Skillman Gusher Pump
Designed
as a heavy oil pump, the Skillman Gusher pump really performs in high
volume wells and water
floods. The idea was to create a rod pump that removes all the areas
of fluid restriction in the pump. To accomplish this, the standing
valve and traveling valve had to be redesigned along with a new
plunger design with a larger bore.
Every rod pump lift system has its limitations. The size of the casing determines how large of a pump can be used. The pumping unit has a structure and gear box load limit. The sucker rods have a load rating that is not to be exceeded.
So now it's a balancing act between pump size, stroke length, and strokes per minute. The perfect rod pump would have no restriction greater than its bore diameter, but that is not possible.
The 2-1/4” bore API tubing pump has a bore of 3.976 square inches. 2-1/4” API valve seats have a flow area of .858 square inches. That is a restriction of 463.4%. If a 2-1/4” insert guided cage made by other manufactures is being used, you may have a 612.6% restriction! The standard 2-1/4” plunger has the I.D. flow area of .994 square inches. This is greater than the valves, but still way less than the pump bore.
By increasing the plunger I.D. and both valves to 1-7/8” or 2.761 square inches, the 2-1/4” Gusher pump has at least 322% more flow area than a conventional 2-1/4” pump!
What does all this mean?
The Skillman Gusher pump is a game changer! A dynamometer is a tool used to analyze a well. It uses a load cell to do this. Rod programs use the data from thousands and thousands of dynamometer readings to create a base line for a given pump size at a given depth. The dynamometers load cell is just a scale, and the only one absolutely true measurement it can provide is the weight. All other data is interpretation, while mostly reliable, it is based on conventional API pumps and their limitations.
A load cell cannot distinguish if the load is from iron weight, fluid load, metal to metal friction, or restriction. Restriction will influence pressure that results in load. As strokes per minute are increased, the iron weight, the fluid load, and metal to metal friction remain the same and have minimal effect. The one load that has the greatest change and effect on the lift system is the restriction. The standing valve flow area does not change. The traveling valve flow area does not change. The length of stroke at the surface does not change.
As the strokes per minute are increased, more fluid has to flow through the same area in the same amount of time (one minute). That increases the pressure which increases exponentially with more strokes per minute. This pressure or increased load affects the whole lift system on both the up and down stroke. Tubing movement, sucker rod stretch, sucker rod buckling, rod on tubing wear, less plunger travel, peak structure load, peak gearbox load, and horsepower requirement. The Skillman Gusher pump will produce more fluid with fewer failures than an API rod pump.
Every rod pump lift system has its limitations. The size of the casing determines how large of a pump can be used. The pumping unit has a structure and gear box load limit. The sucker rods have a load rating that is not to be exceeded.
So now it's a balancing act between pump size, stroke length, and strokes per minute. The perfect rod pump would have no restriction greater than its bore diameter, but that is not possible.
The 2-1/4” bore API tubing pump has a bore of 3.976 square inches. 2-1/4” API valve seats have a flow area of .858 square inches. That is a restriction of 463.4%. If a 2-1/4” insert guided cage made by other manufactures is being used, you may have a 612.6% restriction! The standard 2-1/4” plunger has the I.D. flow area of .994 square inches. This is greater than the valves, but still way less than the pump bore.
By increasing the plunger I.D. and both valves to 1-7/8” or 2.761 square inches, the 2-1/4” Gusher pump has at least 322% more flow area than a conventional 2-1/4” pump!
What does all this mean?
The Skillman Gusher pump is a game changer! A dynamometer is a tool used to analyze a well. It uses a load cell to do this. Rod programs use the data from thousands and thousands of dynamometer readings to create a base line for a given pump size at a given depth. The dynamometers load cell is just a scale, and the only one absolutely true measurement it can provide is the weight. All other data is interpretation, while mostly reliable, it is based on conventional API pumps and their limitations.
A load cell cannot distinguish if the load is from iron weight, fluid load, metal to metal friction, or restriction. Restriction will influence pressure that results in load. As strokes per minute are increased, the iron weight, the fluid load, and metal to metal friction remain the same and have minimal effect. The one load that has the greatest change and effect on the lift system is the restriction. The standing valve flow area does not change. The traveling valve flow area does not change. The length of stroke at the surface does not change.
As the strokes per minute are increased, more fluid has to flow through the same area in the same amount of time (one minute). That increases the pressure which increases exponentially with more strokes per minute. This pressure or increased load affects the whole lift system on both the up and down stroke. Tubing movement, sucker rod stretch, sucker rod buckling, rod on tubing wear, less plunger travel, peak structure load, peak gearbox load, and horsepower requirement. The Skillman Gusher pump will produce more fluid with fewer failures than an API rod pump.