18 July 2017

Sonic logging

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

Spear

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

Specific gravity

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

Spinner survey

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 […]