A hot washing valve for a hollow rod well of a pumping unit

Abstract

The present invention discloses a hot washing valve for a hollow rod well of a pumping unit, specifically relating to the technical field of hot washing valves for hollow rods of pumping units. The technical solution is as follows: It includes a connecting device and a long rod. The connecting devices are provided at both ends of the long rod. It also includes a flow stopping device arranged on the inner wall of the long rod; and a drainage device arranged on the inner wall of the long rod. The flow stopping device includes a sliding groove and a spherical ball. The sliding groove is opened at the middle end of the inner wall of the long rod, and the spherical ball is inserted at the bottom end of the inner wall of the sliding groove. The drainage device includes a first water inlet groove and a second water inlet groove. The first water inlet groove is opened at the top end of the inner wall of the long rod, and the second water inlet groove is opened at the bottom end of the inner wall of the long rod. The bottom end of the first water inlet groove is connected to the second water inlet groove. The connecting device includes a first female coupling joint and a second female coupling joint. The first female coupling joint is provided at the top of the long rod. The beneficial effect of the present invention is that by using the present invention, not only will hot water pollution be avoided, but also the well washing time and well washing efficiency will be improved.

Description

Technical Field

[0001] The present invention relates to the field of hot washing valves for hollow rods of pumping units, and particularly to a hot washing valve for hollow rod wells of pumping units. Background Art

[0002] A pumping unit is a machine for oil extraction, commonly known as a nodding donkey. It forces oil to flow out of the well by applying pressure. When the pumping unit moves upward during the upstroke, the tubing elastically contracts and moves upward, driving the mechanical plugging removal oil extractor to move upward and impact the sliding sleeve to generate vibration. At the same time, the positive check valve closes, and the variable diameter piston assembly seals the oil. When the pumping unit moves downward during the downstroke, the tubing elastically elongates and moves downward, driving the mechanical plugging removal oil extractor to move downward and impact the sliding sleeve to generate vibration. At the same time, the reverse check valve partially closes, and the variable diameter piston assembly still seals the oil casing annulus, forming a high-pressure area below the reverse check valve. This movement also generates a reverse impact force on the oil flow channel in the formation. However, after the pumping unit has been operating for a long time, oil will stick to the inner wall of the tubing, and more and more oil wax will form. Over time, the pumping rod will not be able to pump, and it will become blocked. To solve this problem, all pumping unit wells need to be washed, and hot water is used to melt the stuck oil. Generally, a well washing truck is used, such as washing every 30, 5, 20, or 10 days, with different cycles depending on the well conditions.

[0003] The existing technology has the following deficiencies: The existing method for cleaning oil wax is to directly inject water from the casing using a hot water high-pressure truck and then pump out the melted water and oil inside with a pump. The wells that are cleaned can continue production. However, the existing drawback is that after the water goes down and enters the oil layer, it cannot ensure that all the water is pumped out. Because of the different acid-base properties, it is easy to block the oil in the oil layer, making it difficult for the oil to flow out. This is hot water pollution, and afterwards, the amount of oil pumped out will become less and less, and the oil pollution is large, and the well washing time is relatively long.

[0004] Therefore, it is very necessary to invent a hot washing valve for hollow rod wells of pumping units. Summary of the Invention

[0005] For this purpose, the present invention provides a hot washing valve for hollow rod wells of pumping units. The hollow pumping rod is connected to the long rod through a connecting device. After connection, water flows into the sliding groove through a drainage device, and then the water flows out from the water outlet hole. When the water flows into the sliding groove, the water will push the spherical ball into the bottom inner wall of the flow hole 1, thereby preventing water, oil, and gas from entering the flow hole 1, so as to solve the problem that after the water goes down and enters the oil layer, it cannot ensure that all the water is pumped out.

[0006] To achieve the above object, the present invention provides the following technical solution: A hot washing valve for hollow rod wells of pumping units, including a connecting device and a long rod. The connecting devices are provided at both ends of the long rod, and a flow stopping device is further provided on the inner wall of the long rod; and

[0007] The drainage device is arranged on the inner wall of the long rod;

[0008] The flow-stopping device includes a sliding groove and a spherical ball. The sliding groove is opened at the middle end of the inner wall of the long rod, and the spherical ball is inserted at the bottom end of the inner wall of the sliding groove;

[0009] The drainage device includes a first water inlet groove and a second water inlet groove. The first water inlet groove is opened at the top end of the inner wall of the long rod, the second water inlet groove is opened at the bottom end of the inner wall of the long rod, and the bottom end of the first water inlet groove is connected to the second water inlet groove.

