Title:
CRUDE OIL MINING PUMP
Document Type and Number:
WIPO Patent Application WO/2022/176092
Kind Code:
A1
Abstract:
This crude oil mining pump comprises: a production pipe forming a tubular shape conforming to the axis extending in the up-down direction; a pump rotor extending in the axial direction in the production pipe; and a pump stator surrounding the pump rotor. The pump rotor has: a pump shaft; and an impeller that is provided with a plurality of stages and pumps crude oil upward by being rotated together with the pump shaft. The pump stator has: a stator body forming a tubular shape; a plurality of vanes protruding radially inward from the inner peripheral surface of the stator body and provided above each stage of the impeller; a diffuser hub provided on the radially inner side of the vanes; a bearing device provided on the inner periphery side of the diffuser hub; and a hub extension portion that is provided to an upper end portion of the diffuser hub and has an outer peripheral surface having a fixed outer diameter about the axis.
Inventors:
MITSUDA KIMIHIKO (JP)
SASAKI SHUHEI (JP)
SASAKI SHUHEI (JP)
Application Number:
PCT/JP2021/006058
Publication Date:
August 25, 2022
Filing Date:
February 18, 2021
Export Citation:
Assignee:
MITSUBISHI HEAVY IND LTD (JP)
International Classes:
F04D13/08; F04D13/10
Domestic Patent References:
| WO2003098049A1 | 2003-11-27 |
Foreign References:
| US20150132159A1 | 2015-05-14 | |||
| JP2020197149A | 2020-12-10 | |||
| JP2003056481A | 2003-02-26 | |||
| JPH0738675U | 1995-07-14 | |||
| US4553909A | 1985-11-19 | |||
| US3288075A | 1966-11-29 |
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
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