Device for characterizing and testing on-site basic parameter of natural gas hydrate

Patent metadata

Field	Value
Publication number	US-12553339-B2
Application number	US-202519017813-A
Country	US
Kind code	B2
Filing date	Jan 13, 2025
Priority date	Jun 28, 2024
Publication date	Feb 17, 2026
Grant date	Feb 17, 2026

Abstract

A device for characterizing and testing on-site basic parameter of a natural gas hydrate includes a servo transmission mechanism, a pressure-resistant manipulator, a sealing mechanism, a data acquisition system, a resistivity testing system, an outlet metering system and an undisturbed permeability testing module; the undisturbed permeability testing module is used for testing a permeability of a hydrate sample subjected to sample transfer; the pressurizing system is used for adjusting a pressure of each point in the device; the servo transmission mechanism includes a pressure-resistant sample transfer manipulator and a servo driver; the servo driver is used for driving the pressure-resistant sample transfer manipulator to reciprocating motion, and the pressure-resistant sample transfer manipulator is used for separating the sample to be tested from the sheath under a pressure and pushing the sample into a holder; and the resistivity testing system is used for detecting a resistivity value.

First claim

What is claimed is:

1 . A device for characterizing and testing an on-site basic parameter of a natural gas hydrate, comprising: a servo transmission mechanism, a pressure-resistant manipulator, a sealing mechanism, a data acquisition system, a resistivity testing system, an outlet metering system, and an undisturbed permeability testing module, wherein the sealing mechanism comprises at least a plurality of valve bodies;
the servo transmission mechanism is sequentially connected to the pressure-resistant manipulator, the resistivity testing system and the outlet metering system, and the resistivity testing system is a multi-channel resistivity testing system, and respectively connected to a pressurizing system and the undisturbed permeability testing module; and when the device is working, reciprocating motion or rotation of a marine gas hydrate sample in the pressure-resistant manipulator is achieved by the servo transmission mechanism, data changes of pressure, temperature and resistivity of the device are monitored in real time by a pressure acquisition system, a temperature acquisition system and the resistivity testing system, and a permeability of the marine gas hydrate sample is detected in real time by the undisturbed permeability testing module, so as to obtain on-site parameter data of the marine gas hydrate sample.

2 . The device according to claim 1 , wherein the servo transmission mechanism comprises a servo motor, a servo driver, a servo rotating mechanism, and a sample extractor, wherein the servo motor, the servo driver, the servo rotating mechanism, and the sample extractor are sequentially connected; the sample extractor is used for gripping the marine gas hydrate sample; and the servo motor is used for driving the servo driver to drive the sample extractor to perform reciprocating motion in the pressure-resistant manipulator, and driving the servo rotating mechanism to drive the sample extractor to rotate in the pressure-resistant manipulator.

3 . The device according to claim 1 , wherein the pressure-resistant manipulator is configured for withstanding pressures from 0 to 40 MPa; and
the pressure-resistant manipulator is sleeve-shaped, a sheath is arranged outside the marine gas hydrate sample, and the servo transmission mechanism drives the marine gas hydrate sample and the sheath to perform reciprocating motion and rotate in the pressure-resistant manipulator.

4 . The device according to claim 1 , wherein the sealing mechanism comprises at least two valve bodies;
the at least two valve bodies comprise a ball valve and a back-pressure control valve; the ball valve is arranged between the pressure-resistant manipulator and the resistivity testing system, and the back-pressure control valve is arranged between the resistivity testing system and the outlet metering system; and a pressure between the resistivity testing system and the undisturbed permeability testing module is ensured by the ball valve and the back-pressure control valve.

5 . The device according to claim 4 , wherein the undisturbed permeability testing module comprises a testing mechanism and an undisturbed permeability testing injection pump connected to the testing mechanism.

6 . The device according to claim 1 , wherein the resistivity testing system is connected to the pressurizing system, and the pressure in the device is maintained and stabilized by the pressurizing system.

7 . The device according to claim 1 , wherein the pressure-resistant manipulator is detachably connected to the resistivity testing system through a clamp, and the plurality of valve bodies are arranged between the clamp and the resistivity testing system.

8 . The device according to claim 1 , wherein the data acquisition system comprises the pressure acquisition system and the temperature acquisition system, the pressure acquisition system comprises a plurality of pressure sensors and a pressure acquisition module, and the temperature acquisition system comprises a plurality of temperature sensors and a temperature acquisition module; and
the plurality of pressure sensors and the plurality of temperature sensors acquire real-time pressure values and temperature values of a plurality of positions in the device.

9 . The device according to claim 8 , wherein the data acquisition system further comprises a computer, and data processing and analyzing software installed in the computer.

10 . The device according to claim 1 , wherein the outlet metering system is a high-precision electronic balance.

Assignees

• Guangzhou Inst Energy Conversion Cas

Inventors

• Li Xiaosen
• Wang Yi
• Liu Jianwu
• Xu Rui
• Chen Zhaoyang
• Li Gang
• Zhang Yu

Classifications

• G01N15/0826

  and measuring fluid flow rate, i.e. permeation rate or pressure change · CPC title

• G01N15/0806

  Details, e.g. sample holders, mounting samples for testing · CPC title

• E21B49/088 Primary

  combined with sampling · CPC title

• E21B49/001

  specially adapted for underwater installations · CPC title

• E21B25/005

  Above ground means for handling the core, e.g. for extracting the core from the core barrel · CPC title