| 摘要 |
The present invention relates to a device for controlling and isolating a tool for isolating areas in a well which comprises: a main inlet conduit which communicates with the inside of said casing, and which is obturated by a first element able to form a barrier to a fluid circulating in said casing, while yielding beyond a first pressure, this conduit communicating, with two auxiliary conduits, the ends of which join up in order to form an outlet conduit, one of these auxiliary conduits, forming a first chamber, while, in the other one, a second element is provided forming a barrier, moveable between a first position and a second position wherein said first position, said second element forming a barrier and the wall of said second auxiliary conduit make between them a sealed annular chamber in which prevails a so-called <<isolation>> pressure, this chamber not communicating with the outside, notably with the well. |
