Multifunctional metering device for well group

Abstract

The utility model discloses a multifunctional metering device for a well group, which relates to the technical field of oil field metering and adopts the technical scheme that the multifunctional metering device comprises a multi-way valve with two output ports and a plurality of liquid inlets, a primary separator, a secondary separator, a gas flowmeter and a liquid flowmeter, one output port of the multi-way valve is communicated with the first-stage separator through a separation pipeline, the other output port of the multi-way valve is communicated with a mixed liquid output pipe through a liquid collecting pipe, and a liquid inlet of the multi-way valve is communicated with a single well through a metering pipeline; the first-stage separator and the second-stage separator are communicated through a gas collecting pipe and a liquid pipe, the gas collecting pipe is located above the liquid pipe, an exhaust pipe is arranged on the upper portion of the second-stage separator, a liquid discharging pipe is arranged on the lower portion of the second-stage separator, and the exhaust pipe and the liquid discharging pipe are both communicated with a mixed liquid output pipe. The device disclosed by the utility model has the beneficial effects that cyclone separation and gravity separation are combined, so that the separation effect and the measurement accuracy of the device are improved, and the reliability and the stability of the device are ensured; gas metering, liquid metering and sampling of a single well can be achieved at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of oil field metering, in particular to a multifunctional metering device for a well group. Background Art

[0002] Accurate measurement of oil, gas and water production in oil field wells is an important guarantee for understanding oil well production dynamics, analyzing reservoir changes, and scientifically formulating oil field development plans.

[0003] At present, the power diagram measurement is the main means of measuring and analyzing the production of oil wells. Compared with the traditional two-phase separator measurement, weighing measurement, cyclone separator measurement, etc., the power diagram measurement simplifies the ground process and truly realizes "one-to-one". It can measure continuously and uninterruptedly, with low cost and easy maintenance. The accuracy of power diagram measurement is affected by many factors and large errors. The power diagram correction coefficient needs to be recalibrated after the production conditions of the same oil well change. In order to ensure the measurement accuracy of the power diagram measurement, the management area uses a mobile calibration vehicle to manually calibrate and correct the power diagram measurement data.

[0004] However, there are problems with the applicability of power diagram metering in production applications. The data collection and communication of load sensors and displacement sensors are unstable; the same liquid volume calculation model is used for different working conditions, and the maximum metering error can reach more than 10%; power diagram metering cannot measure gas volume. In addition, 2-3 people are required to operate the equipment on site to calibrate the power diagram data of the standard production vehicle, and only single well comparison tests can be performed, which is inefficient. Utility Model Content

[0005] The utility model aims to provide a multifunctional metering device for a well group.

[0006] The utility model is realized by the following measures: a multifunctional metering device for a well group, characterized in that it comprises a multi-way valve with two output ports and a plurality of liquid inlets, a primary separator, a secondary separator, a gas flow meter and a liquid flow meter;

[0007] One of the output ports of the multi-way valve is connected to the primary separator through a separation pipeline, the other output port is connected to the mixed liquid external transmission pipeline through a liquid collecting pipe, and the liquid inlet is connected to a single well through a metering pipeline;

[0008] The primary separator and the secondary separator are connected via an air collecting pipe and a liquid pipe. The air collecting pipe is located above the liquid pipe. The secondary separator is provided with an exhaust pipe at the top and a drain pipe at the bottom. Both the exhaust pipe and the drain pipe are connected to the mixed liquid external transmission pipe.

[0009] The multi-way valve can be selected according to actual conditions. A multi-way valve with eight single-well liquid inlets and two outlets can be selected, with one outlet serving as a metering outlet and the other outlet serving as a gathering outlet.

[0010] When the multi-way valve is working normally, the valve drive device drives the rotating valve core to make circular motion. The liquid from one of the eight single-well liquid inlets passes through the rotating valve core and is output from the metering port. The liquid from the other seven single-well liquid inlets is collected in the valve body cavity and output from the gathering port. The function of the valve drive device is to automatically select the liquid from a single-well liquid inlet to enter the rotating valve core and output from the metering port to achieve the function of measuring the single-well production and sampling. You can also manually rotate the handwheel on the valve drive device to select the liquid from a single-well liquid pipeline to achieve the function of measuring the single-well production and sampling.

