CN213478283U - Underground oil pipe leakage simulation system - Google Patents
Underground oil pipe leakage simulation system Download PDFInfo
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- CN213478283U CN213478283U CN202021162787.9U CN202021162787U CN213478283U CN 213478283 U CN213478283 U CN 213478283U CN 202021162787 U CN202021162787 U CN 202021162787U CN 213478283 U CN213478283 U CN 213478283U
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- 238000004088 simulation Methods 0.000 title claims abstract description 98
- 239000012530 fluid Substances 0.000 claims abstract description 45
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 239000007789 gas Substances 0.000 claims description 27
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 5
- 210000002445 nipple Anatomy 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000011160 research Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
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- Examining Or Testing Airtightness (AREA)
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Abstract
本实用新型提供了一种井下油管泄漏模拟系统，包括：管柱模拟单元、流体模拟单元和流体收集单元；管柱模拟单元包括顺次连接的水平段、弯曲段和竖直段，竖直段的下端形成进口端，水平段背对竖直段的端部形成出口端；水平段形成管体及环空模拟部分，弯曲段形成液面模拟部分，出口端设有井口模拟部分；管柱模拟单元包括外层管、穿设在外层管中的内层管；外层管与内层管之间形成环空，内层管上设有与环空连通的泄漏孔；流体模拟单元与进口端连通，用于向内层管中充注气体；流体收集单元与井口模拟部分连通，用于回收经由内层管和环空排出的气体。本实用新型实施例的井下油管泄漏模拟系统能够实现井下油管泄漏的模拟。
The utility model provides a downhole oil pipe leakage simulation system, comprising: a pipe string simulation unit, a fluid simulation unit and a fluid collection unit; the pipe string simulation unit includes a horizontal section, a curved section and a vertical section connected in sequence, and the vertical section The lower end of the tube forms the inlet end, the end of the horizontal section facing away from the vertical section forms the outlet end; the horizontal section forms the pipe body and annulus simulation part, the curved section forms the liquid level simulation part, and the outlet end is provided with a wellhead simulation part; The unit includes an outer layer tube and an inner layer tube passing through the outer layer tube; an annulus is formed between the outer layer tube and the inner layer tube, and the inner layer tube is provided with a leak hole communicating with the annulus; the fluid simulation unit and the inlet end The fluid collection unit communicates with the wellhead simulation part for recovering the gas exhausted through the inner tube and the annulus. The downhole oil pipe leakage simulation system of the embodiment of the present invention can realize the simulation of downhole oil pipe leakage.
Description
Technical Field
The utility model belongs to the technical field of gas well oil pipe leak testing in the pit, especially, relate to an oil pipe leaks analog system in the pit, can realize the simulation to production tubular column and fluidic.
Background
The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
The leakage of the casing and the production string is an important problem which troubles the safety development of the gas well, and the leakage of the casing and the production string is particularly serious in the middle and later stages of the development of the oil field. Oil pipe leakage can cause natural gas to leak into the annular space between the oil pipe and the production casing, so that the yield of a gas well is influenced, the safety production of the gas well is damaged, and blowout and well kick even occur in severe cases.
Because the underground pipe column has a unique structure and complex wellhead conditions, if a plurality of layers of pipe columns, oil casing pipe quality differences, underground high-pressure large-flow natural gas flow and the like exist, the underground working condition is difficult to simulate by the current stage research technology.
It should be noted that the above background description is only for the sake of clarity and complete description of the technical solutions of the present invention, and is set forth for facilitating understanding of those skilled in the art. These solutions are not considered to be known to the person skilled in the art merely because they have been set forth in the background section of the present invention.
SUMMERY OF THE UTILITY MODEL
Based on aforementioned prior art defect, the embodiment of the utility model provides an oil pipe leaks analog system in pit, its simulation that can realize oil pipe in pit and leak.
In order to achieve the above object, the present invention provides the following technical solutions.
