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. 28, 2020
Filed:
Feb. 14, 2018
Applicant:
Frac Technology As, Ytre Arna, NO;
Inventors:
Viggo Brandsdal, Ytre Arna, NO;
Geir Valestrand Aasheim, Ytre Arna, NO;
Assignee:
FRAC Technology AS, , NO;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 34/06 (2006.01); E21B 34/10 (2006.01); E21B 34/00 (2006.01); E21B 43/26 (2006.01);
U.S. Cl.
CPC ...
E21B 34/063 (2013.01); E21B 34/10 (2013.01); E21B 43/26 (2013.01); E21B 2034/007 (2013.01);
Abstract
A downhole valve has a housing with a longitudinal main passage and at least one valve port extending from the main passage and through the housing, a valve member is arranged in the main passage, the valve member arranged to cover the at least one valve port, wherein at least a part of the valve member is made of a degradable material which is reactive to water or a well fluid, and has a surface coating of a material which is non-reactive to water or the well fluid.