| 摘要 |
A WELLBORE SYSTEM COMPRISING A BOREHOLE (1) EXTENDING INTO AN EARTH FORMATION (3), A TUBULAR ELEMENT (11) EXTENDING INTO THE BOREHOLE (1) WHEREBY A CYLINDRICAL WALL SURROUNDS THE TUBULAR ELEMENT (11) IN A MANNER THAT AN ANNULAR SPACE (26) IS FORMED BETWEEN THE TUBULAR ELEMENT (11) AND THE CYLINDRICAL WALL, AT LEAST ONE SEAL MEMBER (16, 18, 20, 22, 24) ARRANGED IN SAID ANNULAR SPACE (26), EACH SEAL MEMBER (16, 18, 20, 22, 24) BEING MOVABLE BETWEEN A RETRACTED MODE IN WHICH THE SEAL MEMBER (16, 18,20,22, 24)HAS A FIRST VOLUME AND AN EXPANDED MODE IN WHICH THE SEAL MEMBER (16, 18,20,22, 24)HAS A SECOND VOLUME LARGER THAN THE FIRST VOLUME, WHEREIN THE SEAL MEMBER (16, 18, 20, 22, 24)IN THE EXPANDED MODE THEREOF SEALS THE ANNULAR SPACE (26), AND WHEREIN THE SEAL MEMBER (16, 18,20,22,24) INCLUDES A MATERIAL WHICH SWELLS UPON CONTACT WITH A SELECTED FLUID SO AS TO MOVE THE SEAL MEMBER (16, 18,20,22,24) FROM THE RETRACTED MODE TO THE EXPANDED MODE THEREOF. (FIGURE 1 ).
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