CN104847334A - Online measurement device of producing wellhead oil flow and control method thereof - Google Patents
Online measurement device of producing wellhead oil flow and control method thereof Download PDFInfo
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- CN104847334A CN104847334A CN201510258144.1A CN201510258144A CN104847334A CN 104847334 A CN104847334 A CN 104847334A CN 201510258144 A CN201510258144 A CN 201510258144A CN 104847334 A CN104847334 A CN 104847334A
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Abstract
The invention discloses an online measurement device of producing wellhead oil flow and a control method thereof. The online measurement device comprises a measuring tank, an oil-gas separator plate, an oil incoming pipe, an oil outgoing pipe, a normally-opened oil outlet electromagnetic valve, an oil-gas discharge pipe, a normally-closed oil-gas exhaust electromagnetic valve, a bypass line, a normally-opened bypass electromagnetic valve and a pressure difference transmitter. The bypass line is provided with the normally-opened bypass electromagnetic valve and is then parallelly connected with the oil incoming pipe and the oil outgoing pipe arranged on the measuring tank; the oil-gas separator plate is disposed within the measuring tank and divides the measuring tank into an upper part and a lower part; the oil incoming pipe is connected to the upper portion of the measuring tank; the lower portion of the measuring tank is connected to the oil outgoing pipe; an outlet pipe is serially connected with the normally-opened oil outlet electromagnetic valve and is then connected to the tail end of the bypass line. The top of the measuring tank is connected to the oil-gas discharge pipe, connected to the normally-closed oil-gas exhaust electromagnetic valve and then connected to the tail end of the bypass line. One end of the pressure difference transmitter is mounted at the bottom of the measuring tank.
Description
Technical field
The present invention relates to a kind of production wellhead fluid flow on-line measurement device and control method, belong to the technical field that production wellhead manufacturing parameter gathers.
Background technology
The well head oil flow quantity of current China oil pumper, mostly will not measure, and causes the production status of well head to monitor, also cannot be how much fuel-displaced according to the reality of well head, automatic production control, reduces energy consumption.Therefore, how on-line monitoring is carried out to well head oil flow quantity, become the important topic of studies in China exploitation.
The well head oil flow quantity of current domestic proposition obtains scheme: flow transmitter is directly measured, calculated by indicator card, based on the measurement mechanism of weight method.
Conventional flow transmitter cannot the flow of Measurement accuracy fluid, because resulting fluid is a multiphase flow, have gas, oil, water and particle etc., common flow transmitter accurately cannot measure the flow of multiphase flow medium, and therefore causing cannot practical application; Indicator card calculates, owing to being subject to the impact etc. of different oil pumper model, different downhole parameters, the result calculated often error is very large; Based on the measurement mechanism of weight method, because LOAD CELLS is subject to the impact of on-the-spot vibration, temperature, error is larger;
The shortcoming of existing scheme:
1, conventional flow transmitter cannot Flow Rate Measurement in Multiphase;
2, calculate that resultant error is large by indicator card;
3, based on the measurement mechanism of weight method, because LOAD CELLS disturbs by site environment, error is large.
Summary of the invention
Goal of the invention: the object of the present invention is to provide a kind of production wellhead fluid flow on-line measurement device and the control method thereof that can overcome above-mentioned defect.
Technical scheme: production wellhead fluid flow on-line measurement device of the present invention, comprise measurement tank, oil-gas separating plate, oil inlet pipe, flowline, often output hydraulic fluid port electromagnetic valve, oil gas discharge pipe, normally closed oil gas outlet opening electromagnetic valve, bypass duct, often drive bypass electromagnetic valve and pressure difference transmitter, described bypass duct is arranged after often driving bypass electromagnetic valve with the oil inlet pipe be connected successively, measure tank flowline branch circuit parallel connection, described oil-gas separating plate is arranged to be measured in tank, and measurement tank be separated into measurement tank top and measure tank bottom, described oil inlet pipe is communicated to described measurement tank top, extend downward the bottom measuring tank in the tank body that flowline one end penetrates described measurement tank bottom, the flowline other end is communicated to the end of described bypass duct after connecting again and often outputing hydraulic fluid port electromagnetic valve, the top on described measurement tank top is connected to oil gas discharge pipe, be communicated to normally closed oil gas outlet opening electromagnetic valve and be communicated to again the end of bypass duct, described pressure difference transmitter one end is arranged on the bottom measuring tank bottom, the other end is arranged on the below measuring tank bottom flowline.
Further, described oil-gas separating plate is obliquely installed, and an end position of close oil inlet pipe is lower than the one end near flowline.Such setting can make whole device compacter, saves space.
Further, also comprise PLC, described PLC respectively with often output hydraulic fluid port electromagnetic valve, normally closed oil gas outlet opening electromagnetic valve, often drive bypass electromagnetic valve and be connected with pressure difference transmitter.
