Standard Oil Company of New Jersey incorporated a new subsidiary, Standard Oil Company of Indiana, and began processing oil at a new refinery in Whiting, Indiana, southeast of Chicago. The refinery, which became the largest in the United States by the mid-1890s, in 1910 added pipelines connecting it to Kansas and Oklahoma oilfields. (more…)
The modern petroleum industry owes a lot to the son of an Armenian soap maker.
With the help of a prominent Oklahoma oil company president in the 1930s, Armais Sergeevich Arutunoff designed 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 was lifted by an Arutunoff pump (see All Pumped Up – Oilfield Technology).
The first patent for an oil-related electric pump was issued in the late 19th century during the growth of electrical power generation, according to a September 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.
Armais Arutunoff obtained 90 patents, including one in 1934 for an improved well pump and electric cable. At right is a 1951 “submergible” Reda advertisement.
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.”
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 device was manufactured by a small company that soon became Reda Pump.
The name Reda – Russian Electrical Dynamo of Arutunoff – was 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 founder of Reda Pump once lived in this Bartlesville, Oklahoma, home across from Frank Phillips, whose home today is a museum. Photo courtesy Kathryn Mann, Only in Bartlesville.
A holder of more than 90 patents in the United States, Arutunoff was inducted into 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.
A modern ESP applies artificial lift by spinning the impellers on the pump shaft, putting pressure on the surrounding fluids and forcing them to the surface. It can lift more than 25,000 barrels of fluids per day. Courtesy Schlumberger.
Arutunoff died in February 1978 in Bartlesville. At the end of the twentieth century, Reda was 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 dated back to the 5th Century. His father was a soap manufacturer and his grandfather a fur trader.
As a young scientist, Arutunoff’s research convinced him that electrical transmission of power could be efficiently applied to oil drilling and improve the antiquated methods he saw in use in the early 1900s in Russia.
A small, yet high-horsepower electric motor was needed, but limitations imposed by the available casing sizes required a relatively small motor.
A motor of small diameter was too low in 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 was designing 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, and the entire unit was suspended in the well on the discharge pipe. The motor, sealed from the well fluid, operated at high speed in 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.
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 was 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.
One of his pump-and-motor devices was installed in an oil well in the El Dorado field near Burns, Kansas — the first equipment of its kind to be used in a well. 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 even 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
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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.
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 13, 2024. Original Published Date: April 29, 2014.
Drilling in about 150 feet of water, the semi-submersible platform Sedco 135 suffered a blowout 50 miles off Mexico’s Gulf Coast. The state-owned company Pemex well Ixtoc 1 spilled 3.4 million barrels of oil before being brought under control nine months later. Considering the size of the spill, its environmental impact was limited, according to a 1981 report by the Coordinated Program of Ecological Studies in the Bay of Campeche.
Although the extent of environmental alterations from the Ixtoc 1 blowout remain unknown, field surveys of Campeche Sound conducted in 1979–1980 noted, “evaporation, dispersion, photo-oxidation and biodegradation processes played a major role in attenuating the harmful environmental effects of the oil spill.”
A young chemist living in New York City, Robert Chesebrough,
Robert Chesebrough consumed a spoonful of Vaseline each day and lived to be 96 years old. Photo courtesy Drake Well Museum.
When the 22-year-old chemist visited the new Pennsylvania oilfields in 1865, he had noted that drilling was often confounded by a paraffin-like substance that clogged the wellhead. Drillers used the “rod wax” as a quick first aid for abrasions.
Chesebrough returned to New York City and worked in his laboratory to purify the oil well goop, which he first called “petroleum jelly.” Female customers would discover that mixing lamp black with Vaseline made an impromptu mascara. In 1913, Mabel Williams employed just such a concoction, and it would lead to the founding of a major cosmetic company.
Learn more in The Crude History of Maybel’s Eyelashes.
After weeks of thunderstorms in Pennsylvania’s Oil Creek Valley, the Spartansburg dam on Oil Creek burst, sending torrents of water that killed more than 100 people and destroyed homes and businesses in Titusville and Oil City. The disaster was compounded when fires broke out.
Titusville, Pennsylvania, residents used the “Colonel Drake Steam Pumper” during the great flood and fire of 1892. Photo courtesy Drake Well Museum.
