a device placed on a piece of equipment that is lowered into a wellbore so that the equipment may be retrieved by wire line.

Related Terms

• Dead Man

a piece of wood or concrete, usually buried, to which a wire guy line is attached for bracing a mast or tower....

• Wire Rope

a cable composed of steel wires twisted around a central core of fiber or steel wire to create a rope of great strength and considerable flexibility. Wire rope is used as drilling line (in rotary and cable-tool rigs), coring line, servicing line, winch line, and so on. It is often called cable or wireline; however,...

• Go-devil

1. a device that is inserted into a pipeline for the purpose of cleaning; a line scraper. Also called a pig. 2. a device that is lowered into the borehole of a well for various purposes such as enclosing surveying instruments, detonating instruments, and the like....

• Packer

a piece of downhole equipment, consisting of a sealing device, a holding or setting device, and an inside passage for fluids, used to block the flow of fluids through the annular space between the tubing and the wall of the wellbore by sealing off the space between them. It is usually made up in the...

• Umbilical

1. Any of various external electrical lines or fluid tubes which connects one portion of a system to another. 2. A control line attached to a remove piece of equipment, usually a subsea wellhead, to provide hydraulic or electrical control, or inject small amounts of chemicals....