[0011] The primary separator is mainly used to separate free gas, and the secondary separator is mainly used to separate bubbles. The combined use of multiple separation technologies can improve the separation effect and make the gas-liquid separation more thorough and efficient.

[0012] The separation pipeline extends to the upper middle part of the tank body of the primary separator.

[0013] The top end of the separation pipe is expanded.

[0014] The crude oil liquid from the oil well flows upward from the separation pipeline through the bottom of the tank body of the first-stage separator into the tank. The separation pipeline extends to the upper middle part of the tank body to increase the sedimentation time. The top of the separation pipeline is expanded, and the crude oil liquid is dispersed and gushed out from bottom to top under the drive of the incoming liquid pressure. In this process, part of the gas in the crude oil liquid is separated and gathered at the top of the tank body to enter the gas collection pipeline, and the remaining mixed liquid flows out from the bottom and enters the second-stage separator for secondary separation.

[0015] Working principle: When the multi-way valve is working normally, the valve drive device drives the rotating valve core to make circular motion. The liquid from one of the eight single-well liquid inlets passes through the rotating valve core and is output from the metering port. The liquid from the other seven single-well liquid inlets is collected in the valve body cavity and output from the gathering port. The single-well liquid output from the metering port passes through the separation pipeline and is first pre-separated by the first-stage separator, then enters the second-stage separator for fine separation, and then is measured by the gas flowmeter and mass flowmeter for gas phase and liquid phase respectively. After measurement, the oil and gas are mixed and then pass through the mixed liquid external transmission pipeline to enter the normal production process.

[0016] The exhaust pipe and the liquid discharge pipe are connected to the mixed liquid external delivery pipe through a collecting pipe. The collecting pipe and the separation pipeline are connected through an intermediate pipeline, and a manual ball valve is arranged on the intermediate pipeline.

[0017] All the metering pipelines are connected to the mixed liquid external delivery pipeline through branch pipes, and control valves are arranged on the branch pipes.

[0018] The mixed liquid external delivery pipe, the separation pipe and the collecting pipe are all provided with control valves.

[0019] The exhaust pipe is provided with a regulating valve, and the liquid discharge pipe is provided with a check valve.

[0020] The secondary separator is provided with a differential pressure level meter and a sound differential level switch.

[0021] The secondary separator is provided with a spiral column inside. Based on the gas-liquid cyclone separation principle, a cyclone is formed by the spiral column. The centrifugal force generated by the cyclone separates the liquid from the mixed fluid, and then the liquid level in the tank is controlled by a liquid level switch to achieve the purpose of liquid-gas separation.

[0022] It also includes a bracket, which includes a bottom frame. The secondary separator is fixed to the bottom frame through a support seat, and the mixed liquid external transmission pipe is fixed to the bottom frame through a plurality of support columns and pipe clamps. A plurality of lifting ears are arranged on the top frame of the bracket.

[0023] The bottom frame is also provided with a controller of the device, which is mainly used to control the opening and closing of each valve and metering device. The control is implemented by using existing technology, which will not be described in detail here.

[0024] The bracket supports and protects the separator and each pipe fitting, and also plays a role of bearing force and pressure during hoisting.

[0025] In addition, in order to ensure safety, valves are provided on other branch pipelines and connecting pipelines in the present application.

[0026] Working principle: When the multi-way valve is working normally, the valve drive device drives the rotating valve core to make circular motion. The liquid from one of the eight single-well liquid inlets passes through the rotating valve core and is output from the metering port. The liquid from the other seven single-well liquid inlets is collected in the valve body cavity and output from the gathering port. The single-well liquid output from the metering port passes through the separation pipeline and is first pre-separated by the first-stage separator, then enters the second-stage separator for fine separation, and then is measured by the gas flowmeter and mass flowmeter for gas phase and liquid phase respectively. After measurement, the oil and gas are mixed and then pass through the mixed liquid external transmission pipeline to enter the normal production process.

