18 July 2017
A void; an absence of matter of any kind. Complete vacuum is not attained, but a partial vacuum or reduction in pressure through suction is achieved […]
18 July 2017
A device used to control the rate of flow in a line to open or shut off a line completely, or to serve as an automatic […]
18 July 2017
A term used to describe a product which is not susceptible to the action of gases or other vapors. Its principal application on a drilling rig […]
25 July 2017
A measure of a liquid’s resistance to flow. The viscosity of petroleum products or mud is usually expressed and measured by the time it takes for […]