Gravel Pack Studies in a Full-Scale, High-Pressure Wellbore Model

1987 ◽  
Author(s):  
D.E. Schroeder
Keyword(s):  
High Pressure ◽  
Full Scale ◽  
Gravel Pack

Experimental study of the strength and durability of metal-composite high-pressure tanks

2019 ◽  
Vol 85 (1(I)) ◽  
pp. 49-56 ◽  
Author(s):  
A. M. Lepikhin ◽  
V. V. Moskvichev ◽  
A. E. Burov ◽  
E. V. Aniskovich ◽  
A. P. Cherniaev ◽  
...  
Keyword(s):  
High Pressure ◽  
Strain State ◽  
Full Scale ◽  
Fracture Mechanisms ◽  
Metal Composite ◽  
Test Results ◽  
Stress Strain ◽  
Pneumatic Pressure ◽  
Stress Strain State ◽  
Composite Tank

The results of unique experimental studies of the strength and service life of a metal-composite high-pressure tank are presented. The goal of the study is to analyze the fracture mechanisms and evaluate the strength characteristics of the structure. The methodology included tests of full-scale samples of the tank for durability under short-term static, long-term static and cyclic loading with internal pneumatic pressure. Generalized test results and data of visual measurements, instrumental and acoustic-emission control of deformation processes, accumulation of damages and destruction of full-scale tank samples are presented. Analysis of the strength and stiffness of the structure exposed to internal pneumatic pressure is presented. The types of limiting states of the tanks have been established experimentally. Change in the stress-strain state of the tank under cyclic and prolonged static loading is considered. Specific features of the mechanisms of destruction of a metal-composite tank are determined taking into account the role of strain of the metal liner. The calculated and experimental estimates of the energy potential of destruction and the size of the area affected upon destruction of the tank are presented. Analysis of test results showed that the tank has high strength and resource characteristics that meet the requirements of the design documentation. The results of the experiments are in good agreement with the results of numerical calculations and analysis of the stress-strain state and mechanisms of destruction of the metal-composite tank.

scholarly journals Wall Temperature Measurements in a Full-Scale Gas Turbine Combustor Test Rig With Fiber Coupled Phosphor Thermometry

2020 ◽  
Vol 143 (1) ◽  
Author(s):  
Patrick Nau ◽  
Simon Görs ◽  
Christoph Arndt ◽  
Benjamin Witzel ◽  
Torsten Endres
Keyword(s):  
High Pressure ◽  
Gas Turbine ◽  
Wall Temperature ◽  
Clean Energy ◽  
Full Scale ◽  
Temperature Measurements ◽  
Test Facility ◽  
Fiber Optic Probe ◽  
Gas Turbine Combustor ◽  
Phosphor Thermometry

Abstract Wall temperature measurements with fiber coupled online phosphor thermometry were, for the first time, successfully performed in a full-scale H-class Siemens gas turbine combustor. Online wall temperatures were obtained during high-pressure combustion tests up to 8 bar at the Siemens Clean Energy Center (CEC) test facility. Since optical access to the combustion chamber with fibers being able to provide high laser energies is extremely challenging, we developed a custom-built measurement system consisting of a water-cooled fiber optic probe and a mobile measurement container. A suitable combination of chemical binder and thermographic phosphor was identified for temperatures up to 1800 K on combustor walls coated with a thermal barrier coating (TBC). To our knowledge, these are the first measurements reported with fiber coupled online phosphor thermometry in a full-scale high-pressure gas turbine combustor. Details of the setup and the measurement procedures will be presented. The measured signals were influenced by strong background emissions probably from CO*2 chemiluminescence. Strategies for correcting background emissions and data evaluation procedures are discussed. The presented measurement technique enables the detailed study of combustor wall temperatures and using this information an optimization of the gas turbine cooling design.

scholarly journals Research of perimeter reinforcement of the ground base by cement-sand mortar injection

2015 ◽  
Vol 2 (4) ◽  
pp. 151-156
Author(s):  
Леонид Нуждин ◽  
Leonid Nuzhdin ◽  
Матвей Нуждин ◽  
Matvey Nuzhdin
Keyword(s):  
High Pressure ◽  
Laboratory Experiments ◽  
Full Scale ◽  
Pressure Injection ◽  
Shallow Soil ◽  
Foundation Base ◽  
Soil Foundation ◽  
High Pressure Injection

The article analyzes the results of a series of full-scale experiments for studying consolidation of foundations by perimeter reinforcement of the soil by rigid incompressible irregularly shaped inclusions. The experiments modeled consolidation of a shallow soil foundation base by directed high-pressure injection of mobile cement and sand mixtures. Generalization and analysis of the results of several dozens of laboratory experiments allowed to establish approaches to setting rational parameters of perimeter reinforcement of soil foundations by creation of rigid incompressible inclusions using injection of mobile cement-sand mixtures.

scholarly journals Similitude for the Dynamic Characteristics of Dual-Rotor System with Bolted Joints

Mathematics ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 3
Author(s):  
Lei Li ◽  
Zhong Luo ◽  
Fengxia He ◽  
Zhaoye Qin ◽  
Yuqi Li ◽  
...  
Keyword(s):  
High Pressure ◽  
Dynamic Characteristics ◽  
Low Pressure ◽  
Full Scale ◽  
Rotor System ◽  
Bolted Joints ◽  
Scaled Model ◽  
Scaling Relationships ◽  
Counter Rotation ◽  
Vibration Responses

The dual-rotor system has been widely used in aero-engines and has the characteristics of large axial size, the interaction between the high-pressure rotor and low-pressure rotor, and stiffness nonlinearity of bolted joints. However, the testing of a full-scale dual-rotor system is expensive and time-consuming. In this paper, the scaling relationships for the dual-rotor system with bolted joints are proposed for predicting the responses of full-scale structure, which are developed by generalized and fundamental equations of substructures (shaft, disk, and bolted joints). Different materials between prototype and model are considered in the derived scaling relationships. Moreover, the effects of bolted joints on the dual-rotor system are analyzed to demonstrate the necessity for considering bolted joints in the similitude procedure. Furthermore, the dynamic characteristics for different working conditions (low-pressure rotor excitation, high-pressure rotor excitation, two frequency excitations, and counter-rotation) are predicted by the scaled model made of a relatively cheap material. The results show that the critical speeds, vibration responses, and frequency components can be predicted with good accuracy, even though the scaled model is made of different materials.

A Surface-Micromachined Nitride-Diaphragm High-Pressure Sensor for Oil Well Application

2000 ◽  
Author(s):  
Yong Xu ◽  
Fukang Jiang ◽  
Yu-Chong Tai ◽  
Eric Donzier ◽  
William A. Loomis ◽  
...  
Keyword(s):  
High Pressure ◽  
Temperature Coefficient ◽  
Pressure Sensor ◽  
Full Scale ◽  
Oil Well ◽  
Excitation Voltage ◽  
First Report

Abstract A surface-micromachined, high-pressure sensor with polysilicon piezoresistors for oil well applications has been successfully developed. This work represents the first report of a nitride-diaphragm (3μm thick) oil-well pressure sensor with a diaphragm diameter of 44μm. The sensors have been calibrated up to 4000 psi. A sensitivity of 7.7 μV/V/psi is obtained. With 5 V excitation voltage, the full scale output (FSO, 4000 psi) is 154 mV. The nonlinearity is less than ± 0.2% of FSO. The hysteresis is less than 0.04% of FSO. A temperature coefficient of 25 μV/V/°C (equivalent to 0.08% of FSO/°C) is observed under 1000 psi pressure bias.

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