Center Rock Inc
Our rock drills have been used by some of the nation’s largest building, roadway, and mining contractors to quickly drill holes to the exact size required by their specifications.
Center Rock offers one of the most complete lines of down the hole drills and downhole bits ranging from 3.5” – 36” (89mm – 914mm) which are designed for peak performance in all rock drilling applications including but not limited to; foundation & geotechnical drilling, blasthole drilling in quarries & mines, waterwell & geothermal boreholes, oil & gas underbalanced drilling, horizontal directional drilling, and utility transmission & distribution rock sockets.
At Center Rock, our priority is to get you down the hole safely, productively, and efficiently.
ROTO LOC® is an overburden drilling system for casing advancement, developed by Center Rock, Inc. With wings that lock in place and are easily retractable, ROTO LOC® is able to drill straight, full diameter holes through any formation, including pinnacle limestone and karst. ROTO LOC® saves you money because there isn’t any expensive starter casing J-teeth or ring bits needed.
ADVANCED DESIGN ROTO LOC® UNDERREAMER SYSTEM
Sizes from 5 1/2″ to 36″ (140-914 mm)
Wings lock in place to cut full diameter through any rock formation
No expensive starter casing teeth or ring bit left in the hole
Easily retractable wings
Straight holes in pinnacle limestone and karst, eliminating bent or broken casing
Positive locking wings can be used to retrieve casing.
Simple, quick wing replacement.
HOW IT WORKS
As the pilot bit rotates and makes contact with the ground, the drive pin rotates into locked position and the wings are fully extended. While in this position, the wings are positively locked, ensuring that the pilot will drill a borehole to full expanded diameter until retracted. The long nose on the pilot leads/guides the tooling through sloping and karstic formations maintaining the desired angle and minimizing deviation. When the target is reached, with a slight bump backwards, the pin moves to the retract position allowing the wings to collapse in. At that point, the bit is retracted from the casing, leaving the casing behind.
ROTO LOC® is the ultimate under reamer system. It delivers straighter holes, minimizes casing friction which can cause casing failures, requires NO expensive casing teeth, and provides industry-leading penetration rates.
WHY WASSARA WATER HAMMERS?
Safe and environmentally friendly drilling
Exceptional bore hole quality and accuracy
Cost-effective, versatile, and efficient performance
Safe and Environmentally Friendly Drilling
Wassara’s water hammer drilling technology minimizes the amount of pressure applied to the rock formation. As a result, there’s virtually no chance of disturbing surrounding and adjacent structures. The groundwater table is also not impacted in any manner.
Exceptional Bore Hole Quality and Accuracy
Wassara water hammer products produce straight and accurate bore holes. How?
Clearance is extremely tight between the drillstring and the hole.
Hydrostatic pressure of the water column ensures stability.
The water’s low upward velocity prevents formation of cavities. That means clean and smooth holes.
Cost-Effective, Versatile, and Efficient Performance
Since Wassara products are water-powered, drilling through water-rich formations is obviously never a problem. But, actually, Wassara hammers go effortlessly through almost any material, from boulders to wood to dense clay, easily, cost-effectively, and quickly.
Wassara water hammers consume up to 80% less energy versus most air-powered drilling systems. Our tools also last far longer due to the very low upward water velocity required.
Because only pure water is used to power our hammers – and no oil is needed for lubrication – no damaging emissions are produced. No oil gets into the groundwater; no dust gets into the air, resulting in a cleaner, safer, work environment.
JET GROUT HAMMERS
Jet grouting is a ground stabilization procedure which uses the principle of high velocity injection of cement grout into the ground. Jet grouting is the only type of grouting that is capable of treating all types of soils, from clays to gravel. The technique creates in situ geometries of grouted soil, using a grouting monitor followed by a rotary drill bit, attached to the end of the drill string.
After drilling to desired depth, a grout jet with high velocity is initiated from nozzles mounted in the side of the monitor. The jets erode and mix the in situ soil as the drill string and jet grouting monitor are rotated and raised slowly, forming columns.
CRI LINE OF DTH BITS
Nothing is more important to rock drilling success than drill bits that cut straight and fast through all types of rock. That’s why we offer our customers the best value in rock drill bits. Center Rock has a full range of face designs, button configurations, and shank styles in many sizes up to a 48” (1219 mm) head, to match application and rock they are drilling in.
WHY CRI BITS
Made from premium alloy steel and high quality tungsten carbide.
Heat treated and shot peened to deliver a durable and reliable balance of strength and toughness.
Large bit forgings are individually ultrasonically tested and screened for inclusions and flaws.
Specially designed bits for any application. Challenge us!
Multiple varieties of head, face, shank and inserts available.
Advanced flow simulation used to improve chip removal and reduce noise.