Tool for cutting groove in hole

Details Tool for cutting groove in hole Tool for cutting groove in hole

1974-08-29

1976-06-01

Taylor, Dennis L.

Boring or penetrating the earth

Cutter element laterally shiftable below ground

61 45B, E21B 926

Patent

active

039602222

ABSTRACT:
A tool for being inserted in a hole, especially a hole in an earth formation, and adapted for being rotated in the hole. A cutting element moveably mounted on the tool is provided for cutting a groove in the hole and, if the tool is moved axially in the hole while rotating, a helical groove will result. The cutting element is retractable to permit removal of the tool from the hole. The hole with the groove formed therein is adapted for receiving a roof bolt or the like which is cemented in place and the aforementioned groove improves the strength with which the bolt is held in the hole.

REFERENCES:
patent: 111099 (1871-01-01), Walch
patent: 564510 (1896-07-01), Elliott
patent: 945016 (1910-01-01), Caldwell
patent: 1681651 (1928-08-01), Woodruff
patent: 1705055 (1929-03-01), Allison
patent: 2193721 (1940-03-01), Gunderson
patent: 2599167 (1952-06-01), Dionisotti
patent: 2771746 (1956-11-01), Fischer et al.
patent: 3250075 (1966-10-01), Webb et al.
patent: 3422629 (1969-01-01), Watts

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