“磨鞋”是钻探单位用以磨去井下落物(钻杆、钻头、牙轮或其它工具)的一种工具。为了提高其使用寿命,需要在其底部堆焊一层硬质合金(钨钢)粉末,以形成磨齿形堆焊层。通常是采用氧乙炔焰进行堆焊的。但由于磨鞋的体积较大,只能选用能率最大的H01-30焊炬对其加热,因而氧气的耗量很大。 “Abrasive shoes” is a tool used by drilling units to wipe down well-litter (drill rods, bits, rollers, or other tools). In order to improve its service life, a layer of cemented carbide (tungsten steel) powder needs to be deposited on the bottom thereof to form a grinding tooth surfacing layer. Oxygen acetylene flame is usually used for surfacing. However, due to the larger size of grinding shoes, only the most energy-efficient H01-30 welding torch can be used to heat it, so the consumption of oxygen is very high.