# US 2017/0254166 A1 · Well Assembly with Self-Adjusting Lockdown Assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0254166 A1 - Document ID: US20170254166A1 - Status: Published application - Kind: A1 - Application number: 15/060,361 - Filed: 2016-03-03 - Published: 2017-09-07 - Earliest claimed: 2016-03-03 - Assignees: OneSubsea IP UK Limited - Applicants: OneSubsea IP UK Limited - Inventors: Benjamin Scott Berryhill - Web page: https://patentgrep.com/patent/US20170254166A1 ## CPC - E21B 33/038: Connectors used on well heads, e.g. for connecting blow-out preventer and riser - E21B 33/043: specially adapted for underwater well heads ({E21B33/0407,} E21B33/047 take precedence) - 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: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS ## Abstract A self-adjusting lockdown assembly for engaging and/or preloading a tubular hanger to an interior of a wellhead housing. The lockdown assembly includes a support sleeve, a body received in the support sleeve, an elevator ring coaxially engaged with the support sleeve, a lock ring engaged with the elevator ring, and an actuator sleeve configured to move axially between the body and the elevator ring so as to adjust the position of the lock ring. ## Claims ### Claim 1 A well system, comprising: a housing; and a lockdown assembly engageable with a tubular hanger and an interior of the housing, comprising: a support sleeve; a body received in the support sleeve; an elevator ring engaged with the support sleeve; a lock ring engaged with the elevator ring; and an actuator sleeve configured to move axially between the body and the elevator ring so as to adjust the position of the lock ring. ### Claim 2 (depends on 1) The well system of claim 1, wherein the actuator sleeve comprises a groove configured to receive a pin positioned on the elevator ring. ### Claim 3 (depends on 1) The well system of claim 1, wherein the elevator ring comprises a pin positioned to engage the actuator sleeve. ### Claim 4 (depends on 1) The well system of claim 1, wherein the elevator ring comprises a follower configured to mate with a cam positioned on the support sleeve. ### Claim 5 (depends on 1) The well system of claim 1, wherein the lock ring comprises a split lock ring, and the tubular hanger is landable in the housing. ### Claim 6 (depends on 1) The well of claim 1, wherein the lock ring is configured to be adjusted into locking engagement with the interior of the housing. ### Claim 7 (depends on 1) The well system of claim 1, wherein the actuator sleeve is moveable between the body and the lock ring. ### Claim 8 (depends on 1) The well system of claim 1, wherein the actuator sleeve includes a first outer diameter configured to adjust a second outer diameter of the lock ring upon relative movement of the actuator sleeve. ### Claim 9 (depends on 2) The well system of claim 2, wherein the groove is angled between about 5 degrees and about 50 degrees from a longitudinal axis of the body. ### Claim 10 (depends on 1) The well system of claim 1, further comprising an additional elevator ring located between the support sleeve and the elevator ring. ### Claim 11 (depends on 10) The well system of claim 10, wherein the second elevator ring comprises a cam configured to mate with a follower positioned on the elevator ring. ### Claim 12 (depends on 10) The well system of claim 10, wherein the actuator sleeve comprises grooves configured to receive pins positioned on the elevator rings. ### Claim 13 A method of installing a lockdown assembly in a wellhead housing, comprising: moving an actuator sleeve axially between a lock ring and a body in a first direction so as to radially expand the lock ring; raising the lock ring axially opposite the first direction by rotating an elevator ring with the axial movement of the actuator sleeve; and continuing to move the actuator sleeve to expand and raise the lock ring into locking engagement with the wellhead housing. ### Claim 14 (depends on 13) The method of claim 13, wherein raising the lock ring comprises moving the elevator ring along a cylindrical cam. ### Claim 15 (depends on 13) The method of claim 13, wherein raising the lock ring comprises receiving a pin on the elevator ring in a groove on the actuator sleeve. ### Claim 16 (depends on 15) The method of claim 15, wherein raising the lock ring comprises rotating the elevator ring by translating the axial movement of the actuator sleeve to a rotary movement of the elevator ring through the pin on the elevator ring following the groove on the actuator sleeve. ### Claim 17 A lockdown assembly, comprising: a cylindrical cam; a follower engaged with the cylindrical cam; a lock ring configured to move with the follower; and an actuator sleeve configured to move axially in the lock ring and the follower so as to adjust the position of the lock ring. ### Claim 18 (depends on 17) The lockdown device of claim 17, wherein the lock ring is configured to be adjusted into locking engagement with an interior of a housing. ### Claim 19 (depends on 17) The lockdown device of claim 17, wherein the actuator sleeve comprises a groove configured to receive a pin positioned on at least one of (a) the cylindrical cam and (b) the follower. ### Claim 20 (depends on 19) The lockdown device of claim 19, wherein the groove is angled to rotate at least one of (a) the cylindrical cam and (b) the follower from the axial movement of the actuator sleeve.