by Bruce Wells | Jun 11, 2026 | Petroleum Technology
Armais Arutunoff designed a downhole centrifugal pump and founded an oilfield service company.
The modern petroleum industry owes a lot to the son of an Armenian soap maker who invented an artificial lift system using an electric motor to drive a centrifugal pump at the well.
With the help of the Phillips Petroleum Company in the 1930s, Armais Sergeevich Arutunoff moved to Bartlesville, Oklahoma, and built the earliest practical downhole electric submersible pump. His invention would enhance oilfield production in wells worldwide.
Armais Arutunoff (1893-1978), inventor of the modern electric submersible pump.
A 1936 Tulsa World article described the Arutunoff electric submersible pump (ESP) as “an electric motor with the proportions of a slim fence post which stands on its head at the bottom of a well and kicks oil to the surface with its feet.”
By 1938, an estimated two percent of all oil produced in the United States with artificial lift used an Arutunoff pump (see All Pumped Up – Oilfield Technology).
Early Downhole Patents
The first U.S. patent for an oil-related electric pump arrived in the late 19th century during the growth of electrical power generation, according to a 2014 article in the Journal of Petroleum Technology (JPT).
In 1894, a design by Harry Pickett (patent no. 529,804) used a downhole rotary electric motor with “a Yankee screwdriver device to drive a plunger pump.” Expanding Picket’s concept, Robert Newcomb in 1918 received a patent for his “electro-magnetic engine” driving a reciprocating plunger.
“Heretofore, in very deep wells the rod that is connected to the piston, and generally known as the ‘sucker’ rod, very often breaks on account of its great length and strains imposed thereon in operating the piston,” noted Newcomb in his patent application.
Arutunoff obtained 90 patents, including one in 1934 for an improved well pump and electric cable. At right is a 1951 “submergible” Reda ad.
Although several patents followed those of Picket and Newcomb, the Journal reports, “It was not until 1926 that the first patent for a commercial, operatable ESP was issued — to ESP pioneer Armais Arutunoff. The cable used to supply power to the bottomhole unit was also invented by Arutunoff.”
Reda: Russian Electrical Dynamo of Arutunoff
Arutunoff built his first ESP in 1916 in Germany, according to the Oklahoma Historical Society. “Suspended by steel cables, it was dropped down the well casing into oil or water and turned on, creating a suction that would lift the liquid to the surface formation through pipes,” reported OHS historian Dianna Everett.
After immigrating to the United States in 1923, in California Arutunoff could not find financial support for manufacturing his pump design. He moved to Bartlesville, Oklahoma, in 1928 at the urging of a new friend, Frank Phillips, head of Phillips Petroleum Company.
“With Phillips’s backing, he refined his pump for use in oil wells and first successfully demonstrated it in a well in Kansas,” noted Everett. The small company that became Reda Pump manufactured the device.
The name Reda – Russian Electrical Dynamo of Arutunoff – derived from the cable address of the company that Arutunoff originally started in Germany. The inventor would move his family into a Bartlesville home just across the street from Frank Phillips’ mansion.
The Arutunoff family lived in this Bartlesville home across from Frank Phillips’s home, today a museum. Photo courtesy Kathryn Mann, Visit Bartlesville.
A holder of more than 90 patents in the United States, Arutunoff was elected to the Oklahoma Hall of Fame in 1974. “Try as I may, I cannot perform services of such value to repay this wonderful country for granting me sanctuary and the blessings of freedom and citizenship,” Arutunoff said at the time.
Artificial lift spins the impellers on the pump shaft, putting pressure on the surrounding fluids and forcing them to the surface. Image courtesy Schlumberger.
Arutunoff died in February 1978 in Bartlesville. At the end of the 20th century, Reda ranked as the world’s largest manufacturer of ESP systems. It is now part of Schlumberger.
Armais Sergeevich Arutunoff was born to Armenian parents in Tiflis, part of the Russian Empire, on June 21, 1893. His hometown in the Caucasus Mountains dates back to the 5th Century. His father manufactured soap; his grandfather earned a living as a fur trader.
