Around the world, water well rig owners and operators appreciate the Atlas Copco T2W truck-mounted drilling rig for its application versatility, high productivity and ability to get in and out of even the most rugged conditions.
The T2W rig’s three-speed rotary head has 3,500 foot-pounds at 275 rpm and 12,000 foot-pounds of torque at 80 rpm. Onboard air comes in a variety of options, which include up to a 900/350 air compressor. Coupled with a 500 hp (372 kW) engine for 900 psi air, 30,000-pound (13,607 kg) pullback capability and 15,000-pound (6,803 kg) hoist, and you have an incredible range of capability from a rig designed for both air and mud applications.
That’s why it’s not unusual to find a T2W contractor one day rotary drilling the top 24-inch diameter of a municipal water well’s profile, setting 18-inch steel casing, and finishing that well to depth with a 15-inch pneumatic hammer—and then the very next day find him in a residential district slipping his rig in between two houses to drill a geothermal loop field where larger truck-mounted rigs won’t fit.
The T2W rig’s characteristic versatility and robust design have not changed in three generations of the model, but more features have been included in the new Series III upgrade than any machine in its class. That the rig is so popular is no surprise, as most of these features came directly as a result of driller feedback and recommendations.
12-rod carousel with backloading capability from a 12-rod box
With applications such as geothermal loop field drilling in mind, the Series III carousel capacity was bumped up to 12 rods. Together with a rig-mounted rod box, which carries another 12 sticks of 3.5-inch rod, total depth capacity is 480 feet without having to bring a pipe trailer to crowded jobsites. The carousel itself is a swing in/swing out type. During transport the carousel folds over the derrick to lie balanced over the truck’s center line for improved road handling. The carousel has backload capability during operation, so it allows easy single-person operation, depending on the situation. Since the carousel brings pipe to the top head, the top head only has to travel in one direction to clear the way for handling pipe with the main hoist, auxiliary hoist or sand reel. Consequently, this gives operators the utmost confidence of perfect alignment every time they bring the top head back to center against a positive stop.
One option is a gear-driven head constructed with oversized gears, shafts and bearings for large torque applications. The other is a smaller, more compact hydraulic vane-driven head for lower torque operation. Both are three-speed designs.
Single tube derrick
T2W owners who experience its wide-open workspace and uncluttered deck offered by its tubular derrick prefer it over lattice-style derricks, especially during large-hole work and case welding. Though lighter in weight than traditional lattice derricks, the tubular tower provides superior strength and resistance to linear and torsional deﬂection and accommodates casing hammer, dual wall or drill and drive systems.
The single-cylinder cable feed system’s major components have been engineered to be larger and more mechanically efficient, reducing maintenance and part fatigue.
The cable feed is contained within the derrick, which protects its moving components from exposure to the typical drilling environment and rod handling operations.
An optional 15,000-pound winch with two-part line matches the pullback of the rig. This allows the operator to trip out of the hole with the winch or the head.
Optional hydraulic front drive assist turns the rig into all-wheel-drive vehicle.
An automatic transmission provides reduced fuel consumption, simplified operation and training, and better shifting performance in conditions such as freshly plowed or sloppy fields.
An optional 550 horsepower engine is available. A split-shaft PTO drive system selects drill or drive mode.