A bearing assembly for use in an apparatus having a housing and a shaft which is rotatably connected with the housing. A shaft extension extends from the interior of the housing at a first housing end. The shaft extension defines a first bearing shaft surface. The bearing assembly includes a first t
A bearing assembly for use in an apparatus having a housing and a shaft which is rotatably connected with the housing. A shaft extension extends from the interior of the housing at a first housing end. The shaft extension defines a first bearing shaft surface. The bearing assembly includes a first thrust bearing for transferring a first axial load between the shaft and the housing. The first thrust bearing is located axially between the first housing end and the first bearing shaft surface.
대표청구항▼
1. A bearing assembly for use in an apparatus comprising a housing and a shaft, wherein the shaft has a shaft axis, wherein the shaft is rotatably connected with the housing, wherein the housing defines an interior of the housing, an exterior of the housing and a first housing end, wherein the shaft
1. A bearing assembly for use in an apparatus comprising a housing and a shaft, wherein the shaft has a shaft axis, wherein the shaft is rotatably connected with the housing, wherein the housing defines an interior of the housing, an exterior of the housing and a first housing end, wherein the shaft is comprised of a shaft extension which extends from the interior of the housing at the first housing end, and wherein the shaft extension defines a first bearing shaft surface, the bearing assembly comprising a first thrust bearing for transferring a first axial load between the shaft and the housing, wherein the first thrust bearing is located axially between the first housing end and the first bearing shaft surface, wherein the first thrust bearing is a rolling element bearing, and wherein the first thrust bearing is further comprised of a lubricant selected from the group consisting of a lubricating oil and a grease. 2. The bearing assembly as claimed in claim 1 wherein the first housing end has an inner dimension, wherein the first thrust bearing has an outer dimension, and wherein the outer dimension of the first thrust bearing is greater than the inner dimension of the first housing end. 3. The bearing assembly as claimed in claim 1 wherein the apparatus is an apparatus for use in drilling a borehole. 4. The bearing assembly as claimed in claim 1 wherein the housing is a drilling motor housing, wherein the drilling motor housing has a distal end and a proximal end, and wherein the distal end of the drilling motor housing is the first housing end. 5. The bearing assembly as claimed in claim 1 wherein the housing is a non-rotating sleeve, wherein the non-rotating sleeve has a distal end and a proximal end, and wherein the proximal end of the non-rotating sleeve is the first housing end. 6. A bearing assembly for use in an apparatus comprising a housing and a shaft, wherein the shaft has a shaft axis, wherein the shaft is rotatably connected with the housing, wherein the housing defines an interior of the housing, an exterior of the housing and a first housing end, wherein the shaft is comprised of a shaft extension which extends from the interior of the housing at the first housing end, and wherein the shaft extension defines a first bearing shaft surface, the bearing assembly comprising a first thrust bearing for transferring a first axial load between the shaft and the housing, wherein the first thrust bearing is located axially between the first housing end and the first bearing shaft surface, wherein the first thrust bearing is a rolling element bearing, wherein the rolling element bearing is comprised of a first thrust bearing housing component connected with the housing, a first thrust bearing shaft component connected with the shaft and a first thrust bearing rolling element component positioned between the first thrust bearing housing component and the first thrust bearing shaft component, and wherein the first thrust bearing is further comprised of a shroud for at least partially isolating the first thrust bearing from an environment at the exterior of the housing by providing at least a partial seal of the first thrust bearing. 7. The bearing assembly as claimed in claim 6 wherein the first thrust bearing rolling element component is comprised of a plurality of rolling elements suspended in a rolling element cage. 8. The bearing assembly as claimed in claim 7 wherein each of the plurality of rolling elements is comprised of a roller. 