2results about How to "Little pollution" patented technology

The invention discloses a weed extruding and rubbing and liquid medicine coating device, and belongs to agricultural machinery. The upper end of a hollow shaft stepping motor is connected with a liquid conveying pipe through a clamping seat, the lower end of a motor shaft is fixedly provided with a hanging shaft through a coupler, a fixing sleeve is rotatably sleeved at the lower end of the hanging shaft, the lower end of the fixing sleeve is sequentially provided with an atomizing nozzle, a seepage cylinder and a cylinder type sun gear from the center to the outside, and the cylinder wall of the tooth root of the sun gear is provided with an axial long-strip-shaped through hole. The sponge axial boss is inserted into the through hole and the outer end is exposed; a rotatable cylindrical planetary gear is mounted on a gear shaft at the lower end of the crank arm and is constantly meshed with the sun gear, and a sponge boss is intermittently extruded by tooth crests; the device realizes physical and mechanical damage to stems and leaves of weeds, and at the same time, the herbicide liquid is applied to the damaged part, so that absorption of the weeds to the liquid is promoted, and the device has the outstanding characteristics of good herbicide effect, low consumption of the liquid, low loss of the liquid, low operation cost and light environmental pollution.

This application relates to the field of oil and gas field development technology, specifically to a method for extracting and three-dimensionally locating weak seismic signals from deep shale oil reservoirs. The method includes: during fracturing operations in deep shale oil reservoirs within the target exploration area, acquiring weak seismic signals induced by fracturing fractures through each geophone channel; calculating the characteristic difference degree representing the deviation of waveform morphology between signals, using this as a metric to classify the weak seismic signals from all geophone channels, thereby selecting a target signal set; determining the disturbance assessment value of each weak seismic signal within the target signal set, selecting a benchmark signal, extracting the time window from the benchmark signal to the complete attenuation characteristic of the overlying formation fracture, and based on this, extracting effective signals from the weak seismic signals within the target signal set for three-dimensional location of the fracturing fractures. This application improves the accuracy of three-dimensional location of fracturing fractures in deep shale oil reservoirs.