Cutting Shaft Casings

When removal of temporary or heavily reinforced concrete filled drilled shaft casings is required below the surface of the water, HyDrill tools will increase productivity and improve quality without exposing personnel to adverse or dangerous working conditions. Our remotely deployed shaft cutting systems deliver faster completions than do manual cutting methods. Float-in delivery systems quickly deploy cutting tools to any specified elevation with accuracies to within 0.005 of an inch. Standard rigging allows depths of 50 feet to be obtained and multiple cuts can be made for controlling the lift able weight of a severed stem section. Track systems vary in diameter to accommodate various shaft sizes and hinge open for installation around the shaft.

HyDrill’s cold cutting abrasive-jet tools are
typically deployed in a tandem cutting configuration
resulting in an 180° rotation which reduces the cutting
time by 50%. Irregular shaped stems such as those found
on square, rectangular, or bull nosed foundational piers can be
removed in the same manner. HyDrill tools can efficiently separate virtually any thickness of steel. Deeper cuts through heavily reinforced concrete are accomplished by reducing the rotational speed of the cutting tools resulting in deeper stream penetrations.

To ensure trouble free tool descent external surfaces from the water line to the cut elevation should be free of all welded or bolted members. Debris in a 36 inch perimeter around the base of the shaft at the mud line should be cleared prior to cutting. Cuts specified below the mud line will require adequate excavation to the specified elevation. Inquiries should be directed to HyDrill applications.