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

Abstract

The invention discloses an oil-gas-water mixed transportation pressurization three-phase metering sledge, and relates to the technical field of oil well liquid three-phase metering, and the technical scheme is that the oil-gas-water mixed transportation pressurization three-phase metering sledge comprises a main cyclone separator, a gas outlet channel, a first branch pipe and a liquid outlet channel, and the main cyclone separator is fixedly provided with a main feeding pipe, a main gas outlet pipe, a main liquid outlet pipe and a main blow-off pipe; a liquid level meter is arranged in the main cyclone separator, the main gas outlet pipe is communicated with a gas outlet channel, the main liquid outlet pipe is communicated with a liquid outlet channel, the liquid outlet channel is sequentially provided with a mass flow meter, a water content analyzer and a third electric three-way valve from one end to the other end, and the gas outlet channel is provided with a pressure meter and a gas flow meter. According to the oil well flow measurement device, switching of the electric three-way valve can be controlled back and forth, so that the liquid level and the pressure of a system are controlled, the oil well yield and the water content are measured, and the stability of the measurement result and the technological process is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of three-phase metering of oil well fluids, and more specifically to an oil-gas-water mixed transportation and boosting three-phase metering skid. Background Art

[0002] During the oilfield development process, accurately obtaining the oil, gas, and water volumes of oil wells and calculating parameters such as the water cut and gas-oil ratio of oil wells are important bases for formulating oil well production increase measures and compiling development adjustment plans. Accurately measuring the three-phase flow rates of oil, gas, and water through a three-phase metering device can help oilfield enterprises better understand the production status of oil wells and optimize production management.

[0003] In existing three-phase metering devices, a hydrocyclone is used to separate gas and liquid from oil well fluids. The hydrocyclone needs to discharge liquid at an appropriate liquid level, and the appropriate liquid level helps to maintain the pressure stability inside the separator. Too high or too low a liquid level will break the pressure balance between the gas and liquid phases inside the separator, which may cause pressure fluctuations and affect the stability of the entire process flow. Existing three-phase metering devices cannot ensure that the oil well fluids are discharged at an appropriate liquid level after separation, and cannot ensure the stability of the process flow. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide an oil-gas-water mixed transportation and boosting three-phase metering skid. By setting a liquid level gauge to detect the liquid level inside the main hydrocyclone in real time, and setting an electric three-way valve to connect the gas outlet channel and the liquid outlet channel, setting the upper and lower liquid level control limits: the upper liquid level H high and the lower liquid level H low. The liquid level gauge measures the liquid level in the main hydrocyclone 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 liquid level gauge switches the state of the electric three-way valve through the control system, closes the gas outlet channel, and opens the liquid outlet channel. The separated liquid enters the production manifold after the liquid volume and water cut are measured by a mass flow meter and a water cut analyzer through the liquid outlet channel. When the liquid level drops to the lower liquid level H low, the liquid level gauge switches the state of the electric three-way valve again through the control system to measure the gas again. In this way, by controlling the switching of the electric three-way valve back and forth, the liquid level, pressure of the control system, and the oil well production and water cut are measured to ensure the stability of the measurement results and the process flow.

[0005] To achieve the above object, the present invention provides the following technical solutions: An oil-gas-water mixed transportation and boosting three-phase metering skid, comprising a main cyclone separator, an air outlet channel, a first branch pipe and a liquid outlet channel. A main feed pipe, a main air outlet pipe, a main liquid outlet pipe and a main sewage discharge pipe are fixedly installed on the main cyclone separator. A liquid level gauge is arranged inside the main cyclone separator. The main air outlet pipe is communicated with the air outlet channel, and the main liquid outlet pipe is communicated with the liquid outlet channel. A mass flowmeter, a water cut analyzer and an electric three-way valve III are sequentially installed on the liquid outlet channel from one end to the other end. A pressure gauge and a gas flowmeter are installed on the air outlet channel. One end of the first branch pipe is communicated with the air outlet channel, and the other end of the first branch pipe is connected with one end of the electric three-way valve III.

