径向水力喷射钻井技术在煤矿注浆孔中的应用

Application of Radial Hydraulic Jet Drilling Technology in Grouting Holes of Coal Mine

摘要:

采用石油行业径向水平喷射钻井技术在煤矿注浆堵水方面可实现水平定向射流成孔，在薄层灰岩、奥陶系灰岩承压含水层中寻找沟通裂隙，尤其在直井或分支井段较小漏水的情况下可进行多分支喷射，还可以加适量盐酸、酸化缓蚀剂进行局部酸化沟通裂隙，压裂地层，从而降低注浆压力，提高注浆堵水效果。径向水力喷射钻井在峰峰集团梧桐庄矿9号注浆孔应用取得了一定的成效。该技术也可作为地热井增大水量的一种手段。

Abstract:

By the radial horizontal jet drilling technology applied in oil industry, horizontal directional jet hole can be realized for water block grouting in coalmine. This technology can also be used in looking for the linked fractures in thin limestone and Ordovician limestone confined aquifer, especially in multi-branch injection in vertical well and multilateral well with slight leakage; what is more, with this technology adding appropriate amount of hydrochloric acid and acid corrosion inhibitor for local acid to fracture formation in order to reduce the grouting pressure and improve grouting effect for water blocking. The radial hydraulic jet drilling technology was applied in 9# grouting hole of Wutongzhuang mine of Fengfeng Group with some effects, which can be a means of increasing the water amount of geothermal well.