Method of formation of tree cover foldable ROV, method for installing lid of a Christmas tree on Christmas tree submarine underwater.The lid of the tree of light weight foldable ROV underwater tree

摘要

Method of formation of tree cover foldable ROV, method for installing lid of a Christmas tree on Christmas tree submarine underwater.The lid of the tree of light weight foldable ROV underwater Pope tree ".The present invention relates to a tree cap (28) of low weight for ROV for deployment on a folding cylinder (10) of a subsea production tree subsea.A lid of the tree (28) has body of low weight (30) with sides parallel planes and includes openings and apertures suitable for mounting on the various elements of the operation.A structure of the closing plate (64) includes a piston (66) connected to a closing plate (68) which has a pair of members for closing tubular projecting downwards (70, 72),To fit in the hole of the production (13) and the orifice ring (15) of the cylinder of the tree (10) in a horizontal position sealed.Applies fluid pressure to the fluid line (96) to force the piston (66) and the closing plate (68) down in the horizontal position of the closure.For the removal or withdrawal of the tree cap (28) of the installed position on the cylinder of the subsea tree (10) applies pressure fluid through the lines of fluid (108,110) for vertical movement to the top of the closing plate (68) and members of the closing tubular (70,72) from the closing position of the hole of production (13) and the orifice ring (15).The hydraulic fluid is supplied from the ROV by means of coupling of fluids (98, 112) which are insertable in the enclosures (110, 114) of the body of the cover tree (30).The couplers of the fluid (98,112) are removed from the receptacles of the operation after the installation of the tree cap (28) and are stationed in other receptacles on a tree structure until they are needed for otherFunctions, such as the removal of the lid of the tree (28). A cap may be positioned on the shelf tree tree structure and is installed on the cylinder of the tree through the ROV.