Earth boring bit with means for conducting heat from the bit's b

Details Earth boring bit with means for conducting heat from the bit's b Earth boring bit with means for conducting heat from the bit's b

1974-06-28

1976-02-03

Purser, Ernest R.

Boring or penetrating the earth

With heating or cooling drilling fluid

175228, 175331, 175372, 308 82, 308 76, 184 622, E21B 700

Patent

active

039359115

ABSTRACT:
The present invention provides a rotary rock bit with a heat pipe for conducting heat from the bit's bearings. The rotary rock bit includes a bit body with a connection for connecting the bit body to a rotary drill string. At least one arm extends from the bit body and a rotatable cutter is mounted on said arm. Bearing means are located between the rotatable cutter and the arm for promoting rotation of the cutter. A heat pipe is positioned in the bit body and the heat pipe extends into the arm. The heat pipe includes an evaporator section located near the bearings and a condenser section located near the external surface of the bit.

REFERENCES:
patent: 1870696 (1932-08-01), Taylor
patent: 2356578 (1944-08-01), Galtney
patent: 2861780 (1958-11-01), Butler
patent: 3062302 (1962-11-01), Toth et al.
patent: 3163695 (1964-12-01), Blumberger
patent: 3650337 (1972-03-01), Andrews et al.
patent: 3706483 (1972-12-01), Irwin
patent: 3719241 (1973-03-01), Bell
patent: 3735825 (1973-05-01), Keller

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