Drill module for borehole stress measuring instrument

Details Drill module for borehole stress measuring instrument Drill module for borehole stress measuring instrument

1975-06-09

1976-07-20

Myracle, Jerry W.

Measuring and testing

Ductility or brittleness

73151, E21B 4900

Patent

active

039699293

ABSTRACT:
A drill module for use in a holographic borehole instrument which is operable to determine the stress in the wall of a borehole by recording successively on the same holographic recording medium two holograms of a selected surface region of the wall and, in the interval between the two recordings, drilling a stress relief hole in the wall in stress relieving relation to the selected surface region to produce on the recording medium a double exposure hologram containing holographic information representing the stress. The drill module embodies a drill which is normally retracted from the field of view of the holographic system to permit unobstructed holographic recording of the selected wall surface region and which is extended into the field to drill the stress relief hole in the interval between the two holographic recordings.

REFERENCES:
patent: 3002404 (1961-10-01), Estabrook
patent: 3557886 (1971-01-01), Cobbs
patent: 3563652 (1971-02-01), Powell et al.

Affiliated with

Also associated with

Rating

Drill module for borehole stress measuring instrument does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Drill module for borehole stress measuring instrument, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drill module for borehole stress measuring instrument will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-549778