Yulan Street, High-tech Zone, Zhengzhou City, Henan Province, China.
1. Suitable for small diameter diamond core drilling, drilling large-diameter carbide project.
2. The drilling rig can be detachable, easy to move, suitable for use in mountainous area.
3. The clutch and gearbox of the drilling rig adopt EQ140 dongfeng auto parts. Therefore, it is very convenient to maintain and repair the drilling machine.
4. Equipped with sufficient instruments to display the situation in the hole. reasonable control handles, it is flexible and reliable for operating.
How does rotary drilling work?
Rotary drilling uses a rotating movement of a drill bit in order to generate wear in the ground (in order to drill into soft ground or mixed grounds):
- A rotary head, rotating thanks to hydraulic motors, is placed on a rig,
- a feed force is applied to the string,
- The rotary head makes the drill string to rotate,
- At the bottom of the drill string there is a bit, in contact with the ground, the bit creates the hole (the rotation of the bit generates wear).
- A fluid (water or drilling mud) is injected through the drill string till the bit. This fluid will flush the cutted material and bring them to the surface. - As the bit drills down, the rotary head goes down the rig. Then added rods are inserted in order to go till the desired depth.
For drilling in hard rocks, rotary drilling is usually not the most adapted technic, for this it's better to use a drifter (also called hard rock drill).
|power machine||Description||electric motor||diesel engine|
|Drilling capacity||drill pipe||reference drilling depth（m）|
|Wire-line drill pipe dia 55.5×4.75||1500|
|Wire-line drill pipe dia 71×5||1100|
|Wire-line drill pipe dia 89×5||900|
|drill pipe dia 54×6||1100|
|drill pipe dia 60×6||1000|
|gyrator||electric motor speed 1480r/
min Vertical spindle speed（r/min）
high speed 127；low speed 38
|vertical shaft diameter（mm）||91|
|winch||Lifting capacity (single rope speed)||40KN|
|Single rope three-layer lifting speed (m/s)||3.4、2.07、1.31、0.74、
|diameter of wire rope（mm）||dia.18.5|
|hydraulic system||Oil pump model||2CB-F32/11C-FL|
|Move car cylinder travel（mm）||500|
|Total weight（not include
Maximum Drilling Depth: 1500m
Drilling Diameter: BQ,NQ,HQ,PQ
Engine Power: 276kw