System and method for a column adapter and a column suspension interface tool

Description

1 / 19 SYSTEM AND METHOD FOR A COLUMN ADAPTER AND A COLUMN SUSPENSION INTERFACE TOOL CROSS-REFERENCE TO RELATED REQUEST(S)

[0001] This is a PCT application for non-provisional US patent application No. 18 / 621,847, entitled TREE ADAPTER AND TUBING HANGER INTERFACE TOOL SYSTEM AND METHOD, filed March 29, 2024, which are both related to and claim the benefit of priority of provisional US application No. 63 / 456,570, also entitled TREE ADAPTER AND TUBING HANGER INTERFACE TOOL SYSTEM AND METHOD, filed April 3, 2023, and which are both incorporated herein by reference in the present invention in its entirety for all purposes. BACKGROUND Field of revelation

[0002] The embodiments of the present disclosure relate to oil and gas tools and, in particular, to systems and methods for a column adapter and a column hanger interface tool. Description of the prior art

[0003] In oil and gas production from subsea or onshore wells, an assembly of valves, casing spools, and accessories, often referred to as a Christmas tree (XT), can be used to regulate the flow of materials into and out of the well. Various types of XTs may contain components of different sizes or spacing, such as string hangers or internal string caps, which may be arranged in different ways within the XT. A string hanger seating or retrieval tool may be designed for use in a specific XT, based on the specific components of that XT. However, it may be desirable to use alternative tools instead of those specifically designed for components. Petition 870250089967, dated 02 / 10 / 2025, page 14 / 190 2 / 19 specific to XT, for example, during operations such as well interventions and plugging and abandonment campaigns. SUMMARY

[0004] The applicant recognized the problems indicated above in the present invention, and designed and developed embodiments of systems and methods, according to the present disclosure, for Christmas tree systems.

[0005] In one embodiment, the well intervention tool includes a Christmas tree adapter (XT) connected to an XT, an axially aligned string hanger interface tool within the adapter chuck, and a fitting connected to the string hanger interface tool, the fitting in contact with at least one internal component of the XT. The XT includes an XT chuck. The XT adapter includes an adapter chuck positioned above the XT chuck.

[0006] In another embodiment, a system includes a blowout preventer (BOP), an XT, and an intervention system. The intervention system includes an adapter chuck axially aligned with a hole in the XT, an adapter connection positioned to couple the adapter chuck to the XT, a column hanger interface tool positioned to extend through the adapter chuck, and a fitting coupled to the column hanger interface tool, the fitting in contact with one or more components of the XT.

[0007] In one embodiment, a system includes an XT and an intervention system. The intervention system includes an adapter integrated into the BOP, a column hanger interface tool positioned to extend through the adapter integrated into the BOP, and a fitting coupled to the column hanger interface tool, the fitting being in contact with one or more components of the XT. The adapter integrated into the BOP includes an XT adapter and a BOP. Petition 870250089967, dated 02 / 10 / 2025, p. 15 / 190 3 / 19 BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The present technology will be better understood by reading the following detailed description of non-limiting embodiments thereof and by analyzing the attached drawings, in which:

[0009] Figure 1A is a schematic side view of an embodiment of a subsea drilling operation, according to the embodiments of the present disclosure;

[0010] Figure 1B is a schematic cross-sectional view of an embodiment of a wellbore system, according to the embodiments of the present disclosure.

[0011] Figure 2A is a schematic cross-sectional view of an embodiment of an XT adapter and a column hanger interface tool incorporated into a horizontal XT type with an internal column cap, according to the embodiments of the present disclosure.

[0012] Figure 2B is a schematic cross-sectional view of an embodiment of an XT adapter integrated into a BOP and a hanger interface tool incorporated into a horizontal XT type with an internal column cap, according to the embodiments of the present disclosure.

[0013] Figure 3A is a schematic cross-sectional view of an embodiment of an XT adapter and a column hanger interface tool incorporated into a horizontal XT type with a column hanger, according to the embodiments of the present disclosure.

[0014] Figure 3B is a schematic cross-sectional view of an embodiment of an XT adapter integrated into a BOP and a column hanger interface tool incorporated into a horizontal XT type with a column hanger, according to the embodiments of the present disclosure.

