| 摘要 |
<p>The present invention relates to a wireless downhole unit (1) adapted to be lowered into a well (2) in a casing (3) having an inner wall (4) and an inner diameter (D C ). The wireless downhole unit comprises an electrical motor (5), a pump (6), and driving means (7) for allowing movement of the wireless downhole unit within the casing, and at least one battery pack (8).</p> |
