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:
Aug. 10, 2021
Filed:
Apr. 13, 2018
Applicant:
Weatherford U.k. Limited, Loughborough, GB;
Inventor:
Graeme Foubister, Ellon, GB;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 29/00 (2006.01);
U.S. Cl.
CPC ...
E21B 29/005 (2013.01);
Abstract
A knife for performing a downhole cutting operation includes two spaced-apart blades positioned respectively at a trailing side and leading side of the knife. The blade at the trailing side defines a first cutting element of the knife and the blade at the leading side defines a second cutting element of the knife. The first cutting element extends to a radially outermost position of the knife such that the first cutting element initially cuts a downhole casing during the initial cutting operation of the knife. The second cutting element is not involved in the cutting of the casing during the initial cutting operation.