Rotary Transformer Contactless Power Transmission Drilling Rig

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Solution Overview

Problem

Power transmission to rotating components of drilling rigs is hindered by entanglement of wiring and frictional issues, which affects the efficiency and reliability of drilling operations.

Innovation Solution

The implementation of rotary transformers that use magnetic flux to induce electric current in rotating components without physical contact, allowing for contactless power transmission and reducing frictional heat and spark generation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional wiring is used to transmit power to rotating components, then power transmission is achieved, but wiring entanglement and friction occur

Engineering Contradiction:

Improvepower transmission reliabilityVSAvoidwiring entanglement and friction

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the mechanical wiring system with an electromagnetic field-based power transmission system. The rotary transformer uses magnetic coupling between a stationary primary winding and a rotating secondary winding to transmit power without physical contact, eliminating the mechanical constraints and friction associated with traditional wiring.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces magnetic flux as an intermediary medium to transfer power from the stationary primary winding to the rotating secondary winding. This magnetic field mediator enables energy transmission across the air gap without requiring direct physical connection, thus avoiding wiring entanglement and friction.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Use of energy by moving object

If physical contact power transmission is used, then power is delivered to rotating components, but frictional heat and spark generation occur

Engineering Contradiction:

Improvepower delivery to rotating componentsVSAvoidfrictional heat and sparks

Core Design Contradiction:

Use of energy by moving objectVSObject-generated harmful factors

Solution Approach 1:

The patent substitutes mechanical contact-based power transmission with electromagnetic induction-based power transmission. The contactless rotary transformer eliminates friction and spark generation by using magnetic coupling instead of physical contact between the power source and rotating components.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Object-affected harmful factors

If rotary transformer is implemented for contactless power transmission, then friction and wiring entanglement are eliminated, but device complexity increases

Engineering Contradiction:

Improvefriction and wiring entanglementVSAvoidrotary transformer structure

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The rotary transformer is designed to perform multiple functions within a single integrated structure: power transmission, rotational coupling, and positional sensing. This multi-functionality reduces the need for separate components and minimizes overall system complexity despite the advanced power transmission capability.

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

This solution enables efficient and reliable power transmission to rotating components of drilling rigs, preventing entanglement and reducing frictional heat, thereby enhancing drilling efficiency and safety.

Implementation Method 1

The stationary input winding of the rotary transformer is configured to electrically couple with a power source to receive a first electric current and generate a magnetic flux through the rotating power output winding to induce a second electric current in the rotating output winding without physical contact between the stationary input winding and the rotating output winding

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS10107036B2Rotary transformer for power transmission on a drilling rig system and method

Publication Date: 2018.10.23 NABORS DRILLING TECHNOLOGIES USA INC

AI summary

The present disclosure is directed to a drilling system. The drilling system includes drill string actuation mechanism having a first component and a second component configured to be rotated relative to the first component by a driving mechanism of the drill string actuation mechanism. The drilling system also includes a rotary transformer having a power input winding and a rotating power output winding. The power input winding is configured to be coupled to a power source and to the first component of the drill string actuation mechanism, and the rotating power output winding is configured to be coupled to the second component of the drill string actuation mechanism.