Integrated device for oil testing automatic metering and gas-liquid branch output

Abstract

The invention discloses an oil testing automatic metering and gas-liquid branch output integrated device which comprises a prying body, three tank bodies are fixedly arranged on the prying body, the upper ends of the first tank body and the second tank body are connected through a communicating pipe, and upper inlets of the two tank bodies are connected with ports in the two sides of a first electric three-way valve respectively. Oil well incoming liquid is connected with a water content analyzer through a liquid inlet connecting pipe, an outlet of the water content analyzer is connected with a middle port of a first electric three-way valve, lower outlets of the first tank body and the second tank body are connected with two side ports of a second electric three-way valve respectively, and a middle port of the second electric three-way valve is connected with an inlet of a third tank body. And the third tank body is used for outputting gas and liquid in different paths. According to the invention, the oil testing automatic metering and the gas-liquid branch output are integrated, the whole operation is automatically controlled, the oil testing metering ground process is simplified, the gas separation is thorough, and the gas metering is more accurate.

Description

Technical Field

[0001] The invention relates to oil development equipment, in particular to an integrated device for automatic oil testing metering and gas-liquid branch output. Background Art

[0002] Oil testing is a term used exclusively for oil well exploration or newly drilled oil wells, which is different from conventional oil well production. Oil testing is the ground testing and control process during the oil well blowout and drainage process after the drilling and fracturing of a new oil well is completed, thereby determining the subsequent stable production of the oil well or the block. At present, all the outlets of oil well metering devices are gas-liquid mixed outputs, but in oil testing, the gas-liquid path needs to be branched, that is, the liquid path enters the pipeline or the storage tank, and the gas path needs to be discharged through combustion. At this time, the pressures of the two paths are completely different. Therefore, conventional oil well metering devices are not applicable in oil testing. The prior art is to add a set of gas-liquid separators at the rear end of the oil well metering device to achieve gas and liquid path separation. This method has two disadvantages: 1. The ground pipeline process is complicated, the floor space is large, and many people are occupied. In addition, the two devices are not linked. The operation of the rear-end gas-liquid separator will cause pipeline pressure fluctuations, thereby causing the front-end oil well metering device to fail or malfunction; 2. In the liquid-gas metering of the front-end oil well metering device, the gas separation effect is poor, and the gas metering is actually inaccurate. In view of the above problems, an integrated device of automatic metering and gas-liquid branch output for oil testing is proposed. Summary of the invention

[0003] The purpose of the present invention is to provide an integrated device for automatic oil test metering and gas-liquid branch output to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an integrated device for automatic oil test metering and gas-liquid branch output, comprising a skid, on which a first tank, a second tank and a third tank are fixedly arranged, the upper ends of the first tank and the second tank are respectively connected to the two ends of a connecting pipe, the upper inlets of the first tank and the second tank are respectively connected to the two end inlets of a first electric three-way valve, the middle port of the first electric three-way valve is connected to the outlet of a water analyzer, and the inlet of the water analyzer is connected to a liquid inlet pipe; The lower outlets of the first tank body and the second tank body are respectively connected to the two side ports of the second electric three-way valve, and the middle port of the second electric three-way valve is connected to the inlet of the third tank body.

[0005] As a preferred technical solution of the present invention, the side walls of the first tank body, the second tank body and the third tank body are respectively connected to the first differential pressure transmitter, the second differential pressure transmitter and the third differential pressure transmitter, and the first differential pressure transmitter, the second differential pressure transmitter, the third differential pressure transmitter, the first electric three-way valve, the water content analyzer and the second electric three-way valve are all connected to the automatic control box through cables.

[0006] As a preferred technical solution of the present invention, the top of the third tank body is connected to one end of a gas output pipe, and a gas flow meter, a first electric regulating valve and a first common valve are sequentially arranged on the gas output pipe.

[0007] As a preferred technical solution of the present invention, the lower liquid outlet of the third tank body is connected to one end of the liquid output pipe, a second electric regulating valve is provided on the liquid output pipe, a second ordinary valve is installed between the gas output pipe and the liquid output pipe, and the gas flow meter, the first electric regulating valve and the second electric regulating valve are also connected to the automatic control box through cables.

[0008] Compared with the prior art, the present invention has the following beneficial effects: The present invention integrates the automatic metering of oil test with the gas-liquid branch output, and the overall automatic control operation is suitable for the application of closed pipeline transportation of oil test, simplifies the ground process of oil test metering, and has thorough gas separation and more accurate gas metering. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 The figure is a block diagram of the operating principle of the present invention.

