The invention discloses a one-way valve opening control mechanism of a pressure-retaining rope coring drill tool, which comprises a spearhead, a cartridge clamp assembly, a cartridge chuck, a cross bar, a pull rod, a cam, a cartridge clamp bracket, a one-way valve and a mandrel; a fishing lance head is connected with a cartridge chuck bracket; a cartridge clamp assembly is pinned in a cartridge chuck bracket; a horizontal bar is arranged at the lower part of the cartridge chuck, and the upper part of the pull rod is The lower part is articulated with the cam, the cam is articulated with the elastic clamp bracket, and the lower end of the cam is provided with a strong magnetic block; the lower end of the elastic clamp bracket is connected with the end of the core shaft; the one-way valve hole is located at the top of the core shaft along the axial direction of the core shaft, and is connected with the central hole of the core shaft, and the one-way valve hole is positioned directly below the cam; the one-way valve core is provided in the one-way valve hole, and the upper part of the one-way valve core is provided with While realizing the pressure-retaining function of the drilling tool, the invention can reduce the risk of recovery failure caused by sticking accident due to the failure of the cartridge to retract normally in the process of salvaging the inner pipe, and meet the requirements of high-efficiency drilling.
【技术实现步骤摘要】
一种保压绳索取心钻具的单向阀开启控制机构
本专利技术涉及一种钻探用绳索取心钻具,尤其是涉及一种保压绳索绳索取心钻具的单向阀开启控制机构。
技术介绍
深海天然气水合物开发与利用已经成为世界各国未来资源战略的一个新热点。钻探取心是获取天然气水合物样品的最直接的方法。由于天然气水合物形成和存在低温高压环境下,国内外主要采用保压取样技术开展天然气水合物的取样工作。目前现有的小口径保压绳索取心钻具主要是针对海底钻机取样工况。目前,在已经公开的绳索取心保压取心钻具方案中其钻具下端部的密封与开启是通过保压帽配合海底钻机本体上的保压帽拧卸装置实现。钻进开始前借助钻机上的机械手及保压帽拧卸装置将内管总成下端部的保压帽拧开并置于钻机上实现下端部敞开,钻进结束后将内管总成提至钻机本体上再利用保压帽拧卸装置将保压帽拧至内管总成的下端部实现下端部的密封。钻具上端部的密封与开启主要是通过置于弹卡支架上的拨勾和单向阀芯相互配合实现。当正常工作的过程中,收卡筒上移一定距离,收卡筒利用其内壁尺寸对拨勾产生约束力迫使转动一定角度,导致拨勾与单向阀芯相接触使的单向阀芯能够克服弹簧力处于开启状态,当钻进 ...
【技术保护点】
1.一种保压绳索绳索取心钻具的单向阀开启控制机构,包括捞矛头、弹卡组件、收卡筒、横杆、提拉杆、弹卡支架、强力磁块、单向阀芯、强力磁环、单向阀盖、芯轴;捞矛头与收卡筒连接;弹卡组件销接于弹卡支架内;收卡筒与弹卡组件销接;芯轴的上部设置有单向阀盖;弹卡支架下部与芯轴连接;其特征在于:收卡筒的下部设置有横杆,提拉杆的上部挂置在横杆上,提拉杆的下端与凸轮铰接,凸轮铰接在弹卡支架上,凸轮的下端设置有强力磁块,提拉杆与凸轮铰接副、凸轮与弹卡支架的铰接副及强力磁块之间的连线呈三角形;芯轴上端与弹卡支架下端连接,单向阀孔沿芯轴轴向方向设置在芯轴顶部,与芯轴的中心孔连通,单向阀孔位于凸轮正下 ...
【技术特征摘要】
1.一种保压绳索绳索取心钻具的单向阀开启控制机构,包括捞矛头、弹卡组件、收卡筒、横杆、提拉杆、弹卡支架、强力磁块、单向阀芯、强力磁环、单向阀盖、芯轴;捞矛头与收卡筒连接;弹卡组件销接于弹卡支架内;收卡筒与弹卡组件销接;芯轴的上部设置有单向阀盖;弹卡支架下部与芯轴连接;其特征在于:收卡筒的下部设置有横杆,提拉杆的上部挂置在横杆上,提拉杆的下端与凸轮铰接,凸轮铰接在弹卡支架上,凸轮的下端设置有强力磁块,提拉杆与凸轮铰接副、凸轮与弹卡支架的铰接副及强力磁块之间的连线呈三角形;芯轴上端与弹卡支架下端连接,单向阀孔沿芯轴轴向方向设置在芯轴顶部,与芯轴的中心孔连通,单向阀孔位于凸轮...
【专利技术属性】
技术研发人员:王佳亮,万步炎,黄筱军,
申请(专利权)人:湖南科技大学,
类型:发明
国别省市:湖南,43
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