A precision-engineered pin that securely connects the Kelly bar to the drill string in rotary drilling rigs, transmitting torque and axial loads.
The Lower Connection (Pin) is a critical mechanical component in Kelly bar systems used in foundation drilling and geotechnical applications. This hardened steel pin features precision threads and mating surfaces designed to create a rigid, torque-transmitting connection between the Kelly bar's lower end and the drill string or drilling tool. It must withstand extreme torsional forces during drilling operations while maintaining alignment and preventing disconnection under dynamic loads. The component typically includes standardized thread profiles (like API or proprietary designs), wrench flats for installation, and may incorporate sealing surfaces for pressure containment in deep drilling applications.
诱因 → 失效模式 → 工程缓解
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The pin securely connects the Kelly bar to the drill string, transmitting rotational torque for drilling while maintaining alignment and withstanding axial loads during penetration.
Visual inspection before each use, dimensional checks every 200 drilling hours, and magnetic particle inspection every 1,000 hours or after any impact event.
Only when pins meet identical thread specifications and dimensional standards; most systems require brand-matched components due to proprietary designs.
CNFX 是开放目录，不是交易平台或采购代理。工厂资料和表单用于帮助你准备直接沟通。
CNFX 制造商资料、技术分类、公开产品信息和持续合理性检查。
说明目标数量、应用场景、交期和关键技术要求，用于准备 RFQ 或供应商评估。