It’s a kind of downhole tool used in oil field for plugging and cement squeezing. It is mainly composed of a setting unit, anchoring unit and the sealing unit. With a unique self-lock structure, it has reliable two-way bearing function. Reliable sealing can be realized without covered the cement. Retrievable bridge plug is delivered to suitable place by hydraulic tools or cable to realize sealing, can be retrievable after unsealing. It can be reused after replacing wearing parts. It can be used together with other downhole tools, for temporary plugging, selective plugging and so on. It can be widely used in formation testing, workover, testing, pay zone transformation and other constructions. It is a multi-functional down-hole plugging tool with safety, reliability and low cost.
2. Work Principle
Connect retrievable bridge plug with the bottom of the hydraulic transportation tools (cable setting tool), put downward bridge plug to designed depth, and give pressure to the pipe column (ignition) with pump. Pull the tension rods (ring) of the plug to break (cut off) it and realize sealing. The transportation tool is pulled out of the well with the column. If necessary, put the special plug fishing tool down the well to unseal and get the plug out of the well.