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- Nachgewiesen in: USPTO Patent Applications
- Sprachen: English
- Document Number: 20100038142
- Publication Date: February 18, 2010
- Appl. No: 12/553238
- Application Filed: September 03, 2009
- Assignees: Halliburton Energy Services, Inc. (Houston, TX, US)
- Claim: 1. An apparatus for drilling a wellbore that transverses a subterranean formation, the apparatus comprising: a drill string having an inner fluid passageway; a drill bit disposed at a distal end of the drill string and operable to rotate relative to at least a portion of the drill string; and a fluid motor disposed within the drill string and operable to rotate the drill bit in response to a circulating fluid received via the inner fluid passageway of the drill string, the fluid motor having a stator with (n) lobes and a rotor with (n−1) lobes, the stator having an inner surface formed from a first metal, the rotor having an outer surface formed from a second metal that is dissimilar to the first metal, thereby providing metal-to-metal contact during operation.
- Claim: 2. The apparatus as recited in claim 1 wherein the stator further comprises a stator housing and a stator sleeve, the stator housing and a stator sleeve formed from dissimilar metals.
- Claim: 3. The apparatus as recited in claim 1 wherein the stator further comprises a stator housing and a stator coating, the stator housing and the stator coating formed from dissimilar metals.
- Claim: 4. The apparatus as recited in claim 1 wherein the stator further comprises a stator housing, a stator sleeve and a stator coating, the stator housing and the stator sleeve formed from metal dissimilar to the stator coating.
- Claim: 5. The apparatus as recited in claim 1 wherein the rotor further comprises a solid metal rotor.
- Claim: 6. The apparatus as recited in claim 1 wherein the rotor further comprises rotor bore operable to provide a bypass for a portion of the circulating fluid.
- Claim: 7. The apparatus as recited in claim 1 wherein the rotor further comprises a rotor mandrel and a rotor sleeve, the rotor mandrel and the rotor sleeve formed from dissimilar metals.
- Claim: 8. The apparatus as recited in claim 1 wherein the rotor further comprises a rotor member and a rotor coating, the rotor member and the rotor coating formed from dissimilar metals.
- Claim: 9. The apparatus as recited in claim 1 wherein the rotor further comprises a rotor mandrel, a rotor sleeve and a rotor coating, the rotor mandrel and the rotor sleeve formed from metal dissimilar to the metal of the rotor coating.
- Claim: 10. A fluid motor for use in drilling a wellbore that transverses a subterranean formation to impart rotary motion to a drill bit in response to a circulating fluid, the fluid motor comprising: a helical stator with (n) lobes, the stator having an inner surface formed from a first metal; and a helical rotor with (n−1) lobes, the rotor having an outer surface formed from a second metal that is dissimilar to the first metal, thereby providing metal-to-metal contact during operation.
- Claim: 11. The fluid motor as recited in claim 10 wherein the stator further comprises a stator housing and a stator sleeve, the stator housing and a stator sleeve formed from dissimilar metals.
- Claim: 12. The fluid motor as recited in claim 10 wherein the stator further comprises a stator housing and a stator coating, the stator housing and the stator coating formed from dissimilar metals.
- Claim: 13. The fluid motor as recited in claim 10 wherein the stator further comprises a stator housing, a stator sleeve and a stator coating, the stator housing and the stator sleeve formed from metal dissimilar to the stator coating.
- Claim: 14. The fluid motor as recited in claim 10 wherein the rotor further comprises a solid metal rotor.
- Claim: 15. The fluid motor as recited in claim 10 wherein the rotor further comprises rotor bore operable to provide a bypass for a portion of the circulating fluid.
- Claim: 16. The fluid motor as recited in claim 10 wherein the rotor further comprises a rotor mandrel and a rotor sleeve, the rotor mandrel and the rotor sleeve formed from dissimilar metals.
- Claim: 17. The fluid motor as recited in claim 10 wherein the rotor further comprises a rotor member and a rotor coating, the rotor member and the rotor coating formed from dissimilar metals.
- Claim: 18. The fluid motor as recited in claim 10 wherein the rotor further comprises a rotor mandrel, a rotor sleeve and a rotor coating, the rotor mandrel and the rotor sleeve formed from metal dissimilar to the metal of the rotor coating.
- Claim: 19. A method for drilling a wellbore that transverses a subterranean formation, the method comprising: disposing a drill bit on a distal end of a drill string having an inner fluid passageway; positioning a fluid motor within the drill string, the fluid motor having a stator with (n) lobes and a rotor with (n−1) lobes, the stator having an inner surface formed from a first metal, the rotor having an outer surface formed from a second metal that is dissimilar to the first metal, providing metal-to-metal contact during operation; pumping a circulating fluid through the inner fluid passageway of the drill string and the fluid motor; converting the hydraulic energy of the circulating fluid to mechanical energy in the fluid motor causing rotation of the rotor; and rotating the drill bit in response to the rotation of the rotor.
- Claim: 20. The method as recited in claim 19 wherein positioning a fluid motor within the drill string further comprises positioning a fluid motor within the drill string including a stator having a stator housing and a stator sleeve, the stator housing and a stator sleeve formed from dissimilar metals.
