阅读说明：本技术 带油管泄压功能的振荡空化解堵装置及解堵方法 (Oscillation cavitation deblocking device with oil pipe pressure relief function and deblocking method ) 是由 李鑫 吴享远 李红爽 吴晓明 张绮伦 仇宇第 蔡龙浩 李立超 杨杨 刘晓静 张津 于 2020-06-23 设计创作，主要内容包括：本发明为一种带油管泄压功能的振荡空化解堵装置及解堵方法,该装置包括串接于油管上的井下振荡发声装置和与油套环空连通的地面污水处理结构,还包括并联设置于地面的气液注入结构和泄压结构,所述气液注入结构包括与油管顶端连通的注气结构和注液结构,所述气液注入结构还包括能缓冲回流气液混合物的空循环结构；所述泄压结构包括入口与油管顶端连通的泄压管,所述泄压管上设置泄压阀门,泄压管的出口连通能密封的放喷水槽。本发明在现有技术基础上增加了油管的泄压结构及气液混合物的空循环结构,保证更换解堵层位拆卸油管时油管内无压力,同时使更换油管时不用停注气结构和注液结构,大大缩减施工时间,同时降低安全隐患。(The invention relates to an oscillation cavitation deblocking device with an oil pipe pressure relief function and a deblocking method, wherein the device comprises an underground oscillation sounding device connected to an oil pipe in series, a ground sewage treatment structure communicated with an oil sleeve annulus, a gas-liquid injection structure and a pressure relief structure which are arranged on the ground in parallel, the gas-liquid injection structure comprises a gas injection structure and a liquid injection structure communicated with the top end of the oil pipe, and the gas-liquid injection structure also comprises an air circulation structure capable of buffering a backflow gas-liquid mixture; the pressure relief structure comprises a pressure relief pipe with an inlet communicated with the top end of the oil pipe, a pressure relief valve is arranged on the pressure relief pipe, and an outlet of the pressure relief pipe is communicated with a blowout water tank capable of being sealed. The invention adds the pressure relief structure of the oil pipe and the air circulation structure of the gas-liquid mixture on the basis of the prior art, ensures that no pressure exists in the oil pipe when the oil pipe is disassembled at the plug removal position, simultaneously ensures that the gas injection structure and the liquid injection structure are not stopped when the oil pipe is replaced, greatly shortens the construction time and reduces the potential safety hazard.)

1. The oscillation cavitation deblocking device with the oil pipe pressure relief function comprises an underground oscillation sounding device connected to an oil pipe in series and a ground sewage treatment structure communicated with an oil sleeve annulus, and is characterized by further comprising a gas-liquid injection structure and a pressure relief structure which are arranged on the ground in parallel, wherein the gas-liquid injection structure comprises a gas injection structure and a liquid injection structure communicated with the top end of the oil pipe, and the gas-liquid injection structure further comprises an air circulation structure capable of buffering a backflow gas-liquid mixture; the pressure relief structure comprises a pressure relief pipe with an inlet communicated with the top end of the oil pipe, a pressure relief valve is arranged on the pressure relief pipe, and an outlet of the pressure relief pipe is communicated with a blowout water tank capable of being sealed.

2. The oscillation cavitation deblocking device with the oil pipe pressure relief function according to claim 1, wherein the gas-liquid injection structure comprises an injection valve communicated with the top end of the oil pipe, the injection valve is communicated with a gas injection structure and a liquid injection structure, the liquid injection structure comprises a water injection pump truck, a water injection tank and a water supply tank truck which are connected in sequence, the water injection pump truck is communicated with the injection valve, the air circulation structure comprises a circulation pipe communicated with the injection valve and the water injection tank, and a circulation valve is arranged on the circulation pipe.

3. The oscillation cavitation deblocking device with oil pipe decompression function according to claim 2, wherein the blowout water tank is arranged in a sealed hollow shell, and the top of the hollow shell is provided with an exhaust hole.

4. The oscillation cavitation deblocking device with the oil pipe pressure relief function according to claim 2, comprising a three-way joint, wherein three ports of the three-way joint are respectively a first port, a second port and a third port, the first port is communicated with the oil pipe, the second port is communicated with the inlet of the pressure relief pipe, and the third port is communicated with the injection valve.

