Results 51 to 60 of about 2,300 (225)
FRACTOGRAPHIC ANALYSIS OF PDC CUTTER FAILURE MECHANISMS
IZVESTIA VOLGOGRAD STATE TECHNICAL UNIVERSITYThe paper presents the results of a study of the physical mechanisms of operational damage and failure of polycrystalline diamond layers in PDC cutters (Polycrystalline Diamond Compact), which are the cutting elements of diamond and matrix drill bits. For this purpose, fractographic analysis of the fracture surfaces of the diamond layer in PDC cutters ...
V.A. KOLIBASOV +5 more
openaire +1 more source
Advanced Science, EarlyView.CXCR4 functions as a potential cancer stem cell‐associated marker linked to chemoresistance in ovarian cancer, and an inhibitor of CXCR4, AMD3100, can enhance the cytotoxic response to cisplatin. Based on these findings, [68Ga]Ga‐Pentixafor positron emission tomography enables selective visualization of CXCR4‐high ovarian cancer, while AMD3100 combined
Lixia Feng +12 more
wiley +1 more source
Cutting Test Device for PDC Bit with Mixed Cutter Arrangement
Shiyou jixie, 2019 The existing PDC bit single-cutter test device is very inconvenient to adjust the parameters such as single-cutter rake angle. It is necessary to carry out frequent replacement of multiple sets of tools, which is not suitable for the mixed cutting ...
Liu Zhong +3 more
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Аналіз мультиколінеарності критеріїв оптимальності процесу буріння нафтових і газових свердловин долотами типу PDC [PDF]
, 2010 Розглядається вплив функції зносу озброєння доліт типу PDC на проходку долота, механічну швидкість проходки, рейсову швидкість і собівартість метра проходки нафтових і газових свердловин.
Гутак, О.В.
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Failure analysis and optimum structure design of PDC cutter
Mechanics, 2017 The PDC (Polycrystalline Diamond Compact) cutter is widely prevailed in the markets of measuring and cutting tools, down-hole tools of oil and gas drilling, mining and geothermal drilling industries. However, PDC cutters failure results in reduced bit life and low efficiency rock breaking thereby limiting the popularity and application of drilling ...
Chunyan Kong, Zheng Liang, Derong Zhang
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Advanced Electronic Materials, EarlyView.This study introduces a thin‐film‐type heat‐generating device that uses laser induced graphene (LIG) on a poly(D, L‐lactic) acid film, which realizes both resistance heating by direct current application and photothermal conversion heating by near‐infrared light irradiation.
Masato Saito +4 more
wiley +1 more source
Cutting of Siliceous Dolomite by Special-Shaped PDC Cutter under Confining Pressure
Shiyou jixieThe dolomite formation is an important field for oil and gas exploration in the future. However， due to the high confining pressure environment in wellbore and the hard-to-drill characteristics of dolomite， traditional planar cutter PDC bit is prone to ...
Tian Wanqing +5 more
doaj +1 more source
Applied Sciences, 2019 The low rock breaking efficiency of conventional polycrystalline diamond compact (PDC) bits in hard abrasive formations prompts the development of PDC cutting elements from the planar structure to the non-planar structure.
Jianxun Liu +4 more
doaj +1 more source
Gel‐Amin for Improving Extracellular Recordings of Cardiomyocytes in a 3D Microphysiological System
Advanced Electronic Materials, EarlyView.This work combines a conductive collagen‐based hydrogel with a laser‐cut and assembly technique to fabricate microphysiological systems that improve extracellular recordings of cardiomyocytes in 3D on microelectrode arrays. The inclusion of choline acrylate into GelMA imparts a higher electrical conductivity and improves the signal‐to‐noise ratio of on‐
Dominic Pizzarella +4 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 +4 more
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