Oil, gas and water mixed transportation pressurization three-phase metering skid

Abstract

This invention discloses a three-phase metering skid for oil-gas-water mixed transportation pressurization, relating to the field of three-phase metering technology for oil well fluids. The technical solution includes: a main cyclone separator, an outlet gas channel, a branch pipe, and an outlet liquid channel. The main cyclone separator is fixedly equipped with a main feed pipe, a main outlet gas pipe, a main outlet liquid pipe, and a main drain pipe. A level gauge is installed inside the main cyclone separator. The main outlet gas pipe is connected to the outlet gas channel, and the main outlet liquid pipe is connected to the outlet liquid channel. A mass flow meter, a water cut analyzer, and an electric three-way valve are sequentially installed from one end to the other in the outlet liquid channel. A pressure gauge and a gas flow meter are installed in the outlet gas channel. One end of the branch pipe is connected to the outlet gas channel, and the other end of the branch pipe is connected to one end of the electric three-way valve. This invention can control the switching of the electric three-way valve to control the system liquid level, pressure, and metered oil well production and water cut, ensuring the stability of measurement results and process flow.

Description

Technical Field

[0001] This invention relates to the field of three-phase metering technology for oil well fluids, and more specifically to a three-phase metering skid for oil-gas-water mixed transportation pressurization. Background Technology

[0002] In oilfield development, accurately obtaining the oil, gas, and water volumes of oil wells and calculating parameters such as water cut and gas-oil ratio are crucial for formulating oil well production enhancement measures and developing adjustment plans. Accurate measurement of the three-phase flow rates of oil, gas, and water using three-phase metering devices helps oilfield companies better understand the production status of oil wells and optimize production management.

[0003] In existing three-phase metering devices, hydrocyclones are used to separate the gas and liquid phases of oil well fluid. However, the hydrocyclone requires a suitable liquid level to discharge the fluid, as this helps maintain pressure stability within the separator. Excessively high or low liquid levels will disrupt the pressure balance between the gas and liquid phases within the separator, potentially causing pressure fluctuations and affecting the stability of the entire process. Current three-phase metering devices cannot guarantee that the separated oil well fluid will be discharged at the appropriate liquid level, thus compromising process stability. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a three-phase metering skid for oil-gas-water mixed transportation and pressurization. This skid utilizes a level gauge to monitor the liquid level in the main cyclone separator in real time, and an electrically operated three-way valve connects the gas outlet and liquid outlet channels. Upper and lower limits for liquid level control are set: an upper liquid level Hhigh and a lower liquid level Hlow. The level gauge measures the liquid level in the main cyclone separator in real time. Before the liquid level reaches the set upper liquid level Hhigh, the electrically operated three-way valve closes the liquid outlet channel and opens the gas outlet channel, monitoring the gas flow rate. When the liquid level accumulates to the set upper liquid level Hhigh, [the gas flow rate is monitored]. The level gauge switches the electric three-way valve to three states via the control system, closing the gas outlet channel and opening the liquid outlet channel. The separated liquid flows from the liquid outlet channel through the mass flow meter and water cut analyzer to measure the liquid volume and water cut before entering the production manifold. When the liquid level drops to the lower liquid level H, the level gauge switches the electric three-way valve to three states again via the control system to measure the gas again. This process is repeated. By controlling the switching of the electric three-way valve in this way, the level gauge controls the system liquid level, pressure, and measures the well production and water cut, ensuring the stability of the measurement results and the process flow.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A three-phase metering skid for oil-gas-water mixed transportation and pressurization includes a main cyclone separator, an outlet channel, a branch pipe, and a liquid outlet channel. The main cyclone separator is fixedly equipped with a main feed pipe, a main outlet pipe, a main liquid outlet pipe, and a main drain pipe. A level gauge is installed inside the main cyclone separator. The main outlet pipe is connected to the outlet channel, and the main liquid outlet pipe is connected to the liquid outlet channel. A mass flow meter, a water content analyzer, and an electric three-way valve are installed sequentially from one end to the other in the liquid outlet channel. A pressure gauge and a gas flow meter are installed in the outlet channel. One end of the branch pipe is connected to the outlet channel, and the other end of the branch pipe is connected to one end of the electric three-way valve.

