18 July 2017
A coring technique in which core samples are obtained from the hole wall in a zone that has already been drilled. A hollow bullet is fired […]
18 July 2017
A joint of drill pipe. Compare double, thribble, and fourble.
18 July 2017
Moving a rig from the location of a lost or completed hole preparatory to starting a new one. In skidding the rig, the move is accomplished […]
25 July 2017
Wedge-shaped pieces of metal with serrated inserts (dies) or other gripping elements, such as serrated buttons, that suspend the drill pipe or drill collars in the […]
18 July 2017
Before hoisting the drill stem from the hole, it is desirable to pump in to the top of the drill stem a quantity of very heavy […]
18 July 2017
1) in drilling, a plastic mixture of cement and water that is pumped into a well to harden. There it supports the casing and provides a […]
18 July 2017
Now commonly used as mud pit. Originally it was the pit in which clay and shale cuttings used to mix mud were stored.
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.
