دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: any relatively sticky formation (such as clay) encountered in drilling.

n: a naturally occurring clay that contaminates the mud as the hole is being drilled.the clay hydrates rapidly to form a thick plug that can not pass through a marine riser or mud return line.

sticky, reactive shale formation.

abbr: lower marine-riser package. LNG abbr: liquefied natural gas.

Lower Marine Riser Package.

n: (LMRP) the equipment that attaches the lower part of the marine riser to the subsea blowout preventer (BOP) stack. It includes the BOP connector, a flexible joint to compensate for side-to-side movement, and the marine riser connector. See marine riser;subsea blow- out preventer:

an outer steel shell that connects a drill ship, jackup or floater to the well template on the ocean floor. The drill string is run through the riser and the returning mud and cutting flow u the drill pipe / riser annulus.

n: a fitting on top of the subsea blowout preventers to which the riser pipe is connected.

n: see riser pipe.

n: see riser pipe.

n: the act of removing the riser pipe (marine riser) from its attachment to the subsea blowout preventer stack.

n: the pipe and special fittings used on floating offshore drilling rigs to establish a seal between the top of the wellbore, which is on the ocean floor, and the drilling equipment, located above the surface of the water. A riser pipe serves as a guide for the drill stem from the drilling vessel to the wellhead and as a conductor of drilling fluid from the well to the vessel. The riser consists of several sections of pipe and includes special devices to compensate for any movement of the drilling rig caused by waves. Also called marine riser pipe.

n: a pneumatic or hydraulic device used to provide a constant strain in the cable that support the marine riser.