دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: old-style tap with longitudinal grooves across the threads. See tap, taper tap.

n: A usual fishing tool for fishing tubular goods dropping in the wellbore. There are thread and coning in the inner surface.

another name for a tapered tap. Used to screw into boxed of connections.

n: a record showing variations in wellbore diameter by depth, indicating undue enlargement due to caving in, washout, or other causes. The caliper log also reveals corrosion, scaling, or pitting inside tubular goods.

n: A tool run on wireline that measures the diameter of the wellbore. It may be used for detecting washouts, calculating cement volumes, or detecting internal corrosion of casing.

a recording of the diameter changes in a well made by a tool with mechanical arms that touch the wellbore or a sonic signal bouncing off the borehole wall.

n: a lubricant for the threads of oilfield tubular goods. v: to apply thread lubricant.

n: A generic term applied to all types of thread lubricants. For casing, tubing and line pipe use lubricants specified in API Bulletin 5A. For tool joints and drill collars less than 7 inches OD, use a thread lubricant containing not less than 40-60% by weig

pipe thread dope used to lubricate and seal the threaded connection.

n: 1. a short, heavy, cylindrical section of steel filled with concrete and rounded at the bottom, which is placed at the end of the casing string. It prevents the casing from snagging on irregularities in the borehole as it is lowered. A passage through the centre of the shoe allows drilling fluid to pass up into the casing while it is being lowered and allows cement to pass out during cementing operations. Also called casing shoe. 2. a device, similar to a casing shoe, placed at the end of other tubular goods.

n: a short cylindrical steel section placed at the bottom of acasing string.it is filled with concrete and rounded at the bottome to steer the casing past any irregularities in the borehole.

a short section of casing with a rounded nose of a drillable material and a port through the center to allow circulation.

n: an acid that has been chemically treated before the acidizing or acid fracture of a well to lessen its corrosive effect on the tubular goods and yet maintain its effectiveness. See acid fracture, acidize.

n: 1. the area of a partIy machined surface (as with grooves or indentation) that is left smooth.2. the area on a piston between the grooves into which the rings fit. v: to seat tubular goods (such as casing or tubing) into a special device designed to support them from the surface.

n: heat-treating applied to metal tubular goods to ensure uniformity of the grain structure of the metal.

oil country tubular goods.

n: the material of oil industry, it includes the tube, casing pipe and collar ect.