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hole enlargement
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  井径扩大
     The modified KCl/polymer drilling fluids can reduce the maximum hole enlargement rate from 68% to 8% , and shorten the well construction time by 28%.
     完井电测数据表明,最大井径扩大 率由68%下降至8%,同时使建井周期缩短28%。
短句来源
     In Tahe oilfield, many challenges of drilling fluid operation exist: cutting carrying and wall building problems in the φ 445 mm hole, pipe sticking in the φ 311 mm hole, hole enlargement and formation damage in the φ 215.9 mm hole, lost circulation and well kicking in the φ 150 mm hole and productionformation protecting problem of Ordovician system.
     塔里木塔河油田在钻井过程中 ,经常遇到钻井液难点 :φ 4 4 5mm大井眼中的携砂和造壁问题 ,φ 311mm井眼中的阻卡问题 ,φ 2 15 .9mm井眼中石炭系地层井径扩大和油气层保护问题 ,φ 15 0mm井眼的漏失和井涌以及奥陶系地层的油气层保护问题。
短句来源
     Field trials showed that non-drilling time was reduced from the average 1.69% to 1.42% and average drilling period was shortened from 182.1 d to 133.2 d. The average hole enlargement in the pay zone was also reduced from 15.81% to 9.4% and the cementing quality more than 90% exhibited excellent. So the cation drilling fluid developed can meet the requirements of drilling operations in this area.
     30多口应用井的统计结果表明,复杂情况和事故时间由原来的年平均1.69%下降为1.42%,平均钻井周期由原来的182.1 d缩短到133.2 d以内,油层段平均井径扩大率由15.81%下降为9.4%,固井质量优质率在90%以上。
短句来源
     Field using showed that the highest drilling fluid density was 1. 37 g/cm3 , and by applying the comprehensive sloughing control measures, the hole was effectively stabilized and the hole enlargement in the third section was successfully solved.
     现场应用表明,该井实际最高使用钻井液密度为1.37 g/cm3.通过采用高包被、强抑制和综合防塌相结合的方法,有效地稳定了井壁,成功地解决了三开井径扩大问题;
短句来源
     Its field using in well DH1-8-6 is presented, and using results show that the average hole enlargement for the second section is 5. 4%;
     介绍了有机盐钻井液在DH1-8-6井的现场应用情况。 应用结果表明,该井二开段井眼平均井径扩大率为5.4%;
短句来源
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  井眼扩大
     The cement only returned to the depth of 1011m because the hole enlargement rate was not enough to be estirnated.
     因对井眼扩大率估计不足,水泥只封到1011m。
短句来源
     This drilling fluid has low filtration and good wall building capability, which can effectively prevent the hole enlargement;
     该钻井液滤失量低,具有良好的造壁性能,能够有效防止井眼扩大;
短句来源
  “hole enlargement”译为未确定词的双语例句
     Based on the analysis of the construction technology of secant piles in alluvium,the phenomenon of hole enlargement is studied.
     通过分析冲淤沉积层的特点和套管咬合桩的施工工艺,对套管咬合桩在冲淤沉积层中的扩径现象进行研究。
短句来源
     The ballistic limit of nitrogen alloyed austenitic stainless steel of HRC35.5 in hardness is 570m/s, which is better than traditional armour steel of over HRC45 in hardness, the perforaion mechanism is different, the former is ductile hole enlargement,no plugging damage,but plugging damage in the latter.
     硬度为HRC35.5的含氮奥氏体不锈钢的背面强度极限为570m/s,优于硬度在HRC45及以上传统装甲钢的抗弹性能,穿甲机制不同,前者的穿甲破坏形式为塑性扩孔,没有发生冲塞破坏而传统装甲钢产生了冲塞破坏。
短句来源
     The influence of the rear face of the plates on ductile hole enlargement is involved in the second stage.
     考虑靶板背面自由边界的影响 ,应用Taylor扩孔理论计算延性扩孔型穿孔第二阶段耗能 ;
短句来源
     Field using showed that the hole enlargement rates in the Triassic system and Carboniferous system are 5. 82% and 5. 43% respectively, and regular borehole was drilled.
     现场应用表明:三叠系井径平均扩大率为5.82%,石炭系为5.43%,井径质量达到了优质标准;
短句来源
     Yanxia exploration well in Tahe oilfield, with a designed total depth of 6300 m, has a third opening interval (φ 311.1 mm) of 3000~5300 m in which major hole stability problems faced is as follows: The hard brittle mudstones in the upper formation of Jura-Triassic and Carboniferous and the basalts in Permian is prone to strip and drop when drilling and sloughing and severe hole enlargement frequently occurred.
     塔河油田盐下探井设计井深在6300m左右,三开φ311.1mm井段为井深3000~5300m。 在这一井段面临的井眼稳定问题主要是:①侏罗系—三叠系、石炭系上部硬脆性泥岩及二叠系玄武岩地层易剥落和掉块、坍塌,扩径严重;
短句来源
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  hole enlargement
Numerical dynamic solutions of the circular hole enlargement problem for a thin plate, due to a constant acceleration imposed at the hole boundary, have been used for comparing different models for describing rate sensitive visco-plastic materials.
      
Conversely, the hole enlargement and transverse bend data showed that the dual-phase steels are somewhat poorer than comparable HSLA steels in fracture-limited formability.
      
