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

Claim 17:
18. The drilling apparatus of claim 15, wherein the slide stability score is given as:, S
  =
  
    
      
        
          (
          
            
              
                sin
                ⁡
                
                  (
                  a
                  )
                
              
              +
              …
              +
              
                sin
                ⁡
                
                  (
                  z
                  )
                
              
            
            n
          
          )
        
        2
      
      +
      
        
          (
          
            
              
                cos
                ⁡
                
                  (
                  a
                  )
                
              
              +
              …
              +
              
                cos
                ⁡
                
                  (
                  z
                  )
                
              
            
            n
          
          )
        
        2
      
    
  

where S is the slide stability score, a is a first toolface angle in degrees, z is an nth toolface angle in degrees, and n is a number of measured toolface angles for the drilling operation.