An automatic unblocking device for oil well casing gas pipelines in winter

Abstract

This utility model provides an automatic unblocking device for oil well casing gas pipelines in winter, comprising: an automatic conduction assembly, which includes a conduction pipe, an elastic element, and a sealing element. The conduction pipe has a first port and a second port. The casing gas pipeline is connected to the conduction pipe through the first port. The sealing element is movably disposed in the conduction pipe, and the elastic element can apply elastic force to the sealing element to close the first port. A methanol supply assembly is also provided, which is connected to the conduction pipe through the second port. This utility model's automatic unblocking device for oil well casing gas pipelines in winter can promptly unblock blockages and save methanol.

Description

Technical Field

[0001] This utility model relates to the technical field of oil well casing gas recovery equipment, and in particular to an automatic unblocking device for oil well casing gas pipelines in winter. Background Technology

[0002] During oil well production, natural gas is often produced alongside it. This natural gas is commonly referred to as associated gas. In the production phase of an oil well, crude oil and natural gas are usually extracted together. Due to the different physical states of crude oil and natural gas, they need to be separated at the wellhead. After separation, the crude oil and natural gas undergo further processing and transportation, respectively. In cold winters, when natural gas is recovered, the sudden drop in temperature often causes the moisture in it to condense into ice, which can freeze inside pipelines, leading to pipeline blockage.

[0003] If freezing and blockage occur and are not addressed promptly, they can severely impact normal oil well production and the safe transport of natural gas. When freezing and blockage are detected early and the situation is not severe, injecting methanol is a quick and effective method for unblocking the blockage. The addition of methanol lowers the freezing point of water, causing the ice in the pipeline to melt rapidly, thereby restoring the normal flow of natural gas.

[0004] However, if inspections are not conducted in a timely manner, the freezing problem can worsen at night when temperatures drop further, making it difficult to resolve quickly even with the addition of methanol. In such cases, more complex measures are usually required, such as heating the low points of the pipeline with steam or hot water. While this method can melt the ice inside the pipeline, it is time-consuming, labor-intensive, and requires a significant amount of energy and manpower.

[0005] Therefore, timely unblocking of pipelines is an urgent problem to be solved. Existing technology, as disclosed in publication number CN210135454U, provides a methanol refueling device for natural gas pipelines, including: a jet pump, a first liquid supply pipeline, a methanol evaporator, a second liquid supply pipeline, and a methanol storage tank. The jet pump is connected to the natural gas pipeline; one end of the first liquid supply pipeline is connected to the jet pump, and the other end is connected to the upper part of the methanol evaporator; one end of the second liquid supply pipeline is connected to the lower part of the methanol evaporator, and the other end is connected to the lower part of the methanol storage tank. In this prior art, liquid methanol is processed into gaseous methanol through the evaporator, and continuous refueling is achieved through the jet pump.

[0006] While the aforementioned existing technologies can achieve timely methanol injection to unblock the blockage, the methanol is always automatically discharged, resulting in extremely high methanol consumption and significant waste. Utility Model Content

[0007] Based on the above situation, the main purpose of this utility model is to provide an automatic unblocking device for oil well casing gas pipelines in winter, so as to solve the problem of excessive methanol consumption caused by the continuous introduction of methanol into the gas pipeline in the existing technology.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows: An automatic unblocking device for oil well casing gas pipelines in winter includes: An automatic conduction assembly includes a conduction tube, an elastic element, and a sealing element. The conduction tube is provided with a first port and a second port. The sleeve gas line is connected to the conduction tube through the first port. The sealing element is movably disposed in the conduction tube. The elastic element can apply elastic force to the sealing element to close the first port. A methanol supply component, wherein the methanol supply component is connected to the conductive pipe through the second port.

[0009] Preferably, the closure element includes a closure rod and a closure ring, the inner circumference of the closure ring is fixed to the closure rod, and the elastic element is capable of applying elastic force to the closure rod; The automatic conduction assembly also includes an adjusting cap, which is threadedly connected to the conduction tube and connected to the elastic element.

