Drive connector with load compensator
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.
- Assignee:
- Brown Oil Tools, Inc.
- Patent Number(s):
- US 3964552
- OSTI ID:
- 7346022
- Country of Publication:
- United States
- Language:
- English
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