Downhole monitoring using magnetostrictive probe

摘要

A system, method and apparatus for controlling a downhole operation is disclosed. A tool is operated to perform the downhole operation at a selected downhole location using a first value of an operation parameter of the tool. A magnetostrictive probe is used to determine a temperature profile along a section of a wellbore related to the operation being performed using the first value of the operation parameter. At least one temperature of the temperature profile is compared to a selected threshold. The operation parameter is altered to a second value based on the comparison of the temperature profile to the selected threshold.

主权项

1. A method of controlling a downhole operation, comprising:
controlling a tool to perform the downhole operation at a selected downhole location using a first value of an operation parameter of the tool, wherein a magnetostrictive probe extends along a section of the tool for determining a temperature profile along the section of the tool related to the operation being performed using the first value of the operation parameter; and using a processor to:
activate a transducer at a first location of the magnetostrictive probe to generate an ultrasonic pulse at the first location,receive a signal from the transducer related to a reflection of the generated ultrasonic pulse from a first notch at a second location of the magnetostrictive probe,determine a travel time of the ultrasonic pulse between the first location and the second location,determine a temperature at the second location from the determined travel time and a reference travel time for an ultrasonic pulse between the first location and the second location at a known reference temperature,determine, from the temperature at the second location, a temperature profile along the section of the tool;compare the temperature profile to a selected threshold, andalter the operation parameter to a second value based on the comparison of the temperature profile to the selected threshold.