Patent · US Active

Downhole operational modal analysis

US10364663B2 · kind B2 · utility

3Cited by

14References

14Claims

0Family size

Assignee

Baker Hughes, a GE company, LLC · US

Inventors

Andreas Hohl · Hannover, DE
Mohamed Ichaoui · Braunschweig, DE
Hanno Reckmann · Wathlingen, DE

Key dates

Filing date	Apr 1, 2016
Grant date	Jul 30, 2019
Priority date	—
Expiry date	Mar 8, 2037

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B47/00
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A method for selecting drilling parameters for drilling a borehole penetrating the earth with a drill string. The method includes: measuring vibration-related amplitudes of the drill string during operation using one or more vibrations sensor to provide amplitude measurements; determining with a downhole processor one or more modal properties comprising one or more eigenfrequencies of the drill string using the amplitude measurements, the determination being made by including any excitation force in a white noise term of a model of the drillstring; and selecting drilling parameters that apply an excitation force at a frequency that avoids a selected range of frequencies that bound the one or more eigenfrequencies using the processor.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.