Flow control screen assembly having remotely disabled reverse flow control capability
US8485225B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 29, 2011 |
| Grant date | Jul 16, 2013 |
| Priority date | — |
| Expiry date | Mar 12, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86485
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A flow control screen having a flow path between the interior of a base pipe and a filter medium. A valve assembly, including a valve plug, a ball retainer, and a piston body with a collet assembly is disposed within the flow path in an opening of a housing disposed about the base pipe. The collet assembly is radially outwardly constrained by a radially reduced section of the opening in a first position preventing entry of the valve plug therein and radially outwardly unconstrained by the radially reduced section in a second position. Reverse flow is initially prevented as internal differential pressure seats the valve plug on a seat of the opening and causes the piston body to shift to the second position upon reaching a predetermined threshold. Thereafter, external differential pressure causes the valve plug to enter the piston body and contact the ball retainer, thereby allowing reverse flow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.