Torque-Multiplied Nozzle Removal Tool for Rigid Valve Threads

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Solution Overview

Problem

Disassembly of threadedly connected oilfield drilling components, such as inlet nozzles and pressure safety valves, is difficult due to rigid threading, especially when only a small portion of the nozzle protrudes, requiring significant force to prevent unexpected disconnection and leaks.

Innovation Solution

A portable torque transfer tool with a gear system that multiplies leverage force or torque input, using a self-centering chuck and anchoring tower to securely engage and disengage the nozzle from the valve, employing multiple gears to adjust mechanical advantage and torque direction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If great pressure is applied to threaded connections to ensure against disconnection, then connection reliability is improved, but disassembly difficulty increases

Engineering Contradiction:

Improveconnection reliabilityVSAvoiddisassembly difficulty

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The tool segments the disassembly function into two independent parts: an anchoring tower that remains stationary to provide reaction force, and a rotating head that applies torque to the threaded component. This segmentation allows the system to overcome the high friction forces created by reliable connections without requiring excessive overall force from the operator.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The anchoring tower acts as a counterforce mechanism, providing a stable reaction point that opposes the rotational force applied to the threaded component. This counterweight principle allows the tool to generate high torque at the connection point while the operator applies only moderate force to the input handle.

Inventive Principle:

Principle #8Anti-weight (Counterweight)

2Volume of moving object

If only a small portion of the nozzle protrudes from the valve body, then compactness is improved, but tool accessibility worsens

Engineering Contradiction:

Improvenozzle protrusionVSAvoidtool accessibility

Core Design Contradiction:

Volume of moving objectVSEase of operation

Solution Approach 1:

The tool head is designed to nest over the protruding portion of the nozzle, with the anchoring tower collapsing or retracting to fit within the limited space. This nesting allows the tool to engage with components that have minimal protrusion while still providing the necessary leverage and torque for disassembly.

Inventive Principle:

Principle #7Nested doll (Nesting)

3Weight of moving object

If a portable tool is used for field service, then mobility is improved, but torque multiplication capability worsens

Engineering Contradiction:

Improvetool portabilityVSAvoidtorque multiplication

Core Design Contradiction:

Weight of moving objectVSForce

Solution Approach 1:

The tool replaces the need for heavy external torque sources (such as large hydraulic systems or heavy impact wrenches) with a compact mechanical advantage system. The gear train and anchoring mechanism provide torque multiplication through pure mechanical means, eliminating the need for power-intensive components while maintaining portability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

4Force

If gears are added to multiply torque, then force multiplication is improved, but device complexity increases

Engineering Contradiction:

Improvetorque multiplicationVSAvoidgear system complexity

Core Design Contradiction:

ForceVSDevice complexity

Solution Approach 1:

The tool merges the gear train directly with the anchoring tower structure, so that the gear housing and anchoring components form an integrated assembly. This merging eliminates the need for separate mounting brackets and alignment mechanisms, reducing overall complexity while maintaining the torque multiplication function.

Inventive Principle:

Principle #5Merging (Combining)

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 efficient disconnection of threadedly connected components by multiplying torque input, allowing for effective loosening of nozzles from valves with reduced operator effort, suitable for use with pneumatic, impact, or manual tools, and adaptable to various valve sizes.

Implementation Method 1

employ geared mechanical advantage to increase the rotational pneumatic, impact, or manual force

Methodology Applied

Scientific EffectMechanical Advantage: Mechanical Advantage

Implementation Method 2

employ gears that in combination multiply the leverage force or torque inputted into the tool

Methodology Applied

Scientific EffectGear: Gear

Data Source

PatentUS11491615B2Threaded insert removal tool with torque multiplier

Publication Date: 2022.11.08 MENDOZA RAUL

AI summary

A method and device for rotational disconnection a nozzle from a valve body, to include transferring torque applied to an input adapter, through a gear system, to a rotational, self-centering chuck, with a plurality of jaws to secure a nozzle threadedly secured within a valve body, and an anchor tower extending from the base of the tool in the same direction as the tool that is positioned for nozzle release, so that the anchor tower may provide rotational fixation of the valve body while torque is applied to the nozzle, along with a manner to employ coordinatedly sized and positioned gears, which in combination multiply the leverage force or torque input into the tool for application to the rotational disconnection effort.