Patent ID: 7051816
Filing Date: 2006-05-30
Classification: F04F

Abstract:
1. The well jet device for testing and developing wells, comprising, installed on a piping string down-top, an input cone with a shank, a packer with a through passage and a jet pump, in a body of which one or several active nozzles with their respective mixing chambers and passages for supplying an active medium are axially arranged, and a stepped through passage is made with a mounting seat between steps for installing a sealing assembly having an axial passage, said device being provided with a transmitter and a receiver-transducer of physical fields, which is arranged at the jet pump side for entry of the medium pumped out of the well and installed on a cable or a wire fed through the axial passage of the sealing assembly, the output of the jet pump is connected to the piping string above the sealing assembly, the input side of the jet pump passage for supplying pumped out medium is connected to the piping string below the sealing assembly, and the input side of the passage for supplying the working medium to active nozzle is connected to space surrounding the piping string, and in the body of the jet pump several passages for supplying the pumped out medium are made, an input cross-section of the input cone is located not lower than the roof of a productive stratum, the total area of the cross-sections of the passages for supplying the active medium is not less that the total area of the output cross-sections of the active nozzles, the axis of each active nozzle is parallel to the axis of the through passage in the body of the jet pump and is located from the latter at the distance L being not less than 0.55 diameter D 1 of the bigger step in the through passage made in the body of the jet pump or at the distance L being not less than 0.575 diameter D 2 of the lesser step in the through passage made in the body of the jet pump, the sealing assembly is movably arranged on the well-logging cable or a wire fed through axial passage in the sealing assembly and installed with the possibility of being alternatively replaced by the functional inserts, including at least one of a hydrostatic testing insert, a depression insert, a blocking insert which is made with or without a bypass passage, an insert for recording curves of stratum pressure restoration in the under-packer space and an insert for hydrodynamic vibration impact on the near-well zone of the productive stratum; the diameter D 3 of the axial passage in the sealing assembly is not greater than 0.6 outer diameter D 4 of the sealing assembly, the axes of the sealing assembly and the functional inserts are aligned with the axis of the through passage in the jet pump; the functional inserts are adapted for installation thereon below autonomous well instruments as well as have, in their upper part, a tool for delivery and removal of them from the body of the jet pump with the use of cable equipment, the well-logging cable or wire are made with a cap for attaching well instruments, the sealing assembly is adapted for installation on the well-logging cable or wire without disconnecting the cap from them, the transmitter and receiver-transducer of physical fields are connected to the cap of the well-logging cable replaceable by other well instruments, including, a perforator, an ultrasonic transmitter, a thermometer, a pressure gauge, a flowmeter, a sampling device, which all may be lowered, either in turns or in one assembly, along the through passage of the jet pump body on the well-logging cable or wire into the well, the outer diameter D 5 of the jet pump body being at least 2 mm less than the inner diameter D 6 of the casing string in the well where it is installed, the diameter D 4 of the sealing assembly being at least 1 mm less than the inner diameter D 7 of the piping string above the jet pump, the diameter D 8 of the transmitter and receiver-transducer of physical fields being at least 1 mm less than the diameter D 2 of the lower step of the through passage in the jet pump body and than the diameter D 9 of the through passage in the packer, the diameter D 10 of the well-logging cable or wire being at least 0.001 mm less than the diameter D 3 of the axial passage in the sealing assembly, and in the lower part of the passages for supplying the pumped out medium positions for installing check valves or plugs are made.