[0007] It also includes a secondary cyclone separator, an electric three-way valve II, a three-way pipe III, and a branch pipe II. The secondary cyclone separator is fixedly installed with a secondary feed pipe, a secondary air outlet pipe, a secondary liquid outlet pipe, and a secondary sewage discharge pipe. The electric three-way valve II is fixedly installed between the main liquid outlet pipe, the secondary liquid outlet pipe, and the liquid outlet channel. The main liquid outlet pipe, the secondary liquid outlet pipe, and the liquid outlet channel are connected through the electric three-way valve II. The three-way pipe III is fixedly installed between the main air outlet pipe, the secondary air outlet pipe, and the air outlet channel. The main air outlet pipe, the secondary air outlet pipe, and the air outlet channel are connected through the three-way pipe III. An electric three-way valve I is fixedly installed between the air outlet channel, branch pipe I, and branch pipe II. The air outlet channel, branch pipe I, and branch pipe II are connected through the electric three-way valve I. One end of the electric three-way valve III is fixedly installed with the three-way pipe I. One end of the branch pipe II is fixedly connected to one end of the three-way pipe I. The other end of the three-way pipe I is fixedly installed with a check valve.

[0008] The main cyclone separator is fed with liquid, and gas-liquid separation is performed first. Both electric three-way valve one and electric three-way valve three are switched to the closed state of branch pipe one. When the liquid level of the main cyclone separator reaches the set upper liquid level H, the main cyclone separator stops feeding liquid, and the auxiliary cyclone separator is fed with liquid and performs gas-liquid separation. The control system closes the auxiliary liquid outlet pipe, and the main liquid outlet is unobstructed. The liquid separated in the main cyclone separator enters the liquid outlet channel for detection, and the separated gas is detected through the gas outlet channel and branch pipe two, and then flows into the production manifold. When the liquid level of the auxiliary cyclone separator reaches the set upper liquid level H, the auxiliary cyclone separator stops feeding liquid, and the main cyclone separator is fed with liquid and performs gas-liquid separation. The control system closes the main liquid outlet pipe 103, and the auxiliary liquid outlet pipe 203 is unobstructed. The liquid separated in the auxiliary cyclone separator enters the liquid outlet channel for detection, and the separated gas is detected through the gas outlet channel and branch pipe two, and then flows into the production manifold.

[0009] The internal structure of the main cyclone separator is the same as that of the auxiliary cyclone separator. A riser pipe is inserted through the top of the main cyclone separator. A liquid baffle is fixedly installed on the top of the main cyclone separator. The liquid baffle is sleeved outside the riser pipe. The lower end of the liquid baffle is on the same plane as the lower end of the riser pipe, and the horizontal height of the main feed pipe is higher than the horizontal height of the lower end of the liquid baffle.

[0010] As a further improvement of the present invention, an oil-gas-water mixed transportation pressurization three-phase metering skid also includes a feed main pipe, and an electric three-way valve four is fixedly installed between the main feed pipe, the auxiliary feed pipe and the feed main pipe, and the main feed pipe, the auxiliary feed pipe and the feed main pipe are connected through the electric three-way valve four.

[0011] As a further improvement of the present invention, a T-connector is fixedly installed between the main sewage pipe and the secondary sewage pipe, and the main sewage pipe and the secondary sewage pipe are connected through the T-connector.

[0012] As a further improvement of the present invention, quick-connect sleeves are fixedly installed at one end of the electric three-way valve 2, one end of the electric three-way valve 4, one end of the three-way pipe 2, and one end of the three-way pipe 3. Quick connectors are fixedly installed at one end of the auxiliary liquid outlet pipe, one end of the auxiliary feed pipe, one end of the auxiliary sewage pipe, and one end of the auxiliary gas outlet pipe. Each of the quick-connect sleeves is respectively fitted onto the corresponding quick connector.

[0013] As a further improvement of the present invention, the quick-connect sleeve includes a quick-connect sleeve shell, a movable sleeve, and a spring. The outer wall of the quick-connect sleeve shell and the interior of the movable sleeve are both provided with spring grooves. The spring is located at the position where the two spring grooves overlap. One end of the quick-connect sleeve shell is provided with a sleeve groove. One end of the quick-connect sleeve shell is provided with a plurality of ball holes in a circular array. Locking beads are slidably installed in each of the plurality of ball holes. A limiting stop ring is sleeved on the outer wall of one end of the quick-connect sleeve shell. An annular groove is provided on the inner wall of one end of the movable sleeve. The quick connector includes a quick connector shell. The outer wall of the quick connector shell is provided with an annular groove.

[0014] As a further improvement of the present invention, the diameter of the sleeve groove is smaller than the outer diameter of the quick connector shell, and a sealing ring is fixedly installed on the inner wall of the sleeve groove.

