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. 16, 2022
Filed:
Sep. 09, 2020
Applicant:
Deublin Company, Llc, Waukegan, IL (US);
Inventors:
Paul Mario Masini, Mount Prospect, IL (US);
Mark Gerard Pospisil, Park Ridge, IL (US);
Assignee:
Deublin Company, LLC, Waukegan, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 21/01 (2006.01); F16L 27/08 (2006.01);
U.S. Cl.
CPC ...
E21B 21/01 (2013.01); F16L 27/0808 (2013.01);
Abstract
A washpipe seal and method includes providing a first sliding mechanical face seal between two seal elements to seal a mud conduit, and a second mechanical face seal between two additional seal elements to define a cavity within a housing of the washpipe between the first and second mechanical face seals and independently from the mud conduit, and in which, during operation, a buffer fluid can be provided.