Structure for sampling and detecting moisture content of crude oil pipeline

Abstract

The utility model relates to the technical field of crude oil water content detection, and discloses a crude oil conveying pipeline water content sampling detection structure which comprises a crude oil conveying pipeline body, a U-shaped sampling pipe and a flow dividing gas guide pipe are arranged at the bottom of the crude oil conveying pipeline body, and the flow dividing gas guide pipe is located on the inner side of the U-shaped sampling pipe and communicated with the U-shaped sampling pipe. According to the utility model, when crude oil is guided into the U-shaped sampling pipe, gas can be separated and guided by the shunting gas guide pipe, when the sampling detection tank samples and stores the crude oil, secondary oil-gas separation is carried out by the auxiliary gas outlet pipe, and the sampling type detection probe detects the water content of the crude oil subjected to secondary gas separation in the sampling detection tank. The water content of the crude oil subjected to primary gas separation by the U-shaped sampling pipe is detected by the in-pipe water content probe, so that a comparison type sampling detection effect is achieved, the detection precision is high, and the device has the gas separation capability, can perform comparison type sampling detection, is relatively high in detection precision, is simple in structure, is convenient to operate, and is suitable for operation and use.

Description

TECHNICAL FIELD

[0001] The utility model relates to crude oil water content detection technical field, specifically is a kind of crude oil oil pipeline water content sampling detection structure. BACKGROUND

[0002] Crude oil water content is an important parameter in petroleum exploitation, petroleum chemical industry, is the key data in oilfield production and oil product transaction, and it has important significance to the exploitation of crude oil, dehydration, storage and transportation sales and crude oil refining processing etc.;If crude oil water content detection is not accurate, it will directly cause influence to determine water well, oil layer, estimate crude oil production, predict the development life of oil well etc., in the process of oilfield exploitation, gathering and transportation, crude oil processing and refining chemical industry, the water content of crude oil in conveying pipeline needs to be determined, so water content sampling device is needed to sample and detect the water content of crude oil.

[0003] After underground crude oil exploitation, it is oil, gas, water three-phase mixture, which is typical multiphase fluid. Due to the difference in physical properties of light phase and heavy phase fluid, complex mixed fluid interfacial slip characteristics and interface effect are caused, that is, volume fraction and flow fraction are not equal, it is difficult to accurately measure its flow parameter, the existing water content sampling detection device usually detects oil, gas and water mixture, is easy to be disturbed by gas, is usually only single detection mode, cannot accurately detect the water content of crude oil, the comparative detection ability is insufficient, and the overall disassembly and operation are complex and inconvenient, and the use convenience is insufficient, therefore we propose a kind of crude oil oil pipeline water content sampling detection structure to solve the above problems. UTILITY MODEL CONTENT

[0004] (I) technical problem solved

[0005] In view of the deficiencies of prior art, the utility model provides a kind of crude oil oil pipeline water content sampling detection structure, with gas separation capacity, comparative sampling detection, higher detection precision, and simple structure, convenient operation, and the advantages such as suitable for operation and use, solve the problems of general oil-gas separation capacity of existing water content sampling detection device, insufficient detection accuracy, and insufficient disassembly and operation convenience.

[0006] (II) technical scheme

[0007] To realize the above-mentioned gas separation capacity, comparative sampling detection, higher detection precision, and simple structure, convenient operation, suitable for operation and use, the utility model provides the following technical scheme: a kind of crude oil oil pipeline water content sampling detection structure, including crude oil oil pipeline main body, the bottom of the crude oil oil pipeline main body is equipped with U-shaped sampling pipe and shunt gas guide pipe;

[0008] The shunt gas guide pipe is located in the inner side of the U-shaped sampling pipe and is communicated with the U-shaped sampling pipe, the bottom of the U-shaped sampling pipe is provided with a plurality of opening sampling pipes, the bottom of each of the plurality of opening sampling pipes is provided with a sampling preservation tank and a sampling detection tank, the bottom of the sampling detection tank is provided with a sampling type detection probe, the bottom of the side of the U-shaped sampling pipe is provided with a pipe water content probe, and the top of the sampling detection tank is provided with an auxiliary air outlet pipe.

