by Bruce Wells | Jan 24, 2025 | Petroleum History Almanac
Offshore technologies advanced after Howard Hughes and CIA raised a lost Soviet submarine in 1970s.
Launched in 1972, the Glomar Explorer left behind two remarkable offshore exploration histories — a clandestine submarine recovery vessel and the world’s most advanced deep-water drill ship. The CIA’s former “ocean mining” vessel ended its long offshore career in 2015 at a Chinese scrapyard.
Considered the pioneer of modern drill ships, the Glomar Explorer was decades ahead of its time working at extreme depths for the U.S. offshore petroleum industry. Relaunched in 1998 as an offshore technological phenomenon, the original Glomar Explorer had been constructed as a top-secret project of the Central Intelligence Agency.
The Hughes Glomar Explorer, a custom-built “magnesium mining vessel” for the CIA’s Project Azorian, which in 1974 recovered part of a Soviet submarine that had sunk off Hawaii in 1968. Photo courtesy American Society of Mechanical Engineers.
CIA Project Azorian began soon after the U.S.S.R. ballistic missile submarine K-129 mysteriously sank somewhere in the deep Pacific Ocean northeast of Hawaii on March 8, 1968. The wreckage of the lost sub could never be found — or so it seemed.
Unknown to the Soviets, sophisticated U.S. Navy sonar technology would locate the K-129 on the seabed at a depth of 16,500 feet. But a salvage operation more than three miles deep was impossible with any known technology (see ROV – Swimming Socket Wrench).
The K-129 sinking presented the CIA with such an espionage opportunity that the agency convinced President Richard Nixon to approve a secret operation to attempt raising the vessel — intact — from the ocean floor.
Secretive billionaire Howard Hughes Jr. of Hughes Tool Company joined the mission, code-named Project Azorian (mistakenly called Project Jennifer in news media accounts).
The recovery effort would involve years of deception: Deep ocean mining would be the cover story for construction of the Hughes Glomar Explorer.
Hughes “Ocean Mining”
Scientists and venture capitalists had long seen potential in ocean mining, but when Hughes appeared to take on the challenge, the world took notice. The well-publicized plan described harvesting magnesium nodules from record depths with a custom-built ship that would push engineering technology to new limits, typical of Hughes’ style. The story spread.
But from concept to launch, the Hughes Glomar Explorer had one purpose: Raise the sunken Soviet Golf-II class submarine from 1968 — and any ballistic missiles. Construction began in 1972 by Sun Shipbuilding and Drydock Company in a Delaware River facility south of Philadelphia. Hughes’ $350 million (about $261 billion in 2024) high-tech ship was ostensibly built to mine the sea floor.
On August 8, 1974, the “magnesium mining vessel” secretly raised part of the 2,000-ton K-129 through a hidden well opening in the hull and a “claw” of mechanically articulated fingers that used sea water as a hydraulic fluid. News about Project Azorian leaked within six months.
Seymour Hersh of the Los Angeles Times revealed the clandestine project on February 7, 1974. An investigative reporter, he had won the Pulitzer Prize in 1970 for exposing the My Lai massacre.
On February 7, 1974, the Los Angeles Times broke the story: “CIA Salvage Ship Brought Up Part Of Soviet Sub Lost In 1968, Failed To Raise Atom Missiles.”
The L.A. Times article by Pulitzer-Prize winning journalist Seymour Hersh ended the high-tech vessel’s spying career. The government transferred Hughes Glomar Explorer to the Navy in 1976 for an extensive $2 million preparation for storage in dry dock. With its CIA days over, Hughes Glomar Explorer spent almost two decades mothballed at Suisun Bay, California.
Pioneer Drill Ship
London-based Global Marine had converted the CIA vessel for commercial use. The company hired Electronic Power Design of Houston, Texas, to work on the advanced electrical system. After almost 20 years in storage, the condition of equipment inside the ship surprised Electronic Power Design CEO John Janik.
“Everything was just as the CIA had left it,” Janik explained, “down to the bowls on the counter and the knives hanging in the kitchen. Even though all the systems were intact, this was by no means an ordinary ship.”
Janik noted in 2015 for The Maritime Executive that his company’s retrofit was “a tough job because the ship’s wiring was unlike anything we had ever seen before,” although preservation had been helped by nitrogen pumped into the ship’s interior for two decades.
Conversion work later included a Mobile, Alabama, shipyard adding a derrick, drilling equipment, and 11 positioning thrusters capable of a combined 35,200 horsepower. Completed in 1998 as the world’s largest drillship, Glomar Explorer began a long-term lease from the U.S. Navy to Global Marine Drilling for $1 million per year.
