Tool driving or impacting – Drive controlled by relative axial movement of tool – Drive motor controlled
Patent
1990-12-10
1992-05-05
Yost, Frank T.
Tool driving or impacting
Drive controlled by relative axial movement of tool
Drive motor controlled
173128, 173 91, 175296, 91234, E21B 706
Patent
active
051099322
ABSTRACT:
An impact borer is disclosed for embedding lines and for sinking geothermal wells. The impact borer has a shell, which has a longitudinal bore. An anvil closes one end of the bore. A ram is reciprocally slideable within the bore, against and away from the anvil. The ram divides the bore into front, rear, and ram chambers. A director is joined to the shell. The director is monolithic. The director isolates the front and rear chambers in alternation upon reciprocation of the ram. The director defines an inlet passage communicating with the ram chamber and an outlet passage communicating with the rear chamber.
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Allied: Hole-Hog.RTM. Underground Piercing Tool, Form No. HH15/88 2DM, 1988; Solon, Ohio.
Bueter John C.
Chandler Martin D.
Fields Randall T.
Laffkas Harry P.
Neuls Frederick W.
Industrial Engineering, Inc.
Smith Scott A.
Yost Frank T.
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