A new technique for high-fidelity cutting technology for hydrate samples

Abstract

Designing a high-fidelity cutting device is one of the difficulties in hydrate samples pressure-holding transfer. Due to the limitations of the existing mechanical system, there is much damage to the cut surface of hydrate samples, with many chips produced, which seriously affects the quality of samples. In this paper, a new cutting device utilizes two servo motors to achieve a high degree of automation. Using the Archimedes spiral, it achieves low disturbance of the cut surface and provides accurate control of the process. In addition, due to the operation of the sample long-stroke push unit, cutting hydrate samples of any length with almost no chips within a short cutting time can be achieved. Laboratory and sea tests have achieved all design requirements of the equipment and strongly demonstrate its benefit and stability. It is concluded that this new high-fidelity cutting technology is practically efficient. The physical state of the hydrate can be maintained to the greatest extent, and thus the new equipment provides significant support for the exploration and development of hydrate resources.

概要

目的

目前在水合物岩心样品保压转移领域, 设计一种高保真切割装置是难点之一。由于现有机械结构的局限性, 切削表面存在很大的扰动, 且水合物样品产生的碎屑较多, 严重影响了样品的质量。本文旨在设计一款具备保压功能并且实现低扰动切割的样品管切割装置。

创新点

1. 以阿基米德螺旋线为等距螺旋线的基本性质为基础, 在工程上进行结构设计;2. 搭建上位机控制伺服电机, 实现切割过程的精准可靠;3. 当特殊情况发生时, 可以在不拆卸的情况下实现原位复原。

方法

1. 提出一种全新的切割方法, 并利用两个伺服电机来实现高度自动化;2. 采用阿基米德螺线, 实现切割面的低扰动切割和切割过程的精确控制;3. 对切刀进行结构优化设计, 降低碎屑数量。

结论

1. 基于样品长行程推动装置的配合, 切割可以在短时间内获得任意长度的水合物样品, 并且几乎没有切屑;2. 实验室和海试达到了设备的各项设计指标, 有力地证明了设备的先进性和稳定性;3. 这种全新的高保真切割技术非常可靠, 使原位状态水合物得到最大程度的保持, 为水合物资源的勘探开发提供了设备支持。