5. The oscillatory cavitation deblocking device with tubing relief function of claim 4, wherein the first port of the three-way connection communicates with the tubing via a hose.

6. The oscillation cavitation deblocking device with the oil pipe pressure relief function according to claim 2, comprising a four-way joint, wherein four ports of the four-way joint are respectively a fourth port, a fifth port, a sixth port and a seventh port, the fourth port is communicated with the injection valve, the fifth port is communicated with the gas injection structure, the sixth port is communicated with the water injection pump truck, and the seventh port is communicated with the circulation pipe.

7. The oscillation cavitation plug removal device with the oil pipe pressure relief function according to claim 2, wherein the ground sewage treatment structure comprises a sewage tank, a water pump truck and a sewage transport truck which are connected in sequence, and the sewage tank is communicated with the oil jacket annulus.

8. The oscillatory cavitation deblocking device with oil pipe pressure relief function according to claim 1, wherein the gas injection structure is a nitrogen vehicle.

9. A deblocking method using the oscillation cavitation deblocking device with the oil pipe pressure relief function according to any one of claims 2 to 8, characterized in that during normal deblocking, the air circulation structure and the pressure relief structure are closed, a high-pressure gas-liquid mixture is injected into an oil pipe through the gas injection structure and the liquid injection structure, the underground oscillation sounding device is started to excite sound wave oscillation to perform deblocking, and a blocking object is discharged from an oil sleeve ring in an empty mode under the action of negative pressure and flows into a ground sewage treatment structure; when the blockage removing position needs to be replaced, firstly, opening an empty circulation structure, buffering a backflow gas-liquid mixture, and closing an injection valve; opening a pressure relief valve, and allowing the gas-liquid mixture in the oil pipe to enter the open-flow water tank through a pressure relief pipe; and after the oil pipe is decompressed, the oil pipe is pulled down to complete the replacement of the blockage removing layer.

10. The unblocking method according to claim 9 comprising the steps of,

step a, normally removing the blockage, namely, putting the underground oscillation sound generating device into a blockage removing position along with an oil pipe, closing a pressure relief valve and a circulating valve, opening an injection valve, injecting a high-pressure gas-liquid mixture into the oil pipe through a gas injection structure and a liquid injection structure, starting the underground oscillation sound generating device to excite sound wave oscillation to remove the blockage, and enabling a blockage to be discharged out of a shaft from an oil sleeve ring in an empty mode under the action of negative pressure and flow into a ground sewage treatment structure;

b, when the blockage removing layer position needs to be replaced, firstly opening a circulating valve, buffering and refluxing a gas-liquid mixture, and closing an injection valve; opening a pressure relief valve, enabling the gas-liquid mixture in the oil pipe to enter the open-flow water tank through a pressure relief pipe, and discharging the gas in the gas-liquid mixture through a vent hole; releasing the pressure of the oil pipe, and pulling the oil pipe to replace a blockage removing layer after no gas-liquid mixture flows into the open-flow water tank;

and c, after the plug removal layer position is replaced, closing the pressure relief valve, opening the injection valve, starting the gas injection structure and the liquid injection structure, closing the circulating valve, and entering the next normal plug removal process.

Technical Field

The invention relates to the technical field of oil extraction processes, in particular to an oscillation cavitation plug removal device with an oil pipe pressure relief function and a plug removal method.

Background

The principle of the oscillation cavitation blockage removal technology is shown in fig. 5, high-pressure gas-liquid mixed fluid is injected into an oil pipe 91 in an oil well through a pump truck 93 and a nitrogen truck 94, the underground oscillation sound production device 8 excites sound wave oscillation and cavitation, blockage removal is carried out on a hole channel close to the well and a screen pipe blockage, and the action distance can reach more than 10m in the radial direction; the blockage is discharged back out of the shaft from the oil sleeve annulus 92 under the action of negative pressure, flows into the sewage water tank 71 and is collected and treated by the sewage transport vehicle 73.

