CN210178342U - Three-pressure-difference three-phase flowmeter for metering station - Google Patents
Three-pressure-difference three-phase flowmeter for metering station Download PDFInfo
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- CN210178342U CN210178342U CN201920617702.2U CN201920617702U CN210178342U CN 210178342 U CN210178342 U CN 210178342U CN 201920617702 U CN201920617702 U CN 201920617702U CN 210178342 U CN210178342 U CN 210178342U
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Abstract
The utility model relates to a pressure differential metering equipment field, especially a metering station is with three pressure differential three-phase flow meters. The method aims to solve the problem that the fluid condition is difficult to measure in the prior art. The utility model discloses connect single standard metal volume group, the switching-over pipeline group of liquid flow direction in measurement pneumatic cylinder and the control measurement pneumatic cylinder, switching-over pipeline group includes an import, the controller that two pairs of four control lines of an export and symmetry installation were opened and close, every to the controller correspondence open and close in order to form the return circuit of different flow directions, import and single standard metal volume intercommunication, the follow-up pipeline of exit linkage, the measurement pneumatic cylinder is connected with position sensor and timing element, install profit proportion pressure differential measurement pipeline and gas-liquid proportion pressure differential measurement pipeline respectively in the both sides of measurement pneumatic cylinder. Has the advantages that: the method has the advantages of accurate measurement, simple steps, low requirement on the skills of workers and low cost.
Description
Technical Field
The utility model relates to a volumetric metering station field of single well form, especially a metering station is with three pressure differential three-phase flow meters.
Background
The metering station is an important component of the oil field, the working condition of a blank oil well can be known in time through the analysis of the production condition of the oil field by the metering station, and meanwhile, oil deposit engineering data are provided by oil field geological departments. The metering mode of the metering station at present mainly comprises a metering mode of simultaneously connecting a plurality of groups of standard units and a single-well type metering station of singly connecting an independent oil well, and in actual work, the single-well type metering station is mainly different from the multi-well type metering station in flow rate and flow.
In the prior art, the defects mainly lie in that the quality monitoring of oil products is always in a blank position, although independent oil product monitoring steps are provided, the independent oil product monitoring steps are mostly independent steps carried out by independent equipment, the cost is high, and equipment capable of monitoring the oil quality is lacked in related equipment of a metering station.
However, the staff thinks that the prior art still has the defect that the fluid condition measurement in the flowmeter is difficult: 1. the water-oil ratio and the gas-liquid ratio cannot be measured simultaneously, the measurement equipment is large in size, and the measurement difficulty is high; 2. high pertinence and low interchangeability.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problems of difficult measurement of the fluid condition, complex measurement process, complicated measurement equipment and overlarge volume in the prior art.
The utility model has the following concrete scheme:
a three-differential-pressure three-phase flowmeter for a metering station is designed, is connected with a single standard metal measuring unit group, comprises a metering hydraulic cylinder and a reversing pipeline group, wherein the metering hydraulic cylinder is vertically arranged, the reversing pipeline group is used for controlling the flow direction of liquid flow in the metering hydraulic cylinder, the reversing pipeline group comprises an inlet, an outlet and two pairs of four symmetrically-arranged controllers for controlling the opening and closing of the pipeline, each pair of controllers is respectively communicated with one end of the metering hydraulic cylinder, one of the controllers in each pair is communicated with the metering hydraulic cylinder while the other controller is closed, so as to form loops with different flow directions, the inlet is communicated with the single standard metal measuring vessel, the outlet is connected with a subsequent pipeline, the metering hydraulic cylinder is connected with a position sensor and a timing element, the position sensor and the timing element are connected with a single chip microcomputer circuit, and an oil-water proportional differential pressure metering pipeline and an air-liquid proportional differential pressure metering pipeline are respectively arranged on two sides of the metering hydraulic cylinder.
