Results 81 to 90 of about 1,256 (185)

Improved Autodriller Performance with Direct Drillstring Measurements in the Drawworks Control Loop

, 2017
Precise autodriller control is critical for minimizing drilling dysfunction, maximizing tool life, and optimizing drilling performance. Measurements made as part of the control loop have traditionally been located remotely from the drillstring, and ...
J.. Shim, R.. Ramirez, J. R. Anderson, I. M. Soukup, M. S. Boudreaux   +4 more
core   +1 more source

Prediction and optimization of drill string torque and drag in horizontal wells based on dynamic friction coefficient testing

Unconventional Resources
With the large-scale development of unconventional oil and gas resources, extended-reach horizontal wells have been increasingly utilized in shale reservoirs.
Chi Peng, Haoxuan Li, Yayun Zhang, Kehao Bo, Guofa Qiao   +4 more
doaj   +1 more source

Dynamic Modeling of Directional Drillstring: A Linearized Model Considering Well Profile

, 2017
Drillstring vibration can cause fatigue failure of the drill pipe, premature wear of the bit, and a decreased drilling efficiency; therefore, it is important to accurately model the drillstring and bottomhole assembly (BHA) dynamics for vibration ...
Dongmei Chen, Tianheng Feng, Inho Kim
core   +1 more source

Downhole pipe selection and arrangement for acoustic drillstring telemetry

, 2011
Drillstring acoustic telemetry is an effective transmission method to retrieve downhole data. In this paper, finite-difference algorithm is used for acoustic wave propagation prediction along the drillstring. An impulse excitation signal of time duration
Han, W. K., Je, Minkyu, Guan, Yong Liang, Arasu, Muthukumaraswamy Annamalai, Kumar, L. S., Lee, Y. H., Sun, Sheng   +6 more
core   +1 more source

Fatigue Crack Control in Structural Details using surface peening [PDF]

, 2008
This paper presents an analytical and experimental study of crack shape evolution in steel plate specimens under cyclic loading. It is widely known that the introduction of compressive residual stresses by cold working the surface can be highly ...
Shi Song, Ngiam, Brennan, Feargal P.
core   +1 more source

Drillstring Vibration Identification Based on Data Augmentation and Automated Machine Learning

Shiyou jixie
Accurate identification of downhole drillstring vibration is significant for improving drilling efficiency and reducing complex risks. However， traditional vibration identification mechanisms and methods are based on several hypotheses， making them ...
Pan Tao, Song Xianzhi, Liu Muchen, Xiao Shijie, Qin Yonghe, Zhu Zhaopeng, Zhang Chengkai   +6 more
doaj  

A review of vertical drill-string mathematical modelling

Applications in Engineering Science
This work aims to elucidate the fundamental concepts and approaches for modelling the vertical rotary drilling system and analysing drill string vibrations through a comprehensive literature review.
Jasem M. Kamel, Asan G.A. Muthalif, Abdulazim H. Falah   +2 more
doaj   +1 more source

A divided and prioritized experience replay approach for streaming regression. [PDF]

MethodsX, 2021
Leite Arnø M, Godhavn JM, Aamo OM.
europepmc   +1 more source

A New Model for Predicting Rate of Penetration Using an Artificial Neural Network. [PDF]

Sensors (Basel), 2020
Elkatatny S, Al-AbdulJabbar A, Abdelgawad K.   +2 more
europepmc   +1 more source

Repeated Impact Method and Devices to Simulate the Impact Fatigue Property of Drillstring

, 2017
It is well known that drillstring failures are a pendent problem in drilling engineering, because of the fatigue accumulation caused by the low amplitude-repeated impact.
Y Pan, B Li, J Pan, W Y Liu, Q Li, Y H Lin   +5 more
core   +1 more source