Patent · US Active

Normalized status variables for vibration management of drill strings

US10822939B2 · kind B2 · utility

2Cited by

6References

19Claims

0Family size

Assignee

Baker Hughes, a GE company, LLC · US

Inventors

Andreas Hohl · Hannover, DE
Christian Herbig · Sulingen, DE
Hatem Oueslati · Lattes, FR
Hanno Reckmann · Wathlingen, DE
Michael Neubert · Lakeville, US

Key dates

Filing date	Jun 23, 2017
Grant date	Nov 3, 2020
Priority date	—
Expiry date	Dec 25, 2038

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B47/12
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

Unwanted oscillations of a drill string while a borehole is being drilled are limited by adjusting a drilling parameter. Measurements related to oscillations of the drill string can be extrapolated by calculation to a position of interest along the drill string using a mode identified from one or more determined modes and a stability criterion that models the drill string. The stability criterion includes a specific modal damping for each of the one or more determined modes. The position of interest may correspond to a location of a tool or component that may be damaged by the unwanted oscillations. If the tool or component can be damaged by the oscillations as calculated, then the drilling parameter is adjusted to limit those oscillations.

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