[0006] As a further improvement of the present invention, an oil-gas-water mixed transportation and boosting three-phase metering skid further comprises a secondary cyclone separator, an electric three-way valve II, a three-way pipe III and a second branch pipe. A secondary feed pipe, a secondary air outlet pipe, a secondary liquid outlet pipe and a secondary sewage discharge pipe are fixedly installed on the secondary cyclone separator. 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 communicated 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 communicated through the three-way pipe III. An electric three-way valve I is fixedly installed among the air outlet channel, the first branch pipe and the second branch pipe. The air outlet channel, the first branch pipe and the second branch pipe are communicated through the electric three-way valve I. One end of the electric three-way valve III is fixedly installed with a three-way pipe I. One end of the second branch pipe is fixedly connected with one end of the three-way pipe I. A check valve is fixedly installed at the other end of the three-way pipe I.

[0007] As a further improvement of the present invention, an oil-gas-water mixed transportation and boosting three-phase metering skid further comprises a feed main pipe. An electric three-way valve IV is fixedly installed among the main feed pipe, the secondary feed pipe and the feed main pipe. The main feed pipe, the secondary feed pipe and the feed main pipe are communicated through the electric three-way valve IV.

[0008] As a further improvement of the present invention, a three-way pipe II is fixedly installed between the main sewage discharge pipe and the secondary sewage discharge pipe. The main sewage discharge pipe and the secondary sewage discharge pipe are communicated through the three-way pipe II.

[0009] As a further improvement of the present invention, quick-connect sleeves are fixedly installed at one end of the electric three-way valve II, one end of the electric three-way valve IV, one end of the three-way pipe II and one end of the three-way pipe III. Quick connectors are fixedly installed at one end of the secondary liquid outlet pipe, one end of the secondary feed pipe, one end of the secondary sewage discharge pipe and one end of the secondary air outlet pipe. Each of the quick-connect sleeves is sleeved on the corresponding quick connector.

[0010] As a further improvement of the present invention, the quick-connect sleeve includes a quick-connect sleeve housing, a movable sleeve and a first spring. Spring grooves are provided on the outer wall of the quick-connect sleeve housing and inside the movable sleeve. The first spring is arranged at the position where the two spring grooves coincide. A socket groove is provided at one end of the quick-connect sleeve housing. A plurality of ball holes are arranged in an annular array at one end of the quick-connect sleeve housing. Locking beads are slidably installed in the plurality of ball holes. A limiting retaining ring is sleeved on the outer wall at one end of the quick-connect sleeve housing. A first annular groove is provided on the inner wall at one end of the movable sleeve. The quick-connect head includes a quick-connect head housing, and a second annular groove is provided on the outer wall of the quick-connect head housing.

[0011] As a further improvement of the present invention, the diameter of the socket groove is smaller than the outer diameter of the quick-connect head housing, and a sealing ring is fixedly installed on the inner wall of the socket groove.

[0012] As a further improvement of the present invention, self-sealing components are provided inside both the quick-connect sleeve housing and the quick-connect head housing. The self-sealing component includes a fixed sleeve, a movable member, an inclined surface ring and a second spring. The movable member includes a long rod, a conical member and a short rod. The long rod is fixedly connected to one end of the conical member. The short rod is fixedly connected to the other end of the conical member. The long rod passes through the fixed sleeve. The second spring is sleeved on the long rod and is arranged between the fixed sleeve and the conical member. A sealing gasket is fixedly connected to the inclined surface of the conical member. The inclined surface of the inclined surface ring is arranged opposite to the inclined surface of the conical member, and the sealing gasket is attached to the inclined surface of the inclined surface ring. The short rod passes through the middle of the inclined surface ring.

[0013] As a further improvement of the present invention, the internal structure of the main cyclone separator is the same as that of the secondary cyclone separator. An air riser is inserted through the top of the main cyclone separator. A liquid baffle is fixedly installed at the top inside the main cyclone separator. The liquid baffle is sleeved outside the air riser. The lower end of the liquid baffle is in the same plane as the lower end of the air riser, and the horizontal height of the main feed pipe is higher than the horizontal height of the lower end of the liquid baffle.

[0014] As a further improvement of the present invention, a partition plate is fixedly installed at the bottom inside the main cyclone separator. The main liquid outlet pipe is arranged below the partition plate.

