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A fracturing/gravel packing tool with variable direction and exposure exit ports. A system for delivering an erosive flow into a subterranean well includes a port displacing in the well while the erosive flow passes through the port. Various displacement devices may be used in the system to displace

A fracturing/gravel packing tool with variable direction and exposure exit ports. A system for delivering an erosive flow into a subterranean well includes a port displacing in the well while the erosive flow passes through the port. Various displacement devices may be used in the system to displace the port.

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1. A system for delivering an erosive flow into a subterranean well, the system comprising: a port displacing in the well while the erosive flow passes through the port; anda displacement device which displaces the port in the well while the erosive flow passes through the port, the displacement dev

1. A system for delivering an erosive flow into a subterranean well, the system comprising: a port displacing in the well while the erosive flow passes through the port; anda displacement device which displaces the port in the well while the erosive flow passes through the port, the displacement device being interconnected in a tubular string between the port and an anchoring device securing the tubular string in the well. 2. The system of claim 1, wherein the port is formed in a sidewall of the tubular string. 3. The system of claim 1, wherein the port is an exit port for delivering the erosive flow into the well external to the port. 4. The system of claim 1, wherein the displacement device includes a ratchet mechanism for displacing the port. 5. The system of claim 1, wherein the displacement device includes a hydraulic metering device. 6. The system of claim 1, wherein the displacement device displaces the port in response to compression in the tubular string. 7. The system of claim 1, wherein the displacement device displaces the port in response to tension in the tubular string. 8. The system of claim 1, wherein the displacement device includes a piston which displaces the port in response to a pressure differential across the piston. 9. The system of claim 1, wherein the displacement device displaces the port in response to alteration of pressure in the device. 10. The system of claim 1, wherein the displacement device displaces the port in response to alteration of a parameter of the erosive flow. 11. The system of claim 1, wherein the displacement device displaces the port in response to erosion of a structure in the well. 12. The system of claim 1, wherein the displacement device includes a series of release devices, each release device releasing to permit displacement of the port when a predetermined force is applied to the release device. 13. The system of claim 1, wherein the displacement device includes a helical structure for helically displacing the port. 14. The system of claim 1, wherein the displacement device includes an electric motor. 15. The system of claim 1, wherein the displacement device includes a hydraulic motor. 16. The system of claim 1, wherein the displacement device includes an electromagnetic actuator. 17. The system of claim 1, wherein the displacement device produces relative displacement between the tubular string and the anchoring device. 18. The system of claim 17, wherein the displacement device includes a hydraulic metering device for regulating displacement of the tubular string relative to the anchoring device. 19. The system of claim 18, wherein the hydraulic metering device is included in a service tool interconnected in the tubular string. 20. The system of claim 1, wherein the anchoring device includes at least one collet securing the tubular string within an outer tubular assembly. 21. The system of claim 1, wherein the anchoring device secures the tubular string to a wellbore of the well. 22. The system of claim 1, wherein the anchoring device comprises engagement between a service tool and a packer assembly in the well. 23. The system of claim 1, further comprising a swivel interconnected in the tubular string, the port being positioned between the swivel and the anchoring device. 24. The system of claim 1, wherein the port displaces longitudinally in the well while the erosive flow passes through the port. 25. The system of claim 1, wherein the port displaces rotationally in the well while the erosive flow passes through the port. 26. The system of claim 1, wherein the port displaces both rotationally and longitudinally in the well while the erosive flow passes through the port. 27. The system of claim 1, wherein the erosive flow passes from the port to an annulus in the well external to a screen. 28. The system of claim 1, wherein the port is positioned within a tubular structure in the well, and wherein displacement of the port displaces an erosive impingement of the erosive flow on the tubular structure. 29. A system for delivering an erosive flow into a subterranean well, the system comprising: a displacement device which displaces a port in the well while the erosive flow passes through the port, the erosive flow comprising at least one of a proppant and gravel, wherein the displacement device displaces the port in response to compression in a tubular string. 