Formation Sampling While Drilling System

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Solution Overview

Problem

Current logging while drilling technologies cannot perform formation sampling, leading to imprecise judgments of formation conditions and inability to effectively avoid false assessments due to reliance on experience and empirical data, which does not meet production needs.

Innovation Solution

A system comprising a suction pup joint for cleaning formation fluid, a sampling pup joint for storing the fluid, a setting pup joint to establish a fluid channel, and an electrohydraulic high voltage connection device, along with control circuits and pressure sensors, to control and optimize the sampling process, enhancing precision and universality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If logging while drilling technology is used to measure formation parameters, then real-time formation evaluation capability is improved, but formation sampling capability deteriorates (cannot obtain actual formation fluid samples)

Engineering Contradiction:

Improveformation parameter measurement accuracyVSAvoidformation sampling capability

Core Design Contradiction:

Measurement precisionVSAdaptability or versatility

Solution Approach 1:

The logging while drilling instrument is enhanced with multiple functional modules including suction module, sampling module, and analysis module, allowing a single device to perform both parameter measurement and formation fluid sampling functions that were previously separate operations

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Ease of operation

If experience and empirical data are used for formation evaluation, then operational simplicity is maintained, but judgment precision deteriorates (false judgments cannot be avoided)

Engineering Contradiction:

Improveoperational simplicityVSAvoidformation condition judgment accuracy

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

The system replaces subjective experience-based judgment with automated electronic analysis using detectors and processors that objectively analyze formation fluid samples, substituting human empirical assessment with instrumental measurement and data processing

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Device complexity

If conventional logging instruments are used, then device complexity is minimized, but functional capability deteriorates (cannot perform formation sampling)

Engineering Contradiction:

Improveinstrument structure simplicityVSAvoidformation sampling function

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The logging instrument is divided into distinct functional modules (suction module with pump, sampling module with storage container, analysis module with detectors), allowing each component to perform its specific function while maintaining overall system manageability through modular architecture

Inventive Principle:

Principle #1Segmentation

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 system enables precise formation sampling and storage during drilling, optimizing current logging instruments by improving universality and precision, facilitating efficient on-site assembly and operation.

Implementation Method 1

the suction pup joint being provided with a first electric motor, a first piston cylinder and a first electromagnetic valve in the interior thereof which are connected

Methodology Applied

Scientific EffectPiston cylinder mechanism:

Implementation Method 2

the sampling pup joint being provided with a second electric motor, a second piston cylinder, a second electromagnetic valve and a sample storage room in the interior thereof which are connected

Methodology Applied

Scientific EffectPiston cylinder mechanism:

Implementation Method 3

an electrohydraulic high voltage connection device provided between the setting pup joint and the sampling pup joint

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Implementation Method 4

the pressure sensor being provided on the fluid channel and provided to detect the fluid pressure in the fluid channel

Methodology Applied

Scientific EffectPressure detection:

Data Source

PatentUS10180064B2System for sampling from formation while drilling

Publication Date: 2019.01.15 CHINA NAT OFFSHORE OIL CORP

AI summary

A system of formation sampling while drilling, comprising: a suction pup joint provided to pump out and clean the formation fluid; a sampling pup joint provided to sample and store the formation fluid; a setting pup joint provided between the suction pup joint and the sampling pup joint and provided to establish a fluid channel between the formation fluid and the suction pup joint, the sampling pup joint; and an electrohydraulic high voltage connection device provided between the setting pup joint and the sampling pup joint. The embodiments of the present invention can be applied in the field of formation exploration technology, the function of storing the formation sample in the process of logging while drilling can be accomplished and the current logging instrument can be effectively optimized, the universality and precision of the current logging function can be effectively improved according to the embodiments of the present invention.