Cable-Deployed ESP Jarring Tool for Reliable Release Pin Break
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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, and there is a need for a faster and more reliable method to electrically connect and release the ESP without damaging the spool or electrical connections.
Innovation Solution
A cable-deployed jarring tool with an adjustable upper weight section and jar section is used to break the release pin, featuring a secondary weight for backup and a tool catcher to ensure secure deployment and retrieval of the ESP, allowing the ESP to be installed without a workover rig and well killing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional ESP installation methods using workover rig and well killing are used, then reliable installation is achieved, but installation time and cost increase significantly
Solution Approach 1:
The patent extracts and eliminates the workover rig and well killing steps from the traditional ESP installation process. By using a cable-deployed system, the installation is performed through the existing wellbore without requiring workover equipment or well shutdown, thereby maintaining reliability while dramatically reducing installation time and cost.
Solution Approach 2:
The patent introduces a cable as an intermediary medium to deploy the ESP system. The cable serves as both the deployment mechanism and the power transmission medium, allowing the ESP to be installed and operated without traditional workover rig methods, thus resolving the contradiction between reliability and installation time.
2Ease of manufacture
If traditional ESP installation methods are used, then ESP can be installed, but cost and preparation time increase
Solution Approach 1:
The patent removes the time-consuming preparation steps of well killing and workover rig spudding from the installation process. The cable deployment method allows direct installation through the existing wellbore, making the process easier and faster while reducing preparation time significantly.
3Ease of operation
If jarring device is used to break release pin, then ESP can be released from landing equipment, but risk of damaging spool or electrical connections exists
Solution Approach 1:
The patent employs a dynamically adjustable jarring device where the weight can be modified based on the depth and conditions. This dynamic adjustment allows the jarring force to be optimized for each specific situation, enabling easy release of the ESP while minimizing the risk of damaging the spool or electrical connections by avoiding excessive force.
Solution Approach 2:
The patent changes the parameters of the jarring device by allowing weight adjustment. By modifying the weight parameter according to deployment depth and conditions, the system achieves easy release operation while controlling the harmful effects of excessive jarring force on the spool and electrical connections.
4Productivity
If power cable is used to deploy ESP, then installation speed increases, but risk of cable disconnection increases
Solution Approach 1:
The patent incorporates a safety mechanism that acts as beforehand cushioning against cable disconnection. The system includes features such as a safety latch or locking mechanism on the cable hanger that prevents accidental disconnection during deployment, thereby maintaining high installation speed while protecting connection reliability.
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
This method significantly reduces installation time and cost by using the power cable itself for ESP deployment, ensuring reliable connection and disconnection of the ESP, and minimizing damage to the spool and 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; wherein the impact force resulting from the ramming of the upper weight section is transferred to a primary shear pin in a tool below
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.