Chinese Academy of Sciences

Xiaoxiao Li

Bo Zhang

Hao Liu

Qiang Xue

Houzhen Wei

Qingshan Meng

Xiaoli Zhao

Rui Xu

Xiaoniu Yang

Yumeng Tian

The invention provides a self drilling side pressure simulation test device and method for a formation containing natural gas hydrate, belonging to the technical field of geotechnical mechanics. The device comprises a reactor, a cutting tool, a mud conveying mechanism and a side pressure testing device. The reactor is used to fill the simulated substance of the formation containing natural gas hydrate to be tested. The cutting tool is arranged in the reactor, and the cutting tool can move up and down relative to the reactor. One end of the mud conveying mechanism is connected with the reactor, for outputting the mud cut by the cutting tool from the reactor; The side pressure test device can complete the side pressure test experiment with the cutting tool moving to the set depth. The method is implemented based on the device. The in-situ test method can directly test the engineering mechanical parameters of the formation containing natural gas hydrate. At the same time, it is of great significance to the formation stability of natural gas hydrate development and the prevention and control of engineering disasters.

Self drilling pressure simulation test device and method for formation containing natural gas hydrate

Carbon dioxide-reversibly-protected chain extension-crosslinking agents and a preparation method and use thereof are disclosed, The carbon dioxide-reversibly-protected chain extension-crosslinking agents have chemical structures represented by Formula I, Formula II, Formula III or Formula IV, wherein, n, m and p are integers, R is either OCHCH(CH) or OCHCH, 1&#x2264;n&#x2264;20, 1&#x2264;m&#x2264;10, and 1&#x2264;p&#x2264;10. 

Carbon dioxide-reversibly-protected chain extension-crosslinking agent and preparation method and use thereof

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Changchun, China

Xiaoxiao Li