[0010] Preferably, the elastic element is a spring, which is sleeved on the outside of the closing rod. One end of the spring is fixed to the closing rod, and the other end of the spring can be connected to the adjusting cap.

[0011] Preferably, the closure further includes a pressure ring and a pressure ring buckle, both of which are fixed to the outer periphery of the closure rod. The pressure ring abuts against the closure ring, and the pressure ring buckle is located on the side of the pressure ring away from the closure ring. The pressure ring buckle is fixed to the end of the spring.

[0012] Preferably, the closing rod has a guide groove, a guide rod passes through the guide groove, a connecting body is fixed to the end of the guide rod, the end of the connecting body away from the guide rod can abut against the adjusting cap, and one end of the spring abuts against the connecting body.

[0013] Preferably, an annular groove is formed on the periphery of the connector, and a sealing ring is fixedly connected in the annular groove, with the outer periphery of the sealing ring abutting against the inner side of the conductive tube.

[0014] Preferably, the guide tube is externally threaded with a locking nut, which can abut against the adjusting cap.

[0015] Preferably, it also includes a pressure regulating component, which includes a pressure regulating pipe, one end of which can be connected to the first pipe port, and the other end of which is connected to the sleeve gas pipeline; An air nozzle is provided in the middle of the pressure regulating pipe, and the air nozzle is connected to the pressure regulating pipe.

[0016] Preferably, a casing gas valve is provided between the pressure regulating component and the casing gas pipeline.

[0017] Preferably, the methanol supply assembly includes a three-way pipe, which is composed of a first pipe body, a second pipe body, and a third pipe body. The first pipe body and the second pipe body can be connected. The second pipe body is connected to a methanol tank. The end of the third pipe body is equipped with a vent valve.

[0018] The beneficial effects of this invention are as follows: After freezing occurs, the pressure inside the casing gas line increases, forcing the sealing element away from the first pipe opening, thus opening the first pipe opening and allowing methanol to flow into the casing gas line, achieving automatic unblocking of the casing gas line. The automatic unblocking device for casing gas lines in winter provided by this application relies on the elastic element to apply a certain pressure to the sealing element, blocking the flow of methanol into the casing gas line, thereby saving methanol usage without freezing.

[0019] Other beneficial effects of this utility model will be explained in detail through the introduction of specific technical features and technical solutions in the specific embodiments. Those skilled in the art should be able to understand the beneficial technical effects brought about by the technical features and technical solutions through the introduction of these technical features and technical solutions. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of an automatic unblocking device for oil well casing gas pipelines in winter according to the present invention.

[0021] Figure 2 This is a schematic diagram of the automatic unblocking component of an automatic unblocking device for oil well casing gas pipelines in winter according to this utility model.

[0022] Figure 3 This is a schematic diagram showing the structure of a closed loop in another embodiment of the automatic unblocking device for oil well casing gas pipelines in winter according to this utility model.

[0023] Figure 4 This is a schematic diagram illustrating the structure of an elastic element in another embodiment of the automatic unblocking device for oil well casing gas pipelines in winter according to this utility model.

[0024] Figure 5 This is a schematic diagram of the pressure regulating component in an automatic unblocking device for oil well casing gas pipelines in winter according to this utility model.

[0025] Explanation of reference numerals in the attached figures: 1. Automatic conduction assembly; 11. Conductor pipe; 111. First port; 112. Second port; 12. Elastic element; 13. Sealing element; 131. Sealing rod; 1311. Guide groove; 1312. Guide rod; 1313. Connector; 1314. Annular groove; 1315. Sealing ring; 1316. Conical guide surface; 132. Sealing ring; 14. Adjusting cap; 15. Locking nut; 16. Pressure ring; 17. Pressure ring buckle; 2. Methanol supply assembly; 21. T-connector; 211. First pipe body; 212. Second pipe body; 213. Third pipe body; 22. Methanol tank; 23. Vent valve; 3. Pressure regulating assembly; 31. Pressure regulating pipe; 32. Air inlet; 33. Air nozzle; 4. Casing air valve. Detailed Implementation

[0026] The present invention will now be described based on embodiments, but the present invention is not limited to these embodiments. In the following detailed description of the present invention, some specific details are described in detail, but well-known methods, processes, procedures, and elements are not described in detail in order to avoid obscuring the essence of the present invention.

