Calculation of plastic-deformation parameters of sheet blanks

Translated from Khimicheskoe i Neftyanoe Mashinostroenie, No. 2, pp. 10–11, February, 1990.     

Obtaining thickened portions on thin-walled sheet blanks by compression in an eccentric die

Translated from Khimicheskoe i Neftyanoe Mashinostroenie, No. 6, pp. 34–35, June, 1991.     

新型CO2压裂用增稠剂的增稠性能及机理

为了改善CO₂压裂液的黏度,需要加入适合该体系的增稠剂,笔者以八甲基环四硅氧烷与四甲基四乙烯基环四硅氧烷为原料,六甲基二硅氧烷为封端剂,五甲基二硅氧烷为支链添加剂,四甲基氢氧化铵与氯铂酸为催化剂合成了一种支链聚硅氧烷CO₂增稠剂,并对该增稠剂的结构进行红外光谱（FT-IR）分析。此外,对加入支链聚硅氧烷增稠剂的CO₂压裂液的性能进行了研究。结果表明,在20℃、7%的加量下,加入相同分子量的聚二甲基硅氧烷CO₂压裂液的黏度为1.66mPa×s,而加入硅氧烷增稠剂CO₂压裂液的黏度为6.67 mPa×s,硅氧烷增稠剂增稠效果明显;CO₂压裂液的黏度随着增稠剂浓度的增加而显著改善,增稠剂的浓度在1%~3%时,随压力从8 MPa升高到14 MPa,含支链聚硅氧烷增稠剂的CO₂压裂液黏度升高明显。然而,压裂液的黏度随温度的增大明显降低。新型支链聚硅氧烷增稠剂比聚二甲基硅氧烷的增稠效果明显优异,与国外产品的增黏效果相差较小。同时提出了聚硅氧烷对CO₂压裂液的增稠机理。      

阳离子型稠化酸体系的研制

以丙烯酰胺(AM)和二甲基二烯丙基氯化铵(DMDAAC)为原料,通过反相乳液聚合,制得阳离子型稠化剂GD-1。采用盐酸、乙酸和氢氟酸组成的混合酸与质量分数为1.5%的GD-1复配制得的GD-1稠化酸体系,在60℃和90℃条件下,热稳定性均在80%以上;随着温度升高,其粘度下降幅度明显小于PAM同类产品,且该体系在90℃下能保持表观粘度大于20mPa.s。GD-1稠化酸体系的剪切稳定性也明显好于PAM同类产品,达81%以上;其缓速性能良好,作用时间长达12h,能有效提高酸化效果,可用于高温油藏深部解堵。     

Thickening of petroleum systems. Communication 2

Using scaling theories and the findings of experimental studies, the possibility of obtaining a new generation of viscosity depressants for decreasing the limiting low temperature of pumpability of lube oils of different natures was investigated. __________ Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 3, pp. 31–33, May–June, 2006.     

Thickening of Petroleum Systems. Communication 1

The behavior of oils thickened with atactic polypropylene (APP) at low temperatures is examined. The positive effect of a crystalline phase in APP on the viscosity-temperature properties of thickened oils at low temperatures is demonstrated. __________ Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 5, pp. 39 – 41, September – October, 2005.     

A machine for rolling and coiling of the ends of tubular blanks

Translated from Khimicheskoe i Neftyanoe Mashinostroenie, No. 8, p. 30, August, 1992.