Unattended station automatic single-quantity digital integrated sledge and single-quantity control method

Abstract

The invention discloses an unattended station automatic single-quantity digital integrated skid, which is characterized in that a multi-way valve, a single-quantity instrument and an RTU (remote terminal unit) control box are fixedly arranged on a basic skid, and a plurality of input ports at the upper part of the multi-way valve are correspondingly connected with an oil incoming pipeline of a well group; a main oil outlet and a single-quantity outlet are externally formed in the lower part of the multi-way valve, the main oil outlet is externally communicated with an oil collecting pipeline, and the single-quantity outlet is externally communicated with a single-quantity instrument; an upper valve body and a rotary valve element are arranged in an inner cavity of the multi-way valve, a servo motor is fixedly installed on the upper portion of a shell of the multi-way valve, and the servo motor is provided with an electric driving mechanism. The electric driving mechanism is electrically connected with the RTU control box, the single measuring instrument is electrically connected with the RTU control box, and the RTU control box is connected with the terminal platform in real time. The invention further discloses an automatic single-quantity control method for the integrated sledge of the unattended station. The invention belongs to the technical field of oil and gas production gathering and transportation of an oil field, and solves the problem of low working efficiency of a station well group single quantity data manual acquisition mode in the prior art.

Description

Technical Field

[0001] This invention belongs to the field of oilfield oil and gas production and transportation technology, and relates to an automatic single-quantity digital integrated skid for unmanned stations. This invention also relates to an automatic single-quantity control method for the integrated skid of unmanned stations. Background Technology

[0002] As oilfields have been in operation for many years, surface gathering and transportation systems have become increasingly sophisticated, leading to a surge in the number of gathering and transportation stations. Consequently, the workload of station operation and management has increased, and the number of on-duty personnel at these stations has expanded rapidly. For conventional well groups receiving oil from the main control unit, a combination of single-volume manifolds, mixed-in manifolds, and metering devices is employed. Each well group is equipped with two manual valves: one for metering and the other for mixing before entering the collection tank. Metering of incoming oil from well groups relies on frequent manual switching of the oil flow process, resulting in high labor intensity and low work efficiency for operators.

[0003] Currently, the oilfield is promoting the construction and operation of unmanned stations as a whole. Some stations have completed the construction of unmanned stations. However, since most of the main stations in use use a metering method that requires manual switching, the automatic operation of unmanned stations has not formed a closed loop. A considerable number of stations and well groups still use on-site manual data copying, manual entry, and manual recording of single-volume reports. This results in problems such as inconsistent report formats, large data errors, and many manual calculation / entry errors. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic digital integration skid for unmanned stations, which solves the problem that in the existing technology, the data of station well groups is still collected by hand on site, manually entered, and manually recorded in the form of single-volume reports, which results in inconsistent report formats and large data errors.

[0005] Another objective of this invention is to provide an integrated skid-based automatic single-volume control method for unmanned stations, which solves the problem of low work efficiency caused by the manual collection of single-volume data for station well groups in the existing technology.

[0006] The technical solution adopted in this invention is an unmanned station automatic single-quantity digital integrated skid, including a base skid. A multi-way valve, a single-quantity instrument, and an RTU control box are fixedly installed on the upper surface of the base skid. The multi-way valve has multiple input ports on its upper part, and each input port is connected to the oil inlet pipeline of a well group. The lower part of the multi-way valve has a main oil outlet and a single-quantity outlet. The main oil outlet is connected to an oil collection pipeline, and the single-quantity outlet is connected to a single-quantity instrument. The inner cavity of the multi-way valve is provided with an upper valve body and a rotary valve core. A servo motor is fixedly installed on the upper part of the multi-way valve housing, and the servo motor is equipped with an electric drive mechanism. The electric drive mechanism is electrically connected to the RTU control box, the single-gauge instrument is electrically connected to the RTU control box, and the RTU control box is connected to the terminal platform in real time.

[0007] Another technical solution adopted in this invention is an automatic single-quantity control method for an unmanned station integrated skid, which relies on the above-mentioned unmanned station automatic single-quantity digital integrated skid and is implemented according to the following steps: First, the oil from the designated well group is introduced into the single-volume meter, and then the single volume is completed; Meanwhile, the oil from the other well groups flows through the flow holes of their respective upper valve bodies and enters the oil collection pipeline through the main oil outlet of the multi-way valve. Then, the single-volume instrument uploads the measured single-volume data to the RTU control box, which then transmits it to the terminal platform. The production analysis software calculates the cumulative difference by calculating the time of relative displacement between the rotary valve core and the upper valve body. The terminal platform completes the statistical calculation of the single-volume data and generates reports.

[0008] The beneficial effects of this invention are as follows: by modularizing the device and optimizing its planar layout, multi-way valves, single-meter instruments, and RTU control boxes (data transmission terminals) are integrated on the same platform, enabling automatic switching and metering of well group oil inflow processes, and achieving integrated skid-mounted automatic metering; by optimizing the structure of the multi-way valve equipment, functions such as ball passage, scale and wax prevention, and leakage prevention are achieved, forming a process flow that meets different operation types; at the same time, by developing an automatic production analysis platform and using RTU embedded edge algorithms to form an automatic single-meter control process for well groups, automatic production calculation and report generation are achieved, changing the traditional single-meter production measurement method and featuring automation, skid-mounting, and cost savings. Attached Figure Description

[0009] Figure 1 This is a top view of the device of the present invention; Figure 2 This is a front view of the device of the present invention; Figure 3 This is a process flow diagram of the device of the present invention; Figure 4 This is a schematic diagram of the internal structure and flow principle of the multi-way valve in the device of the present invention; Figure 5 This is a top view of the upper valve body in the device of the present invention.