[0015] The beneficial effects of the present invention: 1. By setting a liquid level gauge to detect the liquid level in the main cyclone separator in real time, setting an electric three-way valve to connect the gas outlet channel and the liquid outlet channel, and setting the upper and lower limits of liquid level control: the upper liquid level H high and the lower liquid level H low. The liquid 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. When the liquid level accumulates to the set upper liquid level H high, the liquid level gauge switches the state of the electric three-way valve through the control system, closes the gas outlet channel, and opens the liquid outlet channel. The separated liquid enters the production manifold after the liquid volume and water content are measured by the mass flow meter and the water content analyzer through the liquid outlet channel. When the liquid level drops to the lower liquid level H low, the liquid level gauge switches the state of the electric three-way valve again through the control system and measures the gas again. In this way, by controlling the switching of the electric three-way valve back and forth, the liquid level, pressure of the control system, and the oil well production and water content are measured to ensure the stability of the measurement results and the technological process.

[0016] 2. By setting a secondary cyclone separator, when the liquid level of the main cyclone separator reaches the set upper liquid level H high, the control system closes the secondary liquid outlet pipe, and the main liquid outlet pipe 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 the branch pipe two and then flows into the production manifold. When the liquid level of the secondary cyclone separator reaches the set upper liquid level H high, the control system closes the main liquid outlet pipe, and the secondary liquid outlet pipe is unobstructed. The liquid separated in the secondary cyclone separator enters the liquid outlet channel for detection, and the separated gas is detected through the gas outlet channel and the branch pipe two and then flows into the production manifold. Through the above structural settings, it is ensured that the liquid path and the gas path are always unobstructed, and each detection device is always working, greatly improving the measurement efficiency.

[0017] 3. Through the structural settings of the quick-connect sleeve and the quick connector, the installation and disassembly speed between pipelines is greatly improved, and the pipeline can be automatically sealed after separation, facilitating the disassembly and assembly of the cyclone separator and facilitating the switching between the single cyclone separator working mode and the double cyclone separator working mode of the present invention. Brief Description of the Drawings

[0018] Figure 1 It is a schematic connection structure diagram of the main cyclone separator of the present invention; Figure 2 It is a side view of the main cyclone separator of the present invention; Figure 3 It is a three-dimensional structure schematic diagram of an oil-gas-water mixed transportation and boosting three-phase metering skid of the present invention; Figure 4 It is a three-dimensional structure schematic diagram of the secondary cyclone separator of the present invention; Figure 5 It is a three-dimensional structure schematic diagram of the secondary liquid outlet pipe of the present invention; Figure 6Schematic three-dimensional structure diagram of the auxiliary exhaust pipe of the present invention; Figure 7 Schematic cross-sectional structure diagram of the quick-connect sleeve of the present invention; Figure 8 Schematic cross-sectional structure diagram of the quick-connector of the present invention; Figure 9 Schematic cross-sectional structure diagram of the main cyclone separator of the present invention.

[0019] Reference numerals: 1, main cyclone separator; 101, main feed pipe; 102, main exhaust pipe; 103, main liquid discharge pipe; 104, main sewage discharge pipe; 105, riser pipe; 106, liquid baffle; 107, partition plate; 2, auxiliary cyclone separator; 201, auxiliary feed pipe; 202, auxiliary exhaust pipe; 203, auxiliary liquid discharge pipe; 204, auxiliary sewage discharge pipe; 3, gas flow meter; 4, electric three-way valve I; 5, electric three-way valve II; 6, mass flow meter; 7, water content analyzer; 8, electric three-way valve III; 9, three-way pipe I; 10, check valve; 11, electric three-way valve IV; 12, three-way pipe II; 13, quick-connect sleeve; 131, quick-connect sleeve housing; 132, movable sleeve; 133, spring I; 134, locking bead; 135, annular groove I; 136, limit retaining ring; 137, sealing ring; 14, three-way pipe III; 15, quick-connector; 151, quick-connector housing; 152, annular groove II; 153, movable part; 154, fixed sleeve; 155, spring II; 156, sealing gasket; 157, inclined plane ring; 16, gas outlet channel; 17, branch pipe I; 18, branch pipe II; 19, liquid outlet channel; 20, feed main pipe. Detailed implementation manners

[0020] To make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. Apparently, the described embodiments are only some, but not all, of the embodiments of the present disclosure. The components of the embodiments of the present disclosure described and illustrated herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present disclosure is not intended to limit the scope of the present disclosure claimed, but merely represents selected embodiments of the present disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of the present disclosure without creative efforts fall within the scope of protection of the present disclosure.

