DEVICE FOR CONTINUOUS MEASUREMENT OF FORMATION PRESSURE AND PRESSURE IN ANNULAR SPACE Russian patent published in 2024 - IPC E21B47/06 

FIELD: oil industry; measurement.

SUBSTANCE: device for continuous measurement of formation pressure and pressure in annular space contains a downhole survey complex (DSC) lowered on a geophysical cable and a sub lowered on a tubing string and made with possibility of being connected to the DSC. DSC contains independent lower and upper measuring sensors, one of which is interconnected with inner space of tubing, and the other one with annular space outside tubing. Sub is located in the well between formations and is equipped with a longitudinal cylindrical cavity outside the tubing with a lead-in funnel from above and a channel communicating with the inner space of the tubing, below which there is a valve with rings on a spring support. DSC is equipped with nipple from below, made with the possibility of tight interaction with the cylindrical cavity of the sub so that the lower sensor through the channel communicates with the inner cavity of the tubing after the valve opening, and the upper one is above the lead-in funnel with an annular space.

EFFECT: higher accuracy of determination of current formation pressure and pressure in tubular annulus of production well.

2 cl, 2 dwg