04442896 is referenced by 233 patents and cites 6 patents.

A method of preparing an underground bed for treatment. A channel is formed in the bed extending from the ground down through the bed and up to the ground. A cutting device is inserted into the channel operated to form a pathway in a substantially vertical plane.

Title
Treatment of underground beds
Application Number
6/400323
Publication Number
4442896
Application Date
July 21, 1982
Publication Date
April 17, 1984
Inventor
William R McKay
2700 Carlton St., SW., Calgary, Alberta
CA
Lucio V Reale
1371 Lake Ontario Dr., SE., Lake Bonavista, Clagary, Calberta
CA
Agent
Townsend and Townsend
IPC
E21C 25/54
E21B 43/04
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