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Epiroc is a leading worldwide efficiency partner for the mining and facilities markets. With ground-breaking innovation, Epiroc develops and produces ingenious, safe and sustainable drill rigs, rock excavation and building and construction devices and tools. The business likewise supplies first-rate service and options for automation and interoperability. Epiroc is based in Stockholm, Sweden, had profits of BSEK 41 in 2019 and has more than 14 000 passionate workers supporting and teaming up with consumers in more than 150 countries.

Epiroc's Surface area department establishes, manufactures and markets a large range of rock drilling equipment for usage in surface area mining, expedition, building and construction, quarries, as well as water well and oil and gas applications around the world. The division has production in Sweden, the United States, China, India and Japan. Find out more at www.

ABSTRACTThis paper comment briefly on the useful aspects of power needed for rotary drilling and the diesel and gas engines utilized for the function. For some time there has been a general rule in the industry that a rotary-drilling rig, for effective operation, need to be powered to the level of 100 hp per 1,000 ft of depth ranking.

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A lot of drilling operations are performed with 4%-in. drill pipeline, and, taking into account deal with, drill collars, and floating impact, 20 Ib per feet of the drilling string IS a close approximation of the weight which the raising devices is hired to handle. A drilling rig ranked at 10,000 ft should raise a 200,000-lb string of drill pipe, a rig rated at 13,500 ft, a 250,000-lb string, etc

With recommendation to drawworks design, it IS preferable that the ranked loading of drill pipeline can be hoisted In the 3rd or 4th speed (a speed ratio about halfway between low and high). A 12,500-ft drawworks and drive group, equipped with 4 300-hp engines hoists its ranked string of 41/2-in.

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The average for the string will have to do with 80 sec per stand, and roughly 3 hours are required to come out of the hole from 12,500 ft. Referring to  Found Here , the smaller rigs, if powered on a depth rating basis of 100 hp per 1,000 feet, likewise average near 80 sec each to set back stands at ranked depth.