دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a fishing tool designed to grab casing from the inside so that when the spear is retrieved, the attached casing comes with it.

n: A kind of tool for fishing casing.

n: A kind of fishing tool by chucking the neck of junk in the wellbore when fishing.

n: See core picker.

n: the name used for the working platform of the derrickhand (the monkeyboard) when it is located at a height in the derrick or mast equal to two lengths of pipe joined together. Compare fourble board, thribble board.

n: the platform on which the grabber works


working platform for the derrickman on a drilling rig.

n: in sampling petroleum and petroleum products, a small sample, usually 1.5 millilitres (0.05 ounce),obtained by the probe and sampler in an automatic sampling system. Several grabs constitute a sample. graben n: a block of the earths crust that has slid downward between two faults. Compare horst.

n: sample obtained by collecting loose solids in equal quantities from each part or package of a shipment and in sufficient quantity to be characteristic of all sizes and components.

a block of the formation that has slid downward between two faults.