热压铁基孕镶金刚石钻头的试验研究

Experiment Study on Hot-pressing Iron-based impregnated Diamond Drilling Bit

摘要:

针对在坚硬致密岩石中钻进时效低和钻头使用寿命短的技术难题，分析了热压钻头的金刚石出刃与岩石研磨性等岩性之间的内在联系，认为钻头的胎体成分及其性能是关键，硬而带脆性的胎体性能有利于金刚石出刃，从而能提高钻进速度。因此，从热压金刚石钻头的胎体成分与性能研究入手，经过反复的试验研究，试制出了热压铁基孕镶金刚石钻头，取得了突破性的进展。在坚硬致密岩层中钻进，钻进时效由0.5 m左右提高到1.17 m，钻头寿命由10 m左右提高到21.31 m，解决了在坚硬致密岩层中钻进难的问题。试验研究结果说明，铁基合金是一种新型的金刚石钻头胎体材料，热压铁基孕镶人造金刚石钻头是一种新类型的金刚石钻头。

Abstract:

According to various of the technical difficulties such as low drilling efficiency in hard rock and short service life of diamond drilling bit, analysis was made on the inherent links between blade-extruding of hot-pressing diamond and rock abrasiveness. The matrix and properties were considered to be important factors, so starting with the research on matrix and properties of hot-pressing diamond drilling bit, hot-pressing iron-based impregnated diamond drilling bit was developed. Drilling in hard and compact rocks, the efficiency increased from about 0.5 m/h to about 1.17 m/h, and the service life was extended from 10 m/each to 21.31 m/each. It was proved that iron-based alloy is a new matrix material of diamond drilling bit and hot-pressing iron-based impregnated diamond drilling bit is a new type of diamond drilling bit.