Floating equipment is generally used in the lower section of the well to help:
- Reduce strain on the derrick while guiding casing past ledges and slough zones in the hole;
- Provide a landing point for bottom and top cementing plugs (pumped ahead of and behind the slurry as part of cementing operations);
- Provide a backpressure valve to prevent cement from flowing back into the inner diameter of the casing after the cement has turned the corner into the annulus and the top plug has been bumped.
.
ENERPEC float shoe contains a backpressure valve that prevents fluids from entering the casing while the pipe is lowered into the hole and prevents cement from flowing back into the casing after placement, while enabling circulation down through the casing.