Surface Machinery and Methods for Oil-Well Pumping

POWER-TRANSMITTING MACHINERY.

fire of the engine house, band-wheel house, derrick, and machinery
at a well will mean a loss of $10,000, besides the loss from suspended
production during rebuilding.
One of the companies in the Coalinga field, California, has
adopted the policy of using, in all wells producing from depths
greater than 2,500 feet, concrete posts for derricks and concrete
piers under the main sill instead of redwood posts and mud sills.
Concrete foundations of this sort cost about $280, whereas redwood
timber cost $240; but concrete will last for the life of the well and
does not permit as much vibration of moving parts as timber does.
Plates X and XI give details of the type of machinery and con-
struction used by many oil companies for pumping on the beam
by electric power. This type of installation requires a countershaft
to insure the proper speed at the band wheel; consequently the
motor house must be larger than the engine house used with steam,
gas, or oil engine power.
At some recent installations the use of a countershaft has been
eliminated by coupling the electric motor used for power to a turbo-
gear, which in turn is coupled direct to the pulley driving the band
wheel. This turbo-gear reduces the speed of the pulley to one-fifth
that of the motor. (See P1. XXVIII, A, p. 110.)
Table 5 lists the machinery and material used in this type of plant.
TABLE 5.--List of machinery and material for electrical installation for beam
pumping.
Refer-
ence Amount Machinery and material Classification Plate No.
No.

Cubic yards sand and gravel....--.-.------
Sacks cement.................................
Sby 36-inch anchor bolts, hexagonal nuts, 2J inches
of threads and loop for 2-inch pipe.
$ by 48-inch anchor bolts, hexagonal nuts, 2* inches
of threads and loop for 2-inch pipe.
I by 12-inch machine bolts, hexagonal nuts........
* by 5-inch machine bolts, hexagonal nuts ........
1 inches by 15 inches old pipe...-. ...........
2 inches by 2 feet 6 inches old pipe- ............
Knockdown adjustable foundation form...........
4 by 4 inches by 12 feet, Oregon pine, rough, for
end sills.
4 by 4 inches by 16 feet, Oregon pine, rough, for
corner posts.
4 by 4 inches by 24 feet, Oregon pine, rough, for
side sills.
2 by 4 inches by 12 feet, Oregon pine, rough, for
cupola, gables, joists, plates, side girts, and studs.
2 by 4 inches by 14 feet, Oregon pine, rough, for
purlins.
2 by 4 inches by 16 feet, Oregon pine, rough, for
cupola, rafters, end girts, studs, and doors.

Foundations and
floor.
..- do ..............
---. do............
----..do----- ............---------
.....do.............
-... do..........-----
..- do.....-- ..-----
-.-..do_
___d----d__----------
8-foot motor house.__
-----..do.............
.-...do-..............
....do.. ..-----------
.....do...............
.....do...............

X, A.
Do.
Do.
Do.
Do.
Do.
Do.
X, F.
X, B.
Do.
Do.
Do.
Do.
Do.

10
45
4
4
4
7
8
4
1
2
2
2
16
4
20

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

91669*--25-----5

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 July 11, 2014.