In the practical application process, the blockage removing position is often more than a point, at the moment, the pump truck and the nitrogen truck need to be stopped, the sewage tank continuously discharges water to remove the pressure in the oil pipe column, and after the pressure is released for 5-10 minutes, the oil pipe is lifted or lowered by a small maintenance crew. Although the pressure in the oil pipe can be discharged from one end of the sewage tank (namely one end of the oil sleeve annulus), the pressure of a large amount of nitrogen in the oil pipe cannot be completely discharged due to the existence of the underground oscillation generating device, the phenomenon of blockage removing liquid splashing still exists when the oil pipe is disassembled at a wellhead, the highest splashing height can reach 5-8 meters, and hidden danger is brought to operation safety. Meanwhile, when the construction is carried out again after the blockage removing position is changed, in order to ensure the construction quality and ensure that the nitrogen and the blockage removing liquid are fully mixed, 5-10 minutes are additionally added outside the designed blockage removing time to ensure that the restarted nitrogen vehicle and the pump vehicle fully work and ensure that the gas and the liquid are fully mixed. In the practical application process, the operation of replacing the blockage removing layer usually needs 30 minutes to 1 hour, so that potential safety hazards exist, and a large amount of time is consumed.

Therefore, the inventor provides an oscillation cavitation deblocking device with an oil pipe pressure relief function and a deblocking method by means of experience and practice of related industries for many years, so as to overcome the defects of the prior art.

Disclosure of Invention

The invention aims to provide an oscillation cavitation deblocking device with an oil pipe pressure relief function and a deblocking method, which are characterized in that an oil pipe pressure relief structure and an air circulation structure of a gas-liquid mixture are added on the basis of the prior art, so that no pressure exists in an oil pipe when the oil pipe is disassembled at a blockage removal position, and meanwhile, a gas injection structure and a liquid injection structure are not required to be stopped when the oil pipe is replaced, so that the construction time is greatly shortened, and the potential safety hazard is reduced.

The invention aims to realize the purpose, and the oscillation cavitation deblocking device with the oil pipe pressure relief function comprises an underground oscillation sounding device connected to an oil pipe in series, a ground sewage treatment structure communicated with an oil sleeve annulus, a gas-liquid injection structure and a pressure relief structure which are arranged on the ground in parallel, wherein the gas-liquid injection structure comprises a gas injection structure and a liquid injection structure communicated with the top end of the oil pipe, and the gas-liquid injection structure also comprises an air circulation structure capable of buffering and refluxing a gas-liquid mixture; the pressure relief structure comprises a pressure relief pipe with an inlet communicated with the top end of the oil pipe, a pressure relief valve is arranged on the pressure relief pipe, and an outlet of the pressure relief pipe is communicated with a blowout water tank capable of being sealed.

In a preferred embodiment of the present invention, the gas-liquid injection structure includes an injection valve communicated with the top end of the oil pipe, the injection valve is communicated with the gas injection structure and the liquid injection structure, the liquid injection structure includes a water injection pump truck, a water injection tank and a water supply tank truck which are connected in sequence, the water injection pump truck is communicated with the injection valve, the air circulation structure includes a circulation pipe communicated with the injection valve and the water injection tank, and the circulation pipe is provided with a circulation valve.

In a preferred embodiment of the present invention, the water spraying tank is a sealed hollow casing, and the top of the hollow casing is provided with an exhaust hole.

In a preferred embodiment of the present invention, the oscillation cavitation deblocking device with the oil pipe pressure relief function includes a three-way joint, three ports of the three-way joint are respectively a first port, a second port, and a third port, the first port is communicated with the oil pipe, the second port is communicated with the inlet of the pressure relief pipe, and the third port is communicated with the injection valve.

In a preferred embodiment of the present invention, the first port of the three-way joint is communicated with the oil pipe through a hose.

In a preferred embodiment of the present invention, the oscillation cavitation deblocking device with the oil pipe pressure relief function includes a four-way joint, four ports of the four-way joint are respectively a fourth port, a fifth port, a sixth port and a seventh port, the fourth port is communicated with the injection valve, the fifth port is communicated with the gas injection structure, the sixth port is communicated with the water injection pump truck, and the seventh port is communicated with the circulation pipe.

In a preferred embodiment of the invention, the ground sewage treatment structure comprises a sewage tank, a water pump truck and a sewage transport truck which are connected in sequence, and the sewage tank is communicated with the oil sleeve annulus.

In a preferred embodiment of the present invention, the gas injection structure is a nitrogen vehicle.

