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A platform for research: civil engineering, architecture and urbanism
Precipitation well completion construction method
The invention relates to a precipitation well completion construction method. The excavation position of a to-be-drilled well hole is determined; a drill bit of a spiral drilling tool of the drilling machine is drilled downwards to a preset depth from the excavation position to form a well hole; the spiral drilling tool is lifted upwards, so that a drill bit is lifted upwards to a preset position; slurry is injected into the well hole to protect the wall, when the highest liquid level in the central pipe of the spiral drilling tool is flush with or higher than the wellhead of the well hole, the spiral drilling tool is lifted upwards so that the drill bit can be lifted out of the wellhead, and the lifting speed of the spiral drilling tool is matched with the injection speed of the slurry; a prefabricated well pipe is sunk into the well hole injected with the slurry, wherein a gap is formed between the outer wall of the prefabricated well pipe and the inner wall of the well hole; on the basis, grouting is conducted while the spiral drilling tool is lifted upwards, the lifting speed of the drill bit is matched with the grouting speed, therefore, hole collapse and hole shrinkage can be prevented from being generated on the inner wall of a well hole, meanwhile, the amount of generated mud is small, and economical and environment-friendly effects are achieved.
本公开涉及一种降水井成井施工方法，确定待钻井孔的开挖位置；将钻机的螺旋钻具的钻头自开挖位置处向下钻进至预设深度以形成井孔；向上提升螺旋钻具，以将钻头向上提升至预设位置；向井孔内注入泥浆护壁，当螺旋钻具中心管内的最高液面与井孔井口平齐或高于井孔井口时，向上提升螺旋钻具，以将钻头提升至井口外，螺旋钻具的提升速度与泥浆的注入速度相匹配；向注入泥浆的井孔内下沉预制井管，预制井管的外壁与井孔的内壁之间具有间隙；向间隙内布置填充层，基于此，边向上提升螺旋钻具边注浆，且钻头的提升速度和注浆速度相匹配，从而可以防止井孔内壁产生塌孔、缩孔，同时，泥浆产生量小，经济环保。
Precipitation well completion construction method
The invention relates to a precipitation well completion construction method. The excavation position of a to-be-drilled well hole is determined; a drill bit of a spiral drilling tool of the drilling machine is drilled downwards to a preset depth from the excavation position to form a well hole; the spiral drilling tool is lifted upwards, so that a drill bit is lifted upwards to a preset position; slurry is injected into the well hole to protect the wall, when the highest liquid level in the central pipe of the spiral drilling tool is flush with or higher than the wellhead of the well hole, the spiral drilling tool is lifted upwards so that the drill bit can be lifted out of the wellhead, and the lifting speed of the spiral drilling tool is matched with the injection speed of the slurry; a prefabricated well pipe is sunk into the well hole injected with the slurry, wherein a gap is formed between the outer wall of the prefabricated well pipe and the inner wall of the well hole; on the basis, grouting is conducted while the spiral drilling tool is lifted upwards, the lifting speed of the drill bit is matched with the grouting speed, therefore, hole collapse and hole shrinkage can be prevented from being generated on the inner wall of a well hole, meanwhile, the amount of generated mud is small, and economical and environment-friendly effects are achieved.
本公开涉及一种降水井成井施工方法，确定待钻井孔的开挖位置；将钻机的螺旋钻具的钻头自开挖位置处向下钻进至预设深度以形成井孔；向上提升螺旋钻具，以将钻头向上提升至预设位置；向井孔内注入泥浆护壁，当螺旋钻具中心管内的最高液面与井孔井口平齐或高于井孔井口时，向上提升螺旋钻具，以将钻头提升至井口外，螺旋钻具的提升速度与泥浆的注入速度相匹配；向注入泥浆的井孔内下沉预制井管，预制井管的外壁与井孔的内壁之间具有间隙；向间隙内布置填充层，基于此，边向上提升螺旋钻具边注浆，且钻头的提升速度和注浆速度相匹配，从而可以防止井孔内壁产生塌孔、缩孔，同时，泥浆产生量小，经济环保。
Precipitation well completion construction method
降水井成井施工方法
XIONG XIANGQIAN (author) / LIU JIANXUE (author) / SU HANG (author) / ZHANG LILI (author) / XIONG XIN (author) / WEN DENG (author) / YANG JIAMING (author) / YANG XUESHUAI (author) / XIONG ZONGXI (author)
2022-01-28
Patent
Electronic Resource
Chinese
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