Scalloped landing ring

摘要

A landing ring having at least one scallop groove formed on an interior of the ring. The landing ring interfaces with a fluted mandrel casing hanger such that the scallop groove aligns between flutes of the hanger. This alignment of the scallop groove of the landing ring with the fluted mandrel casing hanger provides sufficient clearance to allow a stabbing in of a cement tube for cement injection during cement topping operations or debris clean out down hole.

主权项

1. A surface wellhead assembly for cementing casing, comprising:
a landing ring adapted to be secured to an upper end of a wellbore casing, the landing ring having a downward facing shoulder on an outer surface for landing on a rim of the casing, the landing ring having an internal upward facing shoulder; a casing hanger adapted for supporting casing and having an axis; a plurality of flutes disposed equidistant from each other on an exterior surface of the casing hanger; a plurality of gaps defined by space between each of the flutes on the casing hanger; and at least one axially extending groove formed on an interior surface of the landing ring that aligns with at least one of the gaps between the flutes on the casing hanger to provide a cement tube passage for a fill up cement tube to stab into the space of the groove.