Oil well yield metering device
By designing an oil well output metering device including a weighing cylinder and a weighing assembly, the continuous metering of the oil and the oil switching between the chambers are achieved by using the coordination of the limit switch and the valve assembly, the problems of low metering accuracy and difficulty in achieving continuous metering in the prior art are solved, and the metering accuracy and reliability of the device are improved.
Patent Information
- Application Number
- CN202422201578.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-09-09
AI Technical Summary
The existing oil well output metering device has low metering accuracy, making it difficult to achieve continuous metering, and it is easy to affect the subsequent metering accuracy due to gas interference in the oil and fouling of the inner wall of the device.
An oil well output metering device is designed, using a weighing cylinder and a weighing assembly, which is divided into two independent chambers on the left and right through the moving valve block, and the coordination of the limit switch and valve components is used to realize the continuous metering of the oil and the oil switching between the chambers, and the pressure of the well fluid itself is used to clean up the residual oil and avoid scaling.
The accuracy of oil well production metering is improved, continuous metering is achieved, and the internal wall of the device is scaled by cleaning residual oil, which improves the reliability of the device.
Smart Images
Figure CN222924440U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of oil well production metering, in particular to an oil well production metering device. Background Art
[0002] Generally, the output of an oil well is a three-phase medium, mixed with crude oil, water and associated gas. Since the liquid volume and gas volume are unstable, and the conditions of each oil well are different, the liquid carried in the gas, the gas carried in the liquid, and the proportion change of the three phases of oil, gas and water fluctuate greatly. The gas and liquid cannot be completely separated and there is no obvious gas-liquid interface, resulting in the inability to accurately measure the oil output of the oil well using a flow meter. And the existing other weighing metering devices are complex in structure and poor in reliability because auxiliary equipment such as a booster pump needs to be added, making it difficult to perform continuous metering operations. Moreover, it is difficult to clean after metering, resulting in wax and scale formation on the inner wall of the metering device, affecting the subsequent metering accuracy. Summary of the Utility Model
[0003] Aiming at the deficiencies of the prior art, the utility model provides an oil well production metering device, which fundamentally solves the problem of low metering accuracy and realizes continuous metering.
[0004] The technical solution of the utility model is as follows: an oil well production metering device, including a weighing cylinder and a weighing assembly for weighing the weighing cylinder. The inside of the weighing cylinder is divided into two independent first chambers and second chambers on the left and right by a reciprocating floating valve block, and a limit switch for detecting the movement position of the floating valve block is arranged in the weighing cylinder. Both ends of the weighing cylinder are respectively provided with valve assemblies communicated with the first chamber and the second chamber through weighing connecting pipes. Each valve assembly has a liquid inlet end for delivering oil to the corresponding chamber and a liquid outlet end for outputting oil from the corresponding chamber.
[0005] The weighing assembly includes a support plate, a weighing sensor and a lifting mechanism. The support plate is fixedly connected to the outer wall of the weighing cylinder. One end of the weighing sensor is located at the bottom of the support plate, and the other end of the weighing sensor is fixedly connected to the output end of the lifting mechanism.
[0006] By switching the on-off states of the valve assemblies on both sides of the weighing cylinder, the oil fluid of the oil well is input into the corresponding weighing cylinder chamber in this state, and the indication of the limit switch is used as the signal for the chamber to be full of oil. At the same time, the lifting mechanism previously jacks up the weighing cylinder through the cooperation of the weighing sensor and the support plate, and uses the data of the weighing sensor as the measurement basis for the oil well output, eliminating the interference of gas in the oil fluid and effectively improving the measurement accuracy. At the same time, with the mutual cooperation of the two valve assemblies, the first chamber and the second chamber are switched between the full-oil states to achieve continuous metering operations. When the first chamber and the second chamber are switched between full-oil states, the residual oil fluid in the other chamber will be discharged by the pressure of the well fluid itself, thus achieving a cleaning effect, avoiding the scaling of the residual oil fluid in the weighing cylinder, ensuring the subsequent measurement accuracy and improving the reliability.
