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:
Sep. 12, 2023
Filed:
Feb. 15, 2019
Applicant:
Weatherford U.k. Limited, Loughborough, GB;
Inventors:
Derrick Docherty, Loughborough, GB;
Stephen Reid, Loughborough, GB;
Assignee:
Weatherford U.K. Limited, Leicestershire, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 34/08 (2006.01); E21B 34/10 (2006.01); E21B 34/14 (2006.01); E21B 23/04 (2006.01); E21B 23/06 (2006.01);
U.S. Cl.
CPC ...
E21B 34/08 (2013.01); E21B 23/04 (2013.01); E21B 23/06 (2013.01); E21B 34/102 (2013.01); E21B 34/14 (2013.01); E21B 2200/06 (2020.05);
Abstract
Downhole apparatus is provided for location in a fluid-filled bore, such as a well bore. The apparatus comprises a tubular body comprising a plurality of cylindrical chambers for containing a compressible substance, and pistons mounted in the chambers. A lock arrangement is provided and has a locking configuration for retaining the pistons in the chambers and an unlocked configuration in which bore fluid pressure may translate the pistons through the chambers.