Cutter forces and wear severity determination for a drill bit for drilling a wellbore

Abstract

A method comprises determining an input drill bit response to a drill bit for drilling a wellbore based on at least one operational attribute during drilling of the wellbore and predicting a cutter wear severity of at least one cutter of the drill bit during drilling of the wellbore based on the input drill bit response.

1 . A method comprising:
 determining an input drill bit response to a drill bit for drilling a wellbore based on at least one operational attribute during drilling of the wellbore; and   predicting a cutter wear severity of at least one cutter of the drill bit during drilling of the wellbore based on the input drill bit response.   
     
     
         2 . The method of  claim 1 , further comprising:
 determining cutter forces on the at least one cutter based on the input drill bit energy;   determining a cutter power of the at least one cutter based on the cutter forces;   determining a cutter energy of the at least one cutter based on the cutter power;   determining a cutter wear volume of the at least one cutter based on the cutter energy; and   determining a cutter wear depth of the at least one cutter based on the cutter wear volume,   wherein predicting the cutter wear severity of the at least one cutter comprises predicting the cutter wear severity based on the cutter wear depth.   
     
     
         3 . The method of  claim 1 , further comprising:
 determining whether the cutter wear severity of the at least one cutter of the drill bit exceeds a wear severity threshold; and   in response to the cutter wear severity of the at least one cutter of the drill bit exceeds a wear severity threshold,
 stopping drilling of the wellbore; 
 tripping the drill string to a surface of the wellbore; 
 replacing the drill bit with a new drill bit; and 
 lowering the drill string. 
   
     
     
         4 . The method of  claim 1 , further comprising:
 adjusting the at least one operational attribute to reduce cutter wear severity during the drilling of the wellbore.   
     
     
         5 . The method of  claim 1 , wherein the bit response comprises at least one of a weight on bit, a torque on bit, a rate of penetration, or a rotation speed of the drill bit during drilling of the wellbore. 
     
     
         6 . A non-transitory, computer-readable medium having instructions stored thereon that are executable by a processor, the instructions comprising:
 instructions to determine an input drill bit response to a drill bit while drilling a wellbore based on at least one operational attribute during drilling of the wellbore; and   instructions to predict a cutter wear severity of at least one cutter of the drill bit during drilling of the wellbore based on the input drill bit response.   
     
     
         7 . The non-transitory, computer-readable medium of  claim 6 , wherein the instructions comprise,
 instructions to determine cutter forces on the at least one cutter based on the input drill bit response, wherein the instructions to predict the cutter wear severity of at least one cutter of the drill bit during drilling of the wellbore is based on the cutter forces on the at least one cutter; and   instructions to determine a cutter power of the at least one cutter based on the cutter forces, wherein the instructions to predict the cutter wear severity of at least one cutter of the drill bit during drilling of the wellbore is based on the cutter power of the at least one cutter.   
     
     
         8 . The non-transitory, computer-readable medium of  claim 7 , further comprising:
 instructions to determine a cutter energy of the at least one cutter based on the cutter forces,   wherein the instructions to predict the cutter wear severity of at least one cutter of the drill bit during drilling of the wellbore is based on the cutter energy of the at least one cutter.   
     
     
         9 . The non-transitory, computer-readable medium of  claim 8 , further comprising:
 instructions to determine a cutter wear volume of the at least one cutter based on the cutter forces,   wherein the instructions to predict the cutter wear severity of at least one cutter of the drill bit during drilling of the wellbore is based on the cutter wear volume of the at least one cutter.   
     
     
         10 . The non-transitory, computer-readable medium of  claim 9 , further comprising:
 instructions to determine a cutter wear depth of the at least one cutter based on the cutter forces,   wherein the instructions to predict the cutter wear severity of at least one cutter of the drill bit during drilling of the wellbore is based on the cutter wear depth of the at least one cutter.   
     