[0015] Figure 4A is a schematic cross-sectional view of an embodiment of an XT adapter and a column hanger interface tool incorporated into another type of horizontal XT with a column hanger, according to the embodiments of the present disclosure, and Petition 870250089967, dated 02 / 10 / 2025, page 16 / 190 4 / 19

[0016] Figure 4B is a schematic cross-sectional view of an embodiment of an XT adapter integrated into a BOP and a column hanger interface tool incorporated into another type of horizontal XT with a column hanger, according to the embodiments of the present disclosure. DETAILED DESCRIPTION

[0017] The aforementioned aspects, features and advantages of the present technology will also be recognized when considered with reference to the description of preferred embodiments and the attached drawings, with similar reference numbers representing similar elements. In the description of preferred embodiments of the technology illustrated in the attached drawings, specific terminology will be used for the sake of clarity. The present technology, however, is not intended to be limited to the specific terms used, and it should be understood that each specific term includes equivalents that operate in a similar manner to achieve a similar purpose.

[0018] When introducing elements from various embodiments of the present disclosure, the articles "a," "an," "the," and the expressions "the said / the said" are intended to mean that there is one or more of the elements. The terms "comprises," "includes," and "has" are intended to be inclusive and mean that there may be additional elements beyond those mentioned. Any examples of operational parameters and / or environmental conditions are not exclusive of other parameters / conditions of the disclosed embodiments. Additionally, it should be understood that references to "a embodiment," "the embodiment," "certain embodiments," or other embodiments of the present disclosure are not intended to be interpreted as excluding the existence of additional embodiments that also incorporate the mentioned features.Furthermore, references to terms such as above, below, superior, inferior, lateral, front, rear, or other terms associated with orientation are made with reference to the modalities illustrated and are not intended to be limiting, nor to exclude others. Petition 870250089967, dated 02 / 10 / 2025, p. 17 / 190 5 / 19 guidelines. Additionally, references to substantially, approximately, or about may refer to differences within ranges of + / -10 percent.

[0019] The embodiments of the present disclosure are directed to an XT adapter and a string hanger interface tool that offer a solution for wellbore operations, such as, but not limited to, well intervention and plugging and abandonment campaigns, enabling a simple interface with a string hanger or an internal string cap, including in connection with third-party equipment. Systems and methods may provide an adaptable interface that can be used with a variety of different downhole components, including those supplied by different manufacturers. For example, various embodiments may allow third-party equipment to interact with various wellbore components, such as hangers or internal string caps. One of the main considerations for operators when selecting third parties for well interventions and plugging and abandonment campaigns is the original supplier of the XT system.Most tubing hangers or internal tubing caps are unique to each vendor, and as a result, the original vendor usually also supplies run-and-retrieval tools that can effectively connect and seal the original XT system equipment. This connection and sealing capability is essential for well intervention and plugging and abandonment operations. Current tubing hanger run-and-retrieval tool designs lock the tool into the tubing hanger or internal tubing cap, either on an internal or external profile. Most tubing hanger or internal tubing cap designs (including the top interface used for installation, retrieval, or intervention) are unique to a specific vendor and their associated tubing hanger run-and-retrieval tool.It is neither practical nor economical to design and manufacture column hanger execution or recovery tools to fit different third-party equipment. Petition 870250089967, dated 02 / 10 / 2025, page 18 / 190 6 / 19 The embodiments of the present disclosure provide systems and methods for using the same set of tools (e.g., a column adapter and a column hanger interface tool) for different column hangers or internal column covers along with a project-specific fitting. In at least one embodiment, the systems and methods can design and manufacture the fitting on a project-by-project basis; however, the column adapter and column hanger interface tool can be used on a variety of different XT components, reducing and / or removing restrictions and costs when performing operations on third-party supplied equipment.

