| 摘要 |
<p>The present invention relates to a downhole system for performing an operation in a well downhole. The system comprises an elongated tubing string (3) for conducting fluid in the well; a turbine (7) driven by the fluid for driving a shaft (8); a generator (9) driven by the turbine by means of the shaft, a fluid-driven driving section (5) comprising a pump (6) driven by the fluid supplied through the shaft for propelling the fluid-driven driving section and the tubing string forward in the well, and an electrically driven driving section (10) comprising an electrical motor(ll) powered by the generator (9) for propelling the driving section and the tubing string forward in the well, wherein the fluid-driven driving section (5) is arranged between the generator (9) and the electrically driven driving section (10).</p> |
