Laser Head Wellbore Drilling With Cuttings-Based Casing

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Solution Overview

Problem

Conventional wellbore drilling and casing operations are time-consuming and resource-intensive, requiring large investments in materials and equipment, which can be inefficient and costly.

Innovation Solution

Utilizing high-powered laser technology to form a wellbore and simultaneously consolidate drill cuttings into a casing by emitting a first laser beam in a downhole direction for drilling and a second laser beam in a radial direction to consolidate drill cuttings, optionally combined with mechanical rotary drilling and acoustic guidance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional wellbore drilling and casing operations are used, then wellbore formation and casing installation can be achieved, but the process is time-consuming and resource-intensive with large equipment footprint

Engineering Contradiction:

Improvedrilling efficiencyVSAvoidoperational time

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The patent combines wellbore drilling and casing formation into a single integrated process using laser energy. The laser head simultaneously performs drilling (first laser beam) and casing consolidation (second laser beam) operations that were previously separate mechanical processes, eliminating the need for sequential drilling then casing installation operations.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent replaces conventional mechanical drilling systems and casing installation equipment with a laser-based system. The laser head uses optical energy (first laser beam for drilling, second laser beam for consolidation) instead of mechanical rotation and force, significantly reducing equipment footprint and operational time.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Strength

If conventional casing materials and equipment are used, then wellbore support structure can be installed, but large investments in materials and equipment are required

Engineering Contradiction:

Improvecasing structural integrityVSAvoidcasing material quantity

Core Design Contradiction:

StrengthVSQuantity of substance

Solution Approach 1:

The patent employs a self-service mechanism where drill cuttings (normally waste material) are consolidated in-place to form the casing structure. The laser head directs a second laser beam to melt and consolidate the drill cuttings against the wellbore wall, creating a casing from the drilling byproduct itself, eliminating the need for separate casing materials.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent recovers drill cuttings that would normally be discarded and transforms them into a useful casing structure. The second laser beam melts and consolidates the cuttings in-place, converting waste material into a structural component that provides wellbore support.

Inventive Principle:

Principle #34Discarding and recovering

3Productivity

If conventional drilling equipment is used, then wellbore can be formed, but large equipment footprint is required

Engineering Contradiction:

Improvewellbore formation capabilityVSAvoidequipment footprint

Core Design Contradiction:

ProductivityVSArea of stationary object

Solution Approach 1:

The patent replaces large mechanical drilling equipment with a compact laser-based system. The laser head delivers optical energy through fiber-optic cables to perform drilling and casing formation, eliminating the need for large surface-mounted drilling rigs and associated mechanical equipment.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

Reduces the need for large casing materials and equipment footprint, enhancing drilling efficiency and reducing operational costs while achieving precise and reliable wellbore formation.

Implementation Method 1

The laser head emits a first laser beam in a downhole direction within the wellbore to form the wellbore through the subterranean zone

Methodology Applied

Scientific EffectLaser ablation: Laser Ablation

Implementation Method 2

The laser head emits a second laser beam in a radial direction within the wellbore. The second laser beam is incident on a portion of the drill cuttings. The second laser beam causes the portion of the drill cuttings to consolidate and form a casing of the wellbore

Methodology Applied

Scientific EffectLaser heating: Laser

Data Source

PatentEP4515072B1Wellbore drilling and completion systems using laser head

Publication Date: 2025.10.29 SAUDI ARABIAN OIL CO

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AI summary

Wellbore drilling and completion systems implement a method of completing a wellbore. A laser head is mounted to a wellbore drilling assembly positioned within a wellbore formed in a subterranean zone. The laser head emits a first laser beam in a downhole direction within the wellbore to form the wellbore through the subterranean zone. Doing so causes portions of the subterranean zone to be released as drill cuttings into the wellbore. The laser head emits a second laser beam in a radial direction within the wellbore. The second laser beam is incident on a portion of the drill cuttings. The second laser beam causes the portion of the drill cuttings to consolidate and form a casing of the wellbore.