[0020] In at least one embodiment of the present disclosure, a string adapter and a string hanger interface tool are used to lock the wellbore component (e.g., wellhead or string mandrel). The string adapter may first lock the wellhead or string mandrel via common connections such as CIW, SG-1, etc. Additionally, the string hanger interface tool may lock the string adapter and seal the inner bore of the string hanger or inner string cap. Consequently, the systems and methods may allow interaction with and sealing of third-party string hangers or inner string caps (e.g., string hangers and / or inner string caps not supplied by the entity providing the string adapter and string hanger interface tool) to enable well intervention and plugging and abandonment operations (among other options).Furthermore, the column hanger interface tool is capable of locking the column adapter and sealing the inner bore of the column hanger or inner column cap with only a design-specific fitting to suit the particular equipment. Consequently, the systems and methods disclosed in this document can be used on substantially any type of wellhead equipment already installed (e.g., subsea equipment, land-based equipment, etc.) for wellbore operations. Since most of the... Petition 870250089967, dated 02 / 10 / 2025, p. 19 / 190 7 / 19 tools (except for project-specific fittings) are universal and can be used for different wells, costs can be spread over several projects and / or years, making the systems and methods a cheaper, more competitive and viable option for operators.

[0021] The embodiments of the present disclosure may overcome one or more problems with existing units and operations. Several embodiments are directed to systems and methods to solve problems associated with the interaction and sealing difficulties of producer-specific wellbore components. In many well operations, most installed XT string hangers or inner string caps are unique to each supplier. As a result, most owners will return to the original installation manufacturer for subsequent wellbore work, as what generally occurs is that only a given supplier's string hanger execution and retrieval tool allows connection and sealing capabilities to that specific supplier's string hangers and inner string caps.It is not economical to design and manufacture tubing hanger execution and recovery tools to suit various types of third-party equipment, such as for well intervention, plugging, and abandonment operations. For example, individual interface components can be expensive to design and manufacture, and the return on investment may be low if only a small number of wellbore operations use such interfaces. Furthermore, details regarding the XT interface and sealing surfaces may be limited, and extensive testing may be required.

[0022] Figure 1A is a schematic side view of an embodiment of a subsea drilling system 100. It should be considered that one or more features have been removed for clarity in the present discussion and that the removal or inclusion of certain features is not intended to be limiting, but provided only by way of example. Furthermore, although the embodiment illustrated describes a subsea drilling operation, it should be considered that one or more processes Petition 870250089967, dated 02 / 10 / 2025, page 20 / 190 8 / 19 similar arrangements can be used in surface applications and, in various embodiments, similar or substantially similar arrangements described in this document can also be used in surface applications. In this example, the drilling operation includes a vessel 102 floating on a sea surface 104 substantially above a subsea wellbore 106. As noted, the vessel 102 is for illustrative purposes only and the systems and methods can be illustrated with other structures such as floating / fixed platforms and the like. A wellbore housing 108 rests on top of the subsea wellbore 106 and is connected to a blowout protector (BOP) assembly 110, which may include shear gates 112, sealing gates 114 and / or an annular gate 116. Another purpose of the BOP assembly 110 is to help control the pressure in the subsea wellbore 106. The BOP assembly 110 is connected to the vessel 102 by a riser 118.During drilling operations, a drill string 120 passes from a platform 122 on vessel 102, through riser 118, through BOP assembly 110, through wellhead housing 108 to subsea wellbore 106. It should be noted that the reference to vessel 102 is for illustrative purposes only and that the vessel may be replaced by a floating / fixed platform or other structure. The lower end of the drill string 120 is attached to a drill bit 124 which extends the subsea wellbore 106 as the drill string 120 rotates. The additional features shown in Figure 1 include a mud pump 126 with mud lines 128 connecting the mud pump 126 to the BOP assembly 110 and a mud return line 130 connecting the mud pump 126 to the vessel 102. A remotely operated vehicle (ROV) 132 can be used to make adjustments, repairs, or replace equipment as needed.Although a BOP 110 assembly is shown in the figures, the wellhead housing 108 can also be coupled to other well equipment, including, for example, a string, a spool, a manifold, or another valve or completion assembly. Petition 870250089967, dated 02 / 10 / 2025, p. 21 / 190 9 / 19

[0023] An efficient way to start drilling a subsea well hole 106 is by using a suction pile 134. This procedure is performed by attaching the wellhead housing 108 to the top of the suction pile 134 and lowering the suction pile 134 to the seabed 136. As the internal chambers in the suction pile 134 are evacuated, the suction pile 134 is driven to the seabed 136, as shown in Figure 1, until the suction pile 134 is substantially submerged in the seabed 136 and the wellhead housing 108 is positioned on the seabed 136 so that further drilling can begin. As subsea well 106 is drilled, the well walls are reinforced with concrete casings 138 that provide stability to subsea well 106 and help control formation pressure.It should be noted that this describes an example of a portion of a subsea drilling operation and that it may be omitted in various embodiments. In at least one embodiment, the systems and methods of the present disclosure can be used for drilling operations that are completed via a BOP and a wellhead, wherein a casing hanger and a string are positioned sequentially. As noted above, configurations relating to the seabed or any offshore application are for illustrative purposes only, and the embodiments of the present disclosure may also be used in surface drilling applications.

