一种大扭矩钻杆制造技术

本实用新型专利技术的一种大扭矩钻杆，是由一根以上的钻杆依次套叠构成，在每根钻杆的端面上均增设了端面键。每根钻杆的内键槽和外键条均为梯形。其中,最里层钻杆的长度最短。本实用新型专利技术的一种大扭矩钻杆，结构设计合理、克服了钻杆端面断裂、扭曲变形、造成卡管事故，延长了设备的使用寿命，提高了经济效益。内外键的使用，防止钻杆卡管和开裂等质量事故的发生；产生径向分力，保证每节钻杆自动定心对中，改善每节钻杆的工作环境，更好地提高钻杆的工作能力，传递扭矩的内外键接触面增大，有效地降低了键面单位载荷，提高了内外键的承载能力；避免内外键线接触的发生。（*该技术在2021年保护过期，可自由使用*）

Large torque drill pipe

The utility model relates to a large torque drill rod, which is formed by stacking more than one drill rod in turn, and the end face of each drill rod is provided with an end face key. The inner keyway and foreign key strip of each drill rod are trapezoidal. Among them, the length of the innermost drill rod is the shortest. The utility model relates to a large torque drill rod, which has the advantages of reasonable structural design, overcoming the fracture of the end surface of the drill rod, twisting and deformation, causing the pipe clamping accident, prolonging the service life of the equipment and improving the economic benefit. The use of internal and external keys, to prevent the drill pipe and card cracking and other quality accidents; produce radial force, ensure each drill pipe automatic centering on, improve the working environment of each section of the drill pipe, drill pipe to improve the working ability, and key contact surface transfer torque increase, effectively reducing the key surface unit load to improve the bearing capacity of the key, inside and outside; avoid internal and external key line contact.

【技术实现步骤摘要】

【技术保护点】
１．一种大扭矩钻杆，是由一根以上的钻杆（１）依次套叠构成，其特征是在每根钻杆的端面上均增设了端面键（２）。

【技术特征摘要】

【专利技术属性】
技术研发人员：王永智，武玉科，
申请(专利权)人：王永智，
类型：实用新型
国别省市：23