# US 12,768,252 B2 · Subsea fluid transfer system and process for using the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,768,252 B2 - Document ID: US12768252B2 - Status: Granted - Kind: B2 - Application number: 19/424,397 - Filed: 2025-12-18 - Published: 2026-06-25 - Granted: 2026-10-20 - Earliest claimed: 2024-12-23 - Assignees: Koil Energy Solutions, Inc. - Applicants: Koil Energy Solutions, Inc. - Inventors: Michael Shane Fields; Stanley O'Neil Stuckey, Jr.; Troy Moran; Christopher Lee Sebesta - Web page: https://patentgrep.com/patent/US12768252B2 ## CPC - E21B 43/013: Connecting a production flow line to an underwater well head - E21B 43/017: Production satellite stations, i.e. underwater installations comprising a plurality of satellite well heads connected to a central station - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS ## Abstract Subsea fluid transfer systems and process for using same. The subsea fluid transfer system can include first and second end termination assemblies, a plurality of fluid transfer conduits, and a plurality of separator assemblies. The first and second end termination assemblies can each include a mechanical connector first part, a fluid coupler first part, and a fluid header conduit in fluid communication with the fluid coupler first part. The plurality of fluid transfer conduits can be in fluid communication with the fluid header conduit of the first and second end termination assemblies. Each separator assembly can define a plurality of conduit bores therethrough and each fluid transfer conduit can be disposed within a corresponding conduit bore defined each separator assembly. The plurality of separator assemblies can be distributed along a length of the plurality of fluid transfer conduits and configured to maintain a separation distance between adjacent fluid transfer conduits. ## Claims ### Claim 1 A subsea fluid transfer system, comprising: a first end termination assembly and a second end termination assembly, each comprising: a mechanical connector first part; a fluid coupler first part; and a fluid header conduit in fluid communication with the fluid coupler first part; a plurality of fluid transfer conduits each having a first end and a second end, wherein the first end of each fluid transfer conduit is in fluid communication with the fluid header conduit of the first end termination assembly, and the second end of each fluid transfer conduit is in fluid communication with the fluid header conduit of the second end termination assembly; and a plurality of separator assemblies, wherein each separator assembly defines a plurality of conduit bores therethrough, and each fluid transfer conduit is disposed within a corresponding conduit bore; wherein: the plurality of separator assemblies is distributed along a length of the plurality of fluid transfer conduits and maintains a separation distance between adjacent fluid transfer conduits. ### Claim 2 (depends on 1) The subsea fluid transfer system of claim 1, further comprising a plurality of elevator modules, wherein each elevator module is configured to be disposed about a corresponding separator assembly. ### Claim 3 (depends on 2) The subsea fluid transfer system of claim 2, wherein the plurality of elevator modules is configured to maintain at least a portion of the plurality of fluid transfer conduits at an elevation above a seabed. ### Claim 4 (depends on 3) The subsea fluid transfer system of claim 3, wherein: the mechanical connector first part of the first end termination assembly is configured to connect to a corresponding mechanical connector second part disposed on a first subsea structure, the mechanical connector first part of the second end termination assembly is configured to connect to a corresponding mechanical connector second part disposed on a second subsea structure, the fluid coupler first part of the first end termination assembly is configured to fluidly connect to a corresponding fluid coupler second part disposed on the first subsea structure, and the fluid coupler first part of the second end termination assembly is configured to fluidly connect to a corresponding fluid coupler second part disposed on the second subsea structure. ### Claim 5 (depends on 4) The subsea fluid transfer system of claim 4, further comprising a bend restrictor assembly configured to limit a curvature of a portion of the plurality of fluid transfer conduits to within a predetermined limit, wherein the bend restrictor assembly is configured to be connected to the first end termination assembly or the second end termination assembly. ### Claim 6 (depends on 2) The subsea fluid transfer system of claim 2, wherein each elevator module comprises a first part and a second part configured to engage with one another about a corresponding separator assembly. ### Claim 7 (depends on 1) The subsea fluid transfer system of claim 1, wherein the plurality of fluid transfer conduits is free from an outer sheath. ### Claim 8 (depends on 7) The subsea fluid transfer system of claim 7, wherein the plurality of fluid transfer conduits is configured to transfer a fluid between a first subsea structure and a second subsea structure. ### Claim 9 (depends on 8) The subsea fluid transfer system of claim 8, wherein: each of the plurality of fluid transfer conduits is configured to be in direct contact with a body of water, and the system is configured to transfer heat from the fluid through a wall of each fluid transfer conduit to the body of water when the fluid is being transferred between the first subsea structure and the second subsea structure. ### Claim 10 (depends on 7) The subsea fluid transfer system of claim 7, wherein: each elevator module is formed of a buoyant material, each elevator module further comprises an anchor and a tether, and at least a portion of the plurality of transfer conduits floats above a seabed of a body of water. ### Claim 11 (depends on 2) The subsea fluid transfer system of claim 2, wherein each elevator module comprises a first part and a second part configured to engage with one another, and at least one draw bar assembly configured to secure the first part and the second part of each elevator module to one another and about a corresponding separator assembly. ### Claim 12 (depends on 1) The subsea fluid transfer assembly of claim 1, wherein the plurality of separator assemblies is distributed along a length of the plurality of fluid transfer conduits between the first end termination assembly and the second end termination assembly. ### Claim 13 (depends on 1) The subsea fluid transfer assembly of claim 1, wherein: the subsea fluid transfer system comprises a first bend restrictor assembly configured to be connected to the first end termination assembly, the subsea fluid transfer system comprises a second bend restrictor assembly configured to connected to the second end termination assembly, and the plurality of separator assemblies is distributed along a length of the plurality of fluid transfer