发明名称 |
METHOD AND APPARATUS FOR SEALING AN UNDESIRABLE FORMATION ZONE IN THE WALL OF A WELLBORE |
摘要 |
A method and apparatus are provided for intentionally inducing “formation plugging” in a partially damaged section, water layer, or an otherwise undesirable target zone in the wall of a wellbore. The rigless apparatus is deployed to the target zone by coiled tubing and includes a pair of adjacent inflatable packers or a multi-section inflatable thermoplastic balloon component which is in valved fluid communication with an inflating container filled with formation plugging fluid. The inflating container is in valved fluid communication with a reactant-filled chemical container, the reactant being activated by contact with reactant fluid pumped through the coiled tubing via a circulation valve. The hot pressurized exothermic reaction products pass into the inflation container and displace the formation plugging fluid into the balloon sections and through weakened portions of a central balloon to penetrate the walls of the target zone. The expanded central balloon is melted by the heat of the chemical reaction and a portion adheres to the formation wall thereby sealing the undesirable target zone; thereafter, the remaining balloon sections are deflated or ruptured to permit the apparatus to be withdrawn through the production tubing. |
申请公布号 |
EP3119981(A2) |
申请公布日期 |
2017.01.25 |
申请号 |
EP20150715556 |
申请日期 |
2015.03.20 |
申请人 |
Saudi Arabian Oil Company |
发明人 |
AL-GOUHI, Waleed, Abdullah |
分类号 |
E21B33/12;E21B33/127;E21B33/138 |
主分类号 |
E21B33/12 |
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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