During the operation several downhole complications took place, such as collar break, cone break off, drill pipe sticking, lost circulation, caving and eccentrically worn drill pipe.
该井在施工中发生了断钻铤、掉牙轮、卡钻事故和井漏、井壁失稳、钻具偏磨等复杂情况。
In the drilling process, the power spectrum of a drilling force is closely related to the drill wear.
在钻削过程中,钻削力功率谱与钻头磨损之间具有较强的相关性,被广泛用于钻头磨损监测,但是关于功率谱特征的提取和识别一直没有很好解决。
In this paper,the cutting force signals in different drill wear conditions are decomposed and reconstructed using wavelet transform; and the changing characteristics of cutting force signals of time domains in different frequency bands are obtained.
采用小波分析对钻头不同磨损状态的切削力信号进行分解与重构处理 ,获得了切削力信号在不同频段的时域变化特征 ,并分析了各个频段重构信号的方差随钻头磨损的变化规律。
AN APPLICABLE METHOD FOR ESTIMATION OF FORMATION DRILLING STRENGTH AND BIT WEAR
地层抗钻强度与钻头磨损实用评估方法
Artificial Neural Network Based Drill Wear Monitoring Using the Wavelet Decomposition of a Power Spectrum
基于功率谱小波分解的神经网络钻头磨损监测
Research on Drill Wear Monitoring Technology of the Multi-Feature Fusion Based on HMM;
基于HMM的多特征融合钻头磨损监测技术的研究
Study on Wear Regularity and Life of the Drill Based on Cryogenic Treatment;
基于深冷处理的钻头磨损规律及其寿命研究
Wear Characteristic of Twist Drills in Cutting Machinable Ceramics;
可加工陶瓷切削中钻头磨损特性的研究
Research on Drill Wear Monitoring Technology Based on HMM by Using the Force and Noise Signal;
基于钻削力和噪声信号的HMM钻头磨损监测技术研究
Research on Drill Wear Condition Monitoring Technology Based on the Drilling Force Signal;
基于钻削力信号的钻头磨损状态监测技术的研究
RESEARCH ON A MATHEMATICAL MODEL OF DEEP-WELL DRILLING PROCESS CONTROL BASED ON WEARING FUNCTION OF DRILL BIT
基于钻头磨损函数的深井钻进过程控制数学模型的研究
Its main functions are maintaining borehole gage,improving drill string stability and protecting lower drill string from excessive wear.
其重要作用是保持钻头尺寸符合标准，提高钻杆稳定性，避免钻杆下部过于磨损。
bit cutting angle
钻冠的尖度，钻头磨角，钎子头刃角
The Study on Wear Regularity, Design and Performance Test of Diamond Bit and Diamond Saw
金刚石钻头和金刚石锯片磨损机理、设计及性能测试研究
EXPERIMENTAL STUDY OF ABRASIVE-CORROSIVE WEAR OF MUD PUMP LINER
钻井泵缸套材料磨料—腐蚀磨损实验研究
Study on Nozzle Wear Mechanism and Drilling Test of Swirling Abrasive Water Jet;
旋转磨料射流喷嘴磨损机理与钻孔试验研究
The chain has fretted into the wood and damaged it.
铁链已经把木头磨损了。
he was in the forefront; he was at the head of the column.
钻杆的最前部都已经磨损了。
Development of Abrasive Water Jet Drilling-cutting Aiguille and Experiment Study on Cutting Performance of Abrasive
磨料射流钻割一体钻头研制及切割特性研究
AN APPLICATION OF ABRASIVE WATERJET INTO CUTTING OF CONE BIT
磨料水射流在切割牙轮钻头中的应用
Design and Research of PC-Based Micro Drills Grinder
PC-BASED微型钻头磨床的研究与开发