The Finite Element Analysis of the Rollers in a Rotary Steerable Drilling Tool

2013 ◽  
Vol 390 ◽  
pp. 641-645
Author(s):  
Guang Wei Zhang ◽  
Li You ◽  
Zhao Li
Keyword(s):  
Low Cost ◽  
Major Change ◽  
Drill String ◽  
Design Parameters ◽  
Directional Drilling ◽  
Element Analysis ◽  
Rotary Drilling ◽  
Drilling Tool ◽  
Thrust Bearings ◽  
Drilling Technology

Rotary steerable system (RSS) is a system complete the oriented features in real-time while a drill string rotary drilling. It is a major change since the 1990s in directional drilling technology. RSSs drilling frictional and torsional resistance is small, has a high drilling speed, low cost, the well trajectory is smooth and easy to control, it is considered to be the development direction of modern steering drilling technology .When the system working ,drilling pressure and torque are passed by the thrust bearings in the controlled bend sub oriented tool; therefore it is necessary to analysis the rollers load distribution to verify the design parameters of variation cardan shaft, thrust bearings and roller are correct or not, This article analyzed thrust bearings rollers by ANSYS. Determine its maximum stress, etc. Providing more intuitive and scientific basis for its structural optimization [1].

Thermomechanical Design for Fine Pitch 3D-IC Packages

2012 ◽  
Vol 2012 (1) ◽  
pp. 001001-001009 ◽  
Author(s):  
Akihiro Horibe ◽  
Sayuri Kohara ◽  
Kuniaki Sueoka ◽  
Keiji Matsumoto ◽  
Yasumitsu Orii ◽  
...  
Keyword(s):  
Coefficient Of Thermal Expansion ◽  
Low Cost ◽  
High Stress ◽  
High Viscosity ◽  
Thermomechanical Properties ◽  
Design Parameters ◽  
Element Analysis ◽  
Package Design ◽  
Fine Pitch ◽  
Silicon Vias

Low stress package design is one of the greatest challenges for the realization of reliable 3D integrated devices, since they are composed of elements susceptible to failures under high stress such as thin dies, metal through silicon vias (TSVs), and fine pitch interconnections. In variety of package components, an organic interposer is a key to obtain low cost modules with high density I/Os. However, the large mismatch in coefficient of thermal expansion (CTE) between silicon dies and organic laminates causes high stress in an organic package. The major parametric components in 3D devices are dies with /without Cu-TSVs, laminates, bumps, and underfill layers. Especially, the die thicknesses and underfill properties are ones of the parameters that give us some range to control as package design parameters. In general, the underfill material with a high modulus and a low CTE is effective in reducing the stress in solder interconnections between the Si die and the laminate. However, the filler content of underfill materials with such mechanical properties generally results in high viscosity. The use of high viscous materials in between silicon dies in 3D modules can degrade process ability in 3D integration. In this study, we show that the interchip underfills in 3D modules have a wider mechanical property window than in 2D modules even with fine pitch interconnections consisting mostly of intermetallic compounds (IMCs). Also the finite element analysis results show that the optimization of the structural or thermomechanical properties of organic laminates and interchip underfill contributes to reduction of stressing thinned silicon dies which may have some risks to the device performance.

scholarly journals Research on the measurement system of drilling while engineering parameters for intelligent drilling in coal mine

2020 ◽  
Vol 165 ◽  
pp. 03036
Author(s):  
Lian Jie
Keyword(s):  
Real Time ◽  
Drilling Process ◽  
Construction Process ◽  
Directional Drilling ◽  
Drilling Tool ◽  
Intelligent Decision Making ◽  
Intelligent Decision ◽  
Drilling Technology ◽  
Engineering Parameters ◽  
Parameter Measuring

In order to ensure safe and efficient mining and improve the efficiency of drilling construction, intelligent drilling technology has been studied in China. This technology is another development on the basis of automation. In addition to the automatic execution of the construction process, it also has the characteristics of intelligent perception, intelligent decision-making and intelligent correction. This technology requires engineering parameter measuring equipment to obtain the engineering parameters such as torque, WOB, inner and outer annulus pressure, rotation speed, vibration, temperature, etc. near the drill bit at the bottom of the hole in real time, so as to realize the real-time monitoring of the drilling process parameters at the bottom of the hole and the stress state of the drilling tool in the process of directional drilling, and increase the effective extraction distance of the drilling hole.