[0009] Preferably, the crude oil pipeline main body, the U-shaped sampling pipe, the shunt gas guide pipe and the auxiliary air outlet pipe are all provided with control valves, and the other end of the auxiliary air outlet pipe is communicated with the U-shaped sampling pipe.

[0010] Preferably, the crude oil pipeline main body is provided with a sampling connection end head, the U-shaped sampling pipe and the shunt gas guide pipe are both communicated with the crude oil pipeline main body through the sampling connection end head, and the top of the U-shaped sampling pipe and the shunt gas guide pipe is respectively sealed and sleeved with a plurality of sampling connection end heads.

[0011] Preferably, the top of the crude oil pipeline main body is provided with an auxiliary dredging pipe, the auxiliary dredging pipe is communicated with the top of the crude oil pipeline main body through the sampling connection end head, the auxiliary dredging pipe is located directly above the U-shaped sampling pipe, the distance between the two ends of the auxiliary dredging pipe is greater than the distance between the two ends of the U-shaped sampling pipe, and the two ends of the auxiliary dredging pipe are both provided with opening valves.

[0012] Preferably, the U-shaped sampling pipe is connected to the bottom of the crude oil pipeline main body in a U-shaped manner, the two ends of the shunt gas guide pipe are connected to the U-shaped sampling pipe and the crude oil pipeline main body respectively, the shunt gas guide pipe is in an inclined state, and the end of the shunt gas guide pipe close to the crude oil pipeline main body is higher than the other end.

[0013] Preferably, the top of the crude oil pipeline main body is hung with a hanging semi-circular ring, the U-shaped sampling pipe is supported with a supporting semi-circular ring, the hanging semi-circular ring and the supporting semi-circular ring support each other, and a hanging connection steel cable is arranged between the hanging semi-circular ring and the supporting semi-circular ring.

[0014] Preferably, the top of the hanging connection steel cable is connected with the hanging semi-circular ring, the bottom of the supporting semi-circular ring is provided with a supporting hanging column, the bottom of the hanging connection steel cable is wound on the supporting hanging column, and the hanging connection steel cable is connected to the supporting semi-circular ring through the supporting hanging column.

[0015] Preferably, the control valve comprises a pipeline valve body, a sampling pipe valve body and a gas guide valve body, the pipeline valve body is installed on the crude oil pipeline main body, the pipeline valve body is located directly above the U-shaped sampling pipe, the sampling pipe valve body is arranged at the two ends of the U-shaped sampling pipe, the gas guide valve body is arranged at the two ends of the shunt gas guide pipe and the auxiliary air outlet pipe, and the pipeline valve body, the sampling pipe valve body and the gas guide valve body all adopt electronic valve bodies.

[0016] Preferably, the switch sampling pipe is provided with a switch valve, and the switch valve is an electric control valve.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the crude oil pipeline water content sampling detection structure has the following beneficial effects:

[0019] 1. The crude oil pipeline water content sampling detection structure can respectively control the crude oil pipeline main body and the U-shaped sampling pipe through multiple control valves, and when the crude oil is introduced into the U-shaped sampling pipe, the gas can be separated and guided by the shunt gas guide pipe, the sampling and preservation tank can sample and preserve the oil after oil-water separation, the sampling and detection tank can sample and preserve the oil while the auxiliary gas outlet pipe performs secondary auxiliary oil-gas separation, the sampling and detection probe can detect the water content of the crude oil after secondary gas separation in the auxiliary gas outlet pipe, and the in-pipe water content probe can detect the water content of the crude oil after primary gas separation in the U-shaped sampling pipe, so that the comparative sampling and detection effect is achieved, the detection precision is high, the device has the gas separation capability, the comparative sampling and detection can be achieved, and the detection precision is high.