[0021] Refer to Figure 1 and Figure 2As shown in the figure, the present invention discloses a three-phase metering skid for boosting the mixed transportation of oil, gas and water, which includes a main cyclone separator 1, an air outlet channel 16, a first branch pipe 17 and a liquid outlet channel 19. A main feed pipe 101, a main gas outlet pipe 102, a main liquid outlet pipe 103 and a main sewage discharge pipe 104 are fixedly installed on the main cyclone separator 1. A liquid level gauge is arranged inside the main cyclone separator 1. The main gas outlet pipe 102 is communicated with the air outlet channel 16, and the main liquid outlet pipe 103 is communicated with the liquid outlet channel 19. A mass flowmeter 6, a water cut analyzer 7 and an electric three-way valve III 8 are sequentially installed on the liquid outlet channel 19 from one end to the other end. A pressure gauge and a gas flowmeter 3 are installed on the air outlet channel 16. One end of the first branch pipe 17 is communicated with the air outlet channel 16, and the other end of the first branch pipe 17 is connected with one end of the electric three-way valve III 8. The liquid level gauge and the electric three-way valve III 8 are both connected with the control system. According to the production working conditions, the upper and lower limits of liquid level control are set: the upper liquid level H high and the 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 III 8 closes the liquid outlet channel 19, and the separated gas flows into the production manifold through the air outlet channel 16, the gas flowmeter 3 and the electric three-way valve III 8. 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 III 8 through the control system, and the electric three-way valve III 8 switches to close the air outlet channel 16, and the liquid path is unblocked. The separated liquid enters the production manifold after the liquid volume and water cut are measured by the mass flowmeter 6 and the water cut analyzer 7 through the liquid outlet channel 19. When the liquid level drops to the lower liquid level H low, the liquid level gauge sends a signal to the electric three-way valve III 8 again through the control system, and the electric three-way valve III 8 switches back to the gas path to measure the gas again. The liquid level gradually accumulates. When it rises to the set upper liquid level H high again, the electric three-way valve III 8 switches again. By controlling the switching of the electric three-way valve III 8 back and forth like this, the liquid level, pressure of the control system, the oil well production and water cut are measured, and the stability of the measurement results and the technological process is ensured.

[0022] In a further embodiment, as Figures 3 - 6As shown in the figure, the present invention further includes a secondary cyclone separator 2, an electric three-way valve II 5, a three-way pipe III 14, and a branch pipe II 18. A secondary feed pipe 201, a secondary gas outlet pipe 202, a secondary liquid outlet pipe 203, and a secondary sewage discharge pipe 204 are fixedly installed on the secondary cyclone separator 2. The electric three-way valve II 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 through the electric three-way valve II 5. The three-way pipe III 14 is fixedly installed between the main gas outlet pipe 102, the secondary gas outlet pipe 202, and the gas outlet channel 16. The main gas outlet pipe 102, the secondary gas outlet pipe 202, and the gas outlet channel 16 are connected through the three-way pipe III 14. An electric three-way valve I 4 is fixedly installed between the gas outlet channel 16, the branch pipe I 17, and the branch pipe II 18. The gas outlet channel 16, the branch pipe I 17, and the branch pipe II 18 are connected through the electric three-way valve I 4. One end of the electric three-way valve III 8 is fixedly installed with a three-way pipe I 9. One end of the branch pipe II 18 is fixedly connected to one end of the three-way pipe I 9. A check valve 10 is fixedly installed at the other end of the three-way pipe I 9. When only the main cyclone separator 1 is used for gas-liquid separation, the gas path and the liquid path are alternately opened, and the gas phase flow rate and the liquid phase flow rate cannot be continuously measured, resulting in a low measurement efficiency. According to the above structure, the main cyclone separator 1 is fed with liquid and gas-liquid separation is first carried out. The electric three-way valve I 4 and the electric three-way valve III 8 are both switched to the state of closing the branch pipe I 17. When the liquid level in the main cyclone separator 1 reaches the set upper liquid level H high, the main cyclone separator 1 stops feeding liquid, and the secondary cyclone separator 2 is fed with liquid and gas-liquid separation is carried out. The control system closes the secondary liquid outlet pipe 203, and the main liquid outlet pipe 103 is unobstructed. The liquid separated in the main cyclone separator 1 enters the liquid outlet channel 19 for detection, and the separated gas passes through the gas outlet channel 16 and the branch pipe II 18 for detection and then flows into the production manifold. When the liquid level in the secondary cyclone separator 2 reaches the set upper liquid level H high, the secondary cyclone separator 2 stops feeding liquid, and the main cyclone separator 1 is fed with liquid and gas-liquid separation is carried out. The control system closes the main liquid outlet pipe 103, and 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 branch pipe II 18 for detection and then flows into the production manifold. Through the above structure, it is ensured that the liquid path and the gas path are always unobstructed, and each detection device is always working, greatly improving the measurement efficiency.