[0010] In the diagram, 1. Incoming oil pipeline, 2. Station purging pipeline, 3. Emergency tank pipeline, 4. Oil collection pipeline, 5. Single-meter pipeline, 6. Multi-way valve, 7. Single-meter instrument, 8. Thermometer 1, 9. Pressure gauge 1, 10. Check valve, 11. RTU control box, 12. External purging pipeline, 13. Foundation skid, 14. Thermometer 2, 15. Pressure gauge 2, 16. Electric drive mechanism, 17. Upper valve body, 18. Rotary valve core, 19. Servo motor, 20. Drive shaft, 21. Shaft hole, 22. Flow hole, 23. Baffle, 24. Handle. Detailed Implementation

[0011] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0012] Reference Figure 1 , Figure 2 , Figure 3 The structure of the unmanned station automatic single-quantity digital integrated skid of the present invention includes a base skid 13 that can be hoisted and moved for transportation. A multi-way valve 6, a single-quantity instrument 7, an RTU control box 11, a servo motor 19, an electric drive mechanism 16, and other components are fixedly installed on the upper surface of the base skid 13. The multi-way valve 6 has multiple input ports on its upper part, and each input port is connected to the oil supply pipeline 1 of a well group. The lower part of the multi-way valve 6 is provided with a main oil outlet and a single-volume outlet. The main oil outlet is connected to the oil collection pipeline 4, and the single-volume outlet is connected to the single-volume meter 7. Reference Figure 4 , Figure 5 The inner cavity of the multi-way valve 6 is provided with a fixed upper valve body 17 and a rotatable rotary valve core 18. A servo motor 19 is fixedly installed on the upper part of the housing of the multi-way valve 6. The servo motor 19 is equipped with an electric drive mechanism 16. The upper valve body 17 has a ring of flow holes 22 spaced around its circumference. Each flow hole 22 is connected to the input port of the oil supply pipeline 1 of a well group. At the same time, a central hole 21 is opened at the center of the upper valve body 17. The rotary valve core 18 is fixed with a drive shaft 20, which passes upward through the axial hole 21 of the upper valve body 17 and is connected to the output shaft of the servo motor 19; a single-flow channel is opened inside the rotary valve core 18 (see...). Figure 4 (The arrow in the text passes through the area). The upper edge of the upper port of the single-flow channel can only be connected to one flow hole 22 of the upper valve body 17 at a time. A baffle 23 is provided on the inner edge of the upper port of the single-flow channel to block the rubber ball in the incoming oil. The lower port of the single-flow channel is sealed to the single-flow outlet to ensure that the rotary valve core 18 can only connect to the oil inlet pipeline 1 of one well group at a time, and can only divert the oil inlet of that well group to the single-flow outlet. That is, only the oil inlet of the selected well group is connected to the single-flow outlet of the multi-way valve 6, and only the single-flow operation of one well group is completed at a time. There is a gap between the rotary valve core 18 and the inner wall of the multi-way valve 6. This gap is used to divert all the oil inlet of the well group flowing into the other flow holes 22 of the upper valve body 17 to the main oil outlet (see Figure 4 (The hollow arrow in the image passes through the area) to perform normal oil collection operations; The output end of the servo motor 19 is connected to a crank 24 for manual emergency rotation of the transmission shaft 20 to adjust the circumferential position of the rotary valve core 18. Before connecting to the multi-way valve 6, the oil inlet pipeline 1 of each well group is connected to the external purging pipeline 12; the single-volume outlet of the multi-way valve 6 is connected to the inlet end of the single-volume instrument 7 through the single-volume pipeline 5. The single-volume pipeline 5 is equipped with a pressure gauge 9 and a thermometer 8 respectively, and the outlet end of the single-volume instrument 7 is then connected to the oil gathering pipeline 4. Pressure gauge 2 15 and thermometer 2 14 are installed on the main oil outlet pipeline of multi-way valve 6. The main oil outlet is divided into three branches. The first branch is connected to the oil collection pipeline 4 through the first station purge pipeline 2. The second branch is connected to the emergency tank pipeline 3 through the second station purge pipeline 2. The third branch is connected to the check valve 10 through the third station purge pipeline 2. The electric drive mechanism 16 is electrically connected to the RTU control box 11. The single measuring instrument 7, thermometer 8, and pressure gauge 9 are all electrically connected to the RTU control box 11. The RTU control box 11 is connected to the terminal platform in real time.

[0013] According to the action command of the RTU control box 11, the electric drive mechanism 16 operates the rotary valve core 18 to rotate a certain angle, connecting the input port of the oil inlet pipeline 1 of a designated well group to the single-volume outlet, so that only the oil inlet of one well group is output from the single-volume outlet, realizing the single metering of the designated well group; the oil inlet of other well groups enters the inner cavity of the multi-way valve 6 through their respective input ports and flows out through the main oil outlet, converging into the oil collection pipeline 4 to achieve normal output.

[0014] The basic structure of the multi-way valve 6 is based on the F-001 multi-way valve, the single measuring instrument 7 is based on the PE-002 single measuring device, and the RTU control box 11 is based on the PE-001 RTU control box.

