heavy duty hydraulic disconnect allows coiled tubing downhole tool string to disconnect tools by dropping a ball under certain conditions. The release/connection mechanism of heavy-duty hydraulic disconnect adopts the design of enveloping block, which makes it have the characteristics of high strength, impact resistance and fatigue load compared with other designs. Arc-shaped fitting anti-torque tooth design makes heavy duty hydraulic release high anti-torque, which is very suitable for heavy duty coiled tubing drilling and milling operations.

Heavy duty hydraulic release piston pressure self-balance, only be disconnected after drop a ball and increase pressure to shear pins, the release pressure can be adjusted by changing the number of shear pins installed. In addition, the heavy duty hydraulic release of the large diameter through the replacement of different diameter/seat piston, thereby changing the size of the ball. For example, in some operations, the hydraulic release is connected to the lower end of the jar and accelerator in order to retrieve as many tool strings as possible after the release of the hydraulic release. Due to the limitation of jar/accelerator inner diameter, the ball size is small. By changing piston with different inner diameter, hydraulic pressure disconnect of the same specification can meet different operation requirements.

Standard "GS" internal fishing neck is left after heavy duty hydraulic disconnect released which is fit standard "GS" fishing spear for fishing operation.