[0007] The number of the limit switches is two, which are respectively located at the two ends of the weighing cylinder at the positions corresponding to the first chamber and the second chamber.
[0008] The liquid inlet ends of the valve assemblies are arranged in parallel on the liquid inlet pipe, and the liquid outlet ends of the valve assemblies are arranged in parallel on the liquid outlet pipe. An accumulator for storing the oil fluid between the liquid inlet pipe and the weighing cylinder is installed on the liquid inlet pipe. When used for a pure liquid well condition, since the liquid is incompressible, when the oil fluid is pressurized and transported, the accumulator can store the excess wellhead oil fluid within the stable time required for each weighing, thereby balancing the pipeline pressure and protecting the device.
[0009] There are two weighing cylinders, and valve assemblies are arranged at both ends of each weighing cylinder. The liquid inlet ends of the valve assemblies of each weighing cylinder are arranged in parallel together on the liquid inlet pipe, and the liquid outlet ends of the valve assemblies of each weighing cylinder are arranged in parallel together on the liquid outlet pipe. The two weighing cylinders arranged in parallel can extend the cumulative time for stable weighing during the switching measurement, thereby improving the measurement accuracy.
[0010] The valve assembly is a three-way valve, and one of the interfaces of the three-way valve is connected to the weighing connection pipe, and the other two interfaces of the three-way valve respectively form the liquid inlet end and the liquid outlet end.
[0011] The valve assembly includes a liquid inlet valve and a liquid outlet valve. The outlet of the liquid inlet valve and the inlet of the liquid outlet valve are connected to the first chamber or the second chamber through a three-way joint. The inlet of the liquid inlet valve forms the liquid inlet end, and the outlet of the liquid outlet valve forms the liquid outlet end.
[0012] It includes a joint assembly, and the joint assembly includes a weighing connection joint, a liquid inlet joint and a liquid outlet joint. The weighing connection joint is installed on the weighing connection pipe to enable the weighing connection pipe to have at least three degrees of freedom; the liquid inlet joint and the liquid outlet joint are respectively installed at one end of the liquid inlet pipe and the liquid outlet pipe far away from the weighing cylinder. Among them, the liquid inlet joint and the liquid outlet joint are self-closing quick connectors.
[0013] An air inflation assembly is provided at both ends of the weighing cylinder. The air inflation assembly includes an air inflation pipe and an air inflation valve installed on the air inflation pipe. Both ends of each air inflation pipe are connected to an air source and a first chamber and a second chamber at corresponding positions. The setting of the air inflation assembly can perform an evacuation operation on the weighing cylinder, so as to record the net weight of the weighing cylinder in the empty cylinder state and ensure the accuracy of measurement.
[0014] The beneficial effects of the present utility model are as follows: By switching the on-off states of the valve assemblies on both sides of the weighing cylinder, the oil fluid of the oil well is input into the corresponding weighing cylinder chamber in this state, and the indication of the limit switch is used as the signal for the chamber to be full of oil. At the same time, the lifting mechanism previously jacks up the weighing cylinder through the cooperation of the weighing sensor and the support plate, and the data of the weighing sensor is used as the measurement basis for the oil well output, eliminating the interference of gas in the oil fluid and effectively improving the measurement accuracy; at the same time, with the mutual cooperation of the two valve assemblies, the first chamber and the second chamber are switched between the full oil states to realize continuous measurement operations. When the first chamber and the second chamber are switched between full oil states, the residual oil fluid in the other chamber will be discharged by the pressure of the well fluid itself, thus achieving a cleaning effect, avoiding the scaling of the residual oil fluid in the weighing cylinder, ensuring the subsequent measurement accuracy, and improving the reliability. Description of the Drawings
[0015] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of this specification. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:
[0016] Figure 1 is a schematic structural diagram of Embodiment 1 of the present utility model;
[0017] Figure 2 is a schematic structural diagram of Embodiment 2 of the present utility model;
[0018] Figure 3 is a schematic structural diagram of Embodiment 3 of the present utility model;
[0019] Figure 4 is a schematic structural diagram of Embodiment 4 of the present utility model;
[0020] Figure 5 is a side view of a single weighing cylinder of the present utility model;
[0021] Figure 6 is along Figure 5 a cross-sectional view taken along the A-A direction in
[0022] Reference numerals: 1, weighing cylinder; 101, support; 2, weighing assembly; 201, lifting mechanism; 202, weighing sensor; 203, support plate; 3, floating valve block; 4, inlet valve; 5, outlet valve; 6, inlet pipe; 601, inlet joint; 7, outlet pipe; 701, outlet joint; 8, weighing connection pipe; 801, weighing connection joint; 9, charging pipe; 901, charging valve; 10, accumulator; 1001, accumulator gas pipe; 11, three-way valve; 12, limit switch; 13, safety valve. Detailed implementation mode
[0023] To enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings. Other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.