[0010] In the figure: 1, liquid inlet pipe; 2, water content analyzer; 3, first tank body; 4, first differential pressure transmitter; 5, connecting pipe; 6, first electric three-way valve; 7, second electric three-way valve; 8, second tank body; 9, second differential pressure transmitter; 10, third tank body; 11, third differential pressure transmitter; 12, gas flow meter; 13, first electric regulating valve; 14, automatic control box; 15, first common valve; 16, gas output pipe; 17, second common valve; 18, second electric regulating valve; 19, liquid output pipe; 20, skid body. DETAILED DESCRIPTION

[0011] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0012] See also Figure 1The present invention provides a technical solution of an integrated device for automatic oil test metering and gas-liquid branch output: comprising a skid body 20, on which a first tank body 3, a second tank body 8 and a third tank body 10 are fixedly arranged, the upper ends of the first tank body 3 and the second tank body 8 are respectively connected to the two ends of a connecting pipe 5, the upper inlets of the first tank body 3 and the second tank body 8 are respectively connected to the two end inlets of a first electric three-way valve 6, the middle port of the first electric three-way valve 6 is connected to the outlet of a water analyzer 2, the inlet of the water analyzer 2 is connected to a liquid inlet pipe 1, the liquid-gas mixture produced by the oil well enters the water analyzer 2 through the liquid inlet pipe 1, and the water content of the oil well mixture is measured by the water analyzer 2; The lower outlets of the first tank body 3 and the second tank body 8 are respectively connected to the two side ports of the second electric three-way valve 7, and the middle port of the second electric three-way valve 7 is connected to the inlet of the third tank body 10. The first electric three-way valve 6 and the second electric three-way valve 7 are both L-type three-way valves. The conduction switching between the middle port and the two side ports of the three-way valve is achieved by rotating the electric valve. Therefore, the first tank body 3 and the second tank body 8 form a liquid metering tank.

[0013] The side walls of the first tank body 3, the second tank body 8 and the third tank body 10 are connected to the first differential pressure transmitter 4, the second differential pressure transmitter 9 and the third differential pressure transmitter 11 respectively. When working, the first differential pressure transmitter 4, the second differential pressure transmitter 9 and the third differential pressure transmitter 11 are used to measure the liquid volume in the first tank body 3, the second tank body 8 and the third tank body 10 respectively, thereby using the values ​​measured by the first differential pressure transmitter 4 and the second differential pressure transmitter 9 to realize the conduction switching of the first electric three-way valve 6 and the second electric three-way valve 7, and according to the measurement signal of the third differential pressure transmitter 11, the control The actions of the first electric regulating valve 13 and the second electric regulating valve 18 are controlled to maintain a certain amount of liquid storage in the third tank 10, so that the gas and liquid are completely separated. The first differential pressure transmitter 4, the second differential pressure transmitter 9, the third differential pressure transmitter 11, the first electric three-way valve 6, the water content analyzer 2 and the second electric three-way valve 7 are all connected to the automatic control box 14 through cables. When working, the automatic control box 14 collects signals, calculates liquid flow, and controls the actions of the first electric three-way valve 6, the second electric three-way valve 7, the first electric regulating valve 13, and the second electric regulating valve 18.

[0014] The top of the third tank body 10 is connected to one end of a gas output pipe 16, on which a gas flow meter 12, a first electric regulating valve 13 and a first common valve 15 are sequentially arranged. The gas output pipe 16, the gas flow meter 12, the first electric regulating valve 13 and the first common valve 15 connected to the gas outlet at the top of the third tank body 10 form a gas circuit.

[0015] The lower liquid outlet of the third tank body 10 is connected to one end of the liquid output pipe 19, and a second electric regulating valve 18 is arranged on the liquid output pipe 19. A second common valve 17 is installed between the gas output pipe 16 and the liquid output pipe 19. The gas flow meter 12, the first electric regulating valve 13 and the second electric regulating valve 18 are also connected to the automatic control box 14 through cables. During operation, the automatic control box 14 collects the signal of the gas flow meter 12 and calculates the gas flow. The liquid output pipe 19 and the second electric regulating valve 18 connected to the lower liquid outlet of the third tank body 10 form a liquid circuit. The gas circuit and the liquid circuit are connected by the second common valve 17 and a pipeline to form a bypass of the gas circuit. By controlling the first electric regulating valve 13 and the second electric regulating valve 18, the gas and liquid output from the third tank body 10 are kept completely branched. By operating the opening and closing of the first common valve 15 and the second common valve 17, the branched gas and liquid can also be output from the liquid circuit in parallel.

