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Downhole Chemical Injection Fiber Optic Flow Meter with Temperature Measurement

IP.com Disclosure Number: IPCOM000247125D
Publication Date: 2016-Aug-08
Document File: 1 page(s) / 14K

Publishing Venue

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Abstract

The invention proposed is a downhole chemical injection mandrel with an integrated measurement device capable of obtaining temperature and flow measurements. Two types of downhole fiber optic sensors are used- one fiber optic cable to measure fluid temperature, and another fiber optic cable to measure strain or acoustic energy proportional to flow rate. The fiber optic cables can be run in the same protective sheath to make measurements at the same physical location downhole. Remote measurement of flow rate, as well as temperature, enables informed decisions on chemical composition and greater control of flow rate at the surface. Additionally, multiple instances of the device could be used in a wellbore for injection of chemicals. Primary Method: Flow rate and temperature measurements with a flow across a fiber optic The primary implementation of the invention is the integration of the fiber optic measurement device(s) connected to the flow path in the chemical injection mandrel, with the flow running across the fiber. This allows for determination of the fluid temperature. Furthermore, prior calibration of the fiber optic serving as a strain/ acoustic energy measurement allows for determination of flow rate. Implementation of this into a chemical injection mandrel requires the following components: 1) Chemical injection mandrel 2) Chemical injection valve 3) Fluid flow path with intersecting path for fiber optic sensors 4) Access ports allowing the fiber optic measurement devices to run across the fluid flow path 5) Protective housing with fiber optic cables running to surface 6) Surface interrogation unit (including laser light source, light detector, processing module)

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Downhole Chemical Injection Fiber Optic Flow Meter with Temperature Measurement

The invention proposed is a downhole chemical injection mandrel with an integrated measurement device capable of obtaining temperature

and flow measurements. Two types of downhole fiber optic sensors are used- one fiber optic cable to measure fluid temperature, and

another fiber optic cable to measure strain or acoustic energy proportional to flow rate. The fiber optic cables can be run in the same

protective sheath to make measurements at the same physical location downhole. Remote measurement of flow rate, as well as

temperature, enables informed decisions on chemical composition and greater control of flow rate at the surface. Additionally, multiple

instances of the device could be used in a wellbore for injection of chemicals.

Primary Method: Flow rate and temperature measurements with a flow across a fiber optic The primary implementation of the invention is

the integration of the fiber optic measurement device(s) connected to the flow path in the chemical injection mandrel, with the flow running

across the fiber. This allows for determination of the fluid temperature. Furthermore, prior calibration of the fiber optic serving as a strain/

acoustic energy measurement allows for determination of flow rate. Implementation of this into a chemical injection mandrel requires the

following components: 1) Chemical injection mandrel 2) Chemical injection valve 3) Fluid flow path with intersecting pat...