Chain drive system

Details Chain drive system Chain drive system

2007-05-29

2007-05-29

Gay, Jennifer H. (Department: 3672)

Boring or penetrating the earth

With below-ground tool drive prime mover

With mechanical motion-converting means

C175S104000, C175S107000, C074S424930

Reexamination Certificate

active

10857395

ABSTRACT:
A downhole tractor is provided that includes a motor, at least one rotatable screw powered by the motor, and a chain engageable with the at least one rotatable screw, whereby rotation of the at least one rotatable screw moves the chain.

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