Results 1 to 10 of about 1,056,070 (342)
Machines, 2023 To optimize and improve the impact performance of a hydraulic rock drill, it is helpful to test the stress waves of the drill and analyze the impact energy, impact frequency, and energy utilization rate.
Zhenyi Yang, Jun Li, Guoyan Yu
doaj +2 more sources
Application of Seismic Sensors in Measurement While Drilling [PDF]
SensorsRock geotechnical properties can be reflected in drill signals while drill rod penetrates through rocks. The rate of penetration, rotary speed, torque, load, sound, vibration, etc., are different for various rock types, since they are influenced by rock ...
Manoj Khanal +5 more
doaj +2 more sources
Drilling Processes with Hydraulic Percussion Rock Drills
Journal of MMIJ, 2017 Rock drills were developed about two hundred years ago, and hydraulic percussion rock drills are about half-century old. Performance and efficiency of rock drills have been increased by a number of researchers and engineers.
Kimihiro HASHIBA +2 more
doaj +3 more sources
Numerical analysis on the drilling force of pneumatic impactors under different working conditions and structural parameters [PDF]
Scientific ReportsThis study presents a numerical analysis of impact forces in down-hole hammer (DTH) using finite element method (FEM) and impact drilling dynamics theory.
Dongfang Li +8 more
doaj +2 more sources
Bit selection method based on the rock drillability characteristics and principal component analysis of rock-breaking indicators [PDF]
HeliyonUltra-deep oil and gas structure is the key field of exploration and development in the southern margin of Junggar Basin. In this area, the formation lithology is complex, the rock strength is high, and the drilling engineering has problems such as low ...
Yang Hu +6 more
doaj +2 more sources
Adaptation of the Winkie Drill for subglacial bedrock sampling
Annals of Glaciology, 2021 The Winkie Drill is an agile, commercially available rock coring system. The U.S. Ice Drilling Program has modified a Winkie Drill for subglacial rock and ice/rock interface coring, as well as drilling and coring access holes through ice.
Grant V. Boeckmann +6 more
doaj +1 more source
Numerical Simulations and Experiments on Single-Tooth Rock-Breaking
Machines, 2022 The rock-breaking efficiency of a drilling tool directly affects the production costs and progress of foundation construction. It is essential to understand the mechanism of mechanical rock-breaking to improve rock-breaking efficiency.
Heyuqiu Li +5 more
doaj +1 more source
Geological mapping and stand-up time estimation based on core drill evaluation using RMR89 on Tunnel 3 Sigli Banda Aceh Toll Road [PDF]
E3S Web of Conferences, 2021 Tunnel 3 of the Sigli Banda Aceh Toll Road has been designed based on several site investigations. The site investigations have not included surface geological investigations.
Latif Hanif Khoirul +2 more
doaj +1 more source
Mining, 2021 Drill bit failure is a prominent concern in the drilling process of any mine, as it can lead to increased mining costs. Over the years, the detection of drill bit failure has been based on the operator’s skills and experience, which are subjective and ...
Lesego Senjoba +5 more
doaj +1 more source