G - Physics – 01 – V
Patent
G - Physics
01
V
G01V 3/38 (2006.01) E21B 44/00 (2006.01) E21B 47/00 (2006.01) G01V 1/22 (2006.01) G01V 1/48 (2006.01) G01V 3/18 (2006.01) G01V 3/36 (2006.01) G01V 11/00 (2006.01)
Patent
CA 2053117
- 35 - ABSTRACT OF THE DISCLOSURE Improved techniques are provided for correcting signals from a downhole sensor on a drill collar eccentrically rotating within a borehole. The corrected sensor signal may be used to generate a well log which more accurately represents the conditions which the sensor would have generated had the tool been rotating such that the spacing between the sensor and the borehole well remained constant. The sensor signals are generated at time intervals of less than half the period of rotation of the drill collar. The frequency components of the time- varying sensor signals are plotted, and the frequency component attributable to the eccentric rotation between the drill collar and the borehole may be determined. The magnitude of this frequency component may be used to generate a correcting sensor signal, which then modifies the average sensor signal so that a more accurate well log may be obtained. The techniques of the present invention may be used to determine actual rotational speed of the drill collar and the spacing between the sensor and the wall, and are particularly well suited to determining a whirling condition in real time and alter drilling parameters in response thereto.
Baroid Technology Inc.
Kirby Eades Gale Baker
Twist James R.
LandOfFree
Technique for reducing whirling of a drill string does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Technique for reducing whirling of a drill string, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Technique for reducing whirling of a drill string will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1464759