| http://www.w3.org/ns/prov#value | - It is typically placed in the drill string immediately in advance of drilling through a stratum where data will be required more or less on a real time basis, that is, wherein it is important to have data as to the orientation of the drill bit, downhole pressure, downhole temperature, or other information as to the borehole such as the formation composition which can be indicated by gamma ray inst
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