Measuring and testing – Borehole or drilling – Downhole test
Patent
1984-03-30
1986-01-28
Birmiel, Howard A.
Measuring and testing
Borehole or drilling
Downhole test
731515, 175 48, E21B 4500
Patent
active
045663181
ABSTRACT:
The present invention is directed to a method for optimizing the tripping velocity of a drill string. The method of the present invention comprises determining the hydraulic fluid pressure in the borehole in a plurality of intervals as the drill string is pulled out of or run into the borehole. These actual pressures are compared against a predetermined acceptable pressure range for each interval. The limits for this acceptable pressure range are set by the maximum acceptable surge pressures and the minimum acceptable swab pressures established for the interval. The velocity of the drill string in each such interval is then adjusted in order to maximize the tripping velocity while maintaining the hydraulic fluid pressure within the acceptable range for each interval. In fact, the velocity is preferably adjusted to maintain the fluid pressure near the maximum acceptable surge pressure while the drill string is being run into the borehole and to maintain the fluid pressure near the minimum acceptable swab pressure while the drill string is being pulled out of the borehole.
REFERENCES:
patent: 3910110 (1975-10-01), Jeffries et al.
patent: 4510797 (1985-04-01), Guidry et al.
Fontenot, Jr. John E.
Rao M. Vikram
Birmiel Howard A.
NL Industries Inc.
LandOfFree
Method for optimizing the tripping velocity 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 Method for optimizing the tripping velocity of a drill string, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for optimizing the tripping velocity of a drill string will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1300006