[0027] The technical solution provided by the embodiment of the utility model has the following beneficial effects: the principle of combining cyclone separation and gravity separation is adopted to greatly improve the separation effect and measurement accuracy of the device, and ensure the reliability and stability of the device; it can simultaneously realize gas metering, liquid metering and sampling of a single well; the whole set of equipment has the characteristics of high metering accuracy, wide application range, small footprint, convenient operation and simple maintenance, and is therefore particularly suitable for oil fields where the flow rate of oil well liquid fluctuates greatly and the water content is high at the metering station. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solution of the present utility model, a brief introduction will be given to the drawings used in the embodiments below. Obviously, the drawings listed below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a work flow chart of an embodiment of the utility model;

[0030] Figure 2 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0031] Figure 3 is with Figure 2 Schematic diagram of the overall structure at different angles;

[0032] Figure 4 This is a schematic diagram of the structure of the embodiment of the utility model with part of the frame removed;

[0033] Figure 5 It is a structural schematic diagram of a multi-way valve and related parts in an embodiment of the utility model;

[0034] Figure 6 is a perspective view of a primary separator in an embodiment of the utility model;

[0035] Figure 7 It is a structural schematic diagram of a secondary separator in an embodiment of the utility model.

[0036] In the attached drawings, the components represented by each reference numeral are listed as follows: 1. Mixed liquid external transmission pipe; 2. Metering pipeline; 3. Separation pipeline; 4. Collecting pipe; 5. Primary separator; 6. Secondary separator; 7. Gas flow meter; 8. Liquid flow meter; 9. Multi-way valve; 10. Liquid collecting pipe; 11. Bracket; 12. Support seat; 13. Gas collecting pipe; 14. Liquid pipe; 15. Exhaust pipe; 16. Drain pipe; 17. Controller; 301. Expanding mouth; 601. Sound difference liquid level switch; 602. Spiral cylinder; 604. Differential pressure liquid level gauge; 901. Automatic control switch; 902. Manual control switch; 903. Measuring port; 1101. Lifting ear. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in combination with the embodiments below. Of course, the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0038] Embodiment 1:

[0039] See also Figure 1-Figure 7, a multifunctional metering device for a well group, characterized in that it comprises a multi-way valve 9 having two output ports and a plurality of liquid inlets, a primary separator 5, a secondary separator 6, a gas flow meter 7 and a liquid flow meter 8;

[0040] One of the output ports of the multi-way valve 9 is connected to the primary separator 5 through the separation pipeline 3, the other output port is connected to the mixed liquid external transmission pipeline 1 through the liquid collecting pipe 10, and the liquid inlet is connected to the single well through the metering pipeline 2;

[0041] The primary separator 5 and the secondary separator 6 are connected via an air collecting pipe 13 and a liquid pipe 14. The air collecting pipe 13 is located above the liquid pipe 14. An exhaust pipe 15 is provided at the upper part of the secondary separator 6 and a drain pipe 16 is provided at the lower part. Both the exhaust pipe 15 and the drain pipe 16 are connected to the mixed liquid external transmission pipe 1.

[0042] The multi-way valve 9 can be selected according to actual conditions. A multi-way valve 9 with eight single well liquid inlets and two outlets can be selected, one outlet being used as a metering outlet and the other outlet being used as a gathering outlet.

[0043] When the multi-way valve 9 is working normally, the valve driving device drives the rotating valve core to make circular motion, and the liquid from one of the eight single-well liquid inlets passes through the rotating valve core and is output from the metering port 903, and the liquid from the other seven single-well liquid inlets is collected in the valve body cavity and output from the collection port. The valve driving device includes a manual control switch 902 and an automatic control switch 901, which automatically selects the liquid from a single-well liquid inlet to enter the rotating valve core and output from the metering port 903, which is used to achieve the function of measuring the single-well production and sampling. It is also possible to manually rotate the hand wheel on the valve driving device to select the liquid from a single-well liquid pipe 14 line to achieve the function of measuring the single-well production and sampling.

