发明名称 |
MEANS AND METHOD FOR THE PREPARATION OF SEALINGS IN OIL AND GAS WELLS |
摘要 |
Agent and method for establishing different types of zone sealings particularly in oil wells and gas wells, wherein the zone to be sealed is supplied with a composition comprising: monomers, an initiator for heat-induced production of free radicals, a pot life extending inhibitor for stabilization of free radicals, and optionally other additives. The composition is subjected to radical polymerization induced by heat in the well zone and at a temperature of 5-120 DEG C, and establishes a cured mass, particularly at temperatures in the range of 65-100 DEG C. The composition is supplied with an at least partly unsaturated prepolymer selected from the group consisting of polyester and epoxy vinylester, including one or more vinyl-containing co-monomers selected from the group consisting of styrene, vinyltoluene, 2-hydroxyethyl-methacrylate and 2-hydroxypropyl-methacrylate. The prepolymer is present in a quantity of 15-75 weight parts and the vinyl-containing co-monomers are added in a quantity of 75-15 weight parts. The composition is particularly suited for low temperature applications.
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申请公布号 |
WO9715746(A1) |
申请公布日期 |
1997.05.01 |
申请号 |
WO1996NO00255 |
申请日期 |
1996.10.25 |
申请人 |
WECEM A/S;DAHL-JOERGENSEN, EINAR;OEYE, BJARTE, ARNE |
发明人 |
DAHL-JOERGENSEN, EINAR;OEYE, BJARTE, ARNE |
分类号 |
C08F283/00;C08F290/06;C09K8/508;(IPC1-7):E21B33/13 |
主分类号 |
C08F283/00 |
代理机构 |
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主权项 |
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地址 |
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