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    Low compressive strength, high drillability of very soft formation using cone bit Jiangsu Xinrui production
    share  | 20-03-20release views ID：67571
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Low compressive strength, high drillability of very soft formation using cone bit Jiangsu Xinrui production
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牙轮钻头：以牙轮钻头的结构为依据，可以将其分为水眼、轴承、巴掌、牙轮以及钻头体这五个部分。如果是密封喷射式的牙轮钻头，在一般情况下还包括储油补偿系统这一部分。螺纹一般会在牙轮钻头的上部，钻柱与螺纹进行相互连接，钻头下部会存在牙轮，其上带有三个巴掌，牙轮轴上装上牙轮，牙轮轴与各个牙轮之间装有轴承，牙轮会通过其自身所带的切削齿进行破碎岩石工作。钻井液的通道就是钻头的水眼。在进行石油钻井工作的过程中，通过钻进过程中的横向剪切作用、纵向振动作用，牙轮钻头会实现破碎岩石的目的，从而能够提升钻井速度。在选择牙轮钻头当做石油钻井工具时，需要按照钻井设备的实际情况、地层的实际条件以及相邻油井的地质资料、地层资料来进行牙轮钻头的选型。在进行选择时，需要考虑的问题主要有以下几点：
首先，应考虑钻井地层中的软硬交错情况是否存在；其次，应考虑在石油钻井工作中是否需要防斜钻进、曲线作业；
再次，应考虑同一油井中的不同钻进井段的实际深浅情况；

然后，应考虑钻井地质、地层的可研磨性以及软硬程度 。



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