CN213087983U - Automatic calibration box for oil well liquid production amount - Google Patents

Abstract

The utility model discloses an automatic case of maring of liquid measure is produced to oil well should mark the case and comprise automatic three-way valve, buffer tank, uncovered standard case, differential pressure transmitter, automatic control, electronic positive displacement pump, valve and pipeline etc.. The automatic valve, the differential pressure transmitter and the electric pump are all connected to the automatic controller, and the automatic controller collects the numerical value of the differential pressure transmitter and controls the automatic valve and the electric pump to act. The oil well liquid production amount is calibrated by adopting the calibration box, the manual measuring scale volume calibration and the automatic quality and yield calibration can be carried out, one-time pipeline connection is realized on the same well head, and the function of calibrating the oil well liquid production amount for multiple times is realized.

Description

Automatic calibration box for oil well liquid production amount

Technical Field

The utility model relates to a carry out automatic calibration's measuring equipment to the liquid production capacity of oil well belongs to oil field oil well production measurement technical field.

Background

In oil well production, the accurate calibration of the liquid yield of an oil well is an indispensable production technical content, and the traditional calibration method is to connect a tank body into an oil outlet pipeline of the oil well, load liquid for a preset time, then detach a connecting pipeline, transport the tank body to an oil gathering station, weigh and discharge the liquid by a manual measuring scale or a platform scale, and calculate the liquid quantity value according to the measuring scale or weighing result. Because the distance between the oil collecting station and the oil well is long, liquid receiving and discharging in the calibration process need to be matched by a plurality of people, and the whole process of once calibration of one oil well can take one day or more. The automatic calibration box can calibrate the oil well for multiple times at the wellhead without going to and fro the oil collecting station, thereby thoroughly simplifying the calibration process and saving a large amount of labor and cost. Meanwhile, the automatic calibration box adopts a multi-time calibration method, so that the calibration result of the oil well liquid production amount is more accurate.

Disclosure of Invention

This use is novel to the complicated, the problem that wastes time and energy of calibration flow of oil well, provides a well head automatic calibration case, and this automatic calibration case adopts uncovered case to be equipped with automatic valve, electronic positive displacement pump, differential pressure transmitter, automatic control mode, once inserts the oil well pipeline at the well head, can carry out calibration measurement many times to the oil well, has solved the difficult problem that the oil well in the past markd the existence. Meanwhile, the automatic calibration box has the advantages of small volume, compact structure, economy and durability.

The utility model discloses an automatic case of maring of liquid measure is produced to oil well adopts following technical scheme:

the automatic calibration box for the oil well liquid production amount consists of an automatic three-way valve, a liquid inlet buffer tank, an open standard box, a differential pressure transmitter, an automatic controller, an electric liquid discharge pump, a valve, a pipeline and the like, and all electric devices and instruments are connected with the automatic controller. The automatic calibration box for the liquid yield of the oil well can perform multiple times of manual measuring scale volume calibration and automatic quality calibration on the yield of the same oil well after the well head is connected with a pipeline for one time.

The bearing measuring container of the oil well output liquid adopts an open standard box, which is beneficial to calibration of a manual measuring scale. The front end of the open standard box is provided with an automatic three-way valve and a matched pipeline, the automatic three-way valve is an L-shaped three-way ball valve, and the automatic three-way valve is designed compactly and generally adopts an electric L-shaped three-way ball valve. One path of the two output connecting pipelines is connected to the open standard box, and the other path is connected to the production trunk. Under the control of the automatic controller, the electric three-way valve acts to automatically reverse the incoming liquid of the oil well.

At uncovered standard case inlet installation buffer tank, carry out liquid-gas separation and buffering, make oil well output liquid steadily flow into the standard case, avoid liquid to produce and splash and mix the foam to it is more accurate to guarantee artifical measuring tape.

The liquid outlet of the open standard box is provided with an electric liquid discharge pump, so that the liquid in the standard box is conveyed to a production main line, and the volume calibration of the manual measuring scale for many times is realized in the same oil well.

And a differential pressure transmitter is arranged on the open standard box and is matched with the automatic controller to be used for measuring the quality of the liquid in the standard box. The lower end sensor of the differential pressure transmitter is arranged at the bottom of the box body, and the upper end sensor is arranged at the top of the box body. For a cylindrical, rectangular or square standard box body with constant sectional area in the vertical direction, the calculation formula of the liquid quality in the box body is as follows:

M＝ΔP*S/98

wherein: m-mass of liquid in tank, kg

Δ P-measured value of differential pressure transmitter, kPa

S-sectional area of can body, cm²

The automatic controller measures the total mass m of the liquid filled in the standard box according to the value of the differential pressure transmitter_iAnd the time t of filling liquid this time_iAnd the automatic calibration of the primary quality and yield is realized.