9. The bearing assembly as claimed in claim 6 wherein the first thrust bearing is further comprised of a lubricant selected from the group consisting of a lubricating oil and a grease. 10. The bearing assembly as claimed in claim 6 wherein one of the first thrust bearing housing component and the first thrust bearing shaft component is comprised of the shroud. 11. The bearing assembly as claimed in claim 10 wherein the first thrust bearing shaft component is comprised of the shroud, wherein the shroud is comprised of a tubular extension, and wherein the tubular extension extends towards the exterior of the housing to at least the first thrust bearing housing component in order to provide at least a partial seal around the first thrust bearing. 12. The bearing assembly as claimed in claim 11 wherein the first thrust bearing is further comprised of a lubricant, wherein the lubricant is a grease. 13. The bearing assembly as claimed in claim 11 wherein the shroud fully isolates the first thrust bearing from the environment at the exterior of the housing. 14. The bearing assembly as claimed in claim 13 wherein the tubular extension extends to the exterior of the housing and wherein the shroud is further comprised of a shroud seal positioned between the tubular extension and the exterior of the housing to substantially seal between the first thrust bearing shaft component and the exterior of the housing. 15. The bearing assembly as claimed in claim 14 wherein the first thrust bearing is further comprised of a lubricant, wherein the lubricant is a lubricating oil. 16. The bearing assembly as claimed in claim 15 wherein the first thrust bearing is in fluid communication with an isolated section of the housing filled with the lubricating oil. 17. The bearing assembly as claimed in claim 6 wherein the first housing end has an inner dimension, wherein the first thrust bearing has an outer dimension, and wherein the outer dimension of the first thrust bearing is greater than the inner dimension of the first housing end. 18. The bearing assembly as claimed in claim 6 wherein the apparatus is an apparatus for use in drilling a borehole. 19. The bearing assembly as claimed in claim 6 wherein the housing is a drilling motor housing, wherein the drilling motor housing has a distal end and a proximal end, and wherein the distal end of the drilling motor housing is the first housing end. 20. The bearing assembly as claimed in claim 6 wherein the housing is a non-rotating sleeve, wherein the non-rotating sleeve has a distal end and a proximal end, and wherein the proximal end of the non-rotating sleeve is the first housing end. 21. A bearing assembly for use in an apparatus comprising a housing and a shaft, wherein the shaft has a shaft axis, wherein the shaft is rotatably connected with the housing, wherein the housing defines an interior of the housing, an exterior of the housing and a first housing end, wherein the shaft is comprised of a shaft extension which extends from the interior of the housing at the first housing end, and wherein the shaft extension defines a first bearing shaft surface, the bearing assembly comprising: (a) a first thrust bearing for transferring a first axial load between the shaft and the housing, wherein the first thrust bearing is located axially between the first housing end and the first bearing shaft surface;(b) a second thrust bearing for transferring a second axial load between the shaft and the housing, wherein the second thrust bearing is comprised of a preloading mechanism; and(c) a drive shaft catcher for limiting an amount of relative axial movement between the housing and the shaft. 22. The bearing assembly as claimed in claim 21 wherein the first housing end has an inner dimension, wherein the first thrust bearing has an outer dimension, and wherein the outer dimension of the first thrust bearing is greater than the inner dimension of the first housing end. 23. The bearing assembly as claimed in claim 21 wherein the second thrust bearing is located within the interior of the housing. 24. The bearing assembly as claimed in claim 21 wherein the second thrust bearing is comprised of a second thrust bearing housing component connected with the housing and a second thrust bearing shaft component connected with the shaft, and wherein the preloading mechanism urges the second thrust bearing shaft component toward the second thrust bearing housing component. 25. The bearing assembly as claimed in claim 24 wherein the preloading mechanism is comprised of a plurality of spring elements. 26. The bearing assembly as claimed in claim 21 wherein the drive shaft catcher is comprised of a protrusion on an external surface of the shaft configured to engage a complementary shoulder defined by the interior of the housing. 