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 | Jan 11, 2025 | Petroleum Technology
Oilfield production technologies began in Pennsylvania with an economical way to pump multiple wells.
In the earliest days of the petroleum industry, which began with an 1859 oil discovery in Pennsylvania, production technologies used steam power and a walking beam pump system that evolved into ways for economically producing oil from multiple wells.
Just as drilling technologies evolved from spring poles to steam-powered cable tools to modern rotary rigs, oilfield production also improved.
This image of a circa 1909 double eccentric power wheel manufactured by the Titusville (Pennsylvania) Iron Works is just one example of what can be discovered online at public domain resources. Photo courtesy Library of Congress Prints and Photographs Collections.
In the early days of the industry, oil production technology used steam power and a wooden walking beam. A steam engine at each well raised and lowered one end of the beam. An oil production technique perfected in Pennsylvania used central power for pumping low-production wells to economically recover oil.
Library of Congress Collection
A Library of Congress (LOC) photograph from 1909 shows a “double eccentric power wheel,” part of an innovative centralized power system. The oilfield technology from a South Penn Oil Company (the future Pennzoil) lease between the towns of Warren and Bradford, Pennsylvania.
The LOC photograph preserves the oilfield technology that used the two wheels’ elliptical rotation for simultaneously pumping multiple oil wells. The wheels’ elliptical rotation simultaneously pumped eleven remote wells. This central pump unit operated in the Morris Run oilfield, discovered in 1883. It was manufactured at the Titusville Iron Works.
Many oilfield history resources can be found in the Library of Congress Digital Collections and the related images of petroleum history photography. The development of centralized pumping systems — eccentric wheels and jerk lines — often are preserved in high-resolution files.
The Morris Run field produced oil from two shallow “pay sands,” both at depths of less than 1,400 feet. It was part of a series of other early important discoveries.
Late 18th-century Oil Well Supply Company illustration of pumping system using rods, cables, and an eccentric wheel.
In 1881, the Bradford field alone accounted for 83 percent of all the oil produced in the United States (see Mrs. Alford’s Nitro Factory). Today, new technologies are producing natural gas from a deeper formation, the Marcellus Shale.
Although production from some early shallow Pennsylvania wells declined to only about half a barrel of oil a day, some continued pumping into 1960.
Central Power Units
As the number of oil wells grew in the early days of America’s petroleum industry, simple water-well pumping technologies began to be replaced with advanced, steam-driven walking beam pump systems.
At first, each well had an engine house where a steam engine raised and lowered one end of a sturdy wooden beam, which pivoted on the cable-tool well’s “Samson Post.” The walking beam’s other end cranked a long string of sucker rods up and down to pump oil to the surface.
America’s oilfield technologies advanced in 1875 with this “Improvement In Means For Pumping Wells” invented in Pennsylvania.
Recognizing that pumping multiple wells with a single steam engine would boost efficiency, on April 20, 1875, Albert Nickerson and Levi Streeter of Venango County, Pennsylvania, patented their “Improvement in Means for Pumping Wells.”
Their system was the forerunner of wooden or iron rod jerk line systems for centrally powered oil production. This technology, eventually replaced by counter-balanced pumping units, will operate well into the 20th century – and remain an icon of early oilfield production.
“By an examination of the drawing it will be seen that the walking beam to well No. 1 is lifting or raising fluid from the well. Well No. 3 is also lifting, while at the same time wells 2 and 4 are moving in an opposite direction, or plunging, and vice versa,” the inventors explained in their patent application (No. 162,406).
“Heretofore it has been necessary to have a separate engine for each well, although often several such engines are supplied with steam from the same boiler,” they noted. “The object of our invention is to enable the pumping of two or more wells with one engine.”
By it the walking beams of the different wells are made to move in different directions at the same time, thereby counterbalancing each other, and equalizing the strain upon the engine.
An Allegheny National Forest Oil Heritage Series illustration of an oilfield “jack plant” in McKean County, Pennsylvania.
Steam initially drove many of these central power units, but others were converted to burn natural gas or casing-head gas at the wellhead – often using single-cylinder horizontal engines. Examples of the engines, popularly called “one lungers” by oilfield workers, have been collected and restored (see Coolspring Power Museum).
Many widely used techniques of drilling and pumping oil were developed in an effort to recover the high-quality “Pennsylvania Grade” oil. Image courtesy Library of Congress.
The heavy and powerful engine — started by kicking down on one of the iron spokes — transferred power to rotate an “eccentric wheel,” which alternately pushed and pulled on a system of rods linked to pump jacks at distant oil wells.
“Transmitting power hundreds of yards, over and around obstacles, etc., to numerous pump jacks required an ingenious system of reciprocating rods or cables called Central Power and jerker lines,” explains documentation from an Allegheny National Forest Oil Heritage Series illustration of an oilfield “jack plant” in McKean County, Pennsylvania. The long rod lines were also called shackle lines or jack lines.
A single engine with eccentric wheel connecting rod lines could economically pump oil using Oil Well Supply Company’s “Simplex Pumping Jacks.”
Around 1913, with electricity not readily available, the Simplex Pumping Jack became a popular offering from Oil Well Supply Company of Oil City, Pennsylvania. The simple and effective technology could often be found at the very end of long jerk lines.
A central power unit could connect and run several of these dispersed Simplex pumps. Those equipped with a double eccentric wheel could power twice as many.
Roger Riddle, a local resident and field guide for the West Virginia Oil & Gas Museum in Parkersburg, was raised around central power units and recalls the rhythmic clanking of rod lines.
Riddle has guided visitors through dense nearby woods where remnants of the elaborate systems rust. The heavy equipment once “pumped with just these steel rods, just dangling through the woods,” he says. “You could hear them banging along – it was really something to see those work. The cost of pumping wells was pretty cheap.”
The heyday of central power units passed when electrification arrived, nonetheless, a few such systems remain in use today. Learn more about the evolution of petroleum production methods in All Pumped Up – Oilfield Technology.
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Recommended Reading: Drilling Technology in Nontechnical Language
(2012); Trek of the Oil Finders: A History of Exploration for Petroleum (1975). 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: “Eccentric Wheels and Jerk Lines.” Authors: B.A. Wells and K.L. Wells. Website Name: American Oil & Gas Historical Society. URL: https://aoghs.org/technology/jerk-lines-eccentric-wheels. Last Updated: January 10, 2025. Original Published Date: November 20, 2017.
by Bruce Wells | Jan 6, 2025 | Offshore History
As the turn of the century approached, oil producing Ohio wells drilled far out over a reservoir mark the beginning of America’s offshore petroleum industry, according to Mercer County historians.
America’s first offshore drilling once was generally acknowledged to be over Louisiana’s Caddo Lake in 1911 – until researchers in Mercer and Auglaize counties in Ohio said otherwise.
Oil patch sleuths pointed to Mercer County documents recording wells producing oil above the waters of Grand Lake St. Marys at least 20 years before drillers ventured over the waters of Caddo Lake above the giant Caddo-Pine Island field. (more…)