[0024] Figure 1B is a schematic side view of an embodiment of a surface drilling system 150, which may include a completion system, a recovery system, or a drilling system. In this example, the surface drilling system 150 includes a rig 152 and a string 154 coupled to the rig 152. The string 154 may extend through a wellhead assembly (not shown), such as a blowout protector (BOP) and / or one or more valve configurations. The wellhead assembly may be a surface assembly that is not visible in the illustrated embodiment due to a rig platform 152, but should be Petition 870250089967, dated 02 / 10 / 2025, p. 22 / 190 10 / 19 appreciated that it can be provided in various modalities. The systems and methods can be used in modalities where one or more completion or recovery operations are initiated, such as when string 154 is suspended in a wellbore 156 of the surface well. In this example, string 154 can be a completion or production string, which may include one or more tubulars coupled together and suspended from one or more features, such as the wellhead assembly and / or a casing / string hanger, among other options. It should be appreciated that string 154 can also be a casing string, where one or more cementing operations can be used to cement and fix string 154 to a wellbore wall. Furthermore, various modalities can also implement such configurations during drilling operations, where string 154 includes a drill bit at one end.

[0025] In this example, column 154 is suspended in an annular space 158 formed between column 154 and a wellbore wall 160. Column 154, as noted above, may be attached to one or more assemblies that are configured to receive and support column 154, such as a hanger assembly. During operation, the hanger assembly may be disposed within the wellbore 156 of the surface well or at a surface location, and may include one or more seals to control the pressure within the wellbore.

[0026] Figure 2A is a schematic cross-sectional view of an embodiment of a subsea XT 200 group. The subsea XT 200 group consists of a BOP 110 assembly and an XT 202 comprising a column hanger 230 and an inner column cap 234, both axially aligned along an axis 260 within a mandrel 204 of the XT 202. The XT 202 is positioned around the mandrel 204 of the subsea well 106. It should be appreciated that this example embodiment is a subsea operation, but various embodiments can also be applied to surface operations. Petition 870250089967, dated 02 / 10 / 2025, p. 23 / 190 11 / 19

[0027] As shown, an XT 210 adapter locks onto the XT 202 using a 212 connection between the XT 210 adapter and the 204 chuck. The XT 210 adapter may include an associated adapter chuck 222 that is positioned above the 204 chuck and aligns axially with the 204 chuck along the 260 axis. It should be appreciated that while the BOP assembly 110 is typically situated directly above the 204 chuck of the XT 202, the inclusion of the XT 210 adapter with its associated adapter chuck 222 above the XT 202 causes the BOP assembly 110 to be positioned directly above the 222 adapter chuck and thus positioned further away from the 204 chuck. The addition of the XT 210 adapter and the associated adapter chuck 222 essentially lengthens the subsea well 106 to create a extended well 208 which extends even further above the XT 202 and is axially surrounded by the adapter chuck 222.

[0028] In this example, the column hanger interface tool 220 is shown inside the adapter mandrel 222 and axially aligned along the extended wellbore 208. In at least one embodiment, the column hanger interface tool 220 locks the adapter mandrel 222 through an internal locking profile 254. The column hanger interface tool 220 can be attached to a fitting 224 through a threaded connection 252. The fitting 224 extends downward axially along the axis 260, from the column hanger interface tool 220, to fit into the inner column cap 234 and form a seal 244 with the inner column cap 234. In at least one embodiment, the seal 244 can be a metal-to-metal seal. In at least one embodiment, the seal 244 can be an elastomer or polymer seal.In at least one mode, combinations of seals can be used, which can be specifically selected based on operating conditions. This intervention on the XT 202 allows various oil and gas related operations to take place on the XT 202 and even further downhole in subsea well 106. Petition 870250089967, dated 02 / 10 / 2025, p. 24 / 190 12 / 19