The oil-water ratio differential pressure metering pipeline comprises a differential pressure meter with two ends communicated with different positions of the metering hydraulic cylinder, and the differential pressure meter is an externally sensed gravity type differential pressure meter.
The gas-liquid proportional differential pressure metering pipeline comprises two gas-liquid proportional display elements for respectively measuring two limit positions of the piston, and the two gas-liquid proportional differential pressure metering pipelines are respectively connected with the upper end and the lower end of the metering hydraulic cylinder at the upper limit position and the lower limit position of the piston.
The input end of the single chip microcomputer circuit is connected with the position sensor, the timing element, the oil-water proportional differential pressure metering pipeline and the gas-liquid proportional differential pressure metering pipeline, and the output end of the single chip microcomputer circuit is connected with the controller.
The gas-liquid ratio display element is made of a differential pressure meter.
The position sensor includes a proximity switch mounted at a corresponding location on a single standard metal gauge.
And the pipelines where the inlet and the outlet are arranged are provided with connecting flanges.
The application also relates to a metering method of the three-differential-pressure three-phase flowmeter for the metering station, which comprises the following steps:
(1) the flow is measured between the pipeline reversing, the piston reciprocates in the measuring hydraulic cylinder, the radius of the inner cavity in the measuring hydraulic cylinder is A, the height is C, the thickness of the piston is D, and the measuring hydraulic pressure in unit time tThe reciprocating times of the piston in the cylinder is B, the flow in unit time is S, and S = Pi A2（C-D）B/t；
(2) Measuring differential pressure; 3 differential pressure display meters are arranged at corresponding positions of the piston to correspond to three pipelines, namely an oil-water proportional differential pressure metering pipeline and two gas-liquid proportional differential pressure metering pipelines, one end of the oil-water proportional differential pressure metering pipeline is positioned above a limit station at the bottom of the metering hydraulic cylinder corresponding to the piston, the other end of the oil-water proportional differential pressure metering pipeline is positioned at a middle part A cm of the metering hydraulic cylinder, two ends of the first gas-liquid proportional differential pressure metering pipeline are respectively positioned above the limit stations of the piston, two ends of the second gas-liquid proportional differential pressure metering pipeline are respectively positioned below the two limit stations of the piston, each metering result is set as v megapascal, and is converted into a representative gravity unit u gram and u =50v/49, when the piston cylinder is positioned at the upper limit position or the lower limit position, the valve circuit is opened, the differential pressure meter on the oil-water proportional differential pressure metering pipeline and the differential pressure meter of the second, when the valve piston (9) is at the lower limit position, the valve circuit opens a differential pressure gauge on the oil-water proportional differential pressure measuring pipeline and a differential pressure gauge of the first gas-liquid proportional differential pressure measuring pipeline to record a differential pressure value;
(3) measuring the oil-water ratio; the weight value u 1g of the gravity unit of the differential pressure gauge on the oil-water proportional differential pressure measuring pipeline is measured to obtain the density Q = u 1/A of the liquid in the measuring hydraulic cylinder, the water accounts for the liquid flow rate ratio X, AQ = X +0.8(A-X),
(4) measuring the gas-liquid ratio: when the piston cylinder is located at the same position of the step, the trigger switch controls the gas-liquid proportion differential pressure metering pipeline related to the weight to work, the weight value u2 g of liquid inside the differential pressure meter corresponding to the gas-liquid proportion differential pressure metering pipeline is measured, the liquid level height K = u2/Q is measured, and then the proportion Y = C-K/C of gas is obtained.
The beneficial effects of the utility model reside in that:
the same set of equipment is adopted, the flow of the pipeline, the oil-water ratio of the fluid and the gas-liquid ratio are measured in sequence, the measurement is rapid and accurate, and two oil-water ratio differential pressure measurement pipelines are adopted.
