SYSTEM TESTING BOREHOLE Russian patent published in 2001 - IPC

FIELD: oil and gas production, control over underground pools along shaft of borehole. SUBSTANCE: borehole in ground formation is formed with casing string anchored in hole shaft with the help of cement layer between casing string and shaft wall of borehole. In this case information on characteristic of ground formation can be transmitted through part of thickness of cement layer, as minimum. System includes at least one transmitter measuring characteristic. Each transmitter is attached to casing string and incorporates sensitive element entering cement layer and aid transmitting signals from transmitter to individual ground facility. Pressure transducer carrying pressure converter is employed as transmitter. Pressure converter has diaphragm, branch pipe linked to it and packing of silicon lubricant. Sensitive element of pressure transducer has probe including hose of wire screen closed on one end and connected to branch pipe with the other end. Gravel packing is put inside hose .Glass frit is located in branch pipe between packing of silicon lubricant and gravel packing of hose. EFFECT: provision for continuous reading of information from one or several zones of ground formation. 9 cl, 11 dwg