A downhole oil pipe leakage simulation system comprises a pipe column simulation unit, a fluid simulation unit and a fluid collection unit; the pipe column simulation unit comprises a horizontal section, a bent section and a vertical section which are connected in sequence, wherein the lower end of the vertical section forms an inlet end, and the end part of the horizontal section back to the vertical section forms an outlet end; the horizontal section forms a pipe body and an annular simulation part, the bent section forms a liquid level simulation part, and the outlet end is provided with a wellhead simulation part;
the string simulation unit includes: the outer layer pipe and the inner layer pipe penetrate through the outer layer pipe; an annulus is formed between the outer layer pipe and the inner layer pipe, and a leakage hole communicated with the annulus is formed in the inner layer pipe;
the fluid simulation unit is communicated with the inlet end and is used for filling gas into the inner-layer pipe; the fluid collection unit is in communication with the wellhead simulation section for recovering gas exhausted through the inner tubular and annulus.
Preferably, the outer tube comprises: the well head simulation device comprises a horizontal section sleeve, an outer layer bent pipe connected to the end part of the horizontal section sleeve, which is opposite to the well head simulation part, a vertical section sleeve connected to the lower end of the outer layer bent pipe, and a sleeve plugging end cover arranged at the lower end of the vertical section sleeve.
Preferably, the inner tube comprises: the oil pipe comprises a horizontal section oil pipe, an outer layer bent pipe connected to the end part of the horizontal section oil pipe back to the wellhead simulation part, a vertical section oil pipe connected to the lower end of the outer layer bent pipe, and an oil pipe plugging end cover arranged at the lower end of the vertical section oil pipe.
Preferably, the inner tube further comprises: the oil pipe nipple is detachably connected between the vertical section of oil pipe and the oil pipe plugging end cover, and the leakage hole is formed in the pipe wall of the oil pipe nipple.
Preferably, the oil pipe plugging end cover is connected with a metal hose, and the lower end of the metal hose penetrates out of the sleeve plugging end cover to be communicated with the fluid simulation unit.
Preferably, the fluid simulation unit includes: the system comprises a nitrogen making machine, a low-pressure storage tank connected with the nitrogen making machine, a compressor connected with the low-pressure storage tank, and a high-pressure storage tank connected with the compressor; the high-pressure storage tank is communicated with the metal hose.
Preferably, a first safety valve is arranged on the low-pressure storage tank, and a second safety valve is arranged on the high-pressure storage tank; and a first switch valve and a first check valve are arranged on a pipeline connecting the compressor and the high-pressure storage tank, and a second switch valve and a flowmeter are arranged on a pipeline connecting the high-pressure storage tank and the metal hose.
Preferably, the number of the high-pressure storage tanks is plural, and a plurality of the high-pressure storage tanks are arranged in parallel.
Preferably, the wellhead simulation part comprises: the wellhead cross joint comprises a wellhead cross joint body, a plugging piece, a detection element and a gate valve, wherein the first port of the wellhead cross joint body is connected with the outlet end of the wellhead cross joint body; the gate valve is in communication with the fluid collection unit.
Preferably, the fluid collection unit comprises: the gate valve is communicated with the gas storage tank; the gas storage tank is provided with a third safety valve, a pipeline connecting the gate valve and the gas storage tank is provided with a second switch valve and a second check valve, and the exhaust pipe is provided with a third switch valve.
The utility model discloses a tubular column analog unit can control leak hole shape, size and position, can control the height of liquid level. The fluid simulation unit can control the leakage flow, thereby completing the detection experiment of the leakage amount, the liquid level depth and the leakage point position.
The utility model discloses be integrated into oil pipe leakage analog system with tubular column analog unit, fluid analog unit and fluid collection unit, can the real simulation operating condition leak the form, have higher maneuverability and on-the-spot reduction degree.
The utility model discloses structural design is simple reliable, can realize the simulation that oil pipe leaked in the pit to can carry out deep research to oil pipe leakage from the aspect of theory and practice better, provide the basis to developing of oil pipe leak testing research.
Specific embodiments of the present invention are disclosed in detail with reference to the following description and accompanying drawings, which specify the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the present invention are not so limited in scope.
Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.
