Modular downhole multiphase pump
OwnerPradeep Dassinventor
Life of this patent
Estimating the term…
Abstract
A modular downhole pump includes a gear module for transferring power to the pump from a sucker rod or a downhole motor and a rotor module. The rotor module includes a pair of counter-rotating, interleaved rotors split into an upper pair and a lower pair which pump fluids in opposite directions within the rotor module. The rotor modules may be configured to increase the pressure capacity or the volume capacity of the pump and may be connected in series to achieve the desired volume and pressure output.
Claims10
A modular pump for underground use in connection with an oil well, said pump comprising:
- a) a rotor module comprising:
- i) a cylindrical housing having a bottom face, a top face, a cylindrical face, an inlet, an outlet and an internal rotor enclosure between said inlet and outlet;
- ii) an upper pair of intertwined and counter-rotating rotors and a lower pair of intertwined and counter-rotating rotors within the internal rotor enclosure, the upper pair of rotors and the lower pair of rotors being separated by an intake plenum wherein the upper pair of rotors drives fluid upwards into an outlet plenum and the lower pair of rotors drives fluid downwards into a fluid passage which then joins the outlet plenum;
- iii) means for rotating the rotors;
- and
- b) a gear module having means for connecting to the drive source and means for outputting power to the rotor module.
A rotor module for use in assembling a modular pump for underground use in connection with an oil well, said rotor housing comprising a cylindrical housing having an upper surface, a cylindrical surface, a bottom surface and defining an internal rotor enclosure characterized in that:
- an upper pair of intertwined and counter-rotating rotors and a lower pair of intertwined and counter-rotating rotors being positioned within the internal rotor enclosure, the upper pair of rotors and the lower pair of rotors being separated by an intake plenum wherein the upper pair of rotors drives fluid upwards into an outlet plenum and the lower pair of rotors drives fluid downwards into a fluid passage which then joins the outlet plenum
- the bottom surface defines an fluid intake opening that is in fluid communication with the intake plenum and a bypass opening;
- the cylindrical surface defines lateral intake openings that are in fluid communication with the intake plenum;
- and
- the upper surface defines a bypass outlet opening and a fluid outlet opening, the fluid outlet opening being in fluid communications with the outlet plenum;
- wherein each of the openings communicates with the rotor enclosure and some of the openings may be plugged while others are kept open to control the flowpath of fluid into and out of the housing such that two or more modules may be connected in series to increase the pressure and/or volume capacity of the pump.
Dependencies are inferred from the claim text.