Centrifugal Pumps
As a young scientist, Arutunoff’s research convinced him that electrical transmission of power could be efficiently applied to oil drilling and improve the production methods he saw in use in the early 1900s in Russia.
Downhole production would require a powerful electric motor, but limitations imposed by the available casing sizes required a new kind of motor.
A small-diameter motor had too little horsepower for the job, Arutunoff discovered. He studied the fundamental laws of electricity seeking answers to how to build a higher horsepower motor exceedingly small in diameter.
By 1916, Arutunoff designed a centrifugal pump to be coupled to the motor for de-watering mines and ships. To develop enough power, the motor needed to run at very high speeds. He successfully designed a centrifugal pump, small in diameter and with stages to achieve high discharge pressure.
Arutunoff designed a motor ingeniously installed below the pump to cool the motor with flow moving up the oil well casing. The entire unit could be suspended in the well on the discharge pipe. The motor, sealed from the well fluid, operated at high speed in the oil.
Although Arutunoff built the first centrifugal pump while living in Germany, he built the first submersible pump and motor in the United States while living in southern California.
Friend of Frank
Arutunoff already had formed Reda to manufacture his idea for electric submersible motors, and after living in Germany, Arutunoff came to the United States with his wife and one-year-old daughter to settle in Michigan, and then Los Angeles.
However, after emigrating to America in 1923, Arutunoff could not find financial support for his downhole production technology. Everyone he approached turned him down, believing his downhole concept impossible under the “laws of electronics.”
No one would consider his inventions until a friend at Phillips Petroleum Company — Frank Phillips — encouraged him to form his own company in Bartlesville. The Arutunoff family moved into a house on the same street as the Phillips home.
Arutunoff’s manufacturing plant in Bartlesville spread over nine acres, employing hundreds during the Great Depression.
In 1928 Arutunoff moved to Bartlesville, where he formed Bart Manufacturing Company, which changed its name to Reda Pump Company in 1930. He soon demonstrated a working model of an oilfield electric submersible pump.
Upside down Motors
One of his pump-and-motor devices produced oil at well in the El Dorado field near Burns, Kansas — the first equipment of its kind to be used downhole. One reporter telegraphed his editor, “Please rush good pictures showing oil well motors that are upside down.”
By the end of the 1930s, Arutunoff’s company held dozens of patents for industrial equipment, leading to decades of success — and still more patents. His “Electrodrill” aided scientists in penetrating the Antarctic ice cap for the first time in 1967.
Arutunoff oilfield technologies had a significant impact on the petroleum industry — quickly proving crucial to successful production for hundreds of thousands of U.S. oil wells.
Also see Conoco & Phillips Petroleum Museums.
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Recommended Reading: Artificial Lift-down Hole Pumping Systems
(1984); Oil Man: The Story of Frank Phillips and the Birth of Phillips Petroleum
(2016). Your Amazon purchase benefits the American Oil & Gas Historical Society. As an Amazon Associate, AOGHS earns a commission from qualifying purchases.
_______________________
The American Oil & Gas Historical Society (AOGHS) preserves U.S. petroleum history. Support this energy education website, subscribe to our monthly email newsletter, and help expand historical research. Contact bawells@aoghs.org. Copyright © 2026 Bruce A. Wells.
Citation Information – Article Title: “Inventing the Electric Submersible Pump.” Author: Aoghs.org Editors. Website Name: American Oil & Gas Historical Society. URL: https://aoghs.org/technology/electric-submersible-pump-inventor. Last Updated: June 11, 2026. Original Published Date: April 29, 2014.
by Bruce Wells | Jun 7, 2026 | 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.
Inside an oilfield central power house with a circa 1909 double-eccentric wheel manufactured by the Titusville Iron Works, Pennsylvania, used to pump multiple oil wells. Photo courtesy Library of Congress.
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.
Eccentric Wheels
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 in Pennsylvania 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.
Oil Well Supply Company illustration of its pumping system for using rods, cables, and a geared, eccentric wheel with elliptical rotation simultaneously pumping remote wells.
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). By the early 2000s, new technologies began producing large amounts of natural gas from a far deeper formation, the Marcellus Shale.
