Integrated Logging Instrument for Simultaneous Coring and Sampling
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Solution Overview
Problem
Current petroleum exploration and development methods require separate equipment for obtaining formation fluid samples and rock samples, leading to inefficient operations with prolonged wellhead occupation and high costs due to the need for multiple operations.
Innovation Solution
An integrated logging instrument with a downhole main body and ground system, featuring a coring and sampling mechanism, power mechanism, and energy storage mechanism, which allows for simultaneous acquisition of both formation fluid and rock samples, reducing operation time and improving efficiency by integrating the processes and utilizing a motor-driven piston structure for suction and hydraulic power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate equipment is used for obtaining formation fluid samples and rock samples, then each sampling operation can be performed with dedicated equipment, but the wellhead occupation time increases and operation efficiency decreases
Solution Approach 1:
The patent combines formation fluid sampling and rock core sampling functions into a single integrated logging instrument. The instrument includes a sampling mechanism for fluid extraction and a coring mechanism for rock core acquisition, both operating within one downhole tool assembly. This merging allows simultaneous or sequential execution of both sampling operations during a single wellhead occupation, directly resolving the time loss issue while maintaining reliable sampling capabilities through dedicated mechanisms for each function.
Solution Approach 2:
The integrated logging instrument is designed as a multi-functional device that can perform multiple sampling operations (fluid sampling and rock core sampling) using a single equipment deployment. The universal design enables the instrument to adapt to different sampling requirements through its modular mechanism structure, allowing it to switch between or combine different sampling functions without requiring separate specialized equipment for each operation type.
2Reliability
If separate equipment is used for formation fluid sampling and rock sampling, then each function can be optimized independently, but the operation cost increases due to multiple operations
Solution Approach 1:
By merging fluid sampling and rock sampling functions into one integrated instrument, the patent reduces the number of separate operations required during well operations. The combined instrument eliminates the need for multiple equipment deployments and associated operational costs, while maintaining reliable sampling functions through dedicated mechanisms for each sampling type within the unified device structure.
3Productivity
If an integrated instrument is used for simultaneous coring and sampling, then operation time and costs are reduced, but the device complexity increases
Solution Approach 1:
The integrated logging instrument employs segmentation by dividing the device into distinct functional modules: a sampling mechanism for fluid extraction, a coring mechanism for rock core acquisition, and a power mechanism with motor and hydraulic system. Each module operates independently but is coordinated through a unified control structure, allowing the complex functions to be managed through modular design that simplifies integration while maintaining high productivity.
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 integrated instrument significantly reduces operation time and costs by completing both sample acquisitions in a single well run, enhancing operational efficiency and precision while ensuring safety through temporary power storage.
Implementation Method 1
The piston structure is configured to provide suction power for the pushing and setting assembly to extract formation fluid
Implementation Method 2
The pump body is configured to provide hydraulic power for radial extension and retraction of a coring bit, a probe and a pushing arm of the coring and sampling mechanism
Implementation Method 3
The energy storage mechanism is configured to store pressure energy of the power mechanism, is able to serve as a temporary power source
Data Source
AI summary
An integrated logging instrument for coring and sampling includes a downhole main body and a ground system. The downhole main body is connected with the ground system through a long cable. The downhole main body includes a coring and sampling mechanism, a power mechanism and an energy storage mechanism. The coring and sampling mechanism includes a coring assembly for drilling cores and a pushing and setting assembly for downhole fixation. The power mechanism is arranged at an upper end of the coring and sampling mechanism, and includes a motor, a piston structure and a pump body. The piston structure and the pump body are respectively arranged at two output ends of the motor. The piston structure is arranged to provide suction power. The pump body is arranged to provide hydraulic power. The energy storage mechanism is arranged at a lower end of the coring and sampling mechanism.