[0029] The embodiments of the present disclosure may include an adapter and chuck connection 212, which may be any common connection, such as CIW, SG-1, etc. The locking mechanism 242 of the adapter chuck and BOP may be any common connection, such as CIW, SG-1, etc. The internal locking profile 254 between the adapter chuck 222 and the column hanger interface tool 220 may be achieved by using clamps to prevent or transmit movement through physical engagement or an actuating sleeve. The manner in which the fitting 224 and the internal column cap 234 form the seal 244 may be through an elastomeric sealing mechanism, among other feasible mechanisms.

[0030] Figure 2B is a schematic cross-sectional view of an embodiment of a submarine XT group 268, which shares similar features with Figure 2A, such as the XT 202, the column hanger interface tool 220 and others, which will be identified with similar reference numbers for convenience only and not to limit the scope of the present disclosure. A key difference between the XT submarine group 200 in Figure 2A and the XT submarine group 268 in Figure 2B is that the XT submarine group 268 contains an adapter integrated into the BOP 270. The adapter integrated into the BOP 270 combines the XT adapter 210, the adapter mandrel 222, and the BOP 110 from Figure 2A into a single unit of the adapter integrated into the BOP 270. The adapter integrated into the BOP 270 can be directly attached to the XT 202 mandrel 204 via the locking mechanism of the BOP 242 without the use of an adapter mandrel 222.The internal locking profile 254 can act to lock the adapter integrated into the BOP 270 to the column hanger interface tool 220. The locking mechanism 242 can act to lock the adapter integrated into the BOP 270 to the chuck 204.

[0031] In the embodiment illustrated in Figure 2B, as in Figure 2A, the column hanger interface tool 220 can be fixed to a fitting 224 via a threaded connection 252. The fitting 224 extends downwards axially along the axis 260, from the column hanger interface tool 220 in the adapter integrated into the BOP 270, to Petition 870250089967, dated 02 / 10 / 2025, page 25 / 190 13 / 19 fits into the inner column cover 234 and forms a seal 244 with the inner column cover 234. In at least one embodiment, the seal 244 may be a metal-to-metal seal. In at least one embodiment, the seal 244 may be an elastomer or polymer seal. In at least one embodiment, combinations of seals may be used, which may be specifically selected based on operating conditions.

[0032] Figure 3A is a schematic cross-sectional view of another embodiment of a subsea XT 300 group. The subsea XT 300 group consists of the BOP 110 assembly and the XT 202 comprising the string hanger 230 aligned axially along axis 260 within the mandrel 204 of the XT 202. Unlike Figure 2A, this embodiment does not contain the inner string cap 234. The XT 202 is positioned around the mandrel 204 of the subsea wellbore 106.As noted in this document, various modalities can be used for underwater systems, but systems and methods may also be applicable to surface applications.

[0033] As shown, the XT 210 adapter locks the XT 202 using the 212 connection between the XT 210 adapter and the 204 chuck. The XT 210 adapter may include the associated adapter chuck 222 which is positioned above the 204 chuck and aligns axially with the 204 chuck along the 260 axis. It should be appreciated that while the BOP 110 assembly is typically situated directly above the 204 chuck of the XT 202, the inclusion of the XT 210 adapter with its associated adapter chuck 222 above the XT 202 causes the BOP 110 assembly to be positioned directly above the 222 adapter chuck and thus positioned further away from the 204 chuck. The addition of the XT 210 adapter and the associated adapter chuck 222 essentially lengthens the subsea well 106 to create the extended well 208 which extends even further above the XT 202 and is axially surrounded by the adapter chuck 222.

