US 12,571,296 B2 · Frequency analysis of time-series vibrational data

Abstract

Method and systems are described that obtain or collect time-series vibration data related to operation of a downhole drilling system and convert the time-series vibration data to frequency domain vibration data. The frequency domain vibration data can be evaluated to determine one or more vibrational resonance frequencies as well as corresponding non-aliased harmonic frequencies (if and when present) and aliased harmonic frequencies (if and when present) in the frequency domain vibration data. Change in the one or more vibrational resonance frequencies in the frequency domain vibration data over time can be monitored during the drilling operations to detect or predict the occurrence of a defect or failure or other unwanted conditions (e.g. HFTO) in the drilling system. A health alert can be generated in response to the detection or prediction of the occurrence of a defect or failure or other unwanted condition in the drilling system.

Claims18

Dependent claims

A method for assessing health of a downhole drilling system, comprising:

obtaining or collecting time-series vibration data related to drilling operations of the drilling system, wherein the time-series vibration data is derived from data sampling operations of a plurality of different signals at a plurality of distinct sampling frequencies, the plurality of distinct sampling frequencies including a first sampling frequency and a second sampling frequency;
converting the time-series vibration data to frequency domain vibration data;
and
evaluating the frequency domain vibration data over time to identify and track at least one fundamental frequency, corresponding non-aliased harmonic frequencies in the frequency domain vibration data that are less than a Nyquist frequency associated with the first sampling frequency, and corresponding aliased harmonic frequencies in the frequency domain vibration data that are greater than the Nyquist frequency associated with the first sampling frequency.

1 more element

One or more non-transitory computer-readable storage media including instructions that, when executed by one or more processors, cause the one or more processors to perform operations comprising:

obtaining or collecting time-series vibration data related to drilling operations of the drilling system, wherein the time-series vibration data is derived from data sampling operations of a plurality of different signals at a plurality of distinct sampling frequencies, the plurality of distinct sampling frequencies including a first sampling frequency and a second sampling frequency;
converting the time-series vibration data to frequency domain vibration data;
and
evaluating the frequency domain vibration data over time to identify and track at least one fundamental frequency, corresponding non-aliased harmonic frequencies in the frequency domain vibration data that are less than a Nyquist frequency associated with the first sampling frequency, and corresponding aliased harmonic frequencies in the frequency domain vibration data that are greater than the Nyquist frequency associated with the first sampling frequency.

1 more element

Dependencies are inferred from the claim text.

Frequency analysis of time-series vibrational data

Life of this patent

Frequency analysis of time-series vibrational data

Life of this patent

Abstract

Claims18