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Downhole Fluidic Sensor

IP.com Disclosure Number: IPCOM000226514D
Publication Date: 2013-Apr-11
Document File: 3 page(s) / 26K

Publishing Venue

The IP.com Prior Art Database

Abstract

A sensor is a converter that measures a physical quantity and converts it into a signal which can be read by an observer or by an electronic instrument. Though electronic sensors are almost fully developed, they still have reliability issues especially when working at extreme environmental conditions. The reliability issues of electronic sensors include reduced accuracy, decreased robustness, and limited life. Electronic sensors also need a power system. The downhole power options, especially downhole batteries, have substantial performance limitations and have extreme difficulty achieving a long life in extreme environmental conditions. The oil industry routinely encounters extreme environmental conditions such as high temperature and high pressure. Reliable alternatives to downhole electronic sensor are desired.

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Down hole fluidic sensor system

Liang Zhao, Michael Fripp, Jean Marc Lopez, and Luke Holderman

A sensor is a converter that measures a physical quantity and converts it into a signal which can be read by an observer or by an electronic instrument.  Though electronic sensors are almost fully developed, they still have reliability issues especially when working at extreme environmental conditions. The reliability issues of electronic sensors include reduced accuracy, decreased robustness, and limited life. Electronic sensors also need a power system. The downhole power options, especially downhole batteries, have substantial performance limitations and have extreme difficulty achieving a long life in extreme environmental conditions. The oil industry routinely encounters extreme environmental conditions such as high temperature and high pressure. Reliable alternatives to downhole electronic sensor are desired.

A downhole sensor system must have two key components: 1) a measurement of a downhole variable, and 2) a method to communicate that variable to the surface. In an electronic sensor, the sensor converts a downhole variable into an electrical voltage or electrical current and then that signal is transmitted to the surface either wirelessly or over an electrical cable.

A downhole fluidic sensor is a new method for sensing downhole variables and for wirelessly transmitting the measurement to the surface. A fluidic sensor creates changes in the fluid flow rate or the fluid pressure. These changes in the fluid flow are communicated to the surface via the tubing that exists in the wellbore.

A downhole fluidic sensor creates variations in the flow by adjusting the flowpath of the fluids. The variations in the flow path can be designed to be sen...