weight control on drilling bit

Most conventional anti-deviation devices have inherent limitations, and their anti-deviation effects are greatly affected by drilling parameters such as bit weight and rotary speed.

FG型防斜工具的显著特点是其防斜效果受钻压、转速等钻井参数影响较小,钻头侧向力大小基本不随钻压改变,在旋转过程中钻头侧向力方向可以不断变化。

Numerous investigations have been conducted aiming at the problems of the low penetration rate and easy deviation during drilling in deep and complicated formations, the high bit pressure during drilling large-diameter holes or horizontal wells, and the high drilling costs, etc.

针对目前深部、复杂地层钻速低和易产生井斜、大直径井眼和水平井施加钻压困难、钻井成本高等问题进行了大量的调研。

PERTURBATION STOCHASTIC FEM ANALYSIS FOR WEIGHT ON BIT ( WOB ) FLUCTUATION OF DRILL STRING;

钻压波动对轨迹影响的摄动随机有限元分析

The recursion formula for calculating WOB are established by means of the mechanical analysis.

通过力学分析，推导出计算钻压的迭代公式，即建立了计算井底钻压的力学模型。

The results show that longitudinal vibration of drill string is relative to rotary speed and weight on bit(WOB).

实验结果表明,钻柱的纵向振动主要与转速和钻压有关。

According to the parameter selection problems of diamond drilling in hard rocks analysis is made from weight on bit, rotation speed and pumping quantity.

针对坚硬地层金刚石钻进参数的选择问题 ,从钻压、转速与泵量三方面作了分析 ,提出了合理选择钻进参数的方法 ,以保证正常生产施工的需要 ,提高钻探进尺效

On the basis of the features of borehole deviation in Well Gong-30,the paper analyses the influence of BHA ,weight on bit,stratum and bit on borehole deviation in drilling,and propose some important technical measures to use PDC bit and Barus bit in drilling in centre Sichuan area.

针对川中地区公30井井斜特点,分析评价了钻具组合、钻压、地层和钻头应用等因素对井斜产生的影响,并就川中地区使用PDC和巴拉斯钻头钻井,提出了多项重要技术措施。