“This city during the past twenty-four hours has been visited by one of the most appalling fires and overwhelming floods in the history of this country,” reported the New York Times from Oil City. Oilfield photographer John A. Mather — who lost his studio and 16,000 glass plate negatives — documented the destruction, which preceded the Johnstown Flood by six years.
Learn more in Oilfield photographer John Mather.
Driving the first car he ever built, Henry Ford left a workshop behind his home on Bagley Avenue in Detroit, Michigan. He had designed his “Quadricycle” in his spare time while working as an engineer for Edison Illuminating Company. Ford chose the name because his handmade, 500-pound “horseless carriage” ran on four bicycle tires. Inspired by advancements in gasoline-fueled engines, he founded Henry Ford Company in 1903.
A team of earth scientists tested an experimental seismograph device on a farm three miles north of Oklahoma City and determined it could accurately map subsurface structures. Led by Prof. John C. Karcher and W.P. Haseman, the team from the University of Oklahoma found that seismology could be useful for oil and natural gas exploration and production. Further seismic reflection tests, including one in the Arbuckle formation in August, confirmed their results.
The federal government taxed gasoline for the first time when the Revenue Act of 1932 added a one-cent per gallon excise tax to U.S. gasoline sales. The first state to tax gasoline had been Oregon, which imposed a one-cent per gallon tax in 1919. Colorado, New Mexico, and other states followed. The federal tax, last raised on October 1, 1993, has remained at 18.4 cents per gallon (24.4 cents per gallon for diesel). About 60 percent of federal gasoline taxes are used for highway and bridge construction.
As the D-Day invasion began along 50 miles of fortified French coastline in Normandy, logistics for supplying the effort would include two top-secret engineering feats — construction of artificial harbors followed by the laying of pipelines across the English Channel.
Operation PLUTO (Pipe Line Under The Ocean) unspooled flexible steel pipeline across the English Channel, but the channel was deep, the French ports distant.
Code-named “Mulberrys” and using a design similar to modern jack-up offshore rigs, the artificial harbors used barges with retractable pylons to provide platforms to support floating causeways extending to the beaches.
To fuel the Allied advance into Nazi Germany, Operation PLUTO (Pipe Line Under The Ocean) used flexible steel pipelines wound onto giant “conundrums” designed to spool off when towed. Gen. Dwight Eisenhower later acknowledged the vital importance of the oil pipelines.
Learn more in PLUTO, Secret Pipelines of WW II.
With a fortune reaching $6 billion (about $32 billion in 2023), J. Paul Getty died at 83 at his estate near London. Born into his father’s petroleum wealth from the Oil Company of Tulsa, Getty made his first million by age 23 from buying and selling oil leases. “I started in September 1914, to buy leases in the so-called red-beds area of Oklahoma,” Getty told the New York Times. “The surface was red dirt and it was considered impossible there was any oil there. My father and I did not agree and we got many leases for very little money which later turned out to be rich leases.”
Getty, who incorporated Getty Oil in 1942, would leave more than $660 million of his estate to the J. Paul Getty Museum in Los Angeles.
A contractor hired by the town of Corsicana to drill a water well on 12th Street found oil instead, launching the Texas petroleum industry seven years before a more famous discovery at Spindletop hundreds of miles to the southeast.
Drilled using cable-tools, Corsicana’s first oil well produced just 2.5 barrels of oil a day from 1,035 feet deep, but nevertheless brought a rush of exploration companies. By 1898, about 300 produced oil in and around the boom town, which became a center for technological innovation. A Corsicana company manufactured the patented rotary rig that drilled the famous 1901 gusher at Spindletop Hill near Beaumont, Texas.
Petroleum transformed Corsicana, Texas, into an oilfield service and industrial center where residents have annually celebrated their oil patch heritage. A colorized postcard depicts Navarro County oil wells, circa 1910.
Despite Corsicana’s discovery well bringing petroleum riches and the drilling boom, city officials paid the contractor only half of the $1,000 fee, citing the agreement for completing a water well. Since 1976 Corsicana has hosted an annual Derrick Days, including a car show and oil history tours. The town also is home to Wolf Brand Chili, established there in 1895 — thanks to the oil boom.