The automatic controller controls the electric drain pump to work, and liquid in the standard tank is drained (the differential pressure value is changed into 0, namely the liquid in the standard tank is completely drained). And after the liquid in the standard tank is emptied, the automatic controller closes the electric pump. And carrying out liquid feeding and automatic calibration measurement of the next time of the standard box.

The daily liquid yield calibrated by the single oil well is converted by the automatic controller:

Q_i＝(m_i/1000)*(24/t_i)

after automatic calibration for many times, the automatic controller converts the daily liquid production amount calibrated for many times of the oil well:

Q_d＝(∑(m_i/1000)*(24/t_i))/n

wherein:

i- - -number of calibrations i ═ 1,2,3 … … n

m_i- -measured mass of liquid, kg, at the i th calibration of the standard cell

t_i-the measurement of the ith calibration of the standard boxLiquid filling time of h

Q_i- -daily fluid production, t/d, for a single well calibration

Q_d- -daily fluid production, t/d, calibrated for a plurality of wells

Drawings

Fig. 1 is a schematic structural diagram of the automatic calibration box for oil well liquid production amount of the utility model.

Wherein: 1-oil well liquid inlet connecting pipe, 2-electric three-way valve, 3-standard tank liquid inlet pipeline, 4-buffer tank, 5-open standard tank, 6-differential pressure transmitter, 7-automatic controller, 8-standard tank liquid outlet pipeline, 9-electric pump switch box, 10-electric liquid outlet pump, 11-liquid outlet pipeline check valve, 12-oil well liquid inlet bypass pipeline check valve, 13-standard tank liquid outlet bypass ball valve, 14-liquid outlet pipeline

Detailed Description

The utility model discloses a concrete implementation mode:

1. the liquid inlet pipe 1 is communicated with the oil well pipeline for liquid inlet, and the liquid outlet pipe 12 is connected to the trunk line.

2. The automatic controller and the electric pump switch box are respectively connected with power supplies (AC220V and AC 380V).

3. The automatic controller 4 controls the action of the electric three-way valve to change the produced liquid of the oil well to the liquid inlet pipeline 3 of the standard box.

4. The produced fluid of the oil well enters a buffer tank 4 through a pipeline 3 and then flows into an open standard box 5, and a valve 13 and an electric pump 10 are both in a closed state.

5. The volume yield calibration mode of the oil well:

5.1 the automatic controller 7 controls the action of the electric three-way valve 2 according to the preset timing, and the produced fluid of the oil well is reversed to a bypass pipeline and is directly conveyed to a production main line.

5.2 manually measuring the volume value of the liquid in the standard box, and converting the daily output according to time.

5.3 starting the electric liquid discharge pump by using the automatic controller to empty the liquid in the standard tank.

And 5.4, repeating the steps 5.1-5.3 for multiple times to obtain the volume values of the liquid yield for multiple times, and obtaining the daily yield value of the oil well after average calculation.

6. The oil well quality and yield calibration mode is as follows:

6.1 the automatic controller 7 controls the action of the electric three-way valve to guide the produced liquid of the oil well to the open standard box 5.

6.2 the automatic controller 7 measures the mass value of the liquid in the standard tank 5 in real time by means of the differential pressure transmitter 6 and simultaneously measures the time value of the liquid entering the tank. The general measuring tank is a cylindrical tank or a rectangular tank, and the calculation formula of the liquid mass in the tank is as follows:

M＝ΔP*S/98

wherein: m-mass of liquid in tank, kg

Δ P-measured value of differential pressure transmitter, kPa

S-sectional area of can body, cm²

6.3 when the liquid inlet quantity in the standard box 5 reaches a preset quality value, the controller 7 drives the electric three-way valve 2 to change the direction, and the incoming liquid of the oil well is guided to the bypass pipeline.

6.4 the automatic controller accurately measures the final total mass m of the liquid filled in the standard box according to the value of the differential pressure transmitter_iAnd the time t of filling liquid this time_iAnd the automatic calibration of the primary quality and yield is realized.

6.5 the automatic controller 7 controls the electric pump 10 to be turned on to empty the liquid in the standard tank (when the differential pressure value becomes 0, it means that all the liquid in the standard tank is empty). And after the liquid in the standard tank is emptied, the automatic controller controls the electric pump to be closed.

6.6 repeating the steps 6.1-6.5 for a plurality of times to obtain the liquid yield quality value for a plurality of times, and obtaining the daily yield value of the oil well after average calculation.

