دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

v: to pass from one point throughout a system and back to me starting point. For example, drilling fluid is circulated out of the suction pit, down the drill pipe and drill collars, out the bit, up the annulus, and back to the pits while drilling proceeds.

v: To cycle drilling fluid through the drill string and wellbore, returning to the mud pits. This operation is carried out during drilling and is also used to condition the mud while drilling is suspended.

establishing flow down the tubing or drill pipe and up the annulus. Reverse circulating involves injecting down the annulus and up the drill pipe.

n: the movement of drilling fluid out of the mud pits, down the drill stem, up the annulus, and back to the mud pits. See normal circulation, reverse circulation.

n: The movement of drilling fluid through the flow system on a drilling or workover rig. This circulation starts at the suction pit and goes through the mud pump, drill pipe, bit, annular space in the hole, flowline, fluid pits, and back again to the suction

n: a powerful magnet placed in the return line between the wellbore and the mud pit to remove metal particles from the drilling mud. A ditch magnet is often used during milling operations.

n: A device used to aspirate the iron fillings and powers from the drill fluid when corrode or washover the junk

n pi: the appearance of the surface of the mud in a mud pit when dry polymer fails to dissolve fully in the mud.

n: a railing for guarding against danger or trespass. On a drilling or workover rig, for example, guardrails are used on the rig floor to prevent persons from falling;guardrails are also installed on the mud pits and other high areas where there is any danger of falling.

n: 1. a hydraulic device operated by a centrifugal pump used to clean the mud pits, or tanks, and to mix mud components.2. in a perforating gun using shaped charges, a highly penetrating, fast-moving stream of exploded particles that forms a hole in the casing, cement, and formation.

n: To drill soft, unconsolidated, usually shallow formations by eroding the rock below the bit by hydraulic impact loading alone. Though not as common as in the past, a bit may be fitted with asymmetric nozzles, one large and two or more small nozzles. If

n: a device that shoots a jet of drilling mud under high pressure into the mud pit to mix additives with the mud or to agitate the mud.

n: a pipe that shoot a jet of drilling fluid under high pressure into the mud pit to agitate the mud or mix in additives.

n: originally, an open pit dug in the ground to hold drilling fluid or waste materials discarded after the treatment of drilling mud. For some drilling operations, mud pits are used for suction to the mud pumps, settling of mud sediments, and storage of reserve mud. Steel tanks are much more commonly used for these purposes now, but they are still usually referred to as pits, except offshore, where mud tanks" is preferred.

the primary storage tank for drilling mud.

the indicator system that reports the level of mud in the tank. Useful for losses and kick indications.