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:
Apr. 08, 2014
Filed:
Feb. 20, 2013
Applicant:
Gasfrac Energy Services Inc., Calgary, CA;
Inventors:
Dwight N. Loree, Black Creek, CA;
Shaun T. Mesher, Calgary, CA;
Assignee:
GASFRAC Energy Services Inc., Calgary, CA;
Primary Examiner:
Int. Cl.
CPC ...
E21B 43/26 (2006.01);
U.S. Cl.
CPC ...
Abstract
A fracturing system for a well, in which a stream of LPG, a mixture of propane and butane, is injected into the well at frac pressure. Proppant is supplied into the LPG stream, and carried by the LPG mix into the formation. Inert gas such as nitrogen is used for purging system components of LPG, and to help protect against risk of explosion. Nitrogen may also be added to the LPG mix during a frac of shale gas or coal gas formations.