CN104453813A - Device for controlling foaming agent filling through capillary tube one-way valves and method thereof - Google Patents

Device for controlling foaming agent filling through capillary tube one-way valves and method thereof Download PDF

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Publication number
CN104453813A
CN104453813A CN201410662076.0A CN201410662076A CN104453813A CN 104453813 A CN104453813 A CN 104453813A CN 201410662076 A CN201410662076 A CN 201410662076A CN 104453813 A CN104453813 A CN 104453813A
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CN
China
Prior art keywords
capillary tube
way valve
check valve
gas
pressure
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Granted
Application number
CN201410662076.0A
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Chinese (zh)
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CN104453813B (en
Inventor
冯朋鑫
黄斌
傅程
宋考平
刘进祥
张伟文
杨兴宙
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Northeast Petroleum University
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Northeast Petroleum University
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Publication of CN104453813A publication Critical patent/CN104453813A/en
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Classifications

    • 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
    • E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
    • 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
    • E21B34/00—Valve arrangements for boreholes or wells
    • E21B34/06—Valve arrangements for boreholes or wells in wells
    • E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
    • 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
    • E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
    • E21B2200/05—Flapper valves

Abstract

The invention relates to a device for controlling foaming agent filling through capillary tube one-way valves and a method of the device. The device for controlling foaming agent filling through the capillary tube one-way valve comprises a capillary tube, the underground one-way valve, a liquid storage tank, the gas control one-way valve, a controller and a pressure sensor. The liquid storage tank is connected to an oil jacket annulus of a gas well opening device through a pipeline, the gas control one-way valve is arranged on the pipeline, and the capillary tube is hung in the oil jacket annulus. The lower end of the capillary tube abuts against the lower middle portion of a gas well gas layer, and the lower end of the capillary tube is provided with the underground one-way valve. The pressure sensor is arranged in the oil jacket annulus and connected with the controller, the controller is connected with the gas control one-way valve, and a display device of the controller is arranged on an instrument panel arranged on the liquid storage tank. According to the device and the method, the capillary tube is connected with the underground one-way valve to control the filling opportunity and the filling amount of a foaming agent, accumulated liquid is drained, and the purpose of continuous production of a gas well is achieved.

