scholarly journals Experimental Analysis & Optimization with Validation of Ball Valve Body of WCB Material

2021 ◽  
Vol 9 (VIII) ◽  
pp. 480-491
Author(s):  
Agre Virbhadra Dhanraj
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Safety Issue ◽  
Strain Analysis ◽  
Ball Valve ◽  
The Body ◽  
Field Analysis ◽  
Valve Body ◽  
Large Size ◽  
Minimum Stress

The ball valves are used in place of pipelines where the flow of fluid is needed. Ball valves have been mostly used for high temperature and high pressure valves which requires high quality products with confidentiality, reliability and durability. The ball has a bore or passage through the middle, so that when the port is in line with both ends of the valve, the flow of fluid will occur. When the valve is closed, the hole is perpendicular to the ends of the valve, and the flow is closed. The ball valve can revolve 90°, which has large size and weight, but it has not only an enormously more excellent confidentiality than other valves in the severely high temperature and high pressure environment When the ball valve is in closed condition the pressure exerted on the ball valve body due to that high pressure fatigue stresses and strain develop on the body of valve. Because of the high pressure and temperature on the ball valve body leakage of body take place which cause safety issue and ball valve failure. By this research stress strain analysis of ball valve body obtains and identifies the maximum and minimum stress and strain produced on the body of ball valve. The Max stress by parts was confirmed through thermal-structural coupled field analysis of major parts to evaluate safety. The objective of this research is to examine the effect of pressure and temperatures on valve components its analysis and optimization

A characteristic analysis of high pressure and high temperature 3-way ball valve

2012 ◽  
Author(s):  
Joon Ho Lee ◽  
Rock Won Jeon ◽  
Si Pom Kim ◽  
Jae Hun Lee ◽  
Jae Hoon Lee
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Ball Valve ◽  
Characteristic Analysis

scholarly journals How to Seal Hydraulic Fracturing Boreholes in the Large-Size HDR Rocks under HTHP Conditions

Lithosphere ◽  
2021 ◽  
Vol 2021 (Special 5) ◽  
Author(s):  
Zhang Hongwei ◽  
Wan Zhijun ◽  
Yixin Zhao ◽  
Zhou Changbing ◽  
Zhu Chuanqi ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Hydraulic Fracturing ◽  
Laboratory Test ◽  
Heat Production ◽  
Injection Pressure ◽  
Large Size ◽  
High Injection ◽  
High Injection Pressure ◽  
Sealing Failure

Abstract The hydraulic fracturing (HF) is a key technique to enhance the permeability and heat production of hot-dry-rock (HDR) geothermal reservoirs. Normally, laboratory HF tests should be preconducted to understand the HF characteristics of HDR samples. However, in the laboratory test, sealing failure between boreholes and injection pipes always limits the experimental efficiency and data accuracy, especially for the HF tests under high-temperature and high-pressure (HTHP) conditions. Traditional sealing methods, such as rubber and cement sealing, are easy to be failed because of their poor load and/or thermal bear performance under HTHP conditions. Therefore, in this study, we proposed a novel HTHP seal by using wedge-buckled copper components and steel rings. The sealing efficiency was verified by successfully conducting the HF tests of HDR rocks with a dimension of φ200×400 mm under various high temperatures ranging from 100°C to 400°C. As expected, the unfavorable factors such as HTHP and high injection pressure could be turned into favorable ones during the introduced seal method. By this investigation, we expect to provide some sealing solutions for researchers when conducting HF tests under HTHP environments.

scholarly journals Structure optimization design of high-temperature, high-pressure nuclear power valve

DYNA ◽  
2020 ◽  
Vol 87 (213) ◽  
pp. 148-158
Author(s):  
Wei Li ◽  
Enda Li ◽  
Hao Chang ◽  
Jianrui Liu ◽  
Chang Li ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Stress Distribution ◽  
Nuclear Power ◽  
Optimization Design ◽  
Gate Valve ◽  
Equivalent Stress ◽  
High Stress ◽  
Temperature Deformation ◽  
Valve Body

