Badger exploration is a novel drilling technology that removes the need for a fixed rig and can achieve drilling without drill strings and drilling fluid. To achieve bit cooling during badger drilling, this paper proposes a self-cooling bit that can achieve self-cooling based on transpiration cooling technology. The self-cooling bit is characterized by the coolant chambers, capillary tubes and transpiration holes, the coolant can be pumped to flow through capillary tubes and transpiration holes to absorb the cutting heat and reduce the temperature of the cutters during drilling. The transpiration cooling model of the self-cooling bit cutter is developed theoretically, liquid metal is chosen as the coolant, and numerical simulations are conducted to investigate the cooling process of the cutter. Finally, a simplified self-cooling bit is built and tested in a rock breaking experiment, and the experimental results show that the temperature of the self-cooling bit cutter can be reduced significantly and maintained at a low value during the rock-breaking process, verifying the feasibility of the self-cooling bit. Analysis of the experimental results obtained with different parameters shows that the radial transpiration holes, the small size transpiration holes and the high flow rate of coolant are conducive to cutter cooling and promote the full and rapid absorption of the cutting heat by the coolant. The above work is helpful for the improvement and application of badger exploration technology.

ger勘探是一种新颖的钻井技术，无需固定钻机，无需钻柱和钻井液即可进行钻井。为了实现badge钻孔过程中的钻头冷却，本文提出了一种基于蒸腾冷却技术的自冷却钻头，该钻头可以实现自冷却。自冷却钻头的特征在于冷却剂腔，毛细管和蒸腾孔，冷却剂可被泵送以流过毛细管和蒸腾孔，以吸收切削热并降低钻削过程中刀具的温度。从理论上开发了自冷却钻头的蒸发冷却模型，选择液态金属作为冷却剂，并进行了数值模拟，研究了钻头的冷却过程。最后，在凿岩实验中构建并测试了简化的自冷钻头，实验结果表明，在凿岩过程中，自冷钻头刀具的温度可以显着降低并保持在较低的水平，从而验证了自冷钻头的可行性。对不同参数得到的实验结果的分析表明，径向蒸发孔，蒸发孔尺寸小，冷却液流速高，有利于刀具冷却，促进冷却液充分，快速地吸收切削热量。以上工作对of探技术的改进和应用是有帮助的。实验结果表明，在凿岩过程中，可以大大降低自冷钻头的温度，并保持较低的温度，验证了自冷钻头的可行性。对不同参数得到的实验结果的分析表明，径向蒸发孔，蒸发孔尺寸小，冷却液流速高，有利于刀具冷却，促进冷却液充分，快速地吸收切削热量。以上工作对of探技术的改进和应用是有帮助的。实验结果表明，在凿岩过程中，可以大大降低自冷钻头的温度，并保持较低的温度，验证了自冷钻头的可行性。对不同参数得到的实验结果的分析表明，径向蒸发孔，蒸发孔尺寸小，冷却液流速高，有利于刀具冷却，促进冷却液充分，快速地吸收切削热量。以上工作对of探技术的改进和应用是有帮助的。较小的蒸发孔和高流速的冷却剂有利于刀具冷却，并促进冷却剂充分而迅速地吸收切削热量。以上工作对of探技术的改进和应用是有帮助的。较小的蒸发孔和高流速的冷却剂有利于刀具冷却，并促进冷却剂充分而迅速地吸收切削热量。以上工作对of探技术的改进和应用是有帮助的。