您要查找的是不是：
- The flexible drill string is one of the key tools to materialize the high accuracy directional drilling technique. 撓性鉆桿是實(shí)現高精度定向鉆孔技術(shù)的關(guān)鍵器具之一。
- The drill string is rotated by rotary table. 鉆柱是由轉盤(pán)驅動(dòng)的。
- Saltwater mud is known to have a very strong corroding effect on drill string. 人們知道,鹽水泥漿對鉆具有很強的腐蝕作用。
- Displace mud with 30 SPM each 30 minutes while working the drill string. 每30分鐘頂替泥漿30沖，同時(shí)活動(dòng)鉆柱。
- The calculation results demonstrate the effective eccentricity and the lifting force of the upper drill string are the major influential factors. 計算結果表明，有效偏心距和上部鉆柱的提升力是影響近井口套管偏磨的主要因素。
- Analysis of friction on drill string in horizontal drilling. 水平井管柱下入摩阻分析及應用。
- You must keep trying to find a new way to protect the drill string from sticking. 你們應當堅持設法找出防止鉆具被卡的新方法。
- In the course of sidetracking of horizontal holes, lateral drill string vibration often occurs. 在水平井的側鉆過(guò)程中,鉆柱很容易發(fā)生橫向振動(dòng),引發(fā)鉆柱失效、井眼擴徑等嚴重事故。
- The results show that longitudinal vibration of drill string is relative to rotary speed and weight on bit(WOB). 實(shí)驗結果表明,鉆柱的縱向振動(dòng)主要與轉速和鉆壓有關(guān)。
- Its main functions are maintaining borehole gage,improving drill string stability and protecting lower drill string from excessive wear. 其重要作用是保持鉆頭尺寸符合標準，提高鉆桿穩定性，避免鉆桿下部過(guò)于磨損。
- An example proved the view, while the WOB is transferred by spring and fluid pressure, the vibration of drill string can lie diminished. 實(shí)例分析驗證了這種觀(guān)點(diǎn)。同時(shí)由于壓力是靠彈簧和液壓傳遞的，所以其還有減振的效果。
- Therefore we can provide the preanalysis and treatment plans for similar drill string falling accident,so as to shorten accident-losing tim... 為現場(chǎng)處理類(lèi)似的鉆柱落井事故提供預先的分析和處理方案,以縮短事故處理時(shí)間,減少經(jīng)濟損失。
- Based on the interaction of bit and formation, the force from the rock and bit is used for the boundary condition of the end of the drill string. 在建立了牙輪鉆頭與井底巖石互作用模型的基礎之上,將鉆頭與井底巖石互作用力矩作為鉆柱的下端邊界條件。
- A multithread wireless system is developed to measure the four-component forces acting on a simulated drill string on a LabVIEW workbench. 為分析鉆桿的井下受力狀態(tài),應用直梁應變片式測力傳感器,研制了一種基于虛擬儀器平臺的鉆桿四分量力測量系統。
- The bigger the effective eccentricity, the higher the upper drill string's lifting force, the higher the positive pressure on casing/ drill string, and the more serious the wear. 有效偏心距越大，上部提升力越大，套管/柱之間的正壓力將越大，磨損將越產(chǎn)重。
- The analyze of this paper is based on the practice, it can provide bases to Straight Well as well as ERW drill string dynamic problem, it is valuable in engineering. 本文的分析切合實(shí)際，對直井及大位移井鉆柱因振動(dòng)而引起的動(dòng)態(tài)問(wèn)題的分析提供依據，具有工程使用價(jià)值。
- Fluid is conveied to bit nozzel through drill string from pump is a transient state flowing with pressure wave, which makes the fluid jetted out from nozzel has certain pulsation. 從鉆井泵經(jīng)過(guò)鉆柱內部輸送到鉆頭噴嘴的流體是一種瞬態(tài)流動(dòng)，存在著(zhù)壓力行波，使從普通噴嘴射出的流體有一定程度的脈動(dòng)。
- Method We established perfect nursing emergency project,set up nursing risk management team,designed scientific and flexible drilling scene and methods and focused on continuity quality improvement. 方法制訂完善的護理應急預案,成立健全的護理風(fēng)險管理組織,設置科學(xué)、靈活的演練場(chǎng)景及方法,堅持質(zhì)量持續改進(jìn)。
- The drill string of ERW is taken as research object, the dynamic problem is brought forward during making hole, and the mechanics model about each dynamic action is established. 以大位移井鉆柱的部分或整體為研究對象，提出了鉆井各種動(dòng)態(tài)問(wèn)題，建立了鉆柱的各種動(dòng)態(tài)行為的力學(xué)模型。
- The classical fracture mechanic can only explain the static fracture problem of drill string, but it is incapble of explain drill string failure under dynamic load. 傳統的斷裂力學(xué)只能解釋石油管柱靜態(tài)斷裂問(wèn)題，而不能解釋動(dòng)載下鉆柱失效問(wèn)題。
