This standard specifies the classification, model representation and main radial dimensions of drilling coring tools. This standard applies to oil and gas drilling coring tools.
SY/T 6197-1996 history
2016SY/T 5347-2016 Code of practice for drilling coring operation
2005SY/T 5347-2005 Specification of drilling coring operation
1996SY/T 6197-1996 Classification and Model Representation of Drilling Coring Tools
SY/T 6197-1996 Classification and Model Representation of Drilling Coring Tools was changed to SY/T 5347-2005 Specification of drilling coring operation .