Integrity Analysis of Casing Premium Connection under High Compression Load

2021 ◽  
Vol 1035 ◽  
pp. 447-451
Author(s):  
Peng Wang ◽  
Jun Feng Xie ◽  
You Cheng Zheng ◽  
Fang Ting Hu ◽  
Nan Ji
Keyword(s):  
Performance Optimization ◽  
High Performance ◽  
Oil And Gas ◽  
Long Distance ◽  
Element Analysis ◽  
Compression Load ◽  
Structural Fatigue ◽  
Compression Performance ◽  
High Compression ◽  
Deep Wells

With the increasingly harsh conditions of complex oil and gas wells such as high-temperature and high-pressure deep wells and long-distance horizontal well, the integrity of casing string puts forward higher requirements for compression performance of premium thread connections. The requirements of high compression resistance of connection is complicated, including ensuring the integrity of structure and sealability for thread at the same time under high compression load being equal to the bearing capacity of casing body, and considering the structural fatigue, environmental fracture and seal failure caused by the weakening of thread bearing performance under cyclic load. Based on the failure cases of some casing connections, laboratory tests and finite element analysis results, this paper discusses the key technical points in the above mentioned problems, and provides the suggestions for the performance optimization of high-performance casing premium connections based on failure prevention.

Analysis and Comparison of Seal Ability of Premium Tubing Connections under Axial Alternating Load

2013 ◽  
Vol 423-426 ◽  
pp. 2035-2039
Author(s):  
Long Cang Huang ◽  
Yin Ping Cao ◽  
Yang Yu ◽  
Yi Hua Dou
Keyword(s):  
Contact Pressure ◽  
Oil And Gas ◽  
Element Analysis ◽  
Gas Well ◽  
Cycle Number ◽  
Compression Load ◽  
Well Production ◽  
Maximum Contact ◽  
Contact Pressures ◽  
Better Than

In the process of oil and gas well production, tubing connection stand the axial alternating load during open well, shut well and fluid flow. In order to know premium connection seal ability under the loading, two types of P110 88.9mmx6.45mm premium tubing connections which called A connection and B connection are performed with finite element analysis, in which contact pressures and their the regularities distribution on sealing surface are analyzed. The results show that with the increasing of cycle number, the maximum contact pressures on sealing surface of both A connection and B connection are decreased. The decreasing of the maximum contact pressures on B connection is greater than those on A connection. With the increasing of cycle number of axial alternating compression load, the maximum contact pressure on sealing surface of A connection is decreased, and the maximum contact pressure on sealing surface of B connection remains constant. Compared the result, it shows that the seal ability of A connection is better than B connection under axial alternating tension load, while the seal ability of B connection is better than type A connection under axial alternating compression load.

Development of a high-frequency torsional impact generator for improving drilling efficiency

2013 ◽  
Vol 228 (11) ◽  
pp. 1968-1977 ◽  
Author(s):  
Xiaohua Zhu ◽  
Liping Tang
Keyword(s):  
High Frequency ◽  
Oil And Gas ◽  
Impact Frequency ◽  
Element Analysis ◽  
Stick Slip ◽  
Deep Wells ◽  
Experimental Apparatus ◽  
The Finite Element Analysis ◽  
Drilling Technology ◽  
The Impact

The drilling of deep wells has to face problems to suppress stick-slip vibrations, especially for tough formations. Such problems induce frequent tool failures and poor well quality. Torsional impact drilling is an emerging drilling technology for improving the productivity of oil and gas by mitigating the stick-slip vibration. In this paper, a high-frequency torsional impact generator has been developed in order to investigate this drilling technology. Mechanism of torsional impact as a means of stick-slip mitigation is studied. Structure and operating principle of the tool have been presented. The finite element analysis approach is utilized in the analysis of applicability of the impact unit which is most significant for the tool. The analysis indicates that the impact unit operates successfully. An experimental apparatus is developed to examine the applicability of the proposed numerical method to the analysis of the impact unit. Laboratory tests with different impact frequency are conducted with the apparatus. It is verified that the impact system operates regularly, and high-frequency torsional impacts are generated. In addition, impact parameters of the apparatus which will be helpful to the study of the high-frequency torsional impact drilling are obtained.

