Bearing apparatuses, systems including same, and related methods
View Patent ↗A bearing apparatus is disclosed. Such a bearing apparatus may comprise a rotor including at least one bearing element mounted to the rotor and a stator including at least one bearing element mounted to the stator. At least one compliant member may be positioned between at least one selected bearing element of the at least one bearing element mounted to the rotor and the at least one bearing element mounted to the stator. Mechanical systems including such a bearing apparatus are disclosed, such as, for example, a motor for use in subterranean drilling. A method of assembling a bearing apparatus is disclosed. More specifically, a rotor and a stator each including at least one bearing element may be provided and a compressive force may be applied to the rotor and the stator to compress the bearing surfaces of the rotor and the stator against one another. Rotors and stators are disclosed.
1. A bearing apparatus comprising:
a first structure having a plurality of bearing elements defining a first bearing surface, at least one bearing element of the plurality of bearing elements of the first structure comprising a polycrystalline diamond table formed on a substrate;
a second structure having a plurality of bearing elements defining a second bearing surface, the first bearing surface and the second bearing surface configured to engage one another during relative displacement of the first structure and the second structure;
a first compliant member positioned between the first structure and the at least one bearing element of the first structure, the first compliant member configured to enable a selected magnitude of displacement of the at least one bearing element of the first structure in a first direction relative to the first structure; and
a second compliant member positioned between the first structure and the at least one bearing element of the first structure, the second compliant member configured to enable a selected magnitude of displacement of the at least one bearing element of the first structure in a second direction relative to the first structure, the second direction being different from the first direction.
2. The bearing apparatus of claim 1 , wherein at least one of the first compliant member and the second compliant member is configured to allow for a selected magnitude of variation of a surface of the at least one bearing element of the first structure between about ±2°.
3. The bearing apparatus of claim 1 , wherein at least one of the first compliant and the second compliant member comprises a biasing element.
4. The bearing apparatus of claim 3 , wherein the biasing element comprises a wave spring washer, a curved spring washer, or a Belleville spring washer.
5. The bearing apparatus of claim 3 , wherein the biasing element is configured to bias the at least one selected bearing element in at least one of the following directions: a radial direction, a circumferential direction, and a longitudinal direction.
6. The bearing apparatus of claim 1 , wherein at least one of the first compliant member and the second compliant member comprises a material having a modulus of elasticity of between about 5,000 ksi and about 30,000 ksi.
7. The bearing apparatus of claim 1 , wherein the first compliant member is configured to bias the at least one bearing of the first structure in at least one of a radial direction, a circumferential direction, and a longitudinal direction, and wherein the second compliant member is configured to bias the at least one bearing of the first structure in at least one other direction of the radial direction, the circumferential direction and the longitudinal direction.
8. The bearing apparatus of claim 1 , further comprising at least one other compliant member disposed between the at least one bearing element of the second structure, the at least one other compliant member configured to enable a selected magnitude of displacement of the at least one bearing member of the second structure relative to the first structure.
9. The bearing apparatus of claim 1 , wherein each of the first plurality of bearing elements and each of the second plurality of bearing elements comprise polycrystalline diamond.
10. The bearing apparatus of claim 1 , wherein:
the first structure includes a substantially ring-shaped body and wherein the second structure includes a substantially ring-shaped body;
the first structure includes a plurality of recesses configured to mount the first plurality of bearing elements; and
the second structure includes a plurality of recesses configured to mount the second plurality of bearing elements.
11. The bearing apparatus of claim 1 , wherein the first surface is substantially planar and the second surface is substantially planar.
12. The bearing apparatus of claim 1 , wherein the first bearing surface is substantially ring-shaped and the second bearing surface is substantially ring-shaped.
13. The bearing apparatus of claim 1 , wherein the first structure and the second structure are configured to collectively form a radial bearing apparatus.
14. A component for use in a bearing apparatus comprising:
a body;
a plurality of bearing elements mounted to the body, the plurality of bearing elements each comprising a polycrystalline diamond table formed on a substrate;
a plurality of compliant members positioned between the plurality of bearing elements and the body, each of the plurality of compliant members comprising a circumferential side wall and a substantially flat closed end defining a substantially cylindrical recess, each compliant member being configured to enable a selected magnitude of displacement of an associated bearing element of the plurality of bearing elements in a first direction relative to the body
and in a second direction relative to the body.
15. The component of claim 14 , wherein the body is substantially ring-shaped and includes a plurality of recesses configured to mount the plurality of bearing elements.
16. The component of claim 14 , wherein each of the plurality of bearing elements comprises a superhard material bonded to a substrate.
17. The component of claim 14 , wherein each of the plurality of bearing elements comprises a polycrystalline diamond table formed on a cemented tungsten carbide substrate.
18. The component of claim 14 , wherein each of the first plurality of compliant members comprises a biasing element.
19. The component of claim 14 , wherein the sidewall of each of the plurality of compliant members includes a plurality of openings formed therein.
20. The component of claim 14 , wherein each of the plurality of compliant members is configured to bias its respective bearing element of the plurality of bearing elements in at least one of the following directions: a radial direction and a longitudinal direction.
21. A bearing apparatus comprising:
a first structure having at least one bearing element defining a first bearing surface, the at least one bearing element of the first structure comprising a polycrystalline diamond table formed on a substrate;
a second structure having at least one bearing element defining a second bearing surface, the first bearing surface and the second bearing surface configured to engage one another during relative displacement of the first structure and the second structure; and
a compliant member positioned between the first structure and the at least one bearing element of the first structure, wherein the compliant member comprises a circumferential wall portion and a substantially flat closed end portion defining a substantially cylindrical recess for receipt of a portion of the at least one bearing element of the first structure, the compliant member configured to enable a selected magnitude of displacement of the at least one bearing element of the first structure in a first direction relative to the first structure and a selected magnitude of displacement of the at least one bearing element of the first structure in a second direction relative to the first structure, the second direction being different from the first direction.
22. A motor assembly for use in drilling subterranean formations, the motor assembly comprising:
a motor configured to apply a torque to a rotary drill bit, the motor operably coupled to a thrust bearing apparatus;
wherein the thrust bearing apparatus comprises:
a first structure having a plurality of bearing elements defining a first bearing surface, at least one bearing element of the plurality of bearing elements of the first structure comprising a polycrystalline diamond table formed on a substrate;
a second structure having a plurality of bearing elements defining a second bearing surface, the first bearing surface and the second bearing surface configured to engage one another during relative displacement of the first structure and the second structure;
a first compliant member positioned between the first structure and the at least one bearing element of the first structure, the first compliant member configured to enable a selected magnitude of displacement of the at least one bearing element of the first structure in a first direction relative to the first structure; and
a second compliant member positioned between the first structure and the at least one bearing element of the first structure, the second compliant member configured to enable a selected magnitude of displacement of the at least one bearing element of the first structure in a second direction relative to the first structure, the second direction being different from the first direction.