Dynamic Analysis and Simulation of a New Steering Mechanism for Point-the-Bit Rotary Steerable System

2013 ◽  
Vol 712-715 ◽  
pp. 1401-1405
Author(s):  
Yuan Zhi Li ◽  
Wen Tie Niu ◽  
Hong Tao Li ◽  
Shuai Li
Keyword(s):  
Dynamic Analysis ◽  
Dynamic Simulation ◽  
Design Procedure ◽  
Planetary Gear ◽  
Horizontal Wells ◽  
Gear Train ◽  
Force Analysis ◽  
Drilling Tools ◽  
Steering Mechanism ◽  
Extended Reach Drilling

In oilfield exploitation, automatically directional steering can only be achieved with rotary steerable system (RSS). The designed well trajectories have become more complicated e.g. horizontal wells, extended reach drilling wells and 3D multi-target wells. To drill these complicated wells, new drilling tools are urgently needed. This paper proposed a new steering mechanism for point-the-bit RSS. The new steering mechanism uses a set of universal joints to avoid the high alternative strain on drilling mandrel, and it uses a specific eccentric planetary gear train to offset the drilling mandrel to achieve directional steering. Design procedure, Solid modeling, Force analysis and dynamic simulation have been discussed for further dynamic analysis towards the confirmation of the steering performance.

Research on Dynamic Simulation and Analysis of NGW Planetary Gear Train Based on ANSYS

2013 ◽  
Vol 834-836 ◽  
pp. 1480-1483
Author(s):  
Yu Bin Hou ◽  
Shou Bo Jiang
Keyword(s):  
Dynamic Analysis ◽  
Dynamic Simulation ◽  
Traditional Method ◽  
Planetary Gear ◽  
Gear Train ◽  
Planetary Gear Train ◽  
Simulation Results ◽  
Assembly Models

The dynamic simulation and analysis of NGW planetary gear train was researched in this paper. The working types of NGW planetary gear train were discussed and the applying of boundaries and loads were established. Then the assembly models were established in ANSYS and a dynamic simulation was performed. Finally 5 groups of NGW parameters were taken to carry out a dynamic analysis. The results obtained by FEM were compared with those calculated by traditional method. The simulation results show that the gaps between FEM and traditional method are stable. The research provides a reference for the strength checking and design of NGW planetary gear train.

Study on a Kind of Active Balancer Using Planetary Gear Train

2014 ◽  
Vol 701-702 ◽  
pp. 761-768
Author(s):  
Ying Zhang ◽  
Chong Peng ◽  
Yu Dong Wang
Keyword(s):  
Working Conditions ◽  
Structural Parameters ◽  
Dynamic Performance ◽  
Design Procedure ◽  
Planetary Gear ◽  
Gear Train ◽  
Original Structure ◽  
Dynamic Balancing ◽  
Planetary Gear Train ◽  
Structure And Motion

A kind of active balancer using planetary gear train was developed as a solution for dynamic balancing, aiming to balance the mechanisms actively and bring little changes to their original structure and motion. It consists of a two-DOF planetary gear train and a controllable motor. One of the two inputs doubles as the output, connected to the machine to be balanced. The other input is driven by the control motor. The conceptual design of the proposed balancer was discussed. Taking one scheme as example, design procedure of the balancer was introduced. Numerical examples were given to demonstrate the effectiveness of the proposed balancer. The results showed that much more flexibility on the dynamic performance under different working conditions were achieved by selecting suitable input speed trajectories and structural parameters of the planetary gear train of the active balancer.

Multi-body Dynamics Co-simulation of Planetary Gear Train for Dynamic Meshing Force Analysis

2020 ◽  
pp. 159-167
Author(s):  
Samuel Filgueira da Silva ◽  
Jony J. Eckert ◽  
Áquila Chagas de Carvalho ◽  
Fabio Mazzariol Santiciolli ◽  
Ludmila C. A. Silva ◽  
...  
Keyword(s):  
Planetary Gear ◽  
Gear Train ◽  
Force Analysis ◽  
Planetary Gear Train ◽  
Body Dynamics ◽  
Multi Body ◽  
Dynamic Meshing

scholarly journals Layout Guide for Design of a Novel Wheelchairs with Circumferential Linkage using Microsoft Word

2021 ◽  
Vol 2113 (1) ◽  
pp. 012031
Author(s):  
Zhilin Zhao
Keyword(s):  
Modular Design ◽  
Planetary Gear ◽  
The Elderly ◽  
Gear Train ◽  
Wheelchair Users ◽  
Microsoft Word ◽  
Steering Mechanism ◽  
Dimensional Parameters ◽  
Design Characteristics ◽  
Walking Mechanism

Abstract In recent decades, the aging of the world’s population has intensified, and the number of people with disabilities caused by various disasters and diseases has gradually increased. Most of the elderly, frail and disabled people will choose wheelchairs as their means of transportation. However, ordinary wheelchairs are unable to climb stairs, especially in cities, which seriously limits the range of activities of wheelchair users and affects their daily life. Hence, it is of great significance and value to design an intelligent building climbing wheelchair with appropriate price, stability and safety. This paper designs a multi-functional planetary height adjustable building climbing wheelchair with simple structure and low price. Firstly, a multi-functional building climbing wheelchair based on planetary gear train is designed by using modular design idea, including ground walking mechanism, in place steering mechanism, center of gravity adjustment mechanism and Seat leveling mechanism. The working principle and design characteristics of each mechanism are analyzed in detail. Then, through the analysis of the mathematical model of the climbing mechanism, the dimensional parameters of the three-star wheel set are determined. According to the power demand of wheelchair, the power system is selected and analyzed. It provided a new possibility for the wheelchair application and also for those in need.

