摘要 |
A kelly spinner for a drilling rig and installation method are disclosed. The spinner is installed directly to a stem of the derrick swivel by means of an adjustable sleeve which fits around the swivel stem. A clamping device is tightened to secure the sleeve to the stem and the clamp to the sleeve. A ring gear bolted to the clamp body is rotated by dual hydraulic or pneumatic motors to rotate the spinner.
|