发明名称 |
Cementing and washout method and device for a well. |
摘要 |
<p>An annulus cementing and washout technique and equipment, particularly for use in an offshore oil or gas well. An annulus is formed between an outer casing and a second-outer casing, this annulus being filled with cement up to a predetermined level and washed free of cement above sai DOLLAR level. The second-outer casing is fitted with a washout casing section having washports at the predetermined level. The washports are selectively opened and closed by axially moving a hollow sleeve mounted in the washout casing section, preferably by turning the sleeve on a screw thread using a remotely operated tool. Details of a suitable tool include spring-loaded radial dogs which engage axial slots within the sleeve. Use of the sleeve and the tool to move the sleeve enables the washports to be opened and closed as required without troublesome rotation or support of the casing.</p> |
申请公布号 |
EP0272080(A2) |
申请公布日期 |
1988.06.22 |
申请号 |
EP19870311009 |
申请日期 |
1987.12.15 |
申请人 |
PLEXUS OCEAN SYSTEMS LIMITED |
发明人 |
VAN BILDERBEEK, BERNARD HERMAN;MILNE, IAN FRASER |
分类号 |
E21B33/043;E21B33/14 |
主分类号 |
E21B33/043 |
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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