Boring or penetrating the earth – Processes – Sampling of earth formations
Patent
1985-12-05
1987-06-09
Leppink, James A.
Boring or penetrating the earth
Processes
Sampling of earth formations
175 96, 175253, 299 15, E21B 2510
Patent
active
046713670
ABSTRACT:
A drilling attachment for a utility truck designed for digging pole holes for ordinary utility and telephone poles is disclosed herein. The attachment is intended to replace the auger portion of a conventional auger digger when it is necessary to drill through rock or other hard materials. The excavating method contemplated employs a three step process. First, a deep kerf is cut into the rock by a plurality of drill bits that are independently driven in a rotary/percussive manner while being rotated about the circumference of the kerf. The dust and rock fragments generated by this process are removed from the kerf by an air flushing/vacuum system, that also serves to cool the drill bits. Second, a hydraulic piston is inserted into the kerf and expanded, thereby applying a lateral force to the base of the resultant core causing it to break away from the surrounding rock. Finally an expandable plug is inserted into a pilot hole located at the center of the core. The plug is then engaged and lifted, thereby removing the core.
REFERENCES:
patent: 1717271 (1929-06-01), Simmons
patent: 1867721 (1932-07-01), Wellensiek
patent: 1896106 (1933-02-01), Simmons
patent: 1987853 (1935-01-01), Howard et al.
patent: 2030015 (1936-02-01), McCurdy
patent: 2123453 (1938-07-01), Catland et al.
patent: 2951683 (1960-09-01), Tilden
patent: 2979318 (1961-04-01), Haspert et al.
patent: 3597929 (1971-08-01), Bodine
patent: 3948330 (1976-04-01), Langford, Jr.
patent: 3968845 (1976-07-01), Chaffin
patent: 4013319 (1977-03-01), Wise
patent: 4148366 (1979-04-01), Beckstrom et al.
Brunsing Thomas P.
Fisk Allan T.
Spector Joseph
Tallone Thomas
Electric Power Research Institute Inc.
Leppink James A.
Melius Terry Lee
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