. Deep borehole surveys and problems. Boring. FiGS. 38 and 39.—Lapp's core Fig. 40.—Koerner's core orientating apparatus. tion by dropping in a weight and releasing a fixing device which forces pointers into a cork disc. Like his deviation device, it shows the dip in amount better than direction, the latter being obtained by computation. The pipe drill and core barrel are orientated out of the well by measuring each stand. Figure 40 shows the apparatus for aligning. Please note that these images are extracted from scanned page images that may have been digitally enhanced for reada
. Deep borehole surveys and problems. Boring. FiGS. 38 and 39.—Lapp's core Fig. 40.—Koerner's core orientating apparatus. tion by dropping in a weight and releasing a fixing device which forces pointers into a cork disc. Like his deviation device, it shows the dip in amount better than direction, the latter being obtained by computation. The pipe drill and core barrel are orientated out of the well by measuring each stand. Figure 40 shows the apparatus for aligning. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Haddock, M. H. (Marshall Henry). New York, McGraw-Hill
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