scholarly journals Design and Implementation of an Automated Gamma Probe for Jet Boring Uranium Mining

2016 ◽  
Vol 2 (3) ◽  
Author(s):  
Kasmet T. Niyongabo ◽  
Scott B. Nokleby
Keyword(s):  
Gamma Probe ◽  
Uranium Mine ◽  
Hole Drilling ◽  
Functional Testing ◽  
Test Results ◽  
Proof Of Concept ◽  
Pilot Hole ◽  
Software And Hardware ◽  
Flux Probe ◽  
Radiometric Data

A proof-of-concept detector prototype capable of collecting and storing radiometric data in the jet boring system (JBS) during pilot hole drilling at the Cigar Lake uranium mine is presented. Cigar Lake is the world’s second highest known grade uranium mine and is located in northern Saskatchewan, Canada. Variant design is used to design, develop, test, and implement the detector’s firmware, software, and hardware. The battery-powered detector is attached inside a JBS drill rod to collect radiometric data through the drilling cycle. A readout box is used to initiate the detector, recharge the battery, and download radiometric data after the pilot hole drilling cycle is complete. Functional testing results are presented, and comparative test results between the JBS gamma probe and the AlphaNUCLEAR Hi-Flux probe are evaluated. Field data collected from a pilot hole are plotted against the pilot hole’s driving layout and jetting recipe to show the accuracy of the readings collected.

Frequency Shift in Drilling due to Margin Engagement

2005 ◽  
Vol 127 (2) ◽  
pp. 271-276 ◽  
Author(s):  
D. N. Dilley ◽  
D. A. Stephenson ◽  
P. V. Bayly ◽  
A. J. Schaut
Keyword(s):  
Frequency Shift ◽  
Three Dimensional ◽  
Hole Drilling ◽  
Frequency Increase ◽  
Element Analysis ◽  
Pilot Hole ◽  
Frequency Matching ◽  
The Past ◽  
Chatter Prediction ◽  
Embedded Model

Drill chatter degrades hole roundness, hole size, and tool life. This wastes time and money in tools, scrap, and hole rework. Chatter prediction in milling and turning has shown significant benefit to industry; however, researchers have been unable to accurately predict chatter in drilling applications. In the past, the drill, including the chisel edge, was modeled as either a fixed-fixed or fixed-pinned beam (Tekinalp, O., and Ulsoy, A. G., 1989, “Modeling and Finite Element Analysis of Drill Bit Vibrations,” ASME J. Eng. Indust. 111, pp. 148–154), but more recent research (Dilley, D. N., Bayly, P. V., and Schaut, A. J., 2005, “Effects of the Chisel Edge on the Chatter Frequency in Drilling,” J. Sound Vib., 281, pp. 423–428) has shown that a fixed-embedded model using springs improves frequency matching. The effects of the drill margins on dynamics have not been studied. The fixed-fixed or fixed-pinned model will be shown to be inappropriate for modeling the effects of margin engagement, while the spring-end boundary condition can better approximate the frequency increase observed experimentally as the drill margins engage deeper into the hole. In addition, the shifted frequency is well below the frequency found from an analytical fixed-fixed or fixed-pinned beam. Evidence that the margins cause the frequency shift is seen in three-dimensional waterfall plots that show this shift for pilot hole drilling (in which the margins are engaged), but not for tube drilling (in which margins are not engaged).

Integration Success Story in Shilaif Shale Oil from Vertical Pilot to Horizontal

2021 ◽  
Author(s):  
Amena Dhawi Alharthi ◽  
Pierre Van Laer ◽  
Trevor Brooks ◽  
Pierre Olivier Goiran ◽  
Muhammad Zeeshan Baig ◽  
...  
Keyword(s):  
Reservoir Characterization ◽  
Analysis Data ◽  
Production Test ◽  
Fluid Composition ◽  
Shale Oil ◽  
Test Results ◽  
Deep Basin ◽  
Pilot Hole ◽  
Unconventional Oil ◽  
Intrashelf Basin

