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API SPEC 16F-2004 pdf free download

API SPEC 16F-2004 pdf free download.Specification for Marine Drilling Riser Equipment.
3 Definitions and Abbreviations 3.1 accumulator (BOP): A pressure vessel charged with gas over liquid and used to store hydraulic fluid under pressure for operation of blowout preventers. 3.2 accumulator (riser tensioner): A pressure vessel charged with gas over liquid that is pressurized on the gas side from the tensioner high-pressure gas supply bottles and supplies high-pressure hydraulic fluid to energize the riser tensioner cylinder. 3.3 actuator: A mechanism for the remote or automatic operation of a valve or choke. 3.4 air can buoyancy: Tension applied to the riser string by the net buoyancy of a chamber created by a closed-top, open-bot- tom cylinder forming an annulus around the outside of the riser pipe that is filled with air or other low density fluid. 3.5 annulus: The space between two pipes, when one pipe is laterally positioned inside the other. 3.6 auxiliary line: A conduit (excluding choke and kill lines) attached to the outside of the riser main tube (e.g., hydraulic sup- ply line, buoyancy control line, mud boost line). 3.7 back pressure: The pressure resulting from restriction of fluid flow downstream. 3.8 ball joint: A ball and socket assembly having central through-passage equal to or greater than the riser internal diameter that may be positioned in the riser string to reduce local bending stresses. 3.9 blowout: An uncontrolled flow of well fluids from the wellbore. 3.10 Blowout Preventer (BOP): A device attached immediately above the casing, which can be closed to shut in the well. 3.11 Blowout Preventer, annular type: A remotely controlled device that can form a seal in the annular space around any object in the wellbore or upon itself. Compression of reinforced elastomer packing element by hydraulic pressure effects seal. 3.12 BOP Stack: An assembly of well control equipment including BOPs, spools, valves, hydraulic connectors, and nipples that connect to the subsea wellhead. Common usage of this term sometimes includes the Lower Marine Riser Package (LMRP).
3.18 control pod: An assembly of subsea valves and regulators which when activated from the surface will direct hydraulic fluid through special porting to operate BOP equipment. 3.19 coupling: A mechanical means for joining two sections of riser pipe in end-to-end engagement. 3.20 diverter: A device attached to the wellhead or marine riser to close the vertical flow path and direct well flow away from the drill floor and rig. 3.21 drape hose (moonpool line): A flexible line connecting a choke, kill, and auxiliary line terminal fitting on the tele- scopic joint to the appropriate piping on the rig structure. A U-shaped bend in this line allows for relative movement between the vessel and the outer barrel of the telescopic joint as the vessel moves. 3.22 drilling fluid: A water or oil-based fluid circulated down the drill pipe into the well and back up to the rig for purposes including containment of formation pressure, the removal of cuttings, bit lubrication and cooling, treating the wall of the well and providing a source for well data. 3.23 effective hydraulic cylinder area: Net area of moving parts exposed to tensioner hydraulic pressure. 3.24 factory acceptance testing: Testing by a manufacturer of a particular product to validate its conformance to perform specifications and ratings.
3.25 fill-up line: The line through which fluid is added to the riser annulus. 3.26 fleet angle: In marine riser nomenclature, the fleet angle is the angle between the vertical axis and a riser tensioner line (or hydraulic cylinder rod for direct acting tensioners) at the point where the line (or rod) connects to the telescopic joint (see API RP 16Q). 3.27 flex joint: A steel and elastomer assembly having central through-passage equal to or greater in diameter than the riser bore that may be positioned in the riser string to reduce local bending stresses. 3.28 full length riser joint: A joint of typical length for a particular drilling vessel’s riser storage racks, the derrick V-door size, riser handling equipment capacity or a particular riser purchase. 3.29 handling tool (running tool): A device that joins to the upper end of a riser joint to permit the lifting and lowering of the joint and the assembled riser string in the derrick by the elevators. 3.30 heave: Vessel motion in the vertical direction. 3.31 hot spot stress: See 3.41. 3.32 hydraulic connector: A mechanical connector that is activated hydraulically and connects the BOP Stack to the well- head or the LMRP to the BOP Stack. 3.33 hydraulic supply line: An auxiliary line from the vessel to the subsea BOP Stack that supplies control system operating fluid to the LMRP and the BOP Stack.

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