Surface Machinery and Methods for Oil-Well Pumping

48 SURFACE MACHINERY AND METHODS FOR OIL-WELL PUMPING.
Oil is used as fuel for the boilers, and 135 barrels are used daily
to produce the 1,600 to 1,800 kilowatts of electric power generated.
The cost of the power, including depreciation of plant, maintenance,
and operating costs, is about 2 cents a kilowatt. The electric power
generated is distributed to 16 different pumping properties, where it
is stepped down to 440 or 220 volts. The wells are all pumped on
the beam. They range in depth from 2,000 to 3,000 feet, and are
equipped with 21 or 3 inch tubing.
The electric power is used for all field purposes, including drilling
and pumping of wells and running pumps and compressors; it is
changed to direct current for the treatment of emulsion, which is
high in the oil produced.
The distribution of the electric power is shown in Table 3.
TABLE 3.-Monthly distribution of power.
Kilowatts.
Circuit No. 5 water-circulating pump and cooling pump ------------ 48, 600
Treating plant (direct current) -_____ -___ 13, 800
Drilling rig-__-______-_ 4, 500
Field water-supply-------------------- 39, 005
Blowing oil wells, two or more wells on synchronous motor---------201, 240
Miscellaneous: Lighting, etc_- _________----- ------------------ 6, 333
Portable well washer______________ ________ -----------------------------------------1, 260
Motors, B. S. pumps 4, 567
Pipe-line oil -------------------------------------------------- 199
Miscellaneous pumps------------------------------------ ------770
Mud pumps---------------------------------- -------------- 120
Power used for pumping 56 wells on the beam (counter balanced) ... 185, 106
Total power (actual output)____________--------------------- 505, 000
Average of 16,833 kw. per day.
The maintenance of this plant for the first 13 months was $1,647.19
a month, the operating cost $4,458.12 a month, and the depreciation
$3,486.47 a month.
PURCHASED ELECTRIC POWER.
The following information, given to the writer by the San Joaquin
Light and Power Corporation of California, shows the basis upon
which electric power is supplied to the oil companies by public
service corporations:
Oil-field service is covered by Schedule P-4, which is the general oil-field
service rate, and also Schedule P-5, which is the wholesale power service rate.
Under this latter rate service is sold to some of the large companies whose
requirements are such as to bring them under this classification.
You will note that under Schedule P-4 that this rate is applicable to service
supplied equipment for pumping of oil wells, operating and gathering pumps,
leased line pumps and dehydrating plants, in connection with the actual pro-
duction of oil. This is not applicable to service to tank farms or booster sta-

George, H. C. Surface Machinery and Methods for Oil-Well Pumping. Washington D.C.. UNT Digital Library. http://digital.library.unt.edu/ark:/67531/metadc12407/. Accessed December 17, 2014.