三牙轮钻头井底破碎试验及井底模式初步分析

• 作 者: 侯季康 罗肇丰
• 机 构: 西南石油学院钻头研究室,西南石油学院钻头研究室
• 出 处: 西南石油学院学报
• 发表日期: 1980年01期
• 关键词: 井底 三牙轮钻头 破碎岩石 软地层 钻压 纯滚动 平均机械钻速 移轴 凸起部分 顶距

本文对五种不同类型的牙轮钻头在实验架上所作的井底破碎试验进行了分析比较。并根据它们的井底模式,研究分析其破碎岩石的效果。硬地层钻头采用不等距布齿,软地层钻头采用较大的移轴距和超顶距,可提高钻头破碎岩石的能力。由井底模式的研究分析还证明了三牙轮钻头的牙轮运动为变速转动。钻头钻进时,纯滚动点在牙轮上的位置是变化的,其变化规律主要取决于钻头的结构特点。

In this paper, five different types of roller cone bit in the experiment on the bottom of the broken test were analyzed and compared. And according to their bottomhole pattern, study and analyze the effect of crushing rocks. Hard formation bit with unequal distance cloth teeth, soft formation bit with a larger shift wheelbase and super-top distance, can improve the drill bit rock ability. The analysis of the bottom hole pattern also proves that the roller cone movement of the tricone bit is variable speed rotation. When the drill bit is drilling, the position of the pure rolling point on the roller cone is changed, and the variation rule mainly depends on the structural characteristics of the drill bit.