April 10, 1866 – Densmore Brothers patent Railroad Oil Tank Car – 

James and Amos Densmore of Meadville, Pennsylvania, received a patent for their “Improved Car for Transporting Petroleum,” developed a year earlier in the northwestern Pennsylvania oil regions. Their patent illustrated a simple but sturdy design for securing two re-enforced containers on a typical railroad car.

Patent drawing of Densmore Oil Tank Car that briefly revolutionized transportation of oil.

The Densmore oil tank car briefly revolutionized the bulk transportation of oil to market. Hundreds of the twin tank railroad cars were in use by 1866.

Although the Densmore cars were an improvement, they would be replaced by the more practical single, horizontal tank. After leaving the business, Amos Densmore in 1875 invented a new way for arranging “type writing machines” so commonly used letters would no longer collide — the “Q-W-E-R-T-Y” keyboard. James Densmore’s continued success in oilfields helped finance the start of the Densmore Typewriter Company.

Learn more in Densmore Brothers invent First Oil Tank Car.

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April 11, 1957 – Oklahoma Independent William Skelly dies

William Grove Skelly (1878 -1957) died in Tulsa after a long career as an independent producer that he began as a 15-year-old tool dresser in early Pennsylvania oilfields. Prior to World War I, he found success in the El Dorado field outside Wichita, Kansas. Skelly incorporated Skelly Oil Company in Tulsa in 1919. Four years later, he established the International Petroleum Exposition while serving as president of the Tulsa Chamber of Commerce. Skelly also helped establish the first FM radio station in Oklahoma, KWGS, in 1947.

April 13, 1974 – Depth Record set in Oklahoma Anadarko Basin

After drilling for 504 days and costing about $7 million, the Bertha Rogers No. 1 well reached a total depth of 31,441 feet (5.95 miles) before being stopped by liquid sulfur. Drilled in the heart of Oklahoma’s Anadarko Basin, it was the deepest well in the world for more than a decade.

Robert Hefner III’s GHK Company and partner Lone Star Producing Company believed natural gas reserves resided deep in the basin, which extends across West-Central Oklahoma and the Texas Panhandle. Their first attempt began in 1967 and took two years to reach what at the time was a record depth of 24,473 feet.

A 1974 souvenir plaque of the Bertha Rogers No. 1 World's Deepest Well.

A 1974 souvenir plaque of the Bertha Rogers No. 1 well, which reached almost six miles deep in Oklahoma’s Anadarko Basin.

The high-tech well found plenty of natural gas, according to historian Robert Dorman, but because of federal price controls at the time, “the sale of the gas could not cover the high cost of drilling so deeply – $6.5 million, as opposed to a few hundred thousand dollars for a conventional well.”

Drilling had begun in November 1972 and averaged about 60 feet per day. By April 1974, bottom-hole pressure reached almost 25,000 pounds per square inch with a temperature of 475 degrees. It took eight hours for cuttings to reach the surface. The well’s 1.5 million pounds of casing was the heaviest ever handled by any drilling rig.

Learn more in Anadarko Basin in Depth.

April 14, 1865 – Dramatic Oil Company’s failed Oilman turns Assassin

After failing to make his fortune in Pennsylvania oilfields, John Wilkes Booth assassinated President Abraham Lincoln in Washington, D.C. Just one year earlier Booth had left his acting career to drill an oil well in booming Venango County.

In January 1864, Booth visited Franklin, Pennsylvania, where he leased 3.5 acres on a farm, about one mile south of the village of Franklin and on the east side of the Allegheny River. With several partners, including his friends from the stage, Booth formed the Dramatic Oil Company and raised money to drill a well.

John Wilkes Booth oil well map near Titusville, PA, and portrait.

John Wilkes Booth made his first trip to the oil boom town of Franklin, Pennsylvania, in January 1864. He purchased a 3.5-acre lease on the Fuller farm. Circa 1865 photo of Booth by Alexander Gardner courtesy Library of Congress.

Although the Dramatic Oil Company’s well found oil and began producing about 25 barrels a day, Booth and his partners wanted more and tried “shooting” the well to increase production. When the well was ruined, the failed oilman left the Pennsylvania oil region for good in July 1864.

Learn more in Dramatic Oil Company.

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April 15, 1857 – First Natural Gas Company incorporated

Two years before the first U.S. oil well was completed in Pennsylvania, the Fredonia Gas Light and Water Works Company incorporated in New York. A Fredonia gunsmith and machinist, William A. Hart, had successfully drilled a natural gas well on his third attempt, according to Lois Barris in her “Fredonia Gaslight and Waterworks Company.”

