Equipment for drilling vertical boreholes

Boring or penetrating the earth – With below-ground tool drive prime mover – With means to anchor prime movers support to bore wall

Reexamination Certificate

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Details

C175S099000, C175S230000, C299S031000, C405S249000

Reexamination Certificate

active

06955232

ABSTRACT:
The invention relates to equipment for drilling a vertical borehole in hard ground, the equipment comprising:casing put successively into place in the borehole;a drilling machine having a rotary cutting head and presenting a structural frame;torque and thrust transmission means having a first end secured to the structural frame of the drilling machine; andsecuring means for securing the second end of the torque and thrust transmission means in translation and in rotation to said casing.

REFERENCES:
patent: 1147898 (1915-07-01), Seitz
patent: 1188001 (1916-06-01), May
patent: 1380203 (1921-05-01), Glick
patent: 1880217 (1932-10-01), Simmons
patent: 2091779 (1937-08-01), Gooder
patent: 2221226 (1940-11-01), Wick
patent: 2946578 (1960-07-01), De Smaele
patent: 3376942 (1968-04-01), Van Winkle
patent: 3881776 (1975-05-01), Fashbaugh et al.
patent: 4463814 (1984-08-01), Horstmeyer et al.
patent: 4494617 (1985-01-01), Snyder
patent: 4526242 (1985-07-01), Mathieu et al.
patent: 4688854 (1987-08-01), Pfeiffer
patent: 5649745 (1997-07-01), Anderson
patent: 169 319 (1906-04-01), None
patent: 2 234 448 (1975-01-01), None
patent: 2 275 633 (1976-01-01), None
patent: 938 191 (1963-10-01), None

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