Influence of Structure of Electrode Array on Logging. The Resistivity Logging Response through Casing of Structure of Electrode Array

Because difference of formation model affects the potential distribution on the metal casing, the resistivity logging response can be obtained through casing by measuring the potentials on the metal casing. In fact, the logging responses are the comprehension effects of complex formation with cement sheath and metal casing, so that in the coefficients of transmission line equation (TLE), we should consider the effects of formation with cement sheath model in radial-direction. In the following, for the formation with cement sheath taking on eight-layer in axial-direction, and step in radial-direction, the resistivity logging responses through casing are researched and discussed, and given the recurrence formula with cement sheath to compute potential. Draw the curve of the resistivity logging response through casing of eight-layer formations with cement sheath. The conductivity of formation is computed is very approximating to that of formation with cement sheath model. The computing examples also show that this method has a fast computing speed (the run time of computing example is less than 1s). For analysis the logging response of eight-layers and block formations with cement sheath, and the design of logging instruments, the research is important significance and useful.

The Logging Response of Step Conductivity Formations both in Axial and in Radial

10.4028/www.scientific.net/amr.1030-1032.1356 ◽

2014 ◽

Vol 1030-1032 ◽

pp. 1356-1359

Author(s):

An Ling Wang ◽

Fu Ping Liu

Keyword(s):

Potential Distribution ◽

Radial Direction ◽

Recurrence Formula ◽

Axial Direction ◽

Formation Model ◽

Line Equation ◽

Metal Casing ◽

Resistivity Logging ◽

Important Significance ◽

Because difference of formation model affects the potential distribution on the metal casing, the resistivity logging response can be obtained through casing by measuring the potentials on the metal casing. In fact, the logging responses are the comprehension effects of complex formation and metal casing, so that in the coefficients of transmission line equation (TLE), we should consider the effects of formation model in radial-direction. In the following, for the formation taking on six-layer in axial-direction, and step in radial-direction, the resistivity logging responses through casing are researched and discussed, and given the recurrence formula to compute potential. Draw the curve of the resistivity logging response through casing of six-layer formations. The conductivity of formation is computed is very approximating to that of formation model. The computing examples also show that this method has a fast computing speed (the run time of computing example is less than 1s). For analysis the logging response of six-layers and block formations, and the design of logging instruments, the research is important significance and useful.

The Resistivity Logging Response through Casing of Six-Layer Formations

10.4028/www.scientific.net/amr.1030-1032.1278 ◽

2014 ◽

Vol 1030-1032 ◽

pp. 1278-1281

Author(s):

An Ling Wang ◽

Fu Ping Liu

Keyword(s):

Potential Distribution ◽

Radial Direction ◽

Recurrence Formula ◽

Axial Direction ◽

Formation Model ◽

Line Equation ◽

Metal Casing ◽

Resistivity Logging ◽

Important Significance ◽

Because difference of formation model affects the potential distribution on the metal casing, the resistivity logging response can be obtained through casing by measuring the potentials on the metal casing. In fact, the logging responses are the comprehension effects of complex formation and metal casing, so that in the coefficients of transmission line equation, we should consider the effects of formation model in radial-direction. In the following, for the formation taking on six-layer in axial-direction, and step in radial-direction, the resistivity logging responses through casing are researched and discussed, and given the recurrence formula to compute potential. Draw the curve of the resistivity logging response through casing of six-layer formations. The conductivity of formation is computed is very approximating to that of formation model. The computing examples also show that this method has a fast computing speed (the run time of computing example is less than 1s). For analysis the logging response of six-layers and block formations, and the design of logging instruments, the research is important significance and useful.