The present invention also comprises the control method of the PLC of above-mentioned production wellhead fluid flow on-line measurement device, comprises the following steps:
1) PLC sends instruction, closes and often drives bypass electromagnetic valve, often outputs hydraulic fluid port electromagnetic valve, open normally closed oil gas outlet opening electromagnetic valve, and reads the pressure value P 0 of pressure difference transmitter now;
2) after Δ T time, the pressure value P 1 of pressure difference transmitter is now read;
3) PLC sends instruction, opens and often drives bypass electromagnetic valve, often outputs hydraulic fluid port electromagnetic valve, closes normally closed oil gas outlet opening electromagnetic valve;
4) calculated flow rate F=(P1-P0) * λ/Δ T, in formula, λ is through demarcating the coefficient obtained.
Compared with prior art, its beneficial effect is in the present invention: production wellhead on-line measurement device realizes the on-line measurement of well head oil flow quantity, is convenient to installation and maintenance; With the flow of differential pressure liquid level method Measurement accuracy fluid; Device height is integrated, is convenient to control.
Accompanying drawing explanation
Fig. 1 is production wellhead fluid flow on-line measurement device overall structure schematic diagram of the present invention.
Detailed description of the invention
Below technical solution of the present invention is described in detail, but protection scope of the present invention is not limited to described embodiment.
Embodiment 1:
Fig. 1 is production wellhead digital data acquisition device overall structure schematic diagram of the present invention; As shown in the figure, the inventive system comprises: measure tank 1, oil inlet pipe 3, flowline 4, bypass duct 8, electromagnetic valve and differential pressure pick-up 10 and form, under normal conditions, gas mixture flows away from bypass duct, does not affect the normal conveying of oil gas.
Measure in tank 1 and oil-gas separating plate 2 is set, oil-gas separating plate 2 is distributed with pore (hole diameter 10-20mm, evenly gathers); Measure the top perforate of tank 1, be connected with normally closed oil gas outlet opening electromagnetic valve 7 by oil gas discharge pipe 6, normally closed oil gas outlet opening electromagnetic valve 7 is in normally off, and oil gas discharge pipe 6 other end is communicated with flowline 4.
The course of work is as follows:
● under normal operation, often drive bypass electromagnetic valve 9 and oil-out electromagnetic valve 5 is in normally open, electromagnetic valve of gas circuit 7 is in normally off, and gas mixture is walked from bypass duct, and oil gas is normally carried.
● measuring state
1. close and often drive bypass electromagnetic valve 9, gas mixture enters from oil inlet pipe 3 and measures tank 1, and be sprayed onto in oil-gas separating plate 2, fluid is to dirty, and gas is upwards walked, and realizes being separated of fluid and gas; Open normally closed oil gas outlet opening electromagnetic valve 7, close simultaneously and often output hydraulic fluid port electromagnetic valve 5, the numerical value P0 of record differential pressure pick-up 10, after interval delta T (time), record differential pressure P1, open and often output hydraulic fluid port electromagnetic valve 5, close normally closed oil gas outlet opening electromagnetic valve 7 simultaneously, open and often drive bypass electromagnetic valve 9 (recovery normal operating condition);
2. calculated flow rate F=(P1-P0) * λ/Δ T;
Measure, again from " 1. " if 3. need.
All collections, control and calculating, transmission are completed automatically by the Intelligent control cabinet of well head, and control system adopts the PLC of technical grade to complete control, calculates and transmission.
This invention achieves the Oil-gas Separation of well head and the accurate measurement of fluid flow, according to well head oil flow quantity size, can change oil pumper duty in real time, reach energy-conservation object
As mentioned above, although represented with reference to specific preferred embodiment and described the present invention, it shall not be construed as the restriction to the present invention self.Under the spirit and scope of the present invention prerequisite not departing from claims definition, various change can be made in the form and details to it.
Claims (4)
1. a production wellhead fluid flow on-line measurement device, it is characterized in that, comprise and measure tank (1), oil-gas separating plate (2), oil inlet pipe (3), flowline (4), often output hydraulic fluid port electromagnetic valve (5), oil gas discharge pipe (6), normally closed oil gas outlet opening electromagnetic valve (7), bypass duct (8), often drive bypass electromagnetic valve (9) and pressure difference transmitter (10), described bypass duct (8) is arranged often open bypass electromagnetic valve (9) afterwards with the oil inlet pipe be connected successively (3), measure tank (1) flowline (4) branch circuit parallel connection, described oil-gas separating plate (2) is arranged to be measured in tank (1), and will measure tank (1) be separated into measure tank (1) top with measure tank (1) bottom, described oil inlet pipe (3) is communicated to described measurement tank (1) top, extend downward the bottom measuring tank (1) in the tank body that flowline (4) one end penetrates described measurement tank (1) bottom, flowline (4) other end is communicated to the end of described bypass duct (8) after connecting again and often outputing hydraulic fluid port electromagnetic valve (5), the top on described measurement tank (1) top is connected to oil gas discharge pipe (6), be communicated to normally closed oil gas outlet opening electromagnetic valve (7) and be communicated to again the end of bypass duct (8), described pressure difference transmitter (10) one end is arranged on the bottom measuring tank (1) bottom, the other end is arranged on the below measuring tank (1) bottom flowline (4).
