Gravel-packing tool assembly
US4192375A · kind A · utility
22Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 11, 1978 |
| Grant date | Mar 11, 1980 |
| Priority date | — |
| Expiry date | Dec 11, 1998 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/045
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An improved gravel-packing tool assembly with a baffled stinger pipe for gravel-packing a perforate liner having substantially the same internal diameter as the casing string extending from the perforate liner to the earth surface. A perforate nipple and a swab cup are provided between the check valve and the baffled stinger pipe of the tool assembly to allow drainage of the annulus above the tool assembly through the stinger pipe to thereby avoid swabbing the well as the tool is retrieved from the well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.