The nuclear power valve is an important piece of equipment in any nuclear power system. The finite element method was used in this study to analyze the strength and rigidity of the high-temperature and high-pressure nuclear gate valve. The structural characteristics were optimized as per the parameters that affect the strength of the valve body. Fluid-solid coupling technology was utilized to investigate the temperature, deformation, and stress distributions in the structure. A high stress concentration was observed in the initial design; the maximum equivalent stress exceeded the allowable range. Three optimization methods were deployed in efforts to improve the stress distribution. The stress distribution was found to be more uniform post-optimization and the gate valve structure of all three schemes tested met the relevant stress requirements. The optimal scheme was then determined by further comparison. The results presented here may provide a theoretical reference for the optimization of nuclear power valve designs.

scholarly journals Analisis Perbedaan Tekanan Fluida pada Ball Valve Kondisi Full Closed dan Full Open dengan Computational Fluid Dynamics

2018 ◽  
Vol 4 (1) ◽  
Author(s):  
Meri Rahmi ◽  
Delffika Canra ◽  
Suliono Suliono
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
High Pressure ◽  
Fluid Flow ◽  
High Temperature ◽  
Fluid Pressure ◽  
Flow Simulation ◽  
Ball Valve ◽  
The Difference ◽  
Valve Ball

Ball valve is one type of rotary motion valve. Ball valve functions as a round disc-shaped ball-like controller. Ball valve is widely used because it is easy to repair and the ability in high pressure and high temperature. The fluid flow in the ball valve does not always flow, sometimes the flow is closed. This will affect the fluid pressure in the valve. Fluid pressure is also affected due to valve open condition. This study aims to analyze the difference of the fluid pressure in ball valve -4 inch ANSI during closed condition and open condition. The method used is Computational Fluid Dynamics with f Flow Simulation Solidworks software. The analysis was performed for two valve conditions with a temperature of 425 °C. Decrease in pressure does not significantly affect the condition of the ball valve, even when the temperature of the fluid is high. The difference of fluid pressure between full closed condition and full open is only 0.01 psi.

scholarly journals Performance Test of Large Size Valves with Co-free Seat Materials for High Temperature and High Pressure Services

2002 ◽  
Vol 51 (10) ◽  
pp. 467-474
Author(s):  
Kikuo Takeshima ◽  
Shin Kumagai ◽  
Yoshiteru Chiba ◽  
Shigeyuki Ezoe ◽  
Katsumi Hirano
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Performance Test ◽  
Large Size

New assembly design suitable for tower-shaped large size single-crystal diamond growth under high pressure and high temperature

CrystEngComm ◽  
2017 ◽  
Vol 19 (1) ◽  
pp. 137-141 ◽  
Author(s):  
Yadong Li ◽  
Xiaopeng Jia ◽  
Ning Chen ◽  
Liangchao Chen ◽  
Longsuo Guo ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Single Crystal ◽  
Diamond Growth ◽  
Assembly Design ◽  
Large Size ◽  
Single Crystal Diamond

Improving Rate of Penetration in High Pressure High Temperature Gas Wells by Utilization of Managed Pressure Drilling and Artificial Intelligence

2021 ◽  
Author(s):  
Ahmed Ghamdi ◽  
Ahmed Saihati ◽  
Mohamed Abdelrahman ◽  
Mahmoud Omar ◽  
Abdulazeez Abdulraheem
Keyword(s):  
Artificial Intelligence ◽  
High Pressure ◽  
High Temperature ◽  
Well Drilling ◽  
Rate Of Penetration ◽  
High Pressure High Temperature ◽  
Managed Pressure Drilling ◽  
Weight On Bit ◽  
Minimum Stress ◽  
Fracture Gradient