     
         11 . The non-transitory, computer-readable medium of  claim 6 , further comprising:
 instructions to determine whether the cutter wear severity of the at least one cutter of the drill bit exceeds a wear severity threshold; and   in response to the cutter wear severity of the at least one cutter of the drill bit exceeds a wear severity threshold,
 instructions to stop drilling of the wellbore; 
 instructions to trip the drill string to a surface of the wellbore to replace the drill bit with a new drill bit; and 
 instructions to resume drilling of the wellbore using the new drill bit after lowering the drill string back down into the wellbore. 
   
     
     
         12 . The non-transitory, computer-readable medium of  claim 6 , further comprising:
 instructions to adjust the at least one operational attribute to reduce cutter wear severity during the drilling of the wellbore.   
     
     
         13 . The non-transitory, computer-readable medium of  claim 6 , wherein the operational attribute comprises at least one of a weight on bit, a torque on bit, a rate of penetration, or a rotation speed of the drill bit during drilling of the wellbore. 
     
     
         14 . An apparatus comprising:
 a processor; and   a computer-readable medium having instructions stored thereon that are
 executable by the processor to cause the processor to,
 determine an input drill bit response to a drill bit while drilling a wellbore based on at least one operational attribute during drilling of the wellbore; and 
 predict a cutter wear severity of at least one cutter of the drill bit during drilling of the wellbore based on the input drill bit response. 
 
   
     
     
         15 . The apparatus of  claim 14 , wherein the instructions comprise instructions executable by the processor to cause the processor to,
 determine cutter forces on the at least one cutter based on the input drill bit response,   wherein the instructions executable by the processor to cause the processor to predict the cutter wear severity of at least one cutter of the drill bit during drilling of the wellbore is based on the cutter forces on the at least one cutter.   
     
     
         16 . The apparatus of  claim 15 , wherein the instructions comprise instructions executable by the processor to cause the processor to,
 determine a cutter power of the at least one cutter based on the cutter forces,   wherein the instructions executable by the processor to cause the processor to predict the cutter wear severity of at least one cutter of the drill bit during drilling of the wellbore is based on the cutter power of the at least one cutter.   
     
     
         17 . The apparatus of  claim 16 , wherein the instructions comprise instructions executable by the processor to cause the processor to,
 determine a cutter energy of the at least one cutter based on the cutter forces, wherein the instructions executable by the processor to cause the processor to predict the cutter wear severity of at least one cutter of the drill bit during drilling of the wellbore is based on the cutter energy of the at least one cutter;   determine a cutter wear volume of the at least one cutter based on the cutter forces, wherein the instructions executable by the processor to cause the processor to predict the cutter wear severity of at least one cutter of the drill bit during drilling of the wellbore is based on the cutter wear volume of the at least one cutter; and   determine a cutter wear depth of the at least one cutter based on the cutter forces, wherein the instructions executable by the processor to cause the processor to predict the cutter wear severity of at least one cutter of the drill bit during drilling of the wellbore is based on the cutter wear depth of the at least one cutter.   
     
     
         18 . The apparatus of  claim 14 , wherein the instructions comprise instructions executable by the processor to cause the processor to,
 determine whether the cutter wear severity of the at least one cutter of the drill bit exceeds a wear severity threshold; and   in response to the cutter wear severity of the at least one cutter of the drill bit exceeds a wear severity threshold,
 stop drilling of the wellbore; 
 trip the drill string to a surface of the wellbore to replace the drill bit with a new drill bit; and 
 resume drilling of the wellbore using the new drill bit after lowering the drill string back down into the wellbore. 
   
     
     
         19 . The apparatus of  claim 14 , wherein the instructions comprise instructions executable by the processor to cause the processor to,
 adjust the at least one operational attribute to reduce cutter wear severity during the drilling of the wellbore.   
     
     
         20 . The apparatus of  claim 14 , wherein the operational attribute comprises at least one of a weight on bit, a torque on bit, a rate of penetration, or a rotation speed of the drill bit during drilling of the wellbore.