Geometrical instruments – Indicator of direction of force traversing natural media – Borehole direction or inclination
Reexamination Certificate
2006-07-25
2006-07-25
Bennett, G. Bradley (Department: 2859)
Geometrical instruments
Indicator of direction of force traversing natural media
Borehole direction or inclination
C033S302000
Reexamination Certificate
active
07080460
ABSTRACT:
A method for surveying a subterranean borehole is provided. The method includes determining tool face angles at first and second longitudinal positions in the borehole. The method further includes processing the tool face angles to determine a change in borehole azimuth between the first and second positions. Exemplary embodiments of this invention provide a direct mathematical solution for the change in azimuth and therefore provide for improved accuracy and reliability of azimuth determination (as compared to the prior art) over nearly the entire range of possible borehole inclination, azimuth, tool face, and dogleg values.
REFERENCES:
patent: 3725777 (1973-04-01), Robinson et al.
patent: 5128867 (1992-07-01), Helm
patent: 5512830 (1996-04-01), Kuckes
patent: 5657826 (1997-08-01), Kuckes
patent: 5675488 (1997-10-01), McElhinney
patent: 5787997 (1998-08-01), Hartmann
patent: 6321456 (2001-11-01), McElhinnney
patent: 6480119 (2002-11-01), McElhinney
patent: 6631563 (2003-10-01), Brosnahan et al.
patent: 2001/0041963 (2001-11-01), Estes et al.
patent: 2002/0144417 (2002-10-01), Russell et al.
patent: 2003/0070844 (2003-04-01), Radzinski et al.
patent: 2003/0209365 (2003-11-01), Downton
patent: 2004/0073369 (2004-04-01), McElhinney
patent: 2004/0238222 (2004-12-01), Harrison
patent: 2004/0249573 (2004-12-01), McElhinney
patent: 1585479 (1981-03-01), None
patent: 2086055 (1982-05-01), None
patent: 2321970 (1998-08-01), None
patent: 2331811 (1999-06-01), None
patent: 2370645 (2002-07-01), None
patent: 2394779 (2004-05-01), None
patent: 2398638 (2004-08-01), None
patent: 2398879 (2004-09-01), None
patent: 2402746 (2004-12-01), None
patent: 2405927 (2005-03-01), None
F.J. Schuh, Trajectory Equations for Constant Tool Face Angle Deflections, IADC/SPE 23853, p. 111-123, (1992).
G. McElhinney, R. Sognnes, B. Smith, Case Histories Demonstrate a New Method for Well Avoidance and Relief Well Drilling, SPE/IADC 37667 (1997).
P.E. Berger, R. Sele, Improving Wellbore Position Accuracy of Horizontal Wells by Using a Continuous Inclination Measurement from a Near Bit Inclination MWD Sensor, SPE 50378 (1998).
G.A. McElhinney, A Margeirsson, K. Hamlin, and I. Blok, Gravity MWD: A New Technique to Determine Your Well Path, IADC/SPE 59200 (2000).
S.J. Sawaryn, J.L. Thorogood, A Compendium of Directional Calculations Based on the Minimum Curvature Method, SPE 84246 (2003).
E. Matheson, G McElhinney, and R. Lee, The First Use of Gravity MWD in Offshore Drilling Delivers Reliable Azimuth, SPE 87166 (2004).
McElhinney, G.A., Margeirsson, A., Hamlin, K., and Blok, I., “Gravity MWD: A New Technique To Determine Your Well Path,” 2000 IADC/SPE Drilling Conference, New Orleans, Louisiana, Feb. 23-25, 2000, IADC/SPE Paper No. 59200.
Marketing material MagTraC Jun. 2003 by Scientific Drilling available for download at http://www.scientificdrilling.com/pdf/magtrac%20overview.pdf.
Bennett G. Bradley
PathFinder Energy Sevices, Inc.
LandOfFree
Determining a borehole azimuth from tool face measurements does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Determining a borehole azimuth from tool face measurements, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Determining a borehole azimuth from tool face measurements will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3590880