Oil production from some of the earliest shallow Pennsylvania wells declined to only about half a barrel of oil a day, but some continued pumping into 1960. On the West Coast, a 1913 central pumping unit produced from California’s largest oilfield three decades longer.
Midway-Sunset Jack Plant
On June 9, 2023, the National Park Service added the Midway-Sunset Jack Plant to the National Register of Historic Places — thanks to Mark Smith, who submitted the application to preserve the facility. Installed by the Engineers Oil Company in 1913, the Kern County jack plant pumped oil until 1990.
In operation until 1990, California’s Midway-Sunset Jack Plant used eccentric-wheel technologies from the late 19th century. The Kern County plant pumped more than 1.5 million barrels of oil. Photos courtesy John Harte. Illustration courtesy San Joaquin Geological Society.
“The Midway-Sunset Jack Plant is an extremely rare example of central power and ‘jack-line’ oil pumping technology on its original site and housed in its original building,” Smith noted in his 45-page draft application to the State Historical Resources Commission. “Its design and operational history reflect significant advancements in oil extraction technology.”
According to company records, the jack plant’s slowly rotating eccentric wheels produced 1.5 million barrels of oil during its lifetime. The end came when the bearing of the vertical shaft became worn, causing the shaft to wobble. The wobble of the eccentric gears made the pumping of the wells out of balance.
Pumping Multiple Wells
As the number of oil wells grew in the early days of America’s petroleum industry in Pennsylvania, simple water-well pumping technologies began to be replaced with steam-driven walking-beam pumping 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.
Oilfield technologies evolved 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).
Central Power Units
“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,” noted Nickerson and Streeter.
“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.”
Allegheny National Forest Oil Heritage Series illustration of a 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 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.
Pump Jacks
“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.
The series documentation includes an early 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 retired field guide for the West Virginia Oil & Gas Museum in Parkersburg, grew up around central power units and recalls the rhythmic clanking of rod lines.
Riddle 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 said. “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, the first counter-balanced “Nodding Donkeys” 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.
_______________________
The American Oil & Gas Historical Society (AOGHS) preserves U.S. petroleum history. Support this energy education website, subscribe to our monthly email newsletter, and help expand historical research. Contact bawells@aoghs.org. Copyright © 2026 Bruce A. Wells.
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: June 8, 2026. Original Published Date: November 20, 2017.
by Bruce Wells | May 15, 2026 | Petroleum Technology
Texas well disaster of 1933 helped bring advancements in directional drilling.
A Depression-era disaster in a giant oilfield near Conroe, Texas, brought together the inventor of portable drilling rigs and the father of directional drilling. George E. Failing and H. John Eastman employed new technologies that allowed “the bit burrowing into the ground at strange angles.”
Early Conroe oil wells revealed shallow but “gas charged” oil-producing sands in what would prove to be the third-largest oilfield in the United States at the time. By the end of 1932, more than 65,000 barrels of oil flowed daily from 60 wells in the region north of Houston. (more…)
by Bruce Wells | Apr 22, 2026 | Petroleum Technology
The two-wicked safety lamp designed for preventing “destructive conflagrations” on oil derricks.
Oil patch lore says “Yellow Dog” lanterns got their name because of two burning wicks that resembled a dog’s glowing eyes at night. Others say the lamps cast an eerie dog’s head shadow on the derrick floor.
Rare is the community oil museum that doesn’t have a Yellow Dog in its collection. Officially patented a decade after the Civil War, the two-wicked “Derrick Safety Lamp” would become an oilfield icon. But long before Yellow Dogs found their way to the oil patch, a similar design burned animal fat atop America’s lighthouses.
First patented in 1870, Jonathan Dillen’s lantern was “adapted for use in the oil regions…where the explosion of a lamp is attended with great danger by causing destructive conflagration and consequent loss of life and property.”
By the late 1700s, the cylindrical “Bucket Lamp” included two or four spouts protruding from its sides, according to Thomas Tag in Lighthouse Lamps Through Time. “Each spout carried a large diameter rope wick that extended down inside the body of the lamp into the oil.”
As late as 1874, four years after the Yellow Dog lamp’s patent, the U.S. Lighthouse Board of the Department of Treasury continued to mandate the use of lard for fueling the beacons, later rejecting electricity and natural gas because of “the complexity and cost of the apparatus.”
