轻便式气囊隔离随钻压水试验器的研制与应用

Development and application of a portable pump-in tester while drilling with airbag isolation

摘要:

水利水电工程勘察中，经常要进行钻孔压水试验。为提高压水试验效率，研发了一种可配合绳索取心钻具使用的轻便式气囊隔离随钻压水试验器。试验过程中，在不全部提钻的情况下，从绳索取心钻杆内快速下入试验器，通过使用橡胶气囊及气水分流的手段进行钻孔压水试验。本文对其工作原理、结构组成和关键技术进行了详细介绍，并在云南某水电工程项目上进行了现场试验。结果表明，采用该试验器结构简单，可靠性高，制造成本低，试验过程中可显著降低劳动强度、提高生产效率，且可根据实际需要制作成?75 mm、?91 mm等多种规格，与绳索取心钻进做压水试验配套使用，从而解决绳索取心技术在水利水电行业的推广难题。

Abstract:

In the investigation of water resources and hydroower engineering， the pump-in test is often carried out. In order to improve the efficiency of pump-in test， a portable pump-in tester with airbag isolation was developed， and the tester can be used with wire-line core drill tool. During the testing process， without lifting all drill string out of hole， the portable tester can be quickly lowered down to the hole bottom from the hollow of the wire-line core drill string， and the pump-in test was conducted by using rubber airbag and air-water diversion device. In this paper， the working principle， structure compositions and key techniques of the portable tester are introduced in detail， and the field test is conducted in a hydropower project in Yunnan Province. The field test results show that the tester structure is simple， high reliability， low manufacturing cost， and it can significantly reduce labor intensity， improve production efficiency during the test. Furthermore， it can be made out to ?75mm， ?91mm and other specifications according to the practical application， which solves the challenge of wier-line core drilling technology promoted in water resources and hydropower industry.