“He left a broken drill in one shallow hole and abandoned a second site at a depth of forty feet because of the small volume of gas found,” she noted. Hart drilled and completed the well about 70 feet beneath, “a bubbling gas spring in the bed of a creek.” After constructing a basic gasometer, he “proceeded to pipe and market the first natural gas sold in this country.”

Fredonia Gas Light and Water Works Company built America’s first natural gas system as other communities developed pipeline networks for gas made from coal. The first U.S. manufactured gas street lamps appeared in Baltimore in 1817 (see Illuminating Gaslight).

 April 15, 1897 – Beginning of Oklahoma Oil Industry

A large crowd gathered at the Nellie Johnstone No. 1 well near Bartlesville, in the Indian Territory that would become Oklahoma a decade later. George Keeler’s stepdaughter dropped a “go devil” that set off a downhole canister of nitroglycerin. The resulting oil gusher heralded the start of Oklahoma’s petroleum industry.

Although historians have recorded earlier marginal producers, including an 1888 oil well, the Johnstone No. 1 discovery revealed the Bartlesville-Dewey Field, ushering in the commercial petroleum era for Oklahoma Territory. By the time of statehood, Oklahoma would lead the entire world in oil production.

A 2017 water gusher demo at Nellie Johnstone No. 1 replica in Discovery One Park, Bartlesville, Oklahoma.

A 2017 water gusher demonstration of the Nellie Johnstone No. 1 replica in Discovery One Park, Bartlesville, Oklahoma.

Drilling had begun in January 1897, the same month that Bartlesville incorporated with a population of about 200 people. Four months later, at 1,320 feet, the Nellie Johnstone No.1 well (named for partner William Johnstone’s six-year-old daughter), showed the first signs of oil. Bartlesville’s population grew to 4,000 over the next 10 years as Oklahoma’s production exceeded 43 million barrels of oil per year.

A replica 84-foot wooden derrick and nearby education center now tell the story of the historic well in Discovery One Park. The park’s land was donated by Nellie Johnstone Cannon, descendant of a Delaware chief.

Learn more in First Oklahoma Oil Well.

April 16, 1855 – Yale Scientist sees Value in Rock Oil

Yale chemist Benjamin Silliman Jr. reported Pennsylvania “rock oil” could be distilled into a high-quality illuminating oil. The professor’s “Report on Rock Oil or Petroleum” convinced a businessman George Bissell and a group of New Haven, Connecticut, investors to finance Edwin Drake to drill where Bissell had found oil seeps in northwestern Pennsylvania.

petroleum history april 11

A report about oil’s potential as an illuminant will lead to the Pennsylvania Rock Oil Company discovering America’s first commercial well.

“Gentlemen,” Silliman wrote, “it appears to me that there is much ground for encouragement in the belief that your company have in their possession a raw material from which, by simple and not expensive processes, they may manufacture very valuable products.”

Silliman’s conclusion that the popular lamp fuel kerosene could be distilled from oil as readily as coal led to the first U.S. commercial oil well four years later.

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April 16, 1920 – First Arkansas Oil Well

Col. Samuel S. Hunter of the Hunter Oil Company of Shreveport, Louisiana, completed the first oil well in Arkansas. His Hunter No. 1 well had been drilled to 2,100 feet. Natural gas was discovered a few days later by Constantine Oil and Refining Company north of what would become the El Dorado field in Union County.

April petroleum history

The Arkansas Museum of Natural Resources is just north of El Dorado.

Although Col. Hunter’s oil well yielded only small quantities, his discovery was followed by a January 1921 gusher — the S.T. Busey well — in the same field. These wells, which made headlines, launched the state’s petroleum industry, according to the Arkansas Museum of Natural Resources.

Hunter would sell his original lease of 20,000 acres to Standard Oil Company of Louisiana for more than $2.2 million.

Learn more in First Arkansas Oil Wells.


Recommended Reading: The American Railroad Freight Car (1995); Story of the Typewriter, 1873-1923 (2019); Oil in Oklahoma (1976); Myth, Legend, Reality: Edwin Laurentine Drake and the Early Oil Industry (2009); Early Louisiana and Arkansas Oil: A Photographic History, 1901-1946 (1982); . 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. Become an AOGHS annual supporting member and help maintain this energy education website and expand historical research. For more information, contact bawells@aoghs.org. Copyright © 2023 Bruce A. Wells. All rights reserved. 

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