Abstract: A heat pipe and a geothermal energy collecting device. The heat pipe includes a sealing member which is provided with channels; a first pipe body, one end of the first pipe body has an opening, and an other end of the first pipe body is sealed by the sealing member, which has a first chamber, first heat transfer members which are connected to the sealing member and located at one side of the sealing member, each of the first heat transfer members has a first cavity; and second heat transfer members which are connected to the sealing member and located at an other side of the sealing member, each of second heat transfer members has a second cavity configured to communicate with the first cavity of a corresponding one of the first heat transfer members via a respective one of the channels.

Abstract: An integrated plugging and perforating operation system is provided, including an operation truck, a wellhead equipment pry, and a centralized control room. A mechanical mechanism and a power mechanism are arranged on a chassis of the operation truck. The mechanical mechanism includes a turntable assembly, where a telescopic arm assembly is installed on the turntable assembly, a mechanical arm assembly for logging operation is installed at an operating end of the telescopic arm assembly, and a logging winch assembly and a follow-up winch assembly are arranged at a counterweight end of the telescopic arm assembly to form a counter weight of the telescopic arm assembly. The power mechanism is configured for providing power output to the mechanical mechanism.

Abstract: An intelligent emergency power supply system including a power line, a signal communication module, an emergency power module and at least one luminaire, the luminaire is powered by the emergency power module in a state when the live line and the null line are not regularly powered, and the luminaire is capable of extracting the digital signals loaded on the live line and/or the null line and adjusting its own working mode according to control commands corresponding to the digital signals.

Abstract: An intelligent emergency power supply system including a power line, a signal communication module, an emergency power module and at least one luminaire, the luminaire is powered by the emergency power module in a state when the live line and the null line are not regularly powered, and the luminaire is capable of extracting the digital signals loaded on the live line and/or the null line and adjusting its own working mode according to control commands corresponding to the digital signals

Abstract: The present application discloses a final joint of an immersed tunnel, a prefabrication method and an installation method, wherein the final joint includes two end surfaces connected with installed adjacent tube sections; the two end surfaces are both tilted surfaces, so that the longitudinal profile of the final joint along an installation direction is of an inverted trapezoid structure; and the final joint further may be of a structure with a tube section I and a tube section II which are connected with each other.

Abstract: The present application discloses a final joint of an immersed tunnel, a prefabrication method and an installation method, wherein the final joint includes two end surfaces connected with installed adjacent tube sections; the two end surfaces are both tilted surfaces, so that the longitudinal profile of the final joint along an installation direction is of an inverted trapezoid structure; and the final joint further may be of a structure with a tube section I and a tube section II which are connected with each other.