conduits between the first bend restrictor assembly and the second bend restrictor assembly. ### Claim 14 (depends on 1) The subsea fluid transfer assembly of claim 1, wherein: the fluid header conduit of the first end termination assembly defines a bore therethrough, the fluid header conduit of the second end termination assembly defines a bore therethrough, the first end of each fluid transfer conduit in the plurality of fluid transfer conduits is configured to be in fluid communication with the bore defined by the fluid header conduit of the first end termination assembly, and the second end of each fluid transfer conduit in the plurality of fluid transfer conduits is configured to be in fluid communication with the bore defined by the fluid header conduit of the second end termination assembly. ### Claim 15 A process for transferring a fluid between a first subsea structure and a second subsea structure, comprising: deploying a subsea fluid transfer system toward a seabed of a body of water, wherein the subsea fluid transfer system comprises: a first end termination assembly and a second end termination assembly each comprising a mechanical connector first part, a fluid coupler first part, and a fluid header conduit in fluid communication with the fluid coupler first part; a plurality of fluid transfer conduits each having a first end and a second end, wherein the first end of each fluid transfer conduit is in fluid communication with the fluid header conduit of the first end termination assembly, and the second end of each fluid transfer conduit is in fluid communication with the fluid header conduit of the second end termination assembly; and a plurality of separator assemblies, wherein each separator assembly defines a plurality of conduit bores therethrough, and each fluid transfer conduit is disposed within a corresponding conduit bore; wherein the plurality of separator assemblies is distributed along a length of the plurality of fluid transfer conduits and maintains a separation distance between adjacent fluid transfer conduits; connecting the mechanical connector first part of the first end termination assembly to a mechanical connector second part disposed on the first subsea structure such that the fluid coupler first part of the first end termination assembly is in fluid communication with the fluid coupler second part disposed on the first subsea structure; and connecting the mechanical connector first part of the second end termination assembly to a mechanical connector second part disposed on the second subsea structure such that the fluid coupler first part of the second end termination assembly is in fluid communication with the fluid coupler second part disposed on the second subsea structure. ### Claim 16 (depends on 15) The process of claim 15, wherein the subsea fluid transfer system further comprises a bend restrictor assembly connected to the first end termination assembly or the second end termination assembly, wherein the bend restrictor assembly is configured to limit a curvature of a portion of the plurality of fluid transfer conduits to within a specified allowable limit. ### Claim 17 (depends on 16) The process of claim 16, further comprising a plurality of elevator modules wherein each elevator module is disposed about a corresponding separator assembly. ### Claim 18 (depends on 17) The process of claim 17, wherein the plurality of elevator modules is configured to maintain the plurality of fluid transfer conduits at an elevation above a seabed. ### Claim 19 (depends on 18) The process of claim 18, wherein at least one of the plurality of fluid transfer conduits comprises a metallic tube. ### Claim 20 (depends on 19) The process of claim 19, wherein the system is configured to transfer a heat energy of the fluid through a wall of each fluid transfer conduit to the body of water when the fluid is transferred between the first subsea structure and the second subsea structure. ### Claim 21 (depends on 15) The subsea fluid transfer assembly of claim 15, wherein the plurality of separator assemblies is distributed along a length of the plurality of fluid transfer conduits between the first end termination assembly and the second end termination assembly. ### Claim 22 A subsea fluid transfer system, comprising: a first end termination assembly and a second end termination assembly, each comprising: a mechanical connector first part; a fluid coupler first part; and a fluid header conduit in fluid communication with the fluid coupler first part; a plurality of fluid transfer conduits each having a first end and a second end, wherein the first end of each fluid transfer conduit is in fluid communication with the fluid header conduit of the first end termination assembly, and the second end of each fluid transfer conduit is in fluid communication with the fluid header conduit of the second end termination assembly; a plurality of separator assemblies, wherein each separator assembly defines a plurality of conduit bores therethrough, and each fluid transfer conduit is disposed within a corresponding conduit bore; a plurality of elevator modules wherein each elevator module is disposed about a corresponding separator assembly; a first bend restrictor assembly connected to the first end termination assembly configured to limit a curvature of a portion of the plurality of fluid transfer conduits to within a specified allowable limit; and a second bend restrictor assembly connected to the second end termination assembly configured to limit a curvature of a portion of the plurality of fluid transfer conduits to within a specified allowable limit, wherein: the mechanical connector first part of the first end termination assembly is configured to connect to a corresponding mechanical connector second part disposed on a first subsea structure, the mechanical connector first part of the second end termination assembly is configured to connect to a corresponding mechanical connector second part disposed on a second subsea structure, the fluid coupler first part of the first end termination assembly is configured to fluidly connect to a corresponding fluid coupler second part disposed on the first subsea structure, the fluid coupler first part of the second end termination assembly is configured to fluidly connect to a corresponding fluid coupler second part disposed on the second subsea structure, the plurality of separator assemblies is distributed along a length of the plurality of fluid transfer conduits and configured to maintain a separation distance between adjacent fluid transfer conduits, and the plurality of elevator modules is configured to maintain the plurality of fluid transfer conduits at an elevation above a seabed. ### Claim 23 (depends on 22) The subsea fluid transfer assembly of claim 22, wherein the plurality of separator assemblies is distributed along a length of the plurality of fluid transfer conduits between the first bend restrictor assembly and the second bend restrictor assembly.