National Oilwell Varco Norway As

Anders Eriksson

Yngvar Borøy

Thor Strand

Anibal B Teixeira

A system for hoisting a load on a drilling rig includes: a hoisting means having an elongated hoisting member and an elongated hoisting member drive means; a drill string rotation means suspended from an end of the elongated hoisting member; a support structure having a first side and a second side and being adapted to support at least a portion of the weight the drill string rotation means; a first elongated hoisting member guiding means connected to the support structure; and a counterweight connected to the elongated hoisting member at the second side of the support structure. The elongated hoisting member is reeved over the first elongated hoisting member guiding means from the first to the second side of the support structure. The drill string rotation means is suspended from the elongated hoisting member at the first side of the support structure.

System for hoisting a load on a drilling rig

A winch drum device includes a first winch drum with an outer surface adapted to accommodate axially displaced turns of wire rope and further includes a wire rope storage means, such as a recess, extending at least partially radially in from said outer surface. The wire rope storage means is adapted to accommodate one or more layers of the wire rope. The winch drum device may be incorporated into a winch.

Growing community of inventors

Fornebu, Norway

Anders Eriksson