دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the damage to outer edge tooth of bit cause the decrease of wellbore。

n: the outside surfaces of the outermost rows of teeth on a bit. They determine the diameter or gauge of the hole to be drilled.

n: exterior surface of the cone bit’s outermost tooth。It determine the diameter of wellbore。

using the formation data generated by a measurement while drilling system to assist in drilling a wellbore to a specific target in the formation.

n: abnormally high pressure exerted by some subsurface formations. The deeper the formation, the higher the pressure it exerts on a wellbore drilled into it.

n: The pressure within the Earth, or formation pressure. The common oilfield usage, however, is to indicate anomalous subsurface pore pressure that is higher or lower than the normal, predicted hydrostatic pressure for a given depth, or the pressure exerted

v: to lower the drill stem, the tubing, the casing, or the sucker rods into the wellbore.

n: the axial line of well bore diverge perpendicular line or wellbore
whose angle of inclination exceed regulated limit。

n: the assembly mounted on a coiled tubing injector head that guides the tubing string as it passes through an arc from the reel into a vertical alignment with the injector-head chains and wellbore. The radius of the guide arch is generally designed to be as

n: a mass of very fine gravel placed around a slotted liner in a wen. See gravel packing.

n: A sand-control method used to prevent production of formation sand. In gravel pack operations, a steel screen is placed in the wellbore and the surrounding annulus packed with prepared gravel of a specific size designed to prevent the passage of formation

a sand control completion that uses a larger gravel to stop the formation sand and a screen to stop the gravel.

n: a method of well completion in which a slotted or perforated liner, often wire-wrapped, is placed in the well and surrounded by gravel. If open hole, the well is sometimes enlarged by underreaming at the point where the gravel is packed. The mass of gravel excludes sand from the wellbore rot allows continued production.

v: to create holes in casing and cement set through a productive formation. A common method of completing a well is to set casing through the oil-bearing formation and cement it. A perforating gun is then lowered into the hole and fired to detonate high-powered jets or shoot steel projectiles (bullets) through the casing and cement and into the pay zone. The formation fluids flow out of the reservoir through the perforations and into the wellbore. See jetperforate, perforating gun.