[0024] As Figure 1 and Figure 5 shown, the present invention provides an oil well production metering device, including a weighing cylinder 1 and a weighing assembly 2 for weighing the weighing cylinder 1. The weighing assembly 2 includes a support plate 203, a weighing sensor 202 and a lifting mechanism 201. The support plate 203 is fixedly connected to the outer wall of the weighing cylinder 1. One end of the weighing sensor 202 is located at the bottom of the support plate 203, and the other end of the weighing sensor 202 is fixedly connected to the output end of the lifting mechanism 201. In one embodiment, the lifting mechanism 201 can be a jack, which is controlled electrically or pneumatically. The jack drives the support plate 203 to lift the weighing cylinder 1. At this time, the data displayed by the weighing sensor 202 is the weight of the weighing cylinder 1 in real time. After the metering is completed, the jack is depressurized, and the weighing cylinder 1 falls smoothly to the ground through the bottom support 101 to prevent the weighing sensor 202 from continuously supporting the weighing cylinder 1 and damaging the weighing sensor 202. The number of the above-mentioned weighing assemblies 2 can be set to one group, two groups or more than four groups according to the volume of the weighing cylinder 1. One group of weighing assemblies 2 is arranged at the bottom of the weighing cylinder 1. At this time, the support 101 of the weighing cylinder 1 is located on both sides of the weighing assembly 2; two groups of weighing assemblies 2 are symmetrically distributed on both sides of the weighing cylinder 1; four groups of weighing assemblies 2 are arranged in two groups symmetrically on both sides of the weighing cylinder 1.
[0025] As Figure 6As shown, the inside of the weighing cylinder 1 is divided into two independent first and second chambers by a reciprocating floating valve block 3. The volumes of the first and second chambers alternately increase and decrease as the floating valve block 3 moves. And there is a limit switch 12 on the weighing cylinder 1 for detecting the movement position of the floating valve block 3. Among them, the number of the limit switches 12 is two, which are respectively located at the two ends of the weighing cylinder 1 at positions corresponding to the first chamber and the second chamber. In one embodiment, the limit switch 12 is a mechanical contact limiter. The two limit switches 12 are respectively embedded in the opposite chamber walls of the first chamber and the second chamber. The contacts of the two limit switches 12 are arranged towards the side of the floating valve block 3. The side of the floating valve block 3 is in pressing contact with the contacts of the limit switch 12 to generate a signal indicating the full-oil state of the chamber. In another embodiment, the limit switch 12 is a Hall induction switch. The limit switch 12 is installed on the outer walls at both ends of the aluminum (or non-magnetic materials such as stainless steel) weighing cylinder 1. A magnetic ring is fixed on the outer wall of the floating valve block 3. As the floating valve block 3 moves to the end position of the chamber, the corresponding Hall induction switch senses the magnetic field of the magnetic ring and emits a signal as a signal indicating the full-oil state of the chamber.
