Results 31 to 40 of about 34,329 (209)
Borehole stability in densely welded tuffs [PDF]
, 1992 The stability of boreholes, or more generally of underground openings (i.e. including shafts, ramps, drifts, tunnels, etc.) at locations where seals or plugs are to be placed is an important consideration in seal design for a repository (Juhlin and Sandstedt, 1989).
Fuenkajorn, K., Daemen, J. J. K.
openaire +2 more sources
137CS gamma-ray detection at Summit, Greenland [PDF]
, 1994 Global fall-out from atmospheric testing of thermonuclear weapons produced horizon markers corresponding to the initiation of testing in 1953 and the maximum fall-out in 1963.
Dibb, Jack E., Dunphy, P. P.
core +2 more sources
Petroleum Exploration and Development, 2015 When the conventional method of predicting borehole stability is applied to the preliminary prospecting wells, the precision of prediction is often affected severely by the lack of data, limit of applying conditions, error of calculated parameters and ...
Chao WU +4 more
doaj +1 more source
, 2019 Earthquakes induced during hydraulic fracturing operations have occurred in a number of locales. However, in-situ studies aimed to discern the triggering mechanism remains exclusively statistical in their nature.
Schmitt, Douglas R. +2 more
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Journal of Rock Mechanics and Geotechnical EngineeringBorehole instability in naturally fractured rocks poses significant challenges to drilling. Drilling mud invades the surrounding formations through natural fractures under the difference between the wellbore pressure (Pw) and pore pressure (Pp) during ...
Yaoran Wei +6 more
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ABOUT USING THE GEOPHYSICAL STUDY METHODS TO PREVENT DRILLING PROBLEMS
Известия высших учебных заведений: Нефть и газ, 2016 The methods of geophysical survey used for prevention of complications in terms of stability of well borehole when drilling are considered. It is shown that application of the borehole survey complex, including section gage logging, borehole acoustic TV (
L. A. Parshukova, A. V. Deryabin
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International Journal of Mining Science and Technology, 2020 Using self-researched gas drainage borehole stability dynamic monitoring device, three-dimensional deformation characteristics of borehole under steady vertical load were researched experimentally and systematically.
Hongbao Zhao +5 more
doaj +1 more source
Geofluids, 2023 With the thermo-hydro-mechanical coupling process considered, this paper derives a set of analytical porothermoelastic solutions to field variables including the stress, displacement, and pore pressure fields to evaluate the wellbore stability around a ...
Hai Lin +3 more
doaj +1 more source
Characterization of Shale-Drilling Fluid Interaction Mechanisms Related to Wellbore Instability
Journal of King Saud University: Engineering Sciences, 1996 Wellbore stability problems tend to occur during the drilling phase in shale sections, hence the understanding of shale-drilling fluid interaction mechanisms is essential if wellbore instability is to be avoided when drilling through shale sections.
Musaed N.J. Al-Awad, B.G.D. Smart
doaj +1 more source
Improvment of safety conditions of unstable rock slopes through the use of explosives [PDF]
, 2008 The paper discusses operations aimed at creating a safer natural or man made rock slope by artificially inducing the displacement of unstable elements by blasting.
Casale, M. +2 more
core +3 more sources