Design and performance of a high temperature/high pressure, hydrogen tolerant, bend insensitive single-mode fiber for downhole seismic systems and applications

2014 ◽  
Author(s):  
Andy Gillooly ◽  
Judith Hankey ◽  
Mark Hill ◽  
Laurence Cooper ◽  
Aurélien Bergonzo
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Single Mode ◽  
Single Mode Fiber ◽  
And Performance ◽  
High Temperature High Pressure ◽  
Pressure Hydrogen

scholarly journals Numerical Simulation and Design of a High-Temperature, High-Pressure Fluid Transport Pipe

2020 ◽  
Vol 10 (17) ◽  
pp. 5890
Author(s):  
Jiyoung Yoon ◽  
Junkyu Park ◽  
Jinhyoung Park
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
High Pressure ◽  
High Temperature ◽  
Low Temperature ◽  
Fluid Transport ◽  
Projectile Velocity ◽  
Gas Leakage ◽  
And Performance ◽  
High Temperature High Pressure

When designing a hand caliber with a high-temperature, high-pressure internal fluid transport pipe, reliability, safe use, and performance must be considered. Reliability refers to the stress caused by thermo-mechanical load; safe use refers to the low-temperature burns that might occur upon contact, and high-temperature burns caused by gas leakage occurring in the cylinder gap; and performance refers to projectile velocity. In this study, numerical simulation methods for heat transfer, structure analysis, and gas leakage are proposed so that solutions can be designed to account for the above three criteria. Furthermore, a hand-caliber design guide is presented. For heat transfer and structural analysis, mesh size, the transient convective heat transfer coefficient, and boundary conditions are described. Regarding gas leakage, methods reflecting projectile motion and determination of the molecular weight of the propellant are described. As a result, a designed hand caliber will have a high reliability, because the thermo-mechanical stress is lower than the yield stress. There will be little risk of low-temperature burns, but there will be a high temperature-burn risk, owing to gas leakage in the cylinder gap. The larger the cylinder-gap size, the greater the gas leakage and the smaller projectile velocity. The presented numerical simulation method can be applied to evaluate various aspects of other structures that require high-temperature, high-pressure fluid-transport pipes.

Usage of Nano Silica in Synthetic Based Mud: A Comparison Study for High Temperature High Pressure Well

2015 ◽  
Vol 789-790 ◽  
pp. 80-84
Author(s):  
Muhammad Aslam Md Yusof ◽  
Norazwan Wahid ◽  
Nor Hazimastura Hanafi
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Prolonged Exposure ◽  
Comparison Study ◽  
Nano Silica ◽  
Nanoparticles Concentration ◽  
And Performance ◽  
20 Nm ◽  
Rheology Modifier ◽  
High Temperature High Pressure

Synthetic based mud has been widely used in the drilling operation because of its good properties. However, prolonged exposure of the mud in high temperature causes degradation of the good mud properties because of chemical instability. Because of that concern, this study intends to improve the performance of SBM with nanosilica at different concentration in high temperature high pressure (HTHP) applications. nanosilica with size of 10-20 nm has been selected for this study. The involving parameters in this study include the manipulation of nanoparticles concentration by total mud weight between 0 to 1.78 wt. %, and performance at temperature up to 350°F. The enhanced formulation has given significant benefits by reducing the filtration up to 41.67% and act as the rheology modifier in HTHP condition. Moreover, the optimum amount of nanosilica is 0.71% of total mud weight to avoid further rheological and filtration degradation.

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