Temperature-Controlled Bracing Drilling Tool

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Solution Overview

Problem

Conventional directional drilling tools face challenges such as high maintenance costs, complex control systems, frequent interruptions for alignment adjustments, and limited ruggedness due to the use of shape memory alloys and multiple components, which hinder continuous and efficient deep directional drilling.

Innovation Solution

A drilling tool with temperature-controlled bracing devices using heat-expandable pressure media, such as solids and liquids, to generate directing forces for alignment, allowing for continuous operation with reduced components and simplified control, enabling precise directional control without external intervention.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If conventional shape memory alloys and multiple components are used for directional control, then steering capability is achieved, but device complexity and maintenance requirements increase

Engineering Contradiction:

Improvesteering capabilityVSAvoidcomponent complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent extracts and eliminates the shape memory alloy components from the directional drilling system, replacing them with a simpler hydraulic piston-cylinder mechanism. This removal of complex components directly reduces device complexity while maintaining the essential steering capability through alternative means.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent replaces the mechanical shape memory alloy system with a hydraulic actuation system using pistons and cylinders. This substitution transitions from a complex mechanical phase-change material system to a more straightforward hydraulic mechanical system that is easier to maintain and control.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Manufacturing precision

If frequent alignment adjustments are made to maintain directional accuracy, then wellbore path precision is improved, but productivity decreases due to drilling interruptions

Engineering Contradiction:

Improvewellbore path precisionVSAvoiddrilling continuity

Core Design Contradiction:

Manufacturing precisionVSProductivity

Solution Approach 1:

The patent implements a dynamic bracing device system that can be continuously adjusted during drilling operations. The hydraulic pistons enable real-time modification of bracing element positions and forces, allowing the system to adapt to changing wellbore conditions without requiring drilling interruptions for alignment adjustments.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent enables continuous directional control throughout the drilling process by maintaining actively engaged bracing devices that can be adjusted on-the-fly. This continuous action eliminates the need to stop drilling for alignment corrections, as the bracing system dynamically maintains the desired wellbore path throughout operation.

Inventive Principle:

Principle #20Continuity of useful action

3Manufacturing precision

If multiple bracing devices with radially alignable force components are used, then directional control precision is improved, but ease of operation deteriorates due to complex control requirements

Engineering Contradiction:

Improvedirectional control precisionVSAvoidcontrol simplicity

Core Design Contradiction:

Manufacturing precisionVSEase of operation

Solution Approach 1:

The patent designs the bracing devices with universal hydraulic actuation mechanisms that can control multiple bracing elements through a common control system. The hydraulic piston-cylinder assembly serves multiple functions by adjusting different bracing elements sequentially or simultaneously, simplifying the overall control architecture despite the presence of multiple active components.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 achieves low-maintenance, continuous directional drilling with reduced component complexity, enabling real-time control and increased maintenance intervals, while maintaining alignment and steering capabilities without residual elongation issues.

Implementation Method 1

The actuating means can be operated by activating at least one heat-expandable pressure medium

Methodology Applied

Scientific EffectThermal expansion: Thermal Expansion

Implementation Method 2

at least one heating device for the purpose of heating the pressure medium

Methodology Applied

Scientific EffectHeating: Heating

Data Source

PatentUS10914119B2Drilling tool for sinking automatically directionally monitored bores

Publication Date: 2021.02.09 SMART DRILLING GMBH

AI summary

A drilling tool includes a tubular housing, a bit drive shaft configured to rotate in the housing and support a rotary drill bit at a lower end of the bit drive shaft, and a plurality of bracing devices arranged in the housing. The drilling tool also includes a control device configured to actuate the bracing devices, wherein the bracing devices include anchoring elements and an actuator assembly to which the anchoring elements are coupled The anchoring elements are distributed over the circumference of the housing, wherein the anchoring elements are movable radially outwardly and inwardly and are configured to be retracted into grooves in the housing The radial movability of said anchoring elements is temperature-controlled by the actuator assembly which includes at least one heat-expandable pressure medium, and wherein the pressure medium includes at least one of a gas and a liquid.