Offset elevator for a pipe running tool and a method of using a pipe running tool
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United States of America Patent
Stats
-
Oct 28, 2003
Grant Date -
Jan 2, 2003
app pub date -
Dec 20, 2001
filing date -
Mar 5, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A pipe running tool for use in an oil drilling system and the like comprises a lower drive shaft adapted to engage a drive shaft of a top drive assembly for rotation therewith. The pipe running tool further includes a lower pipe engagement assembly which is driven to rotate by the lower drive shaft, and is designed to releasably engage a pipe segment in such a manner to substantially prevent relative rotation between the two. Thus, when the lower pipe engagement assembly is actuated to securely hold a pipe segment, the top drive assembly may be actuated to rotate the top drive output shaft, which causes the lower drive shaft and lower pipe engagement assembly to rotate, which in turn rotates the pipe segment. The pipe running tool having a greater slip back offset such that drill pipe and drill pipe tool joints may be passed through the central passageway of the tool without interfering with the front of the slip.
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