6.7 automatic quality calibration calculation of oil well liquid production by automatic controller

The daily liquid yield calibrated by the single oil well is converted by the automatic controller:

Q_i＝(m_i/1000)*(24/t_i)

after automatic calibration for many times, the automatic controller converts the daily liquid production amount calibrated for many times of the oil well:

Q_d＝(∑(m_i/1000)*(24/t_i))/n

wherein:

i- - -number of calibrations i ═ 1,2,3 … … n

m_i- -measured mass of liquid, kg, at the i th calibration of the standard cell

t_i- -measured fill time, h, at calibration of the standard tank for the ith time

Q_i- -daily fluid production, t/d, for a single well calibration

Q_d- -daily fluid production, t/d, calibrated for a plurality of wells

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, supplement, equivalent replacement, etc. made within the technical essence and principle of the present invention are still within the protection scope of the present invention.

Claims (8)

1. An automatic calibration box for oil well liquid production capacity is characterized by comprising an automatic three-way valve, a buffer tank, an open standard box, a differential pressure transmitter, an automatic controller, an electric liquid discharge pump, a valve and a pipeline; the liquid inlet of the electric three-way valve is connected with a liquid inlet pipeline of the oil well, one of two outlets of the electric three-way valve is connected with the buffer tank through a pipeline, and the other outlet of the electric three-way valve is connected with the check valve and the liquid outlet pipeline through a pipeline; the outlet of the buffer tank is connected with an open standard tank, and the outlet at the lower part of the open standard tank is connected with an electric liquid discharge pump, a check valve and a liquid outlet pipeline through pipelines; a differential pressure transmitter is arranged on the side wall of the open standard box; all the electric devices and the instruments are connected with the automatic controller through cables.

2. The automatic calibration box for oil well liquid production as described in claim 1, characterized by being equipped with an automatic three-way valve and a pipeline to realize one-time pipeline connection and multiple sampling calibration.

3. The automatic calibration box for the oil well liquid production capacity as claimed in claim 1, which is characterized in that an open standard box is adopted for manual measuring scale volume calibration; the open standard box is provided with an electric drain pump, so that liquid in the standard box is conveyed to a production main line, and the volume calibration of the manual measuring scale for many times is realized in the same oil well.

4. The automatic calibration box for the liquid yield of the oil well as defined in claim 3, characterized in that the open standard box is provided with a differential pressure transmitter, the differential pressure transmitter is matched with an automatic controller for measuring the quality of the liquid in the standard box; the lower end sensor of the differential pressure transmitter is arranged at the bottom of the box body, and the upper end sensor is arranged at the top of the box body; for a cylindrical, rectangular or square standard box body with constant sectional area in the vertical direction, the calculation formula of the liquid quality in the box body is as follows:

M＝ΔP*S/98

wherein: m is the mass kg of liquid in the standard box;

Δ P-differential pressure transmitter measurement kPa;

s-sectional area cm of box body²。

5. The automatic calibration box for oil well liquid production capacity as claimed in claim 3, characterized in that a buffer tank is installed at the inlet of the open standard box, so that the gas-liquid separation is thorough, the liquid flows into the standard box stably without splashing, and the accuracy of manual measuring scale is ensured.

6. The automatic calibration box for oil well liquid production capacity as claimed in claim 1, wherein the automatic controller controls the automatic three-way automatic valve to change direction, so as to realize automatic liquid feeding of the open standard box.

7. The automatic calibration box for oil well liquid production capacity as claimed in claim 1, wherein the automatic controller controls the electric liquid discharge pump to operate to realize automatic liquid discharge of the open standard box.

8. The automatic calibration box for oil well fluid production as set forth in claim 1, wherein the automatic controller measures the total mass m of the fluid filled in the standard box according to the value of the differential pressure transmitter_iAnd the time t of filling liquid this time_iRealizing the automatic calibration of the primary quality and yield; the automatic controller controls the electric liquid discharge pump to work and drain the liquid in the standard tank; after the liquid in the standard tank is emptied, the automatic controller controls the electric pump to be closed; for the next time of standard boxLiquid feeding and automatic calibration measurement;

the daily liquid yield calibrated by the single oil well is converted by the automatic controller:

Q_i＝(m_i/1000)*(24/t_i)

after automatic calibration for many times, the automatic controller converts the daily liquid production amount calibrated for many times of the oil well:

Q_d＝(∑(m_i/1000)*(24/t_i))/n

wherein:

i- - -number of calibrations i ═ 1,2,3 … … n

m_i- -measured mass of liquid, kg, at the i th calibration of the standard cell

t_i- -measured fill time, h, at calibration of the standard tank for the ith time

Q_i- -daily fluid production, t/d, for a single well calibration

Q_d-the daily fluid production, t/d, calibrated for a number of wells.

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