[0023] In a further embodiment, the present invention further includes a main feed pipe 20. An electric three-way valve four 11 is fixedly installed between the main feed pipe 101, the auxiliary feed pipe 201 and the main feed pipe 20. The main feed pipe 101, the auxiliary feed pipe 201 and the main feed pipe 20 are connected through the electric three-way valve four 11. The main feed pipe 20 feeds materials. By controlling the electric three-way valve four 11 through a control system, the connection state between the main feed pipe 101 and the auxiliary feed pipe 201 is switched, and liquid is alternately fed into the main cyclone separator 1 and the auxiliary cyclone separator 2, ensuring that no liquid is fed into the cyclone separator in the measurement state, ensuring the stability of the liquid state in the cyclone separator, and improving the measurement effect. A three-way pipe two 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 through the three-way pipe two 12, facilitating synchronous drainage of the main cyclone separator 1 and the auxiliary cyclone separator 2.

[0024] In a further embodiment, quick-connect sleeves 13 are fixedly installed at one end of the electric three-way valve two 5, one end of the electric three-way valve four 11, one end of the three-way pipe two 12 and one end of the three-way pipe three 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 drain pipe 204 and one end of the auxiliary gas outlet pipe 202. Each of the quick-connect sleeves 13 is sleeved on the corresponding quick connector 15, facilitating the installation and disassembly of the auxiliary cyclone separator 2. As Figure 7 and Figure 8As shown in the figure, the quick-connect sleeve 13 includes a quick-connect sleeve housing 131, a movable sleeve 132 and a first spring 133. Spring grooves are provided on the outer wall of the quick-connect sleeve housing 131 and inside the movable sleeve 132. The first spring 133 is disposed at the position where the two spring grooves coincide. One end of the quick-connect sleeve housing 131 is provided with a socket groove, and a plurality of ball holes are arranged in an annular array at one end of the quick-connect sleeve housing 131. A locking bead 134 is slidably installed in each of the plurality of ball holes. A limiting retaining ring 136 is sleeved on the outer wall of one end of the quick-connect sleeve housing 131. A first annular groove 135 is provided on the inner wall of one end of the movable sleeve 132. The quick-connect fitting 15 includes a quick-connect fitting housing 151. A second annular groove 152 is provided on the outer wall of the quick-connect fitting housing 151. Under normal conditions, the first annular groove 135 and the locking bead 134 are out of alignment. The locking bead 134 protrudes from the inner wall of the quick-connect sleeve housing 131. The limiting retaining ring 136 limits the movable sleeve 132 to prevent the movable sleeve 132 from detaching from the quick-connect sleeve housing 131. When the quick-connect fitting 15 is connected to the quick-connect sleeve 13, the movable sleeve 132 is pushed to compress the first spring 133, so that the position of the first annular groove 135 corresponds to the position of the locking bead 134, and the locking bead 134 is in a movable state. The quick-connect fitting housing 151 is inserted into the socket groove. The quick-connect fitting housing 151 pushes the locking bead 134 outwards so that the locking bead 134 enters the first annular groove 135. After the quick-connect fitting housing 151 completely enters the socket groove, the movable sleeve 132 is released. The movable sleeve 132 is reset under the elastic force of the first spring 133. The movable sleeve 132 pushes the locking bead 134 into the second annular groove 152, and the locking bead 134 locks the quick-connect fitting housing 151. Through the settings of the quick-connect fitting 15 and the quick-connect sleeve 13, the secondary cyclone separator 2 can be quickly disassembled and assembled. The diameter of the socket groove is smaller than the outer diameter of the quick-connect fitting housing 151, and a sealing ring 137 is fixedly installed on the inner wall of the socket groove to seal the connection between the quick-connect fitting housing 151 and the quick-connect sleeve housing 131.

