FACILITY FOR SECONDARY EXPOSING OF PRODUCING BED Russian patent published in 2009 - IPC E21B43/11 E21B47/06 

FIELD: oil and gas production.

SUBSTANCE: facility of secondary exposing of producing bed consists of assembly of perforator and downhole tool. The downhole tool consists of cylinder protective case 2 pressure tight covered on top with tool head 1 attached to the end of a logging cable, while from below the case is ended with crossover 3 for connection with tool head 1 of the perforator. Also sensors of temperature 4, of pressure 5, locator of couplings 10, and printed circuit boards 9 with electron circuit of sensors 8 signal collection, processing and transmitting to surface in digital code for recording are installed in the downhole tool. Additionally the facility consists of sensor of natural gamma-activity 11. Notably, internal cavity of case 2 comprising sensors and printed circuit boards is made in form of rigid thin wall container 6 secured on the case of the tool on rubber shock absorbers 7. Block of natural gamma-activity sensor 11 contains crystal detector of gamma-quantum 12, photo-electric multiplier 13 and electronic circuit on printed circuit board 14; the block is assembled inside rigid thin wall container 6 on additional shock absorbers: on axial spring one 15 and radial rubber one 16. Electron printed circuit boards are installed in trough-shaped radiators and poured with dielectric compound.

EFFECT: upgraded accuracy of referencing of producing interval to geo-physical section; reduction of general time for complex of operations, reduced wear of logging cable, reduced discrepancy between project and actual value of interval exposure depth; enhanced accuracy of selecting exposed interval with temperature channel.

1 dwg