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The use of anti-rotation cementing plugs

The use of anti-rotation cementing plugs

(Summary description)Insert the plug connected with the drill string into the sealing socket of the casing floating hoop or floating shoe, and inject cement through the drill string for cementing, which is called inner pipe string cementing.

The use of anti-rotation cementing plugs

(Summary description)Insert the plug connected with the drill string into the sealing socket of the casing floating hoop or floating shoe, and inject cement through the drill string for cementing, which is called inner pipe string cementing.

Information

1. Inner string cementing

Insert the plug connected with the drill string into the sealing socket of the casing floating hoop or floating shoe, and inject cement through the drill string for cementing, which is called inner pipe string cementing. Inner string cementing is mainly used for cementing of large size (16"~30") conduit or surface casing.

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2. Single-stage double-plug cementing

First run the casing to the predetermined well depth, then install the cement head, rubber plug (top plug and bottom plug), circulate the cement, apply the isolation fluid, cast the bottom plug, then inject the cement slurry, and then cast the top plug to start replacing the mud. The bottom plug fell on the floating hoop and was broken down. The top and bottom plugs are pressed, and the cementing ends.

3. Liner cementing

Liner cementing is to use drill pipe to send the liner to the suspension design depth, then hang the liner on the outer casing through the liner hanger, first set the liner hanger, and then start to inject cement and cast the drill pipe glue. The plug is replaced, the drill pipe rubber plug is cut off and the liner rubber plug is overlapped with the liner rubber plug, and then goes down to the ball seat to touch the pressure, and the cementing is completed.

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