Gas-liquid separation sampling device for high-gas-content oil well

Abstract

The gas-liquid separation sampling device comprises a liquid inlet valve, a reducer union, an exhaust pipe, a main pipeline, a drain valve and a sampling valve, the liquid inlet valve is in seamless connection with the reducer union, the end, away from the liquid inlet valve, of the reducer union is connected with the main pipeline, seven connectors are arranged on the main pipeline, and the drain valve is connected with the liquid inlet valve. The connector is connected with an exhaust pipe in parallel. According to the gas-liquid separation sampling device for the high-gas-content oil well, the technical bottlenecks of high sampling difficulty and low efficiency of the high-gas-content oil well for a long time are solved, and the safety of the operation process is remarkably enhanced. By effectively inhibiting the gas splashing phenomenon in the sampling process, operators are protected against potential risks, and meanwhile the cleanness and order of the sampling environment are guaranteed. The obtained sample is more authentic and representative due to the fact that gas interference is reduced, and solid data support is provided for subsequent oil gas analysis, yield evaluation and process adjustment.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil and gas field exploration and development technical field, especially relate to a gas liquid separation sampling device for high gas content oil well. BACKGROUND

[0002] In high gas content oil well, due to the high oil-gas ratio, the traditional sampling method is often difficult to separate gas and liquid effectively, resulting in low sampling efficiency, and the gas content in the sample is too high, which affects the accuracy of the analysis result. In addition, gas spatter is easy to occur in the sampling process, which not only threatens the safety of the operator, but also easily causes environmental pollution. Therefore, it is particularly important to develop a sampling device that can quickly and accurately realize gas-liquid separation while improving sampling safety and efficiency. SUMMARY

[0003] In view of the above shortcomings in the prior art, the utility model provides a gas-liquid separation sampling device for high gas content oil well, which aims to solve the problems of serious gas-liquid mixing, high sampling difficulty, sample distortion and operation safety hazards encountered in the sampling process of oil well.

[0004] In order to achieve the above-mentioned utility model purposes, the utility model adopts the technical scheme that:

[0005] A gas-liquid separation sampling device for high gas content oil well, comprising a liquid inlet valve, a reducing joint, an exhaust pipe, a main pipeline, a discharge valve and a sampling valve, the liquid inlet valve is seamlessly connected with the reducing joint, the reducing joint is connected with the main pipeline at one end away from the liquid inlet valve, the main pipeline is provided with seven interfaces, the interfaces are connected in parallel with the exhaust pipe, the main pipeline is provided with a U-shaped bend at one end away from the reducing joint, the U-shaped bend is provided with a discharge valve at the bottom, and the U-shaped bend is connected with the sampling valve at one side away from the main pipeline.

[0006] Further, the liquid inlet valve is a 1 / 2 inch needle valve.

[0007] Further, the exhaust pipe is a 3 / 4 inch instrument pipe.

[0008] Further, the discharge valve is a 1 / 2 inch needle valve.

[0009] Further, the sampling valve is a 1 / 2 inch needle valve.

[0010] Further, the exhaust pipe is a 1 / 2 inch instrument pipe

[0011] Further, the liquid inlet valve, the reducing joint, the exhaust pipe, the main pipeline, the discharge valve and the sampling valve are all made of stainless steel material.

[0012] The utility model has the advantages that:

[0013] The utility model discloses a kind of gas-liquid separation sampling devices for high gas cut oil well, solve long-term high gas cut oil well sampling difficulty, the technical bottleneck of low efficiency, also significantly enhance the safety of operation process. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is structure schematic diagram for the utility model's gas-liquid separation sampling device for high gas cut oil well.

[0015] Correspondence table of reference signs:

[0016] 1, main pipeline;2, exhaust pipe;3, reducing joint;4, liquid inlet valve;5, discharge valve;6, sampling valve. DETAILED DESCRIPTION

[0017] The specific embodiments of the utility model will be further described below in conjunction with the drawings. Wherein same parts are indicated with same reference signs.

[0018] It should be noted that the words "front", "back", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the words "inner" and "outer" refer to the directions towards or away from the geometric center of a particular component.

[0019] In order to make the content of the utility model more easily understood clearly, the technical solutions in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model.

[0020] As Figure 1 Indicated, a kind of gas-liquid separation sampling devices for high gas cut oil well, using "shallow pool" principle and energy conservation law, according to the phenomenon that fluid flows through bifurcation will appear phase separation (gas is precipitated from liquid), research and develop a kind of gas-liquid separation sampling device for high gas cut oil well.

[0021] A kind of gas-liquid separation sampling device for high gas cut oil well, including main pipeline 1, main pipeline 1 is 3 / 4 inch instrument pipe, exhaust pipe 2, exhaust pipe 2 is 1 / 2 inch instrument pipe, reducing joint 3, liquid inlet valve 4, discharge valve 5 and sampling valve 6, liquid inlet valve 4, discharge valve 5 and sampling valve 6 are all 1 / 2 inch needle valve.

[0022] Liquid inlet valve 4, reducing joint 3, exhaust pipe 2, main pipeline 1, discharge valve 5 and sampling valve 6 are all made of stainless steel material.