Description

One utilizes capillary tube one way valve to control frother filling apparatus and method thereof
Technical field
The present invention relates to gas field development field, particularly a kind of method utilizing one way valve automatically to control frother filling, be applicable to the hydrops gas well of oil pipe, casing annulus connection, be specifically related to one and utilize capillary tube one way valve to control frother filling apparatus and method.
Background technology
There is hydrops in Wellbore of Gas Wells, affects it undoubtedly and normally produce, pollute gas-bearing formation simultaneously, reduce gas well deliverability further.Therefore, in gas well liquid loading process, discharge hydrops in time, guarantee gas well continuous seepage ability, most important.At present, water pumping gas production method is numerous, the mainly foam drainage gas recovery be most widely used.Reason is that foam drainage gas recovery technological operation is simple and convenient, with low cost, effect of increasing production is obvious.
Foam drainage gas recovery technique implements various ways realizations such as arranging car infusion mainly through bubble, compensator instils, bubble rod row/ball is regularly thrown in automatically at the scene.These measures all need artificially to judge shaft bottom hydrops amount, and estimation foam discharging agent adding amount, the filling interval etc. of setting foam discharging agent/rod/ball, exists certainty scarcely, filling opportunity and adding amount exist certain blindness.
Summary of the invention
The object of this invention is to provide one utilizes capillary tube one way valve to control frother filling apparatus, this capillary tube one way valve that utilizes controls frother filling apparatus for solving problem Wellbore of Gas Wells frother filling opportunity and adding amount existing certain blindness, and another object of the present invention is to provide this method utilizing capillary tube one way valve to control frother filling apparatus.
The technical solution adopted for the present invention to solve the technical problems is: this capillary tube one way valve control frother filling apparatus that utilizes comprises capillary tube, downhole check valve, fluid reservoir, gas control one way valve, controller, pressure sensor, fluid reservoir is connected to the oil jacket annular space of gas well mouth device by pipeline, this pipeline is arranged gas control one way valve, capillary tube is hung in oil jacket annular space, gas well gas-bearing formation middle and lower part is arrived in the lower end of capillary tube, and a downhole check valve is installed in capillary tube lower end; Setting pressure sensor in oil jacket annular space, pressure sensor connection control device, controller connects gas control one way valve, and the display unit of controller is arranged on instrument board that fluid reservoir is arranged.
The above-mentioned capillary tube one way valve that utilizes controls frother filling apparatus control frother charging method:
In gas well liquid loading process, downhole check valve two-way pressure balances, downhole check valve is in long off status, start hydrops bottom gas well after, base pressure increases gradually, after hydrops height reaches some values, downhole check valve low pressure and after pressure difference value is greater than the setting pressure of downhole check valve above it, downhole check valve is opened, pressure sensor sends pressure signal now to controller simultaneously, controller controls gas control one way valve and opens, the foaming dosage of setting is filled into bottom gas well oil jacket annular space by capillary tube by fluid reservoir automatically, adding amount reaches gas control closed check valve after setting value, well head is carried out by gas after hydrops and frother react, below downhole check valve, pressure reduces, maintain an equal level with top pressure gradually, downhole check valve is closed immediately.
The present invention has following beneficial effect:
The present invention utilizes capillary tube connecting downhole one way valve to control filling opportunity and the adding amount of foam discharging agent, adding amount is after calculated in advance and sets, one-way on-off valve is under the effect of liquid-column height additonal pressure, thus control filling opportunity and the adding amount of foam discharging agent, discharge hydrops and realize gas well quantity-produced object.
Accompanying drawing explanation
Fig. 1 is connection diagram of the present invention.
In figure: 1. capillary tube, 2. downhole check valve, 3. fluid reservoir, 4. gas control one way valve, 5. oil jacket annular space, 6. gas well mouth device, 7. instrument board.
Detailed description of the invention
The present invention is further illustrated below:
As shown in Figure 1, this capillary tube one way valve control frother filling apparatus that utilizes comprises capillary tube 1, downhole check valve 2, fluid reservoir 3, gas control one way valve 4, controller, pressure sensor, fluid reservoir 3 is connected to the oil jacket annular space 5 of gas well mouth device 6 by pipeline, this pipeline is arranged gas control one way valve 4, capillary tube 1 is hung in oil jacket annular space 5, gas well gas-bearing formation middle and lower part is arrived in the lower end of capillary tube 1, a downhole check valve 2 is installed in capillary tube 1 lower end, downhole check valve 2 is automatic switch under certain pressure condition, frother is injected into shaft bottom by capillary tube 1, realize frother filling, setting pressure sensor in oil jacket annular space 5, pressure sensor is arranged near downhole check valve place, the installation of pressure sensor adopts known technology to complete, pressure sensor connection control device, controller connects gas control one way valve 4, and the display unit of controller is arranged on the instrument board 7 of setting on fluid reservoir 3, realize setting and the display of filling opportunity and adding amount, fluid reservoir 3 stores a large amount of frother, and gas control one way valve 4 realizes fluid reservoir 3 automatic switch, and frother flows out fluid reservoir 3.Gas control one way valve 4 also can select other automatic control one way valve.
The above-mentioned capillary tube one way valve that utilizes controls frother filling apparatus control frother charging method:
In gas well liquid loading process, downhole check valve 2 two-way pressure balances, downhole check valve 2 is in long off status, start hydrops bottom gas well after, base pressure increases gradually, after hydrops height reaches some values, downhole check valve 2 low pressure and after pressure difference value is greater than the setting pressure of downhole check valve 2 above it, downhole check valve 2 is opened, pressure sensor sends pressure signal now to controller simultaneously, controller controls gas control one way valve 4 and opens, the foaming dosage of setting is filled into bottom gas well oil jacket annular space 5 by capillary tube 1 by fluid reservoir 3 automatically, after adding amount reaches setting value, gas control one way valve 4 is closed, well head is carried out by gas after hydrops and frother react, below downhole check valve 2, pressure reduces, maintain an equal level with top pressure gradually, downhole check valve 2 is closed immediately.
1) frother is annotated opportunity:
（1）
Wherein, P1---pressure above one way valve;
P2---pressure below one way valve;
---wellbore fluid density;
---liquid height in pit shaft.
2) frother adding amount is determined according to hydrops height.
Downhole check valve 2 opening pressure is known, operating personnel calculate hydrops height, hydrops amount according to formula (1), can calculate required frother adding amount according to the proportion relation of this frother of filling and hydrops, these can determine and show on the instrument board 7 of fluid reservoir 3.
The original state of not hydrops in gas well: above downhole check valve 2, pressure P 1 maintains an equal level with below pressure P 2, and downhole check valve 2 is in closed condition.
Gas well starts hydrops: hydrops height increases gradually, below downhole check valve, pressure P 2 increases gradually, top pressure P 1 is constant, P2-P1 pressure reduction increases gradually, after increasing to a certain amount of (downhole check valve setting pressure), downhole check valve is opened, and gas control one way valve 4 is opened, and enough frothers that fluid reservoir instrument calculates setting to flow through after downhole check valve 2 at the bottom of Injection Well along with the capillary tube 1 in oil jacket annular space.
End-state in gas well after hydrops discharge: hydrops and frother generation chemical reaction, produce a large amount of foam, reduce fluid density, taken out of well head thereupon by gas.After in gas well, hydrops is discharged, below downhole check valve, pressure P 2 is reduced to and maintains an equal level with top pressure P 1, and downhole check valve 2 is closed.
The present invention is secret to test as follows:
Gas well analysis, optimization are obtained by technician if downhole check valve opening pressure is 6MPa(one way valve opening pressure), then hydrops height set is 500m, and shaft bottom hydrops is about 4m 3.This frother and hydrops proportioning are 1:10, then need filling frother to be defined as 0.4m 3, instrument board shows the frother 0.4m that need annotate 3, i.e. 400L.Downhole check valve 2 is opened, and gas control one way valve 4 is opened, and frother slowly injects in oil jacket annular space.After adding amount to 400L, gas control one way valve 4 is closed, and downhole check valve 2 is closed.

