| Abstrakt: |
The blockage of natural gas hydrate (referred to as "hydrate") has always been a frequent problem in the actual production. In the early deposition stage of blockage, The scour action of the internal fluid is used to control it without stopping work. The mechanical property of hydrate is an important theoretical support for the implementation of this method. In order to study the mechanical property of hydrate, a hydrate failure experiment was carried out with a hydrate generation device and a mechanical testing device. The vertical load variation during the experiment was recorded and the vertical pressure data were calculated. Taking the reaction time, whether silt was added and silt particle size were used as experimental variables, the influences of these three experimental variables on the mechanical property of hydrate were studied. The results show that under the experimental working conditions (pressure is 4 MPa, constant temperature water bath set to 0.5 °C for 1 h, then set to -2.0 °C for 9 h), the measured vertical pressure required to destroy hydrate is 0.48 MPa. As the reaction time increases, the vertical pressure required to destroy the hydrate increases. Compared with hydrates without silt, greater vertical pressure (0.86 MPa to 2.21 MPa) is required to destroy hydrates containing silt. The larger the silt particle size, the tighter the silt binds to the hydrate, and the greater the vertical pressure required to destroy the hydrate. [ABSTRACT FROM AUTHOR] |
