High-Pressure Core Sample Storage Module Design
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Solution Overview
Problem
Current core sampling methods face challenges in efficiently collecting and preserving subterranean formation fluids, particularly in maintaining the integrity and conditions of core samples during retrieval and transportation, which affects the accuracy of subsequent testing and evaluation.
Innovation Solution
The development of a high-pressure core module with a core drilling tool and sampling system that includes a stabilizing pad, coring bit, and a modular design for storing and preserving core samples, along with sensors for monitoring temperature, pressure, and acceleration, and a mechanism for maintaining in-situ conditions during transport to the surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If core samples are retrieved using conventional methods, then the retrieval process is simple and quick, but the sample integrity and original formation conditions are compromised during transport
Solution Approach 1:
The core sample is nested within a core sample holder that maintains in-situ pressure, which is then nested within a storage chamber. The holder acts as a protective container that preserves the core sample's original conditions while being transportable within the larger storage system.
Solution Approach 2:
A fluid-filled chamber acts as an intermediary medium between the core sample and the external environment. This fluid medium transmits and maintains the in-situ pressure conditions while isolating the core sample from damaging external forces during retrieval and transport.
2Reliability
If core samples are stored without pressure maintenance, then the storage and transport process is simpler, but the original formation conditions are lost affecting analysis accuracy
Solution Approach 1:
The core sample holder is pre-loaded with fluid at in-situ pressure conditions before the core sample is inserted. This self-contained system automatically maintains the pressure environment without requiring active pressure control mechanisms during transport, preserving formation conditions passively.
Solution Approach 2:
The storage chamber is prepared in advance with the appropriate fluid medium and pressure conditions before the core sampling operation. This preliminary preparation ensures that when the core sample is retrieved, the pressure-maintaining environment is already in place, eliminating the need for complex real-time pressure control.
3Measurement precision
If sensors are added to monitor temperature, pressure, and acceleration, then sample condition monitoring is improved, but device complexity and cost increase
Solution Approach 1:
The storage chamber is designed to serve multiple functions: it maintains in-situ pressure, provides a protective environment for the core sample, and acts as a mounting platform for sensors. This multi-functional design integrates monitoring capabilities without requiring separate dedicated sensor housings or complex mounting structures.
Data Source
AI summary
A sampling tool to sample core samples from a wellbore is disclosed. A core sampling storage module includes a pressure housing to store a plurality of core samples, a core tube within the pressure housing, the core tube to store a plurality of core samples drilled from a downhole formation, a pressure housing cover that is configured to be selectively rotated to an open position or a closed position, an activation mechanism to receive a command, and based on the command, open or close the pressure housing cover, a push rod to selectively install a plug to cover the core tube, wherein when the plug is installed the pressure housing maintains a pressure.