دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a drilling bit with cutting edges of hard alloys. Developed about 1900, and first used with the rotary system of drilling, it is still useful . drilling very soft formations. Also called drag bit

n: the balde bit whose wings shape seem like fish tail

a drag bit with no moving parts, rotated like a conventional metal drilling bit.

n: a small, often standardised, part (such as a coupling, valve, or gauge) installed in a larger apparatus.

formation isolation valve. A downhole valve that is operated by pressure cycling or other remote method.

n: a clearance pocket that, when open, adds a specific volume to a compressor cylinder.

n pi: costs that do not vary with the level of operation or units produced or sold. Examples are land costs, depreciation. and license fees.

n: 1. a piece of cloth. rope. or nylon strand used to mart the wireline when swabbing or bailing. 2. an indicator of wind direction used during drilling or workover operations where hydrogen sulphide (sour) gas may be encountered. v:1. to signal or attract attention.2. in swabbing or bailing. to attach a piece of cloth to the wireline to enable the operator to estimate the position of the swab or bailer in the well.

n: the fibaric belt or rope binded on the cable during pumping or fishing


marking the pipe or wireline with a paint stripe.

n: a projecting rim or edge (as on pipe fittings and openings in pumps and vessels),usually drilled with holes to allow bolting to other flanged fittings.

a common, high pressure wellhead connection, using bolt attached flange plates and metal-to-metal seals.