The Use of NQ Wireline Coring Core Barrel

The wireline coring core barrel is a drilling method for drilling the core from the drill pipe without lifting the drill. It has the characteristics of high drilling efficiency, good rock core quality, long bit life and low labor intensity. In actual work, the environment in which the rope drill is used is relatively harsh. Q series wireline core barrel have the advantages of simple structure, less wearing parts and high core-taking rate. The correct use of Q series wireline core barrel can reduce costs and improve work efficiency.

Application range
(1) Geological conditions
NQ rope core drilling tools can be used to drill a variety of formations and work best in hard rock formations in grades 6-9. Under the current technical conditions, it is generally not advisable to drill l0~12 grade rock, especially the extremely hard rock with dense rock structure and fine particles without grinding. When drilling into the above rock, the drill bit is extremely easy to wear, the drilling efficiency is extremely low, and the superiority of the NQ wireline coring core barrel cannot be fully utilized.
(2) Drilling depth
NQ rope core drilling tools can be used in shallow holes (100 ~ 300 m) and deep holes. The deeper the drilling, the better the economic and technical effect. The maximum depth of the NQ wireline coring core barrel should be judged according to the strength of the drill rod.
(3) Bit life
The NQ rope is used for core drilling. If the drill bit used is short in life and the drill bit is often drilled during the drilling process, it is easy to lose the meaning of using the core to drill.