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These wells were shallow by modern standards, often less than 50 meters deep, but they produced large quantities of oil. In this picture of the Tarr Farm, Oil Creek Valley, the Phillips well on the right initially produced 4,000 2 barrels per day in October, 1861, and the Woodford well on the left came in at 1,500 barrels per day in July, 1862. The oil was collected in the wooden tank pictured in the foreground. As you will no doubt notice, there are many different-sized barrels in the background. At this time, barrel size had not been standardized, which made statements like "oil is selling at $5 per barrel" very confusing (today a barrel is 159 liters (see units on p. 141). But even in those days, overproduction was something to be avoided. When the "Empire well" was completed in September 1861, it produced 3,000 barrels per day, flooding the market, and the price of oil plummeted to 10 cents a barrel. In some ways, we see the same effect today. When new shale gas fields in the US are constrained by the capacity of the existing oil and gas pipeline network, it results in bottlenecks and low prices at the production site.

NEW HIGH QUALITY YOKOGAWA AAR145-S00

Allen Bradley 1771-DA | ASCII I/O Module

Allen Bradley 1771-IL /D | Isolated Analog Input Modu...

Allen Bradley 1771-IVN | 10-30V Low True Module

Allen Bradley 1771-IXE Series D | Temperature Module ...

Allen Bradley 1771-OFE3 /B | Analog Output Module

Allen Bradley 1771-ID | Isolated Input Module *REM*

Allen Bradley 1771-KG Series B | Comm Module *NIB*

Allen Bradley 1771-SIM | I/O Simulator Module

Allen Bradley 1771-IA Series C

Allen Bradley 1771-OFE2 /B | Analog Module

Allen Bradley 1771-DMC | Control CoProcessor

Allen Bradley 1771-IGD | TTL Input Module

Allen Bradley 1771-QDC Series D

Allen Bradley 1771-IA2 Series A

Allen Bradley 1771-QI Series A

Allen Bradley 1771-DMC | Control CoProcessor *NNB*

Allen Bradley 1771-OFE2 /B | Analog Output Module