Treatment Ported Sub and Method of Use

Abstract

A ported sub integrates a seat for an object to land on to allow pressure buildup. A sleeve shifts with the ball and the seat to open ports that are screened. The openings feature hardened inserts to control wear from high velocity fluid. The interval is treated through such openings with treatment fluid that is relatively free of solids. The formation is produced through the same screened inserts that were used for treating. The sleeve can be releasably retained in the ports open position and can optionally be closed with well intervention such as with a shifting tool. The object can pass through the seat after sleeve shifting by disintegration or by using a segmented seat that opens enough to allow the object to pass. An array can be spaced throughout the zone for treating or fracturing and the sleeves shifted bottom up using different or same sized balls.

I claim: 
     
         1 . A treatment assembly for borehole access to a surrounding formation, comprising:
 at least one module comprising a housing having a passage therethrough and a movable sleeve to selectively open at least one wall opening without borehole intervention;   said wall opening further comprising a screen.   
     
     
         2 . The assembly of  claim 1 , wherein:
 said sleeve comprising a seat in said passage to accept an object thereon for selectively obstructing said passage for pressure buildup to shift said sleeve to selectively uncover said port.   
     
     
         3 . The assembly of  claim 2 , wherein:
 said object disintegrates to reopen said passage after said sleeve is shifted.   
     
     
         4 . The assembly of  claim 2 , wherein:
 said seat enlarges upon shifting said sleeve to allow said object to pass through said seat to reopen said passage.   
     
     
         5 . The assembly of  claim 1 , wherein:
 said sleeve is releasably secured after moving.   
     
     
         6 . The assembly of  claim 1 , wherein:
 said opening further comprises a screen.   
     
     
         7 . The assembly of  claim 1 , wherein:
 said opening comprises an hardened or carbide insert to resist erosion from flow therethrough.   
     
     
         8 . The assembly of  claim 1 , wherein:
 said at least one module comprises a plurality of modules disposed in an interval of the formation wherein said at least one opening in each said module comprises a plurality of openings wherein said plurality of openings in said modules are the same or different in size or in number.   
     
     
         9 . The assembly of  claim 8 , wherein:
 said openings a screened for production from the formation after treatment therethrough into the formation.   
     
     
         10 . The assembly of  claim 8 , wherein:
 said modules balance flow from the formation passing through said openings in said modules.   
     
     
         11 . The assembly of  claim 5 , wherein:
 said sleeve comprises a snap ring that enters a groove in said housing when moved to open said opening;   said sleeve further comprising a profile for engagement of a shifting tool to return said sleeve to a position with said port closed after said snap ring enters said groove.   
     
     
         12 . A treatment method for a producing zone accessible through a borehole, comprising;
 providing a plurality of modules in a tubular string adjacent the producing zone;   applying pressure in said string for sequentially moving a sleeve in said plurality of modules to open wall ports in said modules without borehole intervention;   sequentially pumping treatment fluid into said producing zone through said wall ports after each said sleeve is moved.   
     
     
         13 . The method of  claim 12 , comprising:
 providing a screen in said wall ports.   
     
     
         14 . The method of  claim 12 , comprising:
 balancing production flow from the producing zone through said wall ports.   
     
     
         15 . The method of  claim 12 , comprising:
 releasably retaining said sleeves away from said wall ports after initial movement away from said wall ports.   
     
     
         16 . The method of  claim 15 , comprising:
 moving at least one said sleeve back to close said wall ports in at least one module with a shifting tool.   
     
     
         17 . The method of  claim 12 , comprising:
 landing an object on a seat associated with said plurality of sleeves to close a passage therethrough;   applying pressure to said object on said seat to move said sleeve to open said wall ports.   
     
     
         18 . The method of  claim 17 , comprising:
 disintegrating the object or passing the object through said seat after movement of said sleeve to open said wall ports.   
     
     
         19 . The method of  claim 12 , comprising:
 treating the producing zone and subsequently producing the producing zone through the same wall ports.   
     
     
         20 . The method of  claim 19 , comprising:
 constructing said wall ports with hardened or carbide inserts with a screen in a flowpath therethrough.