Slim-hole drilling technology directional branch hole design and control

This paper presents the casing program suitable for the Nanfang marine area, and critical technical problems to be tackled of keeping well vertical in high-steep structures, improving cementing qualities, slim hole drilling techniques, hydrocarbon zone discovery and protection, etc.

提出了南方海相地区井身结构设计、高陡构造防斜打直、提高固井质量、小井眼钻井技术、油气层的发现与保护等关键技术的研究攻关方向。

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Consummate the complete slim hole drilling technology, improve the skill to control the well track, develop the new type slurry system for micro clearance such as fibre slurry, ductile slurry system to improve the well cementing quality of closely-spaced wells.

完善小井眼钻井配套技术提高井眼轨迹控制水平；开发适合于微间隙的新型水泥浆体系如纤维水泥浆、韧性水泥浆体系，以此来提高小间隙井封固质量。

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With the increasing demand of the lateral drilling and slim hole drilling, the coiled tubing ( CT) operating technique will play a great role in horizontal well drilling, well workover and completion.

随着我国侧钻井和小井眼钻井需求的不断增加，连续油管作业技术在我国水平井钻井、修井及完井作业中将会发挥巨大作用。

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On the base of that, the matching construction of the ocean workover rig for side tracking was discussed. This provided a new way for the slim hole drilling.

在此基础上，针对一种具体的钻井工艺完成了海洋修井机用于开窗侧钻作业的配套方案研究，为海洋小井眼开窗侧钻作业提供了一种新的途径。

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Slim hole drilling technology can be used to recover the low permeability poor reservoirs efficiently, as the conventional development method costs too much and produces little profits.

为解决我国大量低渗透、低丰度储量无法动用的问题，近年来分别在大庆、吉林和长庆等油田分公司开展了小井眼钻井技术的研究与试验工作。

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The second part mainly analyse the problems needed to be studied and solved in slim hole drilling technology and so1ution level of them up-to-date abroad.

第二部分着重分析了小井眼钻井技术中需要研究解决的问题，以及国外目前解决的程度。

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The slim hole drilling techniques have been applied to Sulige gas field, Changqing, in order to raise integral development effectiveness to reduce development cost.

为提高整体开发效率，降低开发成本，长庆苏里格气田应用了小井眼钻井技术。

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The status-quo of slim hole drilling technology in China and the world To bore ( a shaft) with a trepan.

国内外小井眼井钻采技术的发展现状钻用钻井机钻（矿井）

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It analysed the feasibility and the limitation of applying mining rig and water well rig to slim hole drilling in shallow gas bearing reservoirs.

分析了矿业钻机与水井钻机用于浅层天然气小眼钻井的可行性及局限性。

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Slim hole drilling can gain more benefit by using lesser investment. The technology has important effect on controlling drilling cost.

小井眼钻井能以较少投资获得较高的勘探开发效益，主要是提高产量或储量，提高采收率，降低钻井成本，小井眼钻井技术对控制钻井成本具有重要意义。

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With the development of drilling technique, deep slim hole drilling technique has become an important technique for treatment geologic case.

随着钻井技术的发展和需要，深井小井眼钻井技术已成为处理地质情况的一项重要的技术手段。

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Discussion on increasing slim hole drilling speed Increasing Peripheral Frictional Resistance of Bore-hole Pile

提高钻孔灌注桩周边摩阻力

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If we use MMA for bedrock consolidation grouting, the parameters of weakly weathered rock can be lifted to the level of slightly weathered or fresh rock.

用于基岩固结灌浆，能使弱风化岩体的参数提高到微风化或新鲜岩体的水平；

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The conclusions are as follows: ( 1) Because of bad physical mechanical property of rock mass, low strength, so many structural planes and minor faults which leads to weak strip after weathered, the homeostasis of the slightly weathered rock slope is serious.

得出以下主要结论：（1）浅变质岩风化层边坡岩体的物理力学性质差，强度低，坡体内构造面、小断层发育，风化后形成软弱带，导致浅变质岩风化层边坡自身稳定性差。

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The kinetic energy is more than 98 percent and energy from effective thrust force is less than 2 percent when drilling in slightly weathered rock or fresh rock.

在风化程度较低或新鲜岩层中钻进时，破碎岩石98%以上的能量来自系统的动能，而轴压力推动钻头位移所给出的能量不到2%；

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Specification: slightly turbid and transparent in appearance;

规格：色状透明、浊；

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Odorless, slightly bitter taste, soluble in water, slightly soluble in ethanol, insoluble in ether.

无臭，味微苦，易溶于水，微溶于乙醇，不溶于乙醚。

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Eliminating shoots led to slightly increase in soluble sugar and starch content of leaf, and no change in other variables.

去笋减库使叶、根的可溶性糖和淀粉含量稍有升高，对其他参数影响不大；

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The dependence of the adsorbability of slightly water soluble metal compounds on the pH value of the solution is very similar to that with activated carbon as adsorbent.

难溶金属化合物在树脂上的吸附率与溶液pH值的关系与采用活性碳作吸附剂的情况十分相似。

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Now Garlic oil injection is withdrawn from markets for its potential hemolytic toxicity caused by Tween-80, a kind of solubilizing agent used to improve the solubility of Garlic oil since Garlic oil is slightly soluble in water.

因大蒜油水溶性差而使用吐温-80作为增溶剂的大蒜油注射液因吐温-80的溶血性，现已被禁止使用，现国内外没有可供注射的大蒜油制剂。

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