float collar
The casing floating apply to horizontal or highly-deviated wells. When running the casing, connect the collar on the casing string, then come into being provisional shield in the casing. The casing string dowm the floating collar full air, the casing string up the floating collar full drilling fluid. Then increase the buoyancy of the casing string down the floating collar, cause the casing string down the floating colla be in the floating condition so as to declease the resistance that run the casing. The drilling fluid increase the pressure so as to the casing run in the hole favoring. The floating collar consists of floating collar body, appropriative float collar and float shoe, top plug and bottom plug etc.
Float shoe and float collar: | |
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