[0044] The primary separator 5 is mainly used to separate free gas, and the secondary separator 6 is mainly used to separate bubbles. The combined use of multiple separation technologies can improve the separation effect and make the gas-liquid separation more thorough and efficient.

[0045] Working principle: When the multi-way valve 9 is working normally, the valve driving device drives the rotating valve core to make a circular motion, and the liquid from one of the eight single-well liquid inlets passes through the rotating valve core, is output from the metering port 903, and enters the separation pipeline 3. The single-well liquid entering the separation pipeline 3 is first pre-separated by the first-stage separator 5, and the gas enters the second-stage separator 6 from the gas collecting pipe 13 and the liquid enters the liquid pipe 14 for fine separation, and then the gas phase and liquid phase are measured by the gas flowmeter 7 and the mass flowmeter respectively. After the measurement, the oil and gas are mixed and passed through the collecting pipe 4 and the mixed liquid external pipe 1 to enter the normal production process.

[0046] The liquids from the other seven single well liquid inlets are collected in the valve body cavity, output from the collecting and transporting port, and enter the liquid collecting pipe 10 and flow out from the mixed liquid external transport pipe 1.

[0047] Embodiment 2:

[0048] See also Figure 1-Figure 7 On the basis of the first embodiment, the exhaust pipe 15 and the drain pipe 16 are connected to the mixed liquid delivery pipe 1 through the collecting pipe 4. The collecting pipe 4 and the separation pipe 3 are connected through an intermediate pipeline, and a manual ball valve is arranged on the intermediate pipeline.

[0049] All metering pipelines 2 are connected to the mixed liquid external delivery pipeline 1 through branch pipes, and control valves are arranged on the branch pipes.

[0050] The mixed liquid delivery pipe 1, the separation pipe 3 and the collecting pipe 4 are all provided with control valves.

[0051] The exhaust pipe 15 is provided with a regulating valve, and the liquid discharge pipe 16 is provided with a check valve.

[0052] The secondary separator 6 is provided with a differential pressure level gauge 604 and an acoustic differential level switch 601 .

[0053] A spiral cylinder 602 is arranged inside the secondary separator 6. Based on the gas-liquid cyclone separation principle, a cyclone is formed by the spiral cylinder 602. The centrifugal force generated by the cyclone separates the liquid from the mixed fluid, and then the liquid level in the tank is controlled by the liquid level switch to achieve the purpose of liquid-gas separation.

[0054] In addition, in order to ensure safety, valves are provided on other branch pipelines and connecting pipelines in the present application.

[0055] Embodiment three:

[0056] See also Figure 1-Figure 7 On the basis of the first or second embodiment, it further includes a bracket 11, the bracket 11 includes a bottom frame, the secondary separator 6 is fixed to the bottom frame through a support seat 12, the mixed liquid external transmission pipe 1 is fixed to the bottom frame through a plurality of support columns and pipe clamps, and a plurality of lifting ears 1101 are arranged on the top frame of the bracket 11.

[0057] The bottom frame is also provided with a controller 17 of the device. The controller 17 is mainly used to control the opening and closing of each valve and metering device. The control is implemented by using the existing technology and will not be described in detail here.

[0058] The bracket 11 supports and protects the separator and each pipe fitting, and also plays a role of bearing force and pressure during hoisting.

[0059] Embodiment 4:

[0060] See also Figure 1-Figure 7Based on the first embodiment, the second embodiment or the third embodiment, the separation pipe 3 extends to the upper middle part of the tank body of the first-stage separator.

[0061] The top end of the separation pipe 3 is expanded, and a trumpet-shaped expansion opening 301 is provided at the top end.

[0062] The crude oil liquid from the oil well flows upward from the separation pipe 3 through the bottom of the tank body of the first-stage separator 5 into the tank. The separation pipe 3 extends to the upper middle part of the tank body to increase the sedimentation time. The top of the separation pipe 3 is expanded, and the crude oil liquid is driven by the incoming hydraulic pressure and gushes out from bottom to top. In this process, part of the gas in the crude oil liquid is separated and gathered at the top of the tank body to enter the gas collecting pipe 13, and the remaining mixed liquid flows out from the bottom and enters the secondary separator 6 for secondary separation.

