Method and apparatus for gravel packing a zone in a well
US4418754A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 2, 1981 |
| Grant date | Dec 6, 1983 |
| Priority date | — |
| Expiry date | Dec 2, 2001 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/045
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Apparatus adapted to be lowered on a tubing string for setting a gravel pack at the bottom of a well. Conduits provide a gravel-slurry flow path from the bottom of the tubing to a screen which is suspended from a housing at the lower end of the conduits. A packer is provided between the tubing and the housing for sealing the well bore during gravel packing. When the screen hits the bottom of the well, a clutch connected between the housing and the conduit disengages to prevent transmission of tubing movement to the screen during the gravel packing process. Upon packing completion, tubing string rotation releases the screen to permit raising of the apparatus on the tubing string.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.