[0010] Preferably, the connecting device includes a first female buckle joint and a second female buckle joint. The first female buckle joint is arranged at the top of the long rod.

[0011] Preferably, the second female buckle joint is arranged at the bottom of the long rod.

[0012] Preferably, a water outlet hole is opened on the inner wall of the long rod. One end of the water outlet hole is connected to the sliding groove, and there is at least one group of the water outlet holes.

[0013] Preferably, a first flow hole is opened on the inner wall at the top end of the long rod. A first one-way valve is installed on the inner wall of the first flow hole, and the first flow hole is located inside the first female buckle joint.

[0014] Preferably, the top end of the sliding groove is connected to the first flow hole.

[0015] Preferably, the first water inlet groove is located on one side of the first flow hole. There is at least one group of the first water inlet grooves, and the first water inlet grooves are located inside the first female buckle joint.

[0016] Preferably, a second flow hole is opened on the inner wall at the bottom end of the long rod. A second one-way valve is installed on the inner wall at the top end of the second flow hole, and a third one-way valve is installed on the inner wall at the top end of the second flow hole. The third one-way valve is located below the second one-way valve. One end of the second water inlet groove is connected to the second flow hole, and the second water inlet groove is located between the second one-way valve and the third one-way valve.

[0017] Preferably, the inner wall at the top end of the second flow hole is connected to the spherical ball, and the second flow hole is located inside the second female buckle joint.

[0018] Preferably, a nylon wax scraper is connected to the outside of the bottom end of the long rod.

[0019] The beneficial effects of the present invention are:

[0020] When using the present invention, first connect the hollow sucker rod and the long rod through the female coupling joint 1, and place the long rod inside the inner wall of the tubing. When it is necessary to clean the paraffin, the hot water high-pressure vehicle transports water into the hollow sucker rod. Then, the hollow sucker rod will let the water flow into the long rod. After flowing in, the water will flow into the water inlet groove 1 through the check valve 1. After flowing in, the water will flow into the water inlet groove 2. Then, the water inlet groove 2 will let the water flow into the flow hole 2. After flowing in, the water will flow into the sliding groove through the check valve 2 and the check valve 3. When the water flows into the sliding groove, the water will push the spherical ball into the top of the sliding groove and plug it into the inner wall at the bottom end of the flow hole 1, so as to prevent oil, water and gas from flowing into the flow hole 1. When the water flows into the sliding groove, the water will flow into the water outlet hole, and then the water outlet hole will drain the water out, so as to drain the water into the tubing. When the paraffin is melted, stop injecting water. After stopping the injection, the spherical ball will drop and plug it into the inner wall at the top end of the flow hole 2. Then, pump the melted paraffin, water and gas into the flow hole 1. After flowing in, it will flow into the hollow sucker rod through the check valve 1, so as to drain the melted paraffin, water and gas out, and complete the paraffin cleaning work. By using the present invention, not only can hot water pollution be avoided, but also the well washing time and well washing efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The front view of the three-dimensional structure provided by the present invention;

[0022] Figure 2 The front view of the internal structure provided by the present invention;

[0023] Figure 3 The enlarged view of the A area of the front view of the internal structure provided by the present invention;

[0024] Figure 4 The enlarged view of the B area of the front view of the internal structure provided by the present invention;

[0025] Figure 5 The front view of the structure provided by the present invention;

[0026] Figure 6 The top view of the structure provided by the present invention.

