Results 1 to 10 of about 17,724 (148)
Meitan kexue jishu, 2023 Aiming at the problems such as large deformation difference of coal structure, strong heterogeneity of physical properties, complex coal structure during horizontal drilling, single completion & stimulation technology and so on, a completion technology ...
Yansen BI +3 more
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Horizontal well workover technology present situation and development trend [PDF]
E3S Web of Conferences, 2021 In the downhole operation of horizontal Wells, the pipe string is subjected to the combined action of many kinds of loads. The pipe string may bend sinusoidal or spiral under the action of axial compressive stress, which will also increase the friction ...
Zhang Guohui +5 more
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Petroleum Exploration and Development, 2022 Focusing on the extending length restriction of the completion screen pipe resistance running into ultra-short radius horizontal well, this paper proposed technology of hydraulic drive completion tubular string running into ultra-short radius horizontal ...
Yansen BI +3 more
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The Complete Cohomology of the W3 String [PDF]
Classical and Quantum Gravity, 1995 18 pages, CTP TAMU-50 ...
Lu, H. +3 more
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Witten genus and string complete intersections [PDF]
Pacific Journal of Mathematics, 2008 In this note, we prove that the Witten genus of nonsingular string complete intersections in product of complex projective spaces vanishes. Our result generalizes a known result of Landweber and Stong (cf. [HBJ]).
Chen, Q., Han, F.
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China Geology, 2023 To meet the requirements of marine natural gas hydrate exploitation, it is necessary to improve the penetration of completion sand control string in the large curvature borehole.
Hao-xian Shi +14 more
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UV completions for non-critical strings [PDF]
Journal of High Energy Physics, 2016 v4: 102 pages, 2 figures, clarifications ...
Apruzzi F +3 more
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The complete spectrum of the WN string [PDF]
Nuclear Physics B, 1992 28 ...
Lu, H. +3 more
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A COMPLETE ACTION FOR THE SPINNING STRING [PDF]
Physics Letters B, 1976 Abstract We present an action for the Neveu-Schwarz-Ramond model from which follow both the field equations and the gauge and supergauge constraints. This is done by coupling the free-field action to two-dimensional supergravity in a geometrically clear way.
S. Deser, B. Zumino
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TOWARDS A COMPLETE TWISTORIZATION OF THE HETEROTIC STRING [PDF]
Modern Physics Letters A, 1994 In D = 3, 4, 6 and 10 space-time dimensions considered is a string model invariant under transformations of N = 1 space-time supersymmetry and n = D − 2 local worldsheet supersymmetry with both the Virasoro constraints solved in the twistor form. The twistor solution survives in a modified form even in the presence of the heterotic fermions.
Bandos, Igor A. +3 more
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