Reference Loads, Pump Cards, and Incomplete Pump Fillage

Summary

This video delves into the analysis of three key pump cards that represent various issues in pump operations: fluid pound, gas interference, and blocked intake. It explains how these problems arise from insufficient fluid flow, gas compression, or intake blockages, leading to inefficient pumping, rod and tubing wear, and mechanical failure. The script emphasizes the importance of diagnosing pump conditions using these cards to improve performance and prevent damage. Understanding fluid load, intake pressure, and the impact of gas compression is crucial for identifying and resolving pump issues effectively.

Takeaways

• 😀 Fluid Pound Card indicates insufficient fluid inflow, leading to an incomplete pump fill and low intake pressure.
• 😀 Gas Interference Card occurs when gas fills the pump instead of liquid, requiring compression until the internal pressure exceeds discharge pressure.
• 😀 Blocked Intake Card happens when the intake is obstructed, leading to very low internal pressure and high fluid load readings.
• 😀 The Fluid Pound Card shows a maximum load at F Max due to the lack of sufficient fluid to fill the pump barrel.
• 😀 Gas Interference results in the fluid load from the pump card matching the fluid level but with gas being compressed inside the pump.
• 😀 Blocked Intake causes the fluid load on the pump card to be at F Max, but the internal pump pressure remains very low due to the blockage.
• 😀 The critical diagnostic process occurs between points C to D, where fluid compression and gas interference can lead to rod buckling and wear.
• 😀 Gas compression in pumps, while effective, can cause wear on rods and tubing, especially when the pump stops compressing gas.
• 😀 When diagnosing pump cards, compare fluid load on the pump card with the fluid level to identify different operational issues.
• 😀 A blocked intake leads to zero or very low pressure inside the pump barrel, causing incorrect readings of fluid load and inefficient pump operation.
• 😀 Proper diagnosis of fluid pound, gas interference, and blocked intake requires analyzing the pump card shape, fluid load, and intake conditions.

Q & A

What is the main purpose of the pump cards discussed in the transcript?

The pump cards are used to diagnose different issues in pumps by visually representing problems such as insufficient fluid inflow, gas interference, and blocked intake.

What does the Fluid Pound Card represent?

The Fluid Pound Card represents a situation where there is insufficient fluid entering the pump from the reservoir, causing the pump barrel to be incompletely filled, resulting in incomplete pump strokes and low intake pressure.

Why is the Fluid Pound Card's load displayed at F Max?

The Fluid Pound Card's load is displayed at F Max because there is a high pump displacement relative to the low fluid inflow, leading to a high load despite the incomplete pump filling.

How does gas interference impact the pump's performance, according to the script?

Gas interference occurs when gas occupies the pump barrel instead of fluid, which needs to be compressed until the internal pressure exceeds the discharge pressure, allowing the traveling valve to open and displace the fluid.

What are the consequences of gas compression in the pump?

Gas compression can cause rod buckling and tubing wear due to the excessive pressure needed to compress the gas inside the pump, leading to inefficiency and mechanical damage.

What does the Blocked Intake Card indicate?

The Blocked Intake Card indicates that the intake to the pump is blocked, preventing fluid from entering the pump barrel, even though there may be a high fluid level outside the pump.

What happens to the pressure inside the pump barrel when the intake is blocked?

When the intake is blocked, the pressure inside the pump barrel becomes very low or zero, which causes the pump load to reach F Max due to the lack of fluid entering the barrel.

Why is the load on the Blocked Intake Card higher than expected?

The load on the Blocked Intake Card is higher than expected because there is no fluid entering the pump barrel, and the internal pressure is very low, causing the pump to behave as though the intake is completely blocked.

How does the pump's internal gas pressure impact its operation during gas interference?

During gas interference, the gas pressure inside the pump needs to be compressed until it exceeds the discharge pressure, allowing the valve to open and enabling the plunger to move, but this can lead to wasted stroke and increased wear on components.

What is the significance of the 'C to D' compression curve discussed in the transcript?

The 'C to D' compression curve refers to the gas compression phase inside the pump, where the pressure gradually increases until it can open the valve and allow the plunger to move. This phase is crucial in understanding the performance of the pump during gas interference.