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Downhole circulating cooling device

Downhole circulating cooling device 2024-01-24

关键词:: circulation; cooling device; high temperature environment; Downhole tools

This paper presents a kind of downhole circulating cooling device in high temperature environment. The device consists of the following components: compresso...

作者:: Gao Xu,Zhou Jing Xie Haiming Shang Haiyan
文件大小:: 486.3 KiB

Reflected Sound Field Characteristics of Impulse Source in Open-hole Well during Deep Detection based on microscope technology

Reflected Sound Field Charact... 2024-01-24

关键词:: Sound Wave Depth Detection; Impulse Sound Source; Open-hole Well; Geological Interface; Microscopic Techniques

This study which applies sound wave depth detection technology, useing the simulation method which establish the calculation model of geological interface de...

作者:: Jing Zhou Xu Gao Xie Haiming
文件大小:: 1.2 MiB

Energy accumulation characteristics of pulse sound source and the exploration of borehole wall fracture under microscope

Energy accumulation character... 2024-01-24

关键词:: Energy Accumulation; Sound Source Frequency; Borehole Diameter; Borehole-side Fracture; Microscope Technology

Pulse source is a new kind of high-power, high bandwidth, controllable and repeatable strong sound source. The sound source has a broad application prospect ...

作者:: Haiyan Shang,Zhenyu Wang,Bingnan Yan
文件大小:: 486.0 KiB

Mechanical strength analysis of sound insulator of grooves for deep detection of downhole impulse sound source

Mechanical strength analysis ... 2024-01-24

关键词:: impulse; drill collar waves; deep

In downhole impulse sound source deep detection logging, the sound insulator is interposed between the impulse sound source transmitter and receiver to suppr...

作者:: Haiyan Shang,Wenhao He,Lu Zhang
文件大小:: 1.6 MiB

Study on characteristics of 1–3 piezoelectric composite transducer for underground impulse sound source

Study on characteristics of 1... 2024-01-24

关键词:: characteristics; piezoelectric; impulse

Oil exploration has now developed in the direction of low permeability, low porosity and low reserve abundance, and the target of exploration has to turn to ...

作者:: Jing Zhou,Xiang Chen,Libo Zheng
文件大小:: 1.7 MiB

Analysis of Impulse Wave Characteristics of Underwater Plasma

Analysis of Impulse Wave Char... 2024-01-24

关键词:: plasma impulse; hydroelectric effect; Characteristics

The plasma impulse sound source based on the “hydroelectric effect” has great application value in petroleum geological exploration and oilfield plugging rem...

作者:: Jing Zhou,Danhong Li,Zhe Hui,Libo Zheng
文件大小:: 1.8 MiB

特种螺杆钻具关键组件有限元仿真分析

特种螺杆钻具关键组件有限元仿真分析 2024-01-24

关键词:: 特种螺杆钻具; 万向轴组件; 传动轴组件; 仿真分析

万向轴和传动轴组件是特种螺杆钻具中的两个关键组件，要承受大扭矩、高转速，受力7 环境复杂，结合特种螺杆钻具井下工作参数，建立有限元力学计算模型，基于Ansysworkbench8 软件确定了单元类型、材料属性和约束条件等参数，计算得出万向轴和传动轴组件应力、应变9 及变形大小，根据计算结果进行材料优化，从而提高万...

作者:: 何新振,底青云,杜建生,杨永友,刘庆波,谢棋军
文件大小:: 671.1 KiB

Parameter analysis affecting the characteristics of sound insulation of gradient U-shaped groove structure

Parameter analysis affecting ... 2024-01-24

关键词:: Parameter analysis; characteristics; gradient U-shaped groove structure

There are drill collar mode waves propagating directly along the drill collar during logging while drilling, drill collar waves will seriously interfere with...

作者:: Jing Zhou,Lu Zhang,Wenhao He,Libo Zheng
文件大小:: 1.7 MiB

Study on the structure parameters of transmitting transducer for drilling acoustic logging technology

Study on the structure parame... 2024-01-24

关键词:: Acoustic; excite; source signal

Acoustic logging is an effective measurement tool for detecting formation information and obtaining geological parameters, which is widely used in the petrol...

作者:: Jing Zhou,Libo Zheng,Xiang Chen
文件大小:: 1.6 MiB

井下非接触电能传输耦合器仿真与优化

井下非接触电能传输耦合器仿真与优化 2024-01-24

关键词:: 旋转导向系统; 松耦合变压器; 电能传输; 磁芯; 间隙

旋转导向钻井是一项尖端的自动化钻井技术，提升旋转导向工具中两个相对转动件之间能量传输装置的可靠性是其核心和关键．为解决传统接触式滑环方法安装不便、旋转时易失效、易受钻井液及泥浆等液体腐蚀、可靠性不高等缺点，国内外学者相继提出非接触电能传输方式．为分析非接触电能传输方式的，本文建立非接触电能传输系统模型，对非接触电...

作者:: 张辉,刘庆波,底青云,杨永友,谢棋军
文件大小:: 1.7 MiB

Actuator fault estimation design for DC motor using unknown input observer

Actuator fault estimation des... 2024-01-24

关键词:: 未知输入观测器（UIO）; 故障估计; 直流电机; 线性矩阵不等式（LMI）

This study investigates the problem of robust fault estimation for direct current (DC) motor control systems subjected to actuator faults and unknown input d...

