WILLIAM S CRAWFORD
Medical Practice at 5 Ave, Fort Worth, TX
License number
Florida 122526
Issued Date
Dec 30, 2014
Effective Date
Feb 1, 2017
Expiration Date
Jan 31, 2017
Category
Health Care
Type
Medical Doctor
Address
Address
800 5Th Ave, Fort Worth, TX 76104
Phone
(817) 250-4265
Professional information
Dr. William S Crawford, Fort Worth TX - MD (Doctor of Medicine)
Specialties:
Orthopedic Surgery
Age:
43
Address:
1500 S Main St, Fort Worth 76104
(817) 921-3431 (Phone), (817) 927-1697 (Fax)
(817) 921-3431 (Phone), (817) 927-1697 (Fax)
Languages:
English
Hospitals:
1500 S Main St, Fort Worth 76104
Education:
Medical School
University of Texas Southwestern Medical Center At Dallas
Graduated: 2010
University of Texas Southwestern Medical Center At Dallas
Graduated: 2010
Inhibited Oil Field Drilling Fluid
US Patent:
4310425, Jan 12, 1982
Filed:
Apr 17, 1980
Appl. No.:
6/140994
Inventors:
Morris D. Key - Dallas TX
William H. Crawford - Fort Worth TX
William H. Crawford - Fort Worth TX
Assignee:
Halabs, Incorporated - Fort Worth TX
International Classification:
C09K 702
US Classification:
252 85A
Abstract:
A drilling fluid containing water, a density-increasing agent, and a carbohydrate additive that is subject to deleterious attack in the drilling fluid to which is added a system that will produce in situ in the drilling fluid chlorine dioxide (ClO. sub. 2) for alleviating deleterious attack on the carbohydrate additive. The system producing the chlorine dioxide must produce an initial concentration which will reduce the viable organism count and maintain a residual concentration over a protracted interval of time so as to maintain the low bacterial level, maintain the pH of the drilling fluid in the range of 6. 0-8. 0, and otherwise not interfere with the rheological and beneficial effects of the drilling fluid.