System and method for treating a borehole

Abstract

A method for treating a borehole or formation including creating a hydrodynamic barrier in a selected location, treating a target in the borehole with a treatment fluid, and maintaining or directing the treatment fluid with the hydrodynamic barrier. A system for treating a borehole or formation. A barrier system including a rotatable member, a tubular disposed in radially spaced relationship to the rotatable member and defining an annular space between the tubular and rotatable member, the rotatable member configured to rotate at an RPM relative to the tubular sufficient to establish circular fluid movement in the annular space.

1 . A method for treating a borehole or formation comprising:
 creating a hydrodynamic barrier in a selected location;   treating a target in the borehole with a treatment fluid; and   maintaining or directing the treatment fluid with the hydrodynamic barrier.   
     
     
         2 . The method as claimed in  claim 1  wherein the creating is by rotating a member of a work string relative to another tubular form spaced therefrom at a sufficient RPM to establish circular fluid movement in an annular space defined between the rotating member and the another tubular form. 
     
     
         3 . The method as claimed in  claim 2  wherein the rotating RPM is proportional to a radial dimension of the annulus. 
     
     
         4 . The method as claimed in  claim 1  wherein the treating is fracturing. 
     
     
         5 . The method as claimed in  claim 1  wherein the treating is acidizing. 
     
     
         6 . The method as claimed in  claim 1  wherein the hydrodynamic barrier restricts fluid movement past the barrier. 
     
     
         7 . The method as claimed in  claim 1  wherein the maintaining or directing is containing a pressure differential. 
     
     
         8 . The method as claimed in  claim 7  wherein the pressure differential is 1000 psi-3000 psi. 
     
     
         9 . The method as claimed in  claim 1  wherein the pressure differential is 10,000-15,000 psi. 
     
     
         10 . A system for treating a borehole or formation comprising:
 a rotatable member;   a tubular disposed in radially spaced relationship to the rotatable member and defining an annular space between the tubular and rotatable member, the rotatable member configured to rotate at an RPM relative to the tubular sufficient to establish circular fluid movement creating a barrier in the annular space; and   a treatment fluid volume in operable communication with the barrier.   
     
     
         11 . A barrier system comprising:
 a rotatable member;   a tubular disposed in radially spaced relationship to the rotatable member and defining an annular space between the tubular and rotatable member, the rotatable member configured to rotate at an RPM relative to the tubular sufficient to establish circular fluid movement in the annular space.   
     
     
         12 . The barrier system as claimed in  claim 11  wherein the rotatable member is radially inwardly disposed of the tubular. 
     
     
         13 . The barrier system as claimed in  claim 11  wherein the system further comprises a motor connected to the rotatable member. 
     
     
         14 . The barrier system as claimed in  claim 13  wherein the motor is a mud motor. 
     
     
         15 . The barrier system as claimed in  claim 11  wherein the motor is an electric motor. 
     
     
         16 . The barrier system as claimed in  claim 11  wherein the system includes a gear train and a motor configured to produce rotation in a range of up to 10,000 RPM. 
     
     
         17 . The barrier system as claimed in  claim 11  wherein the circular fluid movement is a hydrodynamic barrier, in use.