The advanced drilling ship spent the next 17 years working in deep-water sites around the globe, including Africa’s Nigerian delta, the Black Sea, offshore Angola, Indonesia, Malta, Singapore, and Malaysia.
Following a series of corporate mergers, Glomar Explorer became part of the largest offshore drilling contractor, the Swiss company Transocean Ltd. When it entered that company’s fleet, the ship was renamed GSF Explorer, and in 2013 was re-flagged from Houston to the South Pacific’s Port Vila in Vanuatu.
The former top-secret CIA vessel Glomar Explorer began a record-setting career in 1998 as a technologically advanced deep-water drill ship. Photo courtesy American Society of Mechanical Engineers.
When GSF Explorer arrived at the Chinese ship breaker’s yard in 2015, many offshore industry trade publications took notice of the ship’s demise after years of exceptional deep drilling service. The ship was “decades ahead of its time and the pioneer of all modern drill ships,” declared the Electronic Power Design CEO in The Maritime Executive article.
“It broke all the records for working at unimaginable depths and should be remembered as a technological phenomenon,” Janik concluded.
Soon after the former Glomar Explorer was sold for scrap, Tom Speight of the engineering firm O’Reilly, Talbot & Okun, reflected in a company post, “This is a shame, not only because of the ship’s nearly unbelievable history, but also because in 2006 the American Society of Mechanical Engineers designated this technologically remarkable ship a historic mechanical engineering landmark.”
The ASME award ceremony, which took place on July 20, 2006, in Houston, included members of the original engineering team and ship’s crew among the attendees. Past President Keith Thayer noted the important contributions the ship made to the development of mechanical engineering and innovations in offshore drilling technology.
The historic ship’s name will forever be linked to the ship’s CIA brief service during the Cold War. For many veteran journalists, the agency’s chronic response to inquiries, “We can neither confirm nor deny,” is still known as the “Glomar response.”
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Recommended Reading: The CIA’s Greatest Covert Operation: Inside the Daring Mission to Recover a Nuclear-Armed Soviet Sub (2012); Project Azorian: The CIA and the Raising of the K-129 (2012). Your Amazon purchase benefits the American Oil & Gas Historical Society. As an Amazon Associate, AOGHS earns a commission from qualifying purchases.
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The American Oil & Gas Historical Society (AOGHS) preserves U.S. petroleum history. Please become an AOGHS annual supporter and help maintain this energy education website and expand historical research. For more information, contact bawells@aoghs.org. Copyright © 2025 Bruce A. Wells. All rights reserved.
Citation Information – Article Title: “Secret Offshore History of Drill Ship Glomar Explorer.” Authors: B.A. Wells and K.L. Wells. Website Name: American Oil & Gas Historical Society. URL: https://aoghs.org/oil-almanac/secret-offshore-history-of-the-glomar-explorer. Last Updated: January 26, 2025. Original Published Date: February 8, 2020.
by Bruce Wells | Jul 15, 2024 | This Week in Petroleum History
July 16, 1907 – Drilling Pioneer patents Casing Shoe –
After drilling wells in Kern River oilfields, R. Carlton “Carl” Baker (1872-1957) of Coalinga, California, patented the Baker well-casing shoe. His cable-tool innovation at the bottom of the casing string increased efficiency and reliability for ensuring oil flowed through a well.
Reuben Carlton “Carl” Baker standing next to Baker Casing Shoes in 1914. Photo courtesy the now closed R.C. Baker Memorial Museum.
Baker, who in 1903 founded the Coalinga Oil Company, by 1913 had established the Baker Casing Shoe Company (renamed Baker Tools two years later). The inventor opened his first manufacturing plant in Coalinga before moving headquarters to Los Angeles in the 1930s. The company became Baker International in 1976 and Baker Hughes after a 1987 merger with Hughes Tool Company.
Learn more in Carl Baker and Howard Hughes.
July 16, 1926 – Oil Discovery launches Greater Seminole Area Boom
Three years after an oil well was completed near Bowlegs, Oklahoma, a gusher south of Seminole revealed the true oil potential of Seminole County. The Fixico No. 1 well penetrated the prolific Wilcox Sands formation at a depth of 4,073 feet.
“Oil workers working on lowered traveling block” at well in Seminole oilfield, August 1939. Photo by Russell Lee (1903-1986) courtesy Library of Congress.
