Black API 3 1/2''REG QL50 DTH Hammer With Foot Valve

Product Specification

Black Color Ql50 DTH Drill Hammer With Footvalve for Rock Drilling And Blasting

Product description

Down-the-Hole drilling is one of the fastest, most dominant methods of geotechnical drilling. DTH drilling has many applications, including water well, oil and gas, blast hole and foundation drilling. This is an energy efficient form of wide-hole drilling (in the hole range of 100-254 mm) that can be performed in both a downward and an upward direction.

Working Principle

The drill pipes transmit the necessary feed force and rotation to hammer and bit plus compressed air or fluids for the hammer and flushing of cuttings. The drill pipes are added to the drill string successively behind the hammer as the hole gets deeper. The piston strikes the impact surface of the bit directly, while the hammer casing gives straight and stable guidance of the drill bit.
Working of DTH The impact energy therefore is not lost in joints allowing for much deeper percussion drilling. This means that the impact energy does not have to pass through any joints at all. 

DTH Hammer specification:

Product Advantages:

1. Out of the trouble of foot valve fracture and expansion and contraction.
2. Lower energy consumption and higher impact frequency. The drilling speed is 15%-30% higher than the one with foot valve.
3. Simple structure, reliable parts, long life, easy and cheap maintenance.
4. Lower air and oil consumption. The oil consumption is about 10% lower than the one with foot valve.

Face shape Features

Drop Center

For high penetration rates in soft to medium hard and fissured rock formations. Low to medium air pressures. Maximum hole deviation control.

Concave Face

The all-round application bit face special for medium hard and homogenerous rock formations. Good hole deviation control and good flushing capacity.

Convex Face

For high penetration rates in soft to medium-hard with low to medium air pressures. It is the most resistance to steel wash, and may reduce the load and wear on the gauge buttons, but poor hole deviation control.

Flat Face

This kind of face shape is suitable for very hard and abrasive rock formations in applications with high air pressures. Good penetration rates an resistance to steel wash.

Double Gauge Face

This kind of face shape is suitable for fast penetration rates in medium to hard rock formations. Designed for high air pressures and good resistance to steel wash step gauge bit.

Product application

At present, DTH drilling tool is widely used in underground mining, quarries, hydraulic and Hydro-Power Engineering, water well drilling, Mineral exploration, anchoring hole drilling, geothermal engineering, Subway excavation, another civil engineering.

DTH is one of the most efficient ways of drilling rock, using a rapid hammer action to break the rock into sizeable chips which are then evacuated from the bore hole by the air exhausted from the DTH Hammer. The technique provides fast drilling of accurately aligned, straight and clean holes in most ground conditions.

Company informaiton

At sollroc, customer satisfaction is our top priority. Our sales team takes a proactive approach in meeting customers’ needs. We take the time to get to know you and learn about your operations so we can better assist you. We strive to meet customers’ needs by supplying the tools and equipment you need when you need them, providing product support, and following through with excellent customer service every step of the way.