Housing assembly for a core orientation device

Abstract

Abstract Assembly 10 for containing a core orientation device 12 when deployed in a high temperature downhole environment. The assembly 10 includes a housing 14 defining external surfaces 16 and a bore 18, and a device chassis 20 shaped to fit within the bore 18 and defining a salable cavity 22 for receiving the core orientation device 12. The housing 14 has an uphole end 24, an opposed downhole end 26, and an axis 28 extending therebetween, and is configured to inhibit heat transfer from the external surfaces 16 to the bore 18. Abstract 2022279491 01 Dec 2022 surfaces 16 to the bore 18. 1 / 6 Fig. 2 50 62 60 Fig. 1 10 52 54 56 58 10 14 o 20 22 27 94 91 0 1 D ec 2 02 201 Dec 2022 56 2022279491 10 54 62 14 60

Claims

1. An assembly for containing a core orientation device deployed in a hightemperature downhole environment, the assembly including:a housing having an uphole end, an opposed downhole end, and an axis extending therebetween, the housing defining external surfaces and a bore, and configured to inhibit heat transfer from the external surfaces to the bore, the housing configured as a vacuum flask including a dual-wall construction spaced to contain a vacuum gap;a device chassis shaped to fit within the bore and engage the housing, the device chassis defining a sealable cavity for receiving the core orientation device, and having a first tooling structure extending axially from an uphole end of the chassis; anda payload removal tool defining a second tooling structure shaped to engage the first tooling structure, whereby engaging the payload removal tool and the device chassis, and rotating the payload removal tool causes rotation of the device chassis relative to the housing to allow removing the device chassis from the housing and cooling the device chassis and the housing.

2. The assembly of claim 1, wherein the payload removal tool includes a bodydefining the second axially extending tooling structure and a collar slidably and rotatably mounted on the body, the collar configured to be axially fixed relative to the housing to retain the second tooling structure in engagement with the first tooling structure.

3. The assembly of claim 2, wherein the payload removal tool includes defines astop arranged to limit axial movement of the collar relative to the body, wherein, in use, the collar is slidable between a first position to be axially fixed to the housing, and a second position to be abut the stop and be disassociated from the housing.

4. The assembly of claim 2 or 3, wherein the payload removal tool includes ahandle configured to be releasably mountable to the body to be rotationally locked to,2022279491   29 May 2026and extend radially away from, the body to allow manual rotation of the payload removal tool.

5. The assembly of any one of the preceding claims, wherein each of the firsttooling structure and the second tooling structure include a plurality of axially extending projections, the projections shaped and arranged to be complementary to allow interlocking the device chassis and the payload removal tool.

6. The assembly of any one of the preceding claims, wherein the payloadremoval tool defines a recess shaped to receive and retain a portion of a controller operable to communicate with the core orientation device to obtain core orientation data, the recess arranged, in use, to align the controller with the sealable cavity.

7. The assembly of any one of the preceding claims, wherein the device chassiscomprises a multi-body construction including at least one body configured as a heat sink and arranged at an end of the sealable cavity.

8. The assembly of any one of the preceding claims, wherein the device chassisincludes a valve assembly having a cover mounted across an uphole end of the sealable cavity to seal the cavity, the cover configured to axially displace responsive to fluid pressure within the cavity exceeding a threshold, such that displacement of the cover allows fluid to be released from the cavity.

9. The assembly of claim 8, wherein the valve assembly includes a stop structurearranged to limit axial movement of the cover within a defined range.

10. The assembly of claim 8 or 9, wherein the cover is retained in a sealingposition across the uphole end of the cavity by at least one resiliently deformable member arranged to extend radially from the cover.

11. The assembly of claim 10, wherein the valve assembly includes at least onecanted spring arranged to retain the cover in the sealing position.2022279491   29 May 202612.     The assembly of any one of claims 8 to 11, wherein the cover includes awindow arranged to allow optical signals to be communicated to the sealable cavity.

13. The assembly of any one of the preceding claims, wherein the downhole endof the housing includes a check valve comprising a movable ball and a seat member secured relative to the housing by at least one deformable clip, whereby deforming the at least one clip allows removal of the seat member.

14. The assembly of any one of the preceding claims wherein each of the upholeend and the downhole end of the housing include an adaptor configured to engage the housing and one of a specific core tube and a backend assembly component.

15. A downhole assembly including:the assembly of any one of the preceding claims, anda core orientation device sealably contained in the sealable cavity of the device chassis.

16. A downhole assembly including:the assembly of any one of claims 8 to 14, anda core orientation device sealably contained in the sealable cavity of the device chassis, the core orientation device including a battery, and the valve assembly arranged to operate responsive to gas venting from the battery and into the sealable cavity.

17. A system for obtaining core orientation data in a high temperatureenvironment, the system including:the assembly of any one of claims 1 to 14;a core orientation device sealably contained in the sealable cavity of the device chassis; anda temperature-controlled container defining a cooled internal volume, the internal volume dimensioned to receive at least the device chassis of the assembly.2022279491   29 May 202618.     The system of claim 17, further including at least one cooling rod dimensionedto fit within the bore of the housing and configured as a heat sink.

19. The system of claim 17 or 18 including:a further assembly of any one of claims 1 to 14; anda further core orientation device sealably contained in the sealable cavity of the device chassis of the further assembly,the further assembly being deployable downhole while at least the device chassis of the other assembly is stored in the temperature-controlled container for cooling.

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