SYSTEM FOR AUTOMATIC MEASUREMENT OF GAS CONTENT AND VORTEX DEGASSING OF DRILLING FLUID Russian patent published in 2019 - IPC E21B47/10 E21B21/06 G01N7/14 

FIELD: measurement.

SUBSTANCE: invention relates to measurement technology and can be used in the oil and gas industry in drilling rigs. For this, the system contains two similar subsystems “At the input to the well” and “At the output from the well”, which include: reversible impeller pump with electric drive, two measuring vessels under different pressures, vortex degasser, jet pump, information collection and processing unit, power unit, remote gas analyzer. In this case, the system contains a measuring module operating under pressure and connected to the lower part with the pump outlet, and the upper part through a flow meter with the inlet of the vortex degasser. Inside the measuring vessel are two pressure sensors integrated in the assembly, a temperature sensor and electrical resistivity. Atmospheric pressure measuring vessel is connected to the pump, a regulating device is located in the lower part of the vessel to limit the flow of fluid, drilling fluid is supplied to the inner pipe, and through an external pipe connected to the atmosphere, the liquid is evacuated through a jet pump, to the nozzle through a tee, pipeline and regulating device, the drilling fluid under pressure is fed from the pump outlet. Lower part of the vortex degasser is also connected to the jet pump to evacuate the degassed drilling mud, and its upper part is connected to the remote gas analyzer through the flow meter of the gas-air mixture and the vacuum pump. Measuring vessels, flow meters, electric motor and flow meters and the temperatures at the inputs of the subsystems are connected by electrical connections with the block for the collection and preliminary processing of information, which performs the functions of automatic control of the operation of the subsystem through the power unit, as well as the transfer of functions to the device for manual control and display of information on the rig.

EFFECT: technical result of the invention is to improve the accuracy and reliability when measuring the density, volumetric gas content and the true density of the drilling fluid, as well as improving the efficiency of the vortex degassing of the drilling fluid due to the stabilization of thermodynamic conditions and magnetic treatment with continuous determination of the degree of degassing, that in the complex allows to increase the reliability of the automatic measurement system and bring the gas logging method to a quantitative, petrophysical reasonable level.

10 cl, 1 dwg