Tool driving or impacting – Means to drive tool about an axis – Means to hold and relatively rotate sections of tool shaft
Patent
1975-01-23
1976-06-22
Purser, Ernest R.
Tool driving or impacting
Means to drive tool about an axis
Means to hold and relatively rotate sections of tool shaft
308207A, E21B 300
Patent
active
039645525
ABSTRACT:
Disclosed is a rotary drive assembly for manipulating well pipe. The assembly, which is carried by the traveling block in a drilling derrick, provides means for engaging well pipe by either threaded or non-threaded connection. The threaded connection is used during drilling for imparting rotary motion to pipe forming a drill string. A torque-clamp, connector sub, and pipe guide combination provides male threads within a guiding surface to facilitate the threaded connection to pipe members. A break-out elevator provides a non-threaded connection which is used for manipulating pipe members and for making up or breaking out a connection between threaded pipe segments. A spring and roller assembly in the elevator facilitates the gripping of a pipe segment by the elevator and cushions the impact on the rotary drive assembly when the elevator is used to lift well pipe. Another spring and roller assembly in the drive head permits manual rotation of the drive connector to align the elevator for insertion or removal of a pipe segment.
REFERENCES:
patent: 3312294 (1967-04-01), Wilson
patent: 3706347 (1972-12-01), Brown
patent: 3744577 (1973-07-01), Williams
patent: 3766991 (1973-10-01), Brown
patent: 3776320 (1973-12-01), Brown
patent: 3867989 (1975-02-01), Hisey et al.
Brown Oil Tools, Inc.
Favreau Richard E.
Purser Ernest R.
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