43 CFR 3264.13 - What drilling and operational records must I maintain for each well?
You must keep the following information for each well, and make it available for BLM to inspect, upon request:
(a) A complete and accurate drilling log, in chronological order;
(b) All other logs;
(c) Water or steam analyses;
(d) Hydrologic or heat flow tests;
(e) Directional surveys;
(f) A complete log of all subsequent well operations, such as cementing, perforating, acidizing, and well cleanouts; and
(g) Any other information regarding the well that could affect its status.