In a whole, compared with a separated measurement, the mixed oil, gas and water three-phase flow measurement device and the mixed oil, gas and water three-phase flow measurement scheme are simpler in structure, smaller in size and lower in manufacturing cost, are convenient to apply to a single well, and are suitable for large-area popularization;
the flange is designed to facilitate the disassembly and assembly of the whole equipment, so that the difficulty in maintenance of the equipment is reduced;
the design of the two gas-liquid proportional display meters can be adapted to the limit stations of the two pistons, and the measurement is accurate.
Drawings
FIG. 1 is a front view of the structure of the present invention;
FIG. 2 is a schematic view of the installation of the oil-water proportional differential pressure measuring pipeline and the gas-liquid proportional differential pressure measuring pipeline of the present invention;
FIG. 3 is a schematic diagram of an input terminal of the controller of the present invention;
names of components in the drawings: 1. a first electrically operated locking valve; 2. a second electrically operated locking valve; 3. a third electric lock valve; 4. a fourth electric lock valve; 5. a flange; 6. a first eddy current proximity switch; 7. a second eddy current proximity switch; 8. a piston is in a virtual position; 9. a piston; 10. a metering hydraulic cylinder; 11. an oil-water proportional differential pressure metering pipeline; 12. a gas-liquid proportional differential pressure metering pipeline; 13. and a controller.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
Example 1
Example 1: a three-pressure-difference three-phase flowmeter for a metering station is designed and connected with a single standard metal measuring unit group by referring to figures 1 to 3, comprises a metering hydraulic cylinder which is vertically arranged and a reversing pipeline group for controlling the flow direction of liquid flow in the metering hydraulic cylinder, the reversing pipeline group comprises an inlet, an outlet and two pairs of four symmetrically-arranged controllers for controlling the opening and closing of the pipeline, each pair of controllers is respectively communicated with one end of the metering hydraulic cylinder, one of the controllers in each pair is communicated with the metering hydraulic cylinder while the other controller is closed, so as to form loops with different flow directions, the inlet is communicated with the single standard metal measuring vessel, the outlet is connected with a subsequent pipeline, the metering hydraulic cylinder is connected with a position sensor and a timing element, the position sensor and the timing element are connected with a single chip microcomputer circuit, and an oil-water proportional differential pressure metering pipeline and an air-liquid proportional differential pressure metering pipeline are respectively arranged on two sides of the metering hydraulic cylinder.
The oil-water ratio differential pressure metering pipeline comprises a differential pressure meter with two ends communicated with different positions of the metering hydraulic cylinder, and the differential pressure meter is an externally sensed gravity type differential pressure meter.
The gas-liquid proportional differential pressure metering pipeline comprises two gas-liquid proportional display elements for respectively measuring two limit positions of the piston, and the two gas-liquid proportional differential pressure metering pipelines are respectively connected with the upper end and the lower end of the metering hydraulic cylinder at the upper limit position and the lower limit position of the piston 9.
The input end of the single chip microcomputer circuit is connected with the position sensor, the timing element, the oil-water proportional differential pressure metering pipeline and the gas-liquid proportional differential pressure metering pipeline, and the output end of the single chip microcomputer circuit is connected with the controller.
The gas-liquid ratio display element is made of a differential pressure meter.
The position sensor includes a proximity switch mounted at a corresponding location on a single standard metal gauge.
And the pipelines where the inlet and the outlet are arranged are provided with connecting flanges 5.
