Downhole Tool Damping Assembly Shock Absorption

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Downhole tools experience irreparable damage due to impact and shock loading during tripping in and out of boreholes, leading to premature fatigue failures.

Innovation Solution

A damping assembly with a piston assembly, biasing member, and damping block connected to a downhole tool, which reduces shock impacts by using a damping device that includes a body with a piston chamber and nozzle to create differential pressure, mitigating the effects of shocks and preventing premature shearing of the connector.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If downhole tools are deployed and retrieved through boreholes, then tool deployment and retrieval operations can be performed, but impact and shock loading causes premature fatigue failures and irreparable damage

Engineering Contradiction:

Improvetool durabilityVSAvoidshock loading

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

A damping assembly is attached to the downhole tool before deployment to provide shock absorption during tripping operations. The damping assembly includes a damping element that absorbs impact energy, preventing premature fatigue failures and damage during tool deployment and retrieval through the borehole.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The damping assembly acts as an intermediary between the downhole tool and the shock loads encountered during tripping. It absorbs and dissipates impact energy, protecting the downhole tool from direct exposure to harmful shock loading while allowing normal operational forces to pass through.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If damping assembly is added to protect against shocks, then tool reliability improves, but device complexity increases

Engineering Contradiction:

Improveshock protectionVSAvoidassembly structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The damping assembly is designed as a separate, modular component that can be attached to the downhole tool independently. This segmentation allows the damping function to be added without redesigning the entire downhole tool, maintaining simplicity while improving reliability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The damping assembly serves as an intermediary component between the downhole tool and shock loads, providing protection without requiring integration into the tool's core structure. This approach adds minimal complexity while achieving the desired shock protection.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 damping assembly effectively reduces the impact of shocks on downhole tools, preventing premature shearing and fatigue failures, allowing for safer and more reliable deployment and retrieval of tools.

Implementation Method 1

a biasing member biasing the piston rod to a position within the body

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

create differential pressure, mitigating the effects of shocks

Methodology Applied

Scientific EffectDifferential pressure: Pressure Gradient

Data Source

PatentUS8826993B2Damping assembly for downhole tool deployment and method thereof

Publication Date: 2014.09.09 BAKER HUGHES CO

AI summary

A damping assembly including a damping device including a body, a piston assembly having a piston rod disposed within the body, a biasing member biasing the piston rod to a position within the body, and a damping block connected to and movable with the piston rod; and, a connector associated with a downhole tool and connectable to the damping device; and wherein the damping device reduces effects of shocks experienced by the downhole tool via the damping block. Also included is a method of reducing impact of shocks on a downhole tool during tripping.