井下增压器水力设计的探讨

SOME OPINIONS ON THE HYDRAULIC DESIGNING OF DOWN HOLE BOOSTER

赵国珍 王德玉

zhao Guozhen Wang Deyu

中国石油天然气总公司 西南石油学院

喷射钻井可以提高钻速,超高压射流钻井又可提高钻速2~3倍,但由于设备要承受超高压,所以未获实际应用。80年代末研制成双管钻井系统,用常压大排量携岩,高压小排量破岩,用的是地面增压器,其可靠性差、成本高。目前引起钻井界普遍重视的是井下增压.它克服了双管钻井系统的缺点。本文阐述了井下增压器研究对提高钻井速度的意义,分析了静压式井下增压器的动力来源和要求,并提出了两种典型井下增压器水力设计的计算方法。

Jet drilling can increase the drilling rate,while overpressure jet drilling could increase of 2-3 times. It was not used in practice because of the overpressure applying on the equipment. The dual string drilling system was developed by the end of the 1980s,carring cuttings with high flow rate under normal pressure and cracking rocks with low flow rate under high pressure. In this system, the surface booster was used, but its reliability was low while the cost was high. At present,it is down hole booster that has caused much attention to the drilling field,it solved the problems of the dual string drilling system. It was stated the meanings of the study on downhole booster to the improving of drilling rate, analyzed the power and requirment of the static pressure down hole booster. The author recommended the hydraulic designing and calculation method of two kinds of typical downhole booster.

10.3969/j.issn.1000-7393.1995.04.005