[0025] An internal self-sealing component is provided inside both the quick-connect housing 131 and the quick-connector housing 151. The self-sealing component includes a fixed sleeve 154, a movable member 153, an inclined surface ring 157, and a second spring 155. The fixed sleeve 154 and the inclined surface ring 157 are both fixedly installed on the inner wall of the corresponding housing. The movable member 153 includes a long rod, a conical member, and a short rod. The long rod is fixedly connected to one end of the conical member, and the short rod is fixedly connected to the other end of the conical member. The long rod passes through the fixed sleeve 154. The second spring 155 is sleeved on the long rod, and the second spring 155 is disposed between the fixed sleeve 154 and the conical member. A sealing gasket 156 is fixedly connected to the inclined surface of the conical member. The inclined surface of the inclined surface ring 157 is arranged opposite to the inclined surface of the conical member, and the sealing gasket 156 is attached to the inclined surface of the inclined surface ring 157. The short rod passes through the middle of the inclined surface ring 157. Under normal conditions, the second spring 155 is in a compressed state. The elastic force of the second spring 155 pushes the movable member 153 to press against the inclined surface ring 157, and the sealing gasket 156 tightly adheres to the inclined surface of the inclined surface ring 157. The pipelines on both sides of the inclined surface ring 157 are not connected. When an external force contacts the short rod and pushes the movable member 153, the movable member 153 compresses the second spring 155, and the sealing gasket 156 separates from the inclined surface of the inclined surface ring 157. The pipelines on both sides of the inclined surface ring 157 are connected. When this structure is provided at the end of the pipeline, it is ensured that when the two connected pipelines are separated, the end of the pipeline remains in a sealed state.

[0026] The internal structure of the main cyclone separator 1 is the same as that of the secondary cyclone separator 2. As Figure 9 shown, an air riser 105 is inserted through the top of the main cyclone separator 1. A liquid baffle 106 is fixedly installed at the top inside the main cyclone separator 1. The liquid baffle 106 is sleeved outside the air riser 105. The lower end of the liquid baffle 106 is in the same plane as the lower end of the air riser 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, preventing the liquid film on the cylinder wall from being discharged with the gas.

[0027] A partition plate 107 is fixedly installed at the bottom inside the main cyclone separator 1. The main liquid outlet pipe 103 is disposed below the partition plate 107, providing a contact surface where the end of the vortex continuously rotates, and at the same time separating the vortex area from the lower liquid pool, avoiding the influence of the tail of the vortex on the liquid at the lower part of the main cyclone separator 1 and the liquid separated to the wall surface. The part of the main liquid outlet pipe 103 extending into the main cyclone separator 1 is arranged in a siphon structure to ensure good sealing at the bottom of the main cyclone separator 1 and guarantee the separation effect.