[0015] As a further improvement of the present invention, both the interior of the quick-connect sleeve and the interior of the quick-connect housing are provided with a self-sealing assembly. The self-sealing assembly includes a fixed sleeve, a movable part, a beveled ring, and a second spring. The movable part includes a long rod, a conical part, and a short rod. The long rod is fixedly connected to one end of the conical part, and the short rod is fixedly connected to the other end of the conical part. The long rod passes through the fixed sleeve. The second spring is sleeved on the long rod and is located between the fixed sleeve and the conical part. A sealing gasket is fixedly connected to the beveled surface of the conical part. The beveled surface of the beveled ring is opposite to the beveled surface of the conical part, and the sealing gasket is fitted to the beveled surface of the beveled ring. The short rod passes through the middle of the beveled ring.

[0016] As a further improvement of the present invention, an isolation plate is fixedly installed at the bottom of the main cyclone separator, and the main liquid outlet pipe is located below the isolation plate.

[0017] The beneficial effects of this invention are:

[0018] By setting a level gauge to monitor the liquid level in the main cyclone separator in real time, and setting an electric three-way valve to connect the gas outlet and liquid outlet channels, the level control upper and lower limits are set: upper liquid level H (high) and lower liquid level H (low). The level gauge measures the liquid level in the main cyclone separator in real time. Before the liquid level reaches the set upper liquid level H (high), the electric three-way valve closes the liquid outlet channel and opens the gas outlet channel to detect the gas flow rate. When the liquid level accumulates to the set upper liquid level H (high), the level gauge switches the state of the electric three-way valve through the control system, closing the gas outlet channel and opening the liquid outlet channel. The separated liquid flows from the liquid outlet channel through the mass flow meter and water cut analyzer to measure the liquid volume and water cut before entering the production manifold. When the liquid level drops to the lower liquid level H (low), the level gauge switches the state of the electric three-way valve through the control system again to measure the gas again. This process is repeated. By controlling the switching of the electric three-way valve in this way, the system liquid level, pressure, and well production and water cut are controlled, ensuring the stability of the measurement results and process flow.

[0019] By setting up a secondary cyclone separator, when the liquid level in the main cyclone separator reaches the set upper liquid level H, the control system closes the secondary outlet pipe, while the main outlet pipe remains open. The liquid separated in the main cyclone separator enters the outlet channel for detection, and the separated gas is detected through the outlet channel and branch pipe two before flowing into the production manifold. When the liquid level in the secondary cyclone separator reaches the set upper liquid level H, the control system closes the main outlet pipe, while the secondary outlet pipe remains open. The liquid separated in the secondary cyclone separator enters the outlet channel for detection, and the separated gas is detected through the outlet channel and branch pipe two before flowing into the production manifold. Through the above structural setup, the liquid and gas paths are always unobstructed, and all detection devices are always working, greatly improving measurement efficiency.

[0020] The quick-connect sleeve and quick-connect fitting structure greatly improves the speed of installation and disassembly between pipes, and the pipes can be automatically sealed after separation, which facilitates the disassembly and assembly of the cyclone separator and makes it easy to switch between the single cyclone separator working mode and the dual cyclone separator working mode of this invention. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the connection structure of the main cyclone separator of the present invention;

[0022] Figure 2 This is a side view of the main cyclone separator of the present invention;

[0023] Figure 3 This is a three-dimensional structural schematic diagram of a three-phase metering skid for boosting oil, gas and water mixed transportation according to the present invention;

[0024] Figure 4 This is a three-dimensional structural diagram of the secondary cyclone separator of the present invention;

[0025] Figure 5 This is a three-dimensional structural diagram of the auxiliary liquid outlet tube of the present invention;

[0026] Figure 6 This is a three-dimensional structural diagram of the auxiliary air outlet pipe of the present invention;

[0027] Figure 7 This is a cross-sectional structural diagram of the quick-connect sleeve of the present invention;

[0028] Figure 8 This is a cross-sectional structural diagram of the quick connector of the present invention;

[0029] Figure 9 This is a cross-sectional schematic diagram of the main cyclone separator of the present invention.

[0030] Figure reference numerals: 1. Main cyclone separator; 101. Main feed pipe; 102. Main gas outlet pipe; 103. Main liquid outlet pipe; 104. Main drain pipe; 105. Air riser pipe; 106. Liquid baffle; 107. Isolation plate; 2. Secondary cyclone separator; 201. Secondary feed pipe; 202. Secondary gas outlet pipe; 203. Secondary liquid outlet pipe; 204. Secondary drain pipe; 3. Gas flow meter; 4. Electric three-way valve one; 5. Electric three-way valve two; 6. Mass flow meter; 7. Moisture content analyzer; 8. Electric three-way valve three; 9. Three-way pipe one; 10. Check valve; 11. Electric 12. Three-way valve 4; 13. Three-way pipe 2; 14. Quick-connect sleeve; 15. Quick-connect sleeve housing; 16. Movable sleeve; 17. Spring 1; 18. Locking ball; 19. Ring groove 1; 10. Limiting ring; 110. Sealing ring; 12. Three-way pipe 3; 13. Quick connector; 14. Quick connector housing; 15. Ring groove 2; 15. Movable part; 15. Fixed sleeve; 15. Spring 2; 15. Sealing gasket; 16. Inclined ring; 17. Air outlet channel; 18. Branch pipe 1; 19. Branch pipe 2; 10. Liquid outlet channel; 11. Main feed pipe. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. The components of the embodiments of this disclosure described and shown herein can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this disclosure is not intended to limit the scope of the claimed disclosure, but merely represents selected embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure.

