The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 04, 2011
Filed:
Mar. 17, 2009
Applicants:
David R. Hall, Provo, UT (US);
Paula Turner, Pleasant Grove, UT (US);
David Lundgreen, Provo, UT (US);
Inventors:
David R. Hall, Provo, UT (US);
Paula Turner, Pleasant Grove, UT (US);
David Lundgreen, Provo, UT (US);
Assignee:
Schlumberger Technology Corporation, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 43/08 (2006.01); E03B 3/18 (2006.01);
U.S. Cl.
CPC ...
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.