How to Improve Rate of Penetration for Oil and Gas Wells

2012 ◽  
Vol 524-527 ◽  
pp. 1439-1449
Author(s):  
Fu Hua Wang ◽  
Rui He Wang ◽  
Xue Chao Tan
Keyword(s):  
High Performance ◽  
Oil And Gas ◽  
Field Tests ◽  
Field Performance ◽  
Great Promise ◽  
Technical Performance ◽  
Deep Well ◽  
Deep Wells ◽  
Improve Rate ◽  
Drilling Bit

Improved optimization of drilling bit selection and the compatibility between drilling bit and formation constraint the ROP and cost of deep well drilling to some extent. This combined with lab comprehensive lab drilling simulations and mechanisms of rock penetration can hold promise for improving drilling efficiency in deep wells. This paper reviews the mechanical characteristic parameters of rock engineering and demonstrates the obstacle of rock penetration in deep wells. Based on the general predictable formula of ROP, the relationship between drilling sensitive index and formation drillability is analyzed and the optimization and optimal match of drilling technology parameters are described. Technology Benefit Index (TBI) is proposed to evaluate the technical performance of drilling bit, advices and warnings from lab experiment and field experience on selecting and using bit are put forward. Statistical analysis of Well A based on TBI is made, the analysis of ROP improvement potential and overall program (including Bottom Hole Assembly, drilling parameters and type of drilling bit) of ROP improvement for Well B are worked out. Suggestions of drilling bit using based on mechanisms of rock penetration are proposed. Guided by the theory on improving ROP field tests of improving drilling rate are conducted to examine the field performance. By comparison, the tested sections yield high performance of ROP improvement. The designed program enhancing ROP for experiment section proves to be operable and shows great promise in further improvement and application.

scholarly journals Analysis of Development Status of High Performance Water-based Drilling Fluid

2021 ◽  
Vol 8 (10) ◽  
Keyword(s):  
High Performance ◽  
Oil And Gas ◽  
Drilling Fluid ◽  
Development Trend ◽  
Research Progress ◽  
Development Status ◽  
Deep Wells ◽  
Water Based ◽  
Unconventional Oil And Gas ◽  
The Impact

Deep wells, ultra deep wells and unconventional oil and gas exploitation have gradually become the focus of exploration and development. The oil-based drilling fluid is gradually replaced by water-based drilling fluid because of the impact of cost and environmental protection factors. In order to better replace oil-based drilling fluid, research on high-performance water-based drilling fluid has been carried out at home and abroad, and its comprehensive performance has gradually approached that of oil-based drilling fluid. The research progress and future development trend of high performance water-based drilling fluid abroad are introduced.

Numerical Study on the Effect of Defect Length upon Burst Capacity of Composite Repaired Pipe

2021 ◽  
Vol 879 ◽  
pp. 179-188
Author(s):  
Kah Qi Lim ◽  
Chao Bao ◽  
Mohd Syahrul Hisyam Mohd Sani ◽  
Lim Kar Sing
Keyword(s):  
Oil And Gas ◽  
Numerical Study ◽  
Burst Pressure ◽  
Pipeline System ◽  
Repair System ◽  
Operating Pressure ◽  
Long Distance ◽  
Element Analysis ◽  
Frp Composites ◽  
The Difference

Pipeline system is one of the essential infrastructures in oil and gas industries as it is used to transport oil and gas over long distance. However, pipelines will undergo damages and deteriorations after being used for some years, especially when corrosion occurs. Corrosive pipes will experience reduction in wall thickness resulted a lower remaining strength of the pipe, and consequently lead to failure once the remaining strength unable to withstand the desired operating pressure of the pipe. Therefore, additional strength from repairing job needs to be provided, for instance, by using fibre-reinforced polymer (FRP) composites. Unlike the corroded pipeline assessment codes, the pipeline repair codes that are used to design composite repair system of corroded pipe do not include the defect geometries such as defect length. In this study, burst pressure of the composite repaired pipeline with different defect lengths and the effect of the defect length upon the burst capacity of composite repaired pipe are investigated. The study is carried out by finite element analysis on various defective pipes with different defect length sizes. The results show that the difference of the burst pressure subjected to various defect lengths is 15.59% and this had proved that there is effect of defect length upon the burst capacity of composite repaired pipe. This finding can be very useful for optimizing the existing repair design.

Numerical Evaluation of Mechanical Property Change and Collapse Strength of ERW Pipes Considering Manufacturing Process

2018 ◽  
Author(s):  
Seong-Wook Han ◽  
Soo-Chang Kang ◽  
Jiwoon Yi ◽  
Ho-Kyung Kim
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Analytical Model ◽  
Manufacturing Process ◽  
High Performance ◽  
Oil And Gas ◽  
Large Change ◽  
Outer Diameter ◽  
Element Analysis ◽  
Collapse Strength

Along with the development of the energy industry, demand for oil and gas pipelines has increased, and as the low oil price era has been prolonged, more economical pipe design and construction are required. Typical examples are ERW pipes used as OCTG or reel-lay pipeline. The ERW pipe is made by passing the plate through continuous rollers, where repetitive loading and unloading causes unintentional plastic deformation and changes in initial steel properties. So, this study focused on both the change of mechanical properties during manufacturing process and collapse strength of ERW pipe considering the Bauschinger effect in order to produce more economical and high performance steel pipe. In this paper, the ERW manufacturing process was divided into three stages: forming station, sizing station, and flattening station. The ERW manufacturing process was simulated as 3D nonlinear finite element models using ABAQUS (6.14-1). Then, the change of mechanical properties at each process station was examined through finite element analysis and PEEQ, Alpha, and residual stress in each process station were evaluated for maintaining continuity of analysis. And flattening station where the reverse bending gives a large change in the mechanical properties was also performed. Finally, the collapse strength of the ERW pipe was evaluated in consideration of the change in compression strength during the manufacturing process. The ABAQUS analytical model was verified by showing analytical results to be identical with the outer diameter measured from the full-scale size pipes. Using the developed analytical model, it is possible to numerically predict the mechanical properties and collapse strength of ERW pipe.