[0020] 2. The crude oil pipeline water content sampling detection structure is manufactured by controlling the whole by a pipe body and a control valve, has a simple structure, the sampling connection end head is arranged, the U-shaped sampling pipe and the shunt gas guide pipe can be conveniently sleeved and installed on the sampling connection end head, so that the crude oil pipeline main body is stably connected, the installation operation is simple and convenient, the device has a simple structure and is convenient and suitable for operation and use. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a front view of the structure of the utility model;

[0022] Figure 2 It is a front view of the structure of the utility model;

[0023] Figure 3 It is a front view of the structure of the utility model;

[0024] Figure 4 It is a front view of the structure of the utility model.

[0025] In the figure: 1, the crude oil pipeline main body; 2, U-shaped sampling pipe; 3, shunt gas guide pipe; 4, switch sampling pipe; 5, sampling storage tank; 6, sampling detection tank; 7, sampling type detection probe; 8, in-pipe water content probe; 9, auxiliary air outlet pipe; 10, control valve; 101, oil pipeline valve body; 102, sampling pipe valve body; 103, gas guide valve body; 11, sampling connection end; 12, auxiliary dredging pipe; 13, on-off valve; 14, mounting semicircle ring; 15, supporting semicircle ring; 16, mounting connection steel cable; 17, supporting mounting column. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0027] Please refer to Figures 1-4 A crude oil pipeline water content sampling and detection structure, comprising a crude oil pipeline main body 1, and the bottom of the crude oil pipeline main body 1 is provided with a U-shaped sampling pipe 2 and a shunt gas guide pipe 3.

[0028] The shunt gas guide pipe 3 is located on the inner side of the U-shaped sampling pipe 2 and is connected thereto, the bottom of the U-shaped sampling pipe 2 is provided with a plurality of switch sampling pipes 4, the bottom of each of the plurality of switch sampling pipes 4 is provided with a sampling storage tank 5 and a sampling detection tank 6, the bottom of the sampling detection tank 6 is provided with a sampling type detection probe 7, the bottom of the side of the U-shaped sampling pipe 2 is provided with an in-pipe water content probe 8, and the top end of the sampling detection tank 6 is provided with an auxiliary air outlet pipe 9.

[0029] Among them, the crude oil pipeline main body 1, the U-shaped sampling pipe 2, the shunt gas guide pipe 3 and the auxiliary air outlet pipe 9 are all provided with control valves 10, and the other end of the auxiliary air outlet pipe 9 is connected to the U-shaped sampling pipe 2.

[0030] The beneficial effects expressed in the scheme are: through the multiple control valves 10, the crude oil conveying pipe main body 1 and the U-shaped sampling pipe 2 can be respectively controlled to switch and guide flow; when the crude oil is introduced into the U-shaped sampling pipe 2, the gas can be separated and guided by the shunt gas guide pipe 3; the sampling and preservation tank 5 can sample and preserve the oil after oil-water separation; the sampling and detection tank 6 is preserved while being sampled, and the secondary auxiliary oil-gas separation is performed by the auxiliary gas outlet pipe 9; the sampling and detection probe 7 detects the water content of the crude oil after the secondary gas separation in the sampling and detection tank 6; the in-pipe water content probe 8 detects the water content of the crude oil after the primary gas separation in the U-shaped sampling pipe 2, which has a comparative sampling and detection effect, high detection accuracy, the U-shaped sampling pipe 2 and the shunt gas guide pipe 3 can be conveniently sleeved and installed on the sampling connection end 11, stably connected with the crude oil conveying pipe main body 1, and the installation operation is relatively simple and convenient, so that the device has the gas separation capability, the comparative sampling and detection, high detection accuracy, simple structure, convenient operation, and is suitable for operation and use.

[0031] Further, the sampling connection end 11 is installed on the crude oil conveying pipe main body 1, the U-shaped sampling pipe 2 and the shunt gas guide pipe 3 are connected with the crude oil conveying pipe main body 1 through the sampling connection end 11, and the top ends of the U-shaped sampling pipe 2 and the shunt gas guide pipe 3 are respectively sealed and sleeved with the multiple sampling connection ends 11;

[0032] By being provided with the sampling connection end 11, the U-shaped sampling pipe 2 and the shunt gas guide pipe 3 can be conveniently sleeved and installed on the sampling connection end 11, so as to be stably connected with the crude oil conveying pipe main body 1, and the installation operation is relatively simple and convenient.

