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. 22, 2019
Filed:
Jan. 17, 2018
Applicant:
BJ Services, Llc, Tomball, TX (US);
Inventors:
Roderick B. Pernites, Spring, TX (US);
Felipe Padilla Florencia, Spring, TX (US);
Jordan Lee Clark, Tomball, TX (US);
Angel Gonzalez, Katy, TX (US);
Assignee:
BJ Services, LLC, Tomball, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 8/487 (2006.01); C04B 28/04 (2006.01); C04B 103/00 (2006.01);
U.S. Cl.
CPC ...
C09K 8/487 (2013.01); C04B 28/04 (2013.01); C04B 2103/0031 (2013.01); C04B 2103/0036 (2013.01);
Abstract
Cement slurries are provided for use in cementing oil and gas wells. The cement slurry comprises API Class C or Class H Portland cement and a pozzolan selected from the group consisting of pumice and mixtures of pumice and fly ash. Pumice is present in the mixtures in amounts at least about 40 wt % of the pozzolan. The weight ratio of the pozzolan to the cement is from about 35:65 to about 70:30. The novel cement slurries preferably will not comprise any additional lime, including hydrated lime, or other activators.