Results 271 to 280 of about 1,123,828 (350)

Experimental and numerical investigations on rock-breaking mechanism of rotary percussion drilling with a single PDC cutter

Journal of Petroleum Science and Engineering, 2021
To achieve high-efficiency drilling in hard formations, the rotary percussive drilling tool was designed to improve rock-breaking efficiency. Currently, few studies are conducted to analyze the relationship between the percussion parameters and rock ...
Yan Xi, Wen Wang, L. Fan, Chunqing Zha, Jun Li, Gong-hui Liu   +5 more
semanticscholar   +1 more source

Tool wear monitoring in rock drilling applications using vibration signals

Wear, 2018
Tool wear highly influences the safety, productivity, and overall performance of rock drilling operations. Since rock is a brittle, non-homogeneous, and anisotropic material whose physico-mechanical properties usually vary substantially in the cutting ...
M. Klaic, Zrinka Murat, T. Staroveški, D. Brezak   +3 more
semanticscholar   +1 more source

Rock Strength Prediction in Real-Time While Drilling Employing Random Forest and Functional Network Techniques

, 2021
The rock unconfined compressive strength (UCS) is one of the key parameters for geomechanical and reservoir modeling in the petroleum industry. Obtaining the UCS by conventional methods such as experimental work or empirical correlation from logging ...
H. Gamal, A. Alsaihati, S. Elkatatny, S. Haidary, A. Abdulraheem   +4 more
semanticscholar   +1 more source

Analysis of signal characteristics from rock drilling based on vibration and acoustic sensor approaches

Applied Acoustics, 2018
Lithological recognition is of great significance in oil drilling fields. To investigate the relationship between rock properties and the vibro-acoustic signal characteristics generated by drilling, a rock drilling vibration measurement system has been ...
Min Qin, Kai Wang, K. Pan, T. Sun, Zhiguo Liu   +4 more
semanticscholar   +1 more source

In-situ digital profiling of soil to rock strength from drilling process monitoring of 200 m deep drillhole in loess ground

, 2021
Digital drilling process monitoring (DPM) technique is an in-situ technique that continuously records the digital data of drilling process parameters in real time.
X. F. Wang, M. Zhang, Z. Yue
semanticscholar   +1 more source

Numerical simulation of the energy transfer efficiency and rock damage in axial-torsional coupled percussive drilling

, 2021
Axial-torsional coupled percussive drilling helps improve the breaking efficiency of hard rock. This paper adopted the simulation method to study the energy transfer efficiency (ETE), and rock damage in axial-torsional coupled percussive drilling with a ...
Hengyu Song, Huaizhong Shi, Gensheng Li, Chen Zhenliang, Xiaojing Li   +4 more
semanticscholar   +1 more source

3D finite elements modelling of percussive rock drilling: Estimation of rate of penetration based on multiple impact simulations with a commercial drill bit

Computers and geotechnics, 2018
This paper deals with assessing the rate of penetration (ROP) in percussive drilling of rock based on finite element simulations. For this end, a method to simulate the dynamic indentation in percussive drilling is developed and validated.
T. Saksala, M. Fourmeau, P. Kane, M. Hokka   +3 more
semanticscholar   +1 more source

Fluidic DTH hammer with backward-impact-damping design for hard rock drilling

Journal of Petroleum Science and Engineering, 2018
Hard rock drilling is increasingly important due to progress in both the use of geothermal heat as a new energy source and the development of new unconventional gas fields. The DTH hammer drilling method is generally considered one of the best approaches
Jianming Peng, Jianming Peng, Ge Dong, Ge Dong, Zhang Xinxin, Zhang Xinxin, Maosen Wang, Maosen Wang, Wu Dongyu   +8 more
semanticscholar   +1 more source

Influence of cemented carbide binder type on wear initiation in rock drilling – Investigated in sliding wear against magnetite rock

, 2019
Cemented carbides, containing hard WC grains in a ductile Co binder, are commonly used as the rock crushing part of rock drills.
J. Heinrichs, S. Norgren, S. Jacobson, K. Yvell, M. Olsson   +4 more
semanticscholar   +1 more source

Development and Application of a Multifunction True Triaxial Rock Drilling Test System

Journal of Testing and Evaluation, 2018
The real-time acquisition of the rock mass mechanical parameters and the rapid classification of the surrounding rock during the construction of an underground structure are of great value for informational construction and optimization of the parameters
Qi Wang, Hong-ke Gao, B. Jiang, Shucai Li, Gao Song, M. He, Chong Zhang   +6 more
semanticscholar   +1 more source