[0015] The RTU control box 11 is pre-installed with control procedures including purging and single-volume measurement, enabling automatic switching and metering of the well group's incoming oil flow. The control procedure sends the designated metering well group number information to the electric drive mechanism 16. The electric drive mechanism 16 controls the servo motor 19 to rotate at a corresponding angle, driving the rotary valve core 18 in the multi-way valve 6 to perform circular motion, thereby selecting the incoming oil channel for the single-volume well group. Only one input port of the multi-way valve 6 is connected to the selected well group's incoming oil, and the selected single-volume well group's incoming oil flows through the rotary valve core 18 for single-volume measurement. The oil flows through the channel and then through the single-volume outlet of the multi-way valve 6 to the single-volume meter 7. The measurement data of the single-volume meter 7 is uploaded to the terminal platform in real time through the RTU control box 11. The production analysis software in the terminal platform calculates the cumulative difference by calculating the time of relative displacement between the rotary valve core 18 and the upper valve body 17. The oil from the currently selected single-volume well group flows through the single-volume meter 7 and then to the oil collection pipeline 4, and is output through the oil collection pipeline 4. The oil from other well groups directly enters the main oil outlet and flows into the oil collection pipeline 4 to complete the output, realizing remote process switching and automatic single-volume action.

[0016] The device of this invention is an integrated skid-mounted equipment for automatic switching and automatic metering of oil inflow process in well groups within a station, and can achieve the following functions: (1) The multi-way valve 6 is connected to the remote control system to realize remote automatic switching; (2) The internal structure of the multi-way valve 6 has been optimized and improved, and it has multiple functions such as ball passage, anti-scaling and anti-wax, and anti-leakage, as described below; ① Ball passage: The flow diameter of all oil inlet channels inside the multi-way valve 6 is greater than 50mm, which meets the ball passage size of the rubber ball on site; however, a baffle 23 is provided at the inlet of the single-volume channel in the rotary valve core 18. Its function is to allow the crude oil of the single-volume well group to enter the single-volume instrument 7, and to prevent the rubber ball from entering the single-volume channel, so as to avoid damaging the single-volume instrument 7.

[0017] ② Scale and wax prevention: Under normal circumstances, the RTU control box 11 is set to control the rotary valve core 18 to rotate to one position at set intervals, so that the multi-way valve 6 circulates and dispenses oil from different well groups. When the rotary valve core 18 of the multi-way valve 6 rotates at set intervals, it can scrape off the wax or scale adhering to the inside of the multi-way valve 6, thus preventing scale and wax. In special circumstances, a single-volume sampling of a specific well group is performed.

[0018] ③ Leakage prevention: A baffle 23 is provided at the inlet of the single-flow channel of the rotary valve core 18. The baffle 23 does not block the oil flow, but only blocks the rubber ball in the oil from the designated well group to prevent the rubber ball from entering the single-flow instrument 7. The baffle 23 is set in the rotary valve core 18 and will not affect the oil flow from other well groups or the rubber ball entering the inner cavity of the multi-way valve 6 through other flow holes 22.

[0019] The baffle 23 is made of 316L stainless steel with a surface roughness of Ra0.8. The upper valve body 17 and the rotary valve core 18 are both made of Stellite 21 material with a flatness of 0.01mm and a roughness of Ra0.2. They fit tightly, greatly reducing leakage and preventing crude oil from other well groups from flowing into the single-volume channel, thus effectively improving the accuracy of the single volume.

[0020] (3) Optimize the process flow to meet the needs of different work types: First, it enables automatic switching of process timing and well group, which can be performed automatically even in the event of a network outage. Secondly, production analysis software is pre-set in the terminal platform. The measurement data of the single meter 7 is automatically uploaded to the terminal platform. The terminal platform then calculates the production of the specified well group based on the liquid volume and water content, and automatically generates reports.

[0021] The present invention provides an integrated skid-mounted automatic single-quantity control method for unmanned stations, which is implemented using the aforementioned device according to the following process: Method 1: Perform single-volume operation on a designated well group: Introduce the oil from the designated well group into the single-volume meter 7, and then complete the single-volume measurement; First, oil from each well group enters the different input ports of the multi-way valve 6 through its respective oil supply pipeline 1. After the terminal platform issues a selection command for the oil from the well group, the RTU control box 11 issues an action command for the specific well group number to the electric drive mechanism 16. The electric drive mechanism 16 controls the servo motor 19 to rotate at the corresponding angle, driving the rotary valve core 18 to rotate until the upper port of the single-volume channel of the rotary valve core 18 is aligned and connected with the flow hole 22 of the upper valve body 17 corresponding to the selected oil from the well group. The oil from the selected well group flows through the oil supply pipeline 1 into the single-volume channel in the rotary valve core 18, and then through the single-volume outlet at the bottom of the multi-way valve 6 along the single-volume pipeline 5 into the single-volume meter 7. After the single-volume meter 7 completes the single-volume measurement, it enters the oil collection pipeline 4. Meanwhile, the oil from the other well groups flows through the flow holes 22 of their respective upper valve bodies 17 and flows out through the main oil outlet of the multi-way valve 6, and is collected into the oil collection pipeline 4. Then, the single-volume meter 7 uploads the measured single-volume data to the RTU control box 11. The thermometer 8 and pressure gauge 9 collect data as needed, and the RTU control box 11 transmits the data to the terminal platform. The production analysis software calculates the time of relative displacement between the rotary valve core 18 and the upper valve body 17 (because the rotary valve core 18 passes through the lower end face of the upper valve body 17 between the two flow holes 22 during rotation, the flow will have a short interruption, and the flow will be discontinuous at this time), calculates the cumulative difference, and the terminal platform completes the statistical calculation of the single-volume data and generates reports. Method 2: Implement off-site purging: First, the RTU control box 11 sends a control signal to the electric drive mechanism 16. The electric drive mechanism 16 drives the rotary valve core 18 to rotate through the servo motor 19. The single-channel of the rotary valve core 18 is not connected to any of the flow holes 22 of the upper valve body 17, which is equivalent to closing all the inlets of the multi-way valve 6. Then, the purging fluid for each well group is purged through the inlet of each well group and directly enters the purging tanker through the external purging pipeline 12 via each oil pipeline 1. Method 3: Conduct in-station purging: First, the RTU control box 11 sends a control signal to the electric drive mechanism 16. The electric drive mechanism 16 drives the rotary valve core 18 to rotate through the servo motor 19. The single-channel of the rotary valve core 18 is not connected to any of the flow holes 22 of the upper valve body 17, which is equivalent to closing all the inlets of the multi-way valve 6. Then, the pipelines of the accident tank line 3 and the single meter 7 are closed. The station purging fluid enters from the single flow valve 10, enters the oil collection line 4 through the station purging pipeline 2, and achieves the purpose of purging the station pipelines.

