bullet perforation

基本解釋

Based in these, barrier thickness criteria for both YD-89 bullet conventional perforation and limited entry fracture treatment completion methods are suggested.
在此基礎(chǔ)上提出了YD-89彈普通射孔和限流法壓裂兩種完井方式條件下的隔層厚度標(biāo)準(zhǔn)。
The main part of the technique is the complex perforator, which is consisted of a small long-radial ratio and large perforation diameter bullet and a front chamber filled with san.
其核心部件是復(fù)合射孔器，由小長(zhǎng)徑比大孔徑射孔彈和裝有防砂材料和助推火藥的前倉(cāng)組成。