drill log

drill log

[′dril ‚läg]
(engineering)
A record of the events and features of the formations penetrated during boring. Also known as boring log.
A record of all occurrences during drilling that might help in a complete logging of the hole or in determining the cost of the drilling.
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But those two in particular were definitely the most defining moments in terms of what we did as a country, on a state level and on the local level--whether it was throwing more money into school safety, investing in various types of products, or coming up with compliance regulations around safety plans and drill log requirements.
The drill log should document any and all conditions concerning the rock being drilled.
As part of the agreement, the company has acquired numerous maps, old drill log results and other data from a mining data base containing information produced by past Graysill area claim owners, in exchange for 100,000 shares of its common stock.
Lithogeochemistry should be considered as part of a loop which starts with sound lithological, mineralogical, and structural observations, followed by petrography and geochemistry to provide a quantitative link to the field observations, with results that can be plotted on a map or drill log.
There are numerous references in the drill log to hydrothermal injections of the contained semi-massive to massive textured sulphides in this zone and a mineralized fault zone containing sulphides, gold and silver is noted at 52.
The key to this study was taking advantage of the wealth of recently available geologic data from the interpretation of thousands of new drill logs from coalbed methane development in the PRB.
Table 1 below shows the seam depth and thickness correlated from drill logs and geophysical logging for all of Phase 4 drilling (TCM055 - TCM063).