Bend limiter
AssigneeNational Oilwell Varco Denmark I/S
InventorBjarke Pedersen
Life of this patent
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Abstract
The present invention concerns a bend limiter suitable for protecting a flexible pipe against over bending. The bend limiter has a length extending between a first end and a second end and a hollow bore along its length. The hollow bore is defined by a surrounding bend limiter wall. The hollow bore has a centre line along the length of the bend limiter wherein the centre line of the hollow bore, when the bend limiter is in an unloaded condition, is a curved centre line or the centre line of the bore, when the bend limiter is in an unloaded condition, is a straight centre line and the bend limiter wall is at most two fold rotational symmetrical around the straight centre line.
Claims23
1-20. (canceled)
A bend limiter suitable for protecting an unbonded flexible offshore pipe, the bend limiter has a length extending between a first end and a second end and a hollow bore along its length, the hollow bore is defined by a surrounding bend limiter wall, the hollow bore has a centre line along the length of the bend limiter wherein the centre line of the hollow bore, when the bend limiter is in an unloaded condition, is a curved centre line or wherein the centre line of the bore, when the bend limiter is in an unloaded condition, is a straight centre line and the bend limiter wall is at most two fold rotational symmetrical around the straight centre line.
An unbonded flexible offshore pipe, the pipe comprising a protecting bend limiter, the bend limiter has a length extending between a first end and a second end and a hollow bore along its length, the hollow bore is defined by a surrounding bend limiter wall, the hollow bore has a centre line along the length of the bend limiter wherein the centre line of the hollow bore, when the bend limiter is in an unloaded condition, is a curved centre line or wherein the centre line of the bore, when the bend limiter is in an unloaded condition, is a straight centre line and the bend limiter wall is at most two fold rotational symmetrical around the straight centre line.
Dependencies are inferred from the claim text.