The rotary drilling hose (API7K) is the flexible connector between the top of the standpipe and the swivel that allows for vertical travel. Its lengths are in the range of 45 ft (13.7 m) and over. We generally use rotar.
[pdf] Many accidents on the drill floorwhile pipe tripping involve using tongs. Injuries result from being caught between tongs and being struck by swinging tongs. All tongs should be securely attached and anchored.
[pdf] With interchangeable core bits capable of drilling holes from 1.5" to 9" in diameter, operators can tackle diverse pipe materials including vitrified clay, concrete, ductile iron, cast iron, C-900, HOBAS, and PVC/HDPE systems using a single versatile machine.
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