[0033] Further, the top of the crude oil conveying pipe main body 1 is provided with an auxiliary dredging pipe 12, the auxiliary dredging pipe 12 is connected with the top of the crude oil conveying pipe main body 1 through the sampling connection end 11, the auxiliary dredging pipe 12 is located directly above the U-shaped sampling pipe 2, the distance between the two ends of the auxiliary dredging pipe 12 is greater than the distance between the two ends of the U-shaped sampling pipe 2, and the two ends of the auxiliary dredging pipe 12 are respectively provided with switch valves 13;

[0034] By setting the auxiliary dredging pipe 12, when the crude oil conveying pipe main body 1 is blocked to a certain extent, the auxiliary dredging pipe 12 can assist in guiding the flow of oil, and when the U-shaped sampling pipe 2 is blocked, the auxiliary dredging pipe 12 can assist in conveying crude oil, and the switch valves 13 play a switching output role for the auxiliary dredging pipe 12, which has excellent practicability.

[0035] Further, the U-shaped sampling pipe 2 is connected in a U shape at the bottom of the crude oil conveying pipe main body 1, the two ends of the shunt gas guide pipe 3 are respectively connected to the U-shaped sampling pipe 2 and the crude oil conveying pipe main body 1, the shunt gas guide pipe 3 is inclined, and the end of the shunt gas guide pipe 3 close to the crude oil conveying pipe main body 1 is higher than the other end;

[0036] By setting the U-shaped sampling pipe 2 in a U shape, the oil flow is stable and not easy to be blocked, and the gas flow is stable and not easy to be blocked.

[0037] Further, the top of the crude oil pipeline body 1 is provided with a mounting semi-circular ring 14, the U-shaped sampling pipe 2 is provided with a supporting semi-circular ring 15, the mounting semi-circular ring 14 and the supporting semi-circular ring 15 are mutually supported and corresponded, and the mounting semi-circular ring 14 and the supporting semi-circular ring 15 are provided with a mounting connecting steel cable 16.

[0038] By setting the mounting semi-circular ring 14, the supporting semi-circular ring 15 and the mounting connecting steel cable 16, the mounting semi-circular ring 14 and the supporting semi-circular ring 15 can be mounted on the crude oil pipeline body 1 and the U-shaped sampling pipe 2 respectively, and are connected by the mounting connecting steel cable 16, so as to stably reinforce and support the U-shaped sampling pipe 2, and stably mount the U-shaped sampling pipe 2 on the crude oil pipeline body 1, thereby achieving stable mounting and excellent fastening adaptability.

[0039] Further, the top end of the mounting connecting steel cable 16 is connected with the mounting semi-circular ring 14, the bottom of the supporting semi-circular ring 15 is provided with a supporting mounting column 17, and the bottom of the mounting connecting steel cable 16 is wound on the supporting mounting column 17, and the mounting connecting steel cable 16 is connected with the supporting semi-circular ring 15 by the supporting mounting column 17.

[0040] By setting the supporting mounting column 17, the mounting connecting steel cable 16 can be connected with the supporting semi-circular ring 15 by the supporting mounting column 17, which is convenient to connect and disassemble and has good adaptability.

[0041] Further, the control valve 10 comprises an oil pipeline valve body 101, a sampling pipe valve body 102 and a gas valve body 103, the oil pipeline valve body 101 is mounted on the crude oil pipeline body 1, the oil pipeline valve body 101 is located directly above the U-shaped sampling pipe 2, the sampling pipe valve body 102 is arranged at both ends of the U-shaped sampling pipe 2, and the gas valve body 103 is arranged at both ends of the shunt gas pipe 3 and the auxiliary gas outlet pipe 9, and the oil pipeline valve body 101, the sampling pipe valve body 102 and the gas valve body 103 all adopt electronic valve bodies.

