发明名称 |
Method and apparatus for adding a tubular to drill string with diverter |
摘要 |
Apparatus and a method for adding and removing tubulars whilst containing the pressure within a drill string and/or maintaining circulation of drilling fluid down a drill string using a diverter sub which is able to open up to mud flow from a side mud port and close off the flow of mud from above the drill string with or without continuous rotation of the drill string.
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申请公布号 |
US7726418(B2) |
申请公布日期 |
2010.06.01 |
申请号 |
US20060576893 |
申请日期 |
2006.04.24 |
申请人 |
COUPLER DEVELOPMENT LIMITED |
发明人 |
AYLING LAURENCE JOHN |
分类号 |
E21B21/10;E21B19/16;E21B21/00;E21B33/068;E21B33/08;E21B34/00 |
主分类号 |
E21B21/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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