Method and apparatus for underwater connection of pipe pieces and bolt therefor
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United States of America Patent
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Aug 27, 2002
Grant Date -
N/A
app pub date -
Apr 23, 1998
filing date -
Apr 24, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus for connecting two pieces of pipe having flanges when the pipe pieces are located deep under a water surface. A movable bolt wrench is provided which has a number of wrenches mounted in a frame corresponding to the bolt holes on the flanges of the pipe pieces. Bolts located in the bolt wrenches are aligned with the bolt holes of the flanges and inserted into the bolt holes. A nut wrench is also provided containing nuts which, when aligned, are threaded onto the ends of the bolts associated with the bolt wrench. After the bolt and nut connections are made, these bolts and nuts are tightened by the operation of the bolt and nut wrenches.
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