METHOD AND DEVICE FOR DATA COLLECTION ON WELL CHARACTERISTICS IN PROCESS OF DRILLING Russian patent published in 2008 - IPC E21B47/06 E21B49/08 

FIELD: mining.

SUBSTANCE: invention relates to determination of various well characteristics in the underground formation, through which the borehole passes. For this purpose a pressure drop is created due to the difference between the internal pressure of fluid that passes through the drilling tools and pressure in the circular space in the borehole. The device contains an extension arm that can be connected with the drilling tools and has an opening that enters into the chamber in the extension arm. A piston is located in the chamber with a rod passing through the opening. The piston can move from the closed position when the rod blocks the opening to the open position when the rod is retracted into the chamber to form a cavity for intake of well fluid. A sensor is located inside the rod, which is intended for data collection from the well fluid contained in the cavity.

EFFECT: increase of accuracy of determination of well characteristics.

34 dwg, 9 dwg