CN114458282B - Underground gas-dividing wellhead gas measuring device for oil well - Google Patents
Underground gas-dividing wellhead gas measuring device for oil well Download PDFInfo
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- CN114458282B CN114458282B CN202011135507.XA CN202011135507A CN114458282B CN 114458282 B CN114458282 B CN 114458282B CN 202011135507 A CN202011135507 A CN 202011135507A CN 114458282 B CN114458282 B CN 114458282B
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- 239000003129 oil well Substances 0.000 title claims abstract description 22
- 238000000926 separation method Methods 0.000 claims abstract description 77
- 238000005520 cutting process Methods 0.000 claims abstract description 28
- 238000009826 distribution Methods 0.000 claims abstract description 19
- 230000005484 gravity Effects 0.000 claims abstract description 19
- 238000009792 diffusion process Methods 0.000 claims abstract description 12
- 238000007580 dry-mixing Methods 0.000 claims abstract description 12
- 239000006185 dispersion Substances 0.000 claims abstract description 11
- 239000004576 sand Substances 0.000 claims abstract 3
- 239000007788 liquid Substances 0.000 claims description 47
- 230000008878 coupling Effects 0.000 claims description 15
- 238000010168 coupling process Methods 0.000 claims description 15
- 238000005859 coupling reaction Methods 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 210000005239 tubule Anatomy 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 5
- 238000005259 measurement Methods 0.000 abstract description 14
- 238000005086 pumping Methods 0.000 abstract description 7
- 230000008021 deposition Effects 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 97
- 239000003921 oil Substances 0.000 description 85
- 239000012530 fluid Substances 0.000 description 17
- 238000000034 method Methods 0.000 description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 210000002445 nipple Anatomy 0.000 description 6
- 239000012071 phase Substances 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000010779 crude oil Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000009189 diving Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
- E21B43/38—Arrangements for separating materials produced by the well in the well
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/086—Screens with preformed openings, e.g. slotted liners
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
Abstract
The utility model relates to the field of oil and gas field pumping well metering, in particular to an underground oil well gas dividing wellhead measuring device. The device comprises a wellhead constant-pressure depressurization gas collection device, an underground primary precession vortex sand outlet separation device, an underground secondary sonic cutting diffusion dispersion separation device, an underground tertiary gravity separation gas inlet pump gas distribution device and a ground gas measurement gas collection gas inlet dry mixing device; the wellhead constant-pressure depressurization gas collection device comprises a sleeve, a wellhead four-way valve, a sleeve valve, a gas distribution connector, a casing pressure transmitter, a constant-pressure check valve and an air pump; the wellhead four-way joint is arranged on the sleeve, and the gas distribution joint is respectively connected with the sleeve valve, the sleeve pressure transmitter, the constant pressure check valve and the air pump; the underground primary precession vortex sand outlet separation device, the underground secondary sonic cutting diffusion dispersion separation device and the underground tertiary gravity separation pump inlet gas distribution device are sequentially connected and arranged in the sleeve. The device can simultaneously realize the functions of measuring gas quantity, avoiding airlock, preventing scaling and wax deposition, and overcomes the defects.
Description
Technical Field
The utility model relates to the field of oil and gas field pumping well metering, in particular to an underground oil well gas dividing wellhead measuring device.
Background
At present, the single well gas measuring method of the oil well is mainly a liquid discharging method of a separator, and the single well gas measuring method of the oil well is mainly a fixed type installation mode, is applicable to frequency reduction and is mainly used for verifying liquid and gas quantity. The movable single-well metering truck can realize single-well gas measurement, but because of the large number of wells, the pulling and the transportation are extremely inconvenient, the installation is required to stop the well, and the measurement range of the mass flowmeter and the vortex shedding flowmeter is not applicable to the well, and the gas flowmeter is bad, so that only the liquid measurement can be performed, and the gas measurement can not be performed. The indicator diagram meter does not need an oil measuring device, brings great convenience for measuring the liquid amount, but can not measure the gas production. Meanwhile, if the liquid level is low, the sinking degree is low, and the sleeve pressure is high, the pump efficiency is reduced or the air lock is caused; for the oil well with the sleeve pressure lower than the back pressure, the oil sleeve is communicated with the sleeve gas inlet pipe, and if the pump efficiency is reduced or the gas lock is caused by the influence of the gas, the open sleeve gas measure is adopted, so that the atmospheric pollution and the waste can be caused.