[0027] Furthermore, those skilled in the art should understand that the accompanying drawings provided herein are for illustrative purposes only and are not necessarily drawn to scale.

[0028] Unless the context explicitly requires it, the words "comprising," "including," and similar terms throughout the specification and claims should be interpreted as encompassing rather than being exclusive or exhaustive; that is, meaning "including but not limited to."

[0029] In the description of this utility model, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0030] Reference Figure 1 This invention provides an automatic unblocking device for oil well casing gas pipelines in winter, used to connect casing gas pipelines and alleviate freezing blockage problems caused by low temperatures. It includes an automatic conduction component 1, a methanol supply component 2, and a pressure regulating component 3. The automatic conduction component 1 and the methanol supply component 2 are connected, and the pressure regulating component 3 is located between the automatic conduction component 1 and the casing gas pipeline. The automatic conduction component 1 controls the flow of methanol into the casing gas pipeline to unblock it, while the pressure regulating component 3 regulates the conduction pressure of the automatic conduction component 1, thus improving the applicability of the automatic unblocking device for oil well casing gas pipelines in winter.

[0031] Specifically, refer to Figure 1 and Figure 2The automatic flow control assembly 1 includes a flow tube 11, an elastic element 12, and a sealing element 13. The flow tube 11 is a straight tube, with a first branch tube fixed to one end and a second branch tube fixed to the side shaft of the flow tube 11. Both the first and second branch tubes are connected to the flow tube 11, forming a first port 111 and a second port 112, respectively. The first port 111 is connected to the pressure regulating assembly 3 and also indirectly connected to the gas pipeline. The second port 112 allows methanol to flow into the flow control assembly, enabling methanol to enter the inner cavity of the flow tube 11.

[0032] The sealing element 13 is movably disposed within the conductive tube 11. The sealing element 13 can slide to close the first port 111, obstructing the connection between methanol and the casing gas pipeline. The elastic element 12 is located in the conductive tube 11 and is connected to the sealing element 13. The elastic element 12 can apply pressure to the sealing element 13 to maintain the sealing element 13 in the state of closing the first port 111, thus blocking the connection between the conductive tube 11 and the first port 111.

[0033] The automatic unblocking device for the casing gas pipeline provided in this application relies on the elastic element 12 to apply a certain pressure to the sealing element 13, blocking the inflow of methanol into the casing gas pipeline, thus saving methanol usage without freezing. When freezing occurs, the pressure inside the casing gas pipeline increases, forcing the sealing element 13 away from the first pipe opening 111, making the first pipe opening 111 open, allowing methanol to flow into the casing gas pipeline from the first pipe opening 111, thereby achieving automatic unblocking of the casing gas pipeline.

[0034] As one embodiment, the closure member 13 includes a closure rod 131 and a closure ring 132. The closure ring 132 and the closure rod 131 are coaxially arranged. The closure ring 132 is sleeved on the outside of the closure rod 131 and fixed to the closure rod 131. The closure ring 132 is made of natural rubber. The elastic member 12 can apply elastic force to the closure rod 131, compressing the closure ring 132 to compress the first opening 111 and close the first opening 111.

[0035] Reference Figure 3 In another embodiment, the outer periphery of the sealing rod 131' may also be provided with an annular circumferential groove, and the sealing ring 132' can be inserted into and fixed in the circumferential groove, thereby improving the connection strength and sealing capability of the sealing ring 132' and the sealing rod 131'.