[0032] refer to Figure 1 and Figure 2As shown, this invention discloses a three-phase metering skid for boosting oil, gas, and water mixed transportation, comprising a main cyclone separator 1, an outlet channel 16, a branch pipe 17, and a liquid outlet channel 19. The main cyclone separator 1 is fixedly equipped with a main feed pipe 101, a main outlet pipe 102, a main liquid outlet pipe 103, and a main drain pipe 104. A level gauge is installed inside the main cyclone separator 1. The main outlet pipe 102 is connected to the outlet channel 16, and the main liquid outlet pipe 103 is connected to the liquid outlet channel 19. The liquid outlet channel 19... A mass flow meter 6, a moisture analyzer 7, and an electric three-way valve 8 are installed sequentially from one end to the other. A pressure gauge and a gas flow meter 3 are installed on the gas outlet channel 16. One end of the branch pipe 17 is connected to the gas outlet channel 16, and the other end of the branch pipe 17 is connected to one end of the electric three-way valve 8. Both the level gauge and the electric three-way valve 8 are connected to the control system. According to the production conditions, upper and lower limits for level control are set: upper level H (high) and lower level H (low). The level gauge measures the level in the main cyclone separator 1 in real time. Before the liquid level reaches the set upper liquid level H, the electric three-way valve 38 closes the outlet channel 19. The separated gas flows from the gas outlet channel 16 through the gas flow meter 3 and the electric three-way valve 38 into the production manifold. When the liquid level accumulates to the set upper liquid level H, the level gauge sends a signal to the electric three-way valve 38 through the control system. The electric three-way valve 38 switches to close the gas outlet channel 16, ensuring unobstructed liquid flow. The separated liquid flows from the outlet channel 19 through the mass flow meter 6 and the water content analyzer 7 to measure the liquid volume and... After the water cut is measured, it enters the production manifold. When the liquid level drops to the lower liquid level H, the level gauge sends a signal to the electric three-way valve 38 through the control system. The electric three-way valve 38 switches back to the gas path to measure the gas again, and the liquid level gradually accumulates. When it rises again to the set upper liquid level H, the electric three-way valve 38 switches again. By controlling the switching of the electric three-way valve 38 in this way, the system liquid level, pressure, and well production and water cut are controlled, ensuring the stability of the measurement results and the process flow.

[0033] In a further embodiment, such as Figures 3-6As shown, the present invention also includes a secondary cyclone separator 2, an electric three-way valve 2 5, a three-way pipe 3 14, and a branch pipe 2 18. The secondary cyclone separator 2 is fixedly installed with a secondary feed pipe 201, a secondary air outlet pipe 202, a secondary liquid outlet pipe 203, and a secondary sewage discharge pipe 204. The electric three-way valve 2 5 is fixedly installed between the main liquid outlet pipe 103, the secondary liquid outlet pipe 203, and the liquid outlet channel 19. The main liquid outlet pipe 103, the secondary liquid outlet pipe 203, and the liquid outlet channel 19 are connected by the electric three-way valve 2 5. The three-way pipe 3 14 is fixedly installed between the main air outlet pipe 102, the secondary air outlet pipe 202, and the air outlet channel 16. The main exhaust pipe 102, the auxiliary exhaust pipe 202, and the exhaust channel 16 are connected by a three-way pipe 14. An electric three-way valve 4 is fixedly installed between the exhaust channel 16, branch pipe 17, and branch pipe 2 18. One end of the electric three-way valve 4 is fixedly installed with a three-way pipe 9. One end of branch pipe 2 18 is fixedly connected to one end of three-way pipe 9. The other end of three-way pipe 9 is fixedly installed with a check valve 10. When gas-liquid separation is performed only using the main cyclone separator 1, the gas path and the liquid path alternate. When the system is activated, continuous measurement of both gas and liquid flow rates is impossible, resulting in low measurement efficiency. According to the above structural setup, liquid is introduced into the main cyclone separator 1, where gas-liquid separation is performed first. Both electric three-way valves 4 and 8 are switched to the closed position of branch pipe 17. When the liquid level in the main cyclone separator 1 reaches the set upper liquid level H, the main cyclone separator 1 stops introducing liquid, and the auxiliary cyclone separator 2 introduces liquid and performs gas-liquid separation. The control system closes the auxiliary liquid outlet pipe 203, while the main liquid outlet pipe 103 remains unobstructed. The liquid separated in the main cyclone separator 1 enters the liquid outlet channel 19 for detection, and the separated gas exits through the gas outlet. The liquid is detected through channel 16 and branch pipe 2 18 before flowing into the production manifold. When the liquid level in the secondary cyclone separator 2 reaches the set upper liquid level H, the secondary cyclone separator 2 stops feeding liquid, the main cyclone separator 1 feeds liquid and performs gas-liquid separation, the control system closes the main outlet pipe 103, and the secondary outlet pipe 203 remains unobstructed. The liquid separated in the secondary cyclone separator 2 enters the outlet channel 19 for detection, and the separated gas is detected through the outlet channel 16 and branch pipe 2 18 before flowing into the production manifold. Through the above structural setup, the liquid and gas paths are always unobstructed, and all detection devices are always working, greatly improving measurement efficiency.