Parallel Computing for Tire Simulations

2011 ◽  
Vol 39 (3) ◽  
pp. 193-209 ◽  
Author(s):  
H. Surendranath ◽  
M. Dunbar
Keyword(s):  
High Performance ◽  
Effective Means ◽  
Cost Effective ◽  
Turnaround Time ◽  
Careful Consideration ◽  
Rolling Contact ◽  
Element Analysis ◽  
Parallel Solvers ◽  
Design Changes ◽  
Highly Nonlinear

Abstract Over the last few decades, finite element analysis has become an integral part of the overall tire design process. Engineers need to perform a number of different simulations to evaluate new designs and study the effect of proposed design changes. However, tires pose formidable simulation challenges due to the presence of highly nonlinear rubber compounds, embedded reinforcements, complex tread geometries, rolling contact, and large deformations. Accurate simulation requires careful consideration of these factors, resulting in the extensive turnaround time, often times prolonging the design cycle. Therefore, it is extremely critical to explore means to reduce the turnaround time while producing reliable results. Compute clusters have recently become a cost effective means to perform high performance computing (HPC). Distributed memory parallel solvers designed to take advantage of compute clusters have become increasingly popular. In this paper, we examine the use of HPC for various tire simulations and demonstrate how it can significantly reduce simulation turnaround time. Abaqus/Standard is used for routine tire simulations like footprint and steady state rolling. Abaqus/Explicit is used for transient rolling and hydroplaning simulations. The run times and scaling data corresponding to models of various sizes and complexity are presented.

Accelerated testing of super lightweight UHPC waffle deck under heavy vehicle simulator

2021 ◽  
Vol 16 (2-3) ◽  
pp. 61-74
Author(s):  
Sahar Ghasemi ◽  
Amir Mirmiran ◽  
Yulin Xiao ◽  
Kevin Mackie
Keyword(s):  
High Performance ◽  
Failure Modes ◽  
High Performance Concrete ◽  
High Strength ◽  
Heavy Vehicle ◽  
Wheel Load ◽  
Element Analysis ◽  
Vehicle Simulator ◽  
Pavement Testing ◽  
Heavy Vehicle Simulator

A super lightweight deck can enhance load rating and functionality of a bridge, especially those identified as structurally deficient. This study was aimed to develop and experimentally validate a novel bridge deck as an ultra-lightweight low-profile waffle slab of ultra-high-performance concrete (UHPC) with either carbon fiber reinforced polymer (CFRP) or high strength steel (HSS) reinforcement. The proposed system lends itself to accelerated bridge construction, rapid deck replacement in bridges with load restrictions, and bridge widening applications without the need to replace girders. Performance and failure modes of the proposed deck were initially assessed through extensive lab experiments and finite element analysis, which together confirmed that the proposed deck panel meets the AASHTO LRFD requirements. The proposed deck system is not susceptible to punching shear of its thin slab and fails in a rather ductile manner. To evaluate its long-term performance, the system was further tested under the dynamic impact of wheel load at the Accelerated Pavement Testing (APT) facility of the Florida Department of Transportation using a Heavy Vehicle Simulator (HVS).

scholarly journals Electromagnetic-Thermal Integration Design of Permanent Magnet Motor for Vehicles

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Shijun Chen ◽  
Qi Zhang ◽  
Surong Huang
Keyword(s):  
Permanent Magnet ◽  
High Performance ◽  
Design Method ◽  
Electromagnetic Properties ◽  
Permanent Magnet Motor ◽  
Element Analysis ◽  
Experiment Platform ◽  
Motor Design ◽  
Dimensional Parameters ◽  
Thermal Integration

To more efficiently design high performance vehicular permanent magnet motor, an electromagnetic-thermal integration design method is presented, which considers both the electromagnetic properties and the temperature rise of motor winding when determining the main dimensional parameters of the motor. Then a 48-slot and 8-pole vehicular permanent magnet motor is designed with this method. The thermomagnetic coupling design is simulated and validated on the basis of multiphysical domain on finite element analysis. Then the prototype is analyzed and tested on a newly built motor experiment platform. It is shown that the simulation results and experimental results are consistent, which validate the accuracy and effectiveness of the new design method. Also this method is proved to well improve the efficiency of permanent magnet motor design.

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