The Sealing Assembly, comprises housing and pack off bushing, is used to seal the annular clearance between polished nipple and liner hanger body so as to build pressure after the ball reaches the landing collar. The top end connects PBR and the internal left-hand thread connects setting tool.
1. The pack off bushing can be retrieved with setting tool, saving time to drill out.
2. “W” sealing rings are used to obtain two-sides sealing function. The sealing effect is better and it’s sealing capacity is more than 25MPa.
3. With centralizing block on body, makes the hanger in the center of wellbore.
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