[0034] In a further embodiment, the present invention also includes a feed manifold 20. An electric three-way valve 11 is fixedly installed between the main feed pipe 101, the auxiliary feed pipe 201, and the feed manifold 20. The main feed pipe 101, the auxiliary feed pipe 201, and the feed manifold 20 are connected via the electric three-way valve 11. Feed is introduced into the feed manifold 20. The control system controls the electric three-way valve 11 to switch the connection state of the main feed pipe 101 and the auxiliary feed pipe 201, alternately introducing liquid into the main cyclone separator 1 and the auxiliary cyclone separator 2. This ensures that no liquid is introduced into the cyclone separator in the measurement state, maintaining the stability of the liquid state within the cyclone separator and improving the measurement effect. A three-way pipe 12 is fixedly installed between the main drain pipe 104 and the auxiliary drain pipe 204. The main drain pipe 104 and the auxiliary drain pipe 204 are connected via the three-way pipe 12, facilitating synchronous drainage of the main cyclone separator 1 and the auxiliary cyclone separator 2.

[0035] In a further embodiment, quick-connect sleeves 13 are fixedly installed at one end of the electric three-way valve 2 5, one end of the electric three-way valve 4 11, one end of the three-way pipe 2 12, and one end of the three-way pipe 3 14. Quick connectors 15 are fixedly installed at one end of the auxiliary liquid outlet pipe 203, one end of the auxiliary feed pipe 201, one end of the auxiliary sewage pipe 204, and one end of the auxiliary air outlet pipe 202. Each quick-connect sleeve 13 is respectively fitted onto the corresponding quick connector 15, facilitating the installation and disassembly of the auxiliary cyclone separator 2. Figure 7 and Figure 8As shown, the quick-connect sleeve 13 includes a quick-connect sleeve shell 131, a movable sleeve 132, and a spring 133. The outer wall of the quick-connect sleeve shell 131 and the interior of the movable sleeve 132 are both provided with spring grooves. The spring 133 is positioned where the two spring grooves overlap. One end of the quick-connect sleeve shell 131 has a sleeve groove. Multiple ball holes are arranged in a circular array at one end of the quick-connect sleeve shell 131, and locking beads 134 are slidably installed in each of the ball holes. A limiting ring 136 is fitted onto the outer wall of one end of the quick-connect sleeve shell 131. An annular groove 135 is provided on the inner wall of one end of the movable sleeve 132. The quick-connect connector 15 includes a quick-connect connector shell 151. An annular groove 152 is provided on the outer wall of the quick-connect connector shell 151. Under normal conditions, the annular groove 135 and the locking beads 134 are misaligned, and the locking beads 134 protrude from the inner wall of the quick-connect sleeve shell 131. The limiting ring 136 limits the movable sleeve 132 to prevent it from detaching from the quick-connect sleeve 131. When the quick connector 15 is connected to the quick-connect sleeve 13, the movable sleeve 132 is pushed to compress the spring 133, so that the position of the annular groove 135 corresponds to the position of the locking ball 134. The locking ball 134 is in a movable state. The quick connector shell 151 is inserted into the sleeve groove, and the quick connector shell 151 pushes the locking ball 134 outward, so that the locking ball 134 enters the annular groove 135. After the quick connector shell 151 is fully in the sleeve groove, the movable sleeve 132 is released. The movable sleeve 132 is reset under the elastic force of the spring 133. The movable sleeve 132 pushes the locking ball 134 into the annular groove 152, and the locking ball 134 locks the quick connector shell 151. Through the setting of the quick connector 15 and the quick-connect sleeve 13, the secondary cyclone separator 2 can be quickly assembled and disassembled. The diameter of the sleeve groove is smaller than the outer diameter of the quick connector housing 151, and a sealing ring 137 is fixedly installed on the inner wall of the sleeve groove to seal the connection between the quick connector housing 151 and the quick connector sleeve 131.