It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for helping the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. The skilled person in the art can, under the teaching of the present invention, choose various possible shapes and proportional dimensions to implement the invention according to the specific situation. In the drawings:
fig. 1 is a functional block diagram of a downhole tubing leak simulation system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a tubular column simulation unit in the downhole oil pipe leakage simulation system according to the embodiment of the present invention;
FIG. 3 is a schematic diagram of a horizontal section of the pipe string simulation unit of FIG. 2;
FIG. 4 is a schematic diagram of the structure of a curved section of the column simulation unit of FIG. 2;
FIG. 5 is a schematic diagram of the structure of a vertical section of the pipe string simulation unit of FIG. 2;
fig. 6 is a schematic structural diagram of a fluid simulation unit in the downhole oil pipe leakage simulation system according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a fluid collection unit in a downhole tubing leakage simulation system according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection 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 "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a single 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 invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. 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, the embodiment of the utility model provides a tubing leakage analog system in pit, it mainly includes three bold: namely, the fluid simulation unit 100, the string simulation unit 200, and the fluid collection unit 300, which are connected in series.
As shown in fig. 2, the column simulation unit 200 is horizontally disposed as a whole, placed on the pipe body support 400, and elevated above the ground, and may include a horizontal section 201, a curved section 202, and a vertical section 203, which are connected in this order. Wherein the lower end of the vertical section 203 forms an inlet end and the end of the horizontal section 201 facing away from the vertical section 203 (the right end as viewed in fig. 2) forms an outlet end. The horizontal section 201 forms a pipe body and an annular simulation part, the bent section 202 forms a liquid level simulation part, and the outlet end is provided with a wellhead simulation part 500. Specifically, as shown in fig. 3 and 4, the pipe column simulation unit 200 includes an outer pipe and an inner pipe inserted into the outer pipe. An annular space 204 is formed between the outer layer pipe and the inner layer pipe, a leakage hole 205 is formed in the inner layer pipe, and the leakage hole 205 is communicated with the annular space 204 and the inner layer pipe.
Wherein the fluid simulation unit 100 communicates with the inlet end of the string simulation unit 200 for filling the inner tube with gas. The fluid collection unit 300 communicates with a wellhead simulation portion 500 provided at the outlet end of the string simulation unit 200 for recovering the gas exhausted through the inner pipe and annulus 204.
As shown in fig. 3 to 5, the outer pipe may include a horizontal casing 206, an outer elbow 207 connected to an end (left end as viewed in fig. 2) of the horizontal casing 206 facing away from the wellhead simulation part 500, a vertical casing 208 connected to a lower end of the outer elbow 207, and a casing stopper end cap 209 provided at a lower end of the vertical casing 208.
Preferably, the outer pipe may further comprise a casing sub 210 detachably connected between the vertical section casing 208 and a casing plugging end cap 209, the casing plugging end cap 209 being provided at a lower end of the casing sub 210. Thus, the casing seal end cap 209 may be secured to the lower end of the casing sub 210, and the casing sub 210 may be releasably connected to the lower end of the vertical section casing 208. Therefore, the length of the vertical section casing 208 can be prolonged and shortened by disassembling the casing nipple 210, so that the application range of the simulation test of the downhole oil pipe leakage simulation system is expanded.
The outer tube may be provided with a pressure/temperature gauge connection port 211 near the leak hole 205 to provide a pressure gauge and a temperature gauge for real-time detection of pressure and temperature at the leak point. The pressure gauge and the thermometer can send detected data to the computing processing terminal through the acquisition card, and analog detection is realized.
The horizontal section sleeve 206, the outer bent pipe 207 and the vertical section sleeve 208 can be detachably connected through flanges respectively arranged at the ends. Wherein, the outer layer bent pipe 207 can form a liquid level as a water storage mechanism, and the liquid level is formed by injecting a certain amount of water into the outer layer bent pipe 207. The vertical section of the sleeve 208, which is attached to the lower end of the outer elbow 207, increases the depth of the liquid surface. Therefore, the simulation of the actual well depth and the liquid level is realized, the liquid level simulation is more consistent with the actual working condition, and the accuracy of the simulation result and the guidance of the actual engineering are further improved.
