Gerald Willard Haws
Engineers at Everett Ct, Littleton, CO
License number
Colorado 14600
Issued Date
Jan 13, 1977
Renew Date
Jul 1, 2008
Expiration Date
Jun 30, 2010
Type
Professional Engineer
Address
Address
4477 S Everett Ct, Littleton, CO 80123
Professional information
Bottom Hole Shut-In Tool
US Patent:
4804042, Feb 14, 1989
Filed:
Nov 24, 1987
Appl. No.:
7/124736
Inventors:
Robert C. Knight - Page AZ
Gerald W. Haws - Littleton CO
Gerald W. Haws - Littleton CO
Assignee:
Marathon Oil Company - Findlay OH
International Classification:
E21B 3328, E21B 3412
US Classification:
166184
Abstract:
A bottom hole shut-in tool incorporating a ball and seat shut-off valve and a ball and seat pressure equalizing valve. The ball elements of the valves are formed of elastomeric material, which allows the ball elements to engage their seats in continuous annular sealing contact even when debris from the well is trapped between a ball and its seat or when a ball is not exactly aligned with its seat. This arrangement effectively seals off the pressure gauge used in conducting a pressure survey from fluid in the well tubing located above the shut-off valve.
Water-In-Oil Microemulsion Drilling Fluids
US Patent:
4012329, Mar 15, 1977
Filed:
Sep 22, 1975
Appl. No.:
5/615280
Inventors:
John B. Hayes - Littleton CO
Gerald W. Haws - Littleton CO
William B. Gogarty - Littleton CO
Gerald W. Haws - Littleton CO
William B. Gogarty - Littleton CO
Assignee:
Marathon Oil Company - Findlay OH
International Classification:
C09K 702, C09K 706
US Classification:
252 85P
Abstract:
An oil-external microemulsion drilling fluid having a wide range of tolerance for salinity, having good gel strength and low fluid loss characteristics, and also obtained by mixing about 1% to about 30% of a sodium petroleum sulfonate having an average equivalent weight within the range of about 350 to about 525, about 5% to about 84% of a hydrocarbon (e. g. diesel fuel), about 15% to about 90% of an aqueous medium (can contain water soluble salts), about 0. 01 to about 20% of a cosurfactant (e. g. alcohols such as primary amyl alcohol) and about 0. 1 to about 15% of bentonite clay. Weighting agents, e. g. barite, and other desired additives can be added to the microemulsion.