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US 10,240,406 B2Granted
Dual-walled running string for electric devices with power transmission through running string
AssigneeBaker Hughes, A Ge Company, LLC
InventorsSilviu Livescu, Thomas J. Watkins, Richard Snow, Geoffrey Presley
Life of this patent
Estimating the term…
Abstract
Arrangements for transmitting electrical operating power to a downhole electrically operated tool via a dual-walled conductive running string.
Claims17
An arrangement for operating a downhole electrically operated tool in a subterranean location within a wellbore, the arrangement comprising:
- a downhole electrically operated tool;
- a conductive dual-walled running string affixed to the downhole electrically operated tool for disposing the electrically operated tool into the wellbore, the dual-walled running string being made up of an outer coiled tubing string and an inner coiled tubing string which is disposed radially within the outer coiled tubing string;
- an electric power source located at surface and operably connected with the dual-walled running string to transmit electric power through the dual-walled running string;
- the downhole electrically operated tool being powered by electric operating power that is transmitted through at least the inner tubing string of the dual-walled running string;
- one or more electric power phase converters for converting electric power between single phase electric power and multiple-phase electric power;
- a first conductor which extends from an inner coiled tubing string of the dual-walled coiled tubing running string to the electrically operated tool;
- a second conductor which extends from the outer coiled tubing string to the electrically operated tool;
- and
- wherein at least one of the one more electric power phase converters is operably interconnected with both of the first and second conductors.
6 more elements
An electric submersible pump production assembly for use in pumping fluid from a subterranean location within a wellbore, the production arrangement comprising:
- a electric submersible pump assembly having an electrically powered motor section;
- a dual-walled coiled tubing running string affixed to the electric submersible pump for disposing the electric submersible pump into the wellbore;
- an electric power source located at surface operably connected with the dual-walled coiled tubing string to transmit electric operating power through inner and outer tubing strings of the dual-walled coiled tubing string via skin effect;
- the motor section of the electric submersible pump being powered by electric power that is transmitted through the inner and/or outer tubing strings;
- one or more electric power phase converters for converting electric power between single phase electric power and multiple-phase electric power;
- a first conductor which extends from an inner coiled tubing string of the dual-walled coiled tubing running string to the motor section;
- a second conductor which extends from the outer coiled tubing string to the motor section;
- and
- wherein at least one of the one more electric power phase converters is operably interconnected with both of the first and second conductors.
6 more elements
A method for operating a downhole electrically operated device at a subterranean location within a wellbore, the wellbore extending downwardly from a surface of the earth, the method comprising the steps of:
- running the downhole electrically operated device into a wellbore with a dual-walled running string to the subterranean location;
- transmitting electric operating power from an electric power source at the surface to the downhole electrically operated device through the dual-walled running string;
- the downhole electrically operated device being powered by electric power that is transmitted through inner and outer tubing strings of the dual-walled running string via skin effect;
- converting electric power transmitted from the electric power source to the dual-walled running string between multiple phase to single phase electric power with an electric power phase converter;
- wherein electric power is transmitted between the inner coiled tubing string and the electric power phase converter via a first conductor;
- and
- electric power is transmitted between the outer coiled tubing string and the electric power phase converter via a second conductor.
4 more elements
Dependencies are inferred from the claim text.