Compact cable suspended pumping system for lubricator deployment

A method of retrieving a pumping system from a live wellbore, comprising:

• engaging an upper seal of a lubricator with a deployment cable;
• connecting the lubricator to a production tree of the live wellbore;
• deploying a running tool into the tree using the deployment cable;
• engaging the running tool with a hanger of the pumping system;
• raising the running tool and pump hanger into the lubricator;
• engaging a lower seal of the lubricator with a pump cable of the pumping system;
• disengaging the upper seal from the deployment cable;
• raising the running tool and pump hanger out of the lubricator;
• engaging the upper seal with the pump cable;
• disengaging the lower seal from the pump cable;
• raising downhole components of the pumping system into the lubricator;
• closing a valve of the lubricator;
• disengaging the upper seal from the pump cable;
• and
• raising the downhole components out of the lubricator.

A method of retrofitting a production tree for compatibility with a pumping system, comprising:

• connecting a marine riser to a production tree of the wellbore;
• retrieving a first production tubing hanger from the tree through the riser;
• replacing the first tubing hanger with a second tubing hanger having an electrical interface disposed along an inner surface thereof;
• installing an electric submersible pump assembly (ESP) into the tree and the wellbore, wherein a pump hanger of the ESP engages the electrical interface;
• and
• operating the ESP by supplying electricity from the tree to a pump cable of the pumping system via the electrical interface.

A pumping system, comprising:

• a submersible high speed electric motor operable to rotate a drive shaft;
• a high speed pump rotationally connected to the drive shaft and comprising a rotor having one or more helicoidal vanes;
• an isolation device operable to expand into engagement with a production tubing string, thereby fluidly isolating an inlet of the pump from an outlet of the pump and rotationally connecting the motor and the pump to the casing string;
• a cable having two or less conductors and a strength sufficient to support the motor, the pump, the isolation device, and a power conversion module (PCM);
• and
• the PCM operable to receive a DC power signal from the cable, and supply a second power signal to the motor.

A submersible pump having one or more stages, each stage comprising:

• a tubular housing;
• a mandrel disposed in the housing and comprising:
• a rotor rotatable relative to the housing and having:
• an impeller portion,
• a shaft portion, and
• one or more helicoidal vanes extending along the impeller portion, and
• a diffuser:
• connected to the housing,
• having the shaft portion extending therethrough, and
• having one or more vanes operable to negate swirl imparted to fluid pumped through the impeller portion;
• and
• a fluid passage formed between the housing and the mandrel and having a nozzle section, a throat section, and a diffuser section.

A subsea production tree, comprising:

• a head having a bore therethrough and a production passage formed through a wall thereof;
• a wellhead connector;
• and
• a production tubing hanger oriented within and fastened to the head and having:
• an outer electrical interface providing electrical communication between the head and the tubing hanger,
• an inner electrical interface for providing electrical communication with a pump hanger of an electric submersible pump assembly,
• one or more leads extending between the interfaces,
• a bore therethrough, and
• a production passage formed through a wall thereof, wherein the tubing hanger is oriented so that the tubing hanger production passage is aligned with the head production passage.