Rotary Continuous-Sampling Drill Bit With Core and Fluid Channels

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Solution Overview

Problem

Conventional core sampling requires complex wireline tooling and is time-consuming, and existing continuous sampling methods are limited to non-water-bearing formations and have high energy consumption.

Innovation Solution

A drill bit design with a core-receiving slot and peripheral slots, combined with face channels and a breaking surface, allows for continuous sampling by collecting core segments and drilling cuttings while drilling, using reverse circulation without the need for wireline tooling.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional wireline core sampling is used, then sample retrieval is achieved, but the process is time-consuming and requires complex tooling

Engineering Contradiction:

Improvesampling speedVSAvoidwireline tooling complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The invention extracts and eliminates the complex wireline tooling system from the sampling process. Instead of using wireline assemblies to retrieve core samples, the patent uses a simpler drill bit design with integrated core receiving slots that allow continuous sampling directly during drilling operations, thereby reducing device complexity while maintaining sampling capability

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The invention implements continuous sampling during the drilling process itself, rather than requiring separate retrieval operations. The core receiving slots are positioned to continuously capture core segments as they are formed during drilling, enabling uninterrupted sampling action throughout the drilling operation and significantly improving productivity

Inventive Principle:

Principle #20Continuity of useful action

2Productivity

If percussive pneumatic hammers are used for continuous sampling, then sampling continues without stopping, but energy consumption is high and limited to non-water-bearing formations

Engineering Contradiction:

Improvecontinuous sampling capabilityVSAvoidenergy consumption

Core Design Contradiction:

ProductivityVSUse of energy by moving object

Solution Approach 1:

The invention replaces the percussive pneumatic hammer system with a rotary drilling mechanism. Instead of using pneumatic impact to fracture and retrieve core samples, the patent uses a rotating drill bit with cutting edges that mechanically cut and form core segments continuously during rotation, thereby reducing energy consumption while maintaining continuous sampling capability

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The invention changes the operating parameters by using rotary motion instead of percussive impact. The drill bit rotates at controlled speeds to cut formation material and form core segments, which are then captured by the core receiving slots. This parameter change from impact-based to rotation-based mechanics enables continuous sampling in water-bearing formations while reducing energy consumption

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If percussive drill bits are used, then core sampling is achieved, but the method is limited to non-water-bearing formations

Engineering Contradiction:

Improveformation type compatibilityVSAvoidsampling reliability in water-bearing formations

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The invention replaces the air-based percussive mechanism with a water-compatible rotary drilling system. The rotary drill bit with integrated core receiving slots can operate in water-bearing formations without the limitations of pneumatic systems, as the rotary cutting action and fluid circulation system are compatible with both dry and water-bearing formations, thereby improving adaptability and reliability

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

Enables efficient and rapid collection of formation samples while drilling, allowing for real-time analysis and eliminating the need for separate sample retrieval, suitable for both water-bearing and non-water-bearing formations.

Implementation Method 1

pumping fluid through the annular space and collecting the core segments returning through the inner tube

Methodology Applied

Scientific EffectFluid flow:

Data Source

PatentUS12421804B2Continuous sampling drill bit

Publication Date: 2025.09.23 VERACIO LTD

AI summary

A drill bit having a central axis can comprise a shank defining an inner bore and a crown having a cutting face. The crown can define an outer operative circumference. The crown can comprise a core-receiving slot in communication with the inner bore of the shank. One or more peripheral slots can be in communication with the inner bore of the shank. The crown can comprise one or more face channels that are in communication with the core-receiving slot and a respective peripheral slot. A base portion can be positioned within the core-receiving slot. The base portion can define a breaking surface. The peripheral slots can be configured to receive fluid moving in a distal direction toward the cutting face of the crown. The face channels can be configured to deliver fluid from the respective peripheral slot to the core-receiving slot.