International Association of Drilling Contractors

Name	Link
Canadian Petroleum Safety Council	http://www.psc.ca
Canadian Petroleum Safety Council Industry Recommended Practice (IRP) Critical Sour Underbalanced Drilling	http://www.psc.ca/irps_gtsws/manuals/pdffiles/irp6_final_2004.pdf
Alberta Energy and Utilities Board (EUB)	http://www.eub.gov.ab.ca
EUB Interim Directive ID 94-3 Underbalanced Drilling	http://www.eub.gov.ab.ca/BBS/ils/ids/id94-03.htm
Petroleum Safety Authority Norway	http://www.ptil.no/English/Frontpage.htm
Under Balanced Drilling HSE Forum	http://www.ubdhseforum.com/