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bit
相关语句
  钻头
    The Study on Wear Regularity, Design and Performance Test of Diamond Bit and Diamond Saw
    金刚石钻头和金刚石锯片磨损机理、设计及性能测试研究
短句来源
    STUDY OF THE LOAD ON THE JOURNAL BEARINGS OF THE TRICONE BIT BY THE METHOD OF ANALYSIS OF THE RANDOM PROCESS
    用随机过程分析方法研究牙轮钻头轴承载荷
短句来源
    Calculation for Vertical Milling Teeth of Bit Cones
    钻头牙轮直铣齿的计算
短句来源
    How to Determine and Calculate Bit Bearing Load
    钻头轴承载荷的测试与计算
短句来源
    STUDY ON BELLEVILLE RING SEAL OF ROLLER BIT
    牙轮钻头碟形圈密封的试验研究
短句来源
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  “bit”译为未确定词的双语例句
    METHODS OF PREDICTING BIT TRAJECTORY AND THEIR APPLICATIONS IN DIRECTIONAL DRILLING
    定向井井眼轨道预测方法研究及其应用
短句来源
    Discussion on Non-Pressure Liquid Infiltration Theory for Diamond Bit Making
    无压浸渍法液相渗透理论的探讨
短句来源
    Research of product defining system for bit cone
    牙轮零件产品定义系统的研究
短句来源
    CONTROL PRINCIPLE ANALYSIS OF BIT TRAJECTORY CONTROL SYSTEMS
    井眼轨道控制系统控制原理分析
短句来源
    Global LPG supplies are expanding rapidly, with growth from 2006 to 2012 expected to exceed 46 million tons, at a bit faster rate than global LPG demand.
    全球LPG供应正在快速增长,预计2006-2012年全球LPG增量将超过4600万吨,而世界LPG需求的增长略低于供应的增长。
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  bit
Experimental results show that the proposed approach can reduce the computational cost of full search and fast multi-block motion estimation by 80 % and 45 %, respectively, with similar visual quality and bit rate.
      
The proposed algorithm also reduces by 75 % the computational cost of the large-small mode isolation algorithm for low-motion sequence coding, and with 0.06 PSNR gain and 3.7 % reduction in bit rate.
      
In underwater acoustic communication, because the available bandwidth of the channel is severely limited, the direct-sequence spread-spectrum scheme can only be realized at low bit rates.
      
The bit error performance is correlative not only with the interference-signal ratio (ISR), the frequency offset and the phase of the CW interference sensitively, but also with the individual spread spectrum code sequence.
      
DCT_M model for excitation parameter in low bit rate vocoder
      
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The characteristic features of an experimental bit are related. The experimental bit is the main equipment used in studying the forces to which the journal bearings of the tricone bit are subjected. The experimental bit is designed according to the basic parameters of XHP215ZY-3 type bit produced by the Chengdu Petroleum General Machinery-Building Plant of The Sichuan Petroleum Industry Administration.Through experiments a set of curves are recorded. The radial and axial loads on...

The characteristic features of an experimental bit are related. The experimental bit is the main equipment used in studying the forces to which the journal bearings of the tricone bit are subjected. The experimental bit is designed according to the basic parameters of XHP215ZY-3 type bit produced by the Chengdu Petroleum General Machinery-Building Plant of The Sichuan Petroleum Industry Administration.Through experiments a set of curves are recorded. The radial and axial loads on the big and small journal bearings of each cone are obtained, and the load distribution percentages on the cones and bearings are calculated. The result of data processing has proved the design of the experimental bit to be successful and the recorded curves of load variations with time to be reliable. Meantime, the experiments concerning the influence of vertical relative positions of cones on their bearing loads are described. At the end of this paper, several opinions on the present design of this type of bit are pat forward.

