发明名称 |
Systeem voor het afdichten van de intersectie tussen een primair boorgat en een boorgatvertakking. |
摘要 |
A system for sealing the intersection between a primary borehole and a branch borehole comprises a primary casing section which in use is located in the primary borehole in the region of the branchpoint and a branch casing section which is secured to the primary casing section and is located in the branch borehole. The primary casing section (9) is a tubular which defines a slant surface (11) which intersects a central axis of the tubular at an acute angle, so that the primary casing section can be pressed towards the branchpoint by means of a hollow whipstock (6) or other wedge-shaped element. <IMAGE> |
申请公布号 |
NL1010919(A1) |
申请公布日期 |
1999.07.01 |
申请号 |
NL19981010919 |
申请日期 |
1998.12.30 |
申请人 |
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V. |
发明人 |
FRANCIS ALEXANDER CUMMING;SIMON LAWRENCE FISHER;WILHELMUS CHRISTIANUS MARIA LOHBECK |
分类号 |
E21B7/06;E21B7/08;E21B41/00;E21B43/10 |
主分类号 |
E21B7/06 |
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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