Field Tests of a New Generation of Flow Control Unit Able to Prevent the Gas Breakthrough in Oil Wells

Controlling Flow Rate and Fluid Level by Variable Frequency Drive Unit The Variable Frequency Drive (VFD) is used to control the speed of the pumpmotor to attain the desired flow rate and fluid level in a fluid system. An AC drive provides efficient flow control by varying the pump-motor speed. The comparison of energy requirements and costs in a system where a throttling device is used for flow control on a centrifugal pump with the power used when an variable frequency drive (VFD) is used to control the same flow, evidently shows potential savings. In this system, AC Motor Frequency drive and static pressure transmitter, turbine type flowmeter and Analog/Digital cards, micro-control unit and computer connection are designed specially to control flow rate, fluid flow type (turbulence or laminar) and water level at the different conditions with different PID parameters.

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Xenon Flow Control Unit Development and Qualification Programme

42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit ◽

10.2514/6.2006-4847 ◽

2006 ◽

Author(s):

Peter Smith

Keyword(s):

Flow Control ◽

Control Unit

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Evaluation of Interface Modality Effectiveness for Remotely-Controlled Locomotives

Proceedings of the Human Factors and Ergonomics Society Annual Meeting ◽

10.1177/1071181319631150 ◽

2019 ◽

Vol 63 (1) ◽

pp. 2211-2215

Author(s):

So Young Kim ◽

Neeraja Subrahmaniyan ◽

James D. Brooks

Keyword(s):

Remote Control ◽

Interface Design ◽

Control Unit ◽

Control Mode ◽

Game Controller ◽

Control Units ◽

Current Design ◽

Command Input ◽

Operator Control ◽

New Generation

The use of remote-control locomotives has become prevalent in most major rail yards in North America. Despite their increased use, they are limited by the functionality and current design of the operator control unit. Human factors research has identified interface design issues with the controller, emphasizing the need to rethink a new generation of remote-control units that can accommodate the growing needs of operational functionality through effective interface design. Towards that goal, we present the preliminary findings of an exploratory study comparing the functional effectiveness and usability of two types of remote-control modalities – a traditional gaming controller and a multi-touch tablet – to drive a locomotive. Initial findings indicate that the game controller modality is preferred over multi-touch, with low variation among participants. However, the preference of control mode (i.e., vehicle power or speed command input) was different for the two modalities. These initial findings are the first of their kind in identifying initial design considerations for future remote locomotive operation and in comparing the use of traditional gaming and multi-touch controllers.

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Abstract 1122‐000245: Carotid Artery Revascularization Using Walrus Balloon Guide Catheter: Safety and Feasibility from US Multicenter Experience

Stroke: Vascular and Interventional Neurology ◽

10.1161/svin.01.suppl_1.000245 ◽

2021 ◽

Vol 1 (S1) ◽

Author(s):

Mohamed Salem ◽

Svetlana Kvint ◽

Ammad A Baig ◽

Andre Monteiro ◽

Gustavo Cortez ◽

...

Keyword(s):

Carotid Artery ◽

Flow Control ◽

Femoral Access ◽

Guide Catheter ◽

Institutional Experience ◽

Protection Devices ◽

Procedural Success ◽

Favorable Safety ◽

New Generation

Introduction : The Walrus Balloon Guide Catheter (BGC) is a new generation of BGC, designed to eliminate conventional BGC limitations during mechanical thrombectomy (MT). We report a multi‐institutional experience using this BGC for proximal flow‐control (PFC) in the setting of carotid artery angioplasty/stenting (CAS) in elective (eCAS) and tandem strokes (tCAS). Methods : Prospectively maintained databases at 7 North‐American Centers were queried to identify patients with cervical carotid disease undergoing eCAS/tCAS with Walrus BGC. Results : 110 patients (median age 68, 64.6% males) undergoing 80 eCAS (72.7%) and 30 tCAS (27.3%) procedures were included (median cervical carotid stenosis 90%; 41.8% with contralateral stenosis). Utilizing proximal flow‐arrest technique in 87.2% and flow‐reversal in 12.8% of procedures, the Walrus was navigated into the common carotid artery (CCA) successfully in all cases despite challenging arch anatomy (28.2%), with preferred femoral access (93.6%) and in conscious sedation (81.8%). Angioplasty and distal embolic protection devices (EPD) were used in 83.7% and 52.7% of procedures, respectively. tCAS led to a mTICI 2b/3 in all cases. Periprocedural ischemic stroke (till 30‐days post‐operatively) rate was 0.9% and remote complications occurred in 1.8% of the cases. Last follow‐up mRS of 0–2 was seen in 95.3% of eCAS cohort, with no differences in complications in the eCAS subgroup between PFC only versus PFC and distal EPD (median follow‐up 4.1 months). Conclusions : Walrus BGC for proximal flow‐control is safe and effective during eCAS and tCAS. Procedural success was achieved in all cases, with favorable safety and functional outcomes on short term follow‐up.

