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Annals of Pure and Applied Logic, 2021 We systematically study the completion of choice problems in the Weihrauch lattice. Choice problems play a pivotal role in Weihrauch complexity. For one, they can be used as landmarks that characterize important equivalences classes in the Weihrauch lattice.
Vasco Brattka, Guido Gherardi
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On the completeness of complete markets [PDF]
Economic Theory, 2005 The authors consider three market structures. Model of Arrow-Debreu, model of sequentially complete markets and model of complete markets are analyzed. Multi-period economies subject to uncertainty, where markets may reopen at future stats are investigated. Distinction between naive and sophisticated behavior of markets are given.
Herings P. Jean-Jacques +1 more
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Formation Pore Pressure Prediction and Application Based on Aacoustic Logging
Cejing jishu, 2023 Formation pore pressure prediction is an important factor in the study of wellbore stability. Accurate prediction of pore pressure can avoid safety problems, such as overflow and blowout, thereby improving drilling efficiency, reducing environmental ...
QI Wenli +4 more
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Energy Exploration & Exploitation, 2023 ROP (Rate of Penetration) is a comprehensive indicator of the rock drilling process and how efficiently predicting drilling rates is important to optimize resource allocation, reduce drilling costs and manage drilling hazards.
Wei Liu +4 more
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Improving Thermal Stability of Starch in Formate Fluids for Drilling High Temperature Shales [PDF]
Journal of Petroleum Science and Technology, 2012 Starch is one of the most widely used biopolymers in water based drilling fluids to control fluid loss. The thermal stability of starch in common drilling fluids is low (93 °C).
M. Valizadeh, ali reza nasire
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The Effect of Additive ZRJ-S1 on Mechanical Properties of Portland Cement
Advances in Materials Science and Engineering, 2022 For mechanical performance perfection of cement-based material, toughening materials are often added to the cement system, such as solid particles, carbon-based material, or other inorganic/organic materials.
Xin Zeng +6 more
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Cutting mechanism of a special 3D concave-shaped PDC cutter applicable to the Weiyuan shale
Journal of Petroleum Exploration and Production Technology, 2023 The Weiyuan shale gas field faces problems of long drilling cycles and high development costs. Improving the drilling efficiency of polycrystalline diamond compact bits in shale formations will significantly reduce the overall well cost and duration ...
Xiaohua Ke +5 more
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Frontiers in Earth Science, 2023 The existence of gravels in the glutenite formations leads to the complex geometries of hydraulic fracturing propagation and difficult construction in fracturing engineering. To study the hydraulic fracturing propagation law of glutenite formations, this
Peng Tan +19 more
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Completion of the Causal Completability Problem [PDF]
The British Journal for the Philosophy of Science, 2015 We give a few results concerning the notions of causal completability and causal closedness of classical probability spaces (Hofer-Szabo, Redei & Szabo [1999], Gyenis & Redei [2004]). Answering a question from Hofer-Szabo et al. [1999], we prove that any classical probability space has a causally closed extension. We also employ the notion of causal up-
Wroński, Leszek, Marczyk, Michał
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NOVEL ACID SOLUBLE ABRASIVE MATERIAL FOR ABRASIVE JET PERFORATION THROUGH COILED TUBING AND TS-TOOL FOR CARBONATE GAS WELL – YARD TEST [PDF]
Romanian Journal of Petroleum & Gas Technology, 2023 Coiled tubing is used in oil and gas well production with the aim of increasing oil field production. The efficiency of this process is reproduced in this material, with practical applications in carbonate rocks, also presenting the conditions of ...
Alaa Zeinab +3 more
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