| 摘要 |
FIELD: oil and gas industry. ^ SUBSTANCE: nozzle for hydraulic jet perforator includes housing with a lug and hard-alloy jet insert with variable cross section hole; at that, nozzle is equipped with protective nut, and connecting thread for connection to protective nut is made on external part of the housing lug. ^ EFFECT: increasing service life of hydraulic jet perforator, namely increasing service life of the housing. ^ 1 dwg |