Learn more in First Texas Oil Boom.
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Recommended Reading: Western Pennsylvania’s Oil Heritage
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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.
When an Oklahoma drilling boom arrived in 1919 thanks to shallow wells in the Healdton oilfield, a 27-year-oid inventor applied his new method for cementing oil wells. His service company would become one of the largest in the world.
Erle Palmer Halliburton (1892-1957) received a U.S. patent for his “Method and Means for Cementing an Oil Well in 1921 during Oklahoma drilling booms in and around the Healdton oilfield. He had arrived in Duncan after working for service companies in North Texas towns, including boom town Burkburnett.
The Healdton Oil Museum includes IPAA founder Wirt Franklin’s Pierce-Arrow. The museum hosts annual oil history events.
Halliburton’s New Method Oil Well Cementing Company would receive many patents on its way to becoming Halliburton Corporation, which in 2022 employed 42,000 worldwide specializing in “locating hydrocarbons and managing geological data, to drilling and formation evaluation, well construction and completion, and optimizing production through the life of the field.”
The Healdton field was first revealed in August 1913 by the Wirt Franklin No. 1 well about 20 miles northwest of Ardmore. The wildcat well discovered what soon became known as the “poor man’s field,” because of its shallow depth and low cost of drilling.
The Carter County oilfield, about 70 miles east of Burkburnett, quickly attracted independent producers with limited financial backing — often edging out major oil company competitors.
“Within a 22-mile swath across Carter County, one of the nation’s greatest oil discoveries was made — the Greater Healdton-Hewitt Field,” reported Kenny Arthur Franks in his 1989 history of the oilfield.
“Encompassing some of the richest oil-producing land in America, Healdton and Hewitt, discovered in 1913 and 1919 respectively, produced an astounding 320,753,000 barrels of crude by the close of the first half of the 20th century,” Franks explained.
Erle P. Halliburton Halliburton in 1957. Photo courtesy Oklahoma Hall of Fame.
In addition to launching Halliburton’s petroleum career, the shallow field also helped independent producer Wirt Franklin in 1929 become the first president of the then Tulsa-based Independent Petroleum Association of America (IPAA).
The Healdton Oil Museum preserves Franklin’s and other independent producers’ exploration heritage — and many who got their start in the Healdton field. Among them were former Oklahoma Governor Charles Haskell and Roy Johnson, president of the Healdton Petroleum Company.
According to the Oklahoma Historical Society (OHS), the towns of Wilson, Ringling, and New Healdton (now Healdton) came into existence during the oilfield’s development. Just a few who began their careers there were Robert Hefner Sr. and Lloyd Noble.
“Hefner, a lawyer, introduced the concept of subsurface leasing into mineral rights law,” OHS notes. “Noble developed an international oil business and established the Samuel Roberts Noble Foundation, a nonprofit biotechnology research foundation that helps farmers.”
Born in Ardmore in 1896, Noble found early success at Healdton — and at the Seminole oil boom in 1926.
Noble also was instrumental in the success of a top-secret drilling project during World War II (see Roughnecks of Sherwood Forest).
Healdton drilling boom and its many shallow wells, Halliburton established his New Method Oil Well Cementing in Duncan. He was soon experimenting with technologies to improve oil well production. Water intrusion hampered many wells, requiring time and expense for pumping out.
Halliburton noted in his 1920 patent application, “Water has caused the abandonment of many wells which would have developed a profitable output.”
The oilfield cementing innovation — at first resisted by some skeptics — isolated the various down-hole zones, guarded against collapse of the casing and permitted control of the well throughout its producing life.
The city of Duncan, Oklahoma, dedicated a Halliburton statue in 1993.
According to William Pike, former editor-in-chief of E&P magazine, Halliburton’s well cementing process revolutionized how oil and natural gas wells were completed.
Halliburton also patented other modern cementing technologies, including the jet mixer, the remixer and the float collar, guide shoe and plug system, bulk cementing, multiple-stage cementing, advanced pump technology and offshore cementing technology.
Halliburton’s only real service company competitor for decades was Carl Baker of Baker Oil Tools. Halliburton Oil Well Cementing Company in 1938 expanded into offshore work with a barge-mounted unit cementing a well off the Louisiana coast.
