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. 17, 2019
Filed:
May. 26, 2016
Applicant:
Nabors Industries, Inc., Houston, TX (US);
Inventor:
Steve Deel, Cypress, TX (US);
Assignee:
NABORS INDUSTRIES, INC., Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 19/00 (2006.01); E21B 17/03 (2006.01); E21B 3/02 (2006.01);
U.S. Cl.
CPC ...
E21B 17/03 (2013.01); E21B 3/02 (2013.01); E21B 19/00 (2013.01);
Abstract
A washpipe assembly includes a seal stack including at least one packing ring adapted to seal between a washpipe and the seal housing; a packing spacer ring adapted to maintain spacing between the seal housing and the washpipe, and a guide bushing ring positioned between the packing spacer ring and the washpipe. The guide bushing ring is made from a softer material than the wash pipe such that any contact therebetween will avoid damage to the washpipe. Additionally, the inclusion of the guide bushing ring may allow the packing spacer ring to be offset further from the washpipe than otherwise allowable.