[0034] In this example, the column hanger interface tool 220 is shown inside the adapter chuck 222 and axially aligned along the extended well 208. In at least one embodiment, the tool Petition 870250089967, dated 02 / 10 / 2025, p. 26 / 190 The column hanger interface tool 220 locks the adapter chuck 222 through the internal locking profile 254. The column hanger interface tool 220 can be attached to a longer fitting 226 through the threaded connection 252. The longer fitting 226 extends downward axially along the shaft 260, from the column hanger interface tool 220, to penetrate the column hanger 230 and form the seal 244 with the column hanger 234. It should be appreciated that in this exemplary embodiment, the longer fitting 226 is designed to be longer than the fitting 224 of the exemplary embodiment of Figure 2A. The longer fitting 226 of this exemplary embodiment is designed to be longer to reach deep enough into the subsea wellbore 106 to make contact with and form the seal 244 with the string hanger 230, since there is no internal string cap 234 in this exemplary embodiment.In at least one embodiment, seal 244 may be a metal-to-metal seal. In at least one embodiment, seal 244 may be an elastomer or polymer seal. In at least one embodiment, combinations of seals may be used, which may be specifically selected based on operating conditions. This intervention on the XT 202 by the XT 210 adapter and the 220 column hanger interface tool allows various oil and gas related operations to occur on the XT 202 and even further downhole in the subsea wellbore 106.

[0035] The embodiments of the present disclosure may include the adapter and chuck connection 212, which may be any common connection, such as CIW, SG-1, etc. The locking mechanism 242 of the adapter chuck and BOP may be any common connection, such as CIW, SG-1, etc. The internal locking profile 254 between the adapter chuck 222 and the column hanger interface tool 220 may be achieved by using clamps to prevent or transmit movement through physical engagement or an actuating sleeve. The manner in which the longer fitting 226 and the column hanger 230 form the seal 244 may be through an elastomeric sealing mechanism, among other feasible mechanisms. Petition 870250089967, dated 02 / 10 / 2025, p. 27 / 190 15 / 19

[0036] Figure 3B is a schematic cross-sectional view of an embodiment of a submarine XT group 368, which shares similar features with Figure 3A, such as the XT 202, the column hanger interface tool 220 and others, which will be identified with similar reference numbers for convenience only and not to limit the scope of the present disclosure. A key difference between the XT submarine group 300 in Figure 3A and the XT submarine group 368 in Figure 3B is that the XT submarine group 368 contains the adapter integrated into the BOP 270. The adapter integrated into the BOP 270 essentially combines the XT adapter 210, the adapter mandrel 222, and the BOP 110 from Figure 3A into a single unit of the adapter integrated into the BOP 270. The adapter integrated into the BOP 270 can be directly attached to the XT 202 mandrel 204 via the locking mechanism of the BOP 242 without the use of an adapter mandrel 222.The internal locking profile 254 can act to lock the adapter integrated into the BOP 270 to the column hanger interface tool 220. The locking mechanism 242 can act to lock the adapter integrated into the BOP 270 to the chuck 204.

[0037] In the embodiment illustrated in Figure 3B, as in Figure 3A, the column hanger interface tool 220 can be attached to a longer fitting 226 via the threaded connection 252. The longer fitting 226 extends axially downward along the shaft 260, from the column hanger interface tool 220 of the adapter integrated into the BOP 270, to penetrate the column hanger 230 and form the seal 244 with the column hanger 234. It should be appreciated that in this exemplary embodiment, the longer fitting 226 is designed to be longer than the fitting 224 of the exemplary embodiment of Figure 2A. The longer fitting 226 of this exemplary embodiment is designed to be longer to reach deep enough into the subsea wellbore 106 to make contact with and form the seal 244 with the string hanger 230, since there is no internal string cap 234 in this exemplary embodiment.In at least one embodiment, the 244 seal may be a metal-to-metal seal. In at least one embodiment, the seal... Petition 870250089967, dated 02 / 10 / 2025, page 28 / 190 16 / 19 244 can be an elastomer or polymer seal. In at least one embodiment, combinations of seals can be used, which can be specifically selected based on operating conditions.

[0038] Figure 4A is a schematic cross-sectional view of an embodiment of another subsea XT 400 group. The subsea XT 400 group is composed of the BOP 110 assembly and the XT 202 comprising an alternative column hanger 232 aligned axially along axis 260 within the mandrel 204 of the XT 202. As in Figure 3A, this embodiment does not contain an internal column cap 234. The XT 202 is positioned around the mandrel 204 of the subsea well 106. As noted in this document, various embodiments may exhibit subsea systems, but systems and methods may also be applicable to surface applications.