In the oil reservoir development process, when the gas content exceeds 60%, the gas-liquid two-phase content can change in a shaft due to the slip of the gas-liquid two-phase speed. When the gas-liquid two phases with the changed gas content are in the oil pumping process of the oil pump, the gas lock phenomenon can be caused, and even the pump is seriously disabled. Therefore, the downhole gas-liquid separator is used for gas-liquid separation to separate water from gas, thereby avoiding gas lock phenomenon. Even "airlock" can occur in severe cases. When the air lock phenomenon occurs, hydraulic impact can also occur, so that the vibration of the sucker rod pumping system is caused, and the damage of the sucker rod pumping system is accelerated.
In the middle and later stages of oil field exploitation or in the oil wells with low working fluid level (particularly, the oil wells with high gas-liquid ratio), gas is a main factor affecting the pumping efficiency of the oil pump. The gas occupies part of the volume of the pump cavity, so that the fullness in the pump cavity is reduced, the valve ball of the oil pump is delayed to open, and the pump efficiency is reduced. These adverse results may cause frequent operations of the rod-pumped well, shortening the pump inspection period, and increasing the development cost.
The method provides a detailed data foundation for making the diving measures, and takes the natural gas productivity of the quasi-oil well, so that the following problems exist in the existing ground metering: firstly, in order to shorten the pipeline distance, part of pumping wells directly touch a gathering and transportation trunk line and cannot be measured in a station; secondly, the oil well with the pressure lower than the back pressure is sleeved on the standing well, and a separator and a flowmeter cannot be arranged on a wellhead sleeve to measure gas; thirdly, a device for measuring gas by using a separator and a flowmeter is arranged at a wellhead, so that large-scale investment is high; fourth, the well head removes single well metering device, although satisfying the many well metering of an equipment, but need repeated dismouting, frequent well stopping wastes time and energy.
Aiming at the problems that gas measurement cannot be carried out, gas lock of an oil pump is required to be prevented, pump efficiency is improved, thickened oil is not easy to separate oil from gas and wax is difficult to adhere to the parts of the separator, and a downhole gas-liquid separator and a viscosity-reducing and scale-preventing device are installed under a pump in a common mode at present. The utility model of China patent CN210798949U discloses an oil gas wellhead gas measuring device, which comprises a first flat nipple and a second flat nipple, wherein one side of the first flat nipple is provided with a stop valve, the top end of the first flat nipple is connected with a flat coupling through threads, the top end of the flat coupling is connected with a three-way oil nozzle sleeve through an external thread short circuit, a throttling oil nozzle is arranged at an air inlet in the three-way oil nozzle sleeve through an oil nozzle mounting seat, one side of the three-way oil nozzle sleeve is connected with the second flat nipple through threads, and one end of the second flat nipple is connected with a flow meter through a flange plate and bolts.
Chinese patent application CN110173254a provides a downhole double-cylinder single-stage adjusting gas-liquid separator, which is composed of an outer cylinder and an inner cylinder which are mutually sleeved, and an impeller and a liquid discharge section are arranged in the inner cylinder; a separation baffle is arranged below the gas phase outlet at the top of the outer cylinder body, and a gravity separation chamber is arranged between the inner cylinder body and the gas phase outlet; the side wall of the lower part of the outer cylinder body is provided with a liquid phase outlet, the controller acquires the pressure difference measured in real time by the differential pressure sensor, compares the pressure difference measured in real time with a set pressure difference, and drives the motor to control the size of the liquid phase outlet according to the comparison result. According to the utility model, primary separation is realized through the cooperation of the impeller and the liquid discharge section, and secondary separation is realized by means of the gravity separation chamber; three times of separation are realized by utilizing a separation baffle; the centrifugal separation, gravity separation and collision separation are organically combined, the volume is small, the structure is compact, and the high-efficiency separation of the gas-liquid mixture can be realized under wider gas phase and liquid phase processes.
