底部钻具振动特性分析及信息传输实验

振动问题一直是引起底部钻具失效的主要原因,对其进行研究能减小钻具损害和各类井下事故的发生。设计了振动测量系统,测量了底部钻具组合(BHA)在井底受到的各类作用力下的振动特性并分析了其规律,利用钻柱的振动特性传输井下信息。BHA振动实验是在分析井下钻柱受到的作用力的基础上,通过对某组合的钻柱施加3种典型的井下作用力进行实验,利用设计的振动测量系统检测并分析数据,得到BHA的部分振动规律;信息传输实验是以钻柱为媒介、振动波为载体,在激励端施加信号、接收端分析钻柱传递的信号的初步试验。把钻井作业中几种常见行为引起的振动进行了分类实验,定性分析了各种作用引起的振动特征。该研究是国内对底部钻具各类振动及利用振动传输信息的全面研究。

Vibration characteristic analysis and information transmission test of bottom drilling tool

Research on vibration problems which is the main reason causing bottom drilling tool failure,can reduce drilling tool damage and emergence of underground accidents.Vibration measurement system is designed,vibration characteristics and its law of BHA at well bottom subjected to interactive forces is measured and analyzed respectively,and underground information is transferred in terms of vibration characteristics of drilling string.BHA vibration experiment,based on analysis of forces born by drilling string at bottom hole,is done by imposing 3 typical underground forces on certain combination drilling string.And part vibration law of BHA is gained by detection and data analysis of vibration measurement system designed.Information transmission test,regarding drill string as media while vibration wave as carrier,is a primary experiment by imposing signal at excitation end and receiving that transferred by analysis of drill string immediately responding to wind.Classified experiment,which is overall for various vibrations of bottom tool and information transmission in terms of various vibrations at home,is done for vibration caused by several common behaviors in drilling operation,and accordingly vibration characteristics caused by various functions are analyzed qualitatively.