DEVICE AND METHOD OF WELL HYDRODYNAMIC INVESTIGATIONS AND TESTS Russian patent published in 2003 - IPC

FIELD: oil producing industry. SUBSTANCE: method includes determination of quantitative values of formation parameters and taking of sealed samples of fluid with provision of control over entire test cycle by recorded pressure diagrams which serve as a base for calculation of producing formation hydrodynamic parameters. Run into well for the purpose on logging cable is device with remote control of processes of packer setting, fluid inflow restoration of pressure in underpacker or interpacker zone and subsequent automatic removal of packers. To attain said technical result, use is made of device which consists of packering unit with rubber members, depression chamber for induction of fluid inflow from formation and consisting of set of tubing pipes with valve system, atmospheric pressure, sealed sampler and remote pressure pickups for control over entire process of hydrodynamic tests - opening of receiving valve, fluid inflow and restoration of pressure in underpacker or in interpacker zone with recording of pressure diagrams for calculation of all hydrodynamic parameters of producing formation. In so doing, used for device running into well is a logging cable and for packer setting, control of valve system of depression chamber and automatic removal of packers, use is made of one of electrohydromechanical drive ensuring opening of depression chamber after packering of tester only. Rubber members of packering unit are cylindrical and spaced from one another at a distance from 2-3 cm to several meters. The distance between packers amounting up to several meters is used for hydrodynamic testing with single-packer assembly, with two packering members or selective tests with two-packer assembly. In this case, made on external surface of rubber members are concentric bores for production of hydroseal of high-pressure zones on contact of packer with pipe string. Said zones are formed in mechanical compression of rubber members to provide for airtightness of packering. Depression chamber is made with total volume of up to 300 l. EFFECT: higher efficiency of operating wells due to provision of multifunctional complex for well hydrodynamic investigation and testing on logging cable. 2 cl, 6 dwg