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Technique of feeding flow in static pressure by injection pump of viscoelastic fluid

A fluid injection and viscoelastic technology, which is applied in the production of fluids, wellbore/well components, earth-moving drilling, etc., can solve the problems of high vibration and easy damage to the pump, and achieve sufficient liquid supply, high efficiency, and elimination of mutual interference. Effect

Inactive Publication Date: 2004-03-10
DAQING OILFIELD CO LTD +1
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  • Claims
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Problems solved by technology

[0003] In order to overcome the shortcomings of the existing liquid supply process that easily cause excessive vibration and easily damage the pump, the present invention provides a viscoelastic fluid injection pump hydrostatic liquid supply process. Vibration prolongs the service life of the polymer injection pump

Method used

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  • Technique of feeding flow in static pressure by injection pump of viscoelastic fluid
  • Technique of feeding flow in static pressure by injection pump of viscoelastic fluid

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Embodiment Construction

[0009] The present invention will be further described below in conjunction with accompanying drawing:

[0010] combined with figure 1 As shown, the hydrostatic liquid supply process of the viscoelastic fluid injection pump adopts a large-diameter liquid header 2, so that the liquid flow rate in the header 2 tends to zero. According to the theoretical calculation and experimental data of viscoelastic fluid mechanics, the liquid The difference between the tensile force and the normal stress produced when the header pipe 2 flows into the branch pipe 4 through the hose 6 also tends to zero; and the front end of the header pipe 2 is connected to the open container 1, so that the air bubbles in the liquid can be eliminated, The other end of the tube 2 is connected to the air-collecting bag 3, so that the viscoelastic polymer liquid flows directly from the elevated tank 1 into the manifold 2, without branch pipes, eliminating the tensile force and normal force at the branch pipes, a...

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Abstract

A static-pressure liquid supplying technology for the viscoelastic fluid injecting pump in order to prevent over-vibration features that a trunk with air collector at its end is connected to bottom of high-position tank, and several flexible tubes are used to connect said trunk to polymer injection pumps, so eliminating the mutual interference caused by vibration. Said air collector can regularly release air, so eliminating the influence from air.

Description

Technical field: [0001] The invention relates to oil field tertiary oil recovery injection technology, which belongs to the static pressure liquid supply technology of viscoelastic fluid injection pump. Background technique: [0002] At present, in the tertiary oil recovery process of oilfields, it is necessary to inject 2000--10000 mg / l incoming fluid as a viscoelastic polymer solution (such as partially hydrolyzed polyacrylamide) into the underground for oil displacement after dilution at the injection station, in which the injection pump is supplied with liquid is an important link. Since the polymer aqueous solution is a viscoelastic non-Newtonian fluid, the liquid supply to the plunger pump is significantly different from water or viscous fluid. The current feeding pump to the header diversion method has the following defects: 2000--10000mg / The polymer aqueous solution of L supplies liquid to the injection pump through a transfer pump. Since the incoming liquid pipeli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/22
Inventor 王德民徐德刚宗大庆王树伦孙茂盛蒋新
Owner DAQING OILFIELD CO LTD
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