US PATENT SUBCLASS 340 / 853.6
.~.~ Control of drill bit or apparatus (e.g., steering, speed, etc.)

Current as of: June, 1999
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340 /   HD   COMMUNICATIONS: ELECTRICAL

853.1  DF  WELLBORE TELEMETERING OR CONTROL (E.G., SUBSURFACE TOOL GUIDANCE, DATA TRANSFER, ETC.) {14}
853.3  DF  .~ Selective control of subsurface equipment {2}
853.6.~.~ Control of drill bit or apparatus (e.g., steering, speed, etc.)

DEFINITION

Classification: 340/853.6

Control of drill bit or apparatus (e.g., steering, speed, etc.):

(under subclass 853.3) Subject matter including a drilling equipment controlled by an electrical communications system.