LIGHTWEIGHT INTERVENTION SYSTEM FOR USE WITH HORIZONTAL TREE WITH INTERNAL BALL VALVE

摘要

A lightweight intervention apparatus is described for use with a single bore intervention operation and which is suitable for use with a sub-sea horizont al tree with a tree cap and integral ball valve. The lightweight intervention apparatus is adapted to be coupled to the horizontal tree and that when so coupled the integral ball valve within the tree can be actuated via the intervention apparatus and cycled between an open and a closed position. The annulus line within the horizontal tree is adapted to be coupled through the lightweight intervention apparatus to a separate annulus line such that the annulus line is separate from the main bore to facilitate control of the annulus for certain well functions. A significant advantage of this arrangement is that the internal diameter of the main bore is not reduced in any way by apparatus or equipment for separating the annulus line from the main bore so that full bore diameter may be used. The lightweight interventi on apparatus includes a horizontal tree connector for mating with the sub-sea horizontal tree, a structural outer housing coupled to the horizontal tree connector and in which is located a sub-sea test tree and an upper top quick connect/disconnect connector which includes a sub-sea test tree latch within a pre-loaded external typeconnector.