the gas pressure valve gravitation forces the oil downwards thus generating the important application_number US 3021301 A description as mention the main objective by this invention is to make submersible pumps applicable for oil production in oil reservoirs where mixtures of oil and gas are present especially when reservoir or well head pressure is low referring to fig1 this is accomplished by the use of an gravitational separator allowing oil to aggregate at the bottom of a outer tubing 10 a mixture of oil and gas flows trough perforations 2 into a ring space 3 the gas pressure in the ring space 3 is measured with the pressure meter 8 and is regulated by the valve 4 the pressure in the ring space 3 is regulated to be much lower than in the reservoir 1 this creates a pressure drop of the mixture as it enters the ring space 3 thus turbulence is created gravity acts upon this turbulent mixture and tries to force it downwards due to the pressure drop gas is allowed to expand and in addition due to the turbulent flow most of the gas will immediately escape from the oil towards the valve 4 further affected by the turbulence the reminding gas will gather as.