Claims (2)

1. one kind utilizes capillary tube one way valve to control frother filling apparatus, it is characterized in that: this capillary tube one way valve control frother filling apparatus that utilizes comprises capillary tube (1), downhole check valve (2), fluid reservoir (3), gas control one way valve (4), controller, pressure sensor, fluid reservoir (3) is connected to the oil jacket annular space (5) of gas well mouth device (6) by pipeline, this pipeline is arranged gas control one way valve (4), capillary tube (1) is hung in oil jacket annular space (5), gas well gas-bearing formation middle and lower part is arrived in the lower end of capillary tube (1), a downhole check valve (2) is installed in capillary tube (1) lower end, the interior setting pressure sensor of oil jacket annular space (5), pressure sensor connection control device, controller connects gas control one way valve (4), and the display unit of controller is arranged on the upper instrument board (7) arranged of fluid reservoir (3).
2. the charging method utilizing capillary tube one way valve to control frother filling apparatus according to claim 1, it is characterized in that: in gas well liquid loading process, downhole check valve (2) two-way pressure balances, downhole check valve (2) is in long off status, start hydrops bottom gas well after, base pressure increases gradually, after hydrops height reaches some values, downhole check valve (2) low pressure and after pressure difference value is greater than the setting pressure of downhole check valve (2) above it, downhole check valve (2) is opened, pressure sensor sends pressure signal now to controller simultaneously, controller controls gas control one way valve (4) and opens, the foaming dosage of setting is filled into gas well oil jacket annular space (5) bottom by capillary tube (1) by fluid reservoir (3) automatically, after adding amount reaches setting value, gas control one way valve (4) is closed, well head is carried out by gas after hydrops and frother react, downhole check valve (2) below pressure reduces, maintain an equal level with downhole check valve (2) top pressure gradually, downhole check valve (2) is closed immediately.
CN201410662076.0A 2014-11-19 2014-11-19 One kind controls foaming agent filling apparatus and its method using capillary tube check valve Active CN104453813B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105134150A (en) * 2015-10-21 2015-12-09 中国石油化工股份有限公司 Automatic filling system for gas well defoamer
CN109555508A (en) * 2017-09-26 2019-04-02 中国石油化工股份有限公司 A kind of foam discharging agent filling apparatus and its application method
CN110197040A (en) * 2019-06-06 2019-09-03 东北石油大学 A kind of annular pressure calculation method based on Reynolds number
CN113006753A (en) * 2021-05-08 2021-06-22 中国石油天然气股份有限公司 Method and equipment for filling foam drainage agent and foam drainage ball for equipment

