2.8 Years of Field Performance of High Density Polyethylene Sleeved Sinkerbars (Polybars)

Scott W. Long, Flexbar, Inc.
Don Dillingham and James M. Northcutt, Occidental Permian, Ltd.
James Franklin, BP
Albert Garza, Pioneer Natural Resources, Inc.
Ed Gibson and David Snapp, Chevron, USA

Abstract
During the past 18 years, rodstrings installed with a properly designed Sinkerbar Section have proven to reduce downstroke buckling and maintain tension in all rods. Results from use of these rodstring designs have been reduced rod-on-tubing wear and extended tubing and rod life.

During the past 5 years, use of high-density polyethylene liners in oilfield tubing has shown to increase wear resistance and reduce the coefficient of friction. Results from use of these liners in tubing have been reduced rod-on-tubing wear and extended tubing life.

These successful oil field products and their benefits have been combined to develop a high-density polyethylene sleeved Sinkerbar called a Polybar. During this test, these Polybars exhibited the resistance to buckling of a Sinkerbar with the wear resistance and coefficient of friction of polyethylene.

This paper presents results of a 2.8 year field test involving five (5)-producing wells installed with Polybars. The documented results show that no tubing leaks occurred in tubing protected by Polybars.

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