Meanwhile, another Oklahoma oilfield service company, the Reda Pump Company, had been founded by Armais Arutunoff, thanks to help from his close friend Frank Phllips and Phillips Petroleum of Bartlesville, Oklahoma.
Arutunoff invented a practical electric submersible pump). As Phillips foresaw, use of the Arutunoff artificial lift pump would dominate U.S. oilfields by 1938 — and oilfields worldwide after World War II.
A major petroleum industry milestone came in 1949, when Halliburton and Stanolind Oil Company completed a well near Duncan, Oklahoma – the first commercial application of hydraulic fracturing (see Shooters – A “Fracking” History).
“Halliburton was ever the tinkerer. He owned nearly 50 patents,” noted Pike. “Most are oilfield, and specifically cementing related, but the number includes patents for an airplane control, an opposed piston pump, a respirator, an airplane tire and a metallic suitcase.”
Thanks in part to his prospering oilfield service company, Halliburton in 1931 started his own airline in Tulsa, the Southwest Air Fast Express — Safeway Airlines — that later merged with American Airlines.
As U.S. production from oil and natural gas shale formations grew in 2018, Halliburton Corporation’s worldwide operations employed 80,000 people.
Learn more about Halliburton’s oilfield inventiveness in Halliburton cements Wells.
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Recommended Reading: Ragtown: A History of the Greater Healdton-Hewitt Oil Field (1989); Erle P. Halliburton: Genius with Cement
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The American Oil & Gas Historical Society (AOGHS) preserves U.S. petroleum history. Please become an AOGHS supporter and help maintain this energy education website and expand historical research. For more information, contact bawells@aoghs.org. © 2024 Bruce A. Wells.
Citation Information – Article Title: “Halliburton and the Healdton Oilfield.” Authors: B.A. Wells and K.L. Wells. Website Name: American Oil & Gas Historical Society. URL: https://aoghs.org/petroleum-pioneers/halliburton-and-healdton-oilfield. Last Updated: June 3, 2024. Original Published Date: July 14, 2015.
Beman Dawes and Fletcher Heath organized the Ohio Cities Gas Company in Columbus, Ohio, before building an oil refinery in West Virginia. Ohio Cities Gas acquired Pennsylvania-based Pure Oil Company in 1917 and adopted that name three years later. Pure Oil had been founded in Pittsburgh in 1895 by independent oil producers, refiners, and pipeline operators to counter the market dominance of Standard Oil Company.
Ohio Cities Gas Company became Pure Oil in 1917.
By producing, refining and selling its products, Pure Oil became the second vertically integrated petroleum company after Standard Oil. Headquartered in a now iconic Chicago skyscraper it built in 1926, the company joined the 100 largest U.S. industrial corporations. It was acquired in 1965 by Union Oil Company of California, now a division of Chevron.
A 76-foot statue of an oilfield worker today known as “The Golden Driller” made its debut at the International Petroleum Exposition in Tulsa, Oklahoma. After several refurbishments, the 22-ton statue would contain 2.5 miles of rods and mesh with tons of plaster and concrete — withstanding winds up to 200 mph. A smaller version of Tulsa’s iconic roughneck originally appeared at the 1953 petroleum exposition as a promotion for the Mid-Continent Supply Company of Fort Worth, Texas.
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.
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.
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.
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 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 began 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.
After failing to make his fortune in Pennsylvania oilfields, John Wilkes Booth assassinated President Abraham Lincoln in Washington, D.C. 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 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 (lower left). 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.
John C. Lake of Big Prairie, Ohio, received a U.S. patent (No. 725,261) for his gasoline-fueled “Self-Heating Sad Iron.” Lake had served in the 16th Ohio Volunteer Infantry Regiment during the Civil War. His home ironing innovation brought prosperity to his Amish community, where he established the Monitor Sad Iron Company on the Pennsylvania Railroad line. The manufacturing company would make petroleum-fueled sad irons for the next 50 years.
Learn more in Ironing with Gasoline.
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Recommended Reading: The American Railroad Freight Car (1995); Story of the Typewriter, 1873-1923 (2019); Tulsa Oil Capital of the World, Images of America
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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 © 2024 Bruce A. Wells. All rights reserved.
