Abstract: The invention relates a combined liquid level and pressure regulator for separators, comprising a liquid level sensing float connected through a rigid vertical shaft with two discharge cross section controlling valves. The essence of the invention is that the discharge cross section controlling valves are pressure-compensated slide valves arranged so as to control the discharge cross sections of the gas outlet and the liquid outlet of the separator.

Abstract: An apparatus is disclosed for the continuous and reliable measurement of the yield of oil wells. The fluid from the well, consisting of mixture of oil and gas, is directed into a two-phase separator having separate outlets for gas and liquid. Within the separator, or in direct communication therewith, is a combined liquid level and pressure regulator, which comprises a float supported by the liquid, and upper and lower pressure-compensated slide valves directly mechanically connected to the float and movable vertically therewith, simultaneously progressively closing one outlet while progressively opening the other. Downstream of the pressure-compensated slide valves there are separate yield-measuring devices for the oil and gas output, and further downstream is a mixture, where the components are recombined and thoroughly mixed. A water content meter can also be provided in the flow path for the separated liquid.