Sucker Rod Support Tool for Well Suspension
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Solution Overview
Problem
The process of suspending and reactivating oil or gas wells is costly and time-consuming due to the need for frequent removal and replacement of sucker rod assemblies, which are prone to corrosion and require extensive service rig operations.
Innovation Solution
A support tool and method for temporarily supporting sucker rod assemblies within the well, allowing for safe suspension and preservation by resting on the top edge of the tubing string inlet or upper extension, enabling injection of anti-corrosion fluids and reducing the need for frequent removal and replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sucker rod assemblies are removed and replaced during well suspension and reactivation, then the well can be properly suspended and protected from pollution, but the operational costs and time required increase significantly
Solution Approach 1:
A support tool is introduced as an intermediary device between the sucker rod assembly and the wellhead. This support tool allows the sucker rod assembly to be temporarily supported and suspended without requiring complete removal and replacement, thereby reducing service rig operation time while maintaining well suspension protection.
Solution Approach 2:
The support function is extracted from the sucker rod assembly itself and provided by a separate support tool. This allows the sucker rod assembly to be suspended independently without requiring service rig operations for removal and replacement, reducing operational time and costs.
2Reliability
If sucker rod assemblies are removed during well suspension, then the wellhead can be properly secured, but equipment corrosion and damage occur requiring replacement
Solution Approach 1:
The support tool serves as a mediator that secures the wellhead while supporting the sucker rod assembly in place. This eliminates the need to remove the sucker rod assembly for wellhead security, preventing corrosion and damage that would require replacement.
Solution Approach 2:
The support tool is installed before wellhead closure to provide preliminary support for the sucker rod assembly. This preliminary action allows the wellhead to be secured without removing the sucker rod assembly, preventing subsequent corrosion and damage.
3Ease of operation
If service rig operations are used for continuous sucker rod assembly construction and disassembly, then the well can be serviced, but operational costs increase due to overtime requirements
Solution Approach 1:
The support function is extracted from continuous service rig operations and provided by a dedicated support tool. This allows well servicing to proceed without continuous service rig intervention, eliminating overtime requirements while maintaining servicing capability.
Solution Approach 2:
The support tool enables the well servicing system to support itself during suspension operations without requiring continuous service rig intervention. The sucker rod assembly can be suspended and supported by the support tool without ongoing external service operations.
Data Source
AI summary
A tool for use in suspending operation of an oil or gas well driven by an artificial lift with a polished rod connected to a sucker rod in a tubing string. The tool includes a body having a lower narrow portion dimensioned to fit within the interior cavity of a tubing string inlet or an upper extension thereof, and an upper wide diameter portion defining a substantially horizontal landing surface dimensioned to rest upon the top edge of the tubing string inlet or the upper extension thereof. The tool includes one or more sucker rod-engaging structures and one or more longitudinal slots extending through the lower narrow portion and the upper wide diameter portion to allow passage of fluid or gas through the tool when the tool is supported on the top edge of the tubing string inlet or the upper extension thereof.