Patent ID: 8511385

Claim:
Well apparatus comprising: a tower having sides and having vertical rails, two of said vertical rails defining an opening at one of said sides of the tower providing access to an internal operational area of the tower, a support for supporting well intervention, completion, testing, or drilling equipment, said support being attached to the tower and being movable laterally from a parked position on the tower, wherein in said parked position, said support does not occupy said operational area where the equipment is to operate on the well to allow the preparation of the equipment, and an operational position in the operational area, wherein the support is arranged to be lowered or lifted, and a guide mechanism for guiding the support so that as the support is lowered or lifted, the support is guided along a path involving lateral movement from the parked position to the operational position in the operational area, wherein the guide mechanism for guiding the support comprises a pair of upper arms pivotally mounted on the tower and a pair of lower arms pivotally mounted on the tower below the upper arms, and wherein one arm of each pair of arms is pivotally mounted to one of the vertical rails defining the opening, and the other arm of each pair of arms is pivotally mounted to the other of the vertical rails defining the opening thereby enabling the support to move between the parked and operational positions through the opening.