[0022] Example 1 Based on the aforementioned structure of the device of the present invention, an integrated skid-mounted equipment for automatic switching and automatic metering of oil inflow process in the well group within the station, as described in Example 1, is constructed: it includes a base skid 13 that can be hoisted and moved for transportation, and components such as a multi-way valve 6, a single meter 7, and an RTU control box 11 are fixedly installed on the upper surface of the base skid 13. The multi-way valve 6 has multiple input ports on its upper part, and each input port is connected to the oil supply pipeline 1 of a well group. The lower part of the multi-way valve 6 is provided with a main oil outlet and a single-volume outlet. The main oil outlet is connected to the oil collection pipeline 4, and the single-volume outlet is connected to the single-volume meter 7. The inner cavity of the multi-way valve 6 is provided with an upper valve body 17 and a rotary valve core 18. A servo motor 19 is fixedly installed on the upper part of the housing of the multi-way valve 6. The servo motor 19 is equipped with an electric drive mechanism 16. Before connecting to the multi-way valve 6, the oil inlet pipeline 1 of each well group is connected to the external purging pipeline 12; the single-volume outlet of the multi-way valve 6 is connected to the inlet end of the single-volume instrument 7 through the single-volume pipeline 5. The single-volume pipeline 5 is equipped with a pressure gauge 9 and a thermometer 8 respectively, and the outlet end of the single-volume instrument 7 is then connected to the oil gathering pipeline 4. Pressure gauge 2 15 and thermometer 2 14 are installed on the main oil outlet pipeline of multi-way valve 6. The main oil outlet is divided into three branches. The first branch is connected to the oil collection pipeline 4 through the first station purge pipeline 2. The second branch is connected to the emergency tank pipeline 3 through the second station purge pipeline 2. The third branch is connected to the check valve 10 through the third station purge pipeline 2. The electric drive mechanism 16 is electrically connected to the RTU control box 11. The single measuring instrument 7, thermometer 8, and pressure gauge 9 are all electrically connected to the RTU control box 11. The RTU control box 11 is connected to the terminal platform in real time.

[0023] Set the relevant process parameters: 1) The design parameters of the equipment are determined as follows: Design pressure: ≤2.5MPa; Design temperature: -20~55℃; Well group specifications: 8, 10, and 14 well types; Metering design scale: 45~240m 3 / d; Overall dimensions: 3.6 × 6.9 × 1.78 m; Overall weight: 3900kg.

[0024] 2) Three configurations of skid-mounted integrated modular technology series are formed:

[0025] 4) A baffle 23 is installed at the inlet of the rotary valve core 18 to block the rubber ball and prevent the rubber ball of the well group from entering the metering port through the single-volume channel of the rotary valve core 18, which would cause the single-volume meter inlet to be blocked. The baffle 23 is made of 316L stainless steel, is shaped like a "rice" and has a smooth surface with a roughness of Ra0.8.

[0026] 5) The surface alloy material of the upper valve body 17 and the rotary valve core 18 was optimized. Stellite 21 was used as the surface material of the upper valve body 17 and the rotary valve core 18. This reduced the flatness of the upper valve body 17 from 0.05mm to 0.01mm, the flatness of the rotary valve core 18 from 20μm to 2μm, the rotary positioning accuracy from ±1.6° to ±0.5°, the surface finish from Ra0.8 to Ra0.2, and the rotary sealing gap from 10mm to 5mm. Through indoor testing, the leakage of the multi-way valve 6 was 1.31ml / min, which is significantly less than the technical requirement of 5.0ml / min.

[0027] Example 2 Based on the aforementioned structure of the device of the present invention, an integrated skid-mounted equipment for automatic switching and automatic metering of oil inflow process in the well group within the station, as described in Example 2, is constructed: it includes a base skid 13 that can be hoisted and moved for transportation, and components such as a multi-way valve 6, a single meter 7, and an RTU control box 11 are fixedly installed on the upper surface of the base skid 13. The multi-way valve 6 has multiple input ports on its upper part, and each input port is connected to the oil supply pipeline 1 of a well group. The lower part of the multi-way valve 6 is provided with a main oil outlet and a single-volume outlet. The main oil outlet is connected to the oil collection pipeline 4, and the single-volume outlet is connected to the single-volume meter 7. The inner cavity of the multi-way valve 6 is provided with an upper valve body 17 and a rotary valve core 18. A servo motor 19 is fixedly installed on the upper part of the housing of the multi-way valve 6. The servo motor 19 is equipped with an electric drive mechanism 16. Before connecting to the multi-way valve 6, the oil inlet pipeline 1 of each well group is connected to the external purging pipeline 12; the single-volume outlet of the multi-way valve 6 is connected to the inlet end of the single-volume instrument 7 through the single-volume pipeline 5. The single-volume pipeline 5 is equipped with a pressure gauge 9 and a thermometer 8 respectively, and the outlet end of the single-volume instrument 7 is then connected to the oil gathering pipeline 4. Pressure gauge 2 15 and thermometer 2 14 are installed on the main oil outlet pipeline of multi-way valve 6. The main oil outlet is divided into three branches. The first branch is connected to the oil collection pipeline 4 through the first station purge pipeline 2. The second branch is connected to the emergency tank pipeline 3 through the second station purge pipeline 2. The third branch is connected to the check valve 10 through the third station purge pipeline 2. The electric drive mechanism 16 is electrically connected to the RTU control box 11. The single measuring instrument 7, thermometer 8, and pressure gauge 9 are all electrically connected to the RTU control box 11. The RTU control box 11 is connected to the terminal platform in real time.