Abstract The development of unconventional target in the Shilaif formation is in line with the Unconventional objective towards adding to ADNOC reserves. For future optimization of development plans, it is of utmost importance to understand and test and therefore prove the productivity of the future Unconventional Horizontal Oil wells. The Shilaif formation was deposited in a deeper water intrashelf basin with thicknesses varying from 600 to 800 ft from deep basin to slope respectively. The formation is subdivided into 3 main composite sequences each with separate source and clean tight carbonates. The well under consideration (Well A-V for the vertical pilot and Well A-H for the horizontal wellbore) was drilled on purpose in a deep synclinal area to access the best possible oil generation and maturity in these shale Oil plays. Due to the stacked nature of these thick high-quality reservoirs, a pilot well is drilled to perform reservoir characterization and test hydrocarbon type and potential from each bench. Fracturing and testing are performed in each reservoir layer for the primary purpose to evaluate and collect key fracturing and reservoir parameter required to calibrate petrophysical and geomechanical model, landing target optimization and ultimately for the design of the development plan of this stacked play. Frac height, reservoir fluid composition and deliverability, pore pressure are among key data collected. The landing point selected based on the comprehensive unconventional core analysis integrated with petrophysical and geomechanical outcomes using post vertical frac and test results. Well A-H was drilled as a sidetrack from the pilot hole Well A-V. This lateral section was logged with LWD Triple Combo while Resistivity Image was acquired on WL. Based on the logging data the well stayed in the target Layer / formation, cutting analysis data for XRD and TOC was integrated with the petrophysical results in A-H well. Production test results from subject were among the highest rate seen during exploration and appraisal of this unconventional oil plays and compete with the current commercial top tier analog unconventional oil plays. Achieving those results in such early exploration phases is huge milestone for ADNOC unconventional exploration journey in UAE and sign of promising future development.

scholarly journals An Exploration of Augmented Reality in Computer Assisted Orthopaedic Surgery

10.29007/72d4 ◽  
2018 ◽  
Author(s):  
He Liu ◽  
Edouard Auvinet ◽  
Joshua Giles ◽  
Ferdinando Rodriguez Y Baena
Keyword(s):  
Augmented Reality ◽  
Three Dimensional ◽  
Hole Drilling ◽  
Depth Information ◽  
Computer Assisted ◽  
Pilot Hole ◽  
Surgical Workflow ◽  
Processing Depth ◽  
Computer Assisted Orthopaedic Surgery ◽  
Preoperative Plan

Computer Aided Surgery (CAS) is helpful, but it clutters an already overcrowded operating theatre, and tends to disrupt the workflow of conventional surgery. In order to provide seamless computer assistance with improved immersion and a more natural surgical workflow, we propose an augmented-reality based navigation system for CAS. Here, we choose to focus on the proximal femoral anatomy, which we register to a plan by processing depth information of the surgical site captured by a commercial depth camera. Intra-operative three-dimensional surgical guidance is then provided to the surgeon through a commercial augmented reality headset, to drill a pilot hole in the femoral head, so that the user can perform the operation without additional physical guides. The user can interact intuitively with the system by simple gestures and voice commands, resulting in a more natural workflow. To assess the surgical accuracy of the proposed setup, 30 experiments of pilot hole drilling were performed on femur phantoms. The position and the orientation of the drilled guide holes were measured and compared with the preoperative plan, and the mean errors were within 2mm and 2°, results which are in line with commercial computer assisted orthopedic systems today.

scholarly journals Effect of Laser Parameters on Sequential Laser Beam Micromachining and Micro Electro-Discharge Machining

2021 ◽  
Author(s):  
Mir Akmam Noor Rashid ◽  
Tanveer Saleh ◽  
Wazed Ibne Noor ◽  
Mohamed Sultan Mohamed Ali
Keyword(s):  
Laser Beam ◽  
Laser Power ◽  
Short Circuit ◽  
Scanning Speed ◽  
Hole Drilling ◽  
Machining Time ◽  
Research Attention ◽  
Pilot Hole ◽  
Electro Discharge Machining ◽  
Input Parameters

