3results about How to "Solve mining problems" patented technology

In-situ thermal recovery of unconventional oil and gas methods involve directly heating the water layer of unconventional oil and gas reservoirs through horizontal wells, or drilling / fractured the high-permeability layer of unconventional oil and gas reservoirs before injecting water or periodically injecting water and then heating the injected water, or a combination of the above two methods. By controlling the temperature and pressure conditions of the reservoir, these methods can improve the hydrocarbon generation and expulsion capacity of source rocks, promote in-situ thermal cracking of hydrocarbons, increase the temperature and viscosity of crude oil, and increase the content of free oil and gas in the reservoir. Furthermore, they can utilize various oil displacement forces for oil and gas extraction.

This invention provides a method and system for dynamic optimization of UAV flight trajectories based on neural networks, belonging to the field of data processing technology. The method includes: calculating the geometric moments of a two-dimensional contour; obtaining the central moment of the contour based on the geometric moments; normalizing the central moment and extracting Hu invariant moment features; combining shape fit features and Hu invariant moment features to form a digital environment feature vector; processing the digital environment feature vector with pose state information and a preset desired trajectory; fusing the results through a neural network model to obtain control parameter adjustment instructions; and, based on the control parameter adjustment instructions, real-time correcting of the UAV flight controller parameters to generate control signals driving the UAV actuators, thereby achieving dynamic tracking of the desired trajectory. This invention enables accurate dynamic tracking of complex trajectories by UAVs.

The present application relates to coal bed gas drilling process technical field, disclose variable diameter reamer drill pipe drilling horizontal well drilling technology of go through mined-out area, the present application through setting go through mined-out area drilling tool, including follow pipe upper part, follow pipe upper part and setting in follow pipe upper part's loose hand part and located follow pipe lower part end head's variable diameter reamer drill bit and conventional drill bit, and using four open well completion mode using the drilling tool go through mined-out area's follow pipe drilling method, by using follow pipe using the no coupling design, reduce the friction when follow pipe drilling, in addition design professional hand structure realizes torque transmission and loose hand, avoid large diameter rock debris appears.Every complete certain footage after full circulation, eye guarantee the stability of wellbore, the present application very goodly solves go through mined-out area and carry out exploitation to lower coal seam problem, same technology can also be used for salt well development, can also go through upper mined-out salt layer, carry out exploitation to lower salt layer.