[0028] Set the relevant process parameters: 1) Equipment design parameters: Design pressure: ≤2.5MPa; Design temperature: -20~55℃; Well group specifications: 10 wells; Design scale: 180m 3 / d; Overall dimensions: 3.6 × 6.9 × 1.78 m; Overall weight: 3900kg.

[0029] 2) Data transmission status: ① The actual fluid volume of the well group is 15~19 m³ / d, while the fluid volume uploaded by the system is 16~18 m³ / d. It can be seen that the average data consistency rate is 98.1%.

[0030] ② The actual water cut of the well group is 13.8%, and the water cut uploaded by the system is 14.3%. It can be seen that the average data load rate is 97.6%.

[0031] Example 3 Based on the aforementioned structure of the device of the present invention, an integrated skid-mounted equipment for automatic switching and automatic metering of the oil inflow process of the well group in the station, as described in Example 3, is constructed: it includes a base skid 13 that can be hoisted and moved for transportation, and components such as a multi-way valve 6, a single meter 7, and an RTU control box 11 are fixedly installed on the upper surface of the base skid 13. The multi-way valve 6 has multiple input ports on its upper part, and each input port is connected to the oil supply pipeline 1 of a well group. The lower part of the multi-way valve 6 is provided with a main oil outlet and a single-volume outlet. The main oil outlet is connected to the oil collection pipeline 4, and the single-volume outlet is connected to the single-volume meter 7. The inner cavity of the multi-way valve 6 is provided with an upper valve body 17 and a rotary valve core 18. A servo motor 19 is fixedly installed on the upper part of the housing of the multi-way valve 6. The servo motor 19 is equipped with an electric drive mechanism 16. Before connecting to the multi-way valve 6, the oil inlet pipeline 1 of each well group is connected to the external purging pipeline 12; the single-volume outlet of the multi-way valve 6 is connected to the inlet end of the single-volume instrument 7 through the single-volume pipeline 5. The single-volume pipeline 5 is equipped with a pressure gauge 9 and a thermometer 8 respectively, and the outlet end of the single-volume instrument 7 is then connected to the oil gathering pipeline 4. Pressure gauge 2 15 and thermometer 2 14 are installed on the main oil outlet pipeline of multi-way valve 6. The main oil outlet is divided into three branches. The first branch is connected to the oil collection pipeline 4 through the first station purge pipeline 2. The second branch is connected to the emergency tank pipeline 3 through the second station purge pipeline 2. The third branch is connected to the check valve 10 through the third station purge pipeline 2. The electric drive mechanism 16 is electrically connected to the RTU control box 11. The single measuring instrument 7, thermometer 8, and pressure gauge 9 are all electrically connected to the RTU control box 11. The RTU control box 11 is connected to the terminal platform in real time.

[0032] Set the relevant process parameters: 1) Equipment design parameters: Design pressure: ≤2.5MPa; Design temperature: -20~55℃; Well group specifications: 10 wells; Design scale: 180m 3 / d; Overall dimensions: 3.6 × 6.9 × 1.78 m; Overall weight: 3900kg.

[0033] 2) Equipment response status: ① The system is set to measure the amount of oil flowing into a single well group every 4 hours, with an average data recording time of 4 hours and a 100% compliance rate; ② The average response time for remote valve closure is less than 2 seconds.

[0034] Example 4 Based on the aforementioned structure of the device of the present invention, an integrated skid-mounted equipment for automatic switching and automatic metering of oil inflow process in the well group within the station, as described in Example 4, is constructed: it includes a base skid 13 that can be hoisted and moved for transportation, and components such as a multi-way valve 6, a single meter 7, and an RTU control box 11 are fixedly installed on the upper surface of the base skid 13. The multi-way valve 6 has multiple input ports on its upper part, and each input port is connected to the oil supply pipeline 1 of a well group. The lower part of the multi-way valve 6 is provided with a main oil outlet and a single-volume outlet. The main oil outlet is connected to the oil collection pipeline 4, and the single-volume outlet is connected to the single-volume meter 7. The inner cavity of the multi-way valve 6 is provided with an upper valve body 17 and a rotary valve core 18. A servo motor 19 is fixedly installed on the upper part of the housing of the multi-way valve 6. The servo motor 19 is equipped with an electric drive mechanism 16. Before connecting to the multi-way valve 6, the oil inlet pipeline 1 of each well group is connected to the external purging pipeline 12; the single-volume outlet of the multi-way valve 6 is connected to the inlet end of the single-volume instrument 7 through the single-volume pipeline 5. The single-volume pipeline 5 is equipped with a pressure gauge 9 and a thermometer 8 respectively, and the outlet end of the single-volume instrument 7 is then connected to the oil gathering pipeline 4. Pressure gauge 2 15 and thermometer 2 14 are installed on the main oil outlet pipeline of multi-way valve 6. The main oil outlet is divided into three branches. The first branch is connected to the oil collection pipeline 4 through the first station purge pipeline 2. The second branch is connected to the emergency tank pipeline 3 through the second station purge pipeline 2. The third branch is connected to the check valve 10 through the third station purge pipeline 2. The electric drive mechanism 16 is electrically connected to the RTU control box 11. The single measuring instrument 7, thermometer 8, and pressure gauge 9 are all electrically connected to the RTU control box 11. The RTU control box 11 is connected to the terminal platform in real time.