Abstract Laser beam micromachining (LBMM) and micro electro-discharge machining (µEDM) based sequential micromachining technique, LBMM-µEDM has drawn significant research attention to utilizing the advantages of both methods, i.e. LBMM and µEDM. In this process, a pilot hole is machined by the LBMM and subsequently finishing operation of the hole is carried out by the µEDM. This paper presents an experimental investigation on the stainless steel (type SS304) to observe the effects of laser input parameters (namely laser power, scanning speed, and pulse frequency) on the performance of the finishing technique that is the µEDM in this case. The scope of the work is limited to 1-D machining, i.e. drilling micro holes. It was found that laser input parameters mainly scanning speed and power influenced the output performance of µEDM significantly. Our study suggests that if an increased scanning speed at a lower laser power is used for the pilot hole drilling by the LBMM process, it could result in significantly slower µEDM machining time. On the contrary, if the higher laser power is used with even the highest scanning speed for the pilot hole drilling, then µEDM processing time was faster than the previous case. Similarly, µEDM time was also quicker for LBMMed pilot holes machined at low laser power and slow scanning speed. Our study confirms that LBMM-µEDM based sequential machining technique reduces the machining time, tool wear and instability (in terms of short circuit count) by a margin of 2.5 x, 9 x and 40 x respectively in contrast to the pure µEDM process without compromising the quality of the holes.

MOBILE MEDIA LITERATURE APPLICATION FOR IDENTIFICATION OF STUDENT'S READING INTEREST

2021 ◽  
Vol 3 (4) ◽  
pp. 385-394
Author(s):  
Usman Nurhasan ◽  
Erninda Ristiani ◽  
Samsul Islam Baddrisshofa
Keyword(s):  
Literacy Programs ◽  
Online Media ◽  
Functional Testing ◽  
Test Results ◽  
Mobile Media ◽  
Average Percentage ◽  
Online Literacy ◽  
Literacy Activities ◽  
Education Needs ◽  
Reading Interest

The School Literacy Movement (GLS) aims to foster youth character through a culture of literacy (reading and writing). However, in the presence of the Covid-19 outbreak, Indonesian education needs to use online media to keep learning going. Many types of platforms are used for online learning media, but all of these media do not support school literacy activities, so school literacy activities do not run as usual. Based on these problems, a solution was created, namely an application that makes it easy for literacy activities to take place online. Students can access this application to do online literacy via a laptop or smartphone. This application makes it easier for teachers to monitor the course of online literacy programs. The results of this study are indicated by functional testing on all features obtaining a 100% valid percentage. Tests on users get an average percentage of more than 80%. The test results prove that this application can be accepted by students, teachers and admins at State High School 1 Geger Madiun to make literacy activities more effective and efficient.

scholarly journals Spectral Line Reflectance and Fluorescence Imaging Device for Skin Diagnostics

2020 ◽  
Vol 10 (21) ◽  
pp. 7472
Author(s):  
Janis Spigulis ◽  
Zigmars Rupenheits ◽  
Uldis Rubins ◽  
Madars Mileiko ◽  
Ilze Oshina
Keyword(s):  
Spectral Line ◽  
Recovery Process ◽  
Test Results ◽  
Proof Of Concept ◽  
Imaging Device ◽  
Fluorescence Image ◽  
Distribution Maps ◽  
Prototype Device ◽  
Line Imaging

The multi-spectral-line imaging concept, which was recently implemented for the snapshot mapping of three main skin chromophores—melanin, oxy-hemoglobin, and deoxy-hemoglobin, is further explored for the snapshot capturing of four spectral line images at wavelengths of 450, 523, 638, and 850 nm, with the consecutive acquiring of a 405 nm excited fluorescence image. A corresponding laser-based prototype device was designed and assembled. Processing of the mentioned five images enables obtaining distribution maps of four skin chromophores within the malformation and comparing their mean fluorescence intensity with that of the surrounding healthy skin. This set of information is helpful for dermatologists, cosmetologists, oncologists, and other healthcare professionals to quantify the diagnosis of skin malformations (including cancers) and to follow up the recovery process after therapy. This paper describes the design of the developed proof-of-concept prototype device and initial test results.

