| 摘要 |
The invention relates to drilling and well operations, in particular to the design of devices for opening of productive layers by means of slot perforation. Accelerates the formation of perforated slots, increasing reliability and security of the perforator, improving its operational performance. Cutting unit of slot-type perforator, performed in the perforator's casing, driven by the pusher, for example, piston or plunger, containing telescoping cutting tools with the mechanism of their extension in the form of holders, one of which is fixed relative to the pusher and the other - is fixed with respect to the perforator's casing, and the holders are performed with possibility of rotating together with extension of the cutting tools from perforator's casing. According to the invention, the cutting tool extension mechanism additionally comprises a balance beam, which has cutting tools mounted in the arms, assembled in the casing between the holders with the possibility of rotation at contact with them, and the geometrical axis of rotation of the beam is adapted to move relative to the longitudinal axis of the casing, such as the groove in the casing. The embodiment of the invention which includes balance beams sequentially mounted between the holders in the amount of two or more pieces. The cutting unit can be equipped with a retractable mechanism to bring telescoping parts into the transport position and fix them in position. |
