Patent ID: 11879302
Assignee: INTERWELL NORWAY AS
Field: Mechanical elements (Mechanical engineering)
Classification: CPC E  F | IPC E  F

Claim 6:
7. A well tool device comprising:
a mandrel device having a longitudinal center axis;
a sealing device provided radially outside of the mandrel device,
wherein a sealing element of the sealing device is configured to be brought from a radially retracted state to a radially expanded state, where the sealing element in the radially expanded state is brought into sealing contact with an inner surface of a well,
wherein the well tool device further comprises an extrusion preventing device incorporated into the sealing element,
wherein the extrusion preventing device comprises a wire wound with a plurality of turns to form a torus-shaped coiled spring,
wherein each turn of the torus-shaped coiled spring is canted with a first angle (α1) with respect to a radial direction of a poloidal plane, and
wherein each turn of the torus-shaped coiled spring is canted with a second angle (α2) with respect to a longitudinal direction of the poloidal plane.