作者:: Shen-Hua Wu,Sheng-Xuan Yang,Lei Xiao,Min-Hui Wu
文件大小:: 1.4 MiB

Simulation research on vibration parameters model of drill string

Simulation research on vibrat... 2024-01-24

关键词:: Acoustic transmission; Telemetry while drilling; Vibration parameters model Modeling analysis

The study of transmission characteristics of drill string is the key to complete acoustic teletransmission while drilling In this paper, by analyzing the inf...

作者:: Haiming Xie,Jing Zhou,Peifen Zhang
文件大小:: 1.2 MiB

Main Frequency Band and the Reflected Sound Field in the Depth Detection of Borehole Wall Based on Microscope Technology

Main Frequency Band and the R... 2024-01-24

关键词:: Plasma Impulse Sound Source While Drilling; Acoustic Depth Detection; Reflected Sound Field; Microscopic Techniques.

The traditional microscope technology has the limitation of short detection distance. In order to solve this problem, a reflective near-field optical microsc...

作者:: Jing Zhou Lijuan Wang Jie Niu
文件大小:: 733.4 KiB

Study on Characteristics of Needle-Ring Electrode for Deep Detection of Impulse Sound Source

Study on Characteristics of N... 2024-01-24

关键词:: plasma; develop; numerical

The plasma impulse sound source is developing rapidly and has been applied to many fields such as wastewater treatment and oilfield exploration, and the elec...

作者:: Jing Zhou,Zhe Hui,Danhong Li
文件大小:: 1.9 MiB

旋转导向系统中非接触电能与信号一体化传输技术

旋转导向系统中非接触电能与信号一体化传输技术 2024-01-24

关键词:: 旋转导向系统; 非接触一体化传输; 信号调制与解调

旋转导向系统可有效提高钻井速度、安全性和井眼轨迹控制精度,是油气行业尤其是复杂环境下油气勘探开发的核心设备之一.非接触电能和信号传输单元是旋转导向系统中将电能和信号从旋转主轴传输至非旋转外套的重要单元.为了保证高温下大负载时电压输出的稳定性以及信号同步传输的可靠性,本文提出一种载波调制式电能与信号一体化的传输方法...

作者:: 谢棋军,底青云,杨永友,刘庆波,张辉,马良令
文件大小:: 2.7 MiB

储能电容充电电压对激波特性的影响分析

储能电容充电电压对激波特性的影响分析 2024-01-24

关键词:: 冲激波特性充电电压冲激波强度能量转化效率

利用“液电效应”产生的等离子体冲激声源在岩石破碎、地质导向、确定位置等方向有巨大的应用价值，目前关于等离子体放电回路中充电电压与放电特性、冲激波特性的关联性仍缺乏进一步深入了解。基于水下等离子体放电实验平台，建立水下等离子体冲激声源的仿真模型，对比分析冲激声源放电典型的电压、电流及冲激波波形的实测和仿真结果，通过...

作者:: 周静李丹红尚海燕惠喆
文件大小:: 1.3 MiB

Intelligent Fault-diagnosis System for Acoustic Logging Tool Based on Multi-technology Fusion

Intelligent Fault-diagnosis S... 2024-01-24

关键词:: fault diagnosis; embedded technology; acoustic logging; transducer array; data-driven technique; fault tree analysis

To improve the performance of acoustic logging tool in detecting three-dimensional formation, larger and more complicated transducer arrays have been used, w...

作者:: Xiaolong Hao,Xiaodong Ju,Junqiang Lu,Baiyong Men and Jing Zhou
文件大小:: 2.9 MiB

Investigation on the Application of Parabolic

Investigation on the Applicat... 2024-01-24

关键词:: Remote-exploration logging; Plasma source; Directional radiation; Parabolic reflection

Transmitter source is a significant part of a remote-exploration acoustic logging tool. Its power and directional-radiation characteristics are key factors t...

作者:: Hao Xiaolong,Zhou Jing,Wang Zhenyu,Zhang Yifang
文件大小:: 669.7 KiB

Deep Detection Acoustic Reflection of Borehole side While Drilling Based on Impulse Source with Microscope Technique

Deep Detection Acoustic Refle... 2024-01-24

关键词:: impulse source; acoustic deep detection; reflected wave logging; source frequency; measurement while drilling

Single-well acoustic wave deep detection has developed rapidly and has become one of the most popular technologies. It has potential application value in the...

作者:: Zhou Jing,Xiong Liu,Fu Hao
文件大小:: 738.0 KiB

Seasonal variation characteristics of geomagnetic Sq external and internal equivalent current systems in EastAsia and Oceania regions

Seasonal variation characteri... 2024-01-24

关键词:: spherical harmonic analysis; vortex intensity; Geomagnetic data

Geomagnetic data from 20 observatories in East-Asia and Oceania regions were used to investigate the seasonal variation characteristics of the external and i...

作者:: Liu,X.,Han,P.,Hattori,K.,Chen,H.,Yoshino,C.,Zhao,X.,et al.
文件大小:: 4.6 MiB