VIBRATION DETECTION IN A DRILL STRING BASED ON MULTI-POSITIONED SENSORS

摘要

In some example embodiments, a system includes a drill string having a drill bit. The drill string extends through at least part of a well bore. The system also includes a first vibrational sensor, positioned on the drill bit to measure, at a first location on the drill string, an amplitude of one or more of an axial vibration and a lateral vibration. The system also includes a second vibrational sensor, positioned above the drill bit and on the drill string. The second vibration sensor is to measure, at a second location on the drill string, one or more of an axial vibration and a lateral vibration. The system includes a processor unit to determine a type of vibration based on a comparison of the amplitude at the first location to the amplitude at the second location, wherein the type of vibration is at least one of bit whirl of the drill bit and a while of a bottom hole assembly that is part of the drill string.

主权项

1. A method comprising:
during a drilling operation, measuring a vibration of a drill string using at least one vibrational sensor positioned at the drill string; analyzing the measured vibration to determine at least one vibration frequency; and based on the at least one vibration frequency, determining whether the measured vibration is a bit whirl vibration, a Bottom Hole Assembly (BHA) vibration, or a lateral shock vibration.