A removable cartridge for use with a liquid diffusion device is provided. The removable cartridge includes a cartridge housing defining an internal housing cavity, partially filled with a liquid to be diffused, and a diffusion head positioned within the internal housing cavity with a venturi device for generating diffused liquid from the liquid contained in the internal housing cavity. The diffusion head defines at least a portion of a gas supply conduit that extends from a bottom end of the removable cartridge to the venturi device through the liquid to be diffused to enable the venturi device to be supplied with pressurized gas from an external source via the bottom end of the removable cartridge.

The present disclosure relates to a device and method for continuous mixing of a solid drag reducer. The device for continuous mixing of a solid drag reducer comprises a raw material storage device (1), a pneumatic raw material delivery device (2), a power device (3), a flow testing device (4) and a dissolving device (5). The method for continuous mixing of a solid drag reducer uses the device for continuous mixing of a solid drag reducer, which can realize continuous mixing of the solid drag reducer during large-scale volume fracturing.

A microfluidic device including a microfluidic circuit having a microfluidic inlet duct and a microfluidic outlet duct, and a microfluidic capsule, a hydraulic activation circuit having a hydraulic inlet duct and a hydraulic outlet duct, the microfluidic capsule having a chamber separated into two subspaces by a deformable membrane, the chamber having a first subspace into which open the microfluidic inlet duct and the microfluidic outlet duct, and a second subspace into which open the hydraulic inlet duct and the hydraulic outlet duct, a flow rate-control system connected to the hydraulic inlet duct, the flow rate-control system being regulated in order to inject or suck an activation liquid into the second subspace in order to displace the membrane inside the chamber.