wob

The increased WOB is not good for deviation control .

当转速一定时，提高钻压不利于防斜打直。

The analysis of the connection between adjusting disc brake and WOB

盘式刹车调节与钻压关系的分析

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。

A new method of solving build-up hole angle problem on pendulum assembly while WOB is increasing

解决钟摆钻具在大钻压下增斜问题的新思路

The Wearing Law of One PDC Cutter under Fixed WOB and Fixed Rotary Speed

定钻压、定转速条件下PDC钻头单切削齿磨损规律研究

WOB : A Novel Approach to Checkpoint Active Files

WOB：一种新的文件检查点设置策略

The application of thin-film sputtering technology in downhole TOR & WOB measurement

溅射薄膜技术在井下扭矩/钻压测量中的应用

In drilling high angle deviated holes , friction is the main factor affecting the effective WOB .

在大斜度定向井钻井过程中，摩擦阻力是影响有效钻压的主要因素。

Application of servocontrol technique in simulation of WOB

伺服控制技术在钻压模拟中的应用

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

Drilling parameter model with the low rotation speed-high WOB of PDC bits and its application

PDC钻头的低转速&高钻压钻井参数模式及应用

Pressure balance is also applied in WOB calculation . Field test showed that both models are reliable and the calculated results are correct .

同时也用压力平衡法计算出钻压，现场试验表明，两模型可靠、计算结果正确。

Thereby the basic equations for analyzing the actual bottom hole WOB in curved holes are worked out .

在此基础上，建立了对弯曲井眼中的钻柱进行井底实际钻压分析的基本方程及相应的迭代求解格式。

Research on bottom WOB of hori-zontal well

水平井井底钻压的研究

Calculating Method and Effect on ROP of Ratio for WOB of RWD Tools toroidal coupled MWD

随钻扩眼工具钻压分配比的计算方法及对钻速的影响

These methods that then real-time diagnosis is carried out and optimizing model for WOB is built up by use of BP neural network were given .

给出了利用反向传播神经网络（BP网络）进行实时诊断和建立钻压优化模型的方法。

WOB with no more than drill pipe or casing to allow imposed WOB .

跟管钻压不超过钻具或套管允许施加的钻压。

When nominal WOB is certain , the average value of WOB has the tendency of reduction with the rotational speed increasing .

当对钻具施加的名义钻压一定时，随着转速的增加，平均钻压有减小的趋势。

Application of downhole hydrodynamic propulsors solves the problem of exerting WOB , and are helpful to enhancing penetration rate .

井下液力推进器的应用在一定程度上解决了钻压的施加问题，有利于提高钻进速度。

Design idea and development method of a microcomputer control system for optimization WOB ( weight on bit ) automation bit feed of oil rig disc brake is discussed .

阐述了盘式刹车钻压优化自动送钻微机控制系统的设计思想和研制方法，给出了系统的软硬件设计方法。

The capability in absorption of bit 's shock and vibration to provide a controlled constant WOB has made a wide application of hydraulic thruster in oil fields .

水力加压器由于能吸收钻头冲击振动，能提供一恒定的易于控制的钻压而在油田得到广泛应用。

When torque is not considered , the critical WOB for the hinged hinged model obtained here is the same as the previous results got from the energy method .

在不计扭矩情况下，用解析法求得的两端铰支模型钻柱的临界钻压与用能量法得到的结果相同。

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

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。

Moreover , regarding to reducing the longitudinal vibration of bottom string in straight hole , there is the problem of optimization grouping between WOB and rotary speed .

另外，在减小直井底部钻柱纵向振动的问题上存在钻压与转速的优化组合。

The factors , such as WOB , deviation angle , hole curvature and clearance between stabilizer and wellbore , effecting bit side force have been discussed .

在此基础上，通过算例分析，阐明了钻压、井斜角、井眼曲率及稳定器间隙对钻头侧向力的影响规律。

The combined experiments on granite and concrete blocks are carried out with horniness alloy cutting tools through changing the values of WOB ( Weight on Bit ) or impact energy .

通过改变静压、冲击能的大小，应用硬质合金刀具对花岗岩、砂浆块进行了静压-冲击组合破碎试验。

Correlation study on drilling weight on bit ( WOB ) fluctuation rules of pendulum assembly and unbalanced assembly was carried out by using simulation device for bottom hole assembly ( BHA ) .

利用底部钻柱动力学研究试验装置对钟摆钻具与偏轴钻具的钻压波动规律进行了对比研究。

Analysis on subsea wellhead stability of surface BOP drilling system in deepwater operations Application of downhole hydrodynamic propulsors solves the problem of exerting WOB , and are helpful to enhancing penetration rate .

深水水上防喷器钻井系统水下井口稳定性分析井下液力推进器的应用在一定程度上解决了钻压的施加问题，有利于提高钻进速度。

Tests of single-cutter abrasive speed under fixed WOB and fixed rotary speed show that the linear wearing speed model is correct , and it provides a new way to research the wearing law of PDC cutters .

定钻压、定转速条件下的单切削齿磨损速度试验结果表明，切削齿的线磨损模式是正确的。该方法是研究PDC钻头切削齿磨损规律的一个新途径。

Finally Ansys software is used to analyze mechanical force of bit mainly by changing the WOB and surface force of PDC to obtain the greatest stress and the stress of the bit and change of force on the thread .

运用Ansys软件对钻头进行了受力分析，主要通过改变钻压与PDC面力，来分析钻头所受最大应力与螺纹上的应力的改变情况。