[0036] Both the quick-connect sleeve 131 and the quick-connect housing 151 are equipped with self-sealing components. Each self-sealing component includes a fixed sleeve 154, a movable part 153, a beveled ring 157, and a second spring 155. The fixed sleeve 154 and the beveled ring 157 are fixedly installed on the inner walls of their respective housings. The movable part 153 includes a long rod, a tapered part, and a short rod. The long rod is fixedly connected to one end of the tapered part, and the short rod is fixedly connected to the other end of the tapered part. The long rod passes through the fixed sleeve 154. The second spring 155 is sleeved on the long rod and positioned between the fixed sleeve 154 and the tapered part. A sealing washer 156 is fixedly connected to the beveled surface of the tapered part. The inclined surface of ring 157 is opposite to the inclined surface of the conical part, and the sealing gasket 156 is attached to the inclined surface of the inclined ring 157. The short rod passes through the middle of the inclined ring 157. Under normal conditions, spring 155 is in a compressed state. The elastic force of spring 155 pushes the movable part 153 to squeeze the inclined ring 157. The sealing gasket 156 is tightly attached to the inclined surface of the inclined ring 157. The pipes on both sides of the inclined ring 157 are not connected. When an external force contacts the short rod and pushes the movable part 153, the movable part 153 compresses spring 155, and the sealing gasket 156 is separated from the inclined surface of the inclined ring 157. The pipes on both sides of the inclined ring 157 are connected. This structure is set at the end of the pipe to ensure that the pipe end remains sealed when the two connected pipes are separated.

[0037] The internal structure of the main cyclone separator 1 is the same as that of the auxiliary cyclone separator 2, such as... Figure 9 As shown, a riser pipe 105 is inserted through the top of the main cyclone separator 1, and a liquid baffle 106 is fixedly installed inside the top of the main cyclone separator 1. The liquid baffle 106 is sleeved outside the riser pipe 105, and the lower end of the liquid baffle 106 is on the same plane as the lower end of the riser pipe 105. The horizontal height of the main feed pipe 101 is higher than the horizontal height of the lower end of the liquid baffle 106 to prevent the liquid film on the cylinder wall from being discharged with the gas.

[0038] A partition plate 107 is fixedly installed at the bottom of the main cyclone separator 1. The main outlet pipe 103 is located below the partition plate 107, providing a contact surface. The end of the vortex rotates continuously on this surface, separating the vortex area from the lower liquid pool. This avoids the influence of the vortex tail on the liquid in the lower part of the main cyclone separator 1 and the liquid separated to the wall. The part of the main outlet pipe 103 that extends into the main cyclone separator 1 is set in a siphon structure to ensure a good seal at the bottom of the main cyclone separator 1 and to ensure the separation effect.

[0039] Working principle:

[0040] When the present invention operates in single cyclone separator mode, the corresponding quick connector 15 and quick-connect sleeve 13 are separated, the auxiliary cyclone separator 2 is removed, and upper and lower limits for liquid level control are set: upper liquid level H high and lower liquid level H low. The liquid level gauge measures the liquid level in the main cyclone separator 1 in real time. Before the liquid level reaches the set upper liquid level H high, the electric three-way valve 8 closes the liquid outlet channel 19. The separated gas flows from the gas outlet channel 16 through the gas flow meter 3 and the electric three-way valve 8 into the production manifold. When the liquid level accumulates to the set upper liquid level H high, the liquid level gauge sends a signal to the electric three-way valve 8 through the control system. Switching to close the gas outlet channel 16 ensures unobstructed liquid flow. The separated liquid flows from the liquid outlet channel 19 through the mass flow meter 6 and the water cut analyzer 7 to measure the liquid volume and water cut before entering the production manifold. When the liquid level drops to the lower liquid level H, the level gauge sends a signal to the electric three-way valve 8 through the control system. The electric three-way valve 8 switches back to the gas path to measure the gas again, and the liquid level gradually accumulates. When it rises again to the set upper liquid level H, the electric three-way valve 8 switches again. By controlling the switching of the electric three-way valve 8 back and forth, the system liquid level, pressure, and well production and water cut are controlled.

