Hydraulic Pump Spacing Device for Polished Rod Adjustment
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Solution Overview
Problem
Current methods for adjusting the spacing between a polished rod and a carrier bar in artificial lift systems are labor-intensive and pose safety risks due to the need for manual elevation and repeated operation of the pumping unit.
Innovation Solution
A portable hydraulic lifting device that uses two or more hydraulic cylinders to lift the polished rod, creating a gap between the carrier bar and the polished rod clamp, and a clamshell spacer that can be inserted from ground level to adjust the spacing without requiring changes to the wellhead, enhancing safety and reducing labor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual methods (ladder/elevating device) are used to adjust polished rod spacing, then the pumping unit can be accessed for adjustment, but labor requirements increase and workplace safety deteriorates
Solution Approach 1:
A portable hydraulic lifting device is introduced as an intermediary tool between the operator and the polished rod. The device includes a lifting platform that can be positioned at the wellhead and hydraulic cylinders that lift the polished rod and carrier bar assembly, enabling safe ground-level adjustment of spacing without requiring operators to climb ladders or use elevating devices.
2Ease of operation
If the pumping unit is started and stopped multiple times for adjustment, then spacing can be modified, but productivity decreases and time is lost
Solution Approach 1:
The portable hydraulic lifting device enables preliminary lifting and positioning of the polished rod and carrier bar assembly before any spacing adjustments are made. This allows the polished rod clamp to be repositioned and spacers to be installed while the pumping unit remains stationary, eliminating the need for repeated start-stop cycles and maintaining production continuity.
3Adaptability or versatility
If temporary polished rod clamp and suitcase device are used, then spacing adjustment is possible, but device complexity increases and ease of operation deteriorates
Solution Approach 1:
The lifting platform and hydraulic cylinders are integrated into a single portable device that combines the functions of support, lifting, and positioning. This merged design eliminates the need for separate temporary clamps and suitcase devices, reducing overall system complexity while maintaining spacing adjustment capability. The device can be easily transported and deployed at the wellhead without requiring installation of permanent modifications.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution allows for safe and efficient adjustment of the polished rod spacing, reducing labor requirements and improving workplace safety by enabling the adjustment of the polished rod clamp position and insertion of spacers from ground level, thus minimizing the need for manual elevation and repeated operation of the pumping unit.
Implementation Method 1
two or more hydraulic cylinders to lift the polished rod
Data Source
AI summary
A portable lifting device is provided for adjusting pump spacing of a production well. The lifting device rests directly on a well head flange and provides an expansive force between the flange and a temporary polish rod clamp or collet device is attached to a polished rod extending into the well head. The device includes first and second hydraulic cylinders for simultaneously lifting the polished rod to provide a gap between a carrier bar and a polished rod clamp.