Plunger enhanced chamber lift for well installations
US6966366B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 1, 2004 |
| Grant date | Nov 22, 2005 |
| Priority date | — |
| Expiry date | Sep 1, 2024 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/129
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention is addressed to a method of retro-fitting a well installation to reconfigure it to provide plunger enhanced chamber lift. The method comprises the steps of providing a reel-carried supply of coil tubing, a primary seating nipple assembly, a primary seal assembly, a primary seal, a receiver housing, and a secondary seating nipple. The receiver housing is connected with the coil tubing, and the coiling tube snubbed until the primary seal engages the primary seating nipple. A wire installable and retrievable sealing plug is provided and installed within the receiver housing. The wellhead is modified to supply gas under pressure into the secondary annulus and the sealing plug is removed. A check valve assembly is provided and positioned within the coiling tube such that the secondary seal engages the secondary seating nipple. A reciprocally moveable plunger is provided and installed within the coiling tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.