This standard specifies the basic requirements for the use and maintenance of petroleum well workover rigs. This standard applies to land tire-type oil workover rigs.
SY/T 6117-2003 history
2016SY/T 6117-2016 Use and maintenance of oil drilling rigs and workover rigs
2010SY/T 6117-2010 The operating and maintenance of petroleum workover rig
2003SY/T 6117-2003 The operating and maintenance of petroleum workover rig
1970SY/T 6117-1994 The operating and maintenance of petroleum workover rig