Double-stator single-rotor screw motor consubstantial pump

Abstract

The invention relates to the field of machines, and particularly discloses a double-stator single-rotor screw motor consubstantial pump, comprising a tubular outer stator with inner spiral and a rotor arranged in the outer stator, wherein the rotor is internally provided with an inner stator with outer spiral; the outer surface of the rotor is provided with outer spiral and the inner surface thereof is provided with inner spiral, wherein the ratio of the spiral head numbers on the contact surface of the outer stator to the rotor is N:N+1, the ratio of the spiral head numbers on the contact surface of the rotor to the inner stator is N:N-1 and N is more than or equal to 2. The scheme uses a spiral channel between the rotor and the inner stator to form hydraulic power output, uses a spiral channel between the rotor and the outer stator to form a liquid absorbing loop, thus leading the double-stator single-rotor screw motor consubstantial pump to have functions of power output and liquidabsorption simultaneously, and finishes two types of operation by one time. The scheme has better sand prevention capability and stronger adaptability for sand, wax, gas, water and scale contained information fluid, thus being capable of reducing the frequency of maintenance and repair and leading the development cost of an oil field to be greatly reduced.

Description

technical field [0001] The invention relates to the mechanical field, in particular to a power device that uses liquid pressure to simultaneously realize the motor driving function and the screw pump suction and discharge function. Background technique [0002] The screw drill is a power device powered by drilling fluid (mud, clean water) as the power medium. It is essentially an energy conversion device that converts liquid pressure energy into mechanical energy. The screw drill is generally composed of a bypass valve, a screw motor (rotor and stator), a universal joint, a bearing and a drive shaft, and its core is a screw motor. When the drilling fluid flows into the motor, a certain pressure difference is formed at the inlet and outlet of the motor, thereby pushing the rotor to rotate around the axis of the stator, and the speed and torque are transmitted to the drill bit through the cardan shaft and the transmission shaft, realizing the conversion of pressure energy into...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem of the single function of the screw drill in the prior art, this solution provides a double-stator single-rotor casing type screw drill

In order to solve the problem of the unreasonable angle of the high-pressure liquid nozzle of the stirring head in the prior art, this solution provides a stirring head that is connected with the screw drill and has both an injection port and an adsorption port

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