The aim of the invention can be also achieved by the blockage removing method, when the blockage is normally removed, the air circulation structure and the pressure relief structure are closed, a high-pressure gas-liquid mixture is injected into an oil pipe through the gas injection structure and the liquid injection structure, the underground oscillation sounding device is started to excite the sound wave oscillation to remove the blockage, and a blockage returns to a shaft from the oil sleeve ring under the action of negative pressure and flows into the ground sewage treatment structure; when the blockage removing position needs to be replaced, firstly, opening an empty circulation structure, buffering a backflow gas-liquid mixture, and closing an injection valve; opening a pressure relief valve, and allowing the gas-liquid mixture in the oil pipe to enter the open-flow water tank through a pressure relief pipe; and after the oil pipe is decompressed, the oil pipe is pulled down to complete the replacement of the blockage removing layer.

In a preferred embodiment of the present invention, the unblocking method includes the following steps,

step a, normally removing the blockage, namely, putting the underground oscillation sound generating device into a blockage removing position along with an oil pipe, closing a pressure relief valve and a circulating valve, opening an injection valve, injecting a high-pressure gas-liquid mixture into the oil pipe through a gas injection structure and a liquid injection structure, starting the underground oscillation sound generating device to excite sound wave oscillation to remove the blockage, and enabling a blockage to be discharged out of a shaft from an oil sleeve ring in an empty mode under the action of negative pressure and flow into a ground sewage treatment structure;

b, when the blockage removing layer position needs to be replaced, firstly opening a circulating valve, buffering and refluxing a gas-liquid mixture, and closing an injection valve; opening a pressure relief valve, enabling the gas-liquid mixture in the oil pipe to enter the open-flow water tank through a pressure relief pipe, and discharging the gas in the gas-liquid mixture through a vent hole; releasing the pressure of the oil pipe, and pulling the oil pipe to replace a blockage removing layer after no gas-liquid mixture flows into the open-flow water tank;

and c, after the plug removal layer position is replaced, closing the pressure relief valve, opening the injection valve, starting the gas injection structure and the liquid injection structure, closing the circulating valve, and entering the next normal plug removal process.

From the above, the oscillation cavitation deblocking device with the oil pipe pressure relief function and the deblocking method provided by the invention have the following beneficial effects:

according to the oscillation cavitation deblocking device with the oil pipe pressure relief function and the deblocking method, the pressure relief structure of the oil pipe and the air circulation structure of a gas-liquid mixture are added on the basis of the prior art, when a deblocking layer needs to be replaced, the oil pipe is relieved through the air circulation structure and the pressure relief structure, and no pressure exists in the oil pipe when the oil pipe is lifted; the open-flow water tank is designed by a closed structure, so that the mixed liquid is prevented from splashing to pollute the ground; meanwhile, the gas injection structure and the liquid injection structure are not required to be stopped when the oil pipe is replaced, so that the construction time is greatly shortened, and the potential safety hazard is reduced.

Drawings

The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention.

Wherein:

FIG. 1: the invention is a schematic diagram of the oscillation cavitation deblocking device with the oil pipe pressure relief function.

FIG. 2: is a schematic diagram of the gas-liquid injection structure and the air circulation structure of the present invention.

FIG. 3: is a schematic diagram of the pressure relief structure of the present invention.

FIG. 4: is a schematic diagram of the ground sewage treatment structure of the invention.

FIG. 5: is a schematic diagram of the prior art for removing blockage by oscillation cavitation.

In the figure:

100. the oscillation cavitation deblocking device has the oil pipe pressure relief function;

1. a gas-liquid injection structure; 11. a gas injection structure; 12. a liquid injection structure; 121. a water injection pump truck; 122. a water injection tank; 123. a water supply tank car; 13. an injection valve;

2. an empty loop structure; 21. a circulation pipe; 22. a circulation valve;

3. a pressure relief structure; 31. a pressure relief pipe; 32. a pressure relief valve; 33. a water spraying tank; 331. an exhaust hole;

4. a three-way joint; 41. a first interface; 42. a second interface; 43. a third interface;

5. a hose;

6. a four-way joint; 61. a fourth interface; 62. a fifth interface; 63. a sixth interface; 64. a seventh interface;

7. a ground sewage treatment structure; 71. a sewage tank; 72. a pump truck; 73. a sewage transport vehicle;

8. an underground oscillation sounding device;

91. an oil pipe; 92. an oil jacket annulus; 93. a pump truck; 94. and (4) carrying out nitrogen vehicle.