[0063] Embodiment five:

[0064] See also Figure 1-Figure 7 , a multifunctional metering device for a well group, characterized in that it comprises a multi-way valve 9 having two output ports and a plurality of liquid inlets, a primary separator 5, a secondary separator 6, a gas flow meter 7 and a liquid flow meter 8;

[0065] One of the output ports of the multi-way valve 9 is connected to the primary separator 5 through the separation pipeline 3, the other output port is connected to the mixed liquid external transmission pipeline 1 through the liquid collecting pipe 10, and the liquid inlet is connected to the single well through the metering pipeline 2;

[0066] The primary separator 5 and the secondary separator 6 are connected via an air collecting pipe 13 and a liquid pipe 14. The air collecting pipe 13 is located above the liquid pipe 14. An exhaust pipe 15 is provided at the upper part of the secondary separator 6 and a drain pipe 16 is provided at the lower part. Both the exhaust pipe 15 and the drain pipe 16 are connected to the mixed liquid external transmission pipe 1.

[0067] The multi-way valve 9 can be selected according to actual conditions. A multi-way valve 9 with eight single well liquid inlets and two outlets can be selected, one outlet being used as a metering outlet and the other outlet being used as a gathering outlet.

[0068] When the multi-way valve 9 is working normally, the valve driving device drives the rotating valve core to make circular motion, and the liquid from one of the eight single-well liquid inlets passes through the rotating valve core and is output from the metering port 903, and the liquid from the other seven single-well liquid inlets is collected in the valve body cavity and output from the collection port. The valve driving device includes a manual control switch 902 and an automatic control switch 901, which automatically selects the liquid from a single-well liquid inlet to enter the rotating valve core and output from the metering port 903, which is used to achieve the function of measuring the single-well production and sampling. It is also possible to manually rotate the hand wheel on the valve driving device to select the liquid from a single-well liquid pipe 14 line to achieve the function of measuring the single-well production and sampling.

[0069] The primary separator 5 is mainly used to separate free gas, and the secondary separator 6 is mainly used to separate bubbles. The combined use of multiple separation technologies can improve the separation effect and make the gas-liquid separation more thorough and efficient.

[0070] The exhaust pipe 15 and the liquid discharge pipe 16 are connected to the mixed liquid delivery pipe 1 through the collecting pipe 4. The collecting pipe 4 and the separation pipe 3 are connected through an intermediate pipeline, and a manual ball valve is arranged on the intermediate pipeline.

[0071] All metering pipelines 2 are connected to the mixed liquid external delivery pipeline 1 through branch pipes, and control valves are arranged on the branch pipes.

[0072] The mixed liquid delivery pipe 1, the separation pipe 3 and the collecting pipe 4 are all provided with control valves.

[0073] The exhaust pipe 15 is provided with a regulating valve, and the liquid discharge pipe 16 is provided with a check valve.

[0074] The secondary separator 6 is provided with a differential pressure level gauge 604 and an acoustic differential level switch 601 .

[0075] A spiral cylinder 602 is arranged inside the secondary separator 6. Based on the gas-liquid cyclone separation principle, a cyclone is formed by the spiral cylinder 602. The centrifugal force generated by the cyclone separates the liquid from the mixed fluid, and then the liquid level in the tank is controlled by the liquid level switch to achieve the purpose of liquid-gas separation.

[0076] In addition, in order to ensure safety, valves are provided on other branch pipelines and connecting pipelines in the present application.

[0077] It also includes a bracket 11, which includes a bottom frame. The secondary separator 6 is fixed to the bottom frame through a support seat 12, and the mixed liquid external transmission pipe 1 is fixed to the bottom frame through a plurality of support columns and pipe clamps. A plurality of lifting ears 1101 are provided on the top frame of the bracket 11.

[0078] The bottom frame is also provided with a controller 17 of the device. The controller 17 is mainly used to control the opening and closing of each valve and metering device. The control is implemented by using the existing technology and will not be described in detail here.

[0079] The bracket 11 supports and protects the separator and each pipe fitting, and also plays a role of bearing force and pressure during hoisting.

