Heat transfer prevention method for wellbore heating system
AssigneeAarbakke Innovation AS
InventorsHenning Hansen, Tarald Gudmestad
Life of this patent
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Abstract
A method for thermally insulating a power cable or other temperature sensitive equipment from a wellbore tool comprising a heater. The wellbore tool is deployed at an end of the power cable in a well. A flow restrictor is deployed in an annular space between the heater and a wellbore tubular. The heater is axially spaced apart from the power cable such that the heater is disposed on one side of the flow restrictor and a connection to the power cable is disposed on another side of the flow restrictor. A thermal insulator is introduced into the annular space on the one side of the flow restrictor and the heater is operated.
Claims13
A method for thermally insulating a power cable or other temperature sensitive equipment from a wellbore tool comprising a heater, the wellbore tool deployed at an end of the power cable in a well, comprising:
- deploying a flow restrictor in an annular space between the heater and a wellbore tubular, the heater axially spaced apart from the power cable such that the heater is disposed on one side of the flow restrictor and a connection to the power cable is disposed on another side of the flow restrictor;
- introducing a thermal insulator into the annular space on the one side of the flow restrictor;
- and
- operating the heater.
A wellbore heating system, comprising:
- a wellbore tool comprising a heater coupled to one end of a spacer, the spacer comprising thermally insulating material therein;
- a radially expandable flow restrictor disposed on the spacer;
- an electrical cable or other temperature sensitive equipment connected to another end of the spacer;
- and
- wherein the flow restrictor is expandable to close an annular space between the spacer and a wellbore tubular, the electrical cable comprising a conduit therewith having an outlet disposed on a side of the flow restrictor opposite to a side on which the electrical cable is connected, the spacer comprising a bypass conduit having a port on each side of the flow restrictor.
Dependencies are inferred from the claim text.