pre-bending

The drilling techniques of anti-deviation and fast penetration with pre-bending dynamics can make the well hole vertical by using the whirl features of the BHA of anti-deviation and fast penetration with pre-bending dynamics to create an anti-deviation force that is much more than the pendulum dropping force.

预弯曲动力学防斜打快钻井技术主要利用预弯曲动力学防斜打快钻具组合在井眼中的涡动特征,在钻头上形成一个远大于钟摆降斜力的防斜力,从而使井眼保持垂直。

To crack Turpan-Hami oilfield shanle block formation complex structures,inclination,drillability poo and complex stratigraphic structure problems,it is the first time of the application of techniques of deviation control and fast penetration with pre-bending dynamics.

针对吐哈油田鄯善区块地层倾角大、可钻性差、易斜、复杂的地层结构难题,吐哈钻井公司首次在鄯5-142井应用预弯曲动力学防斜打快技术代替降钻压吊打防斜钻井技术。

Uses the CT Scanning and Establish Three-dimensional Model to Research the Differences in Using Different Root Canal Preparation Instruments for the Curving Root Canal;

不同根管预备器械对磨牙弯曲根管预备效果的CT研究

Manual Protaper Nickel Titanium File in the Application of Teeth after Bending Root Canal Preparation

Protaper手动镍钛锉在后牙弯曲根管预备中的应用

A Comparison Study on Endodontic Interappointment Emergencies(EIAE) between Protaper NiTi Instruments and Stainless Steel Hand-used Files in Curved Root Canal Preparation

弯曲根管预备使用Protaper镍钛器械与不锈钢器械急症发生的对比研究

Shaping Ability of Nickel-titanium Instruments in Curved Root Canals Preparation;

镍钛根管预备系统预备弯曲根管的成形效果

Comparison of Shaping Ability with Different Instruments in Preparing Curved Root Canals;

不同根管器械预备弯曲根管的效果比较

Comparison of ProTaper Crown-down Sequence and Hybrid Technique: Root Canal Preparation in Resin Stimulate Root Canal;

大锥度根管预备混合法在树脂弯曲根管中预备效率的研究

Effects of Methods for Preparation of Curved Canal on the Seal of Root Fillings in Vitro;

弯曲根管的预备方法对根管充填后根管封闭性影响的体外研究

Efficacy and Shaping Ability of Different Rotary Nickel-titanium Instruments in Curved Root Canals;

镍钛机用器械预备弯曲根管成形效果的研究

Fatigue Resistance of Nickel-Titanium Rotary Instruments with Different Cross-Sections

镍钛机用根管预备器械抗弯曲疲劳性能的比较

Clinical Study on Preparing Curved Root Canals of Molars with Hero 642 Nickel-titanium Rotary Instruments

机用镍钛Hero 642预备磨牙弯曲根管的临床研究

Clinical study of HERO642 nickel-titanium files in preparation of curved molar root canals

HERO642镍钛锉预备弯曲根管的临床应用研究

Comparative Study on Curved Root Canals Preparation with Profile Niti Rotary Instruments Protaper Niti Hand Instruments and Stainless Steel K-Files;

ProFile与ProTaper镍钛根管器械与不锈钢K锉预备弯曲根管的实验研究

A Study on the Use of the Profile Rotatory Device in Root Canal Preparation;

Profile机用镍钛根管器械预备弯曲根管的实验和临床研究

Efficiency of Rotary Nickel-titanium M2 Instruments, Rotary Nickel-titanium K3 Instruments Compared with Stainless Steel Hand K-file in Curved Root Canals

三种不同根管预备器械对弯曲根管的成形能力研究

Evaluation of apical transportation after shaping different curved root canals by Micro-CT

Micro-CT评价不同弯曲度根管预备后根尖偏移的实验研究

A comparison study on endodontic interappointment emergencies between protaper NiTi instruments and stainless steel hand-used files in curved root canal preparation

Protaper与不锈钢器械预备弯曲根管急症发生情况的对比研究

A comparison study of apical deviation of curved canals with ProTaper Nikel-Titanium hand-files and stainless steel K-files

ProTaper手动镍钛锉与手用不锈刚K锉预备弯曲根管效果对比研究

Continuous observation of canal aberrations in S-shaped simulated root canal prepared by hand-used ProTaper files

ProTaper锉预备S形弯曲模拟根管形态变化的连续观察