[0028] Working principle: When the present invention operates in the single cyclone separator mode, the corresponding quick connector 15 and quick coupling 13 are separated, the secondary cyclone separator 2 is removed, and the upper and lower limits of liquid level control are set: the upper liquid level H high and the 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 III 8 closes the liquid outlet channel 19, and the separated gas flows into the production manifold through the gas outlet channel 16, gas flowmeter 3 and electric three-way valve III 8. 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 III 8 through the control system, and the electric three-way valve III 8 switches to close the gas outlet channel 16, and the liquid path is unobstructed. The separated liquid enters the production manifold after the liquid volume and water content are measured by the mass flowmeter 6 and water content analyzer 7 through the liquid outlet channel 19. When the liquid level drops to the lower liquid level H low, the liquid level gauge sends a signal to the electric three-way valve III 8 again through the control system, and the electric three-way valve III 8 switches back to the gas path, and the gas is measured again. The liquid level gradually accumulates, and when it rises to the set upper liquid level H high again, the electric three-way valve III 8 switches again. By controlling the switching of the electric three-way valve III 8 back and forth like this, the liquid level, pressure of the control system, and the production and water content of the oil well are measured.

[0029] When operating in the double cyclone separator mode, the corresponding quick connector 15 and quick coupling 13 are connected, the secondary cyclone separator 2 is installed, the main cyclone separator 1 is fed with liquid, and gas-liquid separation is first carried out. The electric three-way valve I 4 and the electric three-way valve III 8 are both switched to the state of closing the branch pipe I 17. When the liquid level in the main cyclone separator 1 reaches the set upper liquid level H high, the main cyclone separator 1 stops feeding liquid, the secondary cyclone separator 2 is fed with liquid, and gas-liquid separation is carried out. The control system closes the secondary liquid outlet pipe 203, and the main liquid outlet pipe 103 is unobstructed. The liquid separated in the main cyclone separator 1 enters the liquid outlet channel 19 for detection, and the separated gas is detected through the gas outlet channel 16 and branch pipe II 18 and then flows into the production manifold. When the liquid level in the secondary cyclone separator 2 reaches the set upper liquid level H high, the secondary cyclone separator 2 stops feeding liquid, the main cyclone separator 1 is fed with liquid, and gas-liquid separation is carried out. The control system closes the main liquid outlet pipe 103, and 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 is detected through the gas outlet channel 16 and branch pipe II 18 and then flows into the production manifold.

[0030] Finally, it should be noted that the above-described embodiments are only specific implementation manners of the present disclosure, used to illustrate the technical solutions of the present disclosure, rather than limiting them. The protection scope of the present disclosure is not limited thereto. Although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that any person skilled in the technical field of the present disclosure can still modify the technical solutions described in the foregoing embodiments, or can easily think of changes, or perform equivalent replacements on some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure, and should all be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A three-phase metering skid for mixed oil, gas and water transmission and pressurization, comprising a main cyclone separator (1), an air outlet channel (16), a branch pipe (17) and a liquid outlet channel (19), wherein a main feed pipe (101), a main air outlet pipe (102), a main liquid outlet pipe (103) and a main sewage pipe (104) are fixedly mounted on the main cyclone separator (1), characterized in that: A liquid level meter is provided inside the main cyclone separator (1); the main gas outlet pipe (102) is in communication with the gas outlet channel (16); the main liquid outlet pipe (103) is in communication with the liquid outlet channel (19); a mass flow meter (6), a water content analyzer (7) and an electric three-way valve (8) are installed in sequence from one end to the other end of the liquid outlet channel (19); 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 in communication with 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).

2. The three-phase metering skid for oil, gas and water mixed transportation and pressurization according to claim 1 is characterized by: It also comprises a secondary cyclone separator (2), a second electric three-way valve (5), a third three-way pipe (14) and a second branch pipe (18); the secondary cyclone separator (2) is fixedly mounted with a secondary feed pipe (201), a secondary gas outlet pipe (202), a secondary liquid outlet pipe (203) and a secondary sewage discharge pipe (204); the second electric three-way valve (5) is fixedly mounted 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 via the second electric three-way valve (5); the third three-way pipe (14) is fixedly mounted between the main gas outlet pipe (102), the secondary gas outlet pipe (203) and the liquid outlet channel (19); 2) and an air outlet channel (16), the main air outlet pipe (102), the auxiliary air outlet pipe (202) and the air outlet channel (16) are connected via 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 via the electric three-way valve (4), one end of the electric three-way valve (8) is fixedly installed with a three-way pipe (9), one end of the branch pipe (18) is fixedly connected to one end of the three-way pipe (9), and the other end of the three-way pipe (9) is fixedly installed with a check valve (10).