A CAM-GEARED MECHANISM FOR RIGID BODY GUIDANCE

2017 ◽  
Vol 41 (1) ◽  
pp. 143-157 ◽  
Author(s):  
Ren-Chung Soong
Keyword(s):  
Rigid Body ◽  
Design Method ◽  
Design Procedure ◽  
Planetary Gear ◽  
Inverse Kinematic ◽  
Gear Train ◽  
Simple Design ◽  
Compact Structure ◽  
Cam Profile ◽  
Inverse Kinematic Analysis

A cam-geared mechanism, consisting of a disk cam with a radially translating roller follower, a disk cam with an oscillating roller follower and an elementary planetary gear train is proposed for rigid body guidance. A design method of cam profile based on inverse kinematic analysis was also proposed. An example is provided to show the feasibility and effectiveness of this proposed method. The advantages of the new design include its simple, compact structure and simple design procedure.

scholarly journals Rotary steerable systems: mathematical modeling and their case study

2021 ◽  
Vol 11 (6) ◽  
pp. 2743-2761
Author(s):  
Caetano P. S. Andrade ◽  
J. Luis Saavedra ◽  
Andrzej Tunkiel ◽  
Dan Sui
Keyword(s):  
Directional Drilling ◽  
Steering Control ◽  
Fundamental Physics ◽  
Drilling Tools ◽  
Drilling Operations ◽  
Beam Bending ◽  
Extended Reach Drilling ◽  
And Control ◽  
2D And 3D

AbstractDirectional drilling is a common and essential procedure of major extended reach drilling operations. With the development of directional drilling technologies, the percentage of recoverable oil production has increased. However, its challenges, like real-time bit steering, directional drilling tools selection and control, are main barriers leading to low drilling efficiency and high nonproductive time. The fact inspires this study. Our work aims to contribute to the better understanding of directional drilling, more specifically regarding rotary steerable system (RSS) technology. For instance, finding the solutions of the technological challenges involved in RSSs, such as bit steering control, bit position calculation and bit speed estimation, is the main considerations of our study. Classical definitions from fundamental physics including Newton’s third law, beam bending analysis, bit force analysis, rate of penetration (ROP) modeling are employed to estimate bit position and then conduct RSS control to steer the bit accordingly. The results are illustrated in case study with the consideration of the 2D and 3D wellbore scenarios.

scholarly journals Use of Dynamic Analysis to Investigate the Behaviour of Short Neutral Sections in the Overhead Line Electrification

2021 ◽  
Vol 6 (5) ◽  
pp. 62
Author(s):  
John Morris ◽  
Mark Robinson ◽  
Roberto Palacin
Keyword(s):  
Dynamic Analysis ◽  
Dynamic Simulation ◽  
Model Simulation ◽  
Analysis Tool ◽  
Overhead Line ◽  
Element Analysis ◽  
Novel Approach ◽  
Section Model ◽  
The Uk ◽  
Neutral Section

The ‘short’ neutral section is a feature of alternating current (AC) railway overhead line electrification that is often unreliable and a source of train delays. However hardly any dynamic analysis of its behaviour has been undertaken. This paper briefly describes the work undertaken investigating the possibility of modelling the behaviour using a novel approach. The potential for thus improving the performance of short neutral sections is evaluated, with particular reference to the UK situation. The analysis fundamentally used dynamic simulation of the pantograph and overhead contact line (OCL) interface, implemented using a proprietary finite element analysis tool. The neutral section model was constructed using physical characteristics and laboratory tests data, and was included in a validated pantograph/OCL simulation model. Simulation output of the neutral section behaviour has been validated satisfactorily against real line test data. Using this method the sensitivity of the neutral section performance in relation to particular parameters of its construction was examined. A limited number of parameter adjustments were studied, seeking potential improvements. One such improvement identified involved the additional inclusion of a lever arm at the trailing end of the neutral section. A novel application of pantograph/OCL dynamic simulation to modelling neutral section behaviour has been shown to be useful in assessing the modification of neutral section parameters.

Dynamic Characteristics of Double Helical Planetary Gear Train With Tooth Friction

2015 ◽  
Author(s):  
Fengxia Lu ◽  
Rupeng Zhu ◽  
Haofei Wang ◽  
Heyun Bao ◽  
Miaomiao Li
Keyword(s):  
Degrees Of Freedom ◽  
Sliding Friction ◽  
Planetary Gear ◽  
Gear Train ◽  
Variable Step Size ◽  
Step Size ◽  
Planetary Gear Train ◽  
Gear Mesh ◽  
Meshing Stiffness ◽  
Nonlinear Dynamics Model

A new nonlinear dynamics model of the double helical planetary gear train with 44 degrees of freedom is developed, and the coupling effects of the sliding friction, time-varying meshing stiffness, gear backlashes, axial stagger as well as gear mesh errors, are taken into consideration. The solution of the differential governing equation of motion is solved by variable step-size Runge-Kutta numerical integration method. The influence of tooth friction on the periodic vibration and nonlinear vibration are investigated. The results show that tooth friction makes the system motion become stable by the effects of the periodic attractor under the specific meshing frequency and leads to the frequency delay for the bifurcation behavior and jump phenomenon in the system.

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