Chinese patent No. CN206376853U discloses a downhole gas-liquid separator with gas-liquid separation main body, gas-liquid separation cover and gas-liquid external screw; the gas-liquid separation main body is positioned in a cavity surrounded by the upper shell, the liquid inlet shell and the lower shell, and is formed by sequentially connecting an upper gas-liquid separation main body transmission shaft, a gas-liquid separation main body diversion section, a gas-liquid separation main body inverted cone section and a lower gas-liquid separation main body transmission shaft from top to bottom; a guide vane is welded outside the guide section of the gas-liquid separation main body; an air inlet hole is formed in the reverse taper section of the gas-liquid separation main body, and an outlet of the air duct is positioned in the inner cavity of the upper shell; the gas-liquid separation cover is in a hollow inverted frustum shape, and the gas-liquid outer spiral body is also in a hollow inverted frustum shape.
However, the existing underground gas-liquid separator is not ideal and not thorough in gas-liquid separation effect, poor in separation effect, and easy to mix gas and liquid again after separation into an oil pump because gas cannot fully enter an oil sleeve annulus; the viscosity-reducing, scale-preventing and wax-depositing-preventing device has the functions of reducing viscosity, preventing scale and preventing gas separation. If the gas produced in the oil sleeve annulus is directly measured at the ground, the measured gas quantity is inaccurate and less because the gas-liquid separation effect is not thorough.
Disclosure of Invention
The utility model mainly aims to provide an underground gas-dividing wellhead measuring device for an oil well, which can simultaneously realize the functions of measuring gas quantity, avoiding airlock, preventing scaling and preventing wax deposition and overcomes the defects.
In order to achieve the above purpose, the present utility model adopts the following scheme:
the utility model provides an oil well underground gas-dividing wellhead measuring device, which comprises a wellhead constant-pressure depressurization gas-collecting device, an underground primary precession vortex desanding and separating device, an underground secondary sonic cutting, diffusing and dispersing and separating device, an underground tertiary gravity separation gas-inlet pump gas-dividing device and a ground gas-measuring gas-collecting gas-inlet dry-mixing and conveying device;
the wellhead constant-pressure depressurization gas collection device comprises a sleeve, a wellhead four-way valve, a sleeve valve, a gas distribution connector, a casing pressure transmitter, a constant-pressure check valve and an air pump; the wellhead four-way joint is arranged on the sleeve, and the gas distribution joint is respectively connected with the sleeve valve, the sleeve pressure transmitter, the constant pressure check valve and the air pump;
the underground primary precession vortex desanding separation device, the underground secondary sonic cutting diffusion dispersion separation device and the underground tertiary gravity separation pump inlet gas separation device are connected in sequence and are arranged in the sleeve;
the ground gas-measuring gas-collecting gas-feeding dry-mixing device is connected with a wellhead four-way valve.
Preferably, the downhole primary precession vortex sand-discharging separation device comprises a plug, a tail pipe, a primary oil-liquid inlet tubule and an air outlet pipe; the air outlet pipe is connected with the tail pipe; the primary oil inlet tubule is arranged in a cavity formed by the tail pipe; the bottom of the cavity formed by the tail pipe is sealed by a plug.
Further preferably, two primary oil inlet holes are symmetrically arranged on the tail pipe, and primary air outlet holes are arranged at the joint of the air outlet pipe and the tail pipe.
Further preferably, a spiral sheet is arranged in the primary oil inlet liquid thin pipe.
The underground primary precession vortex desanding and separating device is used for primarily separating gas from liquid and desanding the entering fluid, the well fluid enters a primary oil inlet hole and is separated by a spiral sheet, gas enters an air outlet pipe from a primary air outlet hole, and oil enters a primary oil inlet liquid thin pipe and rises to an underground secondary sound wave cutting diffusion and dispersion separation part.
Preferably, the underground secondary sound wave cutting, diffusing, dispersing and separating device comprises fixing ribs, fixing rods, connecting pipes, longitudinal cutting plates, transverse baffles, primary throats, secondary throats and sieve plates; the fixed rod, the connecting pipe, the longitudinal cutting plate, the transverse baffle, the primary throat pipe, the secondary throat pipe and the sieve plate are connected in sequence; the fixed rod is connected to the tail pipe through a fixed rib.