The Resistivity Logging Response through Casing of Nine-Layer Formations with Crude Oil

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.602-605.773 ◽

2014 ◽

Vol 602-605 ◽

pp. 773-775

Author(s):

An Ling Wang ◽

Fu Ping Liu

Keyword(s):

Crude Oil ◽

Radial Direction ◽

Recurrence Formula ◽

Axial Direction ◽

Formation Model ◽

Line Equation ◽

Metal Casing ◽

Resistivity Logging ◽

Important Significance ◽

Because difference of formation model affects the potential distribution on the metal casing, the resistivity logging response can be obtained through casing by measuring the potentials on the metal casing. In fact, the logging responses are the comprehension effects of complex formation with Crude oil and metal casing, so that in the coefficients of transmission line equation (TLE), we should consider the effects of formation with Crude oil model in radial-direction. In the following, for the formation with Crude oil taking on nine --layer in axial-direction, and step in radial-direction, the resistivity logging responses through casing are researched and discussed, and given the recurrence formula with Crude oil to compute potential. Draw the curve of the resistivity logging response through casing of nine-layer formations with Crude oil. The conductivity of formation is computed is very approximating to that of formation with Crude oil model. The computing examples also show that this method has a fast computing speed (the run time of computing example is less than 1s). For analysis the logging response of nine-layers and block formations with Crude oil, and the design of logging instruments, the research is important significance and useful.

The Logging Response of Step Conductivity Formations with Crude Oil Emulsion Both in Axial and in Radial

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.602-605.776 ◽

2014 ◽

Vol 602-605 ◽

pp. 776-778

Author(s):

An Ling Wang ◽

Fu Ping Liu

Keyword(s):

Crude Oil ◽

Radial Direction ◽

Recurrence Formula ◽

Axial Direction ◽

Formation Model ◽

Oil Emulsion ◽

Line Equation ◽

Metal Casing ◽

Resistivity Logging ◽

Important Significance

Because difference of formation model affects the potential distribution on the metal casing, the resistivity logging response can be obtained through casing by measuring the potentials on the metal casing. In fact, the logging responses are the comprehension effects of complex formation with Crude oil emulsion and metal casing, so that in the coefficients of transmission line equation (TLE), we should consider the effects of formation model in radial-direction. In the following, for the formation with Crude oil emulsion taking on five-layer in axial-direction, and step in radial-direction, the resistivity logging responses through casing are researched and discussed, and given the recurrence formula with Crude oil emulsion to compute potential. Draw the curve of the resistivity logging response through casing of five-layer formations. The conductivity of formation with Crude oil emulsion is computed is very approximating to that of formation model. The computing examples also show that this method has a fast computing speed (the run time of computing example is less than 1s). For analysis the logging response of five-layers and block formations, and the design of logging instruments, the research is important significance and useful.

Analysis of Vibration Caused by Electromagnetic Force on Stator End-Winding of Large Dry Submersible Motor

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.416-417.428 ◽

2013 ◽

Vol 416-417 ◽

pp. 428-432

Author(s):

Li Shan ◽

Xiao Wei Cheng ◽

Yong Fang ◽

Xiao Hua Bao

Keyword(s):

Electromagnetic Field ◽

Steady State ◽

Transition State ◽

Electromagnetic Force ◽

Radial Displacement ◽

Radial Direction ◽

Axial Direction ◽

Axial Displacement ◽

Force Density ◽

Submersible Motor

This paper investigates the vibration which caused by electromagnetic on the stator end-winding of the large dry submersible motor. Firstly, the electromagnetic field which included transition state and steady state is researched by 3-D FEM. Secondly, the electromagnetic force which lead to vibrations of end-winding is calculated by numerical method, it can be obtained that where endured the largest force density along the slant part of end-winding. Finally, the radial displacement and the axial displacement of the slant part which caused by vibrations is studied, the analysis results show that the axial displacement is larger than the amplitude of radial displacement. It indicates that the slant part of end-winding will be more easily damaged at axial direction than radial direction.

Mechanical Model of Non-Magnetic Particles Centrifugal Separation in Magnetic Fluid

10.4028/www.scientific.net/amr.820.225 ◽

2013 ◽

Vol 820 ◽

pp. 225-228

Author(s):

Tong Li ◽

Jing Tao Wei ◽

Ji Li

Keyword(s):

Centrifugal Force ◽

Magnetic Fluid ◽

Mechanical Model ◽

Radial Direction ◽

Magnetic Particles ◽

Axial Direction ◽

Separation Mechanism ◽

Centrifugal Separation

It is difficult to sort fine non-magnetic particles only by the buoyancy of magnetic fluid. Therefore, based on the magneto hydrostatic separation, the centrifugal separation under the condition of centrifugal force would be an effective method to improve the efficiency. By establishing the mechanical model of centrifugal separation in magnetic fluid, this paper analyzes the kinematical equations of non-magnetic particles in three directionstangential direction, radial direction, and axial direction, and then theoretically explores the separation mechanism of this method.

