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. 17, 1979
Filed:
Jun. 01, 1978
Applicant:
Inventor:
David S Pye, Brea, CA (US);
Assignee:
Union Oil Company of California, Brea, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
175 66 ; 175 71 ;
Abstract
An improved gas drilling method for drilling a well through steam-bearing formations in which emissions of particulate material and other contaminants are reduced by imposing a surface back pressure on, and thereby reducing the velocity of, the contaminant-bearing gas rising through the well. The drilling cuttings and other particulate material rising through the well are subjected to less abrasion and therefore arrive at the surface as larger, more easily separated particles. Drill string erosion is also reduced by the method and the efficiencies of any well effluent treatment facilities are increased.