孕锒钻头孕锒金刚石钻头,对七种岩石类型进行了实验室试验,并在野外进行了二十一种不同的试验。回转速度、径向压力和扭矩必定会在钻头唇面的岩石中产生高应力,以便连续的破碎岩石,因而达到有效的进尺率。虽然较高的回转速度,对钻进较坚硬岩石是有效的,但高速会使钻头磨损较快。增加压 Pregnant 锒 头 孕 Pregnant 锒 diamond drill bits, laboratory tests of seven rock types and twenty-one different tests in the field. Swing speed, radial pressure and torque must create high stresses in the rock on the face of the drill bit to allow continuous rock crushing so that an effective lead-in rate can be achieved. Although higher swing speeds are effective for drilling harder rocks, high speeds can make the drill wear faster. Increase pressure