Ion trajectory control by computer output through isolation amplifier circuit

2013 ◽  
Vol 8 (6) ◽  
pp. 599-602 ◽  
Author(s):  
Yuta Yamamoto ◽  
Shuichi Hasegawa
Keyword(s):  
Trajectory Control ◽  
Amplifier Circuit ◽  
Ion Trajectory ◽  
Isolation Amplifier ◽  
Computer Output

A High Efficiency Variable Gain Amplifier Circuit with Controllable Transconductance Amp

2009 ◽  
Vol 129 (10) ◽  
pp. 1968-1969
Author(s):  
Tetsuro Okura ◽  
Shunsuke Okura ◽  
Toru Ido ◽  
Kenji Taniguchi
Keyword(s):  
High Efficiency ◽  
Variable Gain Amplifier ◽  
Amplifier Circuit ◽  
Variable Gain

scholarly journals Wellbore trajectory control tool seal system leakage analysis based on steady gap flow

2020 ◽  
Vol 12 (6) ◽  
pp. 168781402093046 ◽  
Author(s):  
Lei Shi ◽  
Keqiang Wang ◽  
Ding Feng ◽  
Hong Zhang ◽  
Peng Wang
Keyword(s):  
Prediction Method ◽  
Electronic System ◽  
Contact Length ◽  
Trajectory Control ◽  
Analysis Model ◽  
Rotating Shaft ◽  
Element Analysis ◽  
Gap Flow ◽  
Total Leakage ◽  
Gap Height

Lubricant leakage will inevitably occur during the working process of wellbore trajectory control tools. Even including the lubricant compensation system, serious leakage will still cause lacks lubrication of the internal mechanical structure as well as electronic system damaged by external infiltration fluid, especially when it comes to battery sub and other electronic equipment. Seal system leakage prediction method was presented based on the assumption of steady gap flow. It is assumed that there is a constant gap between the lip seal and the rotating shaft, the gap height is determined by oil film thickness, and the length of the gap was determined by the contact analysis using the Mooney–Rivlin constitutive model. The analysis results show that the contact length between the primary seal lip and the rotary shaft is about 0.1 mm under the condition of ensuring the contact between the deputy seal lip and the rotary shaft. The overall lubricant leakage finite element analysis model was established, and the relationship between the internal lubricant pressure of the tool and the total leakage was obtained. The results of analysis indicate that under the internal pressure of 0.03 MPa, the lubricant leakage is approximately 6 mL/h, which was verified by experiments.

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