Hoisting crane and offshore vessel

Hoisting crane comprising:

• a substantially hollow vertical column with a foot which is or can be fixed to a support, and with a top,
• a jib,
• an annular bearing structure, which extends around the vertical column and guides and carries a jib connection member, so that the jib connection member can rotate about the column, the jib connection member forming a substantially horizontal pivot axis so that the jib can be pivoted up and down,
• topping means for pivoting the jib up and down, comprising a jib winch and a jib hoisting cable,
• a top cable guide at the top of the vertical column;
• the top cable guide comprising a rotary bearing structure, so that the top cable guide can follow rotary movements of the jib about the vertical column and adopts substantially the same angular position as the jib,
• one or more hoisting cable guides on the jib of the hoisting crane;
• hoisting means for hoisting a load, comprising a hoisting winch and an associated hoisting cable;
• the hoisting winch being disposed in the column, preferably in the vicinity of the foot of the vertical column, so that the hoisting cable extends from the winch through the hollow vertical column to the top cable guide and then to a hoisting cable guide on the jib,
• wherein the jib winch and the hoisting winch are arranged on a rotatable winch support, which is rotatable about a rotation axis substantially parallel with the vertical column, such that the winch support is mounted movable with respect to the vertical column;
• the winch support having an associated drive motor assembly for moving the winch support, in such a manner that the winch support maintains a substantially constant orientation with respect to the jib in the event of rotary movements of the jib about the vertical column,
• wherein
• the hoisting crane further comprises a deep water winch positioned below the movable winch support and an associated deep water cable for raising and lowering a load extending through the rotation axis of the movable winch support, so that the deep water cable extends from the deep water winch through the hollow vertical column to the top cable guide and then to a hoisting cable guide on the jib.