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. 23, 2007
Filed:
Nov. 05, 2004
B. Raghava Reddy, Duncan, OK (US);
Donald L. Whitfill, Kingwood, TX (US);
Krishna M. Ravi, Kingwood, TX (US);
Mark R. Savery, Duncan, OK (US);
B. Raghava Reddy, Duncan, OK (US);
Donald L. Whitfill, Kingwood, TX (US);
Krishna M. Ravi, Kingwood, TX (US);
Mark R. Savery, Duncan, OK (US);
Halliburton Energy Services, Inc., Duncan, OK (US);
Abstract
A lost circulation composition, that comprises a first portion of particles having a weight mean particle size of less than about 20 microns, a second portion of particles having a weight mean particle size in the range of from about 25 microns to about 400 microns, and a third portion of particles having a weight mean particle size in the range of from about 450 microns to about 1,500 microns, wherein the lost circulation composition has a multimodal particle size distribution, is provided, wherein resilient particles, particles comprising a thermoset polymer laminate, or a combination thereof are present in the lost circulation composition in an amount of at least about 20% by weight of the lost circulation composition, is provided. Drilling fluids, methods of controlling lost circulation, and methods of increasing an effective fracture gradient while drilling also are provided.