Fatigue Life Prediction of Cold Rolled Rotary Shouldered Threaded Connections

2018 ◽  
Author(s):  
Fei Song ◽  
Michael Du ◽  
Ke Li
Keyword(s):  
Fatigue Life ◽  
Cold Rolling ◽  
Fatigue Resistance ◽  
Element Model ◽  
Drill String ◽  
Directional Drilling ◽  
Drilling Tool ◽  
Threaded Connection ◽  
Threaded Connections ◽  
Cold Rolled

The bottom hole assembly (BHA) of a modern drill string for directional drilling mainly comprises a drill bit, a rotary steerable system, and a measurement while drilling tool. The tools and subs used on a BHA are screwed together through rotary shouldered threaded connections. Each connection is made up with a pin and a box. These connections are the weakest links when the BHA undergoes a large number of revolutions in a curved well section. When the fatigue life of a connection is consumed during a drilling job, a twist-off would occur, which could result in an enormous amount of non-productive time and possibly loss of the bottom BHA section in the hole. Cold rolling has proven to be able to improve fatigue resistance of a threaded connection by pressing a rolling wheel against the thread root and generating a layer of compressive residual stress at the root. Understanding how cold rolling improves fatigue resistance of a threaded connection is important for optimization of the rolling parameters and prediction of the BHA service life in a given drilling condition. In this paper, a predictive method is presented for fatigue life of a cold rolled threaded connection. A finite element model was developed to simulate the cold rolling process. The resulting deformation and stress states at the root were carried over through makeup of the pin and the box as well as through cyclic bending of the connection. The fatigue life predictions were found to be in favorable agreement with the experimental measurements from full-scale fatigue tests at different bending moment levels applied.

Field Tests on the Application of Oscillation Tool with a Fluidic Amplifier to Directional Well Drilling

2015 ◽  
Vol 741 ◽  
pp. 599-602
Author(s):  
Jiang Fu He ◽  
He Liu ◽  
Kun Yin ◽  
Xin Gan
Keyword(s):  
Flow Rate ◽  
Pressure Pulse ◽  
Field Tests ◽  
Test Results ◽  
Directional Drilling ◽  
Drilling Tool ◽  
Well Drilling ◽  
Operation Process ◽  
Drilling Tools ◽  
Drilling Technology

The directional well drilling technology is extensively utilized and developed throughout the world. However, series of drilling problems occurred in the operation process of directional drilling. In order to reduce the friction of drilling tools, an oscillation tool with a fluidic amplifier has been field tested, and the pressure pulse of oscillation tool has been obtained. Field test results have shown that the oscillation tool has an extensive flexibility to directional well drilling, and the oscillation tool could stably actuate the drilling tool to have reciprocating vibration, which contributes to the friction and drag reduction of drilling tools. Furthermore, it can be concluded that the pressure pulse value generated by pumped fluid varies with input flow rate, and the pressure of oscillation tool increases while the flow rate is increasing. In addition, the motion frequency of the oscillation tool is exponentially increasing with the raise of pumped flow rate.

scholarly journals REQUIREMENTS TOWARDS THE TECHNOLOGY OF CONSTRUCTION OF PIPELINES CROSSINGS BY DIRECTIONAL DRILLING METHOD

2015 ◽  
pp. 57-67
Author(s):  
Yu. I. Spektor ◽  
Z. Z. Sharafutdiniov ◽  
S. L. Golofast
Keyword(s):  
Directional Drilling ◽  
Drilling Tool ◽  
Drilling Method ◽  
Drilling Technology ◽  
Drilling Muds

A problem of construction of pipeline crossings through different obstacles using directional drilling technology is considered. Based on the results of the study of pipeline crossings construction the basic requirements towards the drilling technology, the used drilling tool, drilling muds and the wastes disposal are analyzed.

Finite Element Analysis on a 250 kN.m-Type Rotary Drilling Rig for Foundation of Geological Construction

2012 ◽  
Vol 516 ◽  
pp. 545-550
Author(s):  
Dae Sun Hong ◽  
Do Un Kim ◽  
Hyo Jeong Kang ◽  
Sang Wook Hwang ◽  
Sang Sik Lee
Keyword(s):  
Finite Element ◽  
Public Works ◽  
Deep Drilling ◽  
Element Analysis ◽  
Rotary Drilling ◽  
Drilling Tool ◽  
Drilling Rig ◽  
Operational Safety ◽  
Drilling Rigs ◽  
Rotary Drive

Rotary drilling rigs, general construction equipment, are widely used for deep drilling of ground for the foundations of public works. A new 250kN.m-type rotary drilling rig, most widely used in this field, is under development, and this study focuses on the operational safety of the mast subassembly on the basis of structure analysis of the mast subassembly using a finite element method with ANSYS. When using a drilling rig, an electric rotary drive supplies power for drilling. Here, the elevation of the rotary drive along the mast needs to be changed according to the geological construction environment. Through the analysis, the allowable torques at various elevations of the rotary drive are evaluated, also the safety of the drilling tool called the kelly bar subassembly is examined. Finally, the suitability of the mast subassembly design is examined from the analysis results.

