drilling sub 中文意思是什麼
drilling sub
解釋
鉆井短節-
Along with the progress of drilling technology, many new types of bha such as steering motor assembly, dropping assembly with eccentric bend sub, dropping assembly with flexible connection are developed based on common building, dropping and holding assemblies. for using these bha, a new mathematical model is put forward for 3d static analysis of these types of bha under small deflection. and its weighted residual solution is given. the mathematical model includes ( 1 ) differential equations ; ( 2 ) boundary conditions at drill bit, stabilizer, bend angle, diameter change, tangential point and borehole wall ; ( 3 ) lateral forces and deflection angles of bit. the software based upon this method runs well
為了更好地應用各種新鉆具，建立了適用於對普通下部鉆具、導向鉆具、帶偏心彎接頭和柔性接頭的下部鉆具進行三維小撓度靜力學分析的數學模型，包括（ 1 ）微分方程； （ 2 ）鉆頭、穩定器、彎角、變截面、切點和井壁的邊界條件； （ 3 ）鉆頭的側向力和鉆頭轉角.給出了該模型的加權余量解.用該方法編寫的軟體應用效果良好 -
In this paper, the author synthetically applied continental lake basin high - resolution sequence stratigraphy, sedimentation, well logging, petroleum geology, mathematics geology, etc, on the basis of studying on the core of the well drilling in the district, fully utilize logging well, well drilling core and testing and analyzing materials, adopting well logging - sedimentary facies automatical identification to study the characters of sedimentary facies and sub - facies further. and study sedimentary facies profoundly, and carry on sedimentary facies contrast well to well, to study yanchang 3 sector and yanchang 4 + 5 sector lithofacies palaeogeography character and evolution further
本文綜合應用陸相盆地高解析度層序地層學、沉積學、測井學、石油地質學、數學地質等理論，在對研究區內有關鉆井巖芯觀察的基礎上，充分利用測井、鉆井巖芯以及測試分析資料，並採用測井?沉積相自動識別等方法，深入研究了沉積相、沉積微相特徵，並進行井間沉積相對比，進而探討了長3 、長4 + 5期的巖相古地理特徵及其演化。
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