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:
Aug. 14, 1984
Filed:
Jun. 30, 1982
Applicant:
Inventor:
Darrell D Porter, Englewood, CO (US);
Assignees:
Standard Oil Company (Indiana), Chicago, IL (US);
Gulf Oil Corporation, Chicago, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
F42D / ;
U.S. Cl.
CPC ...
102333 ; 102312 ; 102313 ; 102319 ; 405286 ; 166285 ; 166292 ;
Abstract
A plugging apparatus is provided to reliably plug a bottomless blast hole in underground oil shale retorts and oil and gas wells. The plugging apparatus has a special electrically powered sequencer which automatically lowers and releases a bag of cementatious slurry, supported by a drainpipe-reinforced concrete disc, from a canister to form a composite blasting plug in the blast hole.