Drilled by R.F. Garland and his Independent Oil Company, the well was among more than 50 Greater Seminole Area oil reservoirs discovered; six were giants that produced more than one million barrels of oil each. With the Oklahoma City oilfield added in 1928, Oklahoma became the largest supplier of oil in the world by 1935.
Learn more in Seminole Oil Boom.
July 16, 1935 – Oklahoma Publisher produces First Parking Meter
As the booming Oklahoma City oilfield added to the congestion of cars downtown, the world’s first parking meter was installed at the corner of First Street and Robinson Avenue. Carl C. Magee, publisher of the Oklahoma News, designed the Park-O-Meter No. 1, today preserved by the Oklahoma Historical Society.
Oklahoma college students helped Carl Magee design the Park-O-Meter No. 1. Photo courtesy Oklahoma Historical Society.
“The meter charged five cents for one hour of parking, and naturally citizens hated it, viewing it as a tax for owning a car,” noted historian Josh Miller in 2012. “But retailers loved the meter, as it encouraged a quick turnover of customers.”
Park-O-Meters were manufactured by MacNick Company of Tulsa, maker of timing devices used to explode nitroglycerin in wells — and oilfield competitor of the Zero Hour Bomb Company (see Zebco Reel Oilfield History).
July 16, 1969 – Kerosene fuels launch of Saturn V Moon Rocket
A 19th-century petroleum product made America’s 1969 moon landing possible. Kerosene powered the first-stage rocket engines of the Saturn V when it launched the Apollo 11 mission on July 16. Four days later, astronaut Neil Armstrong announced, “Houston, Tranquility Base here. The Eagle has landed.”
Powered by five first-stage engines fueled by “rocket grade” kerosene, the Saturn V was the tallest, heaviest and most powerful rocket ever built until the SpaceX Starship. Photos courtesy NASA.
Five engines of the Saturn V’s first stage burned “Rocket Grade Kerosene Propellant” at 2,230 gallons per second — generating almost eight million pounds of thrust. The fuel was a highly refined kerosene RP-1 (Rocket Propellant-1) that began as “coal oil” for lamps.
When Canadian Abraham Gesner (1797-1864) first refined the lamp fuel from coal in 1846, he coined the term kerosene from the Greek word keros (wax), but many people called it “coal oil.” A highly refined version of his product now fuels rockets, including the SpaceX Falcon 9.
Learn more in Kerosene Rocket Fuel.
July 18, 1929 – Darst Creek Oilfield discovered in West Texas
With initial production of 1,000 barrels of oil a day, the Texas Company No. 1 Dallas Wilson well revealed a new West Texas oilfield at Darst Creek in Guadalupe County, about five miles from the southwestern edge of the Luling oilfield. The field would be developed by Humble Oil and Refining (later Exxon), Gulf Production Company, Magnolia Petroleum (later Mobil), as well as the Texas Company (later Texaco).
The Petroleum Museum of Midland, Texas, in 2019 erected a circa 1930 derrick used in the Darst Creek oilfield. Photo courtesy the Petroleum Museum.
By December 1931, the Darst Creek field produced more than 19.7 million barrels of oil from an average depth of 2,650 feet, according to a Humble Oil geologist, who noted that of the 291 wells drilled, just 19 were dry holes. The West Texas field also was among the first to operate under proration.
“To avoid the risks of unregulated production with a resulting loss of reservoir pressure, water encroachment and cheap crude prices, the operators agreed to voluntary proration in the field,” noted a Petroleum Museum newsletter, adding that “voluntary proration proved to be difficult to maintain.”
July 19, 1915 – Petroleum powers Washers and Mowers
Howard Snyder applied to patent his internal combustion-powered washing machine, assigning the rights to the Maytag Company. His washer for “the ordinary farmer” who lacked access to electricity used a one-cylinder, two-cycle engine that could operate using gasoline, kerosene, or alcohol.
Advertisements featured two popular consumer products powered by air-cooled internal combustion engines.
Four years later, Edwin George of Detroit removed the engine from his wife’s Maytag washing machine and added it to a reel-type lawnmower. His invention launched the Moto-Mower Company, which sold America’s first commercially successful gasoline-powered lawn mower.
July 19, 1957 – Oilfield discovered in Alaska Territory
Although some oil production had occurred earlier in the territory, Alaska’s first commercial oilfield was discovered by Richfield Oil Company, which completed its Swanson River Unit No. 1 in Cook Inlet Basin. The well yielded 900 barrels of oil per day from a depth of 11,215 feet.
