Results 41 to 50 of about 1,256 (185)
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. +3 more
core +1 more source
Analysis of Nonlinear Vibration of Hard Coating Thin Plate by Finite Element Iteration Method
Shock and Vibration, Volume 2014, Issue 1, 2014., 2014 This paper studies nonlinear vibration mechanism of hard coating thin plate based on macroscopic vibration theory and proposes finite element iteration method (FEIM) to theoretically calculate its nature frequency and vibration response. First of all, strain dependent mechanical property of hard coating is briefly introduced and polynomial method is ...
Hui Li +3 more
wiley +1 more source
Impact Force Magnitude Analysis of an Impact Pendulum Suspended in a Vibrating Structure
Shock and Vibration, Volume 19, Issue 6, Page 1359-1372, 2012., 2012 The purpose of this work is the experimental investigation and the mathematical modeling of the impact force behavior in a vibro‐impact system, where an impact pendulum is mounted on a cart that moves with a prescribed displacement. The dynamics of the system will be evaluated considering different excitation frequencies and changing the impact gap ...
R.R. Aguiar, H.I. Weber
wiley +1 more source
Applying the contact element for simulation of interaction between drillstring and holewall
Vietnam Journal of Mechanics, 2003 The purpose of research is to create a contact element in order to simulate the dynamics contact phenomenon of drillstring and drillhole. The contact element is located at some selected node along the drillstring.
Le Phuoc Hao, Ta Quoc Dung
doaj +1 more source
The Motion Decoupled Delivery System: A New Deployment System for Downhole Tools is Tested at the New Jersey Margin [PDF]
Scientific Drilling, 2013 The Motion Decoupled Hydraulic Delivery System (MDHDS) is a new downhole tool delivery system that is deployed by wireline and uses drillstring pressure to advance a penetrometer (or other downhole tool) into the formation at the bottom of offshore ...
P. B. Flemings +10 more
doaj +1 more source
Journal of Marine Science and EngineeringIn order to gain an insight into the stress state of drillstring in riserless drilling conditions with Casing while Drilling (CwD) technology, a stochastic and nonlinear dynamic model of the drillstring under the excitation of the environmental load is ...
He Li +4 more
doaj +1 more source
Vibration analysis of simultaneous drilling and reaming BHA
Journal of Petroleum Exploration and Production Technology, 2020 The drillstring used in the oil and gas exploration is a complex structure due to the different forces acting on it. One of the primary sources of drillstring vibrations is the cutting forces caused by the drill bit contact with the rock formation.
Mohammed F. Al Dushaishi +1 more
doaj +1 more source
A New Approach for Predicting Drillstring Vibration Impact on Wellbore Stability
, 2017 Many studies attributed wellbore instability problems to physical and chemical interactions between rocks and drilling fluids; however the impact of drillstring vibration was neglected.
Mohamed Shafik Khaled
core +1 more source
Investigating Drillstring Vibration and Stability in Coring Drilling
Energies, 2022 Transverse vibration of drillpipe in coring drilling is undesirable. Here, the influence of the core on drillpipe vibration is considered for the first time.
Yuchen Sun +5 more
doaj +1 more source
Fatigue of Drillstring: State of the Art [PDF]
Oil & Gas Science and Technology, 2002 Failure due to fatigue is a very costly problem in oil and gas industry. Many investigators have previously addressed this problem, but its frequency of occurrence is still excessive. Torque and tension can be correctly predicted but computations of fatigue duration are still approximate.
Vaisberg, O. +4 more
openaire +2 more sources