[0041] When operating in dual-cyclone separator mode, connect the corresponding quick connector 15 and quick-connect sleeve 13 to install the auxiliary cyclone separator 2. Liquid enters the main cyclone separator 1, and gas-liquid separation is performed first. Electric three-way valves 4 and 8 are both switched to the closed position of branch pipe 17. When the liquid level in the main cyclone separator 1 reaches the set upper liquid level H, the main cyclone separator 1 stops entering liquid, and the auxiliary cyclone separator 2 enters liquid and performs gas-liquid separation. The control system closes the auxiliary outlet pipe 203, and the main outlet pipe 103 remains unobstructed. The liquid separated in the main cyclone separator 1... The liquid enters the liquid outlet channel 19 for detection. The separated gas passes through the gas outlet channel 16 and the second branch pipe 18 for detection, and then flows into the production manifold. When the liquid level of the secondary cyclone separator 2 reaches the set upper liquid level H, the secondary cyclone separator 2 stops feeding liquid, the main cyclone separator 1 feeds liquid and performs gas-liquid separation, the control system closes the main liquid outlet pipe 103, the secondary liquid outlet pipe 203 is unobstructed, the liquid separated in the secondary cyclone separator 2 enters the liquid outlet channel 19 for detection, and the separated gas passes through the gas outlet channel 16 and the second branch pipe 18 for detection, and then flows into the production manifold.

[0042] Finally, it should be noted that the above-described embodiments are merely specific implementations of this disclosure, used to illustrate the technical solutions of this disclosure, and not to limit it. The protection scope of this disclosure is not limited thereto. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the scope of the technology disclosed in this disclosure. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this disclosure, and should all be covered within the protection scope of this disclosure. Therefore, the protection scope of this disclosure should be determined by the protection scope of the claims.

Claims

1. A three-phase metering skid for oil-gas-water mixed transportation and pressurization, comprising a main cyclone separator (1), an outlet gas channel (16), a branch pipe (17), and an outlet liquid channel (19), wherein a main feed pipe (101), a main outlet gas pipe (102), a main outlet liquid pipe (103), and a main drain pipe (104) are fixedly installed on the main cyclone separator (1), characterized in that: The main cyclone separator (1) is equipped with a level gauge inside. The main gas outlet pipe (102) is connected to the gas outlet channel (16). The main liquid outlet pipe (103) is connected to the liquid outlet channel (19). The liquid outlet channel (19) is equipped with a mass flow meter (6), a water content analyzer (7), and an electric three-way valve (8) in sequence from one end to the other. The gas outlet channel (16) is equipped with a pressure gauge and a gas flow meter (3). One end of the branch pipe (17) is connected to the gas outlet channel (16), and the other end of the branch pipe (17) is connected to one end of the electric three-way valve (8). It also includes a secondary cyclone separator (2), an electric three-way valve two (5), a three-way pipe three (14), and a branch pipe two (18). The secondary cyclone separator (2) is fixedly installed with a secondary feed pipe (201), a secondary air outlet pipe (202), a secondary liquid outlet pipe (203), and a secondary sewage pipe (204). The electric three-way valve two (5) is fixedly installed between the main liquid outlet pipe (103), the secondary liquid outlet pipe (203), and the liquid outlet channel (19). The main liquid outlet pipe (103), the secondary liquid outlet pipe (203), and the liquid outlet channel (19) are connected by the electric three-way valve two (5). The three-way pipe three (14) is fixedly installed between the main air outlet pipe (102) and the secondary air outlet pipe (204). 2) Between the main air outlet pipe (102), the auxiliary air outlet pipe (202) and the air outlet channel (16), the main air outlet pipe (102), the auxiliary air outlet pipe (202) and the air outlet channel (16) are connected by a three-way pipe (14). An electric three-way valve (4) is fixedly installed between the air outlet channel (16), the branch pipe (17) and the branch pipe (18). The air outlet channel (16), the branch pipe (17) and the branch pipe (18) are connected by an electric three-way valve (4). A three-way pipe (9) is fixedly installed at one end of the electric three-way valve (8). One end of the branch pipe (18) is fixedly connected to one end of the three-way pipe (9). A check valve (10) is fixedly installed at the other end of the three-way pipe (9). The main cyclone separator (1) is fed with liquid and first performs gas-liquid separation. Both the electric three-way valve one (4) and the electric three-way valve three (8) are switched to the state of closing the branch pipe one (17). When the liquid level of the main cyclone separator (1) reaches the set upper liquid level H, the main cyclone separator (1) stops feeding liquid, the auxiliary cyclone separator (2) is fed with liquid and performs gas-liquid separation. The control system closes the auxiliary liquid outlet pipe (203), the main liquid outlet pipe (103) is unobstructed, and the liquid separated in the main cyclone separator (1) enters the liquid outlet channel (19) for detection. The separated gas The gas is detected through the outlet channel (16) and the second branch pipe (18) and then flows into the production manifold. When the liquid level of the secondary cyclone separator (2) reaches the set upper liquid level H, the secondary cyclone separator (2) stops feeding liquid, the main cyclone separator (1) feeds liquid and performs gas-liquid separation, the control system closes the main outlet pipe, the secondary outlet pipe is unobstructed, the liquid separated in the secondary cyclone separator (2) enters the outlet channel (19) for detection, and the separated gas is detected through the outlet channel (16) and the second branch pipe (18) and then flows into the production manifold. The internal structure of the main cyclone separator (1) is the same as that of the auxiliary cyclone separator (2). A riser pipe (105) is inserted through the top of the main cyclone separator (1). A liquid baffle (106) is fixedly installed inside the top of the main cyclone separator (1). The liquid baffle (106) is sleeved outside the riser pipe (105). The lower end of the liquid baffle (106) is on the same plane as the lower end of the riser pipe (105), and the horizontal height of the main feed pipe (101) is higher than the horizontal height of the lower end of the liquid baffle (106).