Further preferably, the fixed rod is provided with a plurality of vibration steel sheets; the vibration steel sheet forms an angle of 45 degrees with the vertical direction of the fixed rod, and is distributed on two sides of the fixed rod.
The underground secondary sound wave cutting diffusion dispersion separation device is used for carrying out scale prevention and wax control, cutting subdivision viscosity reduction, diffusion decomposition and gas separation on fluid separated at one time, the fluid separated at one time enters a primary throat pipe and a secondary throat pipe through a vibration steel sheet, a connecting pipe, a longitudinal cutting plate and a transverse baffle plate, and then rises to an underground three-time gravity separation pump gas separation part through a screen plate.
Preferably, the underground three-time gravity separation pump inlet gas distribution device comprises a fixed plate, a conversion coupling, a secondary oil outlet pipe and a pump pipe lower joint; the fixed plate is connected through the conversion coupling, and the fixed plate is connected with secondary play oil pipe, and secondary play oil pipe is connected with pump line lower clutch.
Further preferably, the fixed plate is provided with a plurality of plate holes, the air outlet pipe is connected with the fixed plate, and a secondary oil inlet hole and a secondary air outlet hole are arranged near the connecting port; the secondary oil outlet pipe is provided with a secondary oil outlet.
The underground three-time gravity separation air inlet pump air distribution device is used for re-separating fluid subjected to secondary separation, so that the air content of the fluid is guaranteed to be close to zero, the hole of a fluid plate subjected to secondary separation and the secondary oil inlet hole are re-separated, the separated fluid ascends into an oil pump through the secondary oil outlet hole and the secondary oil outlet pipe, and the separated air enters an air outlet pipe from the secondary air outlet hole and enters a wellhead constant-pressure reducing air collection part.
Preferably, the ground gas-measuring gas-collecting gas-feeding dry mixing device comprises a precession vortex flowmeter, a bypass valve, a uniflow valve, a wellhead pipeline, a back pressure valve, a nozzle tip sleeve, a production valve and a small tee joint; the precession vortex flowmeter is respectively connected with the constant pressure check valve, the air pump, the bypass valve and the check valve through pipelines; the bypass valve is also connected with a constant pressure check valve, an air extracting pump and a check valve respectively through pipelines, and the check valve is connected with a wellhead pipeline; the small tee joint is connected with the wellhead four-way joint, the small tee joint, the production valve, the choke sleeve and the wellhead pipeline are sequentially connected, and the wellhead pipeline is also connected with the back pressure valve.
The ground gas-measuring gas-collecting gas-feeding dry-mixing conveying device is used for metering and recovering gas after passing through a wellhead constant-pressure-reducing gas-collecting part, and the gas passes through a constant-pressure uniflow valve or an air extracting pump and enters into a wellhead pipeline to collect gas through a vortex flow meter, a bypass valve or a uniflow valve. The liquid passing through the secondary oil outlet pipe rises into the oil pump, and enters the ground oil collecting pipeline through the wellhead four-way, the small tee joint, the production valve, the oil nozzle sleeve, the wellhead pipeline and the back pressure valve.
The tail pipe is connected with the connecting pipe through the fixing rod pipe body in a threaded manner, the connecting pipe is connected with the primary throat pipe and the secondary throat pipe through the transverse baffle pipe body in a threaded manner, the primary throat pipe and the secondary throat pipe are connected with the conversion hoop pipe through the sieve plate pipe body in a threaded manner, and the conversion coupling 18 pipe is connected with the secondary oil outlet pipe in a threaded manner.
The casing pressure transmitter has an infinite transmission function, and well site RTU acquires casing pressure data and transmits the casing pressure data to the PCS system through a network bridge and a base station.
The precession vortex flowmeter has an infinite transmission function, and well site RTU (real time unit) acquired gas volume data are transmitted to the PCS system through a network bridge and a base station.
Compared with the prior art, the utility model has the following advantages:
(1) The device of the utility model can effectively separate underground gas and liquid, so that the gas in the well liquid is zero; the separated natural gas rapidly enters the oil sleeve annulus and rises to the wellhead.
