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Class Information
Number: 175/172
Name: Boring or penetrating the earth > With tool drive prime mover or above-ground mechanical motion converting drive means > With endless flexible conveyer
Description: Apparatus including material transport elements mounted to travel in a circuitous path on a flexible or articulated endless means, and generally for the purpose of conveying cuttings above ground.

Patents under this class:

Patent Number Title Of Patent Date Issued
7481280 Method and apparatus for conducting earth borehole operations using coiled casing Jan. 27, 2009
7469755 Method and apparatus for drilling and servicing subterranean wells with rotating coiled tubing Dec. 30, 2008
4483403 Shaft drilling machine Nov. 20, 1984
4444278 Rotatable drilling head Apr. 24, 1984

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