砂卵石层旋冲挤密钻进机具研究与应用

详细信息

刊出日期: 2014-04-10

Research and Application of Rotary-percussion-extruding Drilling Equipment in Gravel with Sand Formation

Publish Date: 10 April 2014

摘要: 针对松散地层自稳能力差,因钻孔掉块、缩径等引起提钻遇卡的问题,设计了PDH-130型新型双向旋冲挤密钻具,利用浮动芯管改变活塞配气行程,实现正向冲击回转挤密钻进及提钻时的反冲击功能。根据现场试验情况,对双向冲击矛结构进行了改进,以满足砂土、砂卵石等复杂地层旋冲挤密钻进施工要求。
- 旋冲挤密钻进 /
- 双向冲击矛 /
- 复杂地层
Abstract: To deal with the poor self-stability of loose formation and drill tools sticking caused by block-falling and hole shrinkage, new PDH -130 bidirectional rotary-percussion-extruding mole is designed by using the floating core tube to change impact piston stroke and achieve the reverse impact function when normal rotary-percussion-extruding drilling and drill pipe lifting are conducted.On the basis of the field tests, improvement is made on the structure of PDH-130 bidirec-tional impact mole to meet the construction requirements of rotary-percussion-extruding drilling in sand, gravel and other complex formations.
- rotary-percussion-extruding drilling /
- bidirectional impact mole /
- complex formation