Results 21 to 30 of about 12,164 (264)

Analysis of PDC cutter cutting‐broken conglomerate based on the discrete element method

Energy Science & Engineering, 2022
It is well known that the magnitude of impact load is one main reason for polycrystalline diamond compact (PDC) cutter failure rapidly when drilling conglomerate formation. However, there are many factors affecting the magnitude of impact load. To assess
Xiaoao Liu, Deyong Zou, Yahui Chen, Yong Huang, Qing Wang   +4 more
doaj   +1 more source

Study on factors affecting the petro physical properties of sandstone and conglomerate reservoirs of Baikouquan Formation, Junggar Basin

Frontiers in Earth Science, 2023
In recent years, oil and gas exploration of the Baikouquan Formation in the northwestern margin of the Junggar Basin has seen major breakthroughs have been made in oil and gas exploration.
Hao Kuang, Hao Kuang, Hao Liu, Hao Liu, Xianfeng Tan, Xianfeng Tan, Jingwei Yu, Haiqiang Song, Runchi Zhou, Runchi Zhou, Junmin Wang, Junmin Wang, Fei Liu   +12 more
doaj   +1 more source

Experimental study on optimization of PDC cutting teeth for conglomerate layer

Jin'gangshi yu moliao moju gongcheng, 2023
In order to obtain better drilling effect in the conglomerate layer, it is necessary to optimize the tooth shape and caster angle of PDC bit for the conglomerate layer. Single tooth rock breaking experiments are conducted on ordinary plane teeth, conical
Shuting CHENG, Hongbo WANG, Hui JI, Maosheng CAI, Sai LI   +4 more
doaj   +1 more source

Crystal Engineering of Conglomerates: Dilution of Racemate-Forming Fe(II) and Ni(II) Congeners into Conglomerate-Forming [Zn(bpy)₃](PF₆)₂

Chemistry, 2023
Conglomerate formation, where enantiomers within a racemic mixture self-segregate upon crystallization, is an advantageous property for obtaining chirally pure crystals and allows large-scale chiral resolution. However, the prevalence of conglomerates is
Ugo Serdan, Lucas Robin, Mathieu Marchivie, Mathieu Gonidec, Patrick Rosa, Elen Duverger-Nédellec, Emilie Pouget, Philippe Sainctavit, Marie-Anne Arrio, Amélie Juhin, Andrei Rogalev, Fabrice Wilhelm, Elizabeth A. Hillard   +12 more
doaj   +1 more source

Groundwater resources in a fractured-rock aquifer, Conglomerate of Portofino

Journal of Maps, 2021
Hydrogeological mapping is a key tool for groundwater resource management. Generally, hydrogeological maps focus mainly on porous or karst aquifer at large scale. In a fractured-rock aquifer, the groundwater flow path is not immediately deductible due to
M. Terrone, G. Paliaga, N. Bazzurro, A. Marchese, F. Faccini   +4 more
doaj   +1 more source

Experimental Study on Conglomerate Breaking Characteristics of Conical PDC Cutter

Shiyou jixie, 2021
In order to further improve the rock breaking efficiency and the adaptability of drilling hard and complex strata of PDC bit, a comprehensive test device of rock breaking by PDC cutter was developed. The test device was used to conduct experimental study
Xu Weiqiang, Shi Huaizhong, Cao Quan, Shi Xingxing, Hu Xihui, Xiong Chao, Chen Han   +6 more
doaj  

Research on Mechanical Properties and Failure Mode of Conglomerate Based on Discrete Element Method

Applied Sciences, 2022
Conglomerate reservoir is an important part of unconventional oil and gas resources, which has great developmental potential. However, its sedimentary environment and structural background are complex, and its cementation types, gravel volume fraction ...
Jiawei Zhang, Xiangjun Liu, Jian Xiong, Lixi Liang, Wen Zhang   +4 more
doaj   +1 more source

On Negative Conglomerability

Journal of Statistical Theory and Practice
AbstractWe focus on the notion of negative conglomerability. This is far less known than its counterpart, conglomerability. Both relate to the combination of conditional and unconditional information, with the latter taking in particular a foundational role in the special case of infinite partitions of the possibility space.
Enrique Miranda, Marco Zaffalon
openaire   +3 more sources

Bailout and conglomeration

Journal of Financial Economics, 1999
The paper suggests that when firms differ stochastically in their productivity, a bank may find it optimal not to bail out the failed nonconglomerate firms at all, but to bail out conglomerates fully. Expectation of such bailout policy may encourage risk-averse firms to join a conglomerate to minimize the risk of liquidation.
openaire   +2 more sources

Interconnectedness of Financial Conglomerates [PDF]

Risks, 2015
Being active in both the insurance sector and the banking sector, financial conglomerates intrinsically increase the interconnections between the banking sector and the insurance sector. We address two main concerns about financial conglomerates using a unique database on bilateral exposures between 21 French financial institutions.
Gaël Hauton, Jean-Cyprien Héam
openaire   +4 more sources