Using a rotating inner member to drive a tool in a hollow outer member
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United States of America Patent
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Mar 25, 2008
Grant Date -
N/A
app pub date -
Jan 25, 2006
filing date -
Jan 15, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
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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