Coile, Zachery. "McCain calls for more offshore drilling." San Francisco Chronicle. June 17, 2008. (Sept. 2, 2008)http://www.sfgate.com/cgi-bin/article.cgi?f=/c/a/2008/06/17/MNR111A4M8.DTL&type=politicsFreudenrich, Craig. "How Oil Drilling Works." HowStuffWorks.com. April 12, 2001. (Sept. 2, 2008)https://science.howstuffworks.com/oil-drilling.Hale, Briony. "The ups and downs of life offshore." BBC News. June 18, 2002. (Sept. 2, 2008)http://news.bbc.co.uk/2/hi/business/2041404.stm"Happy Landings." The BP Magazine. 2008. (Sept. 2, 2008)http://www.bp.com/sectiongenericarticle.do?categoryId=9023145&contentId=7043392Holing, Dwight. "Coastal Alert." Island Press. 1990."Jackup building price surges on strong demand." Offshore Magazine. March 12, 2007. (Sept. 5, 2008)http://www.offshore-mag.com/display_article/286837/120/ARTCL/none/VESSL/Jackup-building-price-surges-on-strong-demand/Kelly, David. "Oil Rig, 9 Miles Offshore, Is Home and Work Above the Sea." Los Angeles Times. May 27, 2001. (Sept. 2, 2008)http://articles.latimes.com/2001/may/27/local/me-3292Little, Amanda Griscom. "Pumped Up: Chevron Drills Down 30,000 Feet to Tap Oil-Rich Gulf of Mexico." Wired. Aug. 21, 2007. (Sept. 2, 2008)http://www.wired.com/print/cars/energy/magazine/15-09/mf_jackrigMacalister, Terry. "More than half of North Sea oil rigs fail safety checks." Nov. 22, 2007. (Aug. 28, 2008)http://www.guardian.co.uk/business/2007/nov/22/oil"Norwegian Billionaires' Oil-Rig Building Spree Raises Glut Risk." Bloomberg News. Oct. 11, 2005. (Sept. 5, 2008)http://www.bloomberg.com/apps/news?pid=nifea&&sid=a0Vcxph3Y2ZU"Offshore Drilling." NaturalGas.org. 2004. (Sept. 2, 2008)http://www.naturalgas.org/naturalgas/extraction_offshore.asp"Offshore Drilling." World Petroleum Council. March 13, 2003. (Sept. 2, 2008)http://www.world-petroleum.org/education/offdrill/index.html"Petroleum production." Britannica Online Encyclopædia. 2008. (Sept. 2, 2008)http://www.britannica.com/EBchecked/topic/1357080/petroleum-production"Petroleum Technologies Timeline." National Academy of Engineering. 2008. (Sept. 2, 2008)http://www.greatachievements.org/?id=3675"Rank Order - oil - consumption." CIA World Fact Book. Aug. 21, 2008. (Aug. 27, 2008)https://www.cia.gov/library/publications/the-world-factbook/rankorder/2174rank.htmlSchlumberger Energy Glossary. 2023. (Sept. 2, 2008) "Spar Platform." GlobalSecurity.org. Nov. 11, 2006. (Sept. 2, 2008)http://www.globalsecurity.org/military/systems/ship/platform-spar.htmTotten, George E. "A Timeline of Highlights From the Histories of ASTM Committee DO2 and the Petroleum Industry." ASTM International. 2007 (Sept. 4, 2008)http://www.astm.org/COMMIT/D02/to1899_index.html"Tallest Buildings." SkyScraperCenter.com. 2023. , Early offshore drilling occurred in water less than 300 feet deep. Oil and natural gas drilling rigs now operate in water as deep as two miles. Offshore oil and natural gas production is much more expensive than onshore (land-based) production., Offshore drilling is a mechanical process where a wellbore is drilled below the seabed. It is typically carried out in order to explore for and subsequently extract petroleum that lies in rock formations beneath the seabed..