(2) The device of the utility model avoids the airlock of the oil pump and improves the pump efficiency; after the underground crude oil enters the device and is subjected to three separation and degassing and desanding by primary precession vortex desanding separation, secondary sonic wave cutting diffusion dispersion separation, three-time gravity separation and the like, the gas-free crude oil enters the oil pump, so that the expansion of natural gas in the oil pump is avoided, the filling coefficient of the oil pump is improved, and the gas lock of the oil pump is avoided.
(3) The device can prevent wax deposition and scaling for thick oil wells, wax deposition wells and scaling wells, and realize full gas-liquid separation.
(4) The device has no separating device on the ground, directly and continuously measures gas at the wellhead, and the device is simple, safe and reliable; the device can also monitor the casing pressure and collect the gas production through a remote control; the sleeve pressure is lower than the back pressure, the air extracting pump is started, the air distribution measurement is carried out, the sinking degree is increased, and the single well yield is improved. After the device is applied to a gas producing oil well, the gas quantity measurement detection rate of the wellhead of the gas producing oil well is 100%, the pump efficiency of the wellhead of the gas producing oil well is improved by 5%, the full accuracy of oil well data is 100%, dynamic analysis is met, the dynamic problem and potential of an oil reservoir are found in time, and the annual oil increment is predicted to be 0.15 ten thousand tons. Reducing the pressure and increasing the yield of the casing gas, predicting 0.1 ten thousand tons of annual oil increase, predicting 0.25 ten thousand tons of annual oil increase, and calculating according to 1000 yuan of profit of internal ton oil, thereby creating an annual effect: 250-10=240 ten thousand yuan.
(5) The device is popularized and applied to the wellhead of the gas production oil well without the gas measurement device, solves the problem that the gas measurement cannot be performed by the work diagram after the measurement station is canceled, and has extremely high application value.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.
FIG. 1 is a schematic diagram of a downhole gas separation wellhead measurement device according to an embodiment of the present utility model.
In the figure, 1, plug, 2, tail pipe, 3, spiral piece, 4, primary oil inlet pipe, 5, primary oil inlet hole, 6, primary air outlet hole, 7, air outlet pipe, 8, fixing rib, 9, fixing rod, 10, vibration steel sheet, 11, connecting pipe, 12, longitudinal cutting plate, 13, transverse baffle, 14, primary throat, 15, secondary throat, 16, sieve plate, 17, fixing plate, 18, conversion coupling, 19, secondary oil outlet hole, 20, secondary oil outlet pipe, 21, pump pipe lower joint, 22, plate hole, 23, secondary oil inlet hole, 24, secondary oil outlet hole, 25, sleeve pipe, 26, sleeve valve, 27, gas distributing joint, 28, sleeve pressure transmitter, 29, constant pressure single flow valve, 30, air pump, 31, precession flowmeter, 32, bypass valve, 33, single flow valve, 34, wellhead pipeline, 35, back pressure valve, 36, wellhead, 37, small tee joint, 38, production valve and 39.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the utility model. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular forms also are intended to include the plural forms unless the context clearly indicates otherwise, and furthermore, it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, and/or combinations thereof.
In order to enable those skilled in the art to more clearly understand the technical scheme of the present utility model, the technical scheme of the present utility model will be described in detail with reference to specific embodiments.
Examples
As shown in fig. 1, the downhole gas-dividing wellhead measuring device for an oil well comprises: the device comprises a wellhead constant-pressure depressurization gas collection device, an underground primary precession vortex desanding separation device, an underground secondary sonic cutting diffusion dispersion separation device, an underground tertiary gravity separation gas inlet pump gas distribution device and a ground gas measurement gas collection gas inlet dry mixing device;
the wellhead constant-pressure depressurization gas collection device comprises a sleeve 25, a wellhead four-way valve 36, a sleeve valve 26, a gas distribution joint 27, a casing pressure transmitter 28, a constant-pressure check valve 29 and an air pump 30; the wellhead four-way valve 36 is arranged on the sleeve 25, and the gas distribution joint 27 is respectively connected with the sleeve valve 26, the sleeve pressure transmitter 28, the constant pressure check valve 29 and the air pump 30;
the underground primary precession vortex desanding separation device, the underground secondary sonic cutting diffusion dispersion separation device and the underground tertiary gravity separation pump inlet gas separation device are sequentially connected and arranged in the sleeve.