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080236815A1 (en) * 2005-05-02 2008-10-02 Shane Hinds Method and apparatus for continous downhole fluid release and well evaluation
CN201202446Y (en) * 2008-04-29 2009-03-04 中国海洋石油总公司 Prying type capillary steel tube liquor drainage gas production apparatus
US20090277643A1 (en) * 2005-06-08 2009-11-12 Maximiliano Mondelli Method and apparatus for continuously injecting fluid in a wellbore while maintaining safety valve operation
CN201517413U (en) * 2009-10-13 2010-06-30 中国石油天然气股份有限公司 Gas well remote control automatic medicine adding device
CN201705319U (en) * 2010-06-21 2011-01-12 中国石油天然气股份有限公司 Skid-mounted closed dosing device
CN202673264U (en) * 2012-07-02 2013-01-16 许双龙 Downhole automatic chemical dosing device for oil well

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080236815A1 (en) * 2005-05-02 2008-10-02 Shane Hinds Method and apparatus for continous downhole fluid release and well evaluation
US20090277643A1 (en) * 2005-06-08 2009-11-12 Maximiliano Mondelli Method and apparatus for continuously injecting fluid in a wellbore while maintaining safety valve operation
CN201202446Y (en) * 2008-04-29 2009-03-04 中国海洋石油总公司 Prying type capillary steel tube liquor drainage gas production apparatus
CN201517413U (en) * 2009-10-13 2010-06-30 中国石油天然气股份有限公司 Gas well remote control automatic medicine adding device
CN201705319U (en) * 2010-06-21 2011-01-12 中国石油天然气股份有限公司 Skid-mounted closed dosing device
CN202673264U (en) * 2012-07-02 2013-01-16 许双龙 Downhole automatic chemical dosing device for oil well

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105134150A (en) * 2015-10-21 2015-12-09 中国石油化工股份有限公司 Automatic filling system for gas well defoamer
CN109555508A (en) * 2017-09-26 2019-04-02 中国石油化工股份有限公司 A kind of foam discharging agent filling apparatus and its application method
CN110197040A (en) * 2019-06-06 2019-09-03 东北石油大学 A kind of annular pressure calculation method based on Reynolds number
CN110197040B (en) * 2019-06-06 2023-04-07 东北石油大学 Reynolds number-based annular pressure calculation method
CN113006753A (en) * 2021-05-08 2021-06-22 中国石油天然气股份有限公司 Method and equipment for filling foam drainage agent and foam drainage ball for equipment

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Inventor after: Huang Bin

Inventor after: Feng Pengxin

Inventor after: Fu Cheng

Inventor after: Song Kaoping

Inventor after: Zhang Weiwen

Inventor after: Yang Xingzhou

Inventor before: Feng Pengxin

Inventor before: Huang Bin

Inventor before: Fu Cheng

Inventor before: Song Kaoping

Inventor before: Liu Jinxiang

Inventor before: Zhang Weiwen

Inventor before: Yang Xingzhou

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