دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

v: to fill a tank completely with a liquid that has the same or greater density as the liquid that will normally be in the tank. Stressing the tank prior to strapping it ensures that the measurements will more accurately reflect the tanks true capacity.

a shallow zone of (usually) higher strength surrounding a perforation, cavity or the bore hole, caused by explosive effects or other pressure factors and possibly related to the mechanics of work hardening.

n: a notch or pit on a pipe or joint that raises the stress level and concentrates the breakdown of the metal structure. Also called a stress riser.

occurs in metal that is subject to both stress and a corrosive environment. May start at a “stress riser” like a wrench mark or packer slip mark.

controlled heating of material to predetermined temperature for the purpose of reducing any residual stresses.

n: see stress concentrator:

a disturbance in the metal structure caused by impact or a wrench mark or penetration of slips that is a likely location for increased corrosion or some failures such as hardening or local fatigue.

n: in crane operations, the permanent deformation of a wire rope or sling caused by the pull of a load too heavy for the rated load capacity of the rope or sling. A stretched rope or sling should be immediately removed from service. Also called elongation.

an exceptional outcome that a team will strive for but will probably not achieve.

n: a tool joint pin which has been subjected to loading which has caused permanent lengthening of the threaded length of the pin. This condition generally results from excessive torque rather than tensile loads.

n: The permanent extend of the external screw of tool joint,which usually because of the larger torque.

a group of roughly parallel marks.