Downhole pump installation/removal system and method
US6050340A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 27, 1998 |
| Grant date | Apr 18, 2000 |
| Priority date | — |
| Expiry date | Mar 27, 2018 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B23/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Installation/removal assembly and method are disclosed that reduce forces required for installing and removing from a wellbore hydraulic artificial lift installations, such as, for example, hydraulic reciprocating pumps, hydraulic jet pumps, coil tubing hydraulic jet pumps, and other hydraulically operated installations. The installation/removal assembly is provided with a hydraulically activated latch and spear assembly that, in a preferred embodiment, includes no radially extending latch elements for securing a bottomhole assembly to a reservoir connection, such as a seating nipple designed for use with mechanical latches. A bottomhole assembly is provided with relatively moveable inner and outer members that move between closed and open positions for respectively sealing or equalizing, differential pressure across a one-way valve that arises when the pump is turned off. The pressure above the one-way valve may be the same as the annulus pressure between the production tubing and the bottomhole assembly of the hydraulic artificial lift installation. External communication embodiments of the present invention communicate directly to the annulus between the production tubing and th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.