The coupling is installed on the casing string at a specified depth interval during well casing
Prevents the impact of excess hydrostatic pressure on weak formations and ensures the cement is raised to the planned depth even in the presence of absorbent zones
Allows hydraulic opening of the cementing ports (without using a dropping plug or "bomb"), making the coupling suitable for use in horizontal sections of the wellbore
Features a lock on the moving cylinder that closes the cementing ports of the coupling
Operational zenith angle greater than 90 degrees
The stage cementing coupling can also be manufactured with enhanced operational characteristics for use in high-pressure wells
Premium threaded connections can be produced upon agreement with the customer
It consists of a body containing opening and closing sleeves. The sleeves are secured by shear screws. The closing sleeve features a seating cone for the upper wiper plug and a position lock. The opening sleeve also has a seating cone for the dropping plug.
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