CAJ | 학술논문

小口径地质勘探不断向深部发展，受地层条件、孔内事故和孔斜要求等因素影响，很多钻孔需要定向钻进施工。而小口径钻孔一般采用饱50、60 mm钻具无法满足随钻仪器的下入要求。通过技术攻关及数次现场试验和改进，研制成功了一套小直径电缆湿接头，较好地解决了小通孔钻杆随钻受控定向钻进的关键技术及难点。具体方案为：把测量探管和传输电缆分开，定向测量探管事先与钻具连接，随钻具下放到预定深度，电缆连接信号上接头由钻杆内腔下入，与探管顶部的信号下接头在钻井液中实现电气连接和信号传输，完成定向作业。该方法在国投新集杨村煤矿DF33断层地面探测及注浆工程和莲塘李井田煤炭勘探中进行了试验并成功应用。具有一定的推广应用价值。
소구경지질감탐불단향심부발전，수지층조건、공내사고화공사요구등인소영향，흔다찬공수요정향찬진시공。이소구경찬공일반채용포50、60 mm찬구무법만족수찬의기적하입요구。통과기술공관급수차현장시험화개진，연제성공료일투소직경전람습접두，교호지해결료소통공찬간수찬수공정향찬진적관건기술급난점。구체방안위：파측량탐관화전수전람분개，정향측량탐관사선여찬구련접，수찬구하방도예정심도，전람련접신호상접두유찬간내강하입，여탐관정부적신호하접두재찬정액중실현전기련접화신호전수，완성정향작업。해방법재국투신집양촌매광DF33단층지면탐측급주장공정화련당리정전매탄감탐중진행료시험병성공응용。구유일정적추엄응용개치。
Along with the development of small diameter geological exploration and under the influence of formation condi-tions, hole accidents and hole inclination requirements, more directional drilling construction is needed.In small diameter borehole, the MWD instrument can not be put down through drill pipe of 50 or 60mm in diameter.By technical research, field tests and the improvement, a set of small diameter waterproof cable joint was developed, which solved the key techni-cal difficulty of controlled directional drilling.The concrete steps are as following: separate the measuring probe tube and the transmission cable;connecting directional measuring probe tube and the drill pipe in advance, then put it to the prede-termined depth together;through the drill pipe, the top and lower joints being connected in drilling fluid to realize electrical connection and signal transmission to complete the directional operation.This method was tested in ground detection and grouting project in a coal mine of DF33 fault and coal exploration with successful application.