Method and apparatus for determining the shape of an earth boreh

Details Method and apparatus for determining the shape of an earth boreh Method and apparatus for determining the shape of an earth boreh

1998-09-25

2000-05-23

Fulton, Christopher W.

Geometrical instruments

Gauge

Internal

33302, 33304, G01B 2120, G01B 1504, E21B 4700, E21B 47022

Patent

active

060652195

ABSTRACT:
A method and apparatus are provided for estimating the cross-sectional shape and orientation of an earth borehole and the motion of a tool therein. The method and apparatus involve measuring the distance from the tool to the borehole wall at a plurality of locations around the periphery of the tool and fitting those measured distances to a predetermined shape function using a nonlinear parameter estimation technique to minimize the error between the estimated shape of the borehole and the measured distances. The method and apparatus may be used to estimate elliptical and higher order borehole shapes. Additionally, the method and apparatus may be used while drilling the borehole.

REFERENCES:
patent: 2596023 (1952-05-01), Goble et al.
patent: 4611405 (1986-09-01), Van Steenwyk
patent: 4958125 (1990-09-01), Jardine et al.
patent: 5128867 (1992-07-01), Helm
patent: 5469736 (1995-11-01), Moake
patent: 5565624 (1996-10-01), Deboaisne et al.
patent: 5638337 (1997-06-01), Priest
patent: 5737277 (1998-04-01), Priest
Priest, Computing Borehole Geometry and Related Parameters from Acoustic Caliper Data, SPWLA 38.sup.th Annual Logging Symposium, Houston, TX, Jun. 15-18, 1997, pp. 1-13.
Moake, et al., Standoff and Caliper Measurements While Drilling Using a New Formation-Evaluation Tool with Three Ultrasonic Transducers, SPE Drilling & Completion, Jun. 1995, pp. 104-111.
Birchak, et al., Standoff and Caliper Measurements While Drilling Using a New Formation-Evaluation Tool with Three Ultrasonic Transducers, SPE Paper No. 26494, 68.sup.th Annual Technical Conference and Ehibition, Houston, TX, Oct. 3-6, 1993, pp. 104-111.

Affiliated with

Also associated with

Rating

Method and apparatus for determining the shape of an earth boreh 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 the shape of an earth boreh, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for determining the shape of an earth boreh will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1828137