Sand control screen assembly having remotely disabled reverse flow control capability
US8256522B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 15, 2010 |
| Grant date | Sep 4, 2012 |
| Priority date | — |
| Expiry date | May 12, 2031 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B34/142
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A flow control screen having a fluid flow path between a perforated section of a base pipe and a filter medium positioned around a blank pipe section of the base pipe. A valve assembly, including a piston body and a valve plug, is disposed within the fluid flow path. The piston body has an internal seat and a collet assembly that is radially outwardly constrained in a first operating position of the piston body to retain the valve plug therein and radially outwardly unconstrained in a second operating position of the piston body. Reverse flow is initially prevented as an internal differential pressure seats the valve plug on the internal seat and causes the piston body to shift to the second operating position upon reaching a predetermined threshold. Thereafter, an external differential pressure causes the valve plug to be expelled through the collet assembly, thereby no longer preventing reverse flow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.