دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

v: to run and cement casing at a certain depth in the wellbore. Sometimes called set pipe.

v: The work of pulling the casing into the hole.

the actions involved with running casing and cementing it in place.

n: the depth at which the bottom of the casing extends in the wellbore when it is ready to be cemented.

n: The depth of the casing or liner reaching in the well.

n: the component in a blowout preventer that cuts. or shears, through drill pipe and forms a seal against well pressure. Shear rams are used in floating offshore drilling operations to provide a quick method of moving the rig away from the hole when there is no time to trip the drill stern out of the hole.

n: the component of the BOP stack (q.v.) that cuts through the drill pipe and forms aseal across the wellbore. These are used on floaters when the rig must be moved off location in an emergency.

a ram in the BOP that shears off the pipe.

(pronounced shiv") n: I. a grooved pulley. 2. support wheel over which tape, wire, or cable rides.

n: A pulley. In oilfield usage, the term usually refers to either the pulleys permanently mounted on the top of the rig (the crown blocks),or the pulleys used for running wireline tools into the wellbore. In the case of the crown blocks, the drilling line,

a grooved pulley.

surface equipment used for quick access to the wellbore.

n: the displacing of wellbore fluids from the annulus up the tubing. Compare long way.

a wellbore where an explosive such as nitroglycerin has been exploded.

a shallow wellbore filled with explosives and shot as a seismic signal.

n: (SIP) the pressure when the well is completely shut in, as noted on a gauge installed on the surface control valves. When drilling is in progress, shut- in pressure should be zero, because the pressure exerted by the drilling fluid should be equal to or greater than the pressure exerted by the formations through which the wellbore passes. On a flowing, producing well, however, shut-in pressure should be above zero.

n: The surface force per unit area exerted at the top of a wellbore when it is closed at either the Christmas tree or the BOP stack. The pressure may be from the formation or an external and intentional source. The SIP may be zero, indicating that any open f

the pressure at a datum when the well is not flowing. The shut in pressure is usually either surface shut-in pressure or bottom hole shut-in pressure.