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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. 鑽時降低至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,常常靠提高鑽井液密度來保證井壁穩定,嚴重的制約了鑽速的提高。
- 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. 在鑽井機械鑽速預測研究中,以前常根據現場數據或試驗數據統計擬合得出經驗或半經驗方程,方程一般含有一些很難確定的係數甚至是不可靠的。
- Advances in polycrystalline diamond compact( PDC) bits have sharply increased rate of penetration( ROP),reduced drilling time and costs in oil and gas wells. 聚晶金剛石複合片(PDC)鑽頭的發展及應用,大大提高了鑽井的機械鑽速(ROP),減少了鑽井時間,降低了鑽井成本。
- 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. 複合片鑽頭的鑽速與其切削齒的自銳性密切相關,鑽頭台架試驗反映了這種內在聯繫,並用平均鑽速((?))和平均鑽速變化率((?))等指標對複合片自銳性能進行描述與評價。
- 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. 在對各種鑽速預測模式進行分析的基礎上 ,提出利用改進后的人工神經網路BP演算法理論完成對鑽井過程中機械鑽速的預測
- 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. 在油田氣體鑽井中使用KQC系列空氣錘,解決了泥漿鑽井在中硬以上地層中鑽速慢、易井斜的難題。
- By power we mean the rate of doing work. 我們說功率就是指做功的速率。
- Critical rate of rise of off-state voltage 斷態電壓臨界上升率
- 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,由於增強了持水力,降低了冰點,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. 發病率發生疾病的概率
- 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. 採用平麵塑性變形的滑移線理論和上限理論對開式擠壓成形工藝中的臨界最小和臨界最大變形率進行了分析計算,給出了擠壓模角與臨界最小和臨界最大變形率的對應關係;
- 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秀的小說家。