In geological work, the use of drilling equipment Roller Reamers Drilling Manufacturers to drill into the ground smaller diameter greater depth columnar hole, known as drilling. Drilling diameter and depth sizes, depending on the purpose and mineral drilling depth of burial. Drilling for oil, natural gas and groundwater drilling diameters Hydraulic mechanical double acting drilling jar are larger. The main functions are: ① get underground kind of information that take core drilling core taken from drilling, mine heart, debris, liquid-like, gas-like and so on. ② as geophysical logging channel, get all kinds of rock Mandrel sub for drilling jar layers geophysical field data. ③ observation as an artificial channel aquifers hydrogeological dynamics. ④ used for exploration, mining combine, develop groundwater, oil and gas, geothermal drilling.