Standard data chain and CRC-16 check mode are used in inquiry control by the central station at the drilling company.
数据网由中心站（钻井公司）采用轮询方式控制，使用标准的数据链路控制规程，和CRC-16校验方式。
From a spare part to a comprehensive drilling system and from a generic valve to a fully integrated supply chain process, National Oilwell Varco delivers unlimited customer solutions.
从一个备件到一套完整钻井系统，从一个普通的阀门到一套集成的供应链程序，国民油井华高提供各种无限制的用户解决方案。
The result of calculation shows that qualified roller chains for drilling rigs are competent for the job on chain-drive pumping units.
计算结果表明，质量合格的石油钻机传动滚子链能胜任链条抽油机的传动。
And also the author introduces the characteristics and application benefits of the new chain-type percussion drilling, and analyzes the popularization and application prospect of the drill.
并介绍了新型链式冲击钻的特点及应用效益，进一步分析其推广应用的前景。
The abrasive wear, fatigue wear and adhesive wear are the main factors causing the excess wear and breaking of the driving chain on drilling RIGS.
磨料磨损、疲劳磨损和胶合等是引起石油钻机传动链条磨损超限，承载；能力降低，最后导致链条断裂破坏的主要原因。
The abrasive wear, fatigue wear and adhesive wear are the main factors causing the excess wear and breaking of the driving chain on drilling RIGS.
磨料磨损、疲劳磨损和胶合等是引起石油钻机传动链条磨损超限，承载；能力降低，最后导致链条断裂破坏的主要原因。
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