Device for a fluid operated valve body and method for operation of the valve body

摘要

A device is described for a fluid operated valve body 200 for activation of a fluid operated tool, said valve body 200 is connected to a pipe section 11 of a pipe 160 arranged in a well 120 in a formation 140, and the device is characterized in that the valve comprises a plunger piston 5 in a channel 232, which plunger piston 5 is reset from a closed to an open position to let fluid into the tool, said resetting takes place with a piston 210, said piston 210 is brought to a number of stepwise forwards and backwards movements by increasing and decreasing, respectively, the fluid pressure P2, and said movements affect a slide body 14 which is moved stepwise, in one direction, to a position where it opens for balls 8 to fall out of channel 232, thereby releasing the plunger piston 5 to move and open for fluid flow P to the fluid operated tool. The piston 210 is an extended body the one end of which is exposed to the pipe fluid, while the other end 212 is held pre-stressed by a pre-stressing body 15, where the slide movement takes place when the piston 210 moves as a consequence of said pressure release, and the pre-stressing body 15 is arranged in a chamber that is in open fluid connection with the well outside the pipe section, and the piston 210 is hydraulically balanced. The piston 210 affects the slide body 4 by teeth 239 on the slide body 4 and lifting arm 10 on the piston 210. A method for operation of the valve body is also described.

主权项

1. Device for a fluid operated valve body for activation of a fluid operated tool, said valve body can be connected to a pipe section of a pipe arranged in a well in a formation characterised in that said valve body comprises
a release body having one end exposed to a fluid pressure in the pipe and an opposite end disposed in a chamber in the pipe section in open fluid connection with the well outside the pipe section, said release body being a piston which is placed in a boring through a wall of said valve body; a pre-stressing body in said chamber biasing said release body towards said one end against the fluid pressure in the pipe to balance said release body hydraulically whereby said release body is movable in number of stepwise forward and backward movements by increasing and decreasing, respectively, the fluid pressure in the pipe; a slide body movable in response to movements of said release body; and characterised in that said piston comprises a rotary blocking hook for engaging with said slide body during the movement of said piston upwards for each increase in the fluid pressure in the pipe.