[0027] In the figure: connecting device 1, female coupling joint 11, female coupling joint 12, long rod 2, sliding groove 21, water outlet hole 22, flow hole 1 23, check valve 1 231, water inlet groove 1 24, water inlet groove 2 25, spherical ball 26, flow hole 2 27, check valve 2 271, check valve 3 272, nylon paraffin scraper 3. DETAILED DESCRIPTION OF THE INVENTION

[0028] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0029] Referring to the attached Figures 1-6 , a hot washing valve for a hollow rod well of a pumping unit provided by the present invention includes a connecting device 1 and a long rod 2. The connecting device 1 is provided at both ends of the long rod 2, and further includes a flow stopping device provided on the inner wall of the long rod 2; and

[0030] a drainage device provided on the inner wall of the long rod 2;

[0031] Further, the flow stopping device includes a sliding groove 21 and a spherical ball 26. The sliding groove 21 is opened at the middle end of the inner wall of the long rod 2, and the spherical ball 26 is inserted at the bottom end of the inner wall of the sliding groove 21. Specifically, the spherical ball 26 has the function of sliding in the sliding groove 21.

[0032] Further, the drainage device includes a first water inlet groove 24 and a second water inlet groove 25. The first water inlet groove 24 is opened at the top end of the inner wall of the long rod 2, and the second water inlet groove 25 is opened at the bottom end of the inner wall of the long rod 2. The bottom end of the first water inlet groove 24 is connected to the second water inlet groove 25. Specifically, the first water inlet groove 24 has the function of circulating water, the first water inlet groove 24 has the function of flowing water into the second water inlet groove 25, and the second water inlet groove 25 has the function of circulating water.

[0033] Further, the connecting device 1 includes a first female threaded joint 11 and a second female threaded joint 12. The first female threaded joint 11 is provided at the top of the long rod 2. Specifically, the first female threaded joint 11 has the function of connecting the long rod 2 with the hollow pumping rod.

[0034] Further, the second female threaded joint 12 is provided at the bottom of the long rod 2.

[0035] Further, a water outlet hole 22 is opened on the inner wall of the long rod 2. One end of the water outlet hole 22 is connected to the sliding groove 21. The water outlet hole 22 is at least one group. Specifically, the sliding groove 21 has the function of flowing water into the water outlet hole 22, and the water outlet hole 22 has the function of discharging water, so as to achieve the function of discharging water into the oil pipe. The water outlet hole 22 is preferably three groups.

[0036] Further, a first flow hole 23 is opened on the inner wall at the top end of the long rod 2. A first one-way valve 231 is installed on the inner wall of the first flow hole 23. The first flow hole 23 is located inside the first female threaded joint 11. Specifically, the first flow hole 23 has the function of circulating water, oil and gas. The one-way valve is that the fluid can only flow along the water inlet, and the medium at the water outlet cannot flow back, commonly known as the one-way valve. The first one-way valve 231 has the function of preventing water from flowing from the first flow hole 23 into the sliding groove 21.

[0037] Further, a first flow hole 23 is connected to the top end of the sliding groove 21.

[0038] Further, a first water inlet groove 24 is located on one side of the first flow hole 23. The first water inlet groove 24 is at least one group, and the first water inlet groove 24 is located inside the first female buckle joint 11. Specifically, the first water inlet groove 24 is preferably two groups.

[0039] Further, a second flow hole 27 is formed in the inner wall of the bottom end of the long rod 2. A second one-way valve 271 is installed on the inner wall of the top end of the second flow hole 27, and a third one-way valve 272 is installed on the inner wall of the top end of the second flow hole 27. The third one-way valve 272 is located below the second one-way valve 271. One end of the second water inlet groove 25 is connected to the second flow hole 27, and the second water inlet groove 25 is located between the second one-way valve 271 and the third one-way valve 272. Specifically, the second one-way valve 271 has the function of allowing the water flowing into the second flow hole 27 to flow into the sliding groove 21, and the third one-way valve 272 has the function of preventing the water from flowing down from the second flow hole 27.

[0040] Further, a spherical ball 26 is connected to the inner wall of the top end of the second flow hole 27, and the second flow hole 27 is located inside the second female buckle joint 12.

[0041] Further, a nylon wax scraper 3 is connected to the outside of the bottom end of the long rod 2. Specifically, the nylon wax scraper 3 has the function of cleaning oil wax.

