公开(公告)号：EP3196402A1

公开(公告)日：2017-07-26

申请号：EP16152418.6

申请日：2016-01-22

申请人： Shell Internationale Research Maatschappij B.V.

发明人： SCHOENMAKERS, Jules Marcus Marie

IPC分类号： E21B27/02 ,  E21B33/12 ,  E21B29/02

CPC分类号： E21B27/02 ,  E21B29/02 ,  E21B33/1204

摘要： A to-be-abandoned underground wellbore(4) is plugged along any desired longitudinal interval and radial extent by:
- dropping capsules (2) filled with a grout, pyrotechnic, swelling, bismuth, clay, bentonite, (thermo)hardening, sintering, and/or other plug generating material(3) into the wellbore (4) at selected time intervals;
- inducing the capsules (2) to accumulate above a downhole cement or other barrier (5) in the wellbore (4);
- inducing the accumulated capsules (2) to disintegrate and to release the plug generating material (3) into the wellbore (4); and
- inducing the released plug generating material to generate a fluid tight barrier (7) of a desired length and radial extent within the wellbore (4).

摘要翻译： 将要弃置的地下井筒（4）沿任何所需的纵向间隔和径向范围通过以下方式堵塞： - 填充有灌浆，烟火，膨胀，铋，粘土，膨润土，（热）硬化的滴下胶囊（2），烧结 和/或其它的塞生成材料（3）以选定的时间间隔进入井筒（4）中; - 诱导胶囊（2）积聚在井眼（4）中的井下水泥或其它屏障（5）上方; - 诱导积聚的胶囊（2）分解并将栓塞生成材料（3）释放到井眼（4）中; 和 - 诱导释放的塞子生成材料在井眼（4）内产生具有期望长度和径向范围的流体密封屏障（7）。