Abstract: At 1:30 p.m. on May 29, 2017, an employee was changing a seal on a power swivel. The rigging chain on the tong broke, striking the employee in the side of his head. The employee suffered a fractured skull and was killed. Keywords: Broken Chain, Fracture, Struck By
[pdf] However, to extend the compressor's lifespan, you must change the oil more often (every 4,000 hours) and draw an oil sample every 1,000 hours. Oil plays a crucial role in the life of an oil-lubricated rotary screw air compressor: Removing impurities.
[pdf] To flip the spinning chain up from a tool joint box so that the chain wraps around the tool joint pin after it is stabbed into the box. The stand or joint of drill pipe is turned or spun by a pull on the spinning chain from the cathead on the drawworks.
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