Motor cooling radiators for use in downhole environments
AssigneeSchlumberger Technology Corporation
InventorsChen Tao, Thomas Meyer
Life of this patent
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Abstract
Example motor cooling radiators for use in downhole environments are disclosed. A disclosed example radiator comprises a cylindrical housing having an annular passageway. The housing defines an inlet at a first end of the housing and an outlet at a second opposite end of the housing. A channel is arranged within the annular passageway of the housing along a spiral path to transport the first liquid and to define a spiral flow passageway between the inlet and the outlet for the second liquid. In operation, the first liquid does not contact the second liquid and heat is transferred between the first and second liquids as the second liquid flows in the spiral passageway.
Claims19
A radiator to transfer heat between first and second liquids, comprising:
- a cylindrical housing having an annular passageway, the housing defining an inlet at a first end of the housing and an outlet at a second opposite end of the housing;
- and
- a channel arranged within the annular passageway of the housing along a spiral path to transport the first liquid and to define a spiral flow passageway between the inlet and the outlet for the second liquid, wherein the first liquid does not contact the second liquid and heat is to be transferred between the first and second liquids as the second liquid flows in the spiral passageway.
A downhole tool comprising:
- a hydraulically-activated downhole tool module;
- and
- a hydraulic module comprising:
- an outer cylindrical housing having a first diameter;
- and
- an inner cylindrical housing positioned within the outer cylindrical housing, the inner cylindrical housing having a second diameter smaller than the first diameter, a region between the inner and outer cylindrical housings defining a cylindrical annular region having an inlet at a first end and an outlet at a second end;
- coiled tubing arranged between the first and second ends within the cylindrical annular region to define a spiral flow passageway between the inlet and the outlet for a drilling fluid, and to return the hydraulic fluid from the hydraulically-activated downhole tool module to the inner cylindrical housing;
- a pump positioned in the inner cylindrical housing to pump the hydraulic fluid to the hydraulically-activated downhole tool module;
- and
- a motor positioned in the inner cylindrical housing to operate the pump, wherein the hydraulic fluid is to transfer heat from the motor to the drilling fluid via the tubing and the spiral flow passageway.
Dependencies are inferred from the claim text.