[0039] As shown, the XT 210 adapter locks the XT 202 using the 212 connection between the XT 210 adapter and the 204 chuck. The XT 210 adapter may include an associated adapter chuck 222 which is positioned above the 204 chuck and aligns axially with the 204 chuck along the 260 axis. It should be appreciated that while the BOP 110 assembly is typically situated directly above the 204 chuck of the XT 202, the inclusion of the XT 210 adapter with its associated adapter chuck 222 above the XT 202 causes the BOP 110 assembly to be positioned directly above the 222 adapter chuck and thus positioned further away from the 204 chuck. The addition of the XT 210 adapter and the associated adapter chuck 222 essentially lengthens the subsea well 106 to create the extended well 208 which extends even further above the XT 202 and is axially surrounded by the adapter chuck 222.

[0040] In this example, the column hanger interface tool 220 is shown inside the adapter chuck 222 and axially aligned along the extended wellbore 208. In at least one embodiment, the column hanger interface tool 220 locks the adapter chuck 222 via the internal locking profile 254. The column hanger interface tool 220 can be attached to an alternative fitting 228 via the threaded connection. Petition 870250089967, dated 02 / 10 / 2025, page 29 / 190 17 / 19 252. The alternative fitting 228 extends downward axially along axis 260, from the string hanger interface tool 220, to penetrate the alternative string hanger 230 and make a seal 244 with the alternative string hanger 234. It should be appreciated that, in this exemplary embodiment, the alternative fitting 228 is designed to have a different size and shape from those of the fitting 224 and the longer fitting 226 of the exemplary embodiments of Figure 2A and Figure 3A, respectively. The alternative fitting 228 of this exemplary embodiment is designed to have a specific shape in order to reach deep enough into the subsea wellbore 106 to make contact and form a seal 244 with the alternative string hanger 232, since the alternative string hanger has a different size and shape from those of the string hanger 230 of Figure 3A.In at least one embodiment, seal 244 may be a metal-to-metal seal. In at least one embodiment, seal 244 may be an elastomer or polymer seal. In at least one embodiment, combinations of seals may be used, which may be specifically selected based on operating conditions. This intervention on the XT 202 by the XT 210 adapter and the 220 column hanger interface tool allows various oil and gas related operations to occur on the XT 202 and even further downhole in the subsea wellbore 106.

[0041] The embodiments of the present disclosure may include the adapter and chuck connection 212, which may be any common connection, such as CIW, SG-1, etc. The locking mechanism 242 of the adapter chuck and BOP may be any common connection, such as CIW, SG-1, etc. The internal locking profile 254 between the adapter chuck 222 and the column hanger interface tool 220 may be achieved by using clamps to prevent or transmit movement through physical engagement or an actuating sleeve. The manner in which the alternative fitting 228 and the alternative column hanger 232 form the seal 244 may be through an elastomeric sealing mechanism, among other feasible mechanisms. Petition 870250089967, dated 02 / 10 / 2025, p. 30 / 190 18 / 19

[0042] Figure 4B is a schematic cross-sectional view of an embodiment of a submarine XT group 468, which shares similar features with Figure 4A, such as the XT 202, the column hanger interface tool 220 and others, which will be identified with similar reference numbers for convenience only and not to limit the scope of the present disclosure. A key difference between the XT submarine group 400 in Figure 4A and the XT submarine group 468 in Figure 4B is that the XT submarine group 468 contains the adapter integrated into the BOP 270. The adapter integrated into the BOP 270 essentially combines the XT adapter 210, the adapter mandrel 222, and the BOP 110 from Figure 4A into a single unit. The adapter integrated into the BOP 270 can be directly attached to the XT 202 mandrel 204 via the BOP 242 locking mechanism without the use of an adapter mandrel 222.The internal locking profile 254 can act to lock the adapter integrated into the BOP 270 to the column hanger interface tool 220. The locking mechanism 242 can act to lock the adapter integrated into the BOP 270 to the chuck 204.