27. The bearing assembly as claimed in claim 21 wherein the apparatus is an apparatus for use in drilling a borehole. 28. The bearing assembly as claimed in claim 21 wherein the housing is a drilling motor housing, wherein the drilling motor housing has a distal end and a proximal end, and wherein the distal end of the drilling motor housing is the first housing end. 29. The bearing assembly as claimed in claim 21 wherein the housing is a non-rotating sleeve, wherein the non-rotating sleeve has a distal end and a proximal end, and wherein the proximal end of the non-rotating sleeve is the first housing end. 30. A bearing assembly for use in an apparatus comprising a housing and a shaft, wherein the shaft has a shaft axis, wherein the shaft is rotatably connected with the housing, wherein the housing defines an interior of the housing, an exterior of the housing and a first housing end, wherein the shaft is comprised of a shaft extension which extends from the interior of the housing at the first housing end, and wherein the shaft extension defines a first bearing shaft surface, the bearing assembly comprising a first thrust bearing for transferring a first axial load between the shaft and the housing, wherein the first thrust bearing is located axially between the first housing end and the first bearing shaft surface, and wherein the first thrust bearing is a curved bearing. 31. The bearing assembly as claimed in claim 30 wherein the first housing end has an inner dimension, wherein the first thrust bearing has an outer dimension, and wherein the outer dimension of the first thrust bearing is greater than the inner dimension of the first housing end. 32. The bearing assembly as claimed in claim 30 wherein the curved bearing is comprised of a first thrust bearing housing component connected with the housing and a first thrust bearing shaft component connected with the shaft, wherein each of the first thrust bearing housing component and the first thrust bearing shaft component includes a complementary curved bearing surface. 33. The bearing assembly as claimed in claim 32 wherein each of the complementary curved bearing surfaces is substantially spherical. 34. The bearing assembly as claimed in claim 32 wherein an annular space is defined between the interior of the housing and the shaft, wherein the annular space communicates with the first thrust bearing and wherein the first thrust bearing is lubricated by a drilling fluid passing through the annular space. 35. The bearing assembly as claimed in claim 34 wherein the first thrust bearing is adapted to permit the passage of the drilling fluid from the annular space to the exterior of the housing between the first thrust bearing housing component and the first thrust bearing shaft component. 36. The bearing assembly as claimed in claim 30 wherein the curved bearing is a curved plain bearing. 37. The bearing assembly as claimed in claim 36 wherein the curved bearing surface of at least one of the first thrust bearing housing component and the first thrust bearing shaft component defines at least one groove to facilitate the passage of the drilling fluid. 38. The bearing assembly as claimed in claim 37 wherein the at least one groove is a spiral groove. 39. The bearing assembly as claimed in claim 30 wherein the apparatus is an apparatus for use in drilling a borehole. 40. The bearing assembly as claimed in claim 30 wherein the housing is a drilling motor housing, wherein the drilling motor housing has a distal end and a proximal end, and wherein the distal end of the drilling motor housing is the first housing end. 41. The bearing assembly as claimed in claim 30 wherein the housing is a non-rotating sleeve, wherein the non-rotating sleeve has a distal end and a proximal end, and wherein the proximal end of the non-rotating sleeve is the first housing end.
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이 특허에 인용된 특허 (74)
Crase Gary M. (Cypress CA), Adjustable bearing assembly.
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Ide Russell D. (P.O. Box 744 ; 641 Arnold Rd. Coventry RI 02816), Hydrodynamic bearings having beam mounted bearing pads and sealed bearing assemblies including the same.
Paris E. Blair ; Joseph L. Ficken ; Daniel J. Richards, Integrated transmitter surveying while boring entrenching powering device for the continuation of a guided bore hole.
Chen, Chen-Kang D.; Gaynor, Thomas M.; Gleitman, Daniel D.; Hardin, Jr., John R.; Walker, Colin; Rao, M. Vikram; Boulton, Roger, Steerable drilling system and method.
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