Also, as shown in fig. 3-5, the inner tubing may include a horizontal length of tubing 212, an inner elbow 213 connected to an end (left end as viewed in fig. 2) of the horizontal length of tubing 212 opposite the wellhead simulation section 500, a vertical length of tubing 214 connected to a lower end of the outer elbow 207, and a tubing shutoff end cap 215 disposed at a lower end of the vertical length of tubing 214. Horizontal length of tubing 212 is threaded into horizontal length of tubing 206, inner elbow 213 is threaded into outer elbow 207, and vertical length of tubing 214 is threaded into vertical length of tubing 208.
The inner pipe may also include a tubing sub 216 detachably connected between the vertical section tubing 214 and a tubing plugging end cap 215, the leak-off hole 205 being provided in the wall of the tubing sub 216, the tubing plugging end cap 215 being provided at the lower end of the tubing sub 216, adapted to the vertical section casing 208. Therefore, by disassembling the oil pipe short joint 216, the length of the vertical section oil pipe 214 can be prolonged and shortened, and the application range of the simulation test of the simulation system is expanded.
As shown in fig. 5, a metal hose 217 may be connected to the tubing blocking end cap 215, and a lower end of the metal hose 217 is passed out to the outside via the casing blocking end cap 209 to communicate with the fluid simulation unit 100. The metal hose 217 is communicated with the inner layer pipe, a through hole can be arranged on the sleeve blocking end cover 209, and the metal hose 217 penetrates through the through hole.
In addition, the vertical length of tubing 214 and tubing sub 216 may be interconnected using a collar 218, with isolation of the inner tubing from the annulus 204 being achieved by tubing-plugging end caps 215. As shown in fig. 3, an inter-tube support 219 may be provided outside the inner tube to allow the inner tube to be stably fixed in the outer tube. Specifically, the inter-tube support 219 includes a ring body sleeved outside the inner tube, and a plurality of fan-shaped support plates arranged uniformly along the circumferential direction outside the ring body, and the fan-shaped support plates abut against the inner wall of the inner tube.
As shown in fig. 6, the fluid simulation unit 100 may include a nitrogen generator 101, a low pressure storage tank 102 connected to the nitrogen generator 101, a compressor 103 connected to the low pressure storage tank 102, a high pressure storage tank 104 connected to the compressor 103; the high pressure tank 104 communicates with a metal hose 217. The low-pressure tank 102 is provided with a first relief valve 105, and the high-pressure tank 104 is provided with a second relief valve 106. A first switching valve 107 and a first check valve 108 are provided on a pipe connecting the compressor 103 and the high-pressure storage tank 104, and a second switching valve 109 and a flow meter 110 are provided on a pipe connecting the high-pressure storage tank 104 and the metal hose 217. Preferably, the number of the high pressure storage tanks 104 may be plural, and the plural high pressure storage tanks 104 are arranged in parallel. A first on-off valve 107 is located between the compressor 103 and a first check valve 108, and a second on-off valve 109 is located between the high-pressure storage tank 104 and a flow meter 110.
Specifically, the nitrogen generator 101 generates nitrogen gas, and the nitrogen gas flows into the low-pressure storage tank 102 for storage, then flows into the compressor 103, is pressurized by the compressor 103, and then flows through the first switching valve 107 and the first check valve 108 to enter the high-pressure storage tank 104. Then enters the metal hose 217 through the second on-off valve 109 and the flow meter 110, and is connected with the pipe column simulation unit 200. Wherein the first relief valve 105 may control the pressure in the low pressure storage tank 102 and the second relief valve 106 may control the pressure in the high pressure storage tank 104. The first and second switching valves 107 and 109 may control the flow rate of the fluid, the flow meter 110 may monitor the flow rate of the fluid in real time, and the first check valve 108 may block the flow of the fluid and prevent the reverse flow of the fluid.
As shown in fig. 3, the wellhead simulation part 500 may include a wellhead four-way 501 having a first port connected to an outlet port, a plugging member disposed on a second port of the wellhead four-way 501, a detection element disposed on a third port of the wellhead four-way 501, and a gate valve 502 disposed on a fourth port of the wellhead four-way 501; the gate valve 502 is in communication with the fluid collection unit 300.