30. The system of claim 29, wherein the tubular string is compressed at a location between the port and an anchoring device securing the tubular string in the well. 31. The system of claim 29, wherein the tubular string is compressed at a travel joint positioned between the port and an anchoring device securing the tubular string in the well. 32. A system for delivering an erosive flow into a subterranean well, the system comprising: a displacement device which displaces a port in the well while the erosive flow passes through the port, the erosive flow comprising at least one of a proppant and gravel, wherein the displacement device displaces the port in response to tension in a tubular string, and wherein the tubular string is elongated at a location between the port and an anchoring device securing the tubular string in the well. 33. A system for delivering an erosive flow into a subterranean well, the system comprising: a displacement device which displaces a port in the well while the erosive flow passes through the port, the erosive flow comprising at least one of a proppant and gravel, wherein the displacement device displaces the port in response to tension in a tubular string, and wherein the tubular string is elongated at a travel joint positioned between the port and an anchoring device securing the tubular string in the well. 34. A system for delivering an erosive flow into a subterranean well, the system comprising: a displacement device which displaces a port in the well while the erosive flow passes through the port, the erosive flow comprising at least one of a proppant and gravel, wherein the displacement device produces relative displacement between a tubular string and an anchoring device securing the tubular string in the well. 35. The system of claim 34, wherein the displacement device includes a hydraulic metering device for regulating displacement of the tubular string relative to the anchoring device. 36. The system of claim 35, wherein the hydraulic metering device is included in a service tool interconnected in the tubular string. 37. A system for delivering an erosive flow into a subterranean well, the system comprising: a displacement device which displaces a port in the well while the erosive flow passes through the port, andwherein the displacement device is interconnected in a tubular string between the port and an anchoring device securing the tubular string in the well. 38. The system of claim 37, wherein the anchoring device includes at least one collet securing the tubular string within an outer tubular assembly. 39. The system of claim 38, wherein the collet engages a spaced apart series of profiles. 40. The system of claim 39, wherein there are multiple collets, and wherein an increased number of the collets engage each profile in succession. 41. The system of claim 39, wherein each profile in succession is configured to increase a force required to release the collet from the profile as compared to a force required to release the collet from a prior profile. 42. The system of claim 41, wherein each profile in succession has a more steeply inclined shoulder thereon as compared to a shoulder on a prior profile. 43. The system of claim 37, wherein the anchoring device secures the tubular string to a wellbore of the well. 44. The system of claim 37, wherein the anchoring device comprises engagement between a service tool and a packer assembly in the well. 45. The system of claim 37, further comprising a swivel interconnected in the tubular string, the port being positioned between the swivel and the anchoring device. 46. A method of delivering an erosive flow into a subterranean well, the method comprising the steps of: passing the erosive flow through a port in the well;displacing the port while the erosive flow passes through the port, and while the erosive flow passes to an exterior of a well screen in the well, thereby delivering a particulate slurry to the exterior of the well screen, wherein the displacing step further comprises compressing a tubular string to displace the port, and wherein the passing and displacing steps are performed without expanding any tubular structure through which the erosive flow passes. 47. A method of delivering an erosive flow into a subterranean well, the method comprising the steps of: passing the erosive flow through a port in the well;displacing the port while the erosive flow passes through the port, and while the erosive flow passes to an exterior of a well screen in the well, thereby delivering a particulate slurry to the exterior of the well screen, wherein the displacing step further comprises elongating a tubular string to displace the port, and wherein the passing and displacing steps are performed without expanding any tubular structure through which the erosive flow passes. 48. A method of delivering an erosive flow into a subterranean well, the method comprising the steps of: passing the erosive flow through a port in the well;displacing the port while the erosive flow passes through the port, and while the erosive flow passes to an exterior of a well screen in the well, thereby delivering a particulate slurry to the exterior of the well screen, wherein the displacing step further comprises actuating a displacement device interconnected in a tubular string between the port and an anchoring device, and wherein the passing and displacing steps are performed without expanding any tubular structure through which the erosive flow passes; andsecuring the tubular string in the well utilizing the anchoring device. 49. The method of claim 48, wherein the securing step further comprises securing the tubular string within an outer tubular assembly utilizing a locking mechanism of the anchoring device. 50. The method of claim 48, wherein the securing step further comprises securing the tubular string to a wellbore of the well. 51. The method of claim 48, wherein the securing step further comprises engaging a service tool with a packer assembly in the well. 52. The method of claim 48, further comprising the step of interconnecting a swivel in the tubular string, the port being positioned between the swivel and the anchoring device.