| 摘要 |
<p>The present invention relates to a downhole system (200) comprising a casing (3) having an inner wall. Furthermore, the downhole system comprises a wireless unit (1) which is movable within the casing, comprising driving means (7) in the form of wheels and at least one battery pack (8) comprising at least one battery for powering an electrical motor (5) driving a pump (6) driving the wheels to rotate along the inner wall of the casing, wherein the downhole system further comprises a well head (110) having a sound detection device (16) for detecting vibrations in the casing, e.g. caused by the driving means or an operation perfomed by the wireless unit.</p> |