In this embodiment, the wellhead spool 501 is supported by a spool support 503, and the gate valve 502 is supported by a gate valve support 504. The plugging member may include a connecting flange 505 provided on the second port of the wellhead spool 501, and a flange end cover 506 provided on the connecting flange 505, wherein the flange end cover 506 is used for isolating the wellhead spool 501 from the outside. The detection element can comprise various sensors, including but not limited to a temperature sensor, a pressure sensor, a sound wave sensor and the like, and the sensors transmit acquired data to the computing processing terminal through an acquisition card to realize analog detection.
As shown in fig. 7, the fluid collection unit 300 may include an air tank 301 communicating with a gate valve 502, and an exhaust pipe 302 connected to the air tank 301. The air storage tank 301 is provided with a third safety valve 303, a pipeline connecting the gate valve 502 and the air storage tank 301 is provided with a third switch valve 304 and a second check valve 305, and the exhaust pipe 302 is provided with a fourth switch valve 306.
Specifically, the fluid flows from the gate valve 502 through the second on-off valve 109 and the second check valve 305, is stored in the gas tank 301, and is finally discharged to the atmosphere through the fourth on-off valve 306. Among them, the fourth switching valve 306 and the fourth switching valve 306 can control the flow rate of the fluid, the second check valve 305 can block the flow of the fluid and prevent the reverse flow of the fluid, and the third relief valve 303 can control the pressure within the gas container 301.
The utility model discloses oil pipe leaks analog system's theory of operation in pit as follows:
the low-pressure gas generated by the nitrogen generator 101 is pressurized by the compressor 103 from the low-pressure gas tank 301 and then pumped into the high-pressure gas tank 301 for storage, and the gas in the high-pressure gas tank 104 flows into the column simulation unit 200 through the operation control system and then flows into the fluid collection unit 300 through the outlet end. In the process of gas flowing through the pipe column simulation unit 200, because pressure difference exists between the inside and the outside of the leakage hole 2051110 on the pipe wall of the inner pipe 1, the gas can leak from the inner pipe to the annular space 204 through the leakage hole 205, and the gas in the inner pipe forms stable flow by adjusting a gas source, so that the simulation of the leakage of the underground oil pipe is realized.
The utility model discloses a tubular column simulation unit 200 can control the shape of leaking hole 205, size and position, can control the height of liquid level. The fluid simulation unit 100 can control the leakage flow rate, so that the detection experiment of the leakage amount, the liquid level depth and the leakage point position can be completed.
The utility model discloses be integrated into oil pipe leakage analog system with tubular column analog unit 200, fluid analog unit 100 and fluid collection unit 300, can truly simulate operating condition and leak the form, have higher maneuverability and on-the-spot reduction degree.
The utility model discloses structural design is simple reliable, can realize the simulation that oil pipe leaked in the pit to can carry out deep research to oil pipe leakage from the aspect of theory and practice better, provide the basis to developing of oil pipe leak testing research.
It should be noted that, in the description of the present invention, the terms "first", "second", and the like are used for descriptive purposes only and for distinguishing similar objects, and no order is shown between the two, and no indication or suggestion of relative importance is understood. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
The above description is only for the embodiments of the present invention, and those skilled in the art can make various changes or modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention according to the disclosure of the application document.
Claims (10)
1. A downhole oil pipe leakage simulation system is characterized by comprising a pipe column simulation unit, a fluid simulation unit and a fluid collection unit; the pipe column simulation unit comprises a horizontal section, a bent section and a vertical section which are connected in sequence, wherein the lower end of the vertical section forms an inlet end, and the end part of the horizontal section back to the vertical section forms an outlet end; the horizontal section forms a pipe body and an annular simulation part, the bent section forms a liquid level simulation part, and the outlet end is provided with a wellhead simulation part;
the string simulation unit includes: the outer layer pipe and the inner layer pipe penetrate through the outer layer pipe; an annulus is formed between the outer layer pipe and the inner layer pipe, and a leakage hole communicated with the annulus is formed in the inner layer pipe;
the fluid simulation unit is communicated with the inlet end and is used for filling gas into the inner-layer pipe; the fluid collection unit is in communication with the wellhead simulation section for recovering gas exhausted through the inner tubular and annulus.