3. The three-phase metering skid for oil, gas and water mixed transportation and pressurization according to claim 2 is characterized by: It also comprises a main feed pipe (20), wherein an electric three-way valve four (11) is fixedly installed between the main feed pipe (101), the auxiliary feed pipe (201) and the main feed pipe (20), and the main feed pipe (101), the auxiliary feed pipe (201) and the main feed pipe (20) are connected via the electric three-way valve four (11).

4. The three-phase metering skid for oil, gas and water mixed transportation and pressurization according to claim 3 is characterized by: A second three-way pipe (12) is fixedly installed between the main sewage discharge pipe (104) and the auxiliary sewage discharge pipe (204), and the main sewage discharge pipe (104) and the auxiliary sewage discharge pipe (204) are connected via the second three-way pipe (12).

5. The three-phase metering skid for oil, gas and water mixed transportation and pressurization according to claim 4 is characterized by: 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 mounted with a quick-connect sleeve (13); one end of the auxiliary liquid outlet pipe (203), one end of the auxiliary feed pipe (201), one end of the auxiliary sewage discharge pipe (204) and one end of the auxiliary gas outlet pipe (202) are all fixedly mounted with a quick-connect sleeve (15); and each of the quick-connect sleeves (13) is respectively sleeved on a corresponding quick-connect sleeve (15).

6. The three-phase metering skid for oil, gas and water mixed transportation and pressurization according to claim 5 is characterized by: The quick-connect sleeve (13) comprises a quick-connect sleeve shell (131), a movable sleeve (132) and a spring 1 (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 1 (133) is arranged at a 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 an annular array. Locking beads (134) are slidably installed in the plurality of ball holes. A limit stop ring (136) is sleeved on the outer wall of one end of the quick-connect sleeve shell (131). An annular groove 1 (135) is provided on the inner wall of one end of the movable sleeve (132). The quick connector (15) comprises a quick connector shell (151). An annular groove 2 (152) is provided on the outer wall of the quick connector shell (151).

7. The three-phase metering skid for oil, gas and water mixed transportation and pressurization according to claim 6 is characterized by: 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 mounted on the inner wall of the sleeve groove.

8. The three-phase metering skid for oil, gas and water mixed transportation and pressurization according to claim 6 is characterized by: The interior of the quick-connect sleeve (131) and the interior of the quick-connect sleeve (151) are both provided with a self-sealing component, the self-sealing component comprising a fixed sleeve (154), a movable part (153), a bevel ring (157) and a second spring (155), the movable part (153) comprising a long rod, a conical part and a short rod, the long rod being fixedly connected to one end of the conical part, the short rod being fixedly connected to the other end of the conical part, the long rod passing through the fixed sleeve (154), the second spring (155) being sleeved on the long rod, and the second spring (155) being arranged between the fixed sleeve (154) and the conical part, a sealing gasket (156) being fixedly connected to the inclined surface of the conical part, the inclined surface of the bevel ring (157) being arranged opposite to the inclined surface of the conical part, and the sealing gasket (156) being fitted to the inclined surface of the bevel ring (157), and the short rod passing through the middle of the bevel ring (157).

9. The three-phase metering skid for oil, gas and water mixed transportation and pressurization according to claim 2 is characterized by: The internal structure of the main cyclone separator (1) is the same as the internal structure of the auxiliary cyclone separator (2); an air riser (105) is inserted into the top of the main cyclone separator (1); a liquid retaining cover (106) is fixedly installed on the top of the main cyclone separator (1); the liquid retaining cover (106) is sleeved on the outside of the air riser (105); the lower end of the liquid retaining cover (106) and the lower end of the air riser (105) are in the same plane, and the horizontal height of the main feed pipe (101) is higher than the horizontal height of the lower end of the liquid retaining cover (106).

10. The three-phase metering skid for oil, gas and water mixed transportation and pressurization according to claim 2 is characterized by: An isolation plate (107) is fixedly mounted on the bottom of the main cyclone separator (1), and the main liquid outlet pipe (103) is arranged below the isolation plate (107).

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