The wellhead constant pressure depressurization gas collection device is used for controlling gas in a sleeve to enter the ground through a wellhead, and the separated gas passes through the sleeve 25, a wellhead four-way valve 36, a sleeve valve 26 and a gas distribution joint 27, when the sleeve pressure is greater than a constant pressure value of a constant pressure check valve 29 or the sleeve pressure is greater than back pressure, the gas passes through the constant pressure check valve 29; when the sleeve pressure is smaller than the constant pressure value of the constant pressure check valve 29 or the sleeve pressure is smaller than the back pressure, the gas enters the ground gas measurement and collection dry mixing part through the air pump 30.
The underground primary precession vortex desanding and separating device comprises a plug 1, a tail pipe 2, a primary oil inlet tubule 4 and an air outlet pipe 7; the air outlet pipe 7 is connected with the tail pipe 2; the primary oil inlet tubule 4 is arranged in a cavity formed by the tail pipe 2; the bottom end of the cavity formed by the tail pipe 2 is sealed by a plug 1.
Two primary oil inlet holes 5 are symmetrically arranged on the tail pipe 2, and a primary air outlet hole 6 is arranged at the joint of the air outlet pipe 7 and the tail pipe 2. The primary oil inlet tubule 4 is internally provided with a spiral sheet 3.
The underground primary precession vortex desanding and separating device is used for primarily separating gas from liquid and desanding the entering fluid, the in-well fluid enters the primary oil inlet hole 5 and is separated by the spiral sheet 3, gas enters the air outlet pipe 7 from the primary air outlet hole 6, and the oil enters the primary oil inlet tubule 4 and rises to the underground secondary sonic wave cutting diffusion dispersion separation part. The tail pipe 2 is in threaded connection with the connecting pipe 11 through the fixing rod 9, the connecting pipe 11 is in threaded connection with the first-stage throat 14 and the second-stage throat 15 through the transverse baffle 13, the first-stage throat 14 and the second-stage throat 15 are in threaded connection with the conversion coupling 18 through the sieve plate 16, and the conversion coupling 18 is in threaded connection with the secondary oil outlet pipe 20.
The underground secondary sound wave cutting, diffusing, dispersing and separating device comprises a fixing rib 8, a fixing rod 9, a connecting pipe 11, a longitudinal cutting plate 12, a transverse baffle 13, a primary throat 14, a secondary throat 15 and a screen plate 16; the fixed rod 9, the connecting pipe 11, the longitudinal cutting plate 12, the transverse baffle 13, the primary throat 14, the secondary throat 15 and the screen plate 16 are connected in sequence; the fixing rod 9 is connected to the tail pipe 2 through the fixing rib 8.
The fixed rod 8 is provided with a plurality of vibration steel sheets 10; the vibration steel sheet 10 forms an angle of 45 degrees with the vertical direction of the fixed rod 9, and is distributed on two sides of the fixed rod 9.
The secondary sound wave cutting, diffusing, dispersing and separating device is used for preventing scale and wax, cutting, subdividing, reducing viscosity, diffusing, decomposing and separating gas of fluid separated at one time, the fluid separated at one time enters a primary throat 14 and a secondary throat 15 through a vibration steel sheet 10, a connecting pipe 11, a longitudinal cutting plate 12 and a transverse baffle 13, and then rises to a pump gas separating part for three times of gravity separation in the pit through a screen plate 16.
The underground three-time gravity separation pump inlet gas distribution device comprises a fixed plate 17, a conversion coupling 18, a secondary oil outlet pipe 20 and a pump pipe lower joint 21; the fixed plate 17 body is connected with the sieve plate 16 body through the conversion coupling 18 body, the fixed plate 17 is connected with the secondary oil outlet pipe 20, the secondary oil outlet pipe 20 is connected with the pump pipe lower joint 21, and the pump pipe lower joint 21 is in threaded connection with the upper pipe pump.
