MCG

Definition: 
Compact Comms Gamma (see comment!)
Subject Area 1: 
A tool
Remarks: 
Weatherford Tool The Compact Comms Gamma tool (MCG) combines Gamma Ray, Temperature and CCL logs with power conversion and surface communications for all other measurements in a Compact tool string. It is always the top tool the string. The Auxiliary Gamma Sub (MGS) is shorter and can be placed anywhere in the string, allowing Gamma Ray and Temperature to be recorded close to the bottom of the well. Gamma Ray quality matches or exceeds that from our conventionally-sized tools with more counts per API unit and excellent repeatability. A wrap-around calibrator simulates downhole fluxes for optimum calibration accuracy. An integral power conditioner in the MCG automatically converts a wide range of cable head voltages to a standard value for all tools in the Compact string. This adds to system flexibility and reliability by eliminating the need to match surface power to particular logging cables. It also reduces rig up time when using third party wirelines, for example during coiled tubing operations. The MCG also processes data from the following auxiliary measurements: SP originating from Induction (MAI) and Laterolog (MLS) tools, Tension from the Compact Tension Cable Head (MCB), Tension and Compression from Tension Compression Sub (TCS), Temperature and CCL. Applications and advantages: • Lithology analysis • Correlation • Temperature profile • Cable matching (MCG only). Power converter • provides automatic matching to most logging cables • (MCG is mandatory in all Compact tool strings) • Gamma Ray, CCL (MCG only) & Borehole Temperature