| 摘要 |
<p>The present invention relates to a tool (1) for filling, circulating and backflowing fluids in a pipeline being run into or out of a wellbore, the tool (1) including an elongate, telescopically acting body (2), a sealing element (14) arranged for sealing between the tool (1) and the pipeline (6) when the tool is being run into the pipeline, and a valve means (19) arranged for being closed when the tool is being pulled out of the pipeline (6), the tool (1) further being provided with a through channel. The invention is characterized in that the elongate, telescopically acting body (2) comprises a running head (3) at the lower end thereof, the valve means (19) being installed in the running head (3) and including a hydraulically actuatable ball valve adapted for being operable to an open position when running head (3) is run into the upper end of the pipeline (6), the hydraulic actuatable ball valve being adapted for closing when the running head (3) is pulled out of the pipeline (6), one or more sensors (9), adapted for measuring how far into the pipeline (6) the running head (3) is located, being positioned along the elongate, telescopically acting body (2).</p> |