[0042] By setting the control valve 10 comprising the oil pipeline valve body 101, the sampling pipe valve body 102 and the gas valve body 103, the oil pipeline valve body 101 is mounted on the crude oil pipeline body 1, the sampling pipe valve body 102 is arranged on the U-shaped sampling pipe 2, and the gas valve body 103 is arranged at both ends of the shunt gas pipe 3 and the auxiliary gas outlet pipe 9, which has excellent installation adaptability, so that the oil pipeline valve body 101, the sampling pipe valve body 102 and the gas valve body 103 can respectively operate and work on the crude oil pipeline body 1, the U-shaped sampling pipe 2, the shunt gas pipe 3 and the auxiliary gas outlet pipe 9, thereby achieving excellent adaptability.

[0043] Further, the switch sampling pipe 4 is provided with a switch valve, which is an electric control valve.

[0044] By setting the switch valve as an electric control valve, the switch sampling pipe 4 can be controlled to switch and adapt, so that the oil sampling of the sampling preservation tank 5 and the sampling detection tank 6 is convenient and stable, and has good adaptability.

[0045] It should be noted that the devices in the present application are common market devices, which can be selected according to the needs during specific use, and the circuit connection relationship of each device is a simple series and parallel connection circuit, which does not have an innovation point in circuit connection, and can be easily realized by those skilled in the art, which belongs to the prior art and will not be described in detail.

[0046] Working principle: the U-shaped sampling pipe 2 and the shunt gas guide pipe 3 are arranged at the bottom of the crude oil conveying pipe body 1, and the crude oil conveying pipe body 1, the U-shaped sampling pipe 2, the shunt gas guide pipe 3 and the auxiliary gas outlet pipe 9 are respectively controlled by a plurality of control valves 10.

[0047] The crude oil conveying pipe body 1 and the U-shaped sampling pipe 2 can be controlled by the plurality of control valves 10 to switch and guide, and the normal oil liquid guiding and flowing state is achieved, the crude oil is guided and flowed through the crude oil conveying pipe body 1, when the water content of the crude oil needs to be sampled and detected, the crude oil conveying pipe body 1 is closed, the U-shaped sampling pipe 2 and the shunt gas guide pipe 3 are opened, the crude oil is guided into the U-shaped sampling pipe 2, and sampling type guiding operation is performed, in the crude oil guiding process, the gas can be separated and guided through the shunt gas guide pipe 3, the crude oil is subjected to oil-gas separation operation, the accuracy of sampling and detection is increased, the U-shaped sampling pipe 2 is provided with a plurality of switch sampling pipes 4, which can be connected with a sampling preservation tank 5 and a sampling detection tank 6, the sampling preservation tank 5 can sample and preserve the oil separated from water, the sampling detection tank 6 is subjected to secondary auxiliary oil-gas separation through the auxiliary gas outlet pipe 9, the oil-gas separation effect is excellent, the water content of the crude oil subjected to secondary gas separation is detected by a sampling type detection probe 7, and the water content of the crude oil subjected to primary gas separation in the U-shaped sampling pipe 2 is detected by a pipe water content probe 8, so that the contrast type sampling and detection effect is achieved on the basis of gas separation, and the detection precision is high.

[0048] The whole is controlled and manufactured by the pipe body and the control valve 10, the structure is simple, the sampling connection end 11 is arranged, the U-shaped sampling pipe 2 and the shunt gas guide pipe 3 can be conveniently sleeved and installed on the sampling connection end 11, so as to be stably connected with the crude oil conveying pipe body 1, the installation operation is simple and convenient, the device has the gas separation capability, the contrast type sampling and detection can be achieved, the detection precision is high, the structure is simple, the operation is convenient, and the device is suitable for operation and use, and solves the problems of general oil-gas separation capability of the existing water content sampling and detection device, insufficient detection accuracy, and insufficient disassembly and operation convenience.