Even the Anchorage Daily Times could not predict oil production would account for more than 90 percent of Alaska’s revenue.
Alaska’s first governor, William Egan, proclaimed the oilfield discovery provided “the economic justification for statehood for Alaska” in 1959. Richfield leased more than 71,000 acres of the Kenai National Moose Range, now part of the 1.92 million-acre Kenai National Wildlife Refuge.
By June 1962, about 50 wells were producing more than 20,000 barrels of oil a day. Richfield Oil Company merged with Atlantic Refining Company in 1966, becoming Atlantic Richfield (ARCO), which with Exxon discovered the giant Prudhoe Bay field in 1968.
Learn about the 49th state in First Alaska Oil Wells.
July 20, 1920 – Discovery Well of the Permian Basin
The Permian Basin made headlines in 1920 when a wildcat well erupted oil from a depth of 2,750 feet on land owned by Texas Pacific Land Trust agent William H. Abrams, who just weeks earlier had discovered the West Columbia oilfield in Brazoria County south of Houston.
The latest W.H. Abrams No. 1 well — “shot” with nitroglycerin by the Texas Company (later Texaco) — proved to be part of the Permian Basin, encompassing 75,000 square miles in West Texas and southeastern New Mexico.
The Permian Basin would become the leading source of U.S. oil. Image courtesy Rigzone.
According to a Mitchell County historical marker, “land that sold for 10 cents an acre in 1840 and $5 an acre in 1888 now brought $96,000 an acre for mineral rights, irrespective of surface values…the flow of oil money led to better schools, roads and general social conditions.”
A 1923 Permian Basin well near Big Lake brought yet another Texas drilling boom — and helped establish the University of Texas (see Santa Rita taps Permian Basin).
July 20, 2006 – Hughes Glomar Explorer recognized as Engineering Landmark
Former top-secret CIA ship Hughes Glomar Explorer, which became a pioneering petroleum industry drillship, was designated a mechanical engineering landmark during a Houston awards ceremony that included members of the original engineering team and the ship’s crew.
The American Society of Mechanical Engineers (ASME) in 2006 proclaimed Hughes Glomar Explorer, “a technologically remarkable ship.” Illustration courtesy ASME.
The American Society of Mechanical Engineers (ASME) designated the vessel, a technologically remarkable ship and historic mechanical engineering landmark. Built in 1972 as a clandestine Soviet submarine recovery project, the vessel’s design was “decades ahead of its time for working at extreme depths.” Modified and relaunched in 1998, Glomar Explorer became the pioneer of all modern drillships.
Learn more in Secret History of Drill Ship Glomar Explorer.
July 21, 1935 – “Diamond Glenn” McCarthy strikes Oil
Glenn H. McCarthy struck oil 50 miles east of Houston in 1935, extending the already prolific Anahuac field. The well was the first of many for the Texas independent producer who would discover 11 Texas oilfields by 1945.
McCarthy became known as another “King of the Wildcatters” and “Diamond Glenn” by 1950, when his estimated worth reached $200 million ($2 billion today).
Glenn McCarthy appeared on TIME magazine in 1950.
In addition to his McCarthy Oil and Gas Company, McCarthy eventually owned a gas company, a chemical company, a radio station, 14 newspapers, a magazine, two banks, and the Shell Building in Houston. In the late 1940s, he invested $21 million to build the 18-story, 1,100-room Shamrock Hotel — and reportedly spent $1 million on its St. Patrick’s Day 1949 opening gala, which newspapers dubbed, “Houston’s biggest party.”
Learn more in “Diamond Glenn” McCarthy.
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Recommended Reading: Stages to Saturn: A Technological History of the Apollo/Saturn Launch Vehicles
(2003); Wildcatters: Texas Independent Oilmen
(1984); From the Rio Grande to the Arctic: The Story of the Richfield Oil Corporation
(1972); Kenai Peninsula Borough, Alaska
(2012); Texon: Legacy of an Oil Town, Images of America
(2011); Oil in West Texas and New Mexico
(1982); The Big Rich: The Rise and Fall of the Greatest Texas Oil Fortunes
(2009). Your Amazon purchase benefits the American Oil & Gas Historical Society. As an Amazon Associate, AOGHS earns a commission from qualifying purchases.
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The American Oil & Gas Historical Society (AOGHS) preserves U.S. petroleum history. Please become an AOGHS annual supporter and help maintain this energy education website and expand historical research. For more information, contact bawells@aoghs.org. © 2024 Bruce A. Wells. All rights reserved.
