Kobe sub with inflow control, wellbore tubing string and method

Abstract

A kobe sub includes a kobe installed in a port of the sub, the kobe includes a cap portion accessible in the inner bore, a base mounted in the port and connected to the cap portion, a channel extending through the base and closed by the cap portion; and an inflow controller positioned to control fluid flowing through the channel toward the inner bore when the cap portion is opened; and a port opening tool for opening the cap portion. The kobe may be employed with a frac port.

1 . A kobe sub comprising: a tubular body connectable into a wellbore tubing string, the tubular body including a wall including an outer surface and an inner surface defining an inner bore and a port through the wall; a kobe installed in the port with a cap portion accessible in the inner bore, a base mounted in the port and connected to the cap portion, a channel extending through the base and closed by the cap portion; and an inflow controller positioned to control fluid flowing through the channel toward the inner bore when the cap portion is opened. 
     
     
         2 . The kobe sub of  claim 1  wherein the inflow controller is selected to filter oversize solids from the fluid flowing. 
     
     
         3 . The kobe sub of  claim 1  wherein the inflow controller is selected to control flow characteristics of the fluid flowing. 
     
     
         4 . The kobe sub of  claim 1  wherein the inflow controller is positioned in the channel. 
     
     
         5 . The kobe sub of  claim 1  wherein the inflow controller is a part of the channel. 
     
     
         6 . The kobe sub of  claim 1  further comprising a tool sized to move through the inner bore to contact and open the cap portion. 
     
     
         7 . The kobe sub of  claim 6  wherein the tool is a cutter sleeve installed in the inner bore. 
     
     
         8 . The kobe sub of  claim 1  further comprising an injection port through the wall and a closure for the injection port moveable between a closed position closing the injection port and an open position retracted from the injection port. 
     
     
         9 . A tubing string system for installation in a wellbore comprising: a tubular body including a tubular wall with an outer surface and an inner surface defining an inner bore and a port through the tubular wall; a kobe installed in the port with a cap portion accessible in the inner bore, a base mounted in the port and connected to the cap portion, a channel extending through the base and closed by the cap portion; and an inflow controller positioned to control fluid flowing through the channel toward the inner bore when the cap portion is opened; and a port opening tool for opening the cap portion. 
     
     
         10 . The tubing string system of  claim 9  wherein the inflow controller is selected to filter oversize solids from the fluid flowing. 
     
     
         11 . The tubing string system of  claim 9  wherein the inflow controller is selected to control flow characteristics of the fluid flowing. 
     
     
         12 . The tubing string system of  claim 9  wherein the inflow controller is positioned in the channel. 
     
     
         13 . The tubing string system of  claim 9  wherein the inflow controller is a part of the channel. 
     
     
         14 . The tubing string system of  claim 9  wherein the port opening tool is a cutter sleeve installed in the inner bore. 
     
     
         15 . The tubing string system of  claim 9  further comprising an injection port through the wall and a closure for the injection port moveable between a closed position closing the injection port and an open position retracted from the injection port. 
     
     
         16 . The tubing string system of  claim 15  wherein the closure is moveable to the open position without also opening the cap portion. 
     
     
         17 . The tubing string system of  claim 9  further comprising a first packer positioned uphole from the port and a second packer positioned downhole from the port. 
     
     
         18 . The tubing string system of  claim 9  further comprising a second stage of the tubing string positioned uphole from the first packer and including a second port through the tubular wall; a second kobe installed in the second port with a second cap portion accessible in the inner bore, a second base mounted in the second port and connected to the second cap portion, a second channel extending through the second base and closed by the second cap portion; and a second inflow controller positioned to control fluid flowing through the second channel toward the inner bore when the second cap portion is opened. 
     
     
         19 . The tubing string system of  claim 18  further comprising in the second stage: a second injection port through the wall and a second closure for the second injection port moveable between a closed position closing the injection port and an open position retracted from the injection port. 
     
     
         20 . A method for forming a fluid channel through a tubing string wall, the method comprising: installing a tubing string in a wellbore, the tubing string including a tubular wall including an outer surface and an inner surface defining an open inner bore and a port through the wall; a kobe installed in the port with a cap portion accessible in the inner bore, a base mounted in the port and connected to the cap portion, a channel extending through the base and closed by the cap portion; and an inflow controller positioned to control fluid flowing through the channel toward the inner bore when the cap portion is opened; manipulating a port opening tool in the inner bore to open the cap portion and to allow fluid flow through the inflow controller and the channel into the inner bore. 
     
     
         21 . The method of  claim 20  wherein manipulating includes running a mill through the inner bore. 
     
     
         22 . The method of  claim 20  wherein manipulating includes running a cutter sleeve through the inner bore. 
     
     
         23 . The method of  claim 20  wherein manipulating includes running a sleeve shifting tool through the inner bore. 
     
     
         24 . The method of  claim 20  wherein manipulating also closes an injection port in the tubing string. 
     
     
         25 . The method of  claim 20  further comprising opening an injection port in the tubing string and injecting wellbore treatment fluid therethrough to treat the formation. 
     
     
         26 . The method of  claim 20  further comprising pressuring up the string before the manipulating the port opening tool. 
     
     
         27 . A method for fluid treatment of a borehole, the method comprising: running a tubing string into a wellbore to a desired position for treating the wellbore; opening a frac port by application of a force to a closure for the frac port; injecting stimulating fluids through the frac port; closing the frac port; opening a fluid inflow control port by opening an inner cap over the fluid inflow control port; and permitting fluid to pass from the wellbore into the tool through the fluid inflow control port. 
     
     
         28 . The method of  claim 27  wherein opening a fluid inflow control port includes running a mill through the inner bore. 
     
     
         29 . The method of  claim 27  wherein opening a fluid inflow control port includes running a cutter sleeve through the inner bore. 
     
     
         30 . The method of  claim 27  wherein opening a fluid inflow control port includes running a sleeve shifting tool through the inner bore. 
     
     
         31 . The method of  claim 27  wherein opening a fluid inflow control port also closes an injection port in the tubing string. 
     
     
         32 . The method of  claim 27  further comprising pressuring up the string before opening the frac port.