[0026] Valve assemblies are respectively arranged at both ends of the weighing cylinder 1 and are connected to the first chamber and the second chamber through weighing connecting pipes 8. Each valve assembly has a liquid inlet end for delivering oil to the corresponding chamber and a liquid outlet end for discharging oil from the corresponding chamber. By switching the on-off states of the valve assemblies on both sides of the weighing cylinder 1, the oil of the oil well is input into the corresponding chamber of the weighing cylinder 1 in this state until the floating valve block 3 moves into contact with the contacts of the limit switch 12 to generate a signal to sense the full-oil state of the chamber. The weighing sensor 202 records the weight data of the weighing cylinder 1 at this time as the measurement basis for the oil well output. By the weighing measurement method, the interference of gas in the oil on the measurement does not need to be considered, thereby improving the measurement accuracy.
[0027] At the same time, with the mutual cooperation of the two valve assemblies, the first chamber and the second chamber switch between the full-oil states to realize continuous metering operation. And when the first chamber and the second chamber switch between the full-oil states, the residual oil in the other chamber will be discharged by the pressure of the well fluid itself, which has a cleaning effect. In order to further improve the above cleaning effect, the connection position of the weighing connecting pipe 8 with the first chamber or the second chamber is arranged close to the bottom of the weighing cylinder 1, so as to effectively avoid the scaling of the residual oil in the weighing cylinder 1, ensure the subsequent metering accuracy, and improve the reliability. Specifically, the liquid inlet ends of the valve assemblies are arranged in parallel on the inlet pipe 6, and the liquid outlet ends of the valve assemblies are arranged in parallel on the outlet pipe 7. In Embodiment 1, such as Figure 1As shown, the valve assembly includes an inlet valve 4 and an outlet valve 5. The outlet of the inlet valve 4 and the inlet of the outlet valve 5 are connected to the first chamber or the second chamber through a tee joint. The inlet of the inlet valve 4 forms the inlet end, and the outlet of the outlet valve 5 forms the outlet end.
[0028] To more accurately record the net weight of the weighing cylinder 1 in the no-load state, inflation assemblies are respectively provided at both ends of the weighing cylinder 1. The inflation assemblies include inflation pipes 9 and inflation valves 901 installed on the inflation pipes 9. Both ends of each inflation pipe 9 are respectively connected to a gas source and the first chamber or the second chamber at the corresponding position. Preferably, the gas filled into the weighing cylinder 1 by the inflation assemblies is an inert gas to ensure safety during the metering process. Specifically, nitrogen can be selected as the inert gas.
[0029] To improve the automation degree of the device, further preferably, the device further includes a controller. The controller is electrically connected to each valve, the weighing sensor 202, and the limit switch 12 through control lines and signal lines to accurately control the measurement process and obtain the metering result through an algorithm.
[0030] The above solution constitutes the single-cylinder metering device of Embodiment 1, which is applied to a gas-containing oil well. When measuring the oil well output, operate the jack to lift the weighing cylinder 1, close the outlet valve 5 on the left side and the inlet valve 4 on the right side of the weighing cylinder 1, open the inlet valve 4 on the left side and the outlet valve 5 on the right side of the weighing cylinder 1. The well fluid enters the weighing cylinder 1 through the left inlet valve 4 and pushes the floating valve block 3 to move to the right. At this time, the well fluid (or residual fluid) at the right end flows out through the right outlet valve 5. When the floating valve block 3 is pushed to the right end and contacts the limit switch 12, stabilize for about 2 - 3 seconds and weigh the weighing cylinder 1, denoted as G 1 ; after weighing, close the inlet valve 4 on the left side and the outlet valve 5 on the right side of the weighing cylinder 1. At the same time, open the outlet valve 5 on the left side and the inlet valve 4 on the right side of the weighing cylinder 1. At this time, the well fluid enters the weighing cylinder 1 from the right inlet valve 4 and pushes the floating valve block 3 to move to the left. At this time, the well fluid (or residual fluid) at the left end flows out through the left outlet valve 5. Wait until it moves to the left end, contacts the limit switch 12 and stabilizes for 2 - 3 seconds, and continue to weigh the weighing cylinder 1, G 2 , and so on in a cycle, and the liquid production of the oil well can be measured within the preset sampling time; after N weighings, if the floating valve block 3 stops at the left end, close the inlet valve 4, the outlet valve 5 on the left side and the inlet valve 4 on the right side, open the outlet valve 5 on the right side, and at the same time open the inflation valve 901 on the left side of the weighing cylinder 1. At this time, the floating valve block 3 moves to the right under the action of air pressure and discharges the well fluid in the weighing cylinder 1 through the liquid outlet pipe 7. When the floating valve block 3 is pushed to the right end and triggers the limit switch 12, close the inflation valve 901, and then start to weigh the empty weight of the weighing cylinder 1, G 空 , then the calculation formula for the weight measured each time is G = G N - G 空, add the weight difference G measured each time to obtain the liquid production volume G of the oil well within the preset sampling time 总 ; according to the liquid production volume G measured this time 总 and the density ρ of the oil liquid 液 calculate the liquid volume V 液 , and then calculate the total volume V according to the empty cylinder volume V of the single weighing cylinder 总 = N * V, then the gas volume is V 总 - V 液 , then the gas-liquid ratio of the oil liquid is (V 总 - V 液 ) / V 液 .
