# US 10,502,012 B2 · Push to release c-ring slip retention system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,502,012 B2 - Document ID: US10502012B2 - Status: Granted - Kind: B2 - Application number: 15/838,775 - Filed: 2017-12-12 - Published: 2019-06-13 - Granted: 2019-12-10 - Earliest claimed: 2017-12-12 - Assignees: Dril-Quip, Inc. - Applicants: Dril-Quip, Inc. - Inventors: Steven M. Zakharia; Curtis W. Payne; Frank D. Kalb - Web page: https://patentgrep.com/patent/US10502012B2 ## CPC - E21B 23/01: for anchoring the tools or the like (E21B23/02 - E21B23/06 take precedence; anchoring of drives in the borehole E21B4/18) - E21B 33/04: Casing heads; Suspending casings or tubings in well heads - E21B 43/10: Setting of casings, screens, liners {or the like} in wells - E21B 43/108: {Expandable screens or perforated liners} - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS ## Abstract An improved c-ring slip retention system and method for extraction of the c-ring slip are provided. The c-ring slip retention system may use a lip portion of a retention sleeve to hold the c-ring slip against a liner hanger body. The c-ring slip may have a multi-load shoulder profile that interfaces directly with a complementary profile formed in the liner hanger body. The disclosed retention system prevents the c-ring slip from being prematurely extracted from a liner hanger body while the liner hanger is lowered through a borehole. The c-ring slip retention system may include a first retention mechanism and a second retention mechanism used to secure the retention sleeve to the liner hanger body. A single actuation of at least one setting segment in an axial direction may disengage both retention mechanisms, move the retention sleeve axially relative to the liner hanger body, and extract the c-ring slip. ## Claims ### Claim 1 A c-ring slip retention system, comprising: a liner hanger body; a c-ring slip disposed around the liner hanger body; a retention sleeve disposed around the liner hanger body and comprising a lip portion extending over the c-ring slip, wherein the lip portion compresses the c-ring slip into engagement with the liner hanger body; a first retention mechanism and a second retention mechanism each directly connecting and securing the retention sleeve to the liner hanger body; and at least one setting segment disposed in a space or slot formed in the liner hanger body, wherein the setting segment is axially movable relative to the liner hanger body to deactivate the first retention mechanism and the second retention mechanism. ### Claim 2 (depends on 1) The c-ring slip retention system of claim 1, wherein the c-ring slip comprises a keyed profile, and wherein an outer wall of the liner hanger body comprises a complementary profile. ### Claim 3 (depends on 2) The c-ring slip retention system of claim 2, wherein the keyed profile comprises a front shoulder and a back shoulder extending from the c-ring slip, wherein the front and back shoulders have different widths or heights. ### Claim 4 (depends on 3) The c-ring slip retention system of claim 3, wherein the back shoulder is closer to an axial end of the c-ring slip than the front shoulder, and wherein the back shoulder has a larger width than the front shoulder. ### Claim 5 (depends on 3) The c-ring slip retention system of claim 3, wherein the back shoulder comprises an inclined surface. ### Claim 6 (depends on 1) The c-ring slip retention system of claim 1, wherein the first retention mechanism comprises an expandable lock ring. ### Claim 7 (depends on 6) The c-ring slip retention system of claim 6, wherein the liner hanger body comprises an indentation formed therein, the retention sleeve comprises an indentation formed therein, and the lock ring is disposed within one or both of the indentations. ### Claim 8 (depends on 7) The c-ring slip retention system of claim 7, wherein the setting segment comprises an inclined surface, wherein the inclined surface is configured to move the lock ring into the indentation of the retention sleeve in response to axial movement of the setting segment. ### Claim 9 (depends on 1) The c-ring slip retention system of claim 1, wherein the second retention mechanism comprises a shear screw configured to shear in response to a shear force between the retention sleeve and the liner hanger body. ### Claim 10 (depends on 9) The c-ring slip retention system of claim 9, wherein the second retention mechanism comprises a plurality of shear screws disposed circumferentially about the retention sleeve. ### Claim 11 (depends on 9) The c-ring slip retention system of claim 9, wherein the setting segment comprises a projection having a shoulder, wherein the shoulder is configured to engage a complementary shoulder on the retention sleeve and exert a shear force between the retention sleeve and the liner hanger body in response to axial movement of the setting segment. ### Claim 12 A method, comprising: holding a c-ring slip in an axial position between a liner hanger body and a retention sleeve disposed around the liner hanger body; securing the retention sleeve to the liner hanger body via a first retention mechanism and a second retention mechanism each coupled between the retention sleeve and the liner hanger body; and axially moving at least one setting segment within a space or slot in the liner hanger body; and disengaging the first and second retention mechanisms via the setting segment in response to the axial movement of the setting segment. ### Claim 13 (depends on 12) The method of claim 12, wherein holding the c-ring slip in the axial position comprises pressing a keyed profile of the c-ring slip against a complementary profile on the liner hanger body. ### Claim 14 (depends on 12) The method of claim 12, further comprising axially moving the retention sleeve in response to disengaging the first and second retention mechanisms, and releasing the c-ring slip in response to the axial movement of the retention sleeve. ### Claim 15 (depends on 14) The method of claim 14, further comprising expanding the c-ring slip into engagement with a frustoconical tapered surface of the liner hanger body upon releasing the c-ring slip. ### Claim 16 (depends on 12) The method of claim 12, wherein disengaging the first retention mechanism comprises expanding a lock ring. ### Claim 17 (depends on 16) The method of claim 16, further comprising pressing against the lock ring via an inclined surface of the setting segment to expand the lock ring. ### Claim 18 (depends on 12) The method of claim 12, wherein disengaging the second retention mechanism comprises shearing one or more shear screws. ### Claim 19 (depends on 16) The method of claim 16, further comprising exerting a shear force between the retention sleeve and the liner hanger body via a shoulder on the setting segment engaging a shoulder on the retention sleeve. ### Claim 20 (depends on 12) The method of claim 12, further comprising axially moving the at least one setting segment via a hydraulic piston on a liner hanger running tool.