[0042] The usage process of the present invention is as follows: When using the present invention, first connect the hollow sucker rod to the long rod 2 through the female buckle joint 11, and place the long rod 2 inside the inner wall of the oil pipe. When it is necessary to clean the oil wax, the water is transported into the hollow sucker rod through a hot water high-pressure vehicle. Then, the water in the hollow sucker rod will flow into the long rod 2. After flowing in, the water will flow into the water inlet groove 24 through the one-way valve 231. After flowing in, the water will flow into the water inlet groove 25. Then, the water inlet groove 25 will flow the water into the flow hole 27. After flowing in, the water will flow into the sliding groove 21 through the one-way valve 271 and the one-way valve 272. When the water flows into the sliding groove 21, the water will push the ball 26 into the top of the sliding groove 21 and plug it into the inner wall of the bottom end of the flow hole 23, so as to prevent oil, water, and gas from flowing into the flow hole 23. When the water flows into the sliding groove 21, the water will flow into the water outlet hole 22, and then the water outlet hole 22 will drain the water out, so as to drain the water into the oil pipe. When the oil wax is melted, stop injecting water. After stopping the injection, the ball 26 will drop and plug it into the inner wall of the top end of the flow hole 27. Then, pump the melted oil wax, water, and gas into the flow hole 23. After flowing in, it will flow into the hollow sucker rod through the one-way valve 231, so as to drain the melted oil wax, water, and gas out, and complete the oil wax cleaning work. When draining the melted oil wax, water, and gas out, since the ball 26 is plugged into the inner wall of the top end of the flow hole 27, it will prevent the melted oil wax, water, and gas from flowing into the flow hole 27 and prevent the external fluid from flowing into the sliding groove 21 through the one-way valve 271 and the one-way valve 272.

[0043] The above are only the preferred embodiments of the present invention. Any person skilled in the art may modify the present invention by using the technical solutions described above or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent replacement made according to the technical solutions of the present invention falls within the scope of protection required by the present invention.

Claims

1. A hot washing valve for a hollow rod well of a pumping unit, comprising a connecting device (1) and a long rod (2), wherein the connecting device (1) is provided at both ends of the long rod (2), and is characterized in that, It also includes a flow-stop device arranged on the inner wall of the long rod (2); and a drainage device arranged on the inner wall of the long rod (2); The flow-stop device includes a sliding groove (21) and a spherical ball (26). The sliding groove (21) is opened at the middle end of the inner wall of the long rod (2), and the spherical ball (26) is inserted at the bottom end of the inner wall of the sliding groove (21); The drainage device includes a first water inlet groove (24) and a second water inlet groove (25). The first water inlet groove (24) is opened at the top end of the inner wall of the long rod (2), the second water inlet groove (25) is opened at the bottom end of the inner wall of the long rod (2), and the bottom end of the first water inlet groove (24) is connected to the second water inlet groove (25); The connecting device (1) includes a female buckle joint one (11) and a female buckle joint two (12). The female buckle joint one (11) is arranged at the top of the long rod (2); the female buckle joint two (12) is arranged at the bottom of the long rod (2); A water outlet hole (22) is opened on the inner wall of the long rod (2). One end of the water outlet hole (22) is connected to the sliding groove (21), and the water outlet hole (22) is at least in one group; a first flow hole (23) is opened on the inner wall at the top end of the long rod (2), a first one-way valve (231) is installed on the inner wall of the first flow hole (23), and the first flow hole (23) is located inside the female buckle joint one (11); the top end of the sliding groove (21) is connected to the first flow hole (23); the first water inlet groove (24) is located on one side of the first flow hole (23), and the first water inlet groove (24) is at least in one group and is located inside the female buckle joint one (11); a second flow hole (27) is opened on the inner wall at the bottom end of the long rod (2), a second one-way valve (271) is installed on the inner wall at the top end of the second flow hole (27), a third one-way valve (272) is installed on the inner wall at the top end of the second flow hole (27), and the third one-way valve (272) is located below the second one-way valve (271). One end of the second water inlet groove (25) is connected to the second flow hole (27), and the second water inlet groove (25) is located between the second one-way valve (271) and the third one-way valve (272); the inner wall at the top end of the second flow hole (27) is connected to the spherical ball (26), and the second flow hole (27) is located inside the female buckle joint two (12); a nylon wax scraper (3) is connected to the outside at the bottom end of the long rod (2); The first one-way valve (231) has the function of preventing water from flowing from the first flow hole (23) into the sliding groove (21); the second one-way valve (271) has the function of flowing the water flowing into the second flow hole (27) into the sliding groove (21); the third one-way valve (272) has the function of preventing water from flowing down from the second flow hole (27).

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