2007SY/T 5172-2007 Specifications for trajectory control in straight holes
2002SY/T 5088-2002 Wellbore quality evaluation items and calculation methods
1996SY/T 5172-1996 Design method of BHA in vertical well
SY/T 5088-2017 Drilling Well Quality Control Specifications has been changed from SY/T 5172-2007 Specifications for trajectory control in straight holes.