Submersible pump
US4537257A · kind A · utility
17Cited by
10References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 16, 1984 |
| Grant date | Aug 27, 1985 |
| Priority date | — |
| Expiry date | Mar 16, 2004 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/128
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method and apparatus for using a submersible pump to lift reservoir fluids in a well while having the tubing/casing annulus isolated from the produced fluids. The apparatus allows the submersible pump to be positioned above the annular packoff device. The apparatus comprises an outer shield that encloses the pump and can be attached to the production tubing. The lower end of the shield attaches to a short tubing section that seals with the annular packoff device or a receptacle above the annular packoff device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.