All Pumped Up – Oil Field Technology
In a valley in northwestern Pennsylvania in 1859, Edwin Drake discovered America’s first significant quantities of oil. For his oil well pump, he borrowed a common water well hand pump to retrieve the new resource from 69.5 feet.
As the American petroleum industry was born, it wasn’t long before necessity and ingenuity combined to find something more efficient for producing oil from a well.
Industry pioneers realized that by improving oil well pump efficiency they could extend the economic life of far deeper wells by years. The new resource will be refined to meet the phenomenal worldwide demand for an inexpensive lamp fuel: kerosene.
The evolution of technology for pumping oil from the ground is reflected in thousands of small, marginally producing oil wells reaching deep into often stubborn reserves.
Although there are almost one-half million wells in the United States that produce less than 15 barrels of oil per day, their total production remains significant.
Oil wells will run dry, but advances in “artificial lift systems” technology can put off the inevitable. But even with today’s best technologies, more than half of the oil can remain trapped underground.
Low-volume marginal or “stripper” wells produce no more than 15 barrels a day. The average stripper well produces only about 2.2 barrels per day. These wells comprise 84 percent of U.S. oil wells and produce 18 percent of all domestic oil.
Marginal oil and natural gas wells number about 650,000 of the nation’s 876,000 wells. Once shutdown, they are lost forever. Keeping them in production has long been a challenge for a special breed of oilman, one who combines technical skills with hard work in the field.
“This is an occupation where most of your work is done in all types of weather while working alone, with few thanks, and possibly only a small herd of cattle as company,” notes the Oklahoma Commission on Marginally Producing Oil and Gas Wells.
It was the same in the industry’s earliest oil well pump days.
Eccentric Wheels and Jerk-Lines
Marginal quantities of oil always need help leaving the well. In the early days of the industry, oilmen adapted water-well technology to the problem and used steam-driven walking beam pump systems. At each well, a steam engine rhythmically raised and lowered one end of a sturdy wooden beam, which pivoted on a Samson post.
The walking beam’s other end cranked a long string of sucker rods up and down to pump oil to the surface. The beam walked and the oil surfaced, but a more efficient system was needed. One of the early oil pumping innovations came from an 1875 patent:
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.
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.
However, it was not long before a more compact and efficient mechanism replaced the multiple wooden Samson post and walking beam arrangement.
The 1913 Simplex Pumping Jack was a widely popular offering from Oil Well Supply Co. of Oil City, Pennsylvania. A central power source could connect and operate several of these dispersed Simplex units by way of steel rod lines (also called jerk-lines).
Roger Riddle, a local resident and field guide for the Oil & Gas Museum in Parkersburg, West Virginia, was raised around central power units and the rhythmic clanking of rod lines.
Today, Riddle guides visitors through the nearby woods where remnants of these elaborate oil well pump systems quietly rust.
“They pumped with just these steel rods, just dangling through the woods,” says Riddle. “You could hear them banging along – it was really something to see those work. The cost of pumping wells was pretty cheap.”
Steam power initially drove many of these eccentric power units, but some engines were converted to burn the natural gas or other inflammables often found with oil.
Single-cylinder steam engines converted to gasoline power were called “half-breeds” and remained beloved among collectors of oil field antiques.
The conversions usually replaced the steam cylinder with a jacketed cylinder and piston assembly, keeping the original frame and flywheel. The new engine was half steam and half internal combustion, hence the name.
Early internal combustion engines produced only a few horsepower and could not replace steam engines in most applications, but by 1890 they were powerful enough for most portable or remote operations.
Electrification arrived and the heyday of central power units passed, but not entirely.
Today, a few miles from Flat Rock, two of Illinois’ once abundant central power units still operate in Crawford County.
Ninety-five-year-old Herman Tohill still remembers when Ohio Oil Company installed the units and rod lines on his grandfather’s land. Two sturdy 35-horsepower Superior gasoline engines provide the power.
As efficient as central these power units were, time and technology changed the oil field again.
Walter Trout’s Revolutionary Prototype
A new icon of oil field success appeared and was soon known by many names: Donkey, Grasshopper, Horse-head, Thirsty Bird, and Pump Jack, among others.
As East Texas timber supplies dwindled and the sawmill business declined, the long-established Lufkin Foundry & Machine Company discovered new opportunities in the oil field. As more oil discoveries were made, the company – in Lufkin, Texas – not only survived, but prospered.
Walter Trout was working in Texas for Lufkin Foundry & Machine in 1925 when he sketched out his idea for the now familiar counterbalanced oil well pump jack. Before the end of the year, the prototype was installed and working near Hull, Texas, in a Humble Oil Company oilfield.
“The well was perfectly balanced, but even with this result, it was such a funny looking, odd thing that it was subject to ridicule and criticism, and it took a long time, nearly a year, before we could convince many the idea was a good one,” Trout explained.
Modern stripper wells still look much like Walter Trout’s original, but they enjoy the reliability and efficiency that 85 more years of evolving technology have produced.
Lufkin Industries produces a variety of oil well pump units designed to meet worldwide needs. More than 200,000 units have been sold.
Advancements in Efficiency
As with nearly every segment of the petroleum industry, artificial lift systems – including the venerable pump jack – are also benefiting from inclusion of “smart” technology, notes a representative from another leading oil field supply company.
“The computer-based technology is used to monitor and analyze pump systems in realtime from miles away, quickly and with minimal human interference,” says Paul Nelson of Weatherford International Ltd., Houston.
“On pump jacks that means constant monitoring of well production and the lift unit in order to optimize energy usage while maximizing the amount of oil recovered from reluctant zones,” Nelson adds.
Smart well technology is of particular importance to the United States, where a very large portion oil is produced from thousands of stripper wells producing less than 10 barrels a day, Nelson explains.
Many of these wells have reached such a depleted pressure state that once they are shut in they can never be economically restarted. The majority of them are being kept alive by oil well pump jacks.
“By improving pump efficiencies without adding significantly to operating costs, smart well technology stands to extend by years the economic life of many of these wells and, by extension, add millions of barrels of oil to U.S. reserves,” he concludes.
Edwin L. Drake (1819-1880) became the “father of the petroleum industry” when he drilled what most consider America’s first commercial oil well on August 27, 1859, near Titusville, Pennsylvania. He used a steam engine and cable-tool rig. Learn more by visiting the Drake Well Museum.
Drake overcame many financial and technical obstacles to make his historic discovery. He also pioneered new drilling technologies, including using iron casing to isolate his well bore from nearby Oil Creek.
Seeking oil for the Seneca Oil Company for refining into a new product (kerosene) Drake’s shallow well created today’s petroleum industry. See more in First American Oil Well.
Learn more about drilling technology – including how “fishtail” bits became obsolete in 1909 when Howard Hughes Sr. introduced the twin-cone roller bit: Making Hole — Drilling Technology.
Another innovative advance came in 1933 with the use of slant drilling to solve a major oil field crisis - see Technology and the “Conroe Crater.“
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