TECHNOLOGY Logging while tripping cuts time to run gamma ray

A new logging tool, sent down the drillstring before a pipe trip out of the hole, logs the well as the pipe is pulled from the hole, cutting the total time required for open hole logging on some wells. This logging while tripping (LWT) technology allows an operator to run a gamma ray and neutron log more quickly than with standard wire line equipment. The drill pipe conveys the logging tools up the well as the pipe is tripped out, and the logging data are stored in the tool's memory. A "transparent" logging collar, which meets API 7 and RP7G requirements, holds the tools in the drillstring without interfering with the logging measurements. Tool designer LWT Instruments Inc. s...

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