Before pouring cement, put the lower anti-rotation cementing plug first, pump and scrape the well wall to clean the well wall, which is used to separate the lower cement slurry and mud to prevent the cement slurry from being polluted. After pressing, since the lower rubber plug is hollow, hold back the pressure of 2-4 MPa to break the rubber membrane, provide a channel for the cement slurry, and establish a circulation. Then, cement is injected, the upper anti-rotation cementing plug is put in, pumped and pressed, and the cementing is completed.

SS type rubber stopper and DS type rubber stopper are designed and manufactured according to the requirements of SY5394-91. The core material is made of aluminum alloy or polymer material, with good drillability. The rubber stopper is made of imported nitrile rubber, which is resistant to oil, acid and alkali. The structure adopts 5W type, and the scraping and replacement effect is good.

1. The series of cementing rubber plugs are divided into ordinary cementing rubber plugs and anti-rotation cementing rubber plugs, upper and lower rubber plugs for double-plug cementing and upper, middle and lower rubber plugs for double-stage cementing.

2. Standard cement plugs are suitable for all kinds of floating hoops and shoes; anti-rotation cement plugs are suitable for anti-transformation floating hoops and shoes.

3. Double-stage sealing and scraping wings are designed on the top and bottom plugs. The scraping wings of polyurethane have good cleaning sleeve function and abrasion resistance.

4. The anti-rotation rubber plug is designed with an anti-rotation mechanism, which can greatly improve the drilling and removal speed.

5. PDC bit or roller bit can be drilled.