煤矿用钛合金无磁钻杆的中试研究

Pilot-scale Study on Titanium Alloy Drilling Rod in Coal Mine

摘要:

目前，国内外煤矿坑道水平定向钻探用无磁钻杆材料均选用铍铜QBe2（C17200），该合金材料的延伸率低，钻杆易出现断裂事故。为解决这一问题，研究了高强度钛合金钻杆，探讨了钻杆的材料选择及螺纹结构设计。试验了钻杆的加厚工艺，其强度达到了设计要求，并通过现场试验验证了钻杆的使用效果。

Abstract:

At present, beryllium copper non-magnetic drilling rod material is used for horizontal directional drilling in coal mine tunnel both in China and abroad. Because of the low elongation of this alloy material, the drilling rod is easy to be broken. In order to solve this problem, high strength titanium alloy drill rod is developed; the material selection and the drill pipe thread structure design were discussed. The tests on upsetting process show that the strength is up to the design goal and the field tests verify the application effect of the drilling rod.