专利详细信息

一种深水表层钻井井下环空压力自动控制系统及控制方法

文献类型：专利

专利类型：发明专利

是否失效：否

是否授权：否

申请号：CN201210311578.X

申请日：20120829

发明人：殷志明李嗣贵雷宗明胡文金李迅科朱荣东孔松涛汤毅田波罗洪斌艾传志田峥

申请人：中国海洋石油总公司中海油研究总院重庆科技学院

申请人地址：100010 北京市东城区朝阳门北大街25号

公开日：20150114

公开号：CN102797451B

代理人：徐宁;关畅

代理机构：11245 北京纪凯知识产权代理有限公司

语　　种：中文

摘　　要：本发明涉及一种深水表层钻井井下环空压力自动控制系统及控制方法，其系统包括重浆池、海水池和处理剂池中的三个管线，每一管线连接混合器的输入端，混合器的输出端连接出流管线，出流管线连接海底井下PWD的短节。每一管线中设置动力泵、调节阀和入口流量计，出流管线中设置出口流量计。井下PWD连接MWD，MWD的信号接收装置通信连接远程计算机控制系统，远程计算机控制系统通过数据总线连接录井系统和PLC控制系统，PLC控制系统数据连接调节阀、入口流量计、混合器和出口流量计。本发明通过远程计算机控制系统和PLC控制系统构建二级微机控制系统实现重浆和海水混合比例自动调节，配置所需密度和流量的钻井泥浆输入井下，进行井底压力平衡调节，实现安全钻进。

主权项：1.一种深水表层钻井井下环空压力自动控制系统的控制方法，其特征在于：所述深水表层钻井井下环空压力自动控制系统包括重浆池、海水池、处理剂池、混合器、设置有随钻测量装置的随钻压力测量系统、设置在海面上的所述随钻测量装置的信号接收装置、设置有井下环空压力分析模型的远程计算机控制系统、录井系统和设置有三流体流量计算模型的可编程逻辑控制系统；所述重浆池、海水池和处理剂池中分别设置有一第一管线，每一所述第一管线上设置有一动力泵、一调节阀和一入口流量计，每一所述第一管线的末端连接所述混合器的输入端，所述混合器的输出端通过一出流管线连接所述随钻压力测量系统的短节，所述出流管线上设置有出口流量计；所述随钻压力测量系统的随钻测量装置的信号接收装置通信连接所述远程计算机控制系统，所述远程计算机控制系统通过数据总线连接所述录井系统和所述可编程逻辑控制系统；所述可编程逻辑控制系统接收各所述入口流量计和出口流量计采集的密度和流量测量值并发送给所述远程计算机控制系统；所述远程计算机控制系统中的井下环空压力分析模型根据所述可编程逻辑控制系统接收的密度和流量测量值、所述录井系统采集的钻进井深数据和所述随钻压力测量系统采集的井下环空压力测量值，通过分析计算得出井下所需钻井泥浆的密度期望值和流量期望值，传给所述可编程逻辑控制系统，经所述可编程逻辑控制系统中的三流体流量计算模型计算出每一所述第一管线中的流量期望值，并发出相应的阀位控制信号给所述第一管线的调节阀；所述可编程逻辑控制系统中的三流体流量计算模型为： $<math> <mrow> <msub> <mi>Q</mi> <mi>z</mi> </msub> </p><p class='subject'><strong>关键词：</strong>混合器井下远程计算机控制连接 <b class='type_ico_id'></b>流量计出口流量计调节阀系统及控制方法 <b class='type_ico_id'></b>微机控制系统信号接收装置压力自动控制表层钻井 <b class='type_ico_id'></b>井底压力平衡调节数据连接数据总线通信连接 <b class='type_ico_id'></b>钻井泥浆处理剂动力泵输出端输入端短节 <b class='type_ico_id'></b>录井钻进水池海底海水 </p><p class='class'><strong>IPC专利分类号：</strong>E21B44/00(20060101)</p>
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