# US 2025/0146375 A1 · Bore selector > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0146375 A1 - Document ID: US20250146375A1 - Status: Published application - Kind: A1 - Application number: 18/835,876 - Filed: 2023-02-06 - Published: 2025-05-08 - Earliest claimed: 2022-02-07 - Assignees: Enovate Systems Limited - Applicants: Enovate Systems Limited - Inventors: Ibiye ROBERTS - Web page: https://patentgrep.com/patent/US20250146375A1 ## CPC - E21B 17/18: Pipes provided with plural fluid passages {(E21B17/203 takes precedence)} - E21B 33/038: Connectors used on well heads, e.g. for connecting blow-out preventer and riser - E21B 17/01: Risers - E21B 2200/04: Ball valves - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS ## Abstract A bore selector for use with a monobore riser and a multi-bore subsea system having a production bore and an annulus bore. The bore selector has a housing extending in a longitudinal direction and a bore selector element rotatably mounted to the housing and is rotatable about an axis which extends substantially transverse to the longitudinal direction. The bore selector element may comprise a ball element, or a cylindrical element. The bore selector element has a first passage extending through the bore selector element and is configured to connect the monobore riser to the production bore at a first rotational position of the bore selector element, and a second passage extending through the bore selector element and is configured to connect the monobore riser to the annulus bore at a second rotational position of the bore selector element. The first and second passages may intersect within the bore selector element. ## Claims ### Claim 1 A bore selector for use with a monobore riser and a multi-bore subsea system having a production bore and an annulus bore, the bore selector comprising: a housing extending in a longitudinal direction, and a bore selector element rotatably mounted to the housing and rotatable about an axis extending substantially transverse to the longitudinal direction, the bore selector element comprising: a first passage extending through the bore selector element and configured to connect the monobore riser to the production bore at a first rotational position of the bore selector element, and a second passage extending through the bore selector element and configured to connect the monobore riser to the annulus bore at a second rotational position of the bore selector element. ### Claim 2 (depends on 1) The bore selector of claim 1, wherein each of the first passage and the second passage has a first opening and a second opening formed in a surface of the bore selector element. ### Claim 3 (depends on 1) The bore selector of claim 1, wherein the first and second passages intersect within the bore selector element. ### Claim 4 (depends on 1) The bore selector of claim 1, further comprising a first connector for connection to the monobore riser, and a monobore adapter disposed between the bore selector element and the first connector. ### Claim 5 (depends on 4) The bore selector of claim 4, wherein the monobore adapter defines a portion of a seat within which the bore selector element is rotatable. ### Claim 6 (depends on 1) The bore selector of claim 1, further comprising a second connector for connection to the multi-bore subsea system, and a bore isolator disposed between the bore selector element and the second connector. ### Claim 7 (depends on 6) The bore selector of claim 6, wherein the bore isolator comprises a production bore passage for connection to the production bore, and an annulus bore passage for connection to the annulus bore. ### Claim 8 (depends on 7) The bore selector of claim 7, wherein the production bore passage and the annulus bore passage are separate. ### Claim 9 (depends on 6) The bore selector of claim 6, wherein the bore isolator is exchangeable such that the bore selector can be configured for different multi-bore subsea systems. ### Claim 10 (depends on 6) The bore selector of claim 6, wherein the bore isolator defines a portion of a seat within which the bore selector element is rotatable. ### Claim 11 (depends on 5) The bore selector of claim 5, wherein rotation of the bore selector element is configured to shear a wireline medium between the bore selector element and the monobore adapter and/or bore isolator. ### Claim 12 (depends on 1) The bore selector of claim 1, wherein the bore selector element comprises a ball element. ### Claim 13 (depends on 1) The bore selector of claim 1, wherein the bore selector element comprises a cylindrical element. ### Claim 14 (depends on 1) The bore selector of claim 1, further comprising an actuator configured to rotate the bore selector element. ### Claim 15 (depends on 14) The bore selector of claim 14, wherein the actuator comprises a scotch-yoke mechanism. ### Claim 16 (depends on 15) The bore selector of claim 15, wherein the actuator comprises a hydraulic piston. ### Claim 17 (depends on 14) The bore selector of claim 14 wherein the actuator is pressure balanced. ### Claim 18 (depends on 1) The bore selector of claim 1, further comprising a circulation sub-assembly connectable between the bore selector element and the multi-bore subsea system. ### Claim 19 (depends on 1) The bore selector of claim 1, wherein the housing defines an outermost surface of the bore selector, and wherein the housing is adapted to fit within a monobore riser. ### Claim 20 (depends on 1) The bore selector of claim 1, wherein an outer diameter of the bore selector, in particular an outer diameter of the housing, is at most 18.5 inches (0.47 m). ### Claim 21 (depends on 1) Apparatus for connection to a subsea well, the apparatus comprising a monobore riser system comprising a monobore riser, and a bore selector according to claim 1. ### Claim 22 (depends on 21) The apparatus of claim 21, wherein the bore selector is received within the monobore riser system. ### Claim 23 (depends on 21) The apparatus of claim 21, wherein the apparatus is a well intervention apparatus. ### Claim 24 (depends on 21) The apparatus of claim 21, wherein the apparatus is a well plug and abandonment apparatus. ### Claim 25 (depends on 21) The apparatus of claim 21, wherein the apparatus is a well installation apparatus.