Cable-Deployed Electrical Submersible Pump Jarring Tool for Pin Release
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Solution Overview
Problem
The installation, replacement, or repair of electrical submersible pump (ESP) systems in wellbores is time-consuming and costly, often requiring a workover rig and well killing, with challenges in connecting and releasing the ESP due to the complexity of the electrical connections and the need for precise jarring operations.
Innovation Solution
A cable-deployed jarring tool with adjustable weight sections and a secondary weight mechanism is used to break release pins, ensuring reliable connection and disconnection of the ESP without a workover rig, utilizing a tool catcher for safety and a secondary weight to ensure pin breakage in case of failure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional ESP installation methods using workover rig and well killing are used, then reliable connection is achieved, but installation time and cost increase significantly
Solution Approach 1:
The installation process is segmented into distinct phases: cable deployment phase, ESP deployment phase, and connection phase. The cable is deployed first and secured at surface, then the ESP is deployed separately and connected to the cable at the wellbore bottom. This segmentation eliminates the need for well killing and workover rig, reducing installation time while maintaining connection reliability through the modular connection system.
Solution Approach 2:
The cable is deployed and secured at the surface before the ESP is deployed into the wellbore. The cable hanger is pre-positioned and the electrical connectors are prepared in advance. This preliminary action allows the ESP to be connected quickly upon deployment without requiring well killing or complex surface operations, significantly reducing installation time while ensuring reliable connections.
2Reliability
If jarring force is increased to ensure pin breakage, then release reliability improves, but risk of damaging spool or electrical connections increases
Solution Approach 1:
The jarring force is applied locally at the ESP-cable connection point at the wellbore bottom, rather than applying force throughout the entire cable system. The weight section is positioned to deliver impact force precisely where the release pin needs to break, ensuring reliable release while concentrating the force in a controlled manner that minimizes the risk of damaging the spool or electrical connections at the surface.
Solution Approach 2:
The cable is pre-tensioned and secured at the surface with the cable hanger before ESP deployment. This pre-positioning creates a controlled system where the jarring force is absorbed and directed through the cable to the release pin, cushioning against excessive force that could damage the spool or electrical connections while ensuring sufficient force to break the pin.
3Productivity
If cable deployment method is used to eliminate workover rig, then installation cost and time reduce, but complexity of electrical connections increases
Solution Approach 1:
The electrical connection system is segmented into modular components: cable hanger with electrical connectors at the surface, and ESP electrical connectors at the wellbore bottom. Each module is independently prepared and tested, then connected through the deployment process. This modular segmentation simplifies the overall complexity by breaking down the electrical connection system into manageable, standardized components that can be deployed quickly.
Solution Approach 2:
The cable serves multiple functions simultaneously: it provides mechanical support for the ESP, serves as the power transmission medium, and acts as the deployment mechanism. The cable hanger integrates mechanical anchoring and electrical connection functions in a single component. This multi-functionality reduces the number of separate systems needed, simplifying the overall deployment process while maintaining installation speed.
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
Facilitates faster and more reliable installation of ESP systems by eliminating the need for well killing and reducing downtime, ensuring secure electrical connections and efficient deployment without damaging the spool or electrical connections.
Implementation Method 1
dropping the upper weight section; and ramming a bottom of the upper weight section into a top surface of the jar section with an impact force
Implementation Method 2
catching the upper weight section and suspending it a drop distance from a top of the jar section; dropping the upper weight section
Data Source
AI summary
Improved installation speed and reliability for electrical submersible pumps may be realized through the system and methods disclosed herein. An adjustable jarring device is used to break a release pin, the force of the jarring device can be adjusted based on its height above the pin. In another aspect, the jarring device comprises a secondary weight configured to provide a second at break the shear pin of a tool without requiring resetting it. Another aspect is a tool catcher device that allows for catching and holding the jarring device and dropping it, as well as retrieval of the tool in the event the cable is disconnected.