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:
Jan. 03, 1978
Filed:
Jan. 20, 1975
Applicant:
Inventor:
J Gilbert Davis, II, Morgantown, WV (US);
Assignee:
Continental Oil Company, Ponca City, OK (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E02D / ; E21F / ;
U.S. Cl.
CPC ...
61 3 / ; 299 12 ;
Abstract
Gas flow from a coal seam to a mine face in the seam is blocked by drilling a hole from the face into the seam in a direction generally parallel to the direction of the flow of the gas to be blocked; forming a notch at the interior end of the hole; injecting a fluid into the hole and notch under a pressure sufficient to hydraulically fracture the seam along a plane extending substantially perpendicular to the hole and to the direction of gas flow; and filling such fracture with a barrier-forming fluid. The hole is then plugged to prevent retrograde flow of the fluid to the mine face.