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- drilling fluid pulse signal 钻井液脉冲信号
- At pres ent,drilling fluid pulse is mainly used to transmit signals between ground and d ownhole in wireless information system. 目前，地面与井下的无线信息传输系统主要是采用钻井液脉冲方式。
- Considering drilling fluid component that includes gas,liquid and solid,the formula of the velocity of dri lling fluid pulse is developed in this paper. 文中考虑气、液、固三相的钻井液组分，提出了钻井液脉冲传输速度的计算公式。
- At present,drilling fluid pulse is widely used by most of wireless MWD systems,and how to improve the transimission depth and rate is a theme of research for this kind of systems. 目前,大多数的无线随钻测量系统都采用钻井液脉冲的传输方式,而如何提高传输深度和传输速率一直都是钻井液脉冲传输系统的研究主题。
- Analysis of Signal Attenuation for Positive Drilling Fluid Pulse 钻井液正脉冲信号的衰减分析
- Study on the transmission velocity distribution of drilling fluid pulse 钻井液脉冲传输速度的分布规律研究
- Multiphase simulation technique of drilling fluid pulse transmission along well bore 钻井液脉冲沿井筒传输的多相流模拟技术
- Keywords hole trajectory;MWD;closed loop drilling;drilling fluid pulse;drilling theory;mathematical model.; 井眼轨迹;随钻测量;闭环钻井;钻井液脉冲;钻井理论;数学模型;
- drilling fluid pulse 钻井液脉冲
- Methyl silicone oil polysulfonate drilling fluid. 产。甲基硅油聚磺高密度钻井液。
- BZ 34-2EP-P1S drilling fluid technology. BZ34-2EP-P1S井钻井液技术
- The drilling fluid is described by Casson fluid. 采用卡森流体描述钻井液。
- In the course of transmission, mud pulse signal mainly disturbed by drilling pump,engine in the bottom hole, air bladder contained in mud and movement of drilling equipment. 泥浆脉冲信号在传输过程中主要受钻探泵、井底动力机、泥浆中的气泡及活动钻具的干扰;
- Mud pulse MWD can not be used when too much gas or air in drilling fluid, and therefore electro-magnetic telemetry has speedily developed as an alternative. 钻井液气体较多时泥浆脉冲方法也难以应用，而电磁波随钻遥测技术作为一种替代技术近年来发展很快。
- A novel filtration reducing agent NJ-1 for drilling fluid. 新型降滤失剂NJ-1的研究与应用
- Inhibiting effect mechanism of biopolymer MEG drilling fluid. 生物聚合物甲基葡萄糖甙钻井液抑制机理
- After equilibrium and regeneration, the current pulse signal reverts to standard digital pulse signal. 经过均衡和再生后,转变成标准的数字脉冲信号。
- Drilling Fluid Technology of Well QATIF-894 in Saudi Arabia. 沙特阿拉伯QATIF-894井钻井液工艺技术
- Due care must be taken to ensure that the pulse signal itself shall allow no irregularities and no interruptions. 应注意保证脉冲信号本身不出现不规则现象和中断现象。必要的反译变通可使译文简练、明了。
- The numerical calculation result shows that the viscosity and air voids of drilling fluid have notable influences on the transmission of DPSK signal. 数值计算表明，钻井液黏度和含气率对信号传输的影响最大。
