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- The total gas value rose from 0.02L to 0.03L as rate of penetration (ROP) got down to 2 min/m. 鉆時(shí)降低至2分鐘/米，全烴由0.;02升高到0
- Especially in nonresistant strata，in order to keep borehole wall stability we usually raise the drilling fluid density，but it seriously impede the rate of penetration. 尤其是不穩定地層，常?？刻岣咩@井液密度來(lái)保證井壁穩定，嚴重的制約了鉆速的提高。
- For the research of the rate of penetration (ROP) prediction,the empirical or semiempirical equations of the ROP are derived from the laboratory or field data before. 在鉆井機械鉆速預測研究中,以前常根據現場(chǎng)數據或試驗數據統計擬合得出經(jīng)驗或半經(jīng)驗方程,方程一般含有一些很難確定的系數甚至是不可靠的。
- Advances in polycrystalline diamond compact( PDC) bits have sharply increased rate of penetration( ROP),reduced drilling time and costs in oil and gas wells. 聚晶金剛石復合片（PDC）鉆頭的發(fā)展及應用，大大提高了鉆井的機械鉆速（ROP），減少了鉆井時(shí)間，降低了鉆井成本。
- The rate of penetration of PDC bits relates closely to its self-sharpening property.This relation can be tested through rig test which is performed with standard PDC test bit. 復合片鉆頭的鉆速與其切削齒的自銳性密切相關(guān),鉆頭臺架試驗反映了這種內在聯(lián)系,并用平均鉆速((?))和平均鉆速變化率((?))等指標對復合片自銳性能進(jìn)行描述與評價(jià)。
- critical rate of fall of commutating current 換向電流臨界下降率
- After analyzing diversified forecast models for the rate of penetration, the ROP forecast method with BP arithmetic theory of improved artificial nerve nets was taken to calculate the ROP during drilling. 在對各種鉆速預測模式進(jìn)行分析的基礎上 ,提出利用改進(jìn)后的人工神經(jīng)網(wǎng)絡(luò )BP算法理論完成對鉆井過(guò)程中機械鉆速的預測
- What's the going rate of computer programmers? 計算機程序設計人員的一般工資是多少？
- Critical Rate of Rise of On-State Current 導通狀態(tài)的電流上升臨界值
- KQC series of air hammers used in gas drilling can solve certain problems,such as lower ROP(Rate of Penetration) and well deviation,which occurred in mud drilling in above medium hard formation. 在油田氣體鉆井中使用KQC系列空氣錘,解決了泥漿鉆井在中硬以上地層中鉆速慢、易井斜的難題。
- By power we mean the rate of doing work. 我們說(shuō)功率就是指做功的速率。
- Critical rate of rise of off-state voltage 斷態(tài)電壓臨界上升率
- The rate of electrolyte seepage was smaller.Dissolubility sugar and proline content increased.These all strengthened the regulating ability of penetration, raised the anti-cold ability of the plant. 滲透調節物質(zhì)可溶性糖、脯氨酸含量大幅度提高，增強了細胞的滲透調節能力，增加了植物組織束縛水的含量，由于增強了持水力，降低了冰點(diǎn)，從而提高了植株的抗冷性。
- critical rate of rise of off state voltage 電壓臨界上升率
- critical rate of rise of off-state volta 斷路電壓上升臨界速率
- critical rate of decrese of on-state cur 接通電流臨界下降率
- The rate of incidence of a disease. 發(fā)病率發(fā)生疾病的概率
- Maximum and minimum critical rates of deformation in open die extrusion are discussed on the basis of the slip field theory and the upper bound theory of plane state plastic deformation. 采用平面塑性變形的滑移線(xiàn)理論和上限理論對開(kāi)式擠壓成形工藝中的臨界最小和臨界最大變形率進(jìn)行了分析計算，給出了擠壓模角與臨界最小和臨界最大變形率的對應關(guān)系；
- The rate of inflation must be held down. 通貨膨脹率必須控制在低水平上。
- The critic rated him as an excellent novelist. 評論界認為他是一名優(yōu)秀的小說(shuō)家。