[0036] The automatic conduction assembly 1 also includes an adjusting cap 14 for adjusting the conduction pressure. The adjusting cap 14 can cover the end of the conduction tube 11 away from the first port 111. The outer circumferential surface of the end of the conduction tube 11 away from the first port 111 is provided with a threaded section, so that the adjusting cap 14 can be threadedly connected to the end of the conduction tube 11. The adjusting cap 14 and the elastic element 12 are indirectly connected. When the closing rod 131 and the closing ring 132 close the first port 111, rotating the adjusting cap 14 can adjust the position of the adjusting cap 14 on the conduction tube 11, change the deformation of the elastic element 12, and adjust the conduction pressure of the automatic conduction assembly 1.

[0037] In one embodiment, the guide tube 11 is externally threaded with a locking nut 15, and the end faces of the locking nut 15 and the adjusting cap 14 can abut together. After the adjusting cap 14 is adjusted, the locking nut 15 can be rotated to abut against the adjusting cap 14. This not only locks the position of the adjusting cap 14, but also marks the position if the adjusting cap 14 is accidentally loosened, making it easy to rotate the adjusting cap 14 back to the corresponding position.

[0038] Specifically, a guide groove 1311 is provided inside the closing rod 131, and a guide rod 1312 is inserted through the guide groove 1311. A connecting body 1313 is fixed to the end of the guide rod 1312. The end of the connecting body 1313 away from the guide rod 1312 can abut against the adjusting cap 14. Rotating the adjusting cap 14 can cause the connecting body 1313 to drive the guide rod 1312 to slide in the guide groove 1311.

[0039] As one embodiment, an annular groove 1314 is provided on the periphery of the connector 1313, and a sealing ring 1315 is fixed in the annular groove 1314. The outer periphery of the sealing ring 1315 abuts against the inner side of the conductive pipe 11. The sealing ring 1315 can move with the connector 1313 to prevent methanol and natural gas leakage.

[0040] The elastic element 12 is a spring, which is sleeved on the outside of the sealing rod 131. One end of the spring and the sealing rod 131 can be fixed together, and the end of the spring away from the first pipe opening 111 abuts against the connecting body 1313. When the automatic unblocking device for oil well casing gas pipelines in winter is applied to different casing gas pipelines, the connecting body 1313 can be slid in the guide tube by rotating the adjusting cap 14, thereby changing the compression state of the spring. This allows the pressure to open the sealing rod 131 to meet the needs of different oil wells and pipelines. This flexibility makes the device more widely applicable.

[0041] The elastic element 12 is not necessarily chosen as a spring; for example, refer to... Figure 4In another embodiment, the elastic element 12'' is an elastic ball, and the two ends of the elastic ball are fixed to the connecting part 1313'' and the closing rod 131'' respectively. The elastic ball can also press the closing rod 131'' to close the first pipe opening 111'', and cooperate with the adjusting cap 14'' to adjust the opening pressure of the closing rod 131''.

[0042] Please refer to this again. Figure 2 In one embodiment, the sealing member 13 further includes a pressure ring 16 and a pressure ring buckle 17. The pressure ring 16 and the pressure ring buckle 17 are fixed to the outer periphery of the sealing rod 131. The diameter of the pressure ring 16 is smaller than the inner diameter of the conductive tube 11, so that a gap for methanol flow is left between the pressure ring 16 and the conductive tube 11. The pressure ring 16 is a rigid ring that can abut against the sealing ring 132. When the sealing rod 131 closes the first opening 111, the rigid pressure ring 16 can compress the sealing ring 132, preventing the soft sealing ring 132 from deforming and causing methanol leakage.

[0043] The pressure ring buckle 17 is located on the side of the pressure ring 16 away from the closing ring 132. The pressure ring buckle 17 is fixed to the end of the spring. The pressure ring buckle 17 can provide a fixing space for the spring, so that the end of the spring is stably fixed on the closing rod 131.

[0044] Furthermore, one end of the sealing rod 131 is provided with a tapered guide surface 1316, which extends through the sealing ring 132. When the sealing ring 132 closes the first pipe opening 111, the tapered guide surface 1316 can be inserted into the first pipe opening 111. When the pressure in the gas pipeline decreases, the tapered guide surface 1316 can guide the sealing rod 131 to center the pipeline, ensuring a sealing effect.

