# US 2018/0320799 A1 · A method for subsea deployment of discrete lengths of flexible jumper pipes > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0320799 A1 - Document ID: US20180320799A1 - Status: Published application - Kind: A1 - Application number: 15/773,223 - Filed: 2016-11-03 - Published: 2018-11-08 - Earliest claimed: 2015-11-04 - Assignees: Vetco Gray Scandinavia AS - Applicants: Vetco Gray Scandinavia AS - Inventors: Steinar HESTETUN; Alexander FJELDLY - Web page: https://patentgrep.com/patent/US20180320799A1 ## CPC - F16L 1/203: {the pipes being wound spirally prior to laying} - E21B 17/046: with ribs, pins, or jaws, and complementary grooves or the like, e.g. bayonet catches - E21B 19/002: {specially adapted for underwater drilling (E21B19/09, E21B19/143 take precedence)} - E21B 43/01: specially adapted for obtaining from underwater installations - F16L 1/15: vertically - F16L 1/16: on the bottom - F16L 1/19: the pipes being J-shaped - E21B 17/20: Flexible or articulated drilling pipes {, e.g. flexible or articulated rods, pipes or cables} - F16L 1/161: {the pipe being composed of sections of short length} - F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS ## Abstract A method for deployment of discrete lengths of flexible jumper pipes for installation subsea is provided, comprising coupling the jumper pipes together end-to-end thus forming a flexible train of jumper pipes, and winding the train of jumper pipes on a drum suitable for transport to a deployment site by a pipe-laying vessel. On site, the train of jumper pipes is unreeled from the drum until the first jumper pipe is lowered into the sea, then the drum is halted and the trailing end of the first jumper pipe is detached from the leading end of the second jumper pipe in the train of jumper pipes. The trailing end of the first jumper pipe is shifted to a lowering wire, and the first jumper pipe is lowered to the sea bottom. The process is repeated until the discrete lengths of flexible jumper pipes are individually lowered into the sea. ## Claims ### Claim 1 A method for deployment of discrete lengths of flexible jumper pipes for installation subsea comprising: coupling the jumper pipes together end-to-end thus forming a flexible train of jumper pipes; winding the train of jumper pipes on a drum suitable for transport to a deployment site by a pipe-laying vessel; unreeling the train of jumper pipes from the drum until the first jumper pipe is lowered into the sea, then halting the drum; detaching the trailing end of the first jumper pipe from the leading end of the second jumper pipe in the train of jumper pipes; shifting the trailing end of the first jumper pipe to a lowering wire; lowering the first jumper pipe to the sea bottom; and repeating the previous steps until the discrete lengths of flexible jumper pipes are individually lowered into the sea. ### Claim 2 (depends on 1) The method of claim 1, wherein unreeling includes feeding the train of jumper pipes in a path towards a working platform, the method further comprising: arresting the detached trailing end of the first jumper pipe above the platform while installing an end termination assembly thereto. ### Claim 3 (depends on 1) The method of claim 1, wherein the train of jumper pipes are fed in a vertical, near-vertical or slanted path towards the working platform. ### Claim 4 (depends on 1) The method of claim 1, comprising: parking the detached leading end of the second jumper pipe at the side of the vertical or near-vertical feed path while installing an end termination assembly in the trailing end of the first jumper pipe. ### Claim 5 (depends on 1) The method of claim 1, comprising halting the feed of the train of jumper pipes while installing end termination assemblies in the leading ends of the discrete jumper pipes before lowering into the sea. ### Claim 6 (depends on 1) The method of claim 1, wherein the working platform is a structural part of a J-Lay ramp or a VLS (Vertical Landing System) tower, and feeding the train of jumper pipes comprises intermittent drive of top and bottom tensioners on the ramp or tower. ### Claim 7 (depends on 6) The method of claim 6, wherein the top and bottom tensioners are alternatingly operated in feeding/closed and non-feeding/open modes to permit the feed of end-fittings through the tensioners. ### Claim 8 (depends on 1) The method of claim 1, wherein parking the detached leading end of the second jumper pipe at the side of the vertical, near-vertical or slanted feed path comprises shifting said leading end to the end of a wire of a pulling winch on the working platform. ### Claim 9 (depends on 1) The method of claim 1, wherein coupling the jumper pipes together end to end comprises fixation of end-fittings in a split clamp with a male/female adapter insert installed between the end-fittings. ### Claim 10 (depends on 1) The method of claim 1, wherein arresting the trailing end of the jumper pipe above the platform comprises closing an adjustable opening through the working platform around the jumper pipe.