دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the section of reduced cross-sectional area at the top and/or rottom of an open tank prover. It has visible graduations to enable measuring small volumes.

n: an open tank: prover with one or two graduated necks. See graduated neck.

n: the phenomenon that diamand burned out or softened because of overheated caused by scarce delivery capacity of drill fluid versized drill pressure when adamantine drill working under the bottom of well。

n: a mechanism that is fitted into an overshot to grasp and retrieve fish from the borehole. The interior of a grapple is wickered to engage the fish. See basket grapple. spiral grapple.

n: the part of a catching tool (such as overshot or spear) that engages the fish.

a spring like device, resembling a interlocking finger puzzle that allows a round work piece to slide through the ID when in compression, but grips the work piece (or fish) when a tension load is applied. Common in overshot fishing devices.

a device that measures gravity changes over a specific area.

n: an exploration method in which an instrument that measures the intensity of the earths gravity is passed over the surface or through the water. In places where the instrument detects stronger-or weaker-than-normal gravity forces. a geologic structure containing hydrocarbons may exist.

a exploration method that uses an instrument to measure the intensity of the earth’s gravity. Areas with unusual readings may indicate traps or structures that could contain hydrocarbons.

n: 1. the depression in a sheave (pulley) into which wire rope seats as the wire rope moves over the sheave. 2. on a draw- works drum, one of several depressions on the surface of the drum around which the wire rope drilling line is wrapped. The grooves keep the wire rope from wrapping unevenly across the drum.

n: the interior capacity of a ship or a mobile offshore drilling unit. The capacity is expressed in tons, although the actual measurement is in volume, 1 ton being equivalent to 100 cubic feet of volume. This rule holds for measuring ship capacity for US maritime purposes. All principal maritime governments have their own rules describing how tonnage is to be measured.

n: a workinginterest owners total ownership in production, before deduction of related royalty, overriding royalty, or production payment interests.

n: a wireline sheave, or pulley, that is fastened to the ground anchor and that changes a horizontal pull on a wireline to a vertical pull (as in swabbing with a derrick over a well). See block.

n: wire rope idle wheel attached to anchorage block is use to change the horizontal pull of wire rope as vertical pull 。