[0045] As one embodiment, the pressure regulating component 3 includes a pressure regulating pipe 31, one end of which is threaded to the first branch pipe, so that the pressure regulating pipe 31 can be connected to the conducting pipe 11.

[0046] An air inlet 32 ​​is provided in the middle of the pressure regulating pipe 31. An air nozzle 33 is threadedly connected to the air inlet 32. The air nozzle 33 can communicate with the pressure regulating pipe 31 and can discharge gas into the pressure regulating pipe 31 to change the pressure inside the pressure regulating pipe 31. It can also be used to adjust the opening pressure of the automatic conduction component 1, so that the automatic unblocking device for the oil well casing gas pipeline in winter can be adapted to different pipelines in different oil fields.

[0047] Furthermore, refer to Figure 1 , Figure 5 A casing gas valve 4 is installed between the pressure regulating component 3 and the casing gas pipeline. The casing gas valve 4 is threadedly connected to the pressure regulating pipe 31. The casing gas valve 4 is located between the pressure regulating component 3 and the casing gas pipeline. The casing gas valve 4 can control the connection and closure of the automatic unblocking device of the oil well casing gas pipeline in winter.

[0048] Reference Figure 1 In one embodiment, the methanol supply component 2 includes a three-way pipe 21, which consists of a first pipe body 211, a second pipe body 212, and a third pipe body 213. The first pipe body 211, the second pipe body 212, and the third pipe body 213 are interconnected. The first pipe body 211 is threadedly connected to a second branch pipe, and the first pipe body 211 is connected to a second pipe opening 112. A methanol tank 22 is threadedly connected to the second pipe body 212, and a vent valve 23 is installed at the end of the third pipe body 213. Methanol in the methanol tank 22 can flow from the first pipe body 211 to the automatic conduction component 1. When the methanol tank 22 is empty, the vent valve 23 can be opened first to release the pressure in the methanol tank 22, and then the methanol tank 22 can be replaced to replenish methanol.

[0049] It should be noted that in this utility model, a rubber ring for sealing can be provided at the end face position of each pipe body connected by threads. The installation structure of the rubber ring is prior art and will not be described in detail in this application.

[0050] The method of using this utility model is as follows: Before use, first close the sleeve gas valve 4, and connect the pressure regulating component 3 and the automatic conduction component 1 through the threaded connection.

[0051] Tighten the adjusting cap 14 completely, connect the air pump with the pressure gauge to the air nozzle 33, observe the pressure gauge, and manually pump air until the pressure reaches the pre-opening pressure. The pre-opening pressure is slightly higher than the normal production pressure.

[0052] Loosen the adjusting cap 14 to release the spring pressure. During the loosening process, once the pre-opening pressure value in the pressure gauge drops, the automatic conduction component 1 is in the open state. At this time, the position of the adjusting cap 14 can be defined as the open position. Tighten the locking nut 15 to fix the position of the adjusting cap 14.

[0053] The methanol supply component 2 is installed on the automatic conduction component 1.

[0054] During use, close the vent valve 23 and open the casing gas valve 4. When the casing gas pipeline freezes due to condensation caused by low temperature, the pressure inside the pipeline rises. When the pre-opening pressure is reached, the automatic conduction component 1 opens, and the sealing rod 131 slides to the first port 111 to open. Methanol in methanol tank 22 enters the casing gas pipeline through the conduction pipe 11, pressure regulating pipe 31, and casing gas valve 4 in sequence, and the blockage is cleared in time.

[0055] The pressure inside the casing gas pipeline returns to normal under the action of methanol, the automatic conduction component 1 closes, and the methanol is stored in methanol tank 22.

[0056] After the methanol is used up, close the gas valve 4 on the casing, open the vent valve 23 to release pressure, and slowly remove the methanol tank 22 to replenish methanol.

[0057] Those skilled in the art will understand that, without conflict, the above-mentioned preferred solutions can be freely combined and superimposed.

