Double-Acting Jar Compounder for Coiled Tubing
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Solution Overview
Problem
Conventional double-acting jar tools for coiled tubing operations face challenges in delivering enhanced jarring force in both directions due to limited compressive loads and space constraints, often failing to facilitate repetitive jarring within the confined well bore environment.
Innovation Solution
A double-acting compounder design featuring telescopically arranged upper and lower mandrels within an outer housing, creating variable stroke-dependent fluid chambers that store energy through fluid compression and expansion, allowing for enhanced jarring force in both upward and downward directions by adjusting chamber volumes to release stored energy effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional double-acting jar tools are used in coiled tubing operations, then jarring force can be delivered in both directions, but the tools fail to facilitate repetitive jarring due to limited compressive loads and space constraints
Solution Approach 1:
The patent employs a telescoping mandrel system where the inner mandrel is nested within the outer mandrel, allowing both mandrels to move independently during jarring operations. This nested configuration enables the tool to deliver enhanced jarring force in both directions while maintaining a compact overall size that fits within coiled tubing constraints
Solution Approach 2:
The compounder is divided into distinct functional segments including the outer housing, outer mandrel, inner mandrel, and separate fluid chambers. This segmentation allows each component to perform its specific function independently, enabling repetitive jarring operations by resetting individual segments after each jarring cycle
2Force
If conventional double-acting jar tools are used, then some jarring force enhancement is achieved, but the tools cannot deliver enhanced jarring force in both directions simultaneously due to limited compressive loads
Solution Approach 1:
The patent utilizes hydraulic fluid chambers to store and release energy during jarring operations. The fluid chambers capture compressive energy during the compression stroke and release it during the extension stroke, enabling enhanced jarring force in both directions without requiring excessive compressive loads on the coiled tubing
Solution Approach 2:
The telescoping mandrels are designed to move dynamically during jarring operations, with the inner mandrel moving relative to the outer mandrel. This dynamic configuration allows the tool to adapt its force delivery mechanism, using fluid pressure and mechanical advantage to generate enhanced jarring force in both upward and downward directions
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
Enables the delivery of enhanced jarring force in both directions, allowing for repetitive operation within the limited constraints of coiled tubing applications, thereby improving the efficiency of coiled tubing operations and accommodating the specific requirements of downhole tools.
Implementation Method 1
variable stroke-dependent volume fluid chambers that store energy through fluid compression and expansion
Implementation Method 2
variable stroke-dependent volume fluid chambers that store energy through fluid compression and expansion
Data Source
AI summary
A double-acting compounder is disclosed having a first end and a second end, and comprising an outer housing, an upper mandrel, and a lower mandrel. The outer housing defines the first end. The upper mandrel is at least partially disposed telescopically within the outer housing to define an uphole fluid chamber between the upper mandrel and the outer housing, the upper mandrel defining the second end. The lower mandrel is at least partially disposed telescopically within the outer housing to define a downhole fluid chamber between the lower mandrel and the outer housing. The uphole fluid chamber and the downhole fluid chamber each contain fluid, have a variable stroke-dependent volume, and are sealed at an uphole end and a downhole end. The upper mandrel has a first shoulder engagable with and facing a second shoulder of the lower mandrel to move the lower mandrel during at least a portion of a stroke.