[0031] As Figure 2 described, different from Embodiment 1, in Embodiment 2, the valve assembly is a three-way valve 11. One interface of the three-way valve 11 is connected to the weighing connection pipe 8, and the other two interfaces of the three-way valve 11 respectively form the liquid inlet end and the liquid outlet end. By switching the connection relationship between two interfaces in the three-way valve 11, the input and output operations of the oil liquid to the first chamber and the second chamber of the weighing cylinder 1 are carried out.
[0032] The device further includes a joint assembly, and the joint assembly includes a weighing connection joint 801, a liquid inlet joint 601 and a liquid outlet joint 701. The weighing connection joint 801 is installed on the weighing connection pipe 8 to enable the weighing connection pipe 8 to have at least three degrees of freedom; the liquid inlet joint 601 and the liquid outlet joint 701 are respectively installed at one end of the liquid inlet pipe 6 and the liquid outlet pipe 7 away from the weighing cylinder 1. In one embodiment, the weighing connection joint 801 can be selected as three rotary joints connected in series to provide three degrees of freedom for the weighing connection pipe 8, so as to ensure that the weighing connection pipe 8 can still obtain true, effective, accurate and stable weighing measurement data under the interference of the pulsating impact force, pressure and tension of the oil liquid, etc. At the same time, compared with the traditional hose connection method, it avoids the measurement error caused by the change of the hose tension due to the change of the infusion pressure, thereby further improving the stability and measurement accuracy; the liquid inlet joint 601 and the liquid outlet joint 701 can be selected as self-closing quick joints to improve the installation and disassembly efficiency of the joints and avoid the oil liquid from leaking and polluting the environment.
[0033] In order to ensure the safety during the oil liquid transportation process, a safety valve 13 is further arranged between the liquid inlet pipe 6 and the liquid outlet pipe 7.
[0034] As Figure 3As shown in the figure, in Embodiment 3, the liquid inlet ends of the valve assemblies are connected in parallel to the liquid inlet pipe 6, and the liquid outlet ends of the valve assemblies are connected in parallel to the liquid outlet pipe 7. On the basis of Embodiment 1, an accumulator 10 for storing the oil liquid between the liquid inlet pipe 6 and the weighing cylinder 1 is installed on the liquid inlet pipe 6; specifically, a liquid storage cavity and an airbag are arranged inside the accumulator 10. The liquid storage cavity is communicated with the liquid inlet pipe 6 for storing oil liquid. The airbag is connected to the gas source through an accumulator air pipe 1001 so that gas is filled into the airbag and elastic potential energy is accumulated; this embodiment is for use in a pure liquid well condition. Since the liquid is incompressible, when the oil liquid is pressurized and transported, the accumulator 10 can store the excess wellhead oil liquid within the stable time (2-3S) required for each weighing. After the stable time, the airbag rebounds, and the liquid in the accumulator 10 and the oil liquid in the liquid inlet pipe 6 are pressed into the other end of the weighing cylinder 1 together, thereby balancing the pipeline pressure and protecting the device.
