Title:
DRILLPIPE SPINNER
Document Type and Number:
WIPO Patent Application WO2005026492
Kind Code:
A3
Abstract:
The invention relates to an improved drill pipe spinner device that is used in the make-up and break-out of drillpipe, either as a stand alone tool or as part of an Iron Roughneck, which has easily removable roller brackets for quick replacement of the spinning unit. The spinner comprises a pair of hydraulically actuated clamping arms. Attached to the distal ends of each arm is a roller bracket, each, preferably, being attached to the clamping arms by a roller bracket pin. Each roller bracket includes a pair of hydraulically driven drive roller assemblies, which together form the spinning unit. If the rollers of the spinner have to be repaired, serviced or replaced, the arm brackets are easily removed by simply pulling the roller bracket pin and removing the roller bracket. The spinning unit can easily be removed and replaced on the rig floor by changing out the roller bracket.
Inventors:
BELIK JAROSLAV (US)
Application Number:
PCT/US2004/028749
Publication Date:
August 25, 2005
Filing Date:
September 03, 2004
Export Citation:
Assignee:
NAT OILWELL LP (US)
International Classes:
E21B19/16; (IPC1-7): B25B17/00
Foreign References:
| US20030164071A1 | 2003-09-04 | |||
| US20050076744A1 | 2005-04-14 | |||
| US6253845B1 | 2001-07-03 | |||
| US6065372A | 2000-05-23 | |||
| US5660087A | 1997-08-26 | |||
| US4774861A | 1988-10-04 | |||
| US4446761A | 1984-05-08 | |||
| US4381685A | 1983-05-03 | |||
| US4221269A | 1980-09-09 | |||
| US3892148A | 1975-07-01 | |||
| US3392609A | 1968-07-16 |
Other References:
See also references of EP 1660277A4
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