18 July 2017
The recording of the time required for a sound wave to travel a specific distance through a formation. Difference in observed travel times is largely caused […]
18 July 2017
A fishing tool used to retrieve pipe lost in a well. The spear is lowered down the hole and into the lost pipe. When weight, torque, […]
25 July 2017
The ratio of the weight of a given volume of a substance at a given temperature to the weight of an equal volume of a standard […]
18 July 2017
An operation designed to indicate the point at which fluids are escaping from the wellbore into a cavernous or porous formation. Also used to determine point […]
18 July 2017
A spool attachment on the makeup cathead to permit use of a spinning chain to spin up or make up drill pipe. See spinning chain.
18 July 2017
A Y-shaped chain used to spin up (tighten) one joint of drill pipe into another. One end of the chain is attached to the tongs, another […]
18 July 2017
A flanged joint with side outlets, also serving as a spacer, between rams in a blowout preventer stack or between stack and casinghead.
18 July 2017
1) to move the drill stem up and down in the hole over a short distance without rotation. Careless execution of this operations creates pressure surges […]
18 July 2017
To begin drilling; to start the hole.
18 July 2017
The forcing of cement slurry by pressure to specified points in a well to cause seals at the points of squeeze. It is a secondary cementing […]
18 July 2017
To guide the end of a pipe into a coupling or tool joint when making up a connection.
18 July 2017
A temporary platform erected in the derrick or mast some 20 to 40 ft (6-12 m) above the derrick floor. The derrickman or another crew member […]