[0080] The separation pipeline 3 extends to the upper middle part of the tank body of the first-stage separator.

[0081] The top end of the separation pipe 3 is expanded.

[0082] Working principle: When the multi-way valve 9 works normally, the valve driving device drives the rotating valve core to make circular motion. The liquid from one of the eight single-well liquid inlets passes through the rotating valve core, is output from the metering port 903, and enters the separation pipeline 3. The single-well liquid entering the separation pipeline 3 is first pre-separated by the first-stage separator 5, and the single-well liquid enters the tank upward from the separation pipeline 3 through the bottom of the tank body of the first-stage separator 5. Driven by the pressure of the incoming liquid, the crude oil liquid is dispersed and gushed out from bottom to top. In this process, part of the gas in the crude oil liquid is separated and gathered at the top of the tank body to enter the gas collecting pipe 13, and the remaining mixed liquid flows out from the bottom to enter the secondary separator 6 for secondary separation. In the secondary separator 6, based on the principle of gas-liquid cyclone separation, a cyclone is formed by the spiral column 602. The centrifugal force generated by the cyclone separates the liquid from the mixed fluid, and then the liquid level in the tank is controlled by the liquid level switch, thereby achieving the purpose of liquid-gas separation.

[0083] The gas enters the secondary separator 6 from the gas collecting pipe 13 and the liquid enters the liquid pipe 14 for fine separation, and then the gas phase and liquid phase are measured by the gas flow meter 7 and the mass flow meter respectively. After the measurement, the oil and gas are mixed and pass through the collecting pipe 4 and the mixed liquid output pipe 1 to enter the normal production process.

[0084] The liquids from the other seven single well liquid inlets are collected in the valve body cavity, output from the collecting and transporting port, and enter the liquid collecting pipe 10 and flow out from the mixed liquid external transport pipe 1.

[0085] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multifunctional metering device for a well group, characterized in that: It includes a multi-way valve with two output ports and a plurality of liquid inlets, a primary separator, a secondary separator, a gas flow meter and a liquid flow meter; One of the output ports of the multi-way valve is connected to the primary separator through a separation pipeline, the other output port is connected to the mixed liquid external transmission pipeline through a liquid collecting pipe, and the liquid inlet is connected to a single well through a metering pipeline; The primary separator and the secondary separator are connected via an air collecting pipe and a liquid pipe. The air collecting pipe is located above the liquid pipe. The secondary separator is provided with an exhaust pipe at the top and a drain pipe at the bottom. Both the exhaust pipe and the drain pipe are connected to the mixed liquid external transmission pipe.

2. The multifunctional metering device for a well group according to claim 1, characterized in that: The exhaust pipe and the liquid discharge pipe are connected to the mixed liquid external transmission pipe through a collecting pipe.

3. The multifunctional metering device for a well group according to claim 1, characterized in that: All the metering pipelines are connected to the mixed liquid external delivery pipeline through branch pipes, and control valves are arranged on the branch pipes.

4. The multifunctional metering device for a well group according to claim 2, characterized in that: The mixed liquid external delivery pipe, the separation pipe and the collecting pipe are all provided with control valves.

5. The multifunctional metering device for a well group according to claim 1, characterized in that: The exhaust pipe is provided with a regulating valve, and the liquid discharge pipe is provided with a check valve.

6. The multifunctional metering device for a well group according to claim 1, characterized in that: The secondary separator is provided with a differential pressure level meter and a sound differential level switch.

7. The multifunctional metering device for a well group according to claim 1, characterized in that: A spiral column is arranged inside the secondary separator.

8. The multifunctional metering device for a well group according to claim 1, characterized in that: The separation pipeline extends to the upper middle part of the tank body of the primary separator.

9. The multifunctional metering device for a well group according to claim 1, characterized in that: The top end of the separation pipe is expanded.

10. The multifunctional metering device for a well group according to claim 1, characterized in that: It also includes a bracket, which includes a bottom frame. The secondary separator is fixed on the bottom frame through a support seat, and the mixed liquid external transmission pipe is fixed on the bottom frame through a plurality of support columns and pipe clamps.

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