Setting Tool Pressure Shock Absorber Sleeve Mechanism
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Solution Overview
Problem
Existing setting tools for wellbores face damage due to high fluid pressure levels used to seat the ball and actuate the liner hanger, which can lead to inefficiencies and tool failure.
Innovation Solution
A setting tool design featuring a housing, mandrel, and a movable sleeve with a biasing member, which includes bypass ports and a locking mechanism to manage fluid flow and pressure, allowing the sleeve to block fluid flow and prevent damage from high pressure hammer effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high fluid pressure is used to seat the ball and actuate the liner hanger, then the liner hanger can be effectively set, but the setting tool suffers damage from pressure hammer effects
Solution Approach 1:
A bypass passage is introduced as an intermediary fluid path that allows pressure to be diverted away from the setting tool's structural components. The bypass passage redirects excess pressure fluid flow around the mandrel and shearable connection, preventing direct pressure hammer impact on the tool while still allowing the necessary pressure to actuate the liner hanger slips against the cone.
2Force
If high fluid pressure is applied to actuate the liner hanger, then the slips can frictionally engage the liner string, but shearable components in the setting tool may fail due to excessive force
Solution Approach 1:
The harmful high-pressure fluid flow is extracted from the main tool bore and redirected through a separate bypass passage. This extraction removes the damaging pressure hammer effect from the tool's structural path while preserving the necessary pressure application to the liner hanger actuation mechanism through the drift and slips.
Solution Approach 2:
The fluid flow path is segmented into two separate paths: a main path through the mandrel for actuation, and a bypass path around the mandrel for pressure relief. This segmentation allows independent control of actuation pressure and structural loading, enabling effective liner hanger setting while protecting shearable components from excessive forces.
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 tool effectively manages high fluid pressures, preventing damage and ensuring reliable operation by redirecting fluid flow and reducing the force exerted on shearable components, thus enhancing the longevity and performance of the setting tool.
Implementation Method 1
a biasing member for biasing the sleeve towards the second position
Implementation Method 2
fluid pressure levels used to seat the ball and/or actuate the liner hanger cause damage to the setting tool
Data Source
AI summary
A setting tool includes a housing, a mandrel disposed in a bore of the housing, a sleeve disposed between the mandrel and the housing, the sleeve movable from a first position to a second position, a biasing member for biasing the sleeve towards the second position, a first fluid flow path through a bore of the mandrel, and a second flow path in an annulus formed between the mandrel and the housing, wherein the sleeve blocks fluid flow through the second flow path when the sleeve is in the second position.