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:
Mar. 13, 2018
Filed:
Oct. 08, 2014
Applicant:
Weatherford Technology Holdings, Llc, Houston, TX (US);
Inventor:
Jeffery Morrison, Missouri City, TX (US);
Assignee:
Weatherford Technology Holdings, LLC, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 33/14 (2006.01); E21B 34/10 (2006.01); E21B 34/14 (2006.01); E21B 21/10 (2006.01);
U.S. Cl.
CPC ...
E21B 33/14 (2013.01); E21B 21/10 (2013.01); E21B 34/10 (2013.01); E21B 34/14 (2013.01);
Abstract
A valve includes a housing having a bore. The valve further includes a piston member movable between a first position permitting fluid passage through the bore and a second position obstructing the bore through the housing. Additionally, the valve includes a biasing member configured to bias the piston member toward the second position. A method of using a valve in a cementing operation is provided.