2. production wellhead fluid flow on-line measurement device according to claim 1, it is characterized in that, described oil-gas separating plate (2) is obliquely installed, and an end position of close oil inlet pipe (3) is lower than the one end near flowline (4).
3. production wellhead fluid flow on-line measurement device according to claim 1 and 2, it is characterized in that, also comprise PLC, described PLC respectively with often output hydraulic fluid port electromagnetic valve (5), normally closed oil gas outlet opening electromagnetic valve (7), often drive bypass electromagnetic valve (9) and be connected with pressure difference transmitter (10).
4. the control method of the PLC of production wellhead fluid flow on-line measurement device according to claim 3, is characterized in that, comprise the following steps:
1) PLC sends instruction, close and often drive bypass electromagnetic valve (9), often output hydraulic fluid port electromagnetic valve (5), open normally closed oil gas outlet opening electromagnetic valve (7), and read the pressure value P 0 of pressure difference transmitter (10) now;
2) after Δ T time, the pressure value P 1 of pressure difference transmitter (10) is now read;
3) PLC sends instruction, opens and often drives bypass electromagnetic valve (9), often outputs hydraulic fluid port electromagnetic valve (5), close normally closed oil gas outlet opening electromagnetic valve (7);
4) calculated flow rate F=(P1-P0) * λ/Δ T, in formula, λ is through demarcating the coefficient obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510258144.1A CN104847334A (en) | 2015-05-19 | 2015-05-19 | Online measurement device of producing wellhead oil flow and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510258144.1A CN104847334A (en) | 2015-05-19 | 2015-05-19 | Online measurement device of producing wellhead oil flow and control method thereof |
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| CN104847334A true CN104847334A (en) | 2015-08-19 |
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| CN201510258144.1A Pending CN104847334A (en) | 2015-05-19 | 2015-05-19 | Online measurement device of producing wellhead oil flow and control method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106988725A (en) * | 2017-05-15 | 2017-07-28 | 东南大学 | Using the production wellhead fluid flow on-line measurement device of pulling force sensor |
| CN107218027A (en) * | 2017-05-12 | 2017-09-29 | 东南大学 | Production wellhead fluid flow on-line measurement device based on tuning-fork type sensor |
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| US20040007131A1 (en) * | 2002-07-10 | 2004-01-15 | Chitty Gregory H. | Closed loop multiphase underbalanced drilling process |
| CN2651718Y (en) * | 2003-10-30 | 2004-10-27 | 浙江大学 | Automatic metering installation of oil well and oil gas water three-phase flow |
| CN2704028Y (en) * | 2004-05-24 | 2005-06-08 | 胜利油田胜利工程设计咨询有限责任公司 | U-shaped oil well yield automatic metering device |
| CN2704825Y (en) * | 2004-05-31 | 2005-06-15 | 张东 | Meter regulator for oil, vapour and water output |
| CN101144732A (en) * | 2007-10-26 | 2008-03-19 | 卢玖庆 | Three-phase flow automatic measuring method and device for oil, gas and water |
| CN201330602Y (en) * | 2009-01-23 | 2009-10-21 | 卢玖庆 | Device for measuring high viscosity thick oil flow |
| CN203285424U (en) * | 2013-05-17 | 2013-11-13 | 新疆石油勘察设计研究院（有限公司） | Thickened oil single-tank automatic counting device |
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2015
- 2015-05-19 CN CN201510258144.1A patent/CN104847334A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040007131A1 (en) * | 2002-07-10 | 2004-01-15 | Chitty Gregory H. | Closed loop multiphase underbalanced drilling process |
| CN2651718Y (en) * | 2003-10-30 | 2004-10-27 | 浙江大学 | Automatic metering installation of oil well and oil gas water three-phase flow |
| CN2704028Y (en) * | 2004-05-24 | 2005-06-08 | 胜利油田胜利工程设计咨询有限责任公司 | U-shaped oil well yield automatic metering device |
| CN2704825Y (en) * | 2004-05-31 | 2005-06-15 | 张东 | Meter regulator for oil, vapour and water output |
| CN101144732A (en) * | 2007-10-26 | 2008-03-19 | 卢玖庆 | Three-phase flow automatic measuring method and device for oil, gas and water |
| CN201330602Y (en) * | 2009-01-23 | 2009-10-21 | 卢玖庆 | Device for measuring high viscosity thick oil flow |
| CN203285424U (en) * | 2013-05-17 | 2013-11-13 | 新疆石油勘察设计研究院（有限公司） | Thickened oil single-tank automatic counting device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218027A (en) * | 2017-05-12 | 2017-09-29 | 东南大学 | Production wellhead fluid flow on-line measurement device based on tuning-fork type sensor |
| CN106988725A (en) * | 2017-05-15 | 2017-07-28 | 东南大学 | Using the production wellhead fluid flow on-line measurement device of pulling force sensor |
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Application publication date: 20150819 |
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