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Delay-Guaranteed Scheduling and Flow Control for New Generation Mobile Networks

IEICE Transactions on Communications ◽

10.1587/transcom.e94.b.1556 ◽

2011 ◽

Vol E94-B (6) ◽

pp. 1556-1564 ◽

Cited By ~ 1

Author(s):

Ngoc-Thai PHAM ◽

Rentsent ENKHBAT ◽

Won-Joo HWANG

Keyword(s):

Flow Control ◽

Mobile Networks ◽

New Generation

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Laboratory and Field Tests on Titanium for Oil Field Pump and Valve Parts

CORROSION ◽

10.5006/0010-9312-17.11.16 ◽

1961 ◽

Vol 17 (11) ◽

pp. 16-30

Author(s):

F. W. Jessen ◽

Ricardo J. Molina

Keyword(s):

Crude Oil ◽

Laboratory Tests ◽

Field Tests ◽

Oil Wells ◽

Oil Field ◽

Lower Price ◽

Oil Well ◽

Competitive Disadvantage ◽

Sour Crude ◽

Gas Lift

Abstract Laboratory and field tests are reported for titanium parts for gas lift valves and down-hole oil well pumps. While titanium performed well in the laboratory tests using aerated fluids, and did well in field tests of gas lift wells, similar trials in wells pumping sour crude oil well showed titanium to be inferior to normally used materials. Authors conclude titanium is suitable for use in gas lift valves and could be competitive to presently used materials at a lower price. They conclude titanium is not suitable for use in oil well pumps, but might perform better if hardened. It also is at a competitive disadvantage to commonly used materials costwise. While titanium is cathodic to materials commonly used in oil wells, no marked corrosion was attributed to this property after exposure of coupon sets in a producing well. Titanium was found resistant to abrasion by sand-laden aerated oil well fluids in laboratory tests. 6.3.15, 8.4.3

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Field Tests of New Generation Hydraulic Deep Penetration Technology

Energy Sources Part A Recovery Utilization and Environmental Effects ◽

10.1080/15567036.2010.544011 ◽

2014 ◽

Vol 36 (17) ◽

pp. 1850-1856

Author(s):

G. Li ◽

J. Xiong ◽

Z. Huang ◽

J. Niu ◽

M. Wang ◽

...

Keyword(s):

Field Tests ◽

Deep Penetration ◽

New Generation

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Using a Neural Network to Minimize Pressure Spikes for Binary-coded Digital Flow Control Units

International Journal of Fluid Power ◽

10.13052/ijfp1439-9776.2033 ◽

2020 ◽

Author(s):

Essam Elsaed ◽

Mohamed Abdelaziz ◽

Nabil A. Mahmoud

Keyword(s):

Neural Network ◽

Power Systems ◽

Flow Control ◽

Control Unit ◽

Pulse Number ◽

Tracking Accuracy ◽

Neural Network Controller ◽

Control Units ◽

Unique Method ◽

Fluid Power Systems

A unique method of improving energy efficiency in fluid power systems is called digital flow control. In this paper, binary coding control is utilized. Although this scheme is characterized by a small package size and low energy consumption, it is influenced by higher pressure peaks and larger transient uncertainty than are other coding schemes, e.g., Fibonacci coding and pulse number modulation, consequently resulting in poor tracking accuracy. This issue can be solved by introducing a delay in the signal opening/ closing of the previous or subsequent valve, thus providing sufficient time for state alteration and valve processes. In a metering-in velocity control circuit, a feedforward neural network controller was used to create artificial delays according to the pressure difference over the digital flow control unit (DFCU) valves. The delayed signal samples fed to the controller were acquired through the genetic algorithm method, and the analysis was performed with MATLAB software.

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