| 摘要 |
FIELD: well operation, particularly to stimulate marginal and temporary shut-in oil and gas wells. ^ SUBSTANCE: downhole instrument comprises measuring head 2, decision device 3, executive device 4, recorder 5 and AND circuit 6. All above components are located in common case 1. Measuring head 2 comprises sensor unit 7 and analog-digital converter unit 8. Decision device 3 includes time sensor 11, comparator unit to compare current parameter values with threshold values 9 thereof and AND circuit unit 10. Time sensor may comprise clock-pulse generator 12 provided with electromechanical switch 13 and pulse counter 14. Recorder 5 may be made as removable memory card. Executive device 4 may comprise capacitive storage 15 and electronic commutator. Capacitive storage 15 may include accumulator, multivibrator, high-voltage transformer, rectifier and high-voltage condenser. ^ EFFECT: extended range of functional capabilities of downhole instrument. ^ 5 cl, 2 dwg |