The fixed plate 17 is provided with a plurality of plate holes 22, the air outlet pipe 7 is connected with the fixed plate 17, and a secondary oil inlet hole 23 and a secondary air outlet hole 24 are arranged near the connecting port; the secondary oil outlet pipe 20 is provided with a secondary oil outlet hole 19.
The underground three-time gravity separation air inlet pump air distribution device is used for re-separating fluid subjected to secondary separation, so that the air content of the fluid is guaranteed to be close to zero, the fluid plate holes 22 and the secondary oil inlet holes 23 of the secondary separation are separated, the separated fluid ascends into an oil pump through the secondary oil outlet holes 19 and the secondary oil outlet pipes 20, and the separated gas secondary air outlet holes 24 enter the air outlet pipe 7 and enter the wellhead constant-pressure reduction air collection part.
The ground gas-measuring gas-collecting gas-feeding dry mixing device comprises a precession vortex flowmeter 31, a bypass valve 32, a uniflow valve 33, a wellhead pipeline 34, a back pressure valve 35, a nozzle tip 39, a production valve 38 and a small tee 37; the precession vortex flowmeter 31 is respectively connected with the constant pressure check valve 29, the air pump 30, the bypass valve 32 and the check valve 33 through pipelines; the bypass valve 32 is also respectively connected with the constant pressure check valve 29, the air pump 30 and the check valve 33 through pipelines, and the check valve 33 is connected with the wellhead pipeline 34; the small tee 37 is connected with the wellhead four-way valve 36, the small tee 37, the production valve 38, the choke sleeve 39 and the wellhead pipeline 34 are sequentially connected, and the wellhead pipeline 34 is also connected with the back pressure valve 35.
The ground gas-measuring gas-collecting gas-feeding dry-mixing conveying device is used for metering and recovering gas after passing through a wellhead constant-pressure-reducing gas-collecting part, and the gas passes through a constant-pressure uniflow valve 29 or an air pump 30, and enters a wellhead pipeline 34 for gas-collecting through a precession vortex flowmeter 31, a bypass valve 32 or a uniflow valve 33. The liquid passing through the secondary oil outlet pipe 20 rises into the oil pump, and enters the ground oil collecting pipeline through the wellhead four-way 36, the small tee 37, the production valve 38, the choke sleeve 39, the wellhead pipeline 34 and the back pressure valve 35.
Example 2
The method of using the device described in example 1: in the production process, crude oil enters a downhole once-screwed vortex sand-discharging separation device through a tail pipe 2, sequentially enters a vibrating steel sheet 10, a connecting pipe 11, a longitudinal cutting plate 12, a transverse baffle 13, a primary throat 14, a secondary throat 15, a screen plate 16, a conversion coupling 18, a secondarily-separated oil-water inlet secondary oil outlet 19 and a secondarily-separated gas inlet secondary air outlet 24 through a spiral sheet 3, a primarily-separated oil-water inlet oil-liquid inlet pipe 4 and a primarily-separated gas inlet and outlet pipe 7. The secondarily separated oil and water enters the oil pump through the secondary oil outlet 19, sequentially enters the wellhead pipeline 34 through the wellhead four-way 36, the small tee 37, the production valve 38 and the oil nozzle sleeve 39, and is then externally conveyed through the back pressure valve 35. The secondary separated gas is mixed with the primary separated gas through the secondary gas outlet hole 24 to jointly enter and exit the gas pipe 7, and sequentially enters and exits the wellhead pipeline 34 through the sleeve 25, the sleeve valve 26, the gas separation joint 27, the sleeve pressure transmitter 28, the constant pressure uniflow valve 29, the air pump 30, the precession vortex flowmeter 31 or the bypass valve 32 and the uniflow valve 33.
The above examples are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present utility model should be made in the equivalent manner, and the embodiments are included in the protection scope of the present utility model.
