Wire Back Tension Device
AssigneeNational Oilwell Varco Norway AS
InventorsYngvar BORØY, Adrian Mihai ORASANU, Thor STRAND
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Abstract
A device for tensioning an elongated hoisting member, comprises: a first friction-generating member rotatably supported around a first support member; a second friction-generating member rotatably supported around a second support member, the first and second friction-generating members being adapted to provide friction to the elongated hoisting member when the friction-generating members are pressed against each other with a portion of the elongated hoisting member therebetween. A brake is provided for braking the rotation of the friction-generating members around the support members. There is also described a system that includes such a device, as well as a method for operating such a system.
Claims15
Device for tensioning an elongated hoisting member, comprising:
- a first friction-generating member rotatably supported around a first support member;
- a second friction-generating member rotatably supported around a second support member, said first and second friction-generating members being adapted to provide friction to the elongated hoisting member when said first and second friction-generating members are pressed against each other with a portion of the elongated hoisting member there-between;
- and
- a brake configured to stop the rotation of said first and second friction-generating members around said first and second support members.
Dependencies are inferred from the claim text.