دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a fishing tool that is attached to tubing or drill pipe and lowered over the outside wall of pipe or sucker rods lost or stuck in the wellbore. A friction de- vice in the overshot, usually either a basket or a spiral grapple, firmly grips the pipe, allowing the fish to be pulled from the hole.

n: a fishing tool that is attached to the drill pipe and is lowered over the fish and engages externally. An overshot can also be used to recover a wireline survey tool (single shot).

a fishing tool designed to slip over the fish and grasp the outside.

n: a general tenn often used to refer to any type of log being run in a well.

n: A continuous measurement of formation properties with electrically powered instruments to infer properties and make decisions about drilling and production operations. The record of the measurements, typically a long strip of paper, is also called a log.