The application also relates to a metering method of the three-differential-pressure three-phase flowmeter for the metering station, which comprises the following steps:
(1) measuring flow during pipeline reversing, enabling a piston 9 to reciprocate in a measuring hydraulic cylinder, enabling the radius of an inner cavity in the measuring hydraulic cylinder to be A, enabling the height of the inner cavity to be C, enabling the thickness of the piston 9 to be D, enabling the reciprocating frequency of the piston 9 in the measuring hydraulic cylinder in unit time t to be B, setting the flow in unit time to be S, and enabling S = pi A2（C-D）B/t；
(2) Measuring differential pressure; 3 differential pressure display meters are arranged at corresponding positions of a piston 9 to correspond to three pipelines, namely, an oil-water proportional differential pressure metering pipeline and two gas-liquid proportional differential pressure metering pipelines, one end of each oil-water proportional differential pressure metering pipeline is positioned above a limit station at the bottom of the corresponding piston 9 of the metering hydraulic cylinder, the other end of each oil-water proportional differential pressure metering pipeline is positioned at the middle part A cm of the metering hydraulic cylinder, two ends of a first gas-liquid proportional differential pressure metering pipeline are respectively positioned above the limit stations of the quantity of the piston 9, two ends of a second gas-liquid proportional differential pressure metering pipeline are respectively positioned below the two limit stations of the piston 9, each metering result is set as v MPa and is converted into a representative gravity unit of u grams, and u =50v/49, when the piston 9 cylinder is positioned at the upper limit position or the lower limit position, a valve circuit is opened, a differential pressure meter on the oil-water proportional differential pressure metering pipeline and a differential pressure meter of the second, when the valve piston 9 is at the lower limit position, the valve circuit opens a differential pressure gauge on the oil-water proportional differential pressure measuring pipeline and a differential pressure gauge of the first gas-liquid proportional differential pressure measuring pipeline to record a differential pressure value;
(3) measuring the oil-water ratio; the weight value u 1g of the gravity unit of the differential pressure gauge on the oil-water proportional differential pressure measuring pipeline is measured to obtain the density Q = u 1/A of the liquid in the measuring hydraulic cylinder, the water accounts for the liquid flow rate ratio X, AQ = X +0.8(A-X),
(4) measuring the gas-liquid ratio: and (3) when the piston 9 cylinder is located at the same position in the step (3), triggering a switch to control the gas-liquid proportional differential pressure metering pipeline to work, measuring a weight value u2 g of liquid inside the differential pressure meter corresponding to the gas-liquid proportional differential pressure metering pipeline, measuring to obtain the liquid level height K = u2/Q, and further obtaining the proportion Y = C-K/C of gas.
The fluid is a mixture of gas, water and oil and enters from an inlet of a three-phase flow meter, if the first electric locking valve is opened, the second electric locking valve is locked, the third electric locking valve is locked, the fourth electric locking valve is opened, the fluid flows in from the inlet, enters the first electric locking valve through a lower pipeline, backs off the valve, enters a lower port of the oil cylinder, enters through the lower port of the oil cylinder, pushes the piston 9 to move upwards, when the piston 9 reaches the upper top end of the oil cylinder, a second eddy current approaches the switch to sense and then transmits a signal to the controller, the controller sends a reversing control command, the first electric locking valve 1 is locked, the second electric locking valve 2 is opened, the third electric locking valve 3 is opened, the fourth electric locking valve 4 is locked to complete reversing, the fluid flows in from the inlet, enters the second electric locking valve through a right pipeline, backs off the valve, and enters an inlet at the upper end of the oil cylinder through an upper pipeline, (at this time, because the fourth electric locking valve is locked, the fluid can not pass through and only can enter from the upper port of the oil cylinder.) the piston 9 moves downwards, the fluid at the lower end of the piston 9 flows into the lower pipeline through the lower port of the oil cylinder, the third electric locking valve is pushed open, enters the left pipeline and flows out from the outlet, when the piston 9 reaches the lower top end of the oil cylinder, the first eddy current proximity switch 6 senses the fluid and then transmits a signal to the controller, the controller sends a reversing control command, the second electric locking valve 2 is locked, the first electric locking valve 1 is opened, the fourth electric locking valve is opened, the third electric locking valve 3 is locked, the actions are repeated, and the reciprocating motion is carried out.
