US 12,241,329 B1
Automatic slip-style casing hanger for use with surface wellheads
Richard Bridwell, Houston, TX (US); and Brian Baca, Houston, TX (US)
Assigned to FMC Technologies, Inc., Houston, TX (US)
Filed by FMC Technologies, Inc., Houston, TX (US)
Filed on Oct. 18, 2023, as Appl. No. 18/489,267.
Int. Cl. E21B 33/04 (2006.01)
CPC E21B 33/0422 (2013.01) 19 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
a casing hanger, comprising;
at least two rings, comprising,
an upper ring; and
a lower ring; and
a packing element, comprising a wedge-shaped cross-sectional geometry and extending annularly between the upper ring and the lower ring,
bi-directional pressure intensification (BPI) pins arranged around the casing hanger in an angularly spaced apart configuration, wherein the BPI pins extend axially from the upper ring through holes in the packing element to the lower ring, and
multiple bolt members, each bolt member threaded to a female end of the BPI pins.