本文叙述了我室研究三牙轮滑动轴承钻头,其轴承受力分析时所用到的“试验钻头”的特点,该试验钻头是按四川石油局成都石油总机厂生产的XHP 215zy—3型钻头基本参数设计并制造的、通过试验,获得了一组记录曲线,经整理并计算出了各牙轮轴大小滑动轴承的径向和轴向负荷,以及各牙轮的载荷分配百分比。数据处理结果说明试验钻头设计是成功的,各种载荷随时间而变化的记录曲线是可靠的。同时还开展了人为地变化牙轮高度对轴承受力影响的试验,最后提出了我们对该型钻头现有设计中几点讨论意见。

The bench test of three-cone bits and analysis of their bottom hole patterns are the simplest and useful means of checking and improving their design. These means have been used for a long time abroad, but they are used in our country for the first time now.In present paper we have introduced in great detail the measured parameters and the bottom hole patterns of the Sichuan-made threecone bits, such as 8 1/2″ XHP4-1、川, M—9X types, when we used them to penetrate granite, limestone and Sandstone. In addition,...

The bench test of three-cone bits and analysis of their bottom hole patterns are the simplest and useful means of checking and improving their design. These means have been used for a long time abroad, but they are used in our country for the first time now.In present paper we have introduced in great detail the measured parameters and the bottom hole patterns of the Sichuan-made threecone bits, such as 8 1/2″ XHP4-1、川, M—9X types, when we used them to penetrate granite, limestone and Sandstone. In addition, we have compared all these results with those we obtained, using bits of 8 1/2″ J44、J55R、F3、 HP51、J77、types, which are made in U.S.A.Besides, in this paper we have presented several photos of bottom hole patterns and various drilling parameters. Through theoretical analysis of them, we have come to some conclusions about the rational teeth arrangement and usage, which may be useful for improving bit design and its usage.

三牙轮钻头地面台架试验与井底模式的分析是对牙轮钻头设计的合理性进行检验与改进的最简便又较真实的方法。在国外早已采用,国内尚属首次。 本论文详细的介绍了成都石油总机厂制造的8 1/2″XHP 4-1与川_1M—9X型三牙轮钻头在花岗岩、石灰岩与砂岩中钻进时各种参数的测量数据与所钻出的井底模式,并与美国8 1/2″J44,J55R、F3、HP51及J77型三牙轮钻头进行对比研究。 文中有各种井底模式的照片与测得的各种钻进参数值,并对它们进行了理论分析,提出了如何改进8 1/2″XHP4-1型钻头齿面布置及合理使用构改进意见,为我国改进钻头设计及使用提供参考。

This paper discusses the optimum methods for calculating and determining va- rious hydraulic parameters and mud rheologic parameters in jet drilling. The Sp-hydraulic optimization slide rule can bc used in calculating and deter- mining the proper relationship of hydraulic parameters and mud rheologic parame- ters.It includes: Side 1 (1)rheology of drilling mud,such as n,k_2,θ_0θ_(300),θ_(600), etc. (2)critical velocity and“Z” value, (3)rheological model_3——modified power law or power law, (4)lifting capacity,...

This paper discusses the optimum methods for calculating and determining va- rious hydraulic parameters and mud rheologic parameters in jet drilling. The Sp-hydraulic optimization slide rule can bc used in calculating and deter- mining the proper relationship of hydraulic parameters and mud rheologic parame- ters.It includes: Side 1 (1)rheology of drilling mud,such as n,k_2,θ_0θ_(300),θ_(600), etc. (2)critical velocity and“Z” value, (3)rheological model_3——modified power law or power law, (4)lifting capacity, (5)pressure losses in laminar flow, Side 2 (6)pressure losses in turbulent flow, (7)bit hydraulic optimization

本文介绍了在喷射钻井中计算和确定各种钻井水力参数和泥桨流变参数相互适应的优选方法。其中包括:泥桨流变性、临界流速和“z”值、流变模式、净化能力、层流压耗、紊流压耗、钻头水力参数优选等。

 
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