System and method for reduction of an effect of a tube wave

Abstract

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

1 . A tube wave reduction system for a borehole comprising:
 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.   
     
     
         2 . A tube wave reduction system as claimed in  claim 1  wherein the deformation region is a thin walled section of the tubular member. 
     
     
         3 . A tube wave reduction system as claimed in  claim 1  wherein the absorber is an elastic material. 
     
     
         4 . A tube wave reduction system as claimed in  claim 1  wherein the absorber is an inelastic material. 
     
     
         5 . A tube wave reduction system as claimed in  claim 1  wherein the absorber is loosely disposed about the one or more openings. 
     
     
         6 . A tube wave reduction system as claimed in  claim 1  wherein the absorber defines with the tubular member a chamber. 
     
     
         7 . A tube wave reduction system as claimed in  claim 6  wherein the chamber is in fluid communication with the one or more openings. 
     
     
         8 . A tube wave reduction system as claimed in  claim 1  wherein the absorber is a metal bellows. 
     
     
         9 . A tube wave reduction system as claimed in  claim 1  wherein one or more openings are radially oriented. 
     
     
         10 . A tube wave reduction system as claimed in  claim 1  wherein the deformable region is a deformable material disposed at the tubular member directly adjacent the through-passages. 
     
     
         11 . A tube wave reduction system comprising:
 a tubular member; and   one or more openings in the tubular member, the openings having a through-passage and a deformation region about the through-passage.   
     
     
         12 . A tube wave reduction system as claimed in  claim 11  wherein the system includes a microannulus in fluid communication with the one or more openings. 
     
     
         13 . A tube wave reduction system as claimed in  claim 12  wherein the microannulus is defined by the tubular member and another tubular member. 
     
     
         14 . A tube wave reduction system as claimed in  claim 13  wherein the another tubular member is radially outwardly disposed of the tubular member. 
     
     
         15 . A tube wave reduction system as claimed in  claim 1  wherein the absorber comprises a high-friction flow-through material. 
     
     
         16 . A tube wave reduction system as claimed in  claim 15  wherein the high-friction flow-through material is foam. 
     
     
         17 . A tube wave reduction system as claimed in  claim 15  wherein the absorber further comprises a material radially outwardly of the high-friction flow through-material. 
     
     
         18 . A method for reducing an effect of a tube wave comprising:
 burping at least pressure from a tube wave through one or more openings in a tubular member through which the tube wave propagates; and   absorbing energy from the tube wave thereby reducing a magnitude of the tube wave.   
     
     
         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.