USE OF SOLID STATE NUCLEAR TRACK DETECTORS CR-39 TO STUDY CHARGED PARTICLES EMISSION FROM A 3 kJ PLASMA FOCUS

Modern Physics Letters B ◽

10.1142/s0217984995001005 ◽

1995 ◽

Vol 09 (16) ◽

pp. 1033-1037

Author(s):

M. ZAKAULLAH ◽

IMTIAZ AHMAD ◽

KHAIRUR REHMAN ◽

G. MURTAZA

Keyword(s):

Charged Particle ◽

Solid State ◽

Plasma Focus ◽

Radial Direction ◽

Particle Flux ◽

Charged Particles ◽

Axial Direction ◽

Low Energy ◽

Nuclear Track Detectors

The CR-39 solid state nuclear track detectors are employed to investigate the fluence anisotropy of charged particles (protons, deuterons and tritons) emitted from the focus region of a low energy Mather-type plasma focus energized by a single 32 μF, 15 kV (3.6 kJ) capacitor. The charged particle flux is the highest in the axial direction, and decreases towards the radial direction. The radial charged particles flux is six times smaller than the flux in the axial direction.

Pitting Corrosion Diagnosis of Bearing Based on Power Cepstrum and Histogram

10.4028/www.scientific.net/amr.512-515.1672 ◽

2012 ◽

Vol 512-515 ◽

pp. 1672-1676 ◽

Cited By ~ 1

Author(s):

Shu Fang ◽

De Liang Li ◽

Li Tao Liu ◽

Zhen Wei Zhang

Keyword(s):

Pitting Corrosion ◽

Vibration Amplitude ◽

Radial Direction ◽

Impact Force ◽

Axial Direction ◽

High Impact ◽

New Method ◽

Outer Ring ◽

Heavy Load ◽

Bearing Race

The axle assembly of fire robot need endure both heavy load and high impact force, and the pitting corrosion in the bearing race become a commom fault. In this paper, the vibration of bearing both in the inner ring and outer ring was analyzed, the characteristics of bearing with pitting corrosion were also analyzed, and based on those characteristics a new method for pitting corrosion diagnosis were proposed, in this method the power cepstrum in the axial direction and histogram of the vibration amplitude in the radial direction were used for detecting the pitting corrosion of bearing, and experiments results proved the practicability and effectiveness of this method.

Transient Modelling of Rotating and Stationary Cylindrical Heat Pipes: An Engineering Model

Energies ◽

10.3390/en11123458 ◽

2018 ◽

Vol 11 (12) ◽

pp. 3458 ◽

Cited By ~ 2

Author(s):

Metin Celik ◽

Geert Paulussen ◽

Dennis van Erp ◽

Wiebren de Jong ◽

Bendiks Boe

Keyword(s):

Heat Pipe ◽

Radial Direction ◽

Computational Cost ◽

Heat Pipes ◽

Transient Behavior ◽

Axial Direction ◽

Engineering Model ◽

Average Deviation ◽

Lumped Parameter ◽

Lumped Parameter Models

Rotating wickless and stationary capillary cylindrical heat pipes are widely used heat transfer devices. Transient behavior of such heat pipes has been investigated numerically with computational fluid dynamics and lumped parameter models. In this paper, the advantages of both methods are combined into a novel engineering model that is low in computational cost but still accurate and rich in the details it provides. The model describes the interior dynamics of the heat pipe with a 2D representation of a cylindrical heat pipe. Liquid and vapor volumes are coarsely meshed in the axial direction. The cells are allowed to change in size in the radial direction during simulation. This allows for tracking the liquid/vapor interface without having to implement fine meshing. The model includes the equations for mass, momentum and energy and is applicable to both rotating and stationary heat pipes. The predictions of the model are validated with other experimental, numerical, and analytical works having an average deviation of less than 4%. The effects of various parameters on the system are explored. The presented model is suitable for the simulation of heat pipe systems in which both the level of detail and the computational cost are crucial factors.