Method and apparatus for determining drill string movement mode

Details Method and apparatus for determining drill string movement mode Method and apparatus for determining drill string movement mode

2006-10-03

2006-10-03

Bates, Zakiya W. (Department: 3676)

Boring or penetrating the earth

With signaling, indicating, testing or measuring

C175S039000, C175S045000

Reexamination Certificate

active

07114578

ABSTRACT:
A method for determining movement mode in a drill string includes measuring lateral acceleration of the drill string, determining lateral position of the drill string from the acceleration measurements, and determining mode from the position with respect to time. Another method includes measuring drill string acceleration along at least one direction, spectrally analyzing the acceleration, and determining existence of a particular mode from the spectral analysis. A method for determining destructive torque on a BHA includes measuring angular acceleration at at least one location along the BHA, and comparing the acceleration to a selected threshold. The threshold relates to a moment of inertia of components of the BHA and a maximum torque applicable to threaded connections between BHA components. A warning is generated when acceleration exceeds the threshold.

REFERENCES:
patent: 4715451 (1987-12-01), Bseisu et al.
patent: 5245871 (1993-09-01), Henneuse et al.
patent: 5864058 (1999-01-01), Chen
patent: 6021377 (2000-02-01), Dubinsky et al.
patent: 6230822 (2001-05-01), Sullivan et al.
patent: 6237404 (2001-05-01), Crary et al.
patent: 6315062 (2001-11-01), Alft et al.
Search Report, European Patent Office, Application No. 03721525.8-2315 (corresponds to present US patent application) dated Nov. 17, 2005.

Affiliated with

Also associated with

Rating

Method and apparatus for determining drill string movement mode does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for determining drill string movement mode, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for determining drill string movement mode will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3635714