[0043] In the embodiment illustrated in Figure 4B, as in Figure 4A, the column hanger interface tool 220 can be attached to an alternative fitting 228 via the threaded connection 252. The alternative fitting 228 extends downward axially along the axis 260, from the column hanger interface tool 220, to penetrate the alternative column hanger 230 and make the seal 244 with the alternative column hanger 234. It should be appreciated that, in this exemplary embodiment, the alternative fitting 228 is designed to have a different size and shape from those of the fitting 224 and the longer fitting 226 of the exemplary embodiments of Figures 2A, 2B, 3A and 3B.The alternative fitting 228 of this exemplary embodiment is designed to have a specific shape in order to reach deep enough into the subsea wellbore 106 to make contact and form a seal 244 with the alternative string hanger 232, since the alternative string hanger has a different size and shape from those of the string hanger 230 of Figure 3A. In at least one. Petition 870250089967, dated 02 / 10 / 2025, page 31 / 190 In embodiment 19 / 19, seal 244 can be a metal-to-metal seal. In at least one embodiment, seal 244 can be an elastomer or polymer seal. In at least one embodiment, combinations of seals can be used, which can be specifically selected based on operating conditions.

[0044] Although, in the present document, the technology has been described with reference to specific embodiments, it should be understood that these embodiments are merely illustrative of the principles and applications of the present technology. Therefore, it should be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised, without departing from the spirit and scope of the present technology as defined by the appended claims. Petition 870250089967, dated 02 / 10 / 2025, page 32 / 190

Claims

1 / 3 CLAIMS 1. Well intervention tool characterized by comprising: an XT adapter connected to an XT, the XT including an XT mandrel, wherein the XT adapter comprises an adapter mandrel positioned above the XT mandrel; an axially aligned column hanger interface tool within the adapter mandrel; and a fitting connected to the column hanger interface tool, wherein the fitting contacts at least one internal component of the XT.

2. Well intervention tool, according to claim 1, characterized by further comprising: a metal-to-metal seal between the fitting and at least one internal component of the XT.

3. Well intervention tool, according to claim 1, characterized by further comprising: a polymeric or elastomeric seal between the fitting and at least one internal component of the XT.

4. Well intervention tool, according to any one of claims 1 to 3, characterized in that the fitting is connected to the string hanger interface tool by a threaded connection.

5. Well intervention tool, according to any one of claims 1 to 4, characterized in that the adapter chuck and the string hanger interface tool are connected by the use of clamps or an actuating sleeve.

6. Well intervention tool, according to any one of claims 1 to 5, characterized in that at least one internal component of the XT comprises an internal column cap. Petition 870250089967, dated 10 / 02 / 2025, page 33 / 190 2 / 3 7. Well intervention tool, according to any one of claims 1 to 5, characterized in that at least one internal component of the XT comprises a string hanger.

8. A system characterized by comprising: a BOP; an XT; and an intervention system, comprising: an adapter mandrel, the adapter mandrel being axially aligned with a hole in the XT; an adapter connection positioned to couple the adapter mandrel to the XT; a column hanger interface tool positioned to extend through the adapter mandrel; and a fitting coupled to the column hanger interface tool, the fitting connecting one or more components of the XT.

9. System according to claim 8, characterized in that the adapter chuck and the column hanger interface tool are connected by the use of clamps or an actuating sleeve.

10. System characterized by comprising: an XT; and an intervention system comprising: an adapter integrated into the BOP, comprising an XT adapter and a BOP; a column hanger interface tool positioned to extend through the adapter integrated into the BOP; and a fitting coupled to the column hanger interface tool, the fitting connecting one or more components of the XT.

11. System, according to any one of claims 8 to 10, characterized by further comprising: Petition 870250089967, dated 02 / 10 / 2025, page 34 / 190 3 / 3 a seal between the fitting and one or more XT components, the seal comprising a metal-to-metal seal, a polymeric seal or an elastomeric seal.

12. System, according to any one of claims 10 to 11, characterized in that the XT adapter of the adapter integrated into the BOP and the column hanger interface tool are connected by the use of clamps or an actuation sleeve.

13. System, according to any one of claims 8 to 12, characterized in that the fitting is connected to the column hanger interface tool by a threaded connection.

14. System according to any one of claims 8 to 13, characterized in that at least one internal component of the XT comprises an internal column cover.

15. System, according to any one of claims 8 to 13, characterized in that at least one internal component of the XT comprises a column hanger. Petition 870250089967, dated 10 / 02 / 2025, p. 35 / 190

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