2. The three-phase metering skid for boosting oil, gas and water mixed transportation according to claim 1, characterized in that: It also includes a feed manifold (20), and an electric three-way valve four (11) is fixedly installed between the main feed pipe (101), the auxiliary feed pipe (201) and the feed manifold (20). The main feed pipe (101), the auxiliary feed pipe (201) and the feed manifold (20) are connected through the electric three-way valve four (11).

3. The three-phase metering skid for boosting oil, gas and water mixed transportation according to claim 2, characterized in that: A tee pipe two (12) is fixedly installed between the main sewage pipe (104) and the auxiliary sewage pipe (204), and the main sewage pipe (104) and the auxiliary sewage pipe (204) are connected through the tee pipe two (12).

4. The three-phase metering skid for boosting oil, gas and water mixed transportation according to claim 3, characterized in that: One end of the electric three-way valve 2 (5), one end of the electric three-way valve 4 (11), one end of the three-way pipe 2 (12), and one end of the three-way pipe 3 (14) are all fixedly installed with quick-connect sleeves (13). One end of the auxiliary liquid outlet pipe (203), one end of the auxiliary feed pipe (201), one end of the auxiliary sewage pipe (204), and one end of the auxiliary air outlet pipe (202) are all fixedly installed with quick connectors (15). Each of the quick-connect sleeves (13) is respectively fitted onto the corresponding quick connector (15).

5. The three-phase metering skid for boosting oil, gas and water mixed transportation according to claim 4, characterized in that: The quick-connect sleeve (13) includes a quick-connect sleeve shell (131), a movable sleeve (132), and a spring (133). The outer wall of the quick-connect sleeve shell (131) and the interior of the movable sleeve (132) are provided with spring grooves. The spring (133) is located at the position where the two spring grooves overlap. One end of the quick-connect sleeve shell (131) is provided with a sleeve groove. One end of the quick-connect sleeve shell (131) is provided with a plurality of ball holes in a ring array. Locking beads (134) are slidably installed in the plurality of ball holes. A limiting stop ring (136) is sleeved on the outer wall of one end of the quick-connect sleeve shell (131). An annular groove (135) is provided on the inner wall of one end of the movable sleeve (132). The quick connector (15) includes a quick connector shell (151). An annular groove (152) is provided on the outer wall of the quick connector shell (151).

6. The three-phase metering skid for boosting oil, gas and water mixed transportation according to claim 5, characterized in that: The diameter of the sleeve groove is smaller than the outer diameter of the quick connector shell (151), and a sealing ring (137) is fixedly installed on the inner wall of the sleeve groove.

7. The three-phase metering skid for boosting oil, gas and water mixed transportation according to claim 6, characterized in that: Both the quick-connect sleeve (131) and the quick-connect housing (151) are equipped with self-sealing components. The self-sealing components include a fixed sleeve (154), a movable part (153), a beveled ring (157), and a second spring (155). The movable part (153) includes a long rod, a conical part, and a short rod. The long rod is fixedly connected to one end of the conical part, and the short rod is fixedly connected to the other end of the conical part. The long rod passes through the fixed sleeve (154). The second spring (155) is sleeved on the long rod and is located between the fixed sleeve (154) and the conical part. A sealing gasket (156) is fixedly connected to the beveled surface of the conical part. The beveled surface of the beveled ring (157) is opposite to the beveled surface of the conical part, and the sealing gasket (156) is attached to the beveled surface of the beveled ring (157). The short rod passes through the middle of the beveled ring (157).

8. The three-phase metering skid for boosting oil, gas and water mixed transportation according to claim 7, characterized in that: An isolation plate (107) is fixedly installed at the bottom of the main cyclone separator (1), and the main outlet pipe (103) is located below the isolation plate (107).

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