Rotary tong incorporating interchangeable jaws for drill pipe and casing
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United States of America Patent
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-
Feb 17, 1981
Grant Date -
N/A
app pub date -
Apr 24, 1979
filing date -
Apr 24, 1979
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A rotary tong used in well-drilling operations to make-up and break-out drill strings which incorporates readily-interchangeable sets of jaws, one of which may be used for drill pipe and the other of which can be used for relatively thin-walled well casing.
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