Results 31 to 40 of about 133,825 (302)

Experimental studies of the resultant contact forces in drillbit-rock interaction [PDF]

, 2014
Peer ...
Ajibose, Olusegun Kolawole, Akisanya, Alfred Rotimi, Wiercigroch, Marian   +2 more
core   +1 more source

Design of signal generator for mine-used mud pulse wireless measurement while drilling

Gong-kuang zidonghua, 2019
For working conditions of small pump capacity and low pressure of directional drilling in coal mine underground, a mine-used mud pulse wireless measurement while drilling (MWD) device was developed, and technique requirements, structure composition and ...
LI Quanxin, CHU Zhiwei
doaj   +1 more source

Design and application of ϕ114.3 mm wireline measurement while drilling pipe for rotary steering

Meikuang Anquan, 2023
In order to satisfy the requirements of rotary steering-oriented drill pipe with real-time data transmission, through the combination of structural design, numerical simulation, laboratory test and field comprehensive test, the ϕ114.3 mm cable drill pipe
Mengmeng DONG
doaj   +1 more source

Abrasive water jet drilling of advanced sustainable bio-fibre-reinforced polymer/hybrid composites : a comprehensive analysis of machining-induced damage responses [PDF]

, 2018
This paper aims at investigating the effects of variable traverse speeds on machining-induced damage of fibre-reinforced composites, using the abrasive water jet (AWJ) drilling.
A Alberdi, A Alberdi, A Hascalik, A Hascalik, A Hejjaji, AA Shaikh, B KC, DF Liu, DJ McGill, DJ Thomas, DJ Thomas, E Oho, FA Almansour, FL Chen, G Fowler, H Heidarya, H Ho-Cheng, H Hocheng, HN Dhakal, HN Dhakal, Hom Nath Dhakal, I Shyha, J Flynn, J Montesano, James R. Smith, JC Crocker, JK Patel, K Phapale, M Ramulu, Marco Paggi, MM Thwe, MMW Irina, N Ramesha, NE Hajj, PD Unde, R Selvam, S Kalirasu, S Nunna, Saheed Olalekan Ojo, Sikiru Oluwarotimi Ismail, SO Ismail, SO Ismail, SO Ismail, SP Jani, YW Seo   +44 more
core   +3 more sources

The Holy Grail: A road map for unlocking the climate record stored within Mars' polar layered deposits [PDF]

, 2020
In its polar layered deposits (PLD), Mars possesses a record of its recent climate, analogous to terrestrial ice sheets containing climate records on Earth.
Banfield, Don, Becerra, Patricio, Buhler, Peter, Byrne, Shane, Calvin, Wendy, Carter, Lynn, Edgar, Lauren, Ehlmann, Bethany, Emmett, Jeremy, Hanley, Jennifer, Hansen, Candice, Hayne, Paul O., Hecht, Michael, Henderson, Bryana L., Herkenhoff, Ken, Holt, John W., Horgan, Briony, Hvidberg, Christine, Kahre, Melinda, Kleinböhl, Armin, Koutnik, Michelle, Lalich, Daniel, Landis, Margaret, Milkovich, Sarah, Navarro, Thomas, Obbard, Rachel, Paige, David A., Parra, Sergio, Perry, Matthew R., Piqueux, Sylvain, Putzig, Nathaniel, Siegler, Matthew, Skidmore, Mark, Smith, Isaac B., Staehle, Robert L., Stern, Jennifer, Thomas, Nicolas, Zacny, Kris   +37 more
core   +1 more source

NanTroSEIZE Stage 1 expeditions: introduction and synthesis of key results [PDF]

, 2009
Integrated Ocean Drilling Program Expeditions 314, 315, and 316 were carried out as a unified program of drilling collectively known as Stage 1 of the Nankai Trough Seismogenic Zone Experiment, a multistage complex drilling project.
, , , , , , , , , D. Curewitz, E. Screaton, G. Kimura, H. Masago, H. Tobin, J. Ashi, K.T. Moe, M. Kinoshita, S. Lallemant   +17 more
core   +1 more source

Design of data processing software of measurement device while drilling for rotary drilling

Gong-kuang zidonghua, 2015
Requirements analysis was conducted according to function of data processing software of measurement device while drilling for rotary drilling, and software development needs of various functions were elaborated in details. Software modules were designed
HUANG Linsen, ZHANG Xiantao
doaj   +1 more source

Study of the plasma flow interaction with the borehole surface in the process of its thermal reaming [PDF]

, 2018
Purpose. Study of the plasma flow interaction with the borehole surface in the process of its thermal reaming for determination of transient temperature distribution along the borehole surface and the average coefficient of heat transfer from the plasma ...
Horiachkin, V, Potapchuk, I, Semenenko, Ye, Voloshyn, O, Yemelianenko, V, Zhevzhyk, O, Zhovtonoha, M, Таtarko, L   +7 more
core   +1 more source

Advancing drilling parameter reliability: A data-driven comparison of MWD and DPM for stratigraphic identification

Journal of Rock Mechanics and Geotechnical Engineering
Stratigraphic interface characterization and strength parameter assessment of geomaterials constitute fundamental research priorities in geological and geotechnical engineering. While measurement while drilling (MWD) and drilling process monitoring (DPM)
Ping-Feng Li, Xue-Fan Wang, Zhou Yang, Zhong-Jian Zhang, Fei Yang, Hong-Pei Tang, Bing-Bing Zhang   +6 more
doaj   +1 more source

Research on a Measurement Method for Downhole Drill String Eccentricity Based on a Multi-Sensor Layout

Sensors, 2021
The drill string used in drilling is in a complex motion state downhole for several kilometers. The operating attitude and eccentricity of the downhole drill string play important roles in avoiding downhole risks and correcting the output of the imaging ...
Hongqiang Li, Ruihe Wang
doaj   +1 more source