Patent ID: 11859487
Assignee: NABORS DRILLING TECHNOLOGIES USA, INC.
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 3:
4. The method of claim 3, wherein the second amount of consistency of the toolface angle is given as:, S
  =
  
    
      
        
          (
          
            
              
                sin
                ⁡
                
                  (
                  a
                  )
                
              
              +
              
                sin
                ⁡
                
                  (
                  b
                  )
                
              
              +
              …
              +
              
                sin
                ⁡
                
                  (
                  z
                  )
                
              
            
            n
          
          )
        
        2
      
      +
      
        
          (
          
            
              
                cos
                ⁡
                
                  (
                  a
                  )
                
              
              +
              
                cos
                ⁡
                
                  (
                  b
                  )
                
              
              +
              …
              +
              
                cos
                ⁡
                
                  (
                  z
                  )
                
              
            
            n
          
          )
        
        2
      
    
  

where S is the second amount of consistency of the toolface angle, a is the measured first toolface angle of the BHA in degrees, b is the measured second toolface angle of the BHA in degrees, z is a measured nth toolface angle of the BHA in degrees, and n is the number of measured toolface angles for the drilling operation.