Tenn. Comp. R. & Regs. 0400-52-07-.04
The production, oil, or flow string, is that casing used for the purpose of segregating the zone from which production is obtained and affording a means of communication between such zone and the surface. If production casing is used in a vertical well, the operator shall cement the production casing at a minimum of 100 feet into the intermediate casing and extend the cementing across the producing formation, unless the casing is set on a packer or set and cemented above the production zone. Alternative casing and cementing designs may be approved by the Supervisor upon request if adequate technical justification can be made. Casing shall have an external collapse pressure rating to handle cement design from total depth to surface. The operator shall use cement with 500 psi compressive strength and have a minimum 8 hour wait, or until cement has adequately set. The operator shall present all cement and casing designs on a specifications sheet with Permit Application for approval. A copy of cement tickets shall be kept on location to be viewed by the inspector until the drill rig is removed. In unknown or over pressured conditions a 5000 psi rating on casing shall apply. The operator shall attach a copy of all cement tickets to the well history tickets and shall include all volumes and pressures of job from start to finish. A description of the work done under this rule shall be reported to the Supervisor on Well History, Work Summary, and Completion or Recompletion Report (Form CN-0221) within 60 days after completion.
Tenn. Comp. R. & Regs. 0400-52-07-.04
Authority: T.C.A §§ 60-1-201 et seq., and 4-5-201 et seq.