Abstract
Abstract The exploration of deep shale gas in southern Sichuan faces a challenging operational environment characterized by elevated temperatures, high pressures, and intense vibrations. These conditions cause the heightened failure rate among steerable instruments and low drilling efficiency. In response to these challenges, this study introduces an advanced high-temperature near-bit geosteering drilling system, which can withstand temperature 175°C and pressure 140MPa while adapting to diverse drilling fluid environments. Field tests have been successfully carried out in south Sichuan, effectively improving drilling efficiency. Furthermore, this research identifies deficiencies observed during the Beijing Petroleum Machinery near-drill bit field test and presents multiple optimization strategies aimed at mitigating instrument failures resulting from downhole vibrations. These efforts are directed towards reducing instrument failure rates while offering crucial technical support for the efficient development of deep shale gas resources.
Published Version
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