[0035] Set the relevant process parameters: 1) Equipment design parameters: Design pressure: ≤2.5MPa; Design temperature: -20~55℃; Well configuration: 8 wells; Design scale: 180m 3 / d; Overall dimensions: 3.6 × 6.9 × 1.78 m; Overall weight: 3900kg.

[0036] 2) Equipment maintenance status: The equipment has been running continuously for more than 6 months with a failure rate of 0.

[0037] Example 5 The equipment used in Example 2 performs single-unit measurement. It includes a base skid 13 that can be hoisted and moved for transport. A multi-way valve 6, a single-unit measuring instrument 7, an RTU control box 11, and other components are fixedly mounted on the upper surface of the base skid 13. The multi-way valve 6 has multiple input ports on its upper part, and each input port is connected to the oil supply pipeline 1 of a well group. The lower part of the multi-way valve 6 is provided with a main oil outlet and a single-volume outlet. The main oil outlet is connected to the oil collection pipeline 4, and the single-volume outlet is connected to the single-volume meter 7. The inner cavity of the multi-way valve 6 is provided with an upper valve body 17 and a rotary valve core 18. A servo motor 19 is fixedly installed on the upper part of the housing of the multi-way valve 6. The servo motor 19 is equipped with an electric drive mechanism 16. Before connecting to the multi-way valve 6, the oil inlet pipeline 1 of each well group is connected to the external purging pipeline 12; the single-volume outlet of the multi-way valve 6 is connected to the inlet end of the single-volume instrument 7 through the single-volume pipeline 5. The single-volume pipeline 5 is equipped with a pressure gauge 9 and a thermometer 8 respectively, and the outlet end of the single-volume instrument 7 is then connected to the oil gathering pipeline 4. Pressure gauge 2 15 and thermometer 2 14 are installed on the main oil outlet pipeline of multi-way valve 6. The main oil outlet is divided into three branches. The first branch is connected to the oil collection pipeline 4 through the first station purge pipeline 2. The second branch is connected to the emergency tank pipeline 3 through the second station purge pipeline 2. The third branch is connected to the check valve 10 through the third station purge pipeline 2. The electric drive mechanism 16 is electrically connected to the RTU control box 11. The single measuring instrument 7, thermometer 8, and pressure gauge 9 are all electrically connected to the RTU control box 11. The RTU control box 11 is connected to the terminal platform in real time.

[0038] The implementation process is as follows: First, the oil from each well group enters the different input ports of the multi-way valve 6 through its respective oil supply pipeline 1. After the terminal platform issues a selection command for the oil from well group #1, the RTU control box 11 issues an action command for well group #1 to the electric drive mechanism 16. The electric drive mechanism 16 controls the servo motor 19 to rotate at the corresponding angle, driving the rotary valve core 18 to rotate until the upper port of the single-volume channel of the rotary valve core 18 is aligned and connected with the flow hole 22 of the upper valve body 17 corresponding to the selected oil from well group #1. The selected oil from well group #1 flows through the oil supply pipeline 1 into the single-volume channel in the rotary valve core 18, and then enters the single-volume meter 7 through the single-volume outlet at the bottom of the multi-way valve 6 along the single-volume pipeline 5. After the single-volume meter 7 completes the single-volume measurement, it enters the oil collection pipeline 4. Meanwhile, the oil from the other well groups flows through the flow holes 22 of their respective upper valve bodies 17 and enters the oil collection pipeline 4 through the main oil outlet of the multi-way valve 6. Then, the single-volume data of well group #1 measured by instrument 7 is uploaded to the RTU control box 11, and then transmitted to the terminal platform by the RTU control box 11. The production analysis software calculates the cumulative difference by calculating the time of relative displacement between the rotary valve core 18 and the upper valve body 17. The terminal platform completes the statistical calculation of the single-volume data and generates reports.

[0039] Example 6 The equipment used in Example 2 performs the aforementioned method two off-site purging. It includes a hoistable and mobile base skid 13, with components such as a multi-way valve 6, a single-gauge instrument 7, and an RTU control box 11 fixedly mounted on its upper surface. The multi-way valve 6 has multiple input ports on its upper part, and each input port is connected to the oil supply pipeline 1 of a well group. The lower part of the multi-way valve 6 is provided with a main oil outlet and a single-volume outlet. The main oil outlet is connected to the oil collection pipeline 4, and the single-volume outlet is connected to the single-volume meter 7. The inner cavity of the multi-way valve 6 is provided with an upper valve body 17 and a rotary valve core 18. A servo motor 19 is fixedly installed on the upper part of the housing of the multi-way valve 6. The servo motor 19 is equipped with an electric drive mechanism 16. Before connecting to the multi-way valve 6, the oil inlet pipeline 1 of each well group is connected to the external purging pipeline 12; the single-volume outlet of the multi-way valve 6 is connected to the inlet end of the single-volume instrument 7 through the single-volume pipeline 5. The single-volume pipeline 5 is equipped with a pressure gauge 9 and a thermometer 8 respectively, and the outlet end of the single-volume instrument 7 is then connected to the oil gathering pipeline 4. Pressure gauge 2 15 and thermometer 2 14 are installed on the main oil outlet pipeline of multi-way valve 6. The main oil outlet is divided into three branches. The first branch is connected to the oil collection pipeline 4 through the first station purge pipeline 2. The second branch is connected to the emergency tank pipeline 3 through the second station purge pipeline 2. The third branch is connected to the check valve 10 through the third station purge pipeline 2. The electric drive mechanism 16 is electrically connected to the RTU control box 11. The single measuring instrument 7, thermometer 8, and pressure gauge 9 are all electrically connected to the RTU control box 11. The RTU control box 11 is connected to the terminal platform in real time.

