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:
Oct. 20, 2020
Filed:
Oct. 26, 2018
Applicant:
Fairmount Santrol Inc., Independence, OH (US);
Inventors:
Huaxiang Yang, Sugar Land, TX (US);
An Thien Nguyen, Sugar Land, TX (US);
Vinay Mehta, Richmond, TX (US);
Assignee:
FAIRMOUNT SANTROL INC., Independence, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 33/138 (2006.01); C09K 8/518 (2006.01); C09K 8/508 (2006.01); B01J 13/04 (2006.01);
U.S. Cl.
CPC ...
C09K 8/518 (2013.01); B01J 13/04 (2013.01); C09K 8/508 (2013.01); E21B 33/138 (2013.01);
Abstract
A perforation ball sealer for temporarily plugging a perforation in an oil or gas well comprises a polymer foam core and a shell surrounding the core formed from a solid or essentially solid second polymer. Both the core and the shell are made from slowly water-soluble polymers.