دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: A string of drillpipe that consists of two or more sizes or weights.

n: 1. a condition wherein the hole diameter narrows with depth owing to wear on the bit gauge caused by drilling abrasive formations. 2. a wellbore whose diameter is larger near the surface than near the bottom.

n: wells top hole diameter larger than lower hole, because bits diameter be grinded in drilling process.

a mill with a gradual concave or convex taper designed to enlarge the wellbore.

n: drill pipe, tubing, sucker rods, and so forth with the diameter near the top of the well larger than the diameter below.

n: A string of drillpipe or casing that consists of two or more sizes or weights.

a tubing string with more than one tubing size. Normally the smallest pipe is on bottom with larger sizes toward the top. The sizes are set to minimize flowing friction and keep the velocity above the critical level to lift fluid.

n: in pipeline construction, a machine that moves along the pipe, wrapping joints with tape in overlapping segments.

abbr: Trans-Alaska Pipeline System.

trans Alaska pipeline system.

a deposit of very long carbon chain alkanes. May be associated with asphaltenes.

n: a sandstone that contains chiefly heavy, tarlike hydrocarbons. Tar sands are difficult to produce by ordinary methods;thus it is costly to obtain usable hydrocarbons from them.