Slip type casing hanger with integral high pressure isolation plate

Abstract

The invention relates to a slip type casing hanger assembly, having a hanger body with an annulus, a casing head disposed around casing for supporting and transferring weight of the casing string to the casing head. The slip type casing hanger assembly further includes (a) an adjustable isolation plate for sealing the annulus, further including a lower plate landing on a load shoulder, an upper plate adjoining the annulus, and a spacer separating the lower plate from the upper plates; (b) a plurality of fasteners for securing the spacer to the upper plate and the lower plate; (c) at least two slip segments, each comprising a plurality of teeth for engaging and suspend the casing string, with each slip segment having a top step and bottom step for engaging the hanger body; (d) at least one alignment ring for aligning the slip segments, and (e) locking apparatus for securing the isolation plate against the load shoulder.

Dependencies are inferred from the claim text.