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:
Jul. 05, 1994
Filed:
Oct. 21, 1992
Michael H Johnson, Spring, TX (US);
Hang Nguyen, Spring, TX (US);
Lewis B Ledlow, Mandeville, LA (US);
Baker Hughes Incorporated, Houston, TX (US);
Abstract
A two-fluid method for fracturing a subterranean formation to increase the production of fluids from a well therein has been discovered. In a typical operation, a fluid pad is injected into the well which essentially simultaneously fractures the formation and forms a low permeability filter cake on at least part of the fracture. A proppant transport fluid containing proppant is then injected to prop open the fracture once the pressure is decreased. The filter cake is removed to permit production to begin. Although many conventional fluids may be used for the fluid pad, one preferred fluid pad uses graded calcium carbonate particle sizes and a modified lignosulfonate as a filter control agent. Optionally, a thixotropic polymer may be present as a viscosifier.