Dual gearbox electric submersible pump assembly

An electric submersible pump assembly for producing a fluid from a production zone to a surface, comprising:

• an electric submersible motor:
• a progressive cavity pump disposed above a lower packer and having a section head and intake tubing to receive the fluid from the production zone;
• a second pump disposed below an upper packer and having production tubing and an intake section to receive the fluid from the progressive cavity pump;
• a first motor interface that connects the electric submersible motor to the progressive cavity pump:
• and
• a second motor interface that connects the electric submersible motor to the second pump, each of the first and second motor interfaces comprising:
• a gearbox connected to the electric submersible motor;
• a flex shaft connected to the pump and to transfer torque to the pump;
• and a seal section that joins the flex shaft to the gearbox.

An electric submersible pump assembly for producing a fluid from a production zone to a surface, comprising:

• a first pump having a section head such that the fluid enters from the production zone through the first pump;
• a second pump having an intake section such that the fluid enters from the first pump and is discharged through the second pump;
• and
• an encapsulated device in fluid communication with the surface comprising:
• an electric submersible motor;
• a first motor interface that connects the electric submersible motor to the first pump;
• and
• a second motor interface that connects the electric submersible motor to the second pump, each motor interface comprising:
• gearbox that connects to the electric submersible motor;
• a pump shaft connector that connects to the pump;
• and
• a seal section that joins the pump shaft connector to the gearbox.

An electric submersible pump assembly for producing a fluid from a production zone to a surface, comprising:

• a first rotary pump having a section head such that the fluid enters from the production zone through the first rotary pump;
• a second rotary pump having an intake section such that the fluid enters from the first rotary pump and is discharged through the second pump;
• an electric submersible motor;
• a first motor interface that connects the electric submersible motor to the first pump;
• and
• a second motor interface that connects the electric submersible motor to the second rotary pump, each motor interface comprising:
• a gearbox that connects to the electric submersible motor;
• a pump shaft connector that connects to the rotary pump;
• and
• a seal section that joins the pump shaft connector to the gearbox.

An electric submersible pump assembly for producing a fluid from a production zone to a surface comprising:

• an electric submersible motor:
• a first rotary pump disposed above a lower packer and having a section head and intake tubing to receive the fluid from the production zone:
• a second rotary pump disposed below an upper packer and having production tubing and an intake section to receive the fluid from the first rotary pump;
• a first motor interface that connects the electric submersible motor to the rotary pump, and
• a second motor interface that connects the electric submersible motor to the second pump, each of the first and second motor interfaces comprising:
• a gearbox connected to the electric submersible motor, a flex shaft connected to the pump and to transfer torque to the pump, and a seal section that joins the flex shaft to the gearbox.

A method for producing fluid from a production zone to a surface using an electric submersible pump assembly, the method comprising:

• disposing into a wellbore the electric submersible pump assembly that includes a first pump, a second pump, and a motor that drives the first and second pump via first and second gearboxes
• pumping the fluid from the production zone toward the second pump using the first pump:
• and
• pumping the fluid to the surface using the second pump.