Method and related apparatus for retrieving a rotary pump from a wellbore
US5871051A · kind A · utility
44Cited by
5References
44Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 17, 1997 |
| Grant date | Feb 16, 1999 |
| Priority date | — |
| Expiry date | Jan 17, 2017 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/121
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method and related apparatus for the retrieval of a rotary pump from a wellbore while leaving the pump's drive mechanism within the wellbore, comprises lowering a latch mechanism into a wellbore by a cable or coiled tubing and connecting the latch mechanism to the rotary pump suspended within the wellbore. Holding mechanisms, which removably connect the rotary pump to the pump's drive mechanism, are disengaged by pulling of the cable or coiled tubing, or by the application of hydraulic pressure. The latch mechanism and the pump are then retrieved from the wellbore, while the drive mechanism remains suspended within the wellbore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.