Commodity: Tapered Drill Rods
Degree: 7°, 11°, 12°
Shank of bit: H19*82mm, H22*108mm, H25*159mm
Lengthes: 500mm - 10000mm
We can also supply the drill rods according to the customer's detailed requirements.
Intruction:
We mainly produce hollow steel and hollow drill rods, hollow steel mainly adopts large-cross-section rolled square billets and 150*150 continuous casting billets, namely drilling and cored rolling process. The products are always in a controlled condition during production with stable quality.
The yearly output of hollow steel is 30000 tons to 50000 tons, which are widely used to mining, the engineering construction of highways, railways and tunnels, the engineering construction of national large-sized hydropower stations and nuclear power stations, etc.
Operating guide:
1.Please choose the right products according to the use terms and conditions.
2.The normal tapered butten bit is 7 degree, if the user require other taperer butten bit, we can design it for you.
3.If the hole depth is deeper than 2.5m, please use the set of rods, firstly,using shorter drill rods, then the loner rods, which can improve the life of rods; For example,if you want to open a 5m depth hole, you should take 1m,2m,3m,5m, totally four pieces rods; If you want to open a 6m depth hole, you should take 1m,2m,3.5m,5m,6m, totally five pieces rods.
4.Take attention to the stability when drilling, reduce blow rate suitably,avoid to work under the bending condition.
According to the working condition, if the rod is easily to stuck to the stratum, cross bit is the better choice or just need to adjust the air volume of drilling rig to make sure that the drilling row power is normal.