By 1877, the Lighthouse Board changed its illumination mandate to kerosene, which would be supplanted by electric arc lamps and followed by incandescent bulbs.
Inventing the Yellow Dog
Despite its many oilfield service manufacturers, the Yellow Dog’s origins remain in the dark. Some historical sources claim the derrick lamp’s design originated with the whaling industry, but neither the Nantucket nor New Bedford whaling museums have found any such evidence.
Railroad museums often include collections of cast iron smudge pots, but nothing approaching the heavy, crude-oil-burning lanterns once prevalent in oilfields from Pennsylvania to California.
An 1898 illustration of a cable-tool driller at work in the light of a nearby Yellow Dog lantern from Sketches in Crude Oil.
Inventor Jonathan Dillen of Petroleum Centre, Pennsylvania, was first to patent what became the iconic lantern of the early years of the petroleum industry. His U.S. patent was awarded on May 3, 1870. The two-wicked lamp joined other safety innovations as drilling technologies evolved.
The lamp was designed “for illuminating places out of doors, especially in and about derricks, and machinery in the oil regions, whereby explosions are more dangerous and destructive to life and property than in most other places.”
“My improved lamp is intended to burn crude petroleum as it comes from the wells fresh and gassy,” Dillen proclaimed. “It is to be used, mainly, around oil wells, and its construction is such as to make it very strong, so that it cannot be easily broken or exploded.”
Dillen’s Yellow Dog patent was improved upon and reissued in 1872 and again in 1877 when it was assigned to a growing oilfield equipment supplier.
Oil Well Supply Company
In 1861, John Eaton made a business trip to the booming oil region of western Pennsylvania. Within a few years, he had set up his own business with Edward Cole. With the addition of Edward Burnham, the company grew to become a preeminent supplier of oilfield equipment.
A John Eaton biography by his great-grandson notes Eaton was considered “the father of the well supply trade” of early Pennsylvania oilfields.
By 1877, Eaton, Cole & Burnham oilfield supply had outlets in the Pennsylvania oil regions, including Pittsburgh and Bradford. The company changed its name Oil Well Supply Company the next year, according to a biography by his great-grandson, Louis B. Fleming.
“The first goods manufactured by the Oil Well Supply Company were made on a foot lathe,” John Eaton would recall. The oilfield equipment supply company was operating 75 manufacturing plants by the turn of the 20th century.
The biography, John Eaton, by journalist Fleming, cited the classic 1898 book Sketches in Crude Oil, which noted that Oil Well Supply company’s founder and president “may fairly claim to be the father of the well supply trade.”
A Pennsylvania Historical and Museum Commission roadside marker erected in Oil City in 1992 notes: “Oil Well Supply Company — Founded nearby in 1878, it was a leading manufacturer of oil well machinery and supplies, serving the oil industry across the globe. By the early 1900s, employment peaked at 2,000. In 1930 it became a subsidiary of United States Steel.”
Incorporated in Pennsylvania as an oilfield service company, Forest Oil’s logo has always featured the iconic two-wicked lamp invented in 1870. Today Forest Oil is a Denver-based exploration company.
In Oil City at its 45-acre Imperial Works on the Allegheny River, Oil Well Supply manufactured oilfield engines and “cast and malleable iron goods” that included the two-wicked derrick safety lamp. The 1884 Oil Well Supply catalog listed Yellow Dog lamps at $1.50 each.
Today, along with their shadowy origins, the Yellow Dog lanterns are relegated to museums, antique shops and collectors. They sometimes can be found on display next to another unusual two-wicked lamp (see Camphene to Kerosene Lamps).
Oil Company Logo
After experimenting with injecting water into some wells to increase production from others, Forest Dorn partnered with his father Clayton in 1916 to establish Forest Oil, an oilfield service company in Pennsylvania’s giant Bradford oilfield.
The company in February 1824 adopted the two-wicked oilfield derrick lamp as part of its logo, which included a keystone shape inside the lantern to symbolize the state of Pennsylvania — where the first commercial U.S. oil well was drilled in Titusville in 1859.
