Results 41 to 50 of about 860,603 (418)
Orthopaedic Journal of Sports Medicine, 2020 Background: Microfracture (MFx) is one of the most common techniques used for the treatment of articular cartilage defects, although recently there has been a trend toward the use of drilling rather than MFx for the treatment of these defects.
M. Kraeutler +4 more
semanticscholar +1 more source
DREAMS: Drilling and Extraction Automated System [PDF]
arXiv, 2021 Drilling and Extraction Automated System (DREAMS) is a fully automated prototype-drilling rig that can drill, extract water and assess subsurface density profiles from simulated lunar and Martian subsurface ice. DREAMS system is developed by the Texas A&M drilling automation team and composed of four main components: 1- tensegrity rig structure, 2 ...
arxiv
How to recognise a kick : A cognitive task analysis of drillers’ situation awareness during well operations [PDF]
, 2016 Acknowledgements This article is based on a doctoral research project of the first author which was sponsored by an international drilling rig operator.
Cleland, J., Flin, R., Roberts, R.
core +2 more sources
A Novel Concentric Tube Steerable Drilling Robot for Minimally Invasive Treatment of Spinal Tumors Using Cavity and U-shape Drilling Techniques [PDF]
arXiv, 2023 In this paper, we present the design, fabrication, and evaluation of a novel flexible, yet structurally strong, Concentric Tube Steerable Drilling Robot (CT-SDR) to improve minimally invasive treatment of spinal tumors. Inspired by concentric tube robots, the proposed two degree-of-freedom (DoF) CT-SDR, for the first time, not only allows a surgeon to ...
arxiv
Well Control Space Out: A Deep-Learning Approach for the Optimization of Drilling Safety Operations
IEEE Access, 2021 As drilling of new oil and gas wells increase to meet energy demands, it is essential to optimize processes to ensure the health and safety of the crew as well as the protection of the environment.
Arturo Magana-Mora +9 more
doaj +1 more source
Full and half-wavelength ultrasonic percussive drills [PDF]
, 2018 Ultrasonic-percussive drills are a leading technology for small rock drilling applications where power and weight-on-bit are at a premium. The concept uses ultrasonic vibrations to excite an oscillatory motion in a free-mass, which then delivers ...
Harkness, Patrick +2 more
core +1 more source
Methane contamination of drinking water accompanying gas-well drilling and hydraulic fracturing
Proceedings of the National Academy of Sciences of the United States of America, 2011 Directional drilling and hydraulic-fracturing technologies are dramatically increasing natural-gas extraction. In aquifers overlying the Marcellus and Utica shale formations of northeastern Pennsylvania and upstate New York, we document systematic ...
S. Osborn +3 more
semanticscholar +1 more source
International Journal of Ageing and Later Life, 2018 Gerontology has a longstanding tradition of researching the relationship between older adults and their socio-spatial environments. However, environmental gerontology often shares a positivistic understanding of space as either a “prosthetic” or a ...
Anna Wanka +2 more
doaj +1 more source
Haiti-Drill: an amphibious drilling project workshop [PDF]
Scientific Drilling, 2020 Abstract. The Haiti region – bounded by two strike-slip faults expressed both onshore and offshore – offers a unique opportunity for an amphibious drilling project. The east–west (EW)-striking, left lateral strike-slip Oriente–Septentrional fault zone and Enriquillo–Plantain Garden fault zone bounding Haiti have similar slip rates and also define the ...
Chastity Aiken +10 more
openaire +6 more sources
Selection of a Suitable Rheological Model for Drilling Fluid Using Applied Numerical Methods
Energies, 2020 The accuracy of fitting the rheological model to the properties of actual drilling fluid minimises the errors of the calculated technological parameters applied while drilling oil wells.
R. Wiśniowski +2 more
semanticscholar +1 more source