Using a rotating inner member to drive a tool in a hollow...

Details Using a rotating inner member to drive a tool in a hollow... Using a rotating inner member to drive a tool in a hollow...

2006-04-11

2006-04-11

Tsay, Frank S. (Department: 3672)

Boring or penetrating the earth

Processes

Boring curved or redirected bores

C175S062000, C175S073000, C175S256000

Reexamination Certificate

active

07025152

ABSTRACT:
A rotating inner member is used to drive a downhole tool housed within the hollow outer member of a dual-member drill string. The downhole tool preferably will be adapted to receive rotational energy from the inner member. In a preferred embodiment, the downhole tool is an electric generator connected to a downhole electric device. In another preferred embodiment the downhole tool is a mechanical transmission that uses the rotational energy from the inner member to drive a non-electric tool, such as a downhole hammer. This invention will increase the consistency and efficiency of downhole energy production.

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