- Claim: 21. The method as recited in claim 19 wherein positioning a fluid motor within the drill string further comprises positioning a fluid motor within the drill string including a stator having stator housing and a stator coating, the stator housing and the stator coating formed from dissimilar metals.
- Claim: 22. The method as recited in claim 19 wherein positioning a fluid motor within the drill string further comprises positioning a fluid motor within the drill string including a stator having stator housing, a stator sleeve and a stator coating, the stator housing and the stator sleeve formed from metal dissimilar to the stator coating.
- Claim: 23. The method as recited in claim 19 wherein positioning a fluid motor within the drill string further comprises positioning a fluid motor within the drill string including a solid metal rotor.
- Claim: 24. The method as recited in claim 19 wherein positioning a fluid motor within the drill string further comprises positioning a fluid motor within the drill string including a rotor having a rotor bore operable to provide a bypass for a portion of the circulating fluid.
- Claim: 25. The method as recited in claim 19 wherein positioning a fluid motor within the drill string further comprises positioning a fluid motor within the drill string including a rotor having a rotor mandrel and a rotor sleeve, the rotor mandrel and the rotor sleeve formed from dissimilar metals.
- Claim: 26. The method as recited in claim 19 wherein positioning a fluid motor within the drill string further comprises positioning a fluid motor within the drill string including a rotor having a rotor member and a rotor coating, the rotor member and the rotor coating formed from dissimilar metals.
- Claim: 27. The method as recited in claim 19 wherein positioning a fluid motor within the drill string further comprises positioning a fluid motor within the drill string including a rotor having a rotor mandrel, a rotor sleeve and a rotor coating, the rotor mandrel and the rotor sleeve formed from metal dissimilar to the metal of the rotor coating.
- Claim: 28. A fluid motor for use in drilling a wellbore that transverses a subterranean formation to impart rotary motion to a drill bit in response to a circulating fluid, the fluid motor comprising: a helical stator with (n) lobes, the stator having an inner surface; and a helical rotor with (n−1) lobes, the rotor having a rotor mandrel and a rotor sleeve, the rotor sleeve positioned exteriorly of at least a portion of the rotor mandrel, the rotor having an outer surface that contacts the inner surface of the stator as the rotor rotates and precesses within the stator.
- Claim: 29. The fluid motor as recited in claim 28 wherein the rotor mandrel and the rotor sleeve are formed from dissimilar materials.
- Claim: 30. The fluid motor as recited in claim 29 wherein the rotor mandrel is formed from a metal and the rotor sleeve is formed from a nanocomposite material.
- Claim: 31. The fluid motor as recited in claim 29 wherein the rotor mandrel and a rotor sleeve are formed from dissimilar metals.
- Claim: 32. The fluid motor as recited in claim 28 wherein the rotor further comprises a rotor coating, the rotor coating forming on the outer surface of the rotor sleeve.
- Claim: 33. The fluid motor as recited in claim 32 wherein the rotor mandrel and the rotor sleeve are formed from material that is dissimilar to the rotor coating.
- Claim: 34. The fluid motor as recited in claim 33 wherein the rotor mandrel and the rotor sleeve are formed from metal and the rotor coating is formed from a nanocomposite material.
- Claim: 35. The fluid motor as recited in claim 33 wherein the rotor mandrel and a rotor sleeve are formed from metal dissimilar to the rotor coating.
- Claim: 36. The fluid motor as recited in claim 28 wherein the outer surface of the rotor and the inner surface of the stator are formed from dissimilar materials.
- Claim: 37. The fluid motor as recited in claim 36 wherein the outer surface of the rotor and the inner surface of the stator are formed from dissimilar metals.
- Claim: 38. The fluid motor as recited in claim 36 wherein one of the outer surface of the rotor and the inner surface of the stator is formed from a nanocomposite material and the other of the outer surface of the rotor and the inner surface of the stator is formed from a metal.
- Claim: 39. A fluid motor for use in drilling a wellbore that transverses a subterranean formation to impart rotary motion to a drill bit in response to a circulating fluid, the fluid motor comprising: a helical stator with (n) lobes, the stator having a stator housing and a stator sleeve, the stator sleeve positioned interiorly of at least a portion of the stator housing, the stator having an inner surface; and a helical rotor with (n−1) lobes, the rotor having an outer surface that contacts the inner surface of the stator as the rotor rotates and precesses within the stator.
- Claim: 40. The fluid motor as recited in claim 39 wherein the stator housing and the stator sleeve are formed from dissimilar materials.
- Claim: 41. The fluid motor as recited in claim 40 wherein the stator housing is formed from a metal and the stator sleeve is formed from a nanocomposite material.
- Claim: 42. The fluid motor as recited in claim 40 wherein the stator housing and the stator sleeve are formed from dissimilar metals.
- Claim: 43. The fluid motor as recited in claim 39 wherein the outer surface of the rotor and the inner surface of the stator are formed from dissimilar materials.
- Claim: 44. The fluid motor as recited in claim 43 wherein the outer surface of the rotor and the inner surface of the stator are formed from dissimilar metals.
- Claim: 45. The fluid motor as recited in claim 43 wherein one of the outer surface of the rotor and the inner surface of the stator is formed from a nanocomposite material and the other of the outer surface of the rotor and the inner surface of the stator is formed from a metal.
- Current U.S. Class: 175/107
- Current International Class: 21; 21; 01
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