发明名称 |
Method for removing filtercake |
摘要 |
A method for removing filtercake from a subterranean borehole comprising drilling the borehole with a drilling fluid that includes additives to form a filtercake having an oxidation-degradable component, preferably a polymer. The filtercake is contacted with a precursor that forms an oxidizing agent at downhole temperatures to degrade the polymers within the filtercake. Alternatively one or more catalysts for activating the precursor of an oxidizing agent is embedded within the filtercake. The catalyst activates the precursor as the precursor is flushed over the filtercake and remains in contact with the filtercake to form an oxidizing agent to degrade the oxidation-degradable agent and decompose the filtercake. The remaining particles of decomposed filtercake are then flushed away.
|
申请公布号 |
US6131661(A) |
申请公布日期 |
2000.10.17 |
申请号 |
US19980127842 |
申请日期 |
1998.08.03 |
申请人 |
TETRA TECHNOLOGIES INC. |
发明人 |
CONNER, RICHARD PAUL;MURPHEY, JOSEPH ROBERT |
分类号 |
C09K8/08;C09K8/52;C09K8/60;(IPC1-7):E21B37/00 |
主分类号 |
C09K8/08 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|