Retrievable bridge plug of cement squeezing is a downhole cement squeezing and plugging tool used in oilfields, which mainly consists of setting mechanism, anchoring mechanism, sealing mechanism and sliding sleeve switching mechanism etc. The retrievable bridge plug of cement squeezing is set by cable setting tools or hydraulic setting tools. After cement squeezing, it can be released and recovered. After wearing parts are changed, it can be still reutilized downhole.
II. Operating Principle
Setting: connect the retrievable bridge plug of cement squeezing to the lower end of the hydraulic setting tool (cable setting tool), run the bridge plug to the designed depth, and use a cementing truck to pressurize the pipe string (cable ignition), so that the tensile ring of the bridge plug is snapped off, the bridge plug is set and the setting tool is pulled out of the well bore together with the pipe string (cable).
Cement squeezing: connect the cement squeezing tool of the bridge plug to the cement squeezing pipe string and then run the cement squeezing tool into a well. The cement squeezing tool of the bridge plug enters the main body of the bridge plug of cement squeezing and drives the copper sliding sleeve to move downwards. Cement squeezing can be started when the cement squeezing hole of the copper sliding sleeve is connected with that of the bridge plug body. After completing cement squeezing, the cement squeezing tool of the bridge plug is lifted, and the copper sliding sleeve of the bridge plug returns the initial sealing state.
Releasing: the bridge plug can be released and pulled out of the well by a special bridge plug fishing tool.
III.Main Technical Parameters
Operating pressure differential
1. During the transport and handling , collision,humidity and drench is not allowed
2.The well shoud be drifted,scraped and washed before the bridge plug run down the well,
3. when the hydraulic setting tool connect to the pipe string, threads of the topconnection should be wrapped around the raw material belt, and tight with a pipe plier.
4. It shall be stored in clean ventilation but no rain and snow hit areas ,and may not be in the sun for long-term exposure.Storage period from the date of production should not more than a year and a half.