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:
Jan. 11, 2022
Filed:
Sep. 28, 2018
Applicant:
Weatherford U.k. Limited, Leicestershire, GB;
Inventor:
Michael John Maclurg, Aberdeenshire, GB;
Assignee:
Weatherford U.K. Limited, Leicestershire, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 34/14 (2006.01); E21B 33/129 (2006.01); E21B 34/10 (2006.01); E21B 33/14 (2006.01); E21B 23/04 (2006.01);
U.S. Cl.
CPC ...
E21B 34/142 (2020.05); E21B 33/1294 (2013.01); E21B 33/146 (2013.01); E21B 34/10 (2013.01); E21B 34/14 (2013.01); E21B 23/0413 (2020.05); E21B 2200/04 (2020.05); E21B 2200/06 (2020.05);
Abstract
A downhole apparatus comprises a housing, a seat mounted in the housing and configured to receive an object such that the object may engage and axially move the seat to operate the downhole apparatus, and a moveable barrier located on one axial side of the seat such that when an object is engaged with the seat a volume is defined between the object and the moveable barrier, wherein the moveable barrier permits said volume to be moved within the apparatus to allow the object to axially move the seat.