Abstract: A device and a method for early monitoring of gas intrusion based on pressure wave propagation are provided in the present disclosure. The technical solution is as follows. The lower end of the liquid storage tank is connected to the simulated wellbore through a liquid injection pipeline, a centrifugal pump, a pressure-stabilizing water tank, and a mass flowmeter. One end of the gas storage tank is connected to a screw air compressor, while the other end is connected to the simulated wellbore through an injection pipeline and a micro-orifice flowmeter. The gas-liquid mixer is provided at the upper end of the simulated wellbore, with the pressure-disturbing device connected below it. Multiple pressure sensors are provided at the middle of the simulated wellbore and connected to the computer via wires and an oscilloscope.

Abstract: An experimental device and method for co-existence of overflow and lost circulation in a fractured formation during drilling of a deviated well are provided. An inner cavity of an outer pipe is provided with an inner pipe to form a deviated casing. An upper side of the outer pipe is provided with a mixture outlet. A middle-lower side of the outer pipe is provided with a leakage port and two overflow ports. The gap width can be changed by adjusting a bolt and a support block to be compatible with different types of fracture models. A gas injection system includes an air compressor and a gas flowmeter. An upper port of a liquid injection system is connected to a joint arranged at upper ends of the inner pipe and outer pipe through a water pump, a liquid flowmeter and a liquid regulating valve.

Abstract: A device for simulating gas intrusion and bullheading in a wellbore under different inclinations is provided, which includes a wellbore outer pipe with an inner pipe and an LED light source therein. An outer wall of the wellbore outer pipe is provided with one or more inlets. A bubble generator is arranged outside a lower plug, and extends through the lower plug via an air inlet needle into the inner cavity of the wellbore outer pipe. An input end of the bubble generator is connected to an air compressor. A lower outlet of the wellbore outer pipe is connected to an inlet of a formation unit through a pipeline and a back pressure valve. A simulating method using such device is also provided.

Abstract: A device for simulating gas intrusion and bullheading in a wellbore under different inclinations is provided, which includes a wellbore outer pipe with an inner pipe and an LED light source therein. An outer wall of the wellbore outer pipe is provided with one or more inlets. A bubble generator is arranged outside a lower plug, and extends through the lower plug via an air inlet needle into the inner cavity of the wellbore outer pipe. An input end of the bubble generator is connected to an air compressor. A lower outlet of the wellbore outer pipe is connected to an inlet of a formation unit through a pipeline and a back pressure valve. A simulating method using such device is also provided.

Abstract: A device and a method for early monitoring of gas intrusion based on pressure wave propagation are provided in the present disclosure. The technical solution is as follows. The lower end of the liquid storage tank is connected to the simulated wellbore through a liquid injection pipeline, a centrifugal pump, a pressure-stabilizing water tank, and a mass flowmeter. One end of the gas storage tank is connected to a screw air compressor, while the other end is connected to the simulated wellbore through an injection pipeline and a micro-orifice flowmeter. The gas-liquid mixer is provided at the upper end of the simulated wellbore, with the pressure-disturbing device connected below it. Multiple pressure sensors are provided at the middle of the simulated wellbore and connected to the computer via wires and an oscilloscope.

Abstract: An experimental device and method for co-existence of overflow and lost circulation in a fractured formation during drilling of a deviated well are provided. An inner cavity of an outer pipe is provided with an inner pipe to form a deviated casing. An upper side of the outer pipe is provided with a mixture outlet. A middle-lower side of the outer pipe is provided with a leakage port and two overflow ports. The gap width can be changed by adjusting a bolt and a support block to be compatible with different types of fracture models. A gas injection system includes an air compressor and a gas flowmeter. An upper port of a liquid injection system is connected to a joint arranged at upper ends of the inner pipe and outer pipe through a water pump, a liquid flowmeter and a liquid regulating valve.

Abstract: A drilling well underground kick processing method and device are described.

Abstract: A drilling well underground kick processing method and device are described.

Abstract: The present invention provides a method and equipment for optimizing hydraulic parameters of deepwater managed pressure drilling in real time. The method comprises: acquiring overflow parameters in the current drilling process, performing preprocessing and feature extraction on the overflow parameters, and inputting the overflow parameters into trained support vector machine identification models for overflow judgment. If overflow occurs at the current drilling depth, reducing an opening of a throttle valve and increasing a displacement of a submarine pump, measuring a wellhead back pressure and calculating a bottom hole pressure, and judging whether overflow continues is performed.