Results 61 to 70 of about 345,800 (104)

Stick-slip whirl interaction in drillstring dynamics

, 2002
This paper attempts to explain the complicated behavior of oilwell drillstring motionwhen both torsional stick-slip and lateral whirl vibration are involved.
Campen, DH Dick van, Keultjes, WJG, Leine, R.I., Leine, RI Remco, Campen, van, D.H., Keultjes, W.J.G.   +5 more
core   +1 more source

Dynamic stability of a stepped drillstring conveying drilling fluid [PDF]

, 2017
Taking into account differences between a drill pipe (DP) and a drill collar (DC), the drillstring in a vertical well is modeled as a stepped pipe conveying a drilling fluid downwards to the bottom inside the string and then upwards to the ground from ...
Tang, S., Guang-Hui Zhao, Zhao, G.-H., Zheng Liang, Liang, Z., Li, J., Ju Li, Song Tang   +7 more
core   +1 more source

Study on Rotor-Bearing System Vibration of Downhole Turbine Generator under Drill-String Excitation

Energies
Downhole turbine generators (DHTG) installed within drill-string are susceptible to internal and external excitation during the drilling process, causing significant dynamic loads on bearings, and thereby reducing the bearing’s service life.
Benchun Yao, Zhen Tian, Xu Zhan, Changyun Li, Hualong Yu   +4 more
doaj   +1 more source

Machine Learning Solution for Predicting Vibrations while Drilling the Curve Section. [PDF]

ACS Omega, 2023
Saadeldin R, Gamal H, Elkatatny S.
europepmc   +1 more source

Real-Time Drilling Performance Optimization Using Automated Penetration Rate Algorithms with Vibration Control

Fuels
Automation has transformed process optimization across industries by enhancing efficiency, safety, and reliability while minimizing human intervention.
Dan Sui
doaj   +1 more source

Drillstring Failure - Identification, Modeling, and Experimental Characterization

, 2019
Drilling is one of the costliest and risky activities in oil and gas industry due to complexity of interactions with downhole formation. Under such conditions, the uncertainty of drillstring behavior increases, and hence, it becomes difficult to predict ...
Hassan, Edris M., Abdo, Jamil, Boulbrachene, Khaled, Kwak, Jan C. T.   +3 more
core   +1 more source

A review of torsional vibration mitigation techniques using active control and machine learning strategies

Petroleum
Drilling is one of the most challenging and expensive processes in hydrocarbon extraction and geothermal well development. Dysfunctions faced during drilling can increase the non-productive time (NPT) greatly, resulting in inflating the drilling cost and
Aditya Sharma, Khizar Abid, Saket Srivastava, Andres Felipe Baena Velasquez, Catalin Teodoriu   +4 more
doaj   +1 more source

Research on the Influence of Deep-Water Drilling Risers on Drillstring Motion Trajectory and Vibration Characteristics

Machines
The swing of the riser in deep-water drilling can significantly impact the drill string. In this study, we establish a riser model that considers the combined disturbance of periodic dynamic wind and wave loads. By coupling it with the drill string model,
Weiguo Hai, Yingming He, Qilong Xue
doaj   +1 more source

Nonlinear drillstring dynamics : modeling, vibration analysis, and control

Drilling engineering, standing at the core of geoenergy exploitation and geological information collection, faces different geological, hydraulic, and mechanical challenges that affect its efficiency and safety.
Zhang, Yifan, 1998-
core   +1 more source

Research on a Measurement Method for Downhole Drill String Eccentricity Based on a Multi-Sensor Layout. [PDF]

Sensors (Basel), 2021
Li H, Wang R.
europepmc   +1 more source