“Oil saver” means a pressure-sealing gland arrangement which is used to prevent the leakage and waste of gas, oil, or water around a wire line when servicing a well. It may be operated by mechanical or hydraulic means. [Mich. Admin. Code R 408 (2013)].
Source: Oil and Gas Drilling and Servicing Operations, Michigan Administrative Code R 408, February 8, 2013. Regulations
A device used in conjunction with a wire line in an oil or gas well to direct liquids and gases from such wells into desirable outlets.
Source: Petroleum Safety Orders–Drilling and Production, Definitions, California Code of Regulations, 8 CCR § 6505, December 2012. Regulations