hook load

The writer verifies that the designed safety coefficient of wire line should be bigger than 3 while the hook has the speed of 0.4-0.55 m/ sec at hook load rating, corresponding to the drawworks operation at the third speed and air clutch operation at rated torque;

证实额定大钩钩载时，大钩速度为0.4～0.55米/秒，相当于绞车在Ⅲ档工作，气胎离合器在额定扭矩工作，此时钢丝绳设计安全系数大于3。

When the hook height and hook load reach the set values, the system can carry out alerting signal and braking action.

当大钩高程和载荷达到设定限位时，可实施声光预警／报警和制动。

The rule of hook load and friction coefficient is applied to enhance predictive accuracy of frictional drag in new area or different BHAs and heighten utilization ratio of frictional drag. Drag theory can be combined with practice, and drill string mechanics analysis system is supplemented.

利用钩载和摩阻系数的规律性，能够提高新区块或者不同钻具组合摩阻预测的准确性，增强现场施工摩阻的利用率，达到理论结合实际，丰富完善钻柱力学分析体系的目的。

Calculation method of rig hook load on deepwater drilling platform

深水钻井平台钻机大钩载荷计算方法