深大口径钻孔井底落物打捞器具的研制创新

Development and Innovation of Deep and Large Diameter Drilling Well Bottom Falling Object Salvage Appliance

深大口径钻孔目前施工领域主要用于煤矿地面下井瓦斯抽放、应急通道和排水工程,尤以地面下井瓦斯抽放钻孔较多。一般钻孔直径在Φ800～1000mm,深度在600m左右,安装Φ630～800×18mm的钢管,是连接地面和井下的通道。由于钻孔深大,地层复杂,组合式钻头磨损消耗异常,不时有牙轮掌、轮子、螺栓和加强铁块等掉落井底,造成无法钻进。由于工期紧,任务重,所以在施工中研制深大口径钻孔井底落物的新型打捞器具意义重大,有备无患,必不可少。

The construction field of deep and big diameter borehole is gas drainage of coal mine, emergency channel, and drainage engineering. The borehole diameter is general Ф800-1000mm, and the depth is about 600m. The Ф630-800×18mm steel pipe is stalled, and it is the connect channel of ground and underground. As the depth is big, stratum is complex, and the combined-type bit wear consumption is abnormal, and sometimes die palm, wheels, bolts and strengthening of iron drop at the bottom of a well, which caused the drilling can not be conducted. Due to the tight time limit and much task, the development of deep and big diameter borehole bottom falling obiect salvage appliance is significant and necessary.