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Suction Circulation System

IP.com Disclosure Number: IPCOM000237679D
Publication Date: 2014-Jul-02
Document File: 3 page(s) / 3M

Publishing Venue

The IP.com Prior Art Database

Abstract

This invention is for a simple motor cooling enhancement for downhole motors. This invention could be particularly useful with high volume pumps, located below fluid entry, as could be found in canned ESP systems, or pumps is a cavern or sump situation. Any large casing, high flow, and high fluid level applications. Water systems would be most appropriate. When ESP motors are employed, motor cooling is a great concern. Usually a portion of production fluid is required to flow past the motor in order to conduct heat away and cool the motor. This invention is for motor cooling system in which flow is caused due to suction pressure at the pump intake. It works on pump suction. Hydrostatic pressure near the pump intake is lower than some distance away. By attaching a circulation conduit to the pump intake (low pressure area), and extending the conduit below the motor, will cause circulation from below the motor and into the pump intake. This fluid would add cooling capacity for the motor. Using a filter screen at the pump intake would allow greater suction allowing for more flow rate through the circulation conduit. This invention is similar to Centrilift’s Recirculation System, except this invention operates in an opposite manner and does not require a special pump. The filter-version system can be added to an existing pump. See the attached sketches for details.

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Suction Circulation System

This invention is for a simple motor cooling enhancement for downhole motors. This invention could be particularly useful with high volume pumps, located below fluid entry, as could be found in canned ESP systems, or pumps is a cavern or sump situation. Any large casing, high flow, and high fluid level applications. Water systems would be most appropriate. When ESP motors are employed, motor cooling is a great concern. Usually a portion of production fluid is required to flow past the motor in order to conduct heat away and cool the motor. This invention is for motor cooling system in which flow is caused due to suction pressure at the pump intake. It works on pump suction. Hydrostatic pressure near the pump intake is lower than some distance away. By attaching a circulation conduit to the pump intake (low pressure area), and extending the conduit below the motor, will cause circulation from below the motor and into the pump intake. This fluid would add cooling capacity for the motor. Using a filter screen at the pump intake would allow greater suction allowing for more flow rate through the circulation conduit. This invention is similar to Centrilift’s Recirculation System, except this invention operates in an opposite manner and does not require a special pump. The filter-version system can be added to an existing pump. See the attached sketches for details.