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The Wassara technology uses water to power the down-the-hole (DTH) percussion hammer. This makes it the superior choice for many drilling applications where air-powered DTH hammer, top hammer or rotary drilling equipment are normally used.

The DTH hammer

The Wassara hammer is ideal for use in hard, stable rock drilling applications and overburden drilling applications that require casing systems. Compared to conventional air-powered DTH hammers or top hammers, water-powered DTH hammers offer a wide range of advantages, including low energy consumption, a cleaner environment, minimal hole deviation, deeper drilling capabilities, a high power output ratio and minimal impact on the surrounding ground.

Wassaras DTH hammer consist of only two moving parts: the piston and the valve. With so few moving parts, the smart solution delivers reliable high performance drilling in the most challenging conditions. Water, at up to 180 bar delivery pressure, is used to power the impact mechanism of the hammer at a high frequency rate. When the water leaves the hammer, it loses the pressure and keeps a low flush velocity. This however is still adequate to bring any cuttings to the surface and clean the borehole. Additionally, the hydrostatic column, which is created above the hammer, helps to keep the hole stable while preventing potential collapse. This also prevents water from being drawn into the borehole, which increases hole stability and prevents potential environmental issues.

Hammer range

Ø Hole size Hammer Water
consumption
Max operating
pressure
61 / 64 mm
(2.4 / 2.5")
W50 (2") 55 - 160 l/min
(15 - 42 USgpm)
 180 bar
(2610 psi)
Ø 82 / 89 mm
(3.2 / 3.5")
W70 (3") 80 - 270 l/min
(20 - 70 USgpm)
 180 bar
(2610 psi)
Ø 95 / 102 mm
(3.7 / 4.0")
W80 (3.5") 70 - 270 l/min
(18 - 70 USgpm)
 180 bar
(2610 psi)
Ø 115 / 120 / 127 mm
(4.5 / 4.7 / 5.0")
W100 (4") 130 - 354 l/min
(35 - 94 USgpm)
180 bar
(2610 psi)
Ø 130 / 140 / 152 mm
(5 / 5.5 / 6.0")
W120 (5") 175 - 445 l/min
(45 - 118 USgpm)
180 bar
(2610 psi)
Ø 165 / 178 / 190 / 203 mm
(6.5 / 7.0 / 7.5 / 8.0")
W150 (6") 270 - 570 l/min
(70 - 150 USgpm)
180 bar
(2610 psi)
Ø 216 / 254 mm
(8.5 / 10")
W200 (8") 470-670 l/min
(125-180 USgpm)
150 bar
(2175 psi)

Hammer range

Ø Hole size Hammer Water
consumption
Rec. operating
pressure
Max grout
pressure
Ø 153 / 165 mm
(6 / 6.5")
W100JG 130 - 354 l/min
(34 - 94 USgpm)
150 bar
(2175 psi)
500 bar
(7252 psi)