A5102860613- Drilling and Well Engineering
- Oil and Gas Production Techniques
- Hydraulic Fracturing and Reservoir Analysis
- Erosion and Abrasive Machining
- Engineering Structural Analysis Methods
- Particle Dynamics in Fluid Flows
- Reservoir Engineering and Simulation Methods
- Engineering Diagnostics and Reliability
- Gear and Bearing Dynamics Analysis
- Nanopore and Nanochannel Transport Studies
- Tunneling and Rock Mechanics
- High-Velocity Impact and Material Behavior
- Mechanical stress and fatigue analysis
- Acoustic Wave Phenomena Research
- Concrete and Cement Materials Research
- Geotechnical Engineering and Underground Structures
- Hydrogen embrittlement and corrosion behaviors in metals
- Tribology and Lubrication Engineering
- Coal Combustion and Slurry Processing
- Noise Effects and Management
- Offshore Engineering and Technologies
- Enhanced Oil Recovery Techniques
- Structural Integrity and Reliability Analysis
- Belt Conveyor Systems Engineering
- Mechanical Engineering and Vibrations Research
Xi'an Shiyou University
2016-2025
Daqing Oilfield of CNPC
2007
Daqing Oilfield General Hospital
2007
CSA/GFRC is an advanced composite material possessed with great ductility and durability. However, its bending performance fibre condition, as well intrinsic microstructural changes, under elevated temperature have not been understood so far. XRD was applied in this study to investigate the hydration mechanism of CSA cement 50°C, 70°C, 80°C. Bending carried out test toughness CSA/GFRC. SEM observe underlying changes different curing regimes. It found that there a gradual degradation both...
Switching wells in high-temperature and high-pressure gas will affect parameters such as the temperature pressure of fluid wellbore. Dynamic monitoring is difficult, wellbore temperature, pressure, physical are coupled to each other. Obtaining them separately lead large calculation errors. In order improve prediction accuracy wells, Based on temperature–pressure coupling algorithm, this study compares advantages disadvantages nine classic algorithms based considers impact high fluid,...
Traditional static analysis cannot effectively explain the issue of sealing performance premium connection being decreased due to vibration tubing, leading failure sealing. In this paper, based on energy dissipation theory and considering influence micro contact slip surface under a finite element model is established. The natural frequency mode are obtained through modal experiments, accuracy verified. results show that first five frequencies mainly concentrated in axial direction with...
A study was conducted on the mechanical behavi or of completion string in a 10,000 m ultra-deep well from western China’s oilfields to identify causes plastic failure string. This article analyzes interaction between fluid and tubing high-pressure high-production gas wells by establishing structure coupling four-equation model. Through fatigue tests, it found that P110 material has stress amplitude related ratchet effect, revealing softening characteristics material. case analysis, entire...
Injecting high-pressure fluid into a reservoir rock mass will change the mechanical properties of rock; strength and safety shale well wall are also extremely critical. In order to investigate law variation in water-sensitive during fracturing, an experimental study on under high confining pressure water–rock coupling was carried out. Taking as research object, effects water content properties, residual strength, macroscopic microscopic failure modes were analyzed. The test results show that...
A numerical study on the erosion of particle clusters in an abrupt pipe was conducted by means combined computational fluid dynamics (CFD) and discrete element methods (DEM). Furthermore, a particle-wall extrusion model criterion for judging collision interference were developed to classify calculate rate caused different interparticle mechanisms cluster. Meanwhile, full-scale flow experiment confirm effect cluster verify calculated results. The reducing wall made super 13Cr stainless steel...
In this paper, a novel metal-matrix phononic crystal with low-frequency, broad and complete, locally-resonant band gap, which includes the in-plane out-of-plane gaps, is investigated numerically. The proposed structure consists of double-sided single “hard” cylinder stubs, are deposited on two-dimensional phononic-crystal plate that an array rubber fillers embedded in steel plate. Our results indicate both gap increase after introducing stubs. More specifically, increased by analogous-rigid...
Due to the perforated holes on casings after perforating, strength of will be decreased and well integrity influenced during sequential services. To get remaining casings, experimental theoretical study were completed. The samples obtained from conventional oil field in simulation according oilfield perforating practice, stress concentration coefficients around measured confirmed by experiments finite element analysis. Taking as semi-elliptical surface cracks formula for calculating...
Abstract With the development of gas well exploitation, calculation wellbore with single-phase state affected by single factor cannot meet actual needs engineering. We need to consider simulation complex environment under coupling multiphase and multiple factors, so as better serve petroleum industry. In view problem that commonly used temperature pressure model can only be for conditions, error is large. Combined heat transfer mechanism method pipe flow drop gradient, this study analyzes...
In high production gas wells, premium connections are subject to alternating loads and vibration excitation due the change of fluid pressure exerted on tubing string. The energy dissipation sealing surface affects performance connections. present study proposes a new analysis method for using microslip shear layer mode, novel technique overcome improve limitations existing this paper, based model, equilibrium equation connection was established with constraints taper surface, thread, torque...
To study the erosion–corrosion characteristics of TP140 casing steel and 13Cr tubing in oil fields, we performed gas–solid liquid–solid jet flow experiments to control particle addition, angle, velocity measure erosion corrosion components. Meanwhile, used a standard three-electrode system changes electrochemical parameters on metal surface two-phase containing 2 wt % NaCl. Results showed that is mainly dominated by velocities impact angles particles, rate affected liquid rate. The rates two...
We selected a 1.4 wt% Octadecyl trimethyl ammonium chloride (OTAC) concentration wormlike micellar fluid with broad relaxation time spectrum and another single Maxwell of 4.0 OTAC constant weight ratio to NaSal 5:1. The shear viscosity, dynamic modulus as well the extensional viscosity were tested. steady unsteady motion spheres investigated by high-speed video images in these two fluids. Extremely slow settling velocity is found when smaller diameters 3.2 mm settles solution. Stronger...
To maintain the well integrity, strength and sealing ability of premium connection should be in safe scope. ISO 13679 is widely used for evaluating tubing casing all over world. Because disadvantage experiment such as long period, high cost inquire on facility, considering convenience universality finite element method, contacting nonlinearity material nonlinearity, three dimensional model a certain type established with consideration helix angle. The loads exerted series B test thermal...
Purpose To maintain the well integrity, strength and sealing ability of premium connection should be in safe scope. ISO 13679 is widely used for evaluating tubing casing all over world. FE adopted to simulate tests. Design/methodology/approach Because disadvantage experiment such as long period, high cost requirement on facility, considering convenience universality finite element method, contacting nonlinearity material nonlinearity, three-dimensional model a certain type established with...