[0035] As Figure 4 shown, in Embodiment 4, there are two weighing cylinders 1. The two ends of each weighing cylinder 1 are provided with the valve assemblies. The liquid inlet ends of the valve assemblies of each weighing cylinder 1 are connected in parallel to the liquid inlet pipe 6 together, and the liquid outlet ends of the valve assemblies of each weighing cylinder 1 are connected in parallel to the liquid outlet pipe 7 together; the two weighing cylinders 1 are respectively denoted as cylinder A and cylinder B. Operate the jack to lift cylinder A and cylinder B, and close all the liquid inlet valves 4 and liquid outlet valves 5 of cylinder B; close the right liquid outlet valve 5 and the left liquid inlet valve 4 of cylinder A, and open the left liquid inlet valve 4 and the right liquid outlet valve 5 of cylinder A; the oil liquid starts to enter cylinder A from the left liquid inlet valve 4, and the floating valve block 3 in cylinder A moves from left to right. The residual liquid in cylinder A is discharged from the right liquid outlet valve 5. When the floating valve block 3 in cylinder A moves to the right end and triggers the limit switch 12; close the left liquid inlet valve 4 and the right liquid outlet valve 5 of cylinder A and open the left liquid outlet valve 5 and the right liquid inlet valve 4 of cylinder B. At this time, the oil liquid flows into cylinder B from the right liquid inlet valve 4 and pushes the floating valve block 3 in cylinder B to move to the left, and the well fluid (or residual liquid) flows out from the left liquid outlet valve 5; after cylinder A emits a full oil signal from the limit switch 12 and stabilizes for 8-10S, weigh cylinder A to obtain G A1 , after cylinder A is weighed, the floating valve block 3 in cylinder B is pushed to the left end by the well fluid, and the left limit switch 12 is turned on; close the left liquid outlet valve 5 and the right liquid inlet valve 4 of cylinder B and open the left liquid outlet valve 5 and the right liquid inlet valve 4 of cylinder A. At this time, the well fluid flows into cylinder A from the right liquid inlet valve 4, pushing the floating valve block 3 in cylinder A to move to the left, and the well fluid flows out from the left liquid outlet valve 5; after cylinder B emits a full oil signal from the limit switch 12 and stabilizes for 8-10S, weigh cylinder B to obtain G B1, after the weighing of cylinder A in cylinder B, the floating valve block 3 of cylinder A is pushed to the left end by well fluid, the left end limit switch 12 is turned on, the left outlet valve 5 and the right inlet valve 4 of cylinder A are closed, and the left inlet valve 4 and the right outlet valve 5 of cylinder B are opened; after 8 - 10 seconds when the full oil signal is sent from the limit switch 12 of cylinder A, weigh cylinder A, and continuously obtain the weight values of cylinders A and B each time in a cycle; when the weighing of cylinders A and B reaches the preset sampling time after N times, stop weighing; weigh the empty weight of cylinders A and B. At this time, assume that the floating valve block 3 in cylinder A stops at the left end and the floating valve block 3 in cylinder B stops at the right end. Then close the inlet valves 4 on both sides and the left outlet valve 5 of cylinder A, open the right outlet valve 5, and at the same time open the inflation valve 901 on the left side of cylinder A to push the floating valve block 3 from left to right, and push the well fluid in the cylinder out through the outlet valve 5. When the floating valve block 3 is pushed to the right end and triggers the limit switch 12, close the inflation valve 901 and start weighing the empty weight G of cylinder A A空 ; close the right outlet valve 5 of cylinder A, the inlet valves 4 on both sides and the right outlet valve 5 of cylinder B, open the left outlet valve 5 of cylinder B, and at the same time open the inflation valve 901 on the right side of cylinder B to push the floating valve block 3 in cylinder B from right to left, and discharge the well fluid in cylinder B through the left outlet valve 5. When the floating valve block 3 is pushed to the left end and triggers the limit switch 12, close the inflation valve 901; start weighing the empty weight G of cylinder B B空 ; then the calculation formula for the weight measured by cylinder A each time is G A = G AN - G A空 , add the weight difference G A measured each time to obtain G A总 , the calculation formula for the weight measured by cylinder B each time is G B = G BN - G B空 , add the weight difference G B measured each time to obtain G B总 , the liquid production volume of this oil well within the preset sampling time is G A总 + G B总 ; calculate the liquid volume V 液 according to the above liquid production volume and the density ρ 液 of the oil fluid, and then calculate the total volume V A according to the sum of the volumes of cylinder A (V B ) and cylinder B (V 总 ) as V A = N * (V B + V 总 ), then the gas volume is V 液 - V 总 , and the gas - liquid ratio of the oil fluid is (V 液 ) / V 液 .
