Preventing buckling in drill string

Details Preventing buckling in drill string Preventing buckling in drill string

1981-08-11

1983-05-24

Birmiel, Howard A.

Measuring and testing

Borehole or drilling

Downhole test

175 45, 364422, 33303, E21B 47024

Patent

active

043844839

ABSTRACT:
In the drilling of a well, buckling of a drill string is prevented by determining the buoyed weight, sliding friction, and external forces applied to the segments of a drill string and comparing the resultant axial force on each segment with a buckling threshold to indicate when the resultant axial force exceeds the threshold. The azimuth and inclination of segments of the drill string are measured. The forces on the drill string are resolved into the axial and normal components applied to the next shallower segment. From these, the forces applied to each segment are determined.

REFERENCES:
patent: 3622971 (1971-11-01), Arps
patent: 3759489 (1973-09-01), Jones
patent: 3968473 (1976-07-01), Patton
patent: 4021774 (1977-05-01), Asmundsson
patent: 4231252 (1980-11-01), Cherkson
patent: 4303994 (1981-12-01), Tanguy
Lubinski, Arthur, and Woods, H. B., "Factors Affecting the Angle of Inclination and Dog--Legging in Rotary Bore Holes".
Woods, H. B., and Lubinski, Arthur, "Practical Charts for Solving Problems on Hole Deviation," API Drilling and Production Practice, 1954, pp. 56-71.

Affiliated with

Also associated with

Rating

Preventing buckling in 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 Preventing buckling in drill string, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Preventing buckling in drill string will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2141139