Force coupling assemblies and related systems and methods

1 . A force coupling assembly, comprising:

an inner assembly including an inner support ring positioned about an inner ring axis;

an outer assembly including an outer support ring positioned about an outer ring axis;

superhard contact elements coupled to the inner support ring and the outer support ring, superhard contact surfaces of the superhard contact elements configured to transfer a torque via at least some of the superhard contact elements between the inner assembly and the outer assembly when a rotational force is applied to the force coupling assembly; and

one or more thrust bearing elements configured to transfer a thrust force applied between the inner assembly and the outer assembly in a direction at least partially along at least one of the inner ring axis or the outer ring axis.

2 . The force coupling assembly of claim 1 , wherein a thrust contact surface of the one or more thrust bearing elements is positioned transverse to at least one of the inner ring axis or the outer ring axis.

3 . The force coupling assembly of claim 2 , wherein a thrust contact surface of the one or more thrust bearing elements is positioned substantially perpendicular to at least one of the inner ring axis or the outer ring axis.

4 . The force coupling assembly of claim 1 , wherein, when at least one of the rotational force or the thrust force is applied between the inner assembly and the outer assembly, the inner assembly is at least partially engaged with the outer assembly and is configured to not substantially rotate relative to the outer assembly.

5 . A torque coupling assembly, comprising:

an inner assembly including an inner support ring positioned about an inner ring axis;

an outer assembly including an outer support ring positioned about an outer ring axis;

superhard contact elements coupled to the inner support ring and the outer support ring, superhard contact surfaces of the superhard contact elements configured to transfer a torque via at least some of the superhard contact elements between the inner assembly and the outer assembly when a rotational force is applied to the torque coupling assembly; and

one or more thrust bearing elements comprising additional superhard contact elements, the additional superhard contact elements positioned and configured to support the torque coupling assembly when an axial loading is applied between the inner assembly and the outer assembly in a direction at least partially along at least one of the inner ring axis or the outer ring axis.

6 . The torque coupling assembly of claim 5 , wherein the superhard contact surfaces of the superhard contact elements are configured to remain in contact with an adjacent superhard contact surface of the superhard contact elements when at least one of the rotational force or the axial loading is applied to the torque coupling assembly.

7 . The torque coupling assembly of claim 5 , wherein the inner assembly further comprises an inner thrust bearing support structure supporting a first set of the additional superhard contact elements and the outer assembly further comprises an outer thrust bearing support structure supporting a second set of the additional superhard contact elements.

8 . The torque coupling assembly of claim 7 , wherein the inner thrust bearing support structure and the outer thrust bearing support structure are separate and distinct from the inner support ring and the outer support ring.

9 . The torque coupling assembly of claim 7 , wherein the inner thrust bearing support structure and the outer thrust bearing support structure are integrated with the inner support ring and the outer support ring.

10 . The torque coupling assembly of claim 5 , wherein the inner support ring is configured to tilt relative to the outer support ring while at least some of the superhard contact elements and at least some of the additional superhard contact elements remain in contact with each other.

11 . The torque coupling assembly of claim 5 , wherein the additional superhard contact elements are positioned such that a majority of the superhard contact surfaces extend in a direction set at an oblique angle to at least one of the inner ring axis or the outer ring axis.

12 . The torque coupling assembly of claim 5 , wherein the additional superhard contact elements are positioned such that a majority of the superhard contact surfaces extend in a direction that is substantially perpendicular to at least one of the inner ring axis or the outer ring axis.

13 . The torque coupling assembly of claim 12 , wherein the additional superhard contact elements secure the inner support ring in a fixed position relative to the outer support ring.

14 . The torque coupling assembly of claim 5 , wherein at least some of the superhard contact elements and the additional superhard contact elements comprise at least one of polycrystalline diamond, a carbide material, or a nitride material.

15 . The torque coupling assembly of claim 5 , wherein the superhard contact surfaces of at least some of the superhard contact elements and the additional superhard contact elements comprise one or more of a substantially planar surface, a partially convex spherical surface, a partially concave spherical surface, a partially convex substantially cylindrical surface, or a partially concave substantially cylindrical surface.

16 . A rotary motion system, comprising:

a shaft;

a rotational energy device configured to apply torque to the shaft in order to rotate the shaft; and

at least one force coupling assembly comprising the torque coupling assembly of claim 1 operably coupled to the shaft and another component, the at least one force coupling assembly configured to transfer at least some of the torque applied to the shaft by the rotational energy device to the another component of the system via the at least one force coupling assembly, the at least one force coupling assembly further configured to receive a thrust force via the shaft or the another component with the one or more thrust bearing elements.

17 . The rotary motion system of claim 16 , wherein the rotary motion system comprises a subterranean drilling system with the shaft being coupled to the another component comprising a downhole tool.

18 . A method of transferring one or more torque between components of a rotating system, the method comprising:

applying a torque to a shaft in order to rotate the shaft about an axis of rotation;

transferring the torque to another component coupled to the shaft with a torque coupling assembly, the transferring the torque comprising:

applying the torque through a first ring coupled to the shaft, the first ring having one or more superhard coupling elements coupled to the first ring; and

transferring the torque from the first ring through the one or more superhard coupling elements coupled to the first ring to one or more superhard coupling elements coupled to a second ring that is coupled to the another component;

rotating the another component with the torque; and

supporting a thrust force applied between the first ring and the second ring with one or more additional superhard coupling elements.

19 . The method of claim 18 , further comprising tilting the first ring relative to the second ring while at least some of the one or more superhard coupling elements and the one or more additional superhard coupling elements remain in contact with one another.

20 . The method of claim 18 , further comprising passing the thrust force through a first contact surface of the one or more additional superhard coupling elements that is in contact with a second contact surface of the one or more additional superhard coupling elements, the first contact surface and the second contact surface being positioned in a direction transverse to the axis of rotation.