2. The downhole tubing leak simulation system of claim 1, wherein the outer tubing comprises: the well head simulation device comprises a horizontal section sleeve, an outer layer bent pipe connected to the end part of the horizontal section sleeve, which is opposite to the well head simulation part, a vertical section sleeve connected to the lower end of the outer layer bent pipe, and a sleeve plugging end cover arranged at the lower end of the vertical section sleeve.
3. The downhole tubing leak simulation system of claim 2, wherein the inner tubing comprises: the oil pipe comprises a horizontal section oil pipe, an outer layer bent pipe connected to the end part of the horizontal section oil pipe back to the wellhead simulation part, a vertical section oil pipe connected to the lower end of the outer layer bent pipe, and an oil pipe plugging end cover arranged at the lower end of the vertical section oil pipe.
4. The downhole tubing leak simulation system of claim 3, wherein the inner tubular further comprises: the oil pipe nipple is detachably connected between the vertical section of oil pipe and the oil pipe plugging end cover, and the leakage hole is formed in the pipe wall of the oil pipe nipple.
5. The downhole tubing leak simulation system of claim 3, wherein the tubing shutoff end cap is coupled to a metal hose, a lower end of the metal hose extending out through the casing shutoff end cap to communicate with the fluid simulation unit.
6. The downhole tubing leak simulation system of claim 5, wherein the fluid simulation unit comprises: the system comprises a nitrogen making machine, a low-pressure storage tank connected with the nitrogen making machine, a compressor connected with the low-pressure storage tank, and a high-pressure storage tank connected with the compressor; the high-pressure storage tank is communicated with the metal hose.
7. The downhole tubing leak simulation system of claim 6, wherein the low pressure storage tank is provided with a first relief valve and the high pressure storage tank is provided with a second relief valve; and a first switch valve and a first check valve are arranged on a pipeline connecting the compressor and the high-pressure storage tank, and a second switch valve and a flowmeter are arranged on a pipeline connecting the high-pressure storage tank and the metal hose.
8. The downhole tubing leak simulation system of claim 6, wherein the high pressure storage tanks are in plurality and a plurality of the high pressure storage tanks are arranged in parallel.
9. The downhole tubing leak simulation system of claim 1, wherein the wellhead simulation section comprises: the wellhead cross joint comprises a wellhead cross joint body, a plugging piece, a detection element and a gate valve, wherein the first port of the wellhead cross joint body is connected with the outlet end of the wellhead cross joint body; the gate valve is in communication with the fluid collection unit.
10. The downhole tubing leak simulation system of claim 9, wherein the fluid collection unit comprises: the gate valve is communicated with the gas storage tank; the gas storage tank is provided with a third safety valve, a pipeline connecting the gate valve and the gas storage tank is provided with a second switch valve and a second check valve, and the exhaust pipe is provided with a third switch valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021162787.9U CN213478283U (en) | 2020-06-22 | 2020-06-22 | Underground oil pipe leakage simulation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021162787.9U CN213478283U (en) | 2020-06-22 | 2020-06-22 | Underground oil pipe leakage simulation system |
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| CN213478283U true CN213478283U (en) | 2021-06-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111663916A (en) * | 2020-06-22 | 2020-09-15 | 中国海洋石油集团有限公司 | Underground oil pipe leakage simulation system |
| CN115394169A (en) * | 2022-07-27 | 2022-11-25 | 重庆大学 | A Wellbore Leak Detection Experimental Device |
-
2020
- 2020-06-22 CN CN202021162787.9U patent/CN213478283U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111663916A (en) * | 2020-06-22 | 2020-09-15 | 中国海洋石油集团有限公司 | Underground oil pipe leakage simulation system |
| CN115394169A (en) * | 2022-07-27 | 2022-11-25 | 重庆大学 | A Wellbore Leak Detection Experimental Device |
| CN115394169B (en) * | 2022-07-27 | 2024-09-27 | 重庆大学 | Shaft leakage detection experimental device |
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