[0040] The implementation process is as follows: First, the RTU control box 11 sends a control signal to the electric drive mechanism 16. The electric drive mechanism 16 drives the rotary valve core 18 to rotate through the servo motor 19. The single-channel of the rotary valve core 18 is not connected to any of the flow holes 22 of the upper valve body 17, which is equivalent to closing all the inlets of the multi-way valve 6. Then, the purging fluid for each well group is purged through its inlet port, and then directly enters the purging tanker truck through the external purging pipeline 12 via each oil pipeline 1.

[0041] Example 7 The equipment described in Example 2 is used for the in-station purging in Method 3. It includes a hoistable and mobile base skid 13, with components such as a multi-way valve 6, a single-gauge instrument 7, and an RTU control box 11 fixedly mounted on its upper surface. The multi-way valve 6 has multiple input ports on its upper part, and each input port is connected to the oil supply pipeline 1 of a well group. The lower part of the multi-way valve 6 is provided with a main oil outlet and a single-volume outlet. The main oil outlet is connected to the oil collection pipeline 4, and the single-volume outlet is connected to the single-volume meter 7. The inner cavity of the multi-way valve 6 is provided with an upper valve body 17 and a rotary valve core 18. A servo motor 19 is fixedly installed on the upper part of the housing of the multi-way valve 6. The servo motor 19 is equipped with an electric drive mechanism 16. Before connecting to the multi-way valve 6, the oil inlet pipeline 1 of each well group is connected to the external purging pipeline 12; the single-volume outlet of the multi-way valve 6 is connected to the inlet end of the single-volume instrument 7 through the single-volume pipeline 5. The single-volume pipeline 5 is equipped with a pressure gauge 9 and a thermometer 8 respectively, and the outlet end of the single-volume instrument 7 is then connected to the oil gathering pipeline 4. Pressure gauge 2 15 and thermometer 2 14 are installed on the main oil outlet pipeline of multi-way valve 6. The main oil outlet is divided into three branches. The first branch is connected to the oil collection pipeline 4 through the first station purge pipeline 2. The second branch is connected to the emergency tank pipeline 3 through the second station purge pipeline 2. The third branch is connected to the check valve 10 through the third station purge pipeline 2. The electric drive mechanism 16 is electrically connected to the RTU control box 11. The single measuring instrument 7, thermometer 8, and pressure gauge 9 are all electrically connected to the RTU control box 11. The RTU control box 11 is connected to the terminal platform in real time.

[0042] The implementation process is as follows: First, the RTU control box 11 sends a control signal to the electric drive mechanism 16. The electric drive mechanism 16 drives the rotary valve core 18 to rotate through the servo motor 19. The single-channel of the rotary valve core 18 is not connected to any of the flow holes 22 of the upper valve body 17, which is equivalent to closing all the inlets of the multi-way valve 6. Then, the pipelines of the accident tank line 3 and the single meter 7 are closed. The station purging fluid enters from the single flow valve 10, enters the oil collection line 4 through the station purging pipeline 2, and completes the purging of the station pipelines.

[0043] Example 8 Emergency response.

[0044] The equipment according to Embodiment 2 includes a base skid 13 that can be hoisted and moved for transport. Components such as a multi-way valve 6, a single-gauge instrument 7, and an RTU control box 11 are fixedly installed on the upper surface of the base skid 13. The multi-way valve 6 has multiple input ports on its upper part, and each input port is connected to the oil supply pipeline 1 of a well group. The lower part of the multi-way valve 6 is provided with a main oil outlet and a single-volume outlet. The main oil outlet is connected to the oil collection pipeline 4, and the single-volume outlet is connected to the single-volume meter 7. The inner cavity of the multi-way valve 6 is provided with an upper valve body 17 and a rotary valve core 18. A servo motor 19 is fixedly installed on the upper part of the housing of the multi-way valve 6. The servo motor 19 is equipped with an electric drive mechanism 16. Before connecting to the multi-way valve 6, the oil inlet pipeline 1 of each well group is connected to the external purging pipeline 12; the single-volume outlet of the multi-way valve 6 is connected to the inlet end of the single-volume instrument 7 through the single-volume pipeline 5. The single-volume pipeline 5 is equipped with a pressure gauge 9 and a thermometer 8 respectively, and the outlet end of the single-volume instrument 7 is then connected to the oil gathering pipeline 4. Pressure gauge 2 15 and thermometer 2 14 are installed on the main oil outlet pipeline of multi-way valve 6. The main oil outlet is divided into three branches. The first branch is connected to the oil collection pipeline 4 through the first station purge pipeline 2. The second branch is connected to the emergency tank pipeline 3 through the second station purge pipeline 2. The third branch is connected to the check valve 10 through the third station purge pipeline 2. The electric drive mechanism 16 is electrically connected to the RTU control box 11. The single measuring instrument 7, thermometer 8, and pressure gauge 9 are all electrically connected to the RTU control box 11. The RTU control box 11 is connected to the terminal platform in real time.

