Patent · US Active

Displaceable plug in a tool string filter

US8028768B2 · kind B2 · utility

4Cited by

38References

14Claims

0Family size

Assignee

SCHLUMBERGER TECHNOLOGY CORPORATION · US

Inventors

David R. Hall · Provo, US
Paula Turner · Pleasant Grove, US
David Lundgreen · Spanish Fork, US

Key dates

Filing date	Mar 17, 2009
Grant date	Oct 4, 2011
Priority date	—
Expiry date	Jul 30, 2029

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B27/005
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A filter for a drill string comprises a perforated receptacle having an upper end and a lower end. The upper end of the filter comprises a drilling mud intake, and the lower end of the filter comprises an opening. A displaceable plug is seated on the opening at the lower end.

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