Claims (4)
1. The underground gas-dividing wellhead measuring device is characterized by comprising a wellhead constant-pressure depressurization gas-collecting device, an underground primary precession vortex sand-discharging separation device, an underground secondary sonic cutting diffusion dispersion separation device, an underground tertiary gravity separation gas-inlet pump gas-dividing device and a ground gas-measuring gas-collecting gas-inlet dry-mixing device;
the wellhead constant-pressure depressurization gas collection device comprises a sleeve, a wellhead four-way valve, a sleeve valve, a gas distribution connector, a casing pressure transmitter, a constant-pressure check valve and an air pump; the wellhead four-way joint is arranged on the sleeve, and the gas distribution joint is respectively connected with the sleeve valve, the sleeve pressure transmitter, the constant pressure check valve and the air pump;
the underground primary precession vortex sand outlet separation device, the underground secondary sonic cutting diffusion dispersion separation device and the underground tertiary gravity separation pump inlet gas distribution device are connected in sequence and are arranged in the sleeve;
the ground gas-measuring gas-collecting gas-feeding dry-mixing device is connected with a wellhead four-way valve;
the underground primary precession vortex sand-discharging separation device comprises a plug, a tail pipe, a primary oil-liquid inlet tubule and an air outlet pipe; the air outlet pipe is connected with the tail pipe; the primary oil inlet tubule is arranged in a cavity formed by the tail pipe; the bottom end of the cavity formed by the tail pipe is sealed by a screwed plug;
the underground secondary sound wave cutting, diffusing, dispersing and separating device comprises fixing ribs, fixing rods, connecting pipes, longitudinal cutting plates, transverse baffles, primary throats, secondary throats and sieve plates; the fixed rod, the connecting pipe, the longitudinal cutting plate, the transverse baffle, the primary throat pipe, the secondary throat pipe and the sieve plate are connected in sequence; the fixed rod is connected to the tail pipe through a fixed rib;
the underground three-time gravity separation pump inlet gas distribution device comprises a fixed plate, a conversion coupling, a secondary oil outlet pipe and a pump pipe lower joint; the fixed plate is connected with the sieve plate through a conversion coupling, the fixed plate is connected with a secondary oil outlet pipe, and the secondary oil outlet pipe is connected with a lower joint of the pump pipe;
the ground gas-measuring gas-collecting gas-feeding dry mixing device comprises a precession vortex flowmeter, a bypass valve, a uniflow valve, a wellhead pipeline, a back pressure valve, a nozzle tip sleeve, a production valve and a small tee joint; the precession vortex flowmeter is respectively connected with the constant pressure check valve, the air pump, the bypass valve and the check valve through pipelines; the bypass valve is also connected with a constant pressure check valve, an air extracting pump and a check valve respectively through pipelines, and the check valve is connected with a wellhead pipeline; the small tee joint is connected with the wellhead four-way joint, the small tee joint, the production valve, the choke sleeve and the wellhead pipeline are sequentially connected, and the wellhead pipeline is also connected with the back pressure valve;
the primary oil inlet liquid tubule is internally provided with a spiral sheet, and the fixed rod is provided with a plurality of vibration steel sheets;
the fixed plate is provided with a plurality of plate holes, the air outlet pipe is connected with the fixed plate, and a secondary oil inlet hole and a secondary air outlet hole are arranged near the connecting port; the secondary oil outlet pipe is provided with a secondary oil outlet.
2. The downhole gas-dividing wellhead measuring device for oil well according to claim 1, wherein two primary oil inlet holes are symmetrically arranged on the tail pipe, and primary gas outlet holes are arranged at the joint of the gas outlet pipe and the tail pipe.
3. The downhole gas-dividing wellhead measuring device of claim 1, wherein the vibrating steel plates are distributed on two sides of the fixed rod at an angle of 45 degrees to the vertical direction of the fixed rod.
4. The downhole gas-dividing wellhead measuring device for oil wells according to any one of claims 1 to 3, wherein the tail pipe is in threaded connection with the connecting pipe through a fixed rod pipe body, the connecting pipe is in threaded connection with the primary throat pipe and the secondary throat pipe through a transverse baffle pipe body, the primary throat pipe and the secondary throat pipe are in threaded connection with the conversion coupling pipe through a sieve plate pipe body, and the conversion coupling pipe is in threaded connection with the secondary oil outlet pipe.
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