[0045] The implementation process is as follows: First, the operator drives the rotary valve core 18 to rotate by cranking the handle, so that the single-flow channel of the rotary valve core 18 is not connected to any of the flow holes 22 of the upper valve body 17, which is equivalent to closing all the inlets of the multi-way valve 6. Then, shut off the pipelines of the emergency tank line 3, the oil collection line 4, and the single meter 7 to complete the troubleshooting of the relevant components.

Claims

1. An unmanned station with an automated single-quantity digital integrated skid, characterized in that: Includes a base skid (13), on the upper surface of which a multi-way valve (6), a single-volume meter (7), and an RTU control box (11) are fixedly installed. The upper part of the multi-way valve (6) is provided with multiple input ports, each of which is connected to the oil supply pipeline (1) of a well group. The lower part of the multi-way valve (6) is provided with a main oil outlet and a single-volume outlet. The main oil outlet is connected to the oil collection pipeline (4), and the single-volume outlet is connected to the single-volume meter (7). The inner cavity of the multi-way valve (6) is provided with an upper valve body (17) and a rotary valve core (18). A servo motor (19) is fixedly installed on the upper part of the housing of the multi-way valve (6), and the servo motor (19) is equipped with an electric drive mechanism (16). The electric drive mechanism (16) is electrically connected to the RTU control box (11), the single meter (7) is electrically connected to the RTU control box (11), and the RTU control box (11) is connected to the terminal platform in real time.

2. The unmanned station automatic single-quantity digital integrated skid according to claim 1, characterized in that: The upper valve body (17) has a ring of flow holes (22) spaced around its circumference, and each flow hole (22) is connected to an input port. At the same time, a central hole (21) is opened at the center of the upper valve body (17), and the drive shaft (20) of the rotating valve core (18) passes through the central hole (21) and is connected to the output shaft of the servo motor (19).

3. The unmanned station automatic single-quantity digital integrated skid according to claim 1, characterized in that: The rotary valve core (18) has a single-flow channel inside its body. The upper edge of the upper port of the single-flow channel can only be connected to one flow hole (22) of the upper valve body (17) at the same time. A baffle (23) is provided on the inner edge of the upper port of the single-flow channel. The lower port of the single-flow channel is sealed and connected to the single-flow outlet, so that the rotary valve core (18) can only connect to the oil pipeline (1) of one well group at a time. There is a gap between the rotary valve core (18) and the inner wall of the multi-way valve (6).

4. The unmanned station automatic single-quantity digital integrated skid according to claim 1, characterized in that: Before connecting to the multi-way valve (6), the oil inlet pipeline (1) of each well group is connected to the external purging pipeline (12); the single outlet of the multi-way valve (6) is connected to the inlet of the single meter (7) through the single meter pipeline (5), and the single meter pipeline (5) is equipped with a pressure gauge (9) and a thermometer (8) respectively. The outlet of the single meter (7) is then connected to the oil gathering pipeline (4).

5. The unmanned station automatic single-quantity digital integrated skid according to claim 1, characterized in that: Pressure gauge 2 (15) and thermometer 2 (14) are installed on the pipeline of the main oil outlet of the multi-way valve (6). The main oil outlet is divided into three branches. The first branch is connected to the oil collection pipeline (4) through the first station purge pipeline 2. The second branch is connected to the emergency tank pipeline (3) through the second station purge pipeline (2). The third branch is connected to the single-flow valve (10) through the third station purge pipeline (2).

6. The unmanned station automatic single-quantity digital integrated skid according to claim 1, characterized in that: The output end of the servo motor 19 is connected to a crank (24).

7. An automatic single-quantity control method for an unmanned station integrated skid, relying on the automatic single-quantity digital integrated skid for unmanned stations as described in any one of claims 1-6, characterized in that, Follow these steps: First, the oil from the designated well group is introduced into the single-volume meter (7), and then the single volume is completed; Meanwhile, the oil from the other well groups flows through the flow holes (22) of their respective upper valve bodies (17) and enters the oil collection pipeline (4) through the main oil outlet of the multi-way valve (6). Then, the single quantity instrument (7) uploads the measured single quantity data to the RTU control box (11), which then transmits it to the terminal platform. The production analysis software calculates the cumulative difference by calculating the time of relative displacement between the rotary valve core (18) and the upper valve body (17). The terminal platform completes the statistical calculation of the single quantity data and generates reports.

8. The unmanned station integrated skid automatic single-quantity control method according to claim 7, characterized in that, The specific process for performing a single-volume operation on a designated well group is as follows: Oil from each well group enters through its respective oil supply pipeline (1) and is input to different input ports of the multi-way valve (6). After the terminal platform issues a selection command for the oil from the well group, the RTU control box (11) issues an action command for the specific well group number to the electric drive mechanism (16). The electric drive mechanism (16) controls the servo motor (19) to rotate at the corresponding angle, driving the rotary valve core (18) to rotate until the upper port of the single-volume channel of the rotary valve core (18) is aligned and connected with the flow hole (22) of the upper valve body (17) corresponding to the selected oil from the well group. The oil from the selected well group flows through the oil supply pipeline (1) into the single-volume channel in the rotary valve core (18), and then enters the single-volume meter (7) along the single-volume pipeline (5) through the single-volume outlet at the bottom of the multi-way valve (6). After the single-volume meter (7) completes the single-volume measurement, it enters the oil collection pipeline (4).

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