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:
Feb. 08, 1983
Filed:
May. 04, 1981
Lubomyr M Cymbalisty, Edmonton, CA;
Alvin J Maskwa, Edmonton, CA;
Lloyd W Trevoy, Edmonton, CA;
Jan Wojno, Edmonton, CA;
Petro-Canada Exploration Inc., Calgary, CA;
Her Majesty the Queen in right of the Province of Alberta, Government of, , US;
PanCanadian Petroleum Limited, Calgary, CA;
Esso Resources Canada Ltd., Calgary, CA;
Canada-Cities Service, Ltd., Calgary, CA;
Gulf Canada Limited, Calgary, CA;
Alberta Energy Company Ltd., Calgary, CA;
Hudson's Bay Oil and Gas Company Limited, Calgary, CA;
Petrofina Canada Inc., Calgary, CA;
Abstract
The invention provides a method and apparatus for sampling a frozen core of tar sand. The frozen core is first cut transversely along its length to form a pair of slabs of semi-circular cross-section. A longitudinal sample portion of substantially triangular cross-section is then cut from the central portion of the still frozen slab. The triangular sample portion is ground in a cryogenic grinder to produce a finely divided, substantially homogeneous material from which small representative sub-samples may be obtained. The triangular sample portion is cut from the slab by a pair of angularly disposed circular saws carried along the length of the slab. The slab is supported and held by cradle means which fix the flat face of the slab in a predetermined plane. The longitudinal sample portion thus formed has a triangular cross-section of substantially constant cross-sectional area.