دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a type of bit in which three cone-shaped cutting devices are mounted in such a way that they intermesh and rotate together as the bit drills. The bit body may be fitted with nozzles, or jets, through which the drilling fluid is discharged.

n: A kind of cone bit, which fixed three conical cone.

n: a liquid chemical used in gas processing to remove water from the gas. See glycol, glycol dehydrator.

n: one of a class of extinct Paleozoic arthropods.

n: 1. the difference between fore and aft draft readings on a marine vessel or an offshore drilling rig. 2. the use of special corrosion-resistant metals in blowout preventers, valves, and other oilfield devices to minimize the effects of hydrogen sulfide. v: 1. to minimize the difference between fore and aft readings. 2. to install H2S corrosionresistant materials in oilfield equipment used in H2S environments.

n: a correction applied to cargo ullages when the vessel is not on an even keel. Valid only when liquid completely covers the tank bottom and is not in contact with the underside of the deck.

n: the stem on the end of a core thief that can be bumped or tapped to close and thus catch a sample in the thief.

n: the operation of hoisting the drill stem from and returning it to the wellbore. v: shortened form of make a trip." See make a trip, overspeed governor.

n: The complete operation of removing the drillstring from the wellbore and running it back in the hole. This operation is typically undertaken when the bit becomes dull or broken, and no longer drills the rock efficiently.


pulling all pipe from the well and rerunning the pipe to bottom.

n: The slight gas of wellbore come from layer when trip in .

gas that enters the wellbore during a trip of the drilling string. May be due to swabbing and/or lowering the mud equivalent circulating density during pump shutdowns.

v: to go in the hole.

n: To run drillstring back in the hole.

run in the hole with tubing or drill pipe.

n: the small amount of additional mud weight carried over that needed to balance formation pressure to overcome the pressure-reduction effects caused by swabbing when a trip out of the hole is made.

any mud density over the amount needed to balance the formation with a static mud column. Related to overbalance.