Measurement of Residual Stress in Water Pipe Welds Using the Hole-Drilling Technique

2007 ◽  
Vol 353-358 ◽  
pp. 2419-2422
Author(s):  
Jung Hun Choi ◽  
Jong Hyun Baek ◽  
Dae Jin Kim ◽  
Jae Mean Koo ◽  
Chang Sung Seok
Keyword(s):  
Residual Stress ◽  
Size Effect ◽  
Standard Specimen ◽  
Weld Zone ◽  
Hole Drilling ◽  
Test Results ◽  
Water Pipe ◽  
Fatigue Load ◽  
Drilling Technique ◽  
Fatigue Characteristics

In case of large steel water pipe, it have been observed that its fracture mostly occurs due to the complicated outside fatigue load on the pipe in the underground. It is also well known that its damage and leakage happen mainly in a weld zone. In this study we evaluated the fatigue characteristics based on size effect and residual stress by comparing the test results on the standard specimen collected from real pipe with those on full scale pipe.

Software and hardware developments for remote participation in TJ-II operation. Proof of concept using the NPA diagnostic

2002 ◽  
Vol 60 (3) ◽  
pp. 487-492 ◽  
Author(s):  
A. López ◽  
J. Vega ◽  
A. Montoro ◽  
E. Sánchez ◽  
J. Encabo ◽  
...  
Keyword(s):  
Proof Of Concept ◽  
Software And Hardware ◽  
Remote Participation

The role of gamma probe activity counts in minimally invasive parathyroidectomy

2004 ◽  
Vol 43 (06) ◽  
pp. 190-194 ◽  
Author(s):  
A. Aydın ◽  
C. Tassci ◽  
K. Atila ◽  
M. A. Koçdor ◽  
A. Sevinç ◽  
...  
Keyword(s):  
Gamma Probe ◽  
Minimally Invasive Parathyroidectomy ◽  
The Other ◽  
Rank Test ◽  
Test Results ◽  
Invasive Parathyroidectomy ◽  
The Mean ◽  
99Mtc Mibi ◽  
Wilcoxon Rank Test

Summary Aim: The benefit of preoperative gamma probe in the diagnosis of adenoma in patients with histopathologically proven parathyroid (PT) adenomas was examined. Patients, material, methods: 20 patients with positive 99mTc MIBI uptake in PT scintigraphy with primary hyper-parathyroidism were enrolled in this study. 740 MBq 99mTc MIBI were injected 3 h before operation. Counts of four PT regions were obtained with gamma probe before surgery in the operation room. All suspected PT adenomas were resected and histopathologically diagnosed as adenomas. We also obtained counts of the resection region and the resected adenoma with gamma probe after the parathyroidectomy. Preoperative counts of adenoma bearing regions (ABR), non-adenoma bearing regions (NABR), postoperative resection region (PRR), resected adenoma counts (RA) were registered. Statistical analysis was performed by Wilcoxon rank test. Results: The mean counts of ABR, NABR, the PRR and RA were 462 ± 106, 230 ± 66, 164 ± 42, 374 ± 87, respectively. The mean counts from ABR were twofold higher than those of NABR. The PRR mean counts decreased by 64% when compared to the mean counts of ABR and by 55% when compared to the mean counts of RA. The differences in mean counts of ABR and NABR, PRR and ABR, PRR and RA (p <0.01) turned out as statistically significant. Discussion: According to our preliminary results, the region with the highest counts is at least 2 ± 0,4 times higher than the mean of the other three PT regions. Thus, it seems to be significant for PT adenoma. Resection of adenoma may be accepted as successful, if the count of ABR decreased more than 64% with decreased postoperative parathormone levels. Conclusion: This technique should not yet be applied instead of parathormone measurement or frozen technique. But it may replace the frozen technique used for confirmation of the diagnosis during the operation in the future.

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