Abstract: Disclosed are a temporary plugging agent and a preparation method thereof, and a method for temporary plugging and fracturing of a high-temperature reservoir. The temporary plugging agent includes the following components in mass fractions: acrylamide 5%, composite crosslinking agent 1%, laponite 1%, ammonium persulfate 0.1% and water 92.9%.

Abstract: A volute device, including: an intake passage including an inner passage and an outer passage; a gas inlet including a first gas inlet and a second gas inlet; and a gas outlet. The gas inlet is disposed at one end of the intake passage, and the gas outlet is disposed at the other end of the intake passage. A first inner passage and a first outer passage communicate with the first gas inlet to suck gas in a semicircle of a circumference direction at between 0° and 180°. A second inner passage and a second outer passage communicate with the second gas inlet to suck gas in another semicircle of the circumference direction at between 180° and 360°.

Abstract: In a method for implementing device grouping and interactions between grouped devices a device creating a device group sends an advertisement message carrying identification information of a device group to which it belongs, to the network. After receiving the advertisement message, a network device joins the device group by the corresponding advertisement message. When two grouped network devices interact with each other, the method further comprises: sending an access request to an accessed device; judging by the accessed device whether the device sending the request is a trusted device and if so, interacting by both parties with each other; otherwise, denying the access request, or determining by the initiating device and the accessed device, a common trusted third party; acquiring by the initiating device, key information of the accessed device from the common trusted third party, and interacting with the accessed device by using the acquired key information.

Abstract: The present invention discloses a method for implementing device grouping and interactions between grouped devices. In a network, a device creating a device group sends an advertisement message carrying identification information of a device group to which it belongs, to the network. After receiving the advertisement message, a network device which wants to join in the corresponding device group joins in the device group identified by the corresponding advertisement message.