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A tube wave reduction system for a borehole includes a tubular member; one or more openings in the tubular member, the one or more openings having a through-passage and a deformation region surrounding the through-passage; and an absorber in fluid communication with the one or more openings. Also in

A tube wave reduction system for a borehole includes a tubular member; one or more openings in the tubular member, the one or more openings having a through-passage and a deformation region surrounding the through-passage; and an absorber in fluid communication with the one or more openings. Also included is a method for reducing an effect of a tube wave.

대표청구항 ▼

1. A tube wave reduction system for a borehole comprising: a tubular member comprising a wall and an open inside diameter that offers no restriction to axial flow therethrough and has a structure conducive to propagation of a tube wave;one or more openings in the wall of the tubular member, the one

1. A tube wave reduction system for a borehole comprising: a tubular member comprising a wall and an open inside diameter that offers no restriction to axial flow therethrough and has a structure conducive to propagation of a tube wave;one or more openings in the wall of the tubular member, the one or more openings being configured to maintain a relatively smaller through-passage at ambient pressures and change to a relatively larger through passage responsive to a pressure higher within the tubular member than without the tubular member when a tube wave arrives at the one or more openings during use; anda deformation region of the wall of the tubular member adjacent one or more through-passages of the one or more openings, the deformation region being configured to deform in response to the arrival of the tube wave to facilitate the relatively larger through-passage and resiliently return to the relatively smaller through-passage after dissipation of the tube wave. 2. A tube wave reduction system as claimed in claim 1 wherein the deformation region tapers to a thin walled section of the tubular member adjacent an opening of the one or more openings. 3. A tube wave reduction system as claimed in claim 1 wherein the deformation region is a material difference of the tubular member. 4. A tube wave reduction system as claimed in claim 1 wherein the deformation region is an elastomer. 5. A tube wave reduction system as claimed in claim 1 wherein the deformation region includes a lead in configuration. 6. A tube wave reduction system as claimed in claim 1 wherein the system passes fluid axially during ambient pressure operation and passes at least fluid pressure radially during pressure events exceeding ambient pressure for the system. 7. A tube wave reduction system as claimed in claim 1 wherein the system further includes an absorber. 8. A tube wave reduction system as claimed in claim 7 wherein the absorber is an elastic material. 9. A tube wave reduction system as claimed in claim 7 wherein the absorber is an inelastic material. 10. A tube wave reduction system as claimed in claim 7 wherein the absorber is loosely disposed about the one or more openings. 11. A tube wave reduction system as claimed in claim 7 wherein the absorber defines with the tubular member a chamber. 12. A tube wave reduction system as claimed in claim 7 wherein the absorber is a metal bellows. 13. A tube wave reduction system as claimed in claim 7 wherein the absorber comprises a high-friction flow-through material. 14. A tube wave reduction system as claimed in claim 13 wherein the high-friction flow-through material is foam. 15. A tube wave reduction system as claimed in claim 13 wherein the absorber further comprises a material radially outwardly of the high-friction flow through-material. 16. A tube wave reduction system as claimed in claim 1 wherein one or more openings are radially oriented. 17. A tube wave reduction system as claimed in claim 1 wherein the system includes a microannulus in fluid communication with the one or more openings. 18. A method for protecting equipment comprising: containing fluid within the system claimed in claim 1;burping at least pressure from a tube wave occurring within the system through the one or more openings in the tubular member by deforming the deformation region adjacent the one or more through-passages of the one or more openings to change the through-passages from the relatively small through-passage to the larger through-passage in response to the arrival of the tube wave wherein a pressure spike attendant the tube wave facilitates deformation of the deformation region to the relatively larger through-passage;absorbing energy from the tube wave by conveying pressure from the tube wave through the one or more openings thereby reducing a magnitude of the tube wave, andresiliently returning the deformation region to the relatively smaller through-passage after the absorbing of the tube wave; andreducing an effect of the tube wave propagating along the tubular member. 19. A method for reducing an effect of a tube wave as claimed in claim 18 wherein the absorbing includes expanding a material in fluid communication with the one or more openings, the material defining a chamber with the tubular member. 20. A method for reducing an effect of a tube wave as claimed in claim 18 wherein the absorbing includes flowing fluid through a high-friction flow-through material in fluid communication with the one or more openings.