Pulse based perf and wash system and method

Abstract

A perf and wash system ( 300 ) for plugging a casing and wellbore, the perf and wash system including a cleaning tool ( 310 ) having at least one nozzle ( 312 ) making a first angle with a longitudinal axis of the system; a perforating gun assembly ( 320 ) having at least one shaped charge ( 510 ) making a second angle with the longitudinal axis; and a plug ( 334 ) connected with a first end to the cleaning tool ( 310 ) and with a second end, opposite to the first end, to the perforating gun assembly ( 320 ). The first angle is substantially equal to the second angle and the first and second angles are different than 90 degrees.

What is claimed is: 
     
         1 . A perf and wash system ( 300 ) for plugging a casing and wellbore, the perf and wash system comprising:
 a cleaning tool ( 310 ) having at least one nozzle ( 312 ) making a first angle with a longitudinal axis of the system;   a perforating gun assembly ( 320 ) having at least one shaped charge ( 510 ) making a second angle with the longitudinal axis; and   a plug ( 334 ) connected with a first end to the cleaning tool ( 310 ) and with a second end, opposite to the first end, to the perforating gun assembly ( 320 ),   wherein the first angle is substantially equal to the second angle and the second angles are different than 90 degrees.   
     
     
         2 . The system of  claim 1 , wherein the cleaning tool is configured to generate a pulsing water jet through the at least one nozzle. 
     
     
         3 . The system of  claim 1 , wherein the first and second angles are both acute or both obtuse. 
     
     
         4 . The system of  claim 1 , wherein the at least one nozzle of the cleaning tool includes a first set of nozzles having the first angle and a second set of nozzles having a third angle, which is different from the first angle. 
     
     
         5 . The system of  claim 4 , wherein the at least one shaped charge of the perforating gun assembly includes a first set of shaped charges having the second angle, and a second set of shaped charges having a fourth angle, different from the second angle. 
     
     
         6 . The system of  claim 5 , wherein the second angle is substantially equal to the fourth angle. 
     
     
         7 . The system of  claim 6 , wherein one of the first and third angles is acute and smother one of the first and third angles is obtuse. 
     
     
         8 . The system of  claim 5 , wherein the at least one nozzle includes a third set of nozzles that are perpendicular to the longitudinal axis. 
     
     
         9 . The system of  claim 8 , wherein the at least one shaped charge includes a third set of charges that are perpendicular to the longitudinal axis. 
     
     
         10 . The system of  claim 1 , wherein the plug is configured to be set to close the casing and to detach from the cleaning tool. 
     
     
         11 . The system of  claim 1 , further comprising:
 first and second bypassing valves that are located to sandwich the cleaning tool; and   an automatic gun release module located between the plug and the perforating gun assembly and configured to release the perforating gun assembly.   
     
     
         12 . A perf and wash system ( 300 ) for plugging a casing, the perf and wash system comprising:
 a cleaning tool ( 310 ) having at least one nozzle ( 312 );   a perforating gun assembly ( 320 ) having at least one shaped charge ( 510 ); and   a plug ( 334 ) connected with a first end to the cleaning tool ( 310 ) and with a second end, opposite to the first end, to the perforating gun assembly ( 320 ),   wherein the cleaning tool is configured to generate a pulsing water jet through the at least one nozzle.   
     
     
         13 . The system of  claim 12 , wherein the at least one nozzle makes a first angle with a longitudinal axis of the system, the at least one shaped charge makes a second angle with the longitudinal axis, the first angle is equal to the second angle, and the first and second angles are different than 90 degrees. 
     
     
         14 . The system of  claim 13 , wherein the at least one nozzle of the cleaning tool includes a first set of nozzles having the first angle and a second set of nozzles having a third angle, which is different from the first angle, and the at least one shaped charge of the perforating gun assembly includes a first set of shaped charges having the second angle, and a second set of shaped charges having a fourth angle, different from the second angle. 
     
     
         15 . The system of  claim 14 , wherein the third angle is substantially equal to the fourth angle. 
     
     
         16 . A method for cleaning a casing in a well, the method comprising: selecting ( 1100 ) a perforating gun assembly ( 320 ) having at least one shaped charge ( 510 ) making a first angle with a longitudinal axis of the casing;
 selecting ( 1102 ) a cleaning tool ( 310 ) having at least one nozzle ( 312 ) making substantially the first angle with the longitudinal axis, wherein the cleaning tool is configured to generate a pulsed water jet ( 316 ) through the at least one nozzle ( 312 );   connecting ( 1104 ) a plug ( 334 ) with a first end to the cleaning tool ( 310 ) and with a second end, opposite to the first end, to the perforating gun assembly ( 320 ), to form a perf and wash system ( 300 );   lowering ( 1106 ) the perf and wash system ( 300 ) into the casing; and cleaning ( 1108 ) the casing with the pulsed water jet ( 316 ) of the cleaning tool ( 310 ).   
     
     
         17 . The system of  claim 16 , further comprising:
 activating the perforating gun system to make holes into the casing; and   releasing the perforating gun system from the perf and wash system.   
     
     
         18 . The method of  claim 17 , wherein the holes are convergent or divergent. 
     
     
         19 . The method of  claim 17 , wherein the holes are inclined downward relative to the casing and gravel is packed into the holes. 
     
     
         20 . The method of  claim 17 , further comprising:
 setting the plug downstream from the holes made by the perforating gun system to close the casing; and   separating the plug from the cleaning tool.