PDC drill bit. In order to overcome the shortage of drilling speed, unstable work hard in drilling complex strata in the drill, the utility model is provided with a crown at the front end of the non-uniform distribution of the two main wing and side blade, knife wing mounted between the two main blades, a cutter fixed wing and side. The knife wing, adjacent blade debris flow, debris flow along the drill body provided with axial nozzle, the two main wing of the shoulder in 180 degrees is arranged in the crown on the front, between the two main wing of the installation of two side blades; debris flow road side angle between adjacent blades are 20 degrees to 35 degrees; a single row of cutting teeth fixed wing and side blade on the knife; after the inclination of the main cutting teeth near the core of the side cutting teeth near the angle is less than the width of the shoulder; main blades and vice blade of the same. The utility model has the advantages that the structure is reasonable, the work is stable, the service life of the drill bit is effectively prolonged, and the drilling cost is lowered.
【技术实现步骤摘要】
PDC钻头
本技术涉及一种石油钻井、地质勘探、油田开发钻进的破岩工具钻头,尤其是涉及一种PDC钻头。
技术介绍
在软硬交错复杂地层钻进中,通常采用牙轮钻头和普通PDC钻头施工,牙轮钻头钻速低、PDC钻头工作不平稳,切削齿金刚石层前期崩损严重、进尺少,导致钻井作业周期长,钻井成本高。
技术实现思路
为了克服在软硬交错复杂地层钻进中存在的钻头钻速低、工作不稳定的不足,本技术提供一种PDC钻头,该PDC钻头适于复杂地层的钻进。本技术解决其技术问题所采用的技术方案是:PDC钻头的钻头体前端钻头冠上有刀翼,后端为连接螺纹,刀翼下部是保径,保径上安装有保径齿,钻头冠前端部设置有非均匀分布的2个主刀翼和副刀翼,副刀翼安装在两个主刀翼之间,主刀翼和副刀翼上固定安装有切削齿,相邻刀翼之间有岩屑流道,岩屑流道上沿钻头体轴向安装有水嘴,2个主刀翼的肩部在钻头冠前端面上呈180°排列,2个主刀翼之间各安装有2个副刀翼;相邻刀翼之间岩屑流道侧面的角度为20°?35° ;。主刀翼与副刀翼上固定安装有单排切削齿;靠近芯部的主切削齿后倾角小于靠近肩部的副切削齿的后倾角。主刀翼、副刀翼的宽度尺寸相同。主刀翼、副刀翼的宽度尺寸为50mm。岩屑流道上沿钻头体轴向安装的水嘴为可换水嘴。本技术的有益效果是,结构合理、工作平稳,有利于提高钻头的抗冲击和耐研磨性能,有效延长钻头的使用寿命,降低钻井成本,满足复杂地层钻进需要。【附图说明】图1是本技术PDC钻头的结构示意图。图中:1.钻头冠,2.主刀翼,3.可换水嘴,4.岩屑流道,5.主切削齿,6.副切削齿,7.副刀翼。【具体实施方式】下面结合附图和实施 ...
【技术保护点】
一种PDC钻头,钻头体前端的钻头冠上有刀翼,后端为连接螺纹,刀翼下部是保径,保径上安装有保径齿,钻头冠前端部设置有非均匀分布的2个主刀翼和副刀翼,副刀翼安装在两个主刀翼之间,主刀翼和副刀翼上固定安装有切削齿,相邻刀翼之间有岩屑流道,岩屑流道上沿钻头体轴向安装有水嘴,其特征是:所述2个主刀翼(2)的肩部在所述钻头冠(1)前端面上呈180°排列,2个主刀翼(2)之间各安装有2个副刀翼(7);相邻刀翼之间岩屑流道(4)侧面的角度为20°~35°;所述主刀翼(2)与副刀翼(7)上固定安装有单排切削齿;靠近芯部的主切削齿(5)后倾角小于靠近肩部的副切削齿(6)的后倾角;所述主刀翼(2)、副刀翼(7)的宽度尺寸相同。
【技术特征摘要】
1.一种PDC钻头,钻头体前端的钻头冠上有刀翼,后端为连接螺纹,刀翼下部是保径,保径上安装有保径齿,钻头冠前端部设置有非均匀分布的2个主刀翼和副刀翼,副刀翼安装在两个主刀翼之间,主刀翼和副刀翼上固定安装有切削齿,相邻刀翼之间有岩屑流道,岩屑流道上沿钻头体轴向安装有水嘴,其特征是: 所述2个主刀翼(2 )的肩部在所述钻头冠(I)前端面上呈180 °排列,2个主刀翼(2 )之间各安装有2个副刀翼(7);相邻刀翼之间岩...
【专利技术属性】
技术研发人员:郭俊磊,冯义,肖华,曾贵蓉,何飞,杨立军,吉林,辛亮,
申请(专利权)人:中国石油集团渤海石油装备制造有限公司,渤海石油装备天津中成机械制造有限公司,吐哈石油勘探开发指挥部,
类型:实用新型
国别省市:
还没有人留言评论。发表了对其他浏览者有用的留言会获得科技券。