Abstract Drilling in deep high-pressure high-temperature (HPHT) abrasive sandstone pose significant challenges: low rate of penetration (ROP), bit wear, differential sticking, and wellbore instability issues. These issues are magnified when attempting to drill long laterals in the direction of minimum stress. This paper focuses on the use of Managed Pressure Drilling (MPD) and Artificial Intelligence (AI) analytics to improve ROP. MPD is normally used to help drilling in formations with narrow mud weight window, it achieves this by controlling the surface backpressure to keep the annular pressure in the wellbore above the pore pressure and below the fracture gradient. One key benefit of using MPD is that high mud weight is no longer required, since the Equivalent Circulating Density (ECD) is going to be managed to maintain the overbalance. An example of a well that was drilled using MPD solely for ROP improvement is presented in this paper. This well achieved almost double the ROP of a control well, which was drilled in the same formation with no MPD. Essentially most of the drilling parameters used, which include, pump rate, revolution per minute (RPM), weight on bit (WOB), and other drilling practices, are controlled by the people on the rig. Incorporating AI analytics in the equation, help minimizes human intervention and could achieve further improvement in ROP. After the ROP improvement observed while using MPD, both technologies were combined in a well drilling the same formation. An example is presented for the well drilled using both technologies.

scholarly journals High-temperature superconductor of sodalite-like clathrate hafnium hexahydride

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Prutthipong Tsuppayakorn-aek ◽  
Nakorn Phaisangittisakul ◽  
Rajeev Ahuja ◽  
Thiti Bovornratanaraks
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
High Temperature Superconductors ◽  
Zero Point ◽  
The Body ◽  
Potential Candidate ◽  
Superconducting Transition ◽  
Point Energy ◽  
Remarkable Result ◽  
Pressure Phase

AbstractHafnium hydrogen compounds have recently become the vibrant materials for structural prediction at high pressure, from their high potential candidate for high-temperature superconductors. In this work, we predict $$\hbox {HfH}_{6}$$ HfH 6 by exploiting the evolutionary searching. A high-pressure phase adopts a sodalite-like clathrate structure, showing the body-centered cubic structure with a space group of $$Im\bar{3}m$$ I m 3 ¯ m . The first-principles calculations have been used, including the zero-point energy, to investigate the probable structures up to 600 GPa, and find that the $$Im\bar{3}m$$ I m 3 ¯ m structure is thermodynamically and dynamically stable. This remarkable result of the $$Im\bar{3}m$$ I m 3 ¯ m structure shows the van Hove singularity at the Fermi level by determining the density of states. We calculate a superconducting transition temperature ($$T_{c}$$ T c ) using Allen-Dynes equation and demonstrated that it exhibits superconductivity under high pressure with relatively high-$$T_{c}$$ T c of 132 K.

Microstructural Study of Diamond Deformed Under High Pressure and Temperature

1985 ◽  
Vol 43 ◽  
pp. 230-231
Author(s):  
E. F. Koch
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Lattice Structure ◽  
Diamond Particle ◽  
Polycrystalline Diamond ◽  
Sintering Process ◽  
Ion Milling ◽  
Sintered Compact ◽  
Transmission Electron ◽  
High Pressure Sintering

Because of the extremely rigid lattice structure of diamond, generating new dislocations or moving existing dislocations in diamond by applying mechanical stress at ambient temperature is very difficult. Analysis of portions of diamonds deformed under bending stress at elevated temperature has shown that diamond deforms plastically under suitable conditions and that its primary slip systems are on the ﹛111﹜ planes. Plastic deformation in diamond is more commonly observed during the high temperature - high pressure sintering process used to make diamond compacts. The pressure and temperature conditions in the sintering presses are sufficiently high that many diamond grains in the sintered compact show deformed microtructures.In this report commercially available polycrystalline diamond discs for rock cutting applications were analyzed to study the deformation substructures in the diamond grains using transmission electron microscopy. An individual diamond particle can be plastically deformed in a high pressure apparatus at high temperature, but it is nearly impossible to prepare such a particle for TEM observation, since any medium in which the diamond is mounted wears away faster than the diamond during ion milling and the diamond is lost.

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