A tower-like load-bearing structure, usually of bolted construction. In drilling, the standard derrick has four legs standing at the corners of the substructure and reaching to the crown block. The substructure is an assembly of heavy beams used to elevate the derrick and provide space to install blowout preventers, casingheads, etc. Because the standard derrick must be assembled piece by piece, it has largely been replaced by the mast, which can be lowered and raised without disassembly. The derrick is used to raise and lower equipment (pipe, casing, etc.) used in the drilling and testing of a well.
An apparatus for lifting and moving heavy weights. It is similar to the crane; but differs from it in having the boom, which corresponds to the jib of the crane, pivoted at the lower end so that it may take different inclinations.
a boom or spar used for cargo handling; pivoted at one end to a mast or strong point on deck, the free end can be swung and lifted using a combination of wire ropes, winches and blocks to hoist or lower cargo
A derrick is a lifting device composed of one mast or pole which is hinged freely at the bottom. It is controlled by (usually 4) lines powered by some such means as man-hauling or motors, so that the pole can move in all 4 directions. A line runs up it and over its top with a hook on the end, like with a crane.
Derrick is a famous German TV series produced by Telenova Film- und Fernsehproduktion in association with ZDF, ORF and SRG between 1974 and 1998 about Detective Chief Inspector (Oberinspektor) Stephan Derrick (Horst Tappert) and his loyal assistant Inspector (Kriminalhauptmeister) Harry Klein (Fritz Wepper), who solve murder cases in Munich and surroundings (with only three unsolved cases).