[0016] The working principle of the present invention is: The liquid-gas mixture produced by the oil well enters the water analyzer 2 through the liquid inlet pipe 1, and the water content of the oil well mixture is measured by the water analyzer 2. After passing through the water analyzer 2, the oil well liquid-gas mixture enters the first electric three-way valve 6. Under the control of the automatic control box 14, the first electric three-way valve 6 guides the liquid-gas mixture from the oil well to the first tank body 3. The second electric three-way valve 7, under the control of the automatic control box 14, acts in the opposite direction to the first electric three-way valve 6, closes the outlet of the first tank body 3, and connects the outlet of the second tank body 8. Liquid and gas enter the first tank body 3, and the liquid accumulates and is stored in the first tank body 3. The gas enters the second tank body 8 through the top connecting pipe 5, and is discharged through its outlet and the second electric three-way valve 7. The first differential pressure transmitter 4 measures the liquid storage amount in the first tank body 3 in real time, and the signal is transmitted to the automatic control box 14 to realize the measurement of the liquid inflow amount of the first tank body 3; After the liquid storage volume of the first tank body 3 reaches a certain value, the automatic control box 14 controls the first electric three-way valve 6 and the second electric three-way valve 7 to switch, the first electric three-way valve 6 connects the inlet of the second tank body 8 and closes the inlet of the first tank body 3 at the same time, the second electric three-way valve 7 connects the outlet of the first tank body 3 and closes the outlet of the second tank body 8 at the same time, the second tank body 8 starts to take in liquid and store liquid, the second differential pressure transmitter 9 measures the liquid storage volume in the second tank body 8, the gas enters the first tank body 3 through the top connecting pipe 5, and forces the liquid in the first tank body 3 to be discharged through its outlet and the second electric three-way valve 7; After the liquid storage volume of the second tank body 8 reaches a certain value, under the control of the automatic control box 14, the first electric three-way valve 6 and the second electric three-way valve 7 are switched, and the first tank body 3 starts to fill with liquid and store liquid, and the second tank body 8 is emptied. Thus, through the repeated storage and discharge of liquid in the first tank body 3 and the second tank body 8, the liquid volume of the oil well is continuously measured, and the oil well mixed liquid enters the third tank body 10, and the third tank body 10 separates the oil well liquid and gas again, and the first common valve 15 is opened to allow the gas to be discharged through the gas output pipe 16, and the gas flow meter 12 is used to measure the gas production when the gas is discharged, and the first electric regulating valve 13 is used to control the gas output.

[0017] In the description of the present invention, it is necessary to understand that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0018] In the present invention, unless otherwise clearly stipulated and limited, for example, it can be a fixed connection, a detachable connection, or an integrated one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0019] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An integrated device for automatic oil test metering and gas-liquid split output, comprising a skid (20), characterized in that: The skid body (20) is fixedly provided with a first tank body (3), a second tank body (8) and a third tank body (10); the upper ends of the first tank body (3) and the second tank body (8) are respectively connected to the two ends of the connecting pipe (5); the upper inlets of the first tank body (3) and the second tank body (8) are respectively connected to the two end inlets of the first electric three-way valve (6); the middle port of the first electric three-way valve (6) is connected to the outlet of the water content analyzer (2); and the inlet of the water content analyzer (2) is connected to the liquid inlet pipe (1); The lower outlets of the first tank body (3) and the second tank body (8) are respectively connected to the two side ports of the second electric three-way valve (7), and the middle port of the second electric three-way valve (7) is connected to the inlet of the third tank body (10).

2. The integrated device for automatic oil test metering and gas-liquid branch output according to claim 1 is characterized by: The side walls of the first tank body (3), the second tank body (8) and the third tank body (10) are respectively connected to the first differential pressure transmitter (4), the second differential pressure transmitter (9) and the third differential pressure transmitter (11); the first differential pressure transmitter (4), the second differential pressure transmitter (9), the third differential pressure transmitter (11), the first electric three-way valve (6), the water content analyzer (2) and the second electric three-way valve (7) are all connected to the automatic control box (14) via cables.

3. The integrated device for automatic oil test metering and gas-liquid branch output according to claim 2 is characterized by: The top of the third tank body (10) is connected to one end of a gas output pipe (16), and a gas flow meter (12), a first electric regulating valve (13) and a first common valve (15) are sequentially arranged on the gas output pipe (16).

4. The integrated device for automatic oil test metering and gas-liquid branch output according to claim 3 is characterized by: The lower liquid outlet of the third tank body (10) is connected to one end of a liquid output pipe (19), a second electric regulating valve (18) is provided on the liquid output pipe (19), a second common valve (17) is installed between the gas output pipe (16) and the liquid output pipe (19), and the gas flow meter (12), the first electric regulating valve (13) and the second electric regulating valve (18) are also connected to the automatic control box (14) via cables.

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