U.S. Code of Federal Regulations

Regulations most recently checked for updates: Sep 17, 2025

All TitlesTitle 30Chapter IIPart 250Subpart D - Subpart D—Oil and Gas Drilling Operations

GENERAL REQUIREMENTS
§ 250.400 - General requirements.
§§ 250.401-250.403 - §[Reserved]
§ 250.404 - What are the requirements for the crown block?
§ 250.405 - What are the safety requirements for diesel engines used on a drilling rig?
§ 250.406 - [Reserved]
§ 250.407 - What tests must I conduct to determine reservoir characteristics?
§ 250.408 - May I use alternative procedures or equipment during drilling operations?
§ 250.409 - May I obtain departures from these drilling requirements?

APPLYING FOR A PERMIT TO DRILL
§ 250.410 - How do I obtain approval to drill a well?
§ 250.411 - What information must I submit with my application?
§ 250.412 - What requirements must the location plat meet?
§ 250.413 - What must my description of well drilling design criteria address?
§ 250.414 - What must my drilling prognosis include?
§ 250.415 - What must my casing and cementing programs include?
§ 250.416 - What must I include in the diverter description?
§ 250.417 - [Reserved]
§ 250.418 - What additional information must I submit with my APD?

CASING AND CEMENTING REQUIREMENTS
§ 250.420 - What well casing and cementing requirements must I meet?
§ 250.421 - What are the casing and cementing requirements by type of casing string?
§ 250.422 - When may I resume drilling after cementing?
§ 250.423 - What are the requirements for casing and liner installation?
§§ 250.424-250.426 - §[Reserved]
§ 250.427 - What are the requirements for pressure integrity tests?
§ 250.428 - What must I do in certain cementing and casing situations?

DIVERTER SYSTEM REQUIREMENTS
§ 250.430 - When must I install a diverter system?
§ 250.431 - What are the diverter design and installation requirements?
§ 250.432 - How do I obtain a departure to diverter design and installation requirements?
§ 250.433 -
§ 250.434 - What are the recordkeeping requirements for diverter actuations and tests?
§§ 250.440-250.451 - §[Reserved]
§ 250.452 - What are the real-time monitoring requirements for Arctic OCS exploratory drilling operations?

DRILLING FLUID REQUIREMENTS
§ 250.455 - What are the general requirements for a drilling fluid program?
§ 250.456 - What safe practices must the drilling fluid program follow?
§ 250.457 - What equipment is required to monitor drilling fluids?
§ 250.458 - What quantities of drilling fluids are required?
§ 250.459 - What are the safety requirements for drilling fluid-handling areas?

OTHER DRILLING REQUIREMENTS
§ 250.460 - What are the requirements for conducting a well test?
§ 250.461 - What are the requirements for directional and inclination surveys?
§ 250.462 - What are the source control, containment, and collocated equipment requirements?
§ 250.463 - Who establishes field drilling rules?

APPLYING FOR A PERMIT TO MODIFY AND WELL RECORDS
§ 250.465 - When must I submit an Application for Permit to Modify (APM) or an End of Operations Report to BSEE?
§§ 250.466-250.469 - §[Reserved]

ADDITIONAL ARCTIC OCS REQUIREMENTS
§ 250.470 - What additional information must I submit with my APD for Arctic OCS exploratory drilling operations?
§ 250.471 - What are the requirements for Arctic OCS source control and containment?
§ 250.472 - What are the relief rig requirements for the Arctic OCS?
§ 250.473 - What must I do to protect health, safety, property, and theenvironment while operating on the Arctic OCS?

HYDROGEN SULFIDE
§ 250.490 - Hydrogen sulfide.
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