Method and apparatus for gravel packing a well
US4635725A · kind A · utility
30Cited by
6References
13Claims
0Family size
Inventor
Key dates
| Filing date | Dec 10, 1984 |
| Grant date | Jan 13, 1987 |
| Priority date | — |
| Expiry date | Dec 10, 2004 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/04
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Method and apparatus for gravel packing a perforate liner (12) in a well including a wash pipe (34) carried by a cross-over tool (30) which has a pair of fluid passages (38-40) through which the flow of fluid may be reversed. The wash pipe (34) is mounted in a floating relation within the liner (12) for vertical relative movement and a double acting piston (62) mounted between the liner (12) and wash pipe (34) is responsive to fluid pressure within the liner (12) for moving the wash pipe (34) vertically relative to the liner (12).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.