Two perforation mechanisms, i.e., the hole enlargement for a sharp projectile nose and the plugging formation for a blunt projectile nose, are considered in the proposed analytical model.
      
Electron backstreaming due to accelerator grid hole enlargement has been identified as a failure mode.
      


The salt precipitation inhibitor Ⅱ consists mainly of potassium ferrocyanide,K_4 Fe(CN)_6. It increases the solubility of salt in water and lowers salt dissolving.With this chemical aid the crystal habit of precipitated salt is modified from cubic form to dendritic(snowy)one, tiny salt crystals are packed loosely and can be removed easily.It is suitable for high calcium containing muds with pH 7—12.In the field test of salt precipitation inhibitor Ⅱ in one well, salt content of filter liquor of the mud with...

The salt precipitation inhibitor Ⅱ consists mainly of potassium ferrocyanide,K_4 Fe(CN)_6. It increases the solubility of salt in water and lowers salt dissolving.With this chemical aid the crystal habit of precipitated salt is modified from cubic form to dendritic(snowy)one, tiny salt crystals are packed loosely and can be removed easily.It is suitable for high calcium containing muds with pH 7—12.In the field test of salt precipitation inhibitor Ⅱ in one well, salt content of filter liquor of the mud with the chemical added is increased from 2.95×10~5 ppm to 3.03×10~5 ppm.The calliper log shows a decrease of the ratio of hole enlargement about 50% in the depth interval under control(3400-3440m)as compared with that of a neighbour well. It is interesting to state that in the interval 3320-3360m where drilling was performed on the mud with no salt inhibitor added,a 25-30% decrease of the ratio of hole enlargement is still measured.

Ⅱ号盐抑制刺能增加盐在水中的溶解度,降低盐在水中的溶解速度,并使盐的晶体形状由立方体变为树枝状,降低晶体在固体上的附着力。它适用于不同碱度的饱和盐水泥浆,可抗高钙的化学环境。在广35井现场试验中,泥浆中加入Ⅱ号盐抑制剂后,滤液含盐量增加,钴穿盐层时不上提下放扩眼,无遇阻遇卡现象,盐层井段井径扩大率较对比井减小25—50%。

This paper aimed to the experimental study of the machined quality with the DF deep hole drilling system, which was deve- loped by ourselves and could stablely drill deep hole with high accuracy and efficiency. In these experiments, the variables were cutting speed, feed rate and machined material and the quality indexes were smooth finish ellipticity and hole enlargement. The curves of relationship between each variable and quality indexes were obtained, and the results were analysed. The conclusion are...

This paper aimed to the experimental study of the machined quality with the DF deep hole drilling system, which was deve- loped by ourselves and could stablely drill deep hole with high accuracy and efficiency. In these experiments, the variables were cutting speed, feed rate and machined material and the quality indexes were smooth finish ellipticity and hole enlargement. The curves of relationship between each variable and quality indexes were obtained, and the results were analysed. The conclusion are of important value for reference for the spreading use, selection of machine parameters and quality control of DF deep hole dril- ling systems.

本文以我们在DF深孔钻削试验中已取的效果为依据,对切削速度、进给量及工件材质等参数对加工孔的光洁度、椭圆度及孔扩张量的影响进行了分析研究,其结论对于DF系统的推广应用、加工参数选择及钻削孔的质量控制都具有重要参考价值。

This paper put emphasis on the researches of Shell-type Azimuth Controller (STAC Tool) for rotary drilling. A new drilling technique of using STAC Tool assembly to control drilling trajectories is proposed and developed. It can be used without down hole mud motor with a bent sub, speed up ROP and improve the drilling quality. This is one of the innovations in drilling techniques. In this paper, a quantitative three-dimensional mechanical analysis has been made by using beam-column theories; three dimensional...

This paper put emphasis on the researches of Shell-type Azimuth Controller (STAC Tool) for rotary drilling. A new drilling technique of using STAC Tool assembly to control drilling trajectories is proposed and developed. It can be used without down hole mud motor with a bent sub, speed up ROP and improve the drilling quality. This is one of the innovations in drilling techniques. In this paper, a quantitative three-dimensional mechanical analysis has been made by using beam-column theories; three dimensional analysis method of STAC is developed and applied to complete theoretical computations. The results indicate that azimuth can be adjusted and improved by changing some parameters; harmful effects of hole enlargement can be overcome and inclination can be increased by attaching a bent sub at the bottom of the tool. This paper deducted the inherent regularities that influence the new technique. All of these shows that STAC Tool can be extensively used in deviation control. Through practical drilling practices in the Daqing Oilfield and the Liaoho Oilfield, satisfactory results have been achieved, which shows an agreement between theories and practise. Thus this technique can be field applied.

提出了用套筒型变向器钻具组合控制井眼轨道钻井新工艺,可以避免应用井下动力钻具,提高钻井速度和质量,是钻井工艺革新的方向之一。应用纵横弯曲理论提出对变向器的三维力学定量分析方法,并进行全面理论分析。结果表明,改变变向器有关参数能调整及提高变向能力;采用变向器下端接小角度弯接头等方法,可以克服井眼扩大所产生的不利影响,同时提高变方位和造斜能力,从而推演出影响新工艺的内在规律,显示了变向器具有宽广的应用前途。通过在大庆等油田进行现场试验,获得满意的试验效果。反映了理论与实际的一致性。

 
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