25 July 2017


International Association of Drilling Contractors. IADC has exclusively represented the worldwide oil and gas drilling industry since 1940. IADC is a membership organization that represents companies […]
18 July 2017


In machinery an idler pulley or sprocket is used in connection with belt drive and chain drive respectively to maintain desired tension on the belt or […]
18 July 2017


Preventing the passage of fluid. A formation may be porous yet impermeable if there is an absence of connecting passages between the voids within it. See […]
18 July 2017


The trade name of an instrument used to determine whether or not the well bore is proceeding in a vertical orientation at any point. In most […]