Results 111 to 120 of about 235,371 (297)

Acoustical properties of drill strings [PDF]

, 1988
The recovery of petrochemical and geothermal resources requires extensive drilling of wells to increasingly greater depths. Real-time collection and telemetry of data about the drilling process while it occurs thousands of feet below the surface is an effective way of improving the efficiency of drilling operations.
openaire   +2 more sources

The Myth of Decarbonized Oil: Technological Fixes, Climate Delay, and the Politics of Low‐Carbon Fossil Fuels

Sustainable Development, EarlyView.
ABSTRACT The idea of “decarbonized oil” has become increasingly visible in climate, energy, and corporate transition debates as oil and gas actors seek to reconcile continued fossil fuel production with net‐zero commitments. This article offers a critical narrative review of the concept, asking what political work the idea of decarbonized oil performs ...
Jacob Kwakye
wiley   +1 more source

Research on Vibration Reduction and ROP Acceleration for Drilling in KOA Oilfield,Kazakhstan

Shiyou jixie, 2023
The KOA oilfield is located in the eastern margin of the Caspian Basin,Kazakhstan.The shallower Upper Permian of the oilfield is found with severe interbeding between sandstone and mudstone as well as interlayers of mudstone/slate and conglomerate.The ...
Wang Jianning, Zhou Yingcao, Zhao Jichen, Geng Jianhua, Qiao Jianfeng   +4 more
doaj  

New Zealand String Quartet & Martin Rummel in Vienna

, 2019
Repertoire: Schubert: String Quartet, D ...
Rummel, Martin
core  

Innovative 3D‐bioprinted microfibers in calcium phosphate cement platform with Nell‐1 to activate nerve‐bone axis for synergistic bone, vasculature, and nanofibrous nerve regeneration

Smart Molecules, EarlyView.
A 3D‐bioprinted platform with stem cells activates “nerve‐bone” signaling by enabling the spatiotemporal delivery of Nell‐1. This activation enhances neurovascular and bone regeneration through the CYFIP1 cascade. In rat calvarial defects, the platform doubled bone regeneration and nerve repair and tripled vascular density, resulting in superior ...
Minjia Zhu, Xinyi Li, Jingyi Li, Kan Yu, Zixiang Dai, Le Xiao, Qinrou Zhang, Zihan Jia, Qingchen Qiao, Zeqing Zhao, Ke Zhang, Yuxing Bai   +11 more
wiley   +1 more source

Western String Chamber Orchestra, November 25, 1991

, 2016
Recorded during a live performance at Dalton Center Recital Hall, Western Michigan University, Kalamazoo, Michigan, November 25, 1991, 8:00 p.m., the 142nd concert of the School of Music’s 1991-1992 season.Western String Chamber Orchestra, Bruce Uchimura,
Western String Chamber Orchestra
core   +1 more source

Toward the Application of Multiaxial Failure Criteria: Mean Stress Sensitivity of Carbide‐Rich, High‐Alloy PM‐HIP Tool Steels Under Axial and Torsional Cyclic Loading

steel research international, EarlyView.
This study quantifies axial and torsional long‐life fatigue (LLF) behavior of three carbide‐rich PM‐HIP tool steels, correlating LLF strength with intrinsic defect size and cleanliness, thereby extracting material‐specific mean stress sensitivities and Haigh diagrams.
Lennart Mirko Scholl, Frederik Tegeder, Tobias Hajeck, Alexander Bezold, Christoph Broeckmann   +4 more
wiley   +1 more source

Dynamic Characteristics of Horizontal Drilling with Flexible Drill String Based on ABAQUS Explicit Dynamics

Shiyou jixie
During the drilling of ultrashort-radius radial horizontal well with flexible drill string， the vertical shift of wellbore trajectory affects the encountering rate of target points.
Liu Xin Huang Zhongwei Wu Xiaoguang Li Gensheng Shi Huaizhong Wang Jiarui Wang Minghao, Huang Zhongwei, Wu Xiaoguang, Li Gensheng, Shi Huaizhong, Wang Jiarui, Wang Minghao   +6 more
doaj   +3 more sources

Influences of Cleanliness, Carbide Size, Hardness, and Residual Stresses on Long‐Life Fatigue Strength and Crack‐Initiation Mechanisms in Carbide‐Rich Cold‐Work Tool Steels Using Normalized S–N Curves and Database‐Driven Validation of Murakami's √Area Model

steel research international, EarlyView.
Rotating‐bending fatigue tests on AISI D2 and AISI A11 quantify how cleanliness, carbide structure, hardness, and fabrication‐induced compressive residual stresses govern long‐life fatigue at NG = 107 cycles. Statistical fracture‐surface analysis and extreme‐value √area statistics link crack‐initiators to LLF strength.
Lennart Mirko Scholl, Frederik Tegeder, Dhirendar Chauhan, Bengt Hallstedt, Tobias Hajeck, Alexander Bezold, Christoph Broeckmann   +6 more
wiley   +1 more source

Reaming While Drilling Drillstring Structure Optimization and Application Performance Evaluation

Shiyou jixie, 2016
The reaming tool BHA is the most important controllable factor during reaming while drilling operations,whereas the irrational drill string structure could lead to intensified drill string vibration.In view of this,the drill string-formation finite ...
Zhang Qiang, Fu Jianhong, Li Haoran
doaj