Downhole high-pressure air hammers for open pit mining

Repin, A. A.; Smolyanitsky, B. N.; Alekseev, S. E.; Popelyukh, A. I.; Timonin, Vadim; Karpov, V. N.

doi:10.1134/s1062739114050123

Cited by 14 publications

(4 citation statements)

References 3 publications

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“…Down‐the‐hole (DTH) air hammer drilling is considered as one of the most efficient drilling methods for hard rock drilling . In the DTH air hammer drilling, straighter holes and low costs per metre are achieved by the frequently percussion action and high impact loads at the bit inserts .…”

Section: Introductionmentioning

confidence: 99%

Design and numerical analysis of a large‐diameter air reverse circulation drill bit for reverse circulation down‐the‐hole air hammer drilling

Zhang

Luo

Gan

et al. 2019

Energy Science & Engineering

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Reverse circulation down‐the‐hole (RC‐DTH) air hammer drilling is a fast and cost‐effective method for hard rock drilling. As the air RC drill bit is the heart for RC‐DTH air hammer drilling system to form the reverse circulation, a large‐diameter RC drill bit was innovatively designed and numerically optimized with respect to the suction ability. Results show that increasing the suction‐nozzle elevation angle and deflection angle can improve the drill bit suction ability. The drill bit performance reaches its optimal state when the air flow rate was about 1.205 kg/s, thereafter it exhibits a reverse variation trend with the increase in air mass flow rate. The optimum diameter of the suction nozzles is 20 mm for the drill bit studied in this work. The RC drill bit with outer diameter of 665 mm and RC‐DTH air hammer with outer diameter of 400 mm were manufactured and a field trial was conducted. Field test results show that the penetration rate using the RC‐DTH air hammer drilling method is more than twice the conventional rotary drilling method. This drilling approach poses a great potential for the large‐diameter hard rock drilling applied in the upper portions of a well bore above the potential producing reservoir formation for land oil and gas drilling, geothermal drilling and relevant field drilling operations.

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Section: Introductionmentioning

confidence: 99%

Design and numerical analysis of a large‐diameter air reverse circulation drill bit for reverse circulation down‐the‐hole air hammer drilling

Zhang

Luo

Gan

et al. 2019

Energy Science & Engineering

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“…The effectiveness of punch drilling of high-strength rocks was investigated in [13], and paper [14] proved that fracturing of rock array can affect the performance of the drilling process. It should be noted that the result of the executed research did not contain estimations of the influence of fracturing intensity on the performance of drilling.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Exploring the efficiency of applying fractal analysis for the process of decorative stone quality control

Sobolevskyi

Коробійчук

Іськов

et al. 2016

EEJET

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“…DOI: 10.17212/1994-6309-2017-2-67-78 Введение В настоящее время наиболее перспективные способы бурения основаны на использовании оборудования ударного действия. Высокая энергия ударных импульсов позволяет эффективно разрушать горную породу, однако одновре менно является причиной быстрого разрушения дета-лей ударных машин, ре сурс которых обычно не превышает нескольких десятков часов машинного времени [1]. Традиционно ответственные детали ударных механизмов изготав ливают из среднеуглеродистых сталей, которые упрочняют закалкой с последующим низким отпуском.…”

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Influence of nonmetallic inclusions on the fracture resistance of steel under fatigue dynamic compression conditions

Popelyukh¹,

Veselov²,

Munkueva³

et al. 2017

Metal Working and Material Science

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Downhole high-pressure air hammers for open pit mining

Cited by 14 publications

References 3 publications

Design and numerical analysis of a large‐diameter air reverse circulation drill bit for reverse circulation down‐the‐hole air hammer drilling

Design and numerical analysis of a large‐diameter air reverse circulation drill bit for reverse circulation down‐the‐hole air hammer drilling

Exploring the efficiency of applying fractal analysis for the process of decorative stone quality control

Influence of nonmetallic inclusions on the fracture resistance of steel under fatigue dynamic compression conditions

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