Rock bit

Details Rock bit Rock bit

E - Fixed Constructions

21

B

255/73

E21B 10/22 (2006.01) E21B 10/24 (2006.01) F16C 33/66 (2006.01)

Patent

CA 1146157

IMPROVED ROCK BIT Abstract of the Disclosure An improved rock bit that includes a body arranged to be connected to a drilling string or the like and having an axle portion thereon. A cutting member journaled on the axle portion having a cavity formed between the axle portion and cutting member in which there is disposed a bearing for rotatably supporting the cutting member on the axle portion. A permeable material having a lubricant in the pores in the material is located in the cavity in contact with the bearing whereby the lubricant in the pores is gradually deposited on the bearing to provide a continuous in situ lubrication of the rock bit. The permeable material is a gel that is formed as a lubricant and is mixed with poly- ethylene and heated to a predetermined temperature.

366891

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