The LWD equipment is battery powered and uses nonvolatile memory chips to store logging data until they are downloaded. The LWD tools took measurements at evenly spaced time intervals and were synchronized with a system on the drilling rig that monitors time and drilling depth. After drilling, the LWD tools were retrieved and the data were downloaded from each tool using a DB-25 485 cable serial link to a processing computer in the DHML. Synchronization of the uphole and downhole clocks allows merging of the time-depth data (from the surface system) and the downhole time-measurement data (from the tools) into depth-measurement data files. The resulting depth-measurement data were transferred to the processing systems in the DHML for reduction and interpretation.
Emex 3 Serial 11
2ff7e9595c
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