Upward movement only actuated gravel pack system
US4858690A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 1988 |
| Grant date | Aug 22, 1989 |
| Priority date | — |
| Expiry date | Jul 27, 2008 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/045
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The gravel pack system includes a crossover assembly disposed within a screen assembly which has been adapted for disposal adjacent a producing formation within a well. The screen assembly includes a packet for sealing the annulus between the screen assembly and a well casing and a production screen disposed below the packer. The crossover assembly includes a wash pipe and a crossover tool adapted for suspension within the well on a pipe string for disposal within the screen assembly. Upon the disposal of the crossover assembly within the screen assembly, the assemblies together form an upper crossover valve, a lower crossover valve, a circulation valve, and a screen valve. These valves are selectively opened and closed for the various gravel pack operations by raising the crossover assembly within the screen assembly. The screen assembly and crossover assembly include a plurality of interference collars and collets whereby the crossover assembly is raised within the screen assembly to predetermined and positively indicated positions for carrying out the individual operations of the gravel pack.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.