Dynamic Stability of Gimbaled Spiral-Grooved Thrust Bearing

1973 ◽  
Vol 95 (2) ◽  
pp. 222-235
Author(s):  
A. Gu ◽  
C. H. T. Pan ◽  
R. H. Badgley
Keyword(s):  
Low Cost ◽  
Experimental Information ◽  
Design Parameters ◽  
Turbine Engines ◽  
Frequency Domain Method ◽  
Gas Turbine Engines ◽  
Stable States ◽  
Thrust Bearings ◽  
Wide Range ◽  
Stability Maps

A general, easily implemented technique is developed by which stability maps may be determined for gimbaled, gas-lubricated, spiral-grooved thrust bearings. This technique is based upon the spectral analysis (frequency domain) method in which the neutrally stable states of the stator-gimbal system are determined through solution of the system’s characteristic equations. The method has proven effective for conducting low-cost investigations of the sensitivity of system instability thresholds to changes in various system design parameters. Containing data valid for a wide range of gimbal inertias, stability maps are presented for a range of bearing compressibility numbers, for several bearing geometries, and for several values of mechanical damping in order to illustrate both the power of the technique and also its effectiveness. Limited experimental information which is presently available verified the essential features of the corresponding stability maps. The technique has been reduced to a form usable in the design of gas bearings for use in gas turbine engines.

Sectionalized Mechanical Models of Drilling Tool of Trenchless Directional Drilling

2012 ◽  
Vol 268-270 ◽  
pp. 1190-1193
Author(s):  
Hui Xia ◽  
Yi Hua Dou ◽  
Xin He Wang ◽  
Jiang Wen Xu
Keyword(s):  
Axial Compression ◽  
Working Conditions ◽  
Mechanical Analysis ◽  
Drill String ◽  
Drill Bit ◽  
Straight Section ◽  
Directional Drilling ◽  
Drilling Tool ◽  
Horizontal Section ◽  
Axial Tension

There are three working conditions namely drilling a guide hole, expanding the guide hole and pulling back pipeline in trenchless directional drilling. The position of drill string in the wellbore and loads exerted on the drill string varied in different working conditions. The models of buckling analysis of drill strings under compression, mechanical analysis of drill string under axial compression near drill bit in inclined straight section, mechanical analysis of drill string with multi-centralizers under axial compression near drill bit in inclined straight section, mechanical analysis of drill string near drill bit under axial compression in horizontal section, mechanical analysis of drill string near drill bit under axial tension in horizontal section, mechanical analysis of drill strings near drill bit under axial tension in inclined straight section and mechanical analysis of drill string in failed well are established based on the characteristic of loads and trajectories in each section. The establishment of sectionalized mechanical model of drilling tool is the fundament of further study of force analysis, deformation analysis and stress analysis.

scholarly journals Development of torque clutch drilling tool and evaluation of drag reduction performance

2018 ◽  
Vol 10 (10) ◽  
pp. 168781401880665 ◽  
Author(s):  
Xingming Wang ◽  
Ping Chen ◽  
Wanzhi Huang ◽  
Jiayan Zou
Keyword(s):  
Drag Reduction ◽  
Theoretical Calculation ◽  
Oil And Gas ◽  
Integrated Design ◽  
Drill String ◽  
Directional Drilling ◽  
Working Pressure ◽  
Drilling Tool ◽  
Horizontal Section ◽  
Horizontal Drilling

Horizontal well is one of the important methods of unconventional oil and gas resource development. As increasing length of horizontal section, there is a serious problem that axial force cannot transfer to bit. The drilling field needs a low-friction and low-cost drag reduction tool. This article summarized existing technologies of drag reduction in the horizontal and inclined well and proposes an integrated design of torque clutch. Detailed design of tool sub-systems is introduced. The tool includes three sub-systems: clutch, hydraulic system, and monitoring system. The clutch is consisted of multiple clutch units mounted in a parallel arrangement. Power of hydraulic control system adopts difference in pressure between inside and outside of drill pipes. It can efficiently reduce power consumption. The design function and minimum working pressure are validated and obtained by indoor test. According to theoretical calculation, reasonable distance from tool to bit can be obtained for an actual drilled well. During directional drilling mode, the tool can reduce more than 30% axial drag of drill string according to theoretical calculation. The tool can effectively improve the capacity of transfer weight to bit and overcome the excessive drag in horizontal drilling. No similar tools are reported in the current field.

IoT based e-Healthcare System to Enable Remote Patient Care based on Cloud Server

2017 ◽  
Vol 7 (7) ◽  
pp. 36
Author(s):  
P.Venu Gopala Rao ◽  
Eslavath Raja ◽  
Ramakrishna Gandi ◽  
G. Ravi Kumar
Keyword(s):  
Low Cost ◽  
Vital Signs ◽  
Smart Phone ◽  
Medical Professional ◽  
Design Parameters ◽  
Cloud Server ◽  
Significant Area ◽  
Efficient Data ◽  
System Data ◽  
Remote Patient

IoT (Internet of Things) has become most significant area of research to design an efficient data enabled services with the help of sensors. In this paper, a low-cost system design for e-healthcare service to process the sensitive health data is presented. Vital signs of the human body are measured from the patient location and shared with a registered medical professional for consultation. Temperature and heart rate are the major signals obtained from a patient for the initial build of the system. Data is sent to a cloud server where processing and analysis is provided for the medical professional to analyze. Secure transmission and dissemination of data through the cloud server is provided with an authentication system and the patient could be able to track his data through a smart phone on connecting to the cloud server. A prototype of the system along with its design parameters has been discussed.

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