دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

clay mineral used in drilling fluid. Like attapulgite, it creates viscosity by mechanical interference with the clay particles rather by electrochemical forces.

n: a time switch d1at starts motors in sequence after a power out- age or shutdown. It prevents excessive voltage drop, which would occur if several motors were started simultaneously.

n: a circuit that has several electrical devices connected to form a single path for the electric current. The current is the same throughout the circuit;the total voltage is the sum of the voltages across each of the elements of the circuit.

n: an ocean currents direction of motion. v: to harden;for example, when cement sets, it hardens.

v: to place stands of drill pipe and drill collars in a vertical position to one side of the rotary table in the derrick or mast of a drilling or workover rig. Compare lay down pipe.

v: The work of arranging orderly the thribble orderly in the pipe setback when
pulling out the hole.



pulling tubing and stand back in the vertical racks on the rig.

n: a pit that is dug in the earth for the purpose of receiving mud returned from the well and allowing the solids in the mud to settle out. Steel mud tanks are more often used today, along with various auxiliary equipment for controlling solids quickly and efficiently.

n: A drilling mud filled open steel or earthen berm tank that is not stirred or circulated. By having mud slowly pass through such a container, most large drilling solids sink to the bottom, cleaning the mud somewhat. If the settling pit is small, as in the

n: 1. the steel mud tank in which solid material in mud is allowed to settle out by gravity. It is used only in special situations today, for solids control equipment has superseded such a tank in most cases. Sometimes called a settling pit. 2. a cylindrical vessel on a lease into which produced emulsion is piped and in which water in the emulsion is allowed to settle out of the oil.

n: A drilling mud filled open steel or earthen berm tank that is not stirred or circulated. By having mud slowly pass through such a container, most large drilling solids sink to the bottom, cleaning the mud somewhat. If the settling pit is small, as in the

a surface vessel where solids are allowed to settle out of a produced or circulated fluid stream.

n: shortened form of shale shaker. See shale shake!:

n: The primary and probably most important device on the rig for removing drilled solids from the mud. This vibrating sieve is simple in concept, but a bit more complicated to use efficiently. A wire-cloth screen vibrates while the drilling fluid flows on to

a piece of drilling equipment, usually with a vibrating screen, where drill cuttings are removed from the flowing mud.

n: a series of trays with virbrating screens that allow the mud to pass through but retain the cuttings. The mesh must be chosen carefully to match the size of the solids in the mud.

a solids separation piece of equipment on a drilling rig that uses vibrating screens to remove solids from the returning mud.