Method and apparatus to isolate a wellbore during pump workover
US7219743B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 1, 2004 |
| Grant date | May 22, 2007 |
| Priority date | — |
| Expiry date | Mar 23, 2025 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B34/107
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A system and method for actuating a shut-off valve in a wellbore wherein the shut-off valve element can be positively closed before the pump is removed from the well. A hydraulic actuator component is operably associated with the shut-off valve to provide for selective isolation of the well by positive closing of the valve prior to removal of the pump and opening of the valve after replacement of a pump within the wellbore. The hydraulic actuator component has a balanced hydraulic design wherein the valve closure element may be moved toward an open or closed position by flow of hydraulic fluid through first and second hydraulic lines. When a repaired pump or replacement pump is placed into the well, the actuator is stabbed into a packer element to seat it. The hydraulic actuator assembly is then operated to open the shut-off valve, thereby reestablishing well operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.