Title:
CLAMPING CHAIN
Document Type and Number:
WIPO Patent Application WO/2013/023755
Kind Code:
A3
Abstract:
The invention relates to a clamping chain (1) for transmitting driving forces to a drill pipe, said clamping chain consisting of shell-shaped ring pieces (3) that are pivotally interconnected via links (2).
Inventors:
WURM WERNER (DE)
Application Number:
PCT/EP2012/003367
Publication Date:
November 07, 2013
Filing Date:
August 07, 2012
Export Citation:
Assignee:
PRIME DRILLING GMBH (DE)
WURM WERNER (DE)
WURM WERNER (DE)
International Classes:
E21B7/20
Foreign References:
| US4336637A | 1982-06-29 | |||
| US7985037B2 | 2011-07-26 | |||
| DE3642358A1 | 1988-06-23 | |||
| US3880024A | 1975-04-29 | |||
| US4341406A | 1982-07-27 | |||
| US6030006A | 2000-02-29 | |||
| DE19750251A1 | 1999-06-02 |
Attorney, Agent or Firm:
KÖNIG - SZYNKA - TILMANN - VON RENESSE (Düsseldorf, DE)
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