钻头尺寸

提出了一种可下入8层的非常规套管尺寸系列和相应的钻头尺寸系列，还对扩眼钻具、尾管和尾管回接进行了设计。

A unconventional serial of casing size running through 8 layers is proposed and corresponding bit size series is given .

从而对钻PCB的钻头尺寸与质量的要求也越来越高。

Thus the size and quality of PCB drill is demanding increasingly .

随着钻探新技术的发展，开发深井和超深井技术要求钻头尺寸小型化，由于单牙轮钻头具有三牙轮钻头和PDC钻头的优点，同时又弥补了二者的不足。

With the development of the new technology of drilling , the exploitation of deep well and over-deep well needs small size bit .

介绍了利用AutoCAD反求群钻钻头头部尺寸的方法。

The method to measure the drilling tool dimension by AutoCAD was introduced .

PDC钻头的尺寸还原与数控加工仿真

Size Reduction and NC Simulation of PDC Bit

通过喷嘴喷射试验，研究了煤田PDC钻头喷嘴尺寸和喷射距离与射流动压力的关系，得出了优化喷射结构参数。

Hased on the jet test of jet nozzle , the relationships between the dimension of jet nozzle of drilling bit and jet distance and the dynamic pressure of jet flow are studied , the optimal jet texture parameters are obtained .

钻头牙轮形状尺寸自动化测量系统

The automatic measuring system of shape and size of bit cone

微型钻头钻芯尺寸测量的研究

The Research on Measurement of Micro-drill Core Dimensions

入井前，带班队长或司钻要用合适的测量规核实扶正器、扩眼器、钻头，确保尺寸合适。

The Toolpusher or Senior Driller shall verify all stabilisers , reamers and bits will be gauged with appropriate ring gauge to ensure proper size before running in the hole .

例如钻头的几何形状及尺寸精度是以精密投影机检验。

A projector is applied to inspect the drill geometry and dimensional accuracy .

钻头弯矩与交错层的可钻性、下部钻具的结构和钻头的几何尺寸有关，并且与所加的钻压成正比。

The bending moment can be related to the formation drillability , BHA configuration and drill bit size , and is proportional to the applied WOB .