Coal bed gas multi-machine linkage hydraulic drive discharge and recovery process system
A multi-machine linkage, process system technology, applied in machine/engine, production fluid, earthwork drilling and other directions, can solve problems such as small parameter adjustment range, short workover cycle, eccentric rod and tube wear, etc., to avoid separation treatment, The effect of reducing drainage cost and improving operation efficiency
Inactive Publication Date: 2017-08-29
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology
However, the three-pump drainage system mainly used in my country's coalbed methane field generally has problems such as large investment, unsuitable equipment selection, serious partial wear of rods and pipes, stuck pumps, buried pumps, etc., resulting in short workover periods and seriously affecting the coal seam. The normal drainage of gas wells directly reduces the investment benefits of coalbed methane
In addition, on the coalbed methane development well site platform in my country, multiple wells are often combined for drainage. It is inconvenient to adjust the parameters of the three-pump drainage system and the range of parameter adjustment is small
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[0025] The technical solution of the present invention is not limited to the specific implementation manners listed, but also includes any combination of the implementation manners.
[0026] as attached Figure 1 to Figure 3 , The coalbed methane multi-machine linkage hydraulic drive drainage process system includes: surface hydraulic pump station 1, power fluid transmission control system 2, downhole oil pump unit 3 and oil pipe 4. The surface hydraulic pump station 1 is the power source of the whole system, which transports the power fluid to the downhole oil pump unit 3 through the power fluid transmission control system 2, and drives the downhole oil pump unit 3 to complete the drainage of well fluid and reduce the bottom hole pressure. To realize the recovery of coalbed methane, the downhole oil well pump unit 3 is integrally fixed in the oil pipe 4, and the downhole oil well pump unit 3 can be pulled out without the oil pipe 4 during the pump inspection and workover oper...
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The invention discloses a coal bed gas multi-machine linkage hydraulic drive discharge and recovery process system and belongs to the field of coal bed gas exploitation. The coal bed gas multi-machine linkage hydraulic drive discharge and recovery process system comprises a ground hydraulic pump station, a power liquid conveying control system and a downhole oil well pump unit. The ground hydraulic pump station conveys power liquid to the downhole oil well pump unit through the power liquid conveying control system. The downhole oil well pump unit is driven to work so as to complete discharge and recovery of well liquid, reduce the pressure of a well bottom and achieve recovery of coal bed gas. The hydraulic drive rodless discharge and recovery system is adopted, the problem of uneven abrasion of three-pumping discharge and recovery system rod pipes is solved fundamentally, and the advantages that parameter adjusting is convenient and the parameter adjusting range is large are achieved; multi-machine linkage on the same platform can be achieved, multiple machines does not interfere with one another, and the discharge and recovery cost is reduced greatly; the power liquid circulation mode adopts closed-type circulation, the power liquid and production liquid of a coal bed gas well are not mixed but return to the ground through respective channels; and the failure rate of the hydraulic system due to power liquid pollution is decreased, and the system efficiency is improved.
Description
technical field [0001] The invention belongs to the field of coal-bed methane exploitation, and in particular relates to a coal-bed methane multi-machine linkage hydraulic drive drainage process system. Background technique [0002] Coalbed methane is a kind of unconventional natural gas generated from coal seams and stored in coal seams mainly in the state of adsorption, and its main component is methane. Coalbed methane drainage is also called drainage gas recovery. Water is discharged from the coalbed methane well through artificial lifting method, so that the pressure of the coal reservoir is reduced below the critical desorption pressure value of the coalbed methane, so that the adsorbed methane is desorbed into a large amount of free methane and transported to the wellhead. [0003] For a long time, my country's coalbed methane development has not formed its own theoretical system, and the conventional oil and gas extraction equipment has been transplanted, mainly bas...
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IPC IPC(8): E21B43/00F04B47/08
CPCE21B43/006E21B43/129F04B47/08
Inventor 王旱祥兰文剑张立军刘延鑫杜开拓石郑健
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)