Drill pipe turning device

Details Drill pipe turning device Drill pipe turning device

1984-09-17

1986-08-12

Schmidt, Frederick R.

Tools

Wrench, screwdriver, or driver therefor

Machine

81 5718, 81 572, B25B 1700

Patent

active

046049223

ABSTRACT:
A drill pipe spinner is disclosed including cam surfaces which in the course of tensioning the chain close the jaws of the spinner. The same cam surfaces provide jaw opening moments on release of the chain tension to allow the separation of the spinner from the pipe. These cam surfaces are formed on either side of two tracks in which two slides are fixedly connected to idlers which engage the chain. The idlers, moreover, are mounted for rotation on a transverse bar connected to a hydraulic actuator for tensioning the chain by convolving the chain path.

REFERENCES:
patent: 4099429 (1978-07-01), Hank
patent: 4212212 (1980-07-01), Chandler et al.
patent: 4324157 (1982-04-01), Soutsos
patent: 4471674 (1984-09-01), Doss

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