A breakaway safety valve comprising interengageable plug and socket components having a fluid flow passage therethrough, and a plurality of breakaway members holding the plug and socket components in

A tank safety valve which is used to seal off fluid or gas flow from the tank when an accident occurs. If the tank is damaged, such as by accidentally dropping the tank, it is most likely that the val

A safety valve is adapted to fit into the stem of a conventional service valve of a high pressure gas cylinder to prevent the escape of gas when the external part of the service valve is broken off. A

A safety valve and pump apparatus has an electric pump, a safety valve, a packing means, a continuous length of tubing extending from the surface to the location of the safety valve and pump, a contro

An electric safety valve actuator for a surface controlled subsurface safety valve. The actuator includes a motor drive and driver selectively coupled with a drive yoke connected to an otherwise conve

In a preferred embodiment of the invention, an accessory safety valve is provided for mounting within outlet-ports of tanks designed to contain pressurized gas of some sort, particularly of an explosi

A hydraulic valve operating circuit for providing positive opening and closing of a downhole safety valve includes shut-off valves which prevent leakage of fuel to the outside environment if a leak sh

A pressure actuated and resettable safety valve for controlling the flow through a well conduit which closes in response to an increase in pressure in the well conduit. Resetting means for opening the