[0058] It should be understood that the above-described embodiments are merely exemplary and not restrictive. Without departing from the basic principles of this utility model, any obvious or equivalent modifications or substitutions made by those skilled in the art regarding the above details will be included within the scope of the claims of this utility model.

Claims

1. An automatic unblocking device for oil well casing gas pipelines in winter, characterized in that, include: An automatic connection assembly (1) includes a connection tube (11), an elastic element (12), and a sealing element (13). The connection tube (11) is provided with a first port (111) and a second port (112). The gas tubing is connected to the connection tube (11) through the first port (111). The sealing element (13) is movably disposed in the connection tube (11). The elastic element (12) can apply elastic force to the sealing element (13) to close the first port (111). Methanol supply component (2), which is connected to the conduit (11) through the second port (112).

2. The automatic unblocking device for oil well casing gas pipelines in winter as described in claim 1, characterized in that, The closure (13) includes a closure rod (131) and a closure ring (132), the inner circumference of the closure ring (132) is fixed to the closure rod (131), and the elastic member (12) can apply elastic force to the closure rod (131); The automatic conduction assembly (1) further includes an adjusting cap (14), which is threaded to the conduction tube (11) and connected to the elastic element (12).

3. The oil well casing gas line winter automatic unblocking device of claim 2, wherein, The elastic element (12) is a spring, which is sleeved on the outside of the closing rod (131). One end of the spring is fixed to the closing rod (131), and the other end of the spring can be connected to the adjusting cap (14).

4. The automatic unblocking device for oil well casing gas pipelines in winter as described in claim 3, characterized in that, The closure (13) also includes a pressure ring (16) and a pressure ring buckle (17). The pressure ring (16) and the pressure ring buckle (17) are both fixed to the outer periphery of the closure rod (131). The pressure ring (16) abuts against the closure ring (132). The pressure ring buckle (17) is located on the side of the pressure ring (16) away from the closure ring (132). The pressure ring buckle (17) is fixed to the end of the spring.

5. The automatic unblocking device for oil well casing gas pipelines in winter as described in claim 3, characterized in that, The closing rod (131) has a guide groove (1311), a guide rod (1312) is inserted in the guide groove (1311), and a connector (1313) is fixed to the end of the guide rod (1312). The end of the connector (1313) away from the guide rod (1312) can abut against the adjusting cap (14), and one end of the spring abuts against the connector (1313).

6. The automatic unblocking device for oil well casing gas pipelines in winter as described in claim 5, characterized in that, The connector (1313) has an annular groove (1314) on its periphery, and a sealing ring (1315) is fixed in the annular groove (1314). The outer periphery of the sealing ring (1315) abuts against the inner side of the guide tube (11).

7. The automatic unblocking device for oil well casing gas pipelines in winter as described in claim 2, characterized in that, The guide tube (11) is externally threaded with a locking nut (15), which can abut against the adjusting cap (14).

8. The automatic unblocking device for oil well casing gas pipelines in winter as described in claim 1, characterized in that, It also includes a pressure regulating component (3), which includes a pressure regulating pipe (31), one end of which can be connected to the first pipe port (111), and the other end is connected to the sleeve gas pipeline; An air nozzle (33) is provided in the middle of the pressure regulating pipe (31), and the air nozzle (33) is connected to the pressure regulating pipe (31).

9. The automatic unblocking device for oil well casing gas pipelines in winter as described in claim 8, characterized in that, A casing gas valve (4) is provided between the pressure regulating component (3) and the casing gas pipeline.

10. The automatic unblocking device for oil well casing gas pipelines in winter as described in claim 1, characterized in that, The methanol supply assembly (2) includes a three-way pipe (21), which is composed of a first pipe body (211), a second pipe body (212) and a third pipe body (213). The first pipe body (211) and the second pipe port (112) can be connected. The second pipe body (212) is connected to a methanol tank (22). The end of the third pipe body (213) is equipped with a vent valve (23).

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