Patent · US Active

Fill up and circulation tool and mudsaver valve

US8141642B2 · kind B2 · utility

38Cited by

69References

29Claims

0Family size

Assignee

Weatherford/Lamb, Inc. · US

Inventors

Delaney Michael Olstad · Silsbee, US
Russell W. Thompson · Hallsville, US
Russell L Morgan · Cypress, US
Jim Hollingsworth · Cypress, US
Doyle Frederic Boutwell, Jr. · Houston, US
Michael Hayes · Belleville, US
Martin Liess · Seelze, DE
John D. Hooker, II · Houma, US

Key dates

Filing date	May 4, 2009
Grant date	Mar 27, 2012
Priority date	—
Expiry date	Jan 22, 2030

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B33/127
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A fill-up and circulation tool includes a mandrel; a packer assembly is disposed around the mandrel; and a valve assembly connected to the mandrel, wherein the valve assembly is configured to selectively control fluid flow into the tool and out of the tool.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.