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:
Mar. 01, 2022
Filed:
May. 01, 2019
Applicants:
Ping Duan, Cypress, TX (US);
Anil Sadana, Houston, TX (US);
Inventors:
Ping Duan, Cypress, TX (US);
Anil Sadana, Houston, TX (US);
Assignee:
BAKER HUGHES OILFIELD OPERATIONS LLC, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 18/10 (2006.01); E21B 41/00 (2006.01); E21B 33/14 (2006.01); E21B 37/02 (2006.01); C08G 18/42 (2006.01); C08G 18/32 (2006.01); C08G 18/66 (2006.01); C08G 18/76 (2006.01); C08G 18/48 (2006.01);
U.S. Cl.
CPC ...
C08G 18/10 (2013.01); C08G 18/3206 (2013.01); C08G 18/3215 (2013.01); C08G 18/3243 (2013.01); C08G 18/4263 (2013.01); C08G 18/48 (2013.01); C08G 18/664 (2013.01); C08G 18/6644 (2013.01); C08G 18/6651 (2013.01); C08G 18/6685 (2013.01); C08G 18/7614 (2013.01); C08G 18/7671 (2013.01); E21B 33/14 (2013.01); E21B 37/02 (2013.01); E21B 41/00 (2013.01);
Abstract
A method for operation in wellbore, the method comprises: pumping a fluid barrier into a wellbore through a tubular, the fluid barrier being operable to separate a cement slurry from a second fluid; the fluid barrier comprising a polyurethane member derived from a polyurethane forming composition comprising a para-phenylene diisocyanate terminated polycarbonate prepolymer and an aromatic diol.