[0036] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.
[0037] In the description of this specification, the description of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0038] The above is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed by this application can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.
Claims
1. An oil well production metering device, characterized in that: It includes a weighing cylinder and a weighing assembly for weighing the weighing cylinder, the inside of the weighing cylinder is divided into two independent first chambers and second chambers on the left and right by a reciprocating floating valve block, and a limit switch for detecting the moving position of the floating valve block is provided in the weighing cylinder, and valve assemblies connected with the first chamber and the second chamber through a weighing connecting pipe are respectively provided at both ends of the weighing cylinder, and each valve assembly has a liquid inlet end for conveying oil to the corresponding chamber and a liquid outlet end for outputting oil to the corresponding chamber.
2. The oil well production metering device according to claim 1, characterized in that: The weighing assembly includes a support plate, a weighing sensor and a lifting mechanism. The support plate is fixedly connected to the outer wall of the weighing cylinder. One end of the weighing sensor is located at the bottom of the support plate, and the other end of the weighing sensor is fixedly connected to the output end of the lifting mechanism.
3. The oil well production metering device according to claim 1, characterized in that: There are two limit switches, which are respectively located at positions at both ends of the weighing cylinder corresponding to the first chamber and the second chamber.
4. The oil well production metering device according to claim 1, characterized in that: The liquid inlet end is arranged in parallel on the liquid inlet pipe, and the liquid outlet end is arranged in parallel on the liquid outlet pipe. An accumulator for storing oil between the liquid inlet pipe and the weighing cylinder is installed on the liquid inlet pipe.
5. The oil well production metering device according to claim 1, characterized in that: Two weighing cylinders are provided, and the valve components are provided at both ends of each weighing cylinder. The liquid inlet ends are provided in parallel on the liquid inlet pipe, and the liquid outlet ends are provided in parallel on the liquid outlet pipe.
6. An oil well production metering device according to any one of claims 1 to 5, characterized in that: The valve assembly is a three-way valve, one of the interfaces of the three-way valve is connected to the weighing connecting pipe, and the other two interfaces of the three-way valve respectively form the liquid inlet end and the liquid outlet end.
7. An oil well production metering device according to any one of claims 1 to 5, characterized in that: The valve assembly includes an inlet valve and an outlet valve, the outlet of the inlet valve and the inlet of the outlet valve are connected to the first chamber or the second chamber via a three-way joint, the inlet of the inlet valve forms the liquid inlet end, and the outlet of the outlet valve forms the liquid outlet end.
8. An oil well production metering device according to claim 4 or 5, characterized in that: It includes a joint assembly, which includes a weighing connection joint, a liquid inlet joint and a liquid outlet joint. The weighing connection joint is installed on the weighing connection pipe so that the weighing connection pipe has at least three degrees of freedom; the liquid inlet joint and the liquid outlet joint are respectively installed at one end of the liquid inlet pipe and the liquid outlet pipe away from the weighing cylinder, wherein the liquid inlet joint and the liquid outlet joint are self-closing quick joints.
9. An oil well production metering device according to any one of claims 1 to 5, characterized in that: Both ends of the weighing cylinder are provided with inflation components, which include an inflation pipe and an inflation valve installed on the inflation pipe. Both ends of each inflation pipe are connected to an air source and a first chamber or a second chamber at a corresponding position.