دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

a device used to catch debris in the wellbore. Often a part of the string.

an isotope tracer in a bead with the same density of the flowing fluid that is used to track fluid flow rates and therefore fluid entry and exit points along the wellbore.

n: a short cylindrical device installed in the drill stem between the bottom most drill collar and a downhole motor. Its purpose is to deflect the downhole motor off vertical to drill a directional hole. See drill stem.

a short section of a tool or pipe that is formed at an angle or is modified downhole by a motor to assist in entering deviated wellbores or drilling off the path of the wellbore.

n: a report that lists each bit used during a drilling operation, giving the type, the footage it drilled. the formation it penetrated, its condition, and so on.

a record of bit run, depth, rate of penetration, etc., in a wellbore.

any portion of the wellhead or tree that contains wellbore pressure.

n: a thick-walled container, usually steel, used to hold devices that determine and record pressure or temperature in a wellbore. See bonomhole pressure.

a thick walled pressure container of pressure measuring instruments or a sample container.

n: 1. the inside diameter of a pipe or a drilled hole. 2. the diameter of the cylinder of an engine. v: to penetrate or pierce with a rotary tool. Compare tunnel.

n: Refers to the cylinder liner of pipe or internal diameter of wellbore.

the inside diameter of a tool or pipe.

n: a hole made by drilling or boring;a wellbore.

n: The hole made by the drill bit.

the drilled hole.

n: an effect that occurs when certain shale zones are penetrated by the wellbore and the pressure exerted by the drilling mud exceeds the pressure exerted by the shale. The pressure differential causes the borehole to flex, or balloon, and the borehole no longer behaves as a fixed, rigid cylinder.

n: The diameter of the drilled wellbore. The borehole diameter can change greatly even the same bit due to the change of formation lithology and formation collapse.