Model: B 19
Thread: M 14* 1.5
Brand: Zhongmei
Square tooth: 16*6
Length: 0.50m * 2.50m.
B 19 drill pipe instructions
1, according to the test comparison or the product recommendation of our factory, correctly select the drill pipe model.
2. The company's tapered brazing products have the trademark "G" on the rod body and collar plate. Seen from the end of the rod body, the opening of the collar plate is concave to the right, and the rod body is convex. Excellent brazing marks are "G ~" and "G", and common brazing marks are "G- 1".
3, should ensure that the drill pipe and bit cooperate well (consistent taper); If the taper of the drill pipe is smaller than that of the drill bit, the tip is easy to break.
4. For drilling depth >; 2.0 meters, it is suggested to use a set of drill pipes, that is, first open a hole with a short drill pipe, and then continue to extend the hole with a long drill pipe to improve the service life of the drill pipe (depending on the hole depth, 2 sets of drill pipes or 3 sets of drill pipes can be used).
5. When spudding, it should be smooth, and the propulsion air volume should be reduced appropriately to avoid the drill pipe working in bending state, otherwise the service life of the drill pipe will be shortened.
6, in the process of drilling and exit, try to avoid bending stress of drill pipe, in order to improve the service life of drill pipe.
7, should according to the site conditions (rock), adjust the air volume of the rock drill, to ensure the normal work of the rock drill.
8. For the stuck rock, cross drill should be used.
9. Users shall not arbitrarily change the structure of drill pipes or use them after reprocessing, so as not to affect the normal service life of drill pipes.
10, ordinary drill pipes are prone to early fracture in batches during normal use, so superior drill pipes should be used instead; When the best drill pipe is not used, the large drill pipe should be replaced or the wind pressure should be reduced.
1 1, the diameter of the drill pipe body should match the power of the rock drill, and large-size drill pipes should be selected for high power.