A sucker rod is the
connecting link between the surface pumping unit and the subsurface pump, which
is located at or near the bottom of the oil well. Technical Data used in the
field explained in diploma
in petroleum engineering, The vertical motion of the surface pumping
unit is transferred to the subsurface pump by the sucker rods.
Two types of sucker
rods are in use today-steel rods and fiberglass-reinforced plastic sucker rods.
It is estimated that slightly less than 90 % of the rods sold in 1985 were
steel rods, while slightly more than 10% were fiberglass rods.
One-piece steel sucker
rods are manufactured from hot-rolled steel finished with a special quality
surface. The surface finish of the rod is very important, because rods fail
prematurely as a result of discontinuities on the surface. These discontinuities
can cause stress concentration that results in fatigue cracks. Some more
details of diploma
in petroleum engineering are as under.
The first operation in
manufacturing a sucker rod is straightening the rod. In the second operation,
the end of the rod is heated to about 2,250”F. and the lower bead, wrench
square, pin shoulder, and pin are upset forged. The next operation is
full-length heat treating. Heat treating develops the desired physical properties
in the rod and provides a uniform surface structure to minimize corrosion.
The type of heat
treatment depends on the chemistry of the rod and the desired physical
properties. Normalizing, normalizing and tempering, quenching and tempering,
and surface hardening are heat treatments in use today. TSK Training for Skills
and Knowledge is the best institute in Rawalpindi Islamabad for Pakistani
Students who wants to join diploma in petroleum technology.
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