Detailed Description

In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.

The specific embodiments of the present invention described herein are for the purpose of illustration only and are not to be construed as limiting the invention in any way. Any possible variations based on the present invention may be conceived by the skilled person in the light of the teachings of the present invention, and these should be considered to fall within the scope of the present invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, indirect connections through intermediaries, and the like. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 to 4, the invention provides an oscillation cavitation deblocking device 100 with an oil pipe pressure relief function, which comprises a downhole oscillation sounding device 8 connected in series on an oil pipe 91, a ground sewage treatment structure 7 communicated with an oil sleeve annulus 92, a gas-liquid injection structure 1 and a pressure relief structure 3 which are arranged on the ground in parallel, wherein the gas-liquid injection structure 1 comprises a gas injection structure 11 and a liquid injection structure 12 communicated with the top end of the oil pipe, and the gas-liquid injection structure 1 further comprises an air circulation structure 2 capable of buffering and refluxing a gas-liquid mixture; the pressure relief structure 3 comprises a pressure relief pipe 31 with an inlet communicated with the top end of the oil pipe 91, a pressure relief valve 32 is arranged on the pressure relief pipe 31, and an outlet of the pressure relief pipe 31 is communicated with a sealable blowout water tank 33.

In the oscillation cavitation deblocking device with the oil pipe pressure relief function, the pressure relief structure of the oil pipe and the air circulation structure of the gas-liquid mixture are added on the basis of the prior art, when a deblocking layer needs to be replaced, the oil pipe is relieved through the air circulation structure and the pressure relief structure, and no pressure exists in the oil pipe when the oil pipe is lifted; the open-flow water tank is designed by a closed structure, so that the mixed liquid is prevented from splashing to pollute the ground; meanwhile, the gas injection structure and the liquid injection structure are not required to be stopped when the oil pipe is replaced, so that the construction time is greatly shortened, and the potential safety hazard is reduced.

Further, as shown in fig. 1 and 2, the gas-liquid injection structure 1 includes an injection valve 13 communicated with the top end of the oil pipe 91, the injection valve 13 communicates with the gas injection structure 11 and the liquid injection structure 12, the liquid injection structure 12 includes a water injection pump truck 121, a water injection tank 122 and a water supply tank truck 123 which are connected in sequence, the water injection pump truck 121 communicates with the injection valve 13, the air circulation structure 2 includes a circulation pipe 21 communicating the injection valve 13 and the water injection tank 122, and a circulation valve 22 is disposed on the circulation pipe 21.

Further, as shown in fig. 1 and 3, the water spray tank 33 is provided in a sealed hollow case, and an air vent hole 331 is provided in the top of the hollow case. When the oil well is depressurized, the gas-liquid mixture in the oil pipe flows into the blowout water tank 33, and the gas therein is discharged through the exhaust hole 331.

Further, as shown in fig. 1, the oscillation cavitation deblocking device 100 with the oil pipe pressure relief function further includes a three-way joint 4, three ports of the three-way joint 4 are respectively a first port 41, a second port 42, and a third port 43, the first port 41 is communicated with the oil pipe 91, the second port 42 is communicated with an inlet of the pressure relief pipe 31, and the third port 43 is communicated with the injection valve 13.

For convenient communication, the first port 41 of the three-way joint 4 is communicated with the oil pipe 91 through the hose 5.

Further, as shown in fig. 1, the oscillation cavitation deblocking device 100 with the oil pipe pressure relief function further includes a four-way joint 6, four ports of the four-way joint 6 are respectively set as a fourth port 61, a fifth port 62, a sixth port 63, and a seventh port 64, the fourth port 61 is communicated with the injection valve 13, the fifth port 62 is communicated with the gas injection structure 11, the sixth port 63 is communicated with the water injection pump truck 121, and the seventh port 64 is communicated with the circulation pipe 21.

Further, as shown in fig. 1 and 4, the ground sewage treatment structure 7 includes a sewage tank 71, a pump truck 72 and a sewage transport truck 73 connected in sequence, and the sewage tank 71 is communicated with the oil jacket annulus 92. After the blockage is removed by oscillation cavitation, the blockage is discharged back out of the shaft from the oil sleeve annulus 92 under the action of negative pressure.

