摘要
地质钻探施工时起下钻更换钻头,需要占用大量时间,且存在一定的安全隐患,大大影响钻探效率,采用不提钻换钻头钻进技术可以很好地解决这个问题。以S95绳索取心钻杆为使用平台,沿用BH-75钻具基本结构,并针对其存在问题,研制BH-95规格的不提钻换钻头钻具,同时根据BH-95规格钻具的具体结构完善BH-75钻具,提高了BH系列钻具的承压能力和钻具收敛(投送)稳定性,增设了自动除沙机构等。将该技术在江西省宜春市桃地1井(地热井)进行了现场应用,在孔深680.65~704.25 m进行了不提钻换钻头,钻具到位张开成功率100%,岩心采取率达到99.4%,岩心质量好,最大限度减少了起下钻次数,有效预防了起下钻引发的孔内事故。不提钻换钻头钻进技术为深孔地质勘探中钻进强研磨性、“打滑”、软硬频繁交替等地层,提供了及时优化钻头使用方案,降低能源消耗,有效地保护孔壁安全和减轻劳动强度。
It takes a lot of time to go out to change the bit in geological drilling construction,and there are certain safety risks,which greatly affects the drilling efficiency.Using the drilling technology of replacing the bit without lifting the rod can solve this problem well.Using the 95 specification wireline coring drill pipe as the platform,the basic structure of BH-75 drill pipe was used,and in view of the existing problems,the BH-95 specification drill pipe without lifting drill bit change was developed.At the same time,the BH-75 drill pipe was improved according to the specific structure of the 95 specification drill pipe,so as to improve the bearing capacity and convergence(delivery)stability of the drill pipe,and automatic sand removal mechanism was added.The technology was applied in the Taodi 1 well(geothermal well)in Yichun City,Jiangxi Province.The drill bit was changed without lifting drill at the hole depth of 680.65~704.25 meters.The success rate of drilling tool in place was 100%,the core recovery rate reached 99.4%,the core quality was good,and the tripping times were reduced to a minimum,effectively preventing the hole accidents caused by tripping.The drilling technology without lifting drill Bit Change provides timely optimization of drill bit usage plans,reducing energy consumption,effectively protecting hole wall safety,and reducing labor intensity for drilling in formations with strong abrasiveness,slipping,and frequent alternation of soft and hard in deep hole geological exploration.
作者
钱锋
胡立
邓梦春
罗显粱
张统得
QIAN Feng;HU Li;DENG Mengchun;LUO Xianliang;ZHANG Tongde(Institute of Exploration Technology,CAGS,Chengdu Sichuan 611734,China)
出处
《钻探工程》
2023年第S01期380-384,共5页
Drilling Engineering
基金
中国地质调查局地质调查项目“西部地区战略性矿产快速查证与技术支撑”(编号:DD20230320)
国家重点研发计划“深地资源勘查开采”重点专项“5000米智能地质钻探技术装备研发及应用示范”(编号:2018YFC0603404)。
关键词
地质钻探
不提钻换钻头
BH系列钻具
绳索取心钻杆
geological drilling
replacing drill bit without lifting the rod
BH series drilling tools
wireline coring drill pipe