Specific algorithm embodiments are given below:
the algorithm is as follows:
(1) when the height of the differential pressure gauge A is 600mm and the height of the metering hydraulic cylinder is 1100mm, the water density is 1 g-
Oil density of 0.8 g-
，
Suppose that: the differential pressure value is measured to be 50 g, (if the pure water is 60 g, the pure oil is 48 g.) the oil-water mixed density Q is
=0.833333g/
。
And calculating the ratio of oil to water, namely setting the ratio of water to X and the ratio of oil to (600-X), and obtaining an equation of 600 ＊ 0.83333= X + (600-X) 0.8, solving the equation of water = X =100, oil = (600-X) =500, the ratio of oil to water 1/5, 1 minute of water and 5 minutes of oil, wherein the ratio of water to oil is 1/6 and the ratio of oil to 5/6 are calculated respectively.
And (3) continuing gas-liquid ratio calculation: assuming that the differential pressure is 80 grams as measured by the differential pressure gauge, the liquid level should be: setting the liquid level height Kcm to obtain an equation: 0.83333K =80, solving equation K =96cm, liquid level 96cm, oil cylinder 110cm, gas content 110-96 =14cm, gas-liquid ratio 14/96=7/48, and total ratio, gas, 14/110, and liquid 96/110.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a three pressure differential three-phase flowmeter for metering station which characterized in that: the device comprises a single standard metal measuring device group, and a reversing pipeline group which is connected with the single standard metal measuring device group and comprises a vertically installed measuring hydraulic cylinder and a reversing pipeline group for controlling the flow direction of liquid flow in the measuring hydraulic cylinder, wherein the reversing pipeline group comprises an inlet, an outlet and two pairs of symmetrically installed controllers for controlling the opening and closing of pipelines, each pair of controllers is respectively communicated with one end of the measuring hydraulic cylinder, one of each pair of controllers is instantaneously communicated with the measuring hydraulic cylinder, while the other controller is closed to form loops with different flow directions, the inlet is communicated with the single standard metal measuring device, the outlet is connected with a subsequent pipeline, the measuring hydraulic cylinder is connected with a position sensor and a timing element, the position sensor and the timing element are connected with a single chip microcomputer circuit, and an oil-water proportional differential pressure measuring pipeline and an air-liquid proportional differential pressure measuring.
2. The three differential pressure, three phase flow meter for a metering station of claim 1, wherein: the oil-water ratio differential pressure metering pipeline comprises a differential pressure meter with two ends communicated with different positions of the metering hydraulic cylinder, and the differential pressure meter is an externally sensed gravity type differential pressure meter.
3. The three differential pressure, three phase flow meter for a metering station of claim 1, wherein: the gas-liquid proportional differential pressure metering pipeline comprises two gas-liquid proportional display elements for respectively measuring two limit positions of the piston (9), and the two gas-liquid proportional differential pressure metering pipelines are respectively connected with the upper end and the lower end of a metering hydraulic cylinder at the upper limit position and the lower limit position of the piston (9).
4. The three differential pressure, three phase flow meter for a metering station of claim 1, wherein: the input end of the single chip microcomputer circuit is connected with the position sensor, the timing element, the oil-water proportional differential pressure metering pipeline and the gas-liquid proportional differential pressure metering pipeline, and the output end of the single chip microcomputer circuit is connected with the controller.
5. The three differential pressure, three phase flow meter for a metering station of claim 4, wherein: the gas-liquid ratio display element is made of a differential pressure meter.
6. The three differential pressure, three phase flow meter for a metering station of claim 1, wherein: the position sensor includes a proximity switch mounted at a corresponding location on a single standard metal gauge.
7. The three differential pressure, three phase flow meter for a metering station of claim 1, wherein: and the pipelines where the inlet and the outlet are arranged are provided with connecting flanges (5).
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110029985A (en) * | 2019-04-30 | 2019-07-19 | 郑州忠林智能科技有限公司 | Measuring station three pressure difference three-phase flow meters and matched metering method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110029985A (en) * | 2019-04-30 | 2019-07-19 | 郑州忠林智能科技有限公司 | Measuring station three pressure difference three-phase flow meters and matched metering method |
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