Wellbore Bailer With Pyrotechnic Pressure Barrier Actuation
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Solution Overview
Problem
Conventional wellbore bailer tools face challenges in efficiently depositing materials like cement into wellbores, particularly due to the need for high power requirements and limited control over the deposition process, which can result in incomplete or inefficient material placement.
Innovation Solution
A wellbore bailer system that includes a tubular body with a piston and pressure chamber, where a pyrotechnic actuator pierces a pressure barrier to expel the material, allowing for controlled and efficient deposition of cement or other fluids by utilizing a linear actuator circuit with a capacitor and transistor to generate a pyrotechnic event, enabling positive displacement of the material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional wellbore bailer tools are used to deposit material in wellbores, then material deposition can be achieved, but high power requirements and limited control result in inefficient operation
Solution Approach 1:
The system pre-pressurizes a fluid in a pressure chamber before deployment. When the puncture member pierces the pressure barrier, the pre-stored pressurized fluid immediately drives the piston to expel material, eliminating the need for high power during operation and enabling efficient material deposition with low power requirements
2Ease of operation
If conventional bailer tools are used, then material can be deposited, but control over the deposition process is limited resulting in incomplete material placement
Solution Approach 1:
The system incorporates a timer that can be programmed to activate the puncture member after a predetermined time period. This timing mechanism provides controlled activation of the material expulsion process, ensuring complete and reliable material placement by automatically initiating the deposition sequence at the appropriate moment
3Productivity
If high power systems are used for material deposition, then deposition can occur, but the system becomes less compact and more complex
Solution Approach 1:
The system replaces complex high-power mechanical drive systems with a simple pressurized fluid mechanism. The puncture member, pressure barrier, and pre-pressurized fluid chamber create a passive mechanical system that achieves material expulsion without complex motors, controllers, or high-power components, resulting in a compact and simple device design
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 system achieves efficient and controlled deposition of materials with low power requirements, allowing for compact and robust operation, and can be activated from the surface or using a timer, ensuring effective placement of materials like cement in wellbores.
Implementation Method 1
an actuator with a puncture member adapted to pierce the pressure barrier based on adjustment of the actuator from an unactuated position to an actuated position
Implementation Method 2
the piston urged by the pressurized fluid to forcibly expel the wellbore material through the outlet based on piercing of the pressure barrier by the puncture member
Data Source
AI summary
A wellbore bailer includes a bailer body that includes a top end, a tubular portion, and a nose, the tubular portion adapted to at least partially enclose a wellbore fluid and the nose including an outlet; a piston arranged in the tubular portion uphole of the wellbore fluid; a passage fluidly coupled to at least one of a pressure chamber or the fluid outlet, the pressure chamber arranged uphole of the piston and adapted to at least partially enclose a pressurized fluid; a pressure barrier arranged across the passage; and an actuator including a puncture member adapted to pierce the pressure barrier based on adjustment of the actuator from an unactuated position to an actuated position, the piston urged by the pressurized fluid to forcibly expel the wellbore fluid through the outlet based on piercing of the pressure barrier by the puncture member.