Results 51 to 60 of about 126,181 (293)

An Eco-Friendly Fluid Loss Control Additive for Water-Based Bentonite Drilling Fluid: Orange Peel Waste

Chemical Engineering Transactions, 2023
Drilling fluid performs a crucial function in petroleum drilling operations. This functional fluid improves the performance of the drilling process by controlling bottom hole pressure, wellbore stability, and cleaning the hole.
Nam Nguyen Hai Le, Dinh Phuoc Hau, Ly Trung Hieu, Hoang Trong Quang, Tran Nguyen Thien Tam, Tran Trung Dung, Do Quang Khanh   +6 more
doaj   +1 more source

Experimental research into the effect of some operation factors and rock properties on the rate of penetration [PDF]

, 2020
Purpose. The purpose of this research is to investigate the effect of weight on bit (WOB), rotary speed (RPM), and some rock properties on the rate of penetration (ROP). Methods.
Ali, Mahrous A.M., Boghdady, Gamal Y., Mohamed, Ahmed S., Sayed, Mohamed A., Yassien, Mohamed A.   +4 more
core   +1 more source

Microporous Microgel Assemblies Facilitating the Recruitment and Osteogenic Differentiation of Progenitor Cells for Bone Regeneration

Advanced Functional Materials, EarlyView.
There is a significant need for biomaterials with well‐defined stability and bioactivity to support tissue regeneration. In this study, we developed a tunable microgel platform that enables the decoupling of stiffness from porosity, thereby promoting bone regeneration.
Silvia Pravato, Haishuo Guan, Bianca M. Carrara, Mira Jacobs, Matteo Monticelli, Lukas Moser, Thomas Moragues, Andrew J. deMello, Tomaso Zambelli, Martin Ehrbar   +9 more
wiley   +1 more source

Lost Circulation Prediction Based on Long Short-Term Memory Network and Random Forest Algorithm

Zuanjingye yu wanjingye
Lost circulation is one of the key factors restricting drilling safety and efficiency. To realize accurate prediction of lost circulation, a hybrid model for the prediction of lost circulation is presented based on long short-term memory (LSTM) and ...
Aiting CAI, Junlin SU, Kun DAI, Han ZHAO, Jiayi WANG   +4 more
doaj   +1 more source

Influence of Platform Motion to Pressure Fluctuation of Downhole Drilling Fluid

Shiyou jixie, 2022
Riserless drilling technology controls the liquid level of drilling fluid in the rotary blowout preventer by controlling the rotating speed and flow rate of the seabed drilling fluid lift pump,so as to control the wellbore pressure.In view of the ...
Wang Chuan, Liu Jing, Liu Chao, Wang Guorong, Fang Haihui, Zheng Yuyan   +5 more
doaj  

Improved diamond coring bits developed for dry and chip-flush drilling [PDF]

, 1971
Two rotary diamond bit designs, one operating with a chip-flushing fluid, the second including auger section to remove drilled chips, enhance usefulness of tool for exploratory and industrial core-drilling of hard, abrasive mineral deposits and ...
Decker, W. E., Hampe, W. R., Hampton, W. H., Simon, A. B.   +3 more
core   +1 more source

Supraparticles Composed of Graphitic Carbon Nitride Nanoparticles and Silica‐Supported Horseradish Peroxidase as Customizable Hybrid Catalysts for Photo‐Biocatalytic Cascade Reactions in Continuous Flow

Advanced Functional Materials, EarlyView.
Herein presented supraparticles combine the nanoparticulate photocatalyst graphitic carbon nitride with the enzyme horseradish peroxidase, which is immobilized on silica nanoparticles. In an optimized compatibility range, both catalysts operate effectively within the hybrid supraparticles and catalyze a cascade reaction consisting of the photocatalytic
Bettina Herbig, Egzon Cermjani, Doris Hanselmann, Johannes Prieschl, Angelika Schmitt, Michael S. Moritz, Christian Papp, Greta Nölke, Stefano Di Fiore, Christoph Deckers, Thomas H. Rehm, Susanne Wintzheimer   +11 more
wiley   +1 more source

Low-Density High-Fluidity High-Strength Epoxy Resin Cement Slurry Technology for Wellbore Reconstruction

Zuanjingye yu wanjingye
The production rate of a shale gas well generally declines fast, resulting in a low average recovery of the well. Refracturing of an old well with shale gas production pressure depletion can effectively enhance the ultimate recovery of the well, and ...
Xin JIN, Lei CHEN, Qian TAO, Shiming ZHOU, Chunqin TAN   +4 more
doaj   +1 more source

Lithium Intercalation in the Anisotropic Van Der Waals Semiconductor CrSBr

Advanced Functional Materials, EarlyView.
We report the lithium intercalation in the layered van der Waals crystal CrSBr, revealing strongly anisotropic ion‐migration dynamics. Optical and electrical characterization of exfoliated CrSBr shows lithium diffusion coefficients that differ by more than an order of magnitude along a‐ and b‐directions, consistent with molecular dynamics simulations ...
Kseniia Mosina, Aljoscha Söll, Jiří Šturala, Martin Veselý, Petr Levinsky, Ondřej Kaman, Florian Dirnberger, Giuliana Materzanini, Nicola Marzari, Gian‐Marco Rignanese, Borna Radatović, Vlastimil Mazánek, David Sedmidubský, Zdeněk Sofer   +13 more
wiley   +1 more source

Analysis of Components of Gas Well Blocking Substances and Study on a Composite Block Removing System

Zuanjingye yu wanjingye
Gas wells drilled in the Gaoshiti block of the Southern Sichuan Gas District have encountered serious formation blocking problem, resulting in significant decline in the gas production.
Yu HE, Tianbao HE, Tianyou FAN, Qiang YANG, Binghong XIE, Yang WU   +5 more
doaj   +1 more source