摘要
全通径钻具内防喷器主要解决了其它钻具内防喷器不能实现全通径的弊病,它通过特殊的阀板结构设计,在钻具内流体压力作用下实现自动关闭,正压状况下水眼是完全打开的。研制的全通径钻具内防喷器能替代目前国内外常用的钻具内防喷工具,功能齐全,使用简便。全通径钻具内防喷器的最后通径为71.4mm,外径小于70mm的测斜仪器或其它入井仪器可以自由通过,可利于处理井下复杂和其它钻井辅助仪器的通过钻具水眼的下入,极大地节约了钻井成本。关闭压差可在适当范围内调节,性能可靠,抗腐蚀性强,提高了井控安全,形成了自主的知识产权,具有极大的现场推广价值。已获得发明和实用新型两项专利,形成了独有的技术。
Full-diameter inside blowout preventer has solved the defect what other inside blowout preventers can not achieve full inside-diameter through. It will be closed and opened automatically under the action of liquid pressure inside drilling string through special valve sheet structural design. The water hole in drilling string was fully opened under condition of fluid quiescence and direct circulation, the clinometer with less than 70mm outside diameter and other instrument could pass the drilling string, the drilling cost was saved. The shutoff differential pressure of the preventer could adjust, and the performance of the full-diameter inside blowout preventer was reliable, corrosion resistance was strong, and could improve well control safety. The unique technique has been obtained two patents.
出处
《钻采工艺》
CAS
北大核心
2011年第6期65-67,9,共3页
Drilling & Production Technology
关键词
全通径
钻具内
防喷器
井控
Full-diameter, inside blowout preventer, well control
