Results 21 to 30 of about 36,919 (267)

APPLICATION OF MATHEMATICAL DRILLING MODEL ON SOUTHERN IRAQI OIL FIELDS

Journal of Engineering, 2008
Minimum-cost well drilling demands the best use of controllable drilling variables for each formation to be drilled. To reach this aim, this study was divided into two main parts: The first part deals with applying a mathematical drilling model to field
Sameera M. Hamad-Allah, Ali A. Ismael
doaj   +1 more source

Directional deflection equations for steerable drilling tools and the control mechanism of wellbore trajectory

Petroleum Exploration and Development, 2017
: To meet the wellbore trajectory control requirements for all kinds of steering drilling modes, the directional deflection equations for steerable drilling tools and the process control method for wellbore trajectory were proposed and an application ...
Xiushan LIU
doaj   +1 more source

Quantitative Analysis of Force and Torque in Bone Drilling

The Journal of Engineering Research, 2017
Bone drilling is an important and the most frequent operation in orthopaedics and other bone surgical procedures. Prediction and control of drilling force and torque are critical to safe and efficient surgeries.
K. Alam, R. Muhammad, A. Shamsuzzoha, A. AlYahmadi, N. Ahmed   +4 more
doaj   +1 more source

Investigation: Cutting Transport Mechanism in Inclined Well Section under Pulsed Drilling Fluid Action

Energies, 2021
Due to gravity, drilling cuttings are easily accumulated in an inclined well section, ultimately forming a cuttings bed, which places the drill pipe under strong friction torque.
Xiaohua Zhu, Keyu Shen, Bo Li
doaj   +1 more source

Drilling rate changes when air drilling is switched to mist drilling. [Claystone] [PDF]

, 1977
Eight shallow (30-foot-deep) holes were drilled in four formations to determine if the reduction in penetration rate that usually occurs when air drilling is changed to mist drilling might be due to the physical action of drilling a wet, soapy rock. The results showed an average loss of 9.3%, with the greatest loss occurring in limestone.
openaire   +2 more sources

Coal burst risk monitoring method based on the drilling powder of destressing drilling in coal seam and its application

Meitan xuebao
The drilling powder monitoring method is one commonly used method for coal burst risk evaluation in coal mines. The construction method of large-diameter destressing drilling is similar to that of the drilling powder monitoring method.
Tongbin ZHAO, Yanchun YIN, Wentao REN, Qingzhi ZHANG, Jiuguo GAO, Zhigang ZHAO   +5 more
doaj   +1 more source

Optimization of Drilling Parameters for Aluminum Metal Matrix Composite Using Entropy-Weighted TOPSIS under MQL Conditions

Engineering Transactions, 2023
The aim of the present work is to understand the effect of drilling parameters (drill speed and feed rate) during the drilling of a Saffil fiber-reinforced Al metal matrix composite (MMC) under minimum quantity lubrication (MQL) condition.
Sachin G. GHALME, Paweł KAROLCZAK
doaj   +1 more source

An approach for optimization of controllable drilling parameters for motorized bottom hole assembly in a specific formation

Results in Engineering, 2023
This study focuses on optimizing drilling parameters when using Positive Displacement Motors (PDMs). In drilling operations involving mud motors, weight-on-bit (WOB) alterations lead to variations in the system's parasitic pressure drop.
Hossein Yavari, Mohammad Fazaelizadeh, Bernt Sigve Aadnoy, Rasool Khosravanian, Jafar Qajar, Mostafa Sedaghatzadeh, Masoud Riazi   +6 more
doaj   +1 more source

Comparing the Effect of Semi‐Immersive Virtual Reality, Computerized Cognitive Training, and Traditional Rehabilitation on Cognitive Function in Multiple Sclerosis: A Randomized Clinical Trial

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Background Cognitive impairment is a common non‐motor symptom in Multiple Sclerosis (MS), negatively affecting autonomy and Quality of Life (QoL). Innovative rehabilitation strategies, such as semi‐immersive virtual reality (VR) and computerized cognitive training (CCT), may offer advantages over traditional cognitive rehabilitation (TCR ...
Maria Grazia Maggio, Desiree Latella, Lilla Bonanno, Paulo Cezar Rocha dos Santos, Marcos Maldonado‐Díaz, Meir Plotnik, Rosaria De Luca, Angelo Quartarone, Rocco Salvatore Calabrò   +8 more
wiley   +1 more source

Design and experimental study of a tethered self-excavating drilling and coring scheme for lunar deep mining

Meitan kexue jishu
The development and utilization of lunar mineral resources is an important way to solve the earth’s energy crisis. Drilling and coring, an effective method for lunar section sample collection, is a key prerequisite for accurately identifying the ...
Mingzhong GAO, Jiahua LI, Haichun HAO, Jing XIE, Yuanru LI, Lang ZHOU, Zheng GAO, Yan WU, Bing JI, Zhipeng WANG, Xuemin ZHOU   +10 more
doaj   +1 more source