Class Codes & Rates:

Code 6235 is applicable to drilling or redrilling oil or gas wells, and includes erection or dismantling of drilling rigs, formation fracturing, cementing and installation of casing when such operations are performed by employees of the drilling company. Cleaning or swabbing of a new well that has not yet been completed is included under Code 6235 whether performed by employees of the driller or by a specialist contractor.