Forest Oil Company developed an extremely efficient technique for “secondary recovery” of trapped petroleum reservoirs. The waterflooding proved revolutionary for improving oilfield production nationwide. The technological leap began at America’s first giant oilfield, discovered in 1871 in Bradford, about 70 miles east of Titusville.
An oil museum near Bradford, Pennsylvania, educates visitors using a replica of an 1880s standard cable-tool derrick. Photo by Bruce Wells.
By 1916, oil production in the Bradford field had declined to just under 40 barrels a day. The reserve was considered by many to be dry — until Forest Dorn had applied his water-flooding technique to initiate secondary recovery of oil. Forest Oil became widely recognized as a leader in secondary oil recovery systems.
Water-flooding boosted oilfield production and arrived as demand for gasoline was growing (see Cantankerous Combustion – First U.S. Auto Show). The rapidly growing science of petroleum geology also led to more “secondary recovery” technologies.
Enhanced recovery would be applied throughout the petroleum industry, extending individual well production by 10 years — especially benefitting the already considerable production from the largest oilfield in the lower 48 states, the East Texas oilfield, discovered in 1930.
Petroleum Museums
The history of America’s “first billion-dollar oilfield” is on exhibit at the Penn-Brad Historical Oil Park and Museum near Bradford, Pennsylvania — where a modern natural gas shale boom has renewed the historic oil patch economy.
Located in Custer City, three miles south of Bradford (home of Zippo lighters), the museum (maintained by many dedicated volunteers) “preserves the philosophy, the spirit, and the accomplishments of an oil country community.”
One attraction of the Penn-Brad museum is its 72-foot standard cable-tool derrick and engine house, replicas of 1880s technology that helped Bradford once produce 74 percent of all U.S. oil. It’s another noteworthy stop among other excellent Pennsylvania oil museums a few hours west of Bradford at the Drake Well Museum in Titusville.
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Recommended Reading: Early Days of Oil: A Pictorial History of the Beginnings of the Industry in Pennsylvania
(2000); Images of America: Around Bradford
(1997); The Prize: The Epic Quest for Oil, Money & Power (1991). Your Amazon purchase benefits the American Oil & Gas Historical Society. As an Amazon Associate, AOGHS earns a commission from qualifying purchases.
_______________________
The American Oil & Gas Historical Society (AOGHS) preserves U.S. petroleum history. Please support this energy education website, subscribe to our monthly email newsletter, and help expand historical research. Contact bawells@aoghs.org. Copyright © 2026 Bruce A. Wells.
Citation Information – Article Title: “Yellow Dog – Oilfield Lantern.” Authors: B.A. Wells and K.L. Wells. Website Name: American Oil & Gas Historical Society. URL: https://aoghs.org/technology/yellow-dog-oil-field-lantern. Last Updated: April 21, 2026. Original Published Date: September 1, 2008.
by Bruce Wells | Apr 10, 2026 | Petroleum Technology
The science behind petroleum exploration and production — and finding oil and natural gas at greater depths.
“A good cable-tool man is just about the most highly skilled worker you’ll find,” one veteran of the oil patch noted. “Besides having a feel for the job, knowing what’s going on thousands of feet under the ground just from the movement of the cable, he’s got to be something of a carpenter, a steam-fitter, an electrician, and a damned good mechanic.” – A 1939 interview in Voices from the Oil Fields by Paul Lambert and Kenny Franks.
Petroleum exploration technologies have evolved from ancient “spring poles” to steam-powered percussion cable-tools, to modern rotary rigs with steerable, diamond bits that can drill miles deep. (more…)
by Bruce Wells | Apr 8, 2026 | Petroleum Technology
Giant Oklahoma rigs drilled to record depths in the 1970s.
The Anadarko Basin, extending more than 50,000 square miles across west-central Oklahoma and the Texas Panhandle, includes some of the most prolific U.S. natural gas reserves — and a 1974 drilling record.
Beginning in the late 1950s, when technological advances allowed it, Anadarko Basin wells in Oklahoma began to be drilled more than two miles deep in search of natural gas. Dangerous, highly pressurized formations required state-of-the-art blowout preventers (see Ending Oil Gushers — BOP). (more…)