Further, the gas injection structure 11 is a nitrogen vehicle.

The invention also provides a deblocking method of the oscillation cavitation deblocking device with the oil pipe pressure relief function, when normal deblocking is carried out, the air circulation structure 2 and the pressure relief structure 3 are closed, high-pressure gas-liquid mixture is injected into the oil pipe 91 through the gas injection structure 11 and the liquid injection structure 12, the underground oscillation sounding device 8 is started to excite sound wave oscillation to implement deblocking, and a blocking object returns from the oil sleeve annulus 92 to be discharged out of a shaft under the action of negative pressure and flows into the ground sewage treatment structure 7; when the blockage removing position needs to be replaced, the air circulation structure 2 is firstly opened, the gas-liquid mixture is buffered and refluxed, and the injection valve 13 is closed; opening a pressure relief valve 32, and allowing the gas-liquid mixture in the oil pipe 91 to enter the open-flow water tank 33 through a pressure relief pipe 31; after the oil pipe 91 is decompressed, the oil pipe is pulled out, and the plug removal position replacement is completed.

The blockage removing method comprises the following specific steps:

step a, normally removing the blockage, namely, a downhole oscillation sound generating device 8 is lowered into a blockage removing position along with an oil pipe 91, a pressure relief valve 32 and a circulating valve 22 are closed, an injection valve 13 is opened, a high-pressure gas-liquid mixture is injected into the oil pipe through a gas injection structure 11 (nitrogen vehicle) and a liquid injection structure 12, a water supply tank vehicle 123 injects water into a water injection tank 122, a water injection pump vehicle 121 injects liquid in the water injection tank 122 to a four-way joint 6, the gas injection structure 11 (nitrogen vehicle) injects nitrogen into the four-way joint 6, and the gas-liquid mixture is injected into the oil pipe 91 through a hose 5 after forming the high-pressure gas-liquid mixture; starting the underground oscillation sounding device 8 to excite sound wave oscillation to implement blockage removal, and enabling the blockage to return to a shaft from the oil sleeve ring under the action of negative pressure and flow into the ground sewage treatment structure 7;

b, when the blockage removing position needs to be replaced, firstly opening the circulating valve 22, buffering and refluxing the gas-liquid mixture, namely, the liquid pumped out by the water injection pump truck 121 and the nitrogen mixture provided by the gas injection structure 11 (nitrogen truck) flow back to the water injection water tank 122 through the circulating pipe 21 and the circulating valve 22, closing the injection valve 13, and cutting off the process of injecting the high-pressure gas-liquid mixture into the oil pipe;

the pressure relief valve 32 is opened, the gas-liquid mixture in the oil pipe enters the open-flow water tank 33 through the pressure relief pipe 31, the open-flow water tank 33 adopts a closed structure design to prevent the mixed liquid from splashing out to pollute the ground, and the gas (nitrogen) in the gas-liquid mixture is discharged through the exhaust hole 331;

releasing the pressure of the oil pipe, and after no gas-liquid mixture flows into the open-flow water tank (the pressure of the oil pipe is completely released), pulling the oil pipe 91 and replacing a blockage removal layer;

and c, after the plug removal layer position is replaced, closing the pressure relief valve 32, opening the injection valve 13, starting the gas injection structure 11 and the liquid injection structure 12, closing the circulating valve 22, and entering the next normal plug removal process.

From the above, the oscillation cavitation deblocking device with the oil pipe pressure relief function and the deblocking method provided by the invention have the following beneficial effects:

according to the oscillation cavitation deblocking device with the oil pipe pressure relief function and the deblocking method, the pressure relief structure of the oil pipe and the air circulation structure of a gas-liquid mixture are added on the basis of the prior art, when a deblocking layer needs to be replaced, the oil pipe is relieved through the air circulation structure and the pressure relief structure, and no pressure exists in the oil pipe when the oil pipe is lifted; the open-flow water tank is designed by a closed structure, so that the mixed liquid is prevented from splashing to pollute the ground; meanwhile, the gas injection structure and the liquid injection structure are not required to be stopped when the oil pipe is replaced, so that the construction time is greatly shortened, and the potential safety hazard is reduced.

The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the invention should fall within the protection scope of the invention.