抗盐降滤失剂SDX的研究与应用

介绍了抗盐降滤失剂SDX的合成方法与现场应用简况,评价了SDX的抗温、抗盐、防塌及配伍性能。试验结果表明,SDX能耐150℃以上的高温,可抗盐至饱和,具有良好的降滤失和抑制性能,与其它处理剂的配伍性好,适用于各种水基泥浆。     

可生物降解的钻井液降滤失剂SPS的合成与性能研究

以淀粉为主要原料合成了一种可生物降解的钻井液滤失剂ＳＰＳ，考察了ＳＰＳ的生物降解性及其在淡水泥浆，盐水泥浆和海水泥浆中的性能。结果表明，ＳＰＳ具有良好的降滤失与抗温、抗污染性能，在海水中可被生物降解。     

New concept of surface modification to LiCoO2

As the continuance of our series study on LiCoO₂ surface modification, the complicated traditional surface coating method is replaced with simple addition of amorphous YPO₄ and Al₂O₃ in commercial LiCoO₂ or in commercial electrolyte based on our understanding to the improvement mechanism of surface modification. Comprehensive studies by X-ray photoelectron spectroscopy (XPS), gas chromatography and mass spectroscopy (GC–MS), inductively coupled plasma (ICP) and Fourier transformed infrared (FTIR) indicate that the products of spontaneous reaction between the additive and the LiPF₆ based electrolyte are responsible for the performance improvements.     

Continuous formation of slurry ice by cooling water–oil emulsion in a tube

Water-silicone oil emulsion with an additive, (C₂H₅O)₃SiC₃H₆NH₂, was examined as a heat storage material. A spiral tube used as a heat exchanger was immersed in a low temperature bath and the emulsion was circulated in the tube to make ice continuously. Ice was separated from the ice–liquid suspension in an outlet tank. The amount of formed ice, the temperatures of the inlet and the outlet of the heat exchanger, and the temperatures in the tube wall were measured and the overall heat transfer coefficient and the heat flux through the tube were calculated. Experiments were carried out, varying the flow rate, the temperature of cooling brine, and the thickness of tube wall. The condition under which slurry ice was formed continuously without adhesion of ice to the cooling wall was clarified. Though decrease in the thermal resistance of the tube increased the rate of ice formation or raised the brine temperature, it narrowed the range of the flow rate and of the brine temperature in which slurry ice was formed continuously.     

无荧光防塌降失水剂KH－931的合成与性能

ＫＨ－９３１是以褐煤、丙烯酰胺、丙烯腈为原料制得的无荧光防塌降失水剂。本文简介了ＫＨ－９３１的合成条件，并对ＫＨ－９３１的防塌作用与降滤失作用进行了室内评定。实验结果表明，ＫＨ－９３１的防塌、降失水效果良好，并具有加量少、无荧光的特点。腐殖酸衍生物，降滤失剂，页岩抑制剂，多功能钻井液处理剂，荧光性，实验室研究     

A Study of the Compatibility Between Asphalt and SBS

In this article, the compatibilities between different components of a base asphalt and styrene butadiene styrene (SBS) have been analyzed from microscopic structures. Specifically, the asphalt was separated into three components: saturates, aromatics, and resins, by Solvent Recycled Absorption Chromatography Separation Technology (SRACST). The compatibilities between these different components and the polymer were compared with the help of Fluorescence Microscope (FM) with which the existing state of the polymer SBS in these different components could be examined obviously. The modified effects indicated that aromatics could cause SBS swollen and, resins dissolved SBS better than saturates, though both the two components could partially dissolve SBS and the two mixtures presented two immiscible phase systems. In order to further investigate the compatibility between aromatics and SBS, from macroscopic properties, an additive rich in aromatics was added to the SBS/asphalt mixture, and the result was satisfactory.     

雾化液在空气-雾化钻井中的作用

在干空气钻井过程中出现地层产出液处理困难和井下不正常等现象时,常需将干空气钻井转交成空气-雾化钻井。雾化液是由表面活性剂、高分子量聚合物、井壁稳定剂等处理剂组成的。雾化液功能包括充分乳化地层产出液,促使并保持环空呈雾化稳态流,分离油永滴和钻屑团,增强空气流携屑、携水能力;抑制页岩水化并在井壁形成液膜,减小空气冲蚀作用,减小井壁摩阻。雾化液中表面活性剂的性能和浓度,及其它处理剂的水化溶解程度都会影响空气-雾化液性能。地层出液量监测对保障空气-雾化钻井顺利进行起着十分重要的指导作用。     

低荧光阳离子防塌剂WFT─666的合成与性能

ＷＦＴ－６６６是由磺甲基腐殖酸钾、有机硅聚合物、低分子阳离子有机化合物、苯酚、甲醛缩聚而成的一种新型阳离子低荧光防塌剂。本文介绍了ＷＦＴ－６６６的合成及室内性能评定结果。ＷＦＴ－６６６可抗盐至饱和盐水，抗钙和镁，耐２００℃高温，荧光显示低。用该剂处理的钻井液性能稳定，流变参数合理，页岩回收率高，页岩相对膨胀率低，页岩稳定指数高，与其它处理剂的配伍性好。     

Nonnegative integral subset representations of integer sets

We consider an integer-subset representation problem motivated by a medical application in radiation therapy. We prove NP-completeness, derive nontrivial bounds, and report on the performance of a greedy heuristic.