The drill rig accessories How to replace the drill bit after a certain period of time underground work, scraper blade drill diameter smaller, shorter, blunt, rock crushing capacity will become weak, slowing progress;? Cone bit due to the erosion of tooth wear , bearing damage, can cause the cone rotation is not flexible or cone stuck rig service, the torque is increased, if not from the accident will occur off the cone; diamond drill due to the formation of inhomogeneities caused by the drill bit PDC occurred crack, break, off the drilling footage is also slow. To speed up the pace of drilling wells whole, must be replaced with the old drill, but the drill is a few hundred meters of underground drilling workers how to replace the drill bit it ? When drilling, power drill driven turntable, kelly, drill and drill bit rotation, after comprehensive judgment, if deemed drill is worn, replace the drill bit must be stopped immediately. Stop after drilling to continue for some drilling fluid circulation time, the purpose is to adjust the performance of the drilling fluid and the cuttings suspended in the drilling fluid out of the ground, the cycle of the new wall of the wellbore stability, but also for drilling equipment for routine checks. Workers drilling derrick on the use of the crane, traveling block and hook rigs, according to the height of the derrick by post (usually composed of two or three drill composition) from the well since the entire drill. drill column from the rear of the press order of discharge submersible drilling rig in the derrick, at the same time raise the underground drill rig Shandong column, use the drilling pump drilling fluid infusion to keep the annular space, the purpose is to keep the liquid level does not fall within the wellbore so that the pressure within the wellbore to balance formation pressure to prevent wall collapse or downhole formation fluid into the wellbore while paying particular attention to the wall because of the reduced diameter sticking may occur, the operator should be strictly controlled to enhance the speed of the entire drill wellbore, After starting the drill collars, replace the drill will also act out the workers after removing the old drill bit mounted on a new column and press the original order to be restored after the well drilling overseas drilling rig drilling method 1, a mud rotary drilling method (rotary drilling, mud holes for wash medium). This is a basic drilling methods. 2, an air rotary drilling method (rotary drilling, compressed air for cleaning the porous medium). This drilling method mainly dry or dry with a dry area, and the permafrost, severely leaking formations. This method is more efficient footage. Shandong rig, Long industry machinery (online consultation), the rig by Dragon Machinery Co., Ltd. Shandong. Machinery Co., Ltd. Shandong Long (www.longyejixie.com) is Tai'an, engineering machinery parts leaders, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Lung industry machinery leadership with the staff warmly welcome all inquiries negotiations to create the dragon industry machinery better future.