常見例句雙語例句Productivity Ratio(PR) is firstly put forward to evaluate the effect of gravel-packing sand control measure on gas well productivity.提出了以防砂產(chǎn)能比作為防砂措施對(duì)氣井產(chǎn)能造成影響的評(píng)價(jià)指標(biāo)。Packing can be made from wide range of commercial and home made materials-steel, wool, wood chips, coke, gravel etc. Gas is passed through bottom and removed at top.包裝可從商業(yè)和自家做的各種材料,鋼材,羊毛,木屑,焦炭,礫石等氣體是通過底部和頂部刪除。www.tech-domain.comIncipient motion of solid grain in solid-liquid two\phase flow is often concerned in many petroleum technologies, such as horizontal drilling, gravel-packing and sand washing.水平井鉆井、礫石充填及沖砂等作業(yè)都涉及到固液兩相流動(dòng)的固體顆粒起動(dòng)問題。 返回 gravel packing