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Title:
NOVEL PRESSURIZED WATER INJECTION DEVICE FOR SCREW PUMP
Document Type and Number:
WIPO Patent Application WO/2020/093894
Kind Code:
A1
Abstract:
A pressurized water injection device for a screw pump, comprising an electric motor (4) and a screw pump (16). The electric motor (4) is electrically connected to a controller, and is connected to the screw pump (16) by means of a flexible connection device. A motor shaft (7) is provided with positive and negative thrust bearings (5, 6) or a double-direction thrust bearing. A mechanical seal (12) is disposed on the motor shaft (7). A sealing compartment (8) is provided with a pressure balance device. The device supports a relay booster pump. The water can be fed without decreasing the pressure, and the high pressure feedwater is supported. On this basis, pressurization is carried out again by means of the screw pump so that the water of higher pressure is obtained and injected into the ground without damaging the electric motor.

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Inventors:
LI DEYIN (CN)
Application Number:
PCT/CN2019/113616
Publication Date:
May 14, 2020
Filing Date:
October 28, 2019
Export Citation:
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Assignee:
XINXIANG XIAFENG ELECTRIC LTC (CN)
International Classes:
F04C2/107; E21B43/20; F04C11/00
Foreign References:
CN109139455A2019-01-04
CN204386570U2015-06-10
CN201461429U2010-05-12
CN202628585U2012-12-26
US20040035585A12004-02-26
Attorney, Agent or Firm:
BEIJING YUANFENGLAWFIRM (CN)
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