ring 20 and the elastic sealing ring 30 are made of metal material and have a certain hardness so as to better support the oil pipe 2.

[0043] When water is injected from the ground into the space between the oil pipe 2 and the casing 1, the water enters the space formed by the top surface of the elastic sealing ring 30 and the side wall of the upper sealing wedge head 11, and the upper sealing wedge head 11 is opened to block the gap between the outer wall of the hydraulic sealing rubber bowl 10 and the inner wall of the casing 1.

[0044] At the same time, the water enters the space formed by the top surface of the sealing clamping ring 20 and the side wall of the lower sealing wedge head 12 from the inner ring hole of the elastic sealing ring 30, and the lower sealing wedge head 12 is opened to block the gap between the outer wall of the hydraulic sealing rubber bowl 10 and the outer wall of the oil pipe 2.

[0045] The side wall valve 4 is arranged on the coupling 3 of the upper part of the hydraulic sealant bowl 10, and the side wall valve 4 comprises a spring 401 and a ball 402 fixedly connected with one end of the spring 401. The water inlet hole 201 is arranged opposite to the ball 402 on the oil pipe 2, the other end of the spring 401 is fixed on the hole wall of the water inlet hole 201, the through hole 301 is arranged on the coupling 3 and is opposite to the water inlet hole 201, the diameter of the ball 402 is greater than the diameter of the through hole 301 and is less than the diameter of the water inlet hole 201.

[0046] The side wall valve 4 is arranged on the coupling 3 of the upper part of the hydraulic sealant bowl 10, and the side wall valve 4 comprises a spring 401 and a ball 402 fixedly connected with one end of the spring 401. The water inlet hole 201 is arranged opposite to the ball 402 on the oil pipe 2, the other end of the spring 401 is fixed on the hole wall of the water inlet hole 201, the through hole 301 is arranged on the coupling 3 and is opposite to the water inlet hole 201, the diameter of the ball 402 is greater than the diameter of the through hole 301 and is less than the diameter of the water inlet hole 201.

[0047] When the water is not injected, the ball 402 blocks the through hole 301 on the coupling 3 under the action of the spring 401, so that the oil in the oil pipe 2 does not flow out from the water inlet hole 201 into the interval between the oil pipe 2 and the casing 1. When the water is injected, the ball 402 overcomes the pressure of the spring 401 under the action of the water pressure, the through hole 301 is opened, and then the water enters the oil pipe 2 through the through hole 301 and the water inlet hole 201 and cleans the wax on the side wall of the oil pipe 2.

[0048] The above are the preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, so: any equivalent changes made on the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A water-saving wash well changeable diameter separator, characterized in that: The utility model relates to a hydraulic sealing sleeve for oil pipe, comprising: a flexible hydraulic sealing sleeve (10) is located in the sleeve (1) and is sleeved on the oil pipe (2) in the sleeve (1), and is supported by the top outer edge of the coupling (3) for connecting two adjacent oil pipes (2); a sealing clamping ring (20) is wrapped in the hydraulic sealing sleeve (10); a translatable sealing ring (30) is located on the sealing clamping ring (20) and wrapped in the hydraulic sealing sleeve (10), and the outer diameter of the translatable sealing ring (30) is larger than the outer diameter of the sealing clamping ring (20); a side wall valve (4) for water inlet is arranged on the oil pipe (2) at the upper part of the hydraulic sealing sleeve (10).

2. The water-saving washdown convertible-diameter straddle produced in accordance with claim 1, characterized by the fact that: The sealing clamping ring (20) is fixedly connected with an elastic rubber ring pad (40), and the translatable sealing ring (30) is located on the elastic rubber ring pad (40).

3. The water-saving washdown convertible-diameter straddle produced in accordance with claim 1, characterized by the fact that: An upper sealing wedge head (11) is formed at the end of the hydraulic sealing sleeve (10) close to the translatable sealing ring (30), and a lower sealing wedge head (12) is formed at the end of the hydraulic sealing sleeve (10) close to the sealing clamping ring (20).

4. The water-saving washdown convertible-flow-string isolator of any one of claims 1-3, wherein: The translatable sealing ring (30) is slidably arranged on the sealing clamping ring (20).

5. The water-saving washdown flow sleeve of claim 1, wherein: The two oil pipes (2) are respectively inserted into the coupling (3) from both ends of the coupling (3) and are respectively threadedly connected with both ends of the coupling (3).

6. The water-saving washdown flow sleeve of claim 1, wherein: The side wall valve (4) is arranged on the coupling (3) at the upper part of the hydraulic sealing sleeve (10), the side wall valve (4) comprises a spring (401) and a ball (402) fixedly connected with one end of the spring (401), the oil pipe (2) is provided with a water inlet hole (201) opposite to the ball (402), the other end of the spring (401) is fixed on the hole wall of the water inlet hole (201), a through hole (301) opposite to the water inlet hole (201) is formed in the coupling (3), the diameter of the ball (402) is larger than the hole diameter of the through hole (301) and smaller than the hole diameter of the water inlet hole (201).

7. The water-saving washdown flow sleeve of claim 1, wherein: The sealing clamping ring (20) and the translatable sealing ring (30) are made of metal.

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