Patent ID: 8052369
Filing Date: 2011-11-08
Classification: E21B

Abstract:
1. System for storing a substantially vertical riser section and transporting the riser section between a vertical storage device and a catwalk or a derrick, comprising a vertical storage device for storing the riser section in a substantially vertical orientation, a crane constituting a single transport means for transporting the riser section between the vertical storage device and the catwalk or derrick, the crane being configured to grip the riser section and transport the riser section to the catwalk or derrick, wherein the vertical storage device comprises a shaft for storing the riser section in said substantially vertical orientation, the crane is a knuckle boom crane, which has a grapple that is adapted to be inserted inside an upper end of the substantially vertical riser section to grip the upper end of the riser section and wherein the crane is further adapted to lift the riser section, while the riser section is in said substantially vertical orientation, a substantially vertical distance at least corresponding to the length of the riser section and carry the riser section in said substantially vertical orientation from the vertical storage device to the catwalk or derrick, the crane being adapted to co-operate with a guiding means for guiding the riser section while it is being lifted out of the vertical storage device, further comprising a trolley for displacing the guiding means, the trolley running on first tracks at either side of an insertion and retrieving opening at a top end of the vertical storage device, the trolley comprising a beam extending substantially at a right angle to the first tracks and a second track on which the guide means is moveable in a direction substantially at a right angle to the first tracks, so that the guide means is movable with the trolley in a first direction parallel to said first tracks and in a second direction, perpendicular to said first direction, said movement being in a horizontal plane over top of all of the riser sections in the vertical storage device, and so that the riser sections disposed in the vertical storage device can be accessed by means of their x-y co-ordinates.