RU2003114110A - METHOD FOR WORKING A WELL JET PLUG IN TESTING AN OPEN BORE WELL AND A WELL JET PLUG FOR ITS IMPLEMENTATION - Google Patents

Claims (3)

1. The method of operation of a downhole jet installation, namely, that a jet pump with a stepped through passage in its housing, a packer with a through passage located below the jet pump and located at the lower end of the pipe string, is autonomous complex, while during the descent in the open hole through an autonomous logging complex, the background values of the physical parameters of the near-wellbore zone of the productive formations are recorded and when of a given depth, the packer is unpacked, the latter being installed above the studied productive formations, then lowered along the pipe string on a wireline or wire and a functional insert is installed in the passage channel for recording the reservoir pressure recovery curves in the under-packer space, with an overflow valve installed in it and installed below the insert with a non-return valve and an autonomous pressure gauge, a liquid working medium is fed into the nozzle of the jet pump, creating spaces in the under-packer spaces wells a number of different depressions in magnitude, and for each magnitude of depression, the flow rate of the well is measured, after which the flow of liquid working medium into the nozzle of the jet pump is cut off due to the check valve of the overpacker space of the well from the subpacker and the formation pressure recovery is recorded in the subpacker with an independent pressure gauge space of the well with the possibility of transmitting to the surface via a wireline information from the sub-packer space of the well, then fed to the nozzle of a liquid pump, create a depression on the reservoir, and measure the physical parameters in the borehole zone of the reservoir with an autonomous logging complex, then open the bypass valve in the insert by tensioning the logging cable or wire, thus communicating the over-packer and under-packer wells and thus equalizing the pressure between them, a functional insert is removed to record the reservoir pressure recovery curves, dep kerovku packer and produce lift tubing string with a jet pump, a packer and a logging autonomous complex, wherein during lifting the last recorded physical parameters of the reservoir near-well zone in the range and location of the productive strata about them. 2. The method of operation according to claim 1, characterized in that an additional study of the productive formations is carried out, for which, after removing the functional insert for recording the reservoir pressure recovery curves, a blocking insert with a through axial channel is installed in the flow channel of the jet pump, and the annular is disconnected by means of the blocking insert and in-pipe space of the pipe string, lower the pipe string until the sole of the strata is reached by the autonomous logging complex and fluid is pumped into the well with abnormal and physical properties, such as abnormally high thermal neutron capture cross section, crushing this liquid into reservoirs, whereupon depakerovku packer and rise to the surface of the pipe string with the logging autonomous registration complex physical parameters of the near-wellbore reservoir region. 3. A downhole jet installation comprising a packer installed on the pipe string, an inkjet pump in the housing of which a nozzle and a mixing chamber with a diffuser are installed, a step-through channel and a functional insert installed in the step-through channel, for recording reservoir pressure recovery curves with autonomous with a manometer, while below the packer on the pipe string there is an autonomous logging complex for measuring physical quantities, for example, the electrical resistivity of mountain hydrogen, while the jet pump is installed above the productive strata of the well at a distance h equal to

where h is the vertical component of the distance from the jet pump to the bottom of the reservoir, m; P _PL - reservoir pressure, N / m ² ; ΔP - the maximum allowable value of depression on the reservoir, N / m ² ; g is the acceleration of gravity, m / s ² ; σ is the density of the fluid in the well, kg / m ³ , and the jet pump is configured with the following size ratios: the ratio of the inlet section of the mixing chamber to the diameter D _ks outlet section of the nozzle diameter D _c is from 1.1 to 2.4, the mixing ratio of chamber length to diameter ratio L _k input section D of the mixing chamber is between _kc 3 to 7, the ratio of the nozzle length L _c to the diameter of its output section D _c is from 1 to 8, the distance L from the output section of the nozzle to the input section of the mixing chamber is from 0.3 to 2 diameters of the nozzle exit section D _c , and the angle α tilting the generatrix of the diffuser to the longitudinal The diffuser axis is 4 to 14 °.