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.