Results 61 to 70 of about 14,166 (227)

Development of PDC Bit with Axe-shaped Teeth and its Application in East China Sea

Shiyou jixie, 2021
The PDC bits used in many wells in the East China Sea had low ROP and small footage in the process of drilling deep formation. After the bits were pulled out, it was found that the cutting teeth had been worn severely.
Li Qian, Liu Xiaobo, Zhang Haishan, Li Jiwei, Huang Zhao, Zhang Jing   +5 more
doaj  

Efficient scheme for three-photon Greenberger-Horne-Zeilinger state generation

, 2012
We propose an efficient scheme for the generation of three-photon Greenberger-Horne-Zeilinger (GHZ) state with linear optics and postselection. Several devices are designed and a two-mode quantum nondemolition (QND) detection is introduced to obtain the ...
Barrett, Bennett, Bennett, Bennett, Bennett, Bennett, Boschi, Bouwmeester, Briegel, Cleve, Deng, Deng, Deng, Deutsch, Dong Ding, Dür, Einstein, Ekert, Feng-Li Yan, Gao, Gao, Greenberger, He, Horodecki, Howell, Imoto, Kok, Kok, Kwiat, Li, Lin, Lin, Long, Milburn, Murao, Nemoto, Nogues, Schmidt, Sheng, Sheng, Sheng, Sheng, Sheng, Shimizu, Simon, Wang, Wittmann, Yan, Yan, Yan   +49 more
core   +1 more source

MXene 3D‐AJP: Three‐Dimensional Well‐Oriented Freeform Networks of 2D MXene Nanosheets via Aerosol‐Based 3D Printing

Small, EarlyView.
This study presents an additive‐free aerosol jet 3D printing technique for assembling 2D MXene nanosheets into complex, customizable, high‐aspect‐ratio 3D microarchitectures without binders. By leveraging real‐time ink thickening, the authors also fabricate 3D microsupercapacitors with interdigitated electrodes that holds breakthrough device areal ...
Chunshan Hu, Bin Yuan, Sanjida Jahan, Md. Azahar Ali, Rahul Panat   +4 more
wiley   +1 more source

Conglomerate Rock Breaking Technology with New PDC Cutter and Its Application

Shiyou jixie, 2019
In oil and gas drilling, PDC bit has become an indispensable downhole tool for rock breaking. However, conglomerate formation is still the restricted area for PDC bit. At present, most of conglomerate formations are drilled using roller cone bit.
Zhu Xiaolin, Yang Can, Zhang Ou, Wang Hong, Qi Changli, Cheng Dong   +5 more
doaj  

PDC cutter pressure on plastic-brittle rock in the process of its destruction

Записки Горного института, 2020
Presently, there are no methods for calculating the parameters of the drilling practices with rock-cutting tools equipped with polycrystalline diamond composite (PDC cutters). To create such a method requires the studying their work. The article presents
Oleg B. Trushkin, Hamzja I. Akchurin
doaj   +1 more source

Microfluidic Intracytoplasmic Sperm Injection (MICSI): A Novel Platform for Sperm Isolation, Selection, and Injection Into Oocytes

Andrology, EarlyView.
ABSTRACT Background Infertility is a pressing global health concern, affecting one in six couples worldwide. The failure rate for assisted reproductive technologies (ART) cycles remains at approximately 78%, with limited improvements often attributed to a lack of technological innovation.
Mehran Dabiri, Dale Mark Goss, Steven Alexander Vasilescu, Majid Ebrahimi Warkiani   +3 more
wiley   +1 more source

Optimization of Hydraulic Structure of Rotary Cutting PDC Bit

Shiyou jixie, 2020
Few researches have been conducted on the hydraulic structure optimization design of rotary cutting PDC bit. Standard k-ε model and discrete phase model (DPM) are used to simulate the bottom hole flow field of rotary cutting PDC bit and optimize the ...
Cao Yang, Zhang Boyu
doaj  

Identification of 2‐Substituted‐3‐Hydroxy‐2,3‐Dihydroquinazolin‐4(1H) Ones as Cell‐Active Inhibitors of KDM4A Lysine Demethylase

ChemMedChem, Volume 21, Issue 10, 27 May 2026.
A novel 3‐hydroxy‐2,3‐dihydroquinazolinone scaffold is identified as a cell‐active KDM4A inhibitor through an orthogonal screening cascade minimizing assay interference. Integrated biochemical, biophysical, and proteomic validation reveals compound 6i as a bona fide binder that increases H3K9 methylation in cells, highlighting both a promising ...
Alessandra Feoli, Amodio Luca Balzano, Ida Pacilio, Alessandra Cipriano, Roman Belle, Giacomo Pepe, Manuela Giovanna Basilicata, Pietro Campiglia, Fabrizio Micheli, Akane Kawamura, Ciro Milite, Sabrina Castellano, Axel Imhof, Gianluca Sbardella   +13 more
wiley   +1 more source

New Bit with Rolling PDC Cutter

Shiyou jixie, 2016
The new rolling PDC cutter drill bit technology could effectively address the fixed cutter eccentric wear issue,prolong durability,improve ROP,resulting in improved drilling efficiency and reduced drilling costs,which is a great step of drill bit ...
Shi Jiangang, Wu Xingyong, Dang Wenhui, Deng Ping, Liu Gang   +4 more
doaj  

Numerical Simulation of the Flow Field of the PDC Bit Supporting the Pulse Jet Based ROP Improvement Tool

Shiyou jixie, 2020
In order to give full play to the performance of the ROP improvement tool based on pulsed downhole alternating flow field, this paper studied its support PDC bit by means of numerical simulation.
Fan Jiqiang, Wang Guanjun, Wang Shengliang, Shi Huaizhong, Hou Xinxu, Li Shuowen   +5 more
doaj