[0023] Start: the inlet valve 4 is directly connected to the sampling point upstream, as the starting point of the whole system.

[0024] Middle connection: the inlet valve 4 is seamlessly connected to a reducing joint 3 downstream, and the reducing joint 3 is used for adapting and connecting to the main pipeline 1.

[0025] Branching and transition: seven interfaces are arranged on the side of the main pipeline 1, which are used for connecting the exhaust pipe 2, so that the pipe diameter conversion and branching are realized. The end of the exhaust pipe 2 is bent downward to meet the gas emission and environmental protection requirements.

[0026] “U” type design: the main pipeline 1 body part adopts a “U” type design, which is convenient for installation and can change the fluid flow state to a certain extent. An exhaust valve 5 is arranged at the bottom of the U-shaped bend, which is used for discharging residual liquid after sampling.

[0027] End connection: the end of the U-shaped bend is connected with a sampling valve 6, and the downstream of the sampling valve 6 is matched with the exhaust pipe 2 again, so that the final output point of the system is formed.

[0028] The whole system realizes smooth and controllable fluid transmission from the sampling point to the final output point through the reducing joint, branching connection and “U” type pipeline layout, and meanwhile, installation convenience and operation flexibility are considered.

[0029] A new type of gas-liquid separation sampling device for a high gas content oil well, a use process of the device comprises the following steps:

[0030] S1, connecting the new type of sampling device to the sampling point of the pipeline downstream of the choke;

[0031] S2, opening the sampling valve 6 and keeping the exhaust valve 5 closed;

[0032] S3, slowly opening the inlet valve 4, and controlling the fluid flow rate to be about 0.2 m / s;

[0033] S4, sampling after the fluid at the liquid sampling port is stable;

[0034] S5, after sampling is completed, isolating the inlet valve 4, and opening the exhaust valve 5 to discharge the residual liquid in the “U” type pipe.

[0035] Screw threads are used for connecting between various instrument pipe fittings.

[0036] The gas-liquid separation sampling device for the high gas content oil well is simple in structure, can be manufactured by using conventional pipe fittings, and does not need special workpieces.

[0037] The gas-liquid separation sampling device for the high gas content oil well is small in size and extremely simple to operate.

[0038] The gas-liquid separation sampling device of the high gas content oil well has prominent safety and environmental protection performance, protects personal safety of sampling personnel, and protects the environment from pollution.

[0039] The gas-liquid separation sampling device of the high gas content oil well not only solves the technical bottleneck of high difficulty and low efficiency in sampling of the high gas content oil well for a long time, but also significantly enhances safety in an operation process. By effectively inhibiting gas spatter phenomenon during sampling, the device protects the operating personnel from potential danger, and guarantees the cleanliness and order of a sampling environment. The obtained sample is more authentic and representative due to reduced gas interference, and provides solid data support for subsequent oil and gas analysis, yield evaluation and process adjustment.

[0040] The gas-liquid separation sampling device of the high gas content oil well has remarkable effects in improving operation efficiency, guaranteeing safety and ensuring sample quality, and is very suitable for being widely popularized and applied in oil production front lines, especially in oil well facilities facing high gas content challenges. Implementation of the device undoubtedly brings a more accurate, efficient and safe sampling solution for oilfield production, and helps to comprehensively improve oilfield development and management level.

[0041] The above only describes preferred embodiments of the utility model patent, and does not limit the utility model patent, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model patent should be included in the protection scope of the utility model patent.

Claims

1. A gas-liquid separation sampling device for a high gas content oil well, characterized in that, The utility model provides a liquid inlet valve (4), reducing joint (3), exhaust pipe (2), main pipeline (1), discharge valve (5) and sampling valve (6), the liquid inlet valve (4) is connected with reducing joint (3) seamlessly, the one end of reducing joint (3) is connected with main pipeline (1) away from liquid inlet valve (4), seven interfaces are provided on main pipeline (1), the interface is connected with exhaust pipe (2) in parallel, the one side of U type bend away from main pipeline (1) of main pipeline (1) is provided with sampling valve (6) is connected with discharge valve (5) in the bottom of U type bend.

2. A gas-liquid separation and sampling device for a high gas-cut oil well according to claim 1, characterized in that: The liquid inlet valve (4) is a 1 / 2 inch needle valve.

3. A gas-liquid separation and sampling device for a high gas-cut oil well according to claim 1, characterized in that: The main pipeline (1) is a 3 / 4 inch instrument pipe.

4. A gas-liquid separation and sampling device for a high gas-cut oil well according to claim 1, characterized in that: The discharge valve (5) is a 1 / 2 inch needle valve.

5. A gas-liquid separation and sampling device for a high gas-cut oil well as claimed in claim 1, characterized in that: The sampling valve (6) is a 1 / 2 inch needle valve.

6. A gas-liquid separation and sampling device for a high gas-cut oil well as defined in claim 1, characterized in that: The exhaust pipe (2) is a 1 / 2 inch instrument pipe.

7. A gas-liquid separation and sampling device for a high gas-cut oil well as claimed in claim 1, characterized in that: The liquid inlet valve (4), reducing joint (3), exhaust pipe (2), main pipeline (1), discharge valve (5) and sampling valve (6) are all made of stainless steel.

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