[0049] It is to be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0050] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A water content sampling and detecting structure for crude oil pipeline, comprising a crude oil pipeline main body (1), characterized in that: The bottom of the crude oil pipeline body (1) is provided with a U-shaped sampling pipe (2) and a shunt gas guide pipe (3); The shunt gas guide pipe (3) is located on the inner side of the U-shaped sampling pipe (2) and is in communication therewith, the bottom of the U-shaped sampling pipe (2) is provided with a plurality of switch sampling pipes (4), the bottom of each of the plurality of switch sampling pipes (4) is provided with a sampling preservation tank (5) and a sampling detection tank (6), the bottom of the sampling detection tank (6) is provided with a sampling type detection probe (7), the bottom of the side of the U-shaped sampling pipe (2) is provided with a pipe water content probe (8), and the top end of the sampling detection tank (6) is provided with an auxiliary gas outlet pipe (9). The crude oil pipeline body (1), the U-shaped sampling pipe (2), the shunt gas guide pipe (3) and the auxiliary gas outlet pipe (9) are all provided with control valves (10), and the other end of the auxiliary gas outlet pipe (9) is in communication with the U-shaped sampling pipe (2).

2. The water cut sampling and detecting structure for crude oil pipeline according to claim 1, characterized in that: The crude oil pipeline body (1) is provided with a sampling connection end head (11), the U-shaped sampling pipe (2) and the shunt gas guide pipe (3) are both in communication with the crude oil pipeline body (1) through the sampling connection end head (11), and the top ends of the U-shaped sampling pipe (2) and the shunt gas guide pipe (3) are respectively sealed and sleeved with a plurality of sampling connection end heads (11).

3. The water cut sampling and detecting structure for crude oil pipeline according to claim 2, characterized in that: The top of the crude oil pipeline body (1) is provided with an auxiliary dredging pipe (12), the auxiliary dredging pipe (12) is communicated with the top of the crude oil pipeline body (1) through the sampling connection end head (11), the auxiliary dredging pipe (12) is located directly above the U-shaped sampling pipe (2), the distance between the two ends of the auxiliary dredging pipe (12) is greater than the distance between the two ends of the U-shaped sampling pipe (2), and the two ends of the auxiliary dredging pipe (12) are both provided with switch valves (13).

4. The water cut sampling and detecting structure for crude oil pipeline of claim 1, wherein: The U-shaped sampling pipe (2) is connected to the bottom of the crude oil pipeline body (1) in a U-shaped manner, the two ends of the shunt gas guide pipe (3) are connected to the U-shaped sampling pipe (2) and the crude oil pipeline body (1) respectively, the shunt gas guide pipe (3) is inclined, and the end of the shunt gas guide pipe (3) close to the crude oil pipeline body (1) is higher than the other end.

5. The water cut sampling and detecting structure for crude oil pipeline of claim 1, wherein: The top of the crude oil pipeline body (1) is hung with a hanging semi-circular ring (14), the U-shaped sampling pipe (2) is supported with a supporting semi-circular ring (15), the hanging semi-circular ring (14) and the supporting semi-circular ring (15) support each other correspondingly, and a hanging connection steel cable (16) is arranged between the hanging semi-circular ring (14) and the supporting semi-circular ring (15).

6. The water cut sampling and detecting structure for crude oil pipeline of claim 5, wherein: The top end of the hanging connection steel cable (16) is connected with the hanging semi-circular ring (14), the bottom of the supporting semi-circular ring (15) is provided with a supporting hanging column (17), the bottom of the hanging connection steel cable (16) is wound on the supporting hanging column (17), and the hanging connection steel cable (16) is connected to the supporting semi-circular ring (15) through the supporting hanging column (17).

7. The water cut sampling and detecting structure for crude oil pipeline of claim 1, wherein: The control valve (10) comprises an oil pipeline valve body (101), a sampling pipeline valve body (102) and a gas guide valve body (103), the oil pipeline valve body (101) is installed on the crude oil pipeline body (1), the oil pipeline valve body (101) is located directly above the U-shaped sampling pipeline (2), the sampling pipeline valve body (102) is arranged at both ends of the U-shaped sampling pipeline (2), the gas guide valve body (103) is arranged at both ends of the shunt gas guide pipeline (3) and the auxiliary gas outlet pipeline (9), and the oil pipeline valve body (101), the sampling pipeline valve body (102) and the gas guide valve body (103) are all electronic valve bodies.

8. The water cut sampling and detecting structure for crude oil pipeline of claim 1, wherein: The switch sampling pipeline (4) is provided with a switch valve, and the switch valve is an electric control valve.

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