Epiroc is a leading global performance partner for the mining and facilities industries. With ground-breaking innovation, Epiroc develops and produces innovative, safe and sustainable drill rigs, rock excavation and building devices and tools. The business also offers first-rate service and options for automation and interoperability. Epiroc is based in Stockholm, Sweden, had revenues of BSEK 41 in 2019 and has more than 14 000 passionate staff members supporting and teaming up with customers in more than 150 countries.
Epiroc's Surface area division establishes, produces and markets a wide variety of rock drilling devices for usage in surface area mining, expedition, construction, quarries, as well as water well and oil and gas applications around the world. The department 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 a long time there has been a basic rule in the market 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.
A lot of drilling operations are performed with 4%-in. drill pipe, and, taking into account tackle, drill collars, and floating effect, 20 Ib per ft of the drilling string IS a close approximation of the weight which the raising devices is hired to deal with. A drilling rig ranked at 10,000 feet should hoist a 200,000-lb string of drill pipe, a rig rated at 13,500 feet, a 250,000-lb string, etc
With reference to drawworks style, it IS more effective that the rated loading of drill pipe can be raised In the 3rd or fourth speed (a speed ratio about halfway between low and high). A 12,500-ft drawworks and drive group, geared up with four 300-hp engines raises its ranked string of 41/2-in.
The average for the string will have to do with 80 sec per stand, and approximately 3 hours are needed to come out of the hole from 12,500 ft. Referring to Reference , the smaller rigs, if powered on a depth score basis of 100 hp per 1,000 feet, also average close to 80 sec each to hold up stands at rated depth.
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