Fluid loss control system for gravel pack assembly
US5335727A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1992 |
| Grant date | Aug 9, 1994 |
| Priority date | — |
| Expiry date | Nov 4, 2012 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/04
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An auger gravel pack assembly for installation in a gravel packed well includes a fluid loss control closure member retained in a body disposed in a tubing assembly or "work string" between the gravel pack screen and a running tool and cup-packer assembly. A ball-type closure member is retained by releasable fingers connected to a piston which is responsive to fluid pressure applied through the work string to effect release of the closure ball to engage a seat and substantially prevent flow of fluid from the work string or the wellbore annulus into and through the gravel pack screen after installation of the screen into the gravel pack. Ports in the assembly above the closure member allow fluid to flow between the wellbore annulus and the work string to prevent pressure buildup between the gravel pack and the cup-packer during installation of the screen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.