CN204703814U - 一体式井口管柱悬挂机构 - Google Patents
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Abstract
一种一体式井口管柱悬挂机构，包括上管柱和下管柱。所述上管柱的下端设置有筒状的夹持套，所述下管柱顶端安装在夹持套内。所述夹持套上下分别套装有两个夹持驱动环，夹持驱动环内壁都与夹持套外壁接触，夹持驱动环与夹持套之间接触面至少有一个为楔形面，两个夹持驱动环通过连接机构连接。一体式井口管柱悬挂机构通过设置在上管柱下端的夹持套夹紧下管柱，结构简单且紧凑，体积小，零件数量少，操作维护便捷，维修保养成本低，可应用在作业空间有限的海洋石油平台的勘探井、生产井及自升式平台上的干式和浮式平台湿式井口，应用范围较广。
Description
技术领域
本实用新型涉及油气领域，具体地说是一种一体式井口管柱悬挂机构。
背景技术
在油、气井生产作业中，常规的做法是对向井里下入的油管或套管，最外面的套管固定在地面，里面的套管分别坐入到套管头壳体、套管头四通、油管头四通的轴肩上或外层套管的套管悬挂器的轴肩上。
然而固井后，由于井下温度及压力的变化会使油管或套管轴向尺寸伸长,井口管柱会产生向上的推力，同时井下管柱环空或管内压力波动也会使井口管柱产生向上的推力，容易造成井口管柱悬挂器密封失效，而且悬挂器会因此无法完全座入设置与井口四通的轴肩上，使井口管柱和井口设备处于欠约束状态，产生较多方面的安全隐患。钻井过程中每下入一种规格的井口管柱，就要拆卸更换一种规格的防喷器，在更换防喷器过程中井口处于失控状态，增加了作业风险，同时频繁更换防喷器造成操作作业时间增加，因此作业成本高。传统的井口管柱悬挂机构的结构比较复杂，零件数量多，体积大，因此设备维护繁琐而复杂，费用高，而且无法应用与作业空间有限的海上平台，安装作业及维护的劳动强度大，作业时间长，安全风险高。
实用新型内容
本实用新型针对上述现有技术存在的不足，设计了一种一体式井口管柱悬挂机构。
本实用新型的一体式井口管柱悬挂机构，包括上管柱和下管柱。
所述上管柱的下端设置有筒状的夹持套，所述下管柱顶端安装在夹持套内。
所述夹持套上下分别套装有两个夹持驱动环，夹持驱动环内壁都与夹持套外壁接触，夹持驱动环与夹持套之间接触面至少有一个为楔形面，两个夹持驱动环通过连接机构连接。
优选的是，所述夹持套的上部外壁设置有限位槽，下部外壁设置为上宽下窄的楔形面。
优选的是，所述夹持套的上部外壁设置为上窄下宽的楔形面，下部外壁设置为上宽下窄的楔形面。
优选的是，所述的连接机构为螺栓或液压夹钳。
优选的是，所述的下管柱顶端与夹持套的接触面上设置有环状凸起。
优选的是，所述环状凸起表面上设置有密封凸缘，所述密封凸缘轴向设置有多个。
本实用新型的有益效果是：一体式井口管柱悬挂机构通过设置在上管柱下端的夹持套夹紧下管柱，结构简单且紧凑，体积小，零件数量少，操作维护便捷，维修保养成本低，可应用在作业空间有限的海洋石油平台的勘探井、生产井及自升式平台上的干式和浮式平台湿式井口，应用范围较广。
悬挂管柱的同时还起到了密封效果，解决了传统悬挂方式容易出现的密封失效问题，避免了生产作业的安全隐患，无须每下入一种规格的井口管柱就要拆卸更换一种规格的防喷器，避免了井口处于失控状态，减少了由此带来的作业时间及作业成本，保证作业安全。
下管柱与夹持套之间设置的环状凸起，使两者的接触更加紧密，环状凸起上设置的密封凸缘使接触面更加粗糙，提高摩擦力，增加夹持效果，同时密封凸缘还起到了密封圈的效果，进一步提高了密封性能。
管柱悬挂采用无固定轴肩的悬挂结构，所以管柱悬挂位置可根据实际作业情况适当调整并夹紧。便于井口设备的安装作业，同时解决了由于井下地质条件的变化，使管柱结构尺寸变化而破坏井口安全作业的工作状态。
附图说明
附图1为一体式井口管柱悬挂机构实施例一的一侧的剖视图；
附图2为一体式井口管柱悬挂机构实施例二的一侧的剖视图。
具体实施方式
本实用新型的一体式井口管柱悬挂机构，如图1至2所示，包括上管柱1和下管柱2，下管柱2为需要进行悬挂的管柱。
上管柱1的下端设置有筒状的夹持套3，下管柱2顶端安装在夹持套3内。
夹持套3上下分别套装有两个夹持驱动环4，夹持驱动环4内壁都与夹持套3外壁接触，夹持驱动环4与夹持套3之间的接触面至少有一个为楔形面。两个夹持驱动环4通过螺栓5、液压夹钳等可实现连接和紧固的连接机构连接，使两个夹持驱动环4相互靠近时，使夹持驱动环4通过与其接触的楔形面挤压夹持套3，产生径向的夹紧力，使夹持套3向内夹紧下管柱2。
实施例一：
如图1所示，夹持套3的上部外壁设置有限位槽6，下部外壁设置为上宽下窄的楔形面。位于上方的第一夹持驱动环4被限位槽6固定在一个位置上，位于下方的第二夹持驱动环4通过螺栓逐渐扭紧而向第一夹持驱动环4靠近，第二夹持驱动环通过与夹持套3的楔形面接触，挤压夹持套3，通过轴向的移动产生径向的夹紧力，夹紧力通过夹持套3传递给下管柱2，使夹持套3抱紧下管柱2，实现下管柱的悬挂和密封。
实施例二：
如图2所示，夹持套3的上部外壁设置为上窄下宽的楔形面，下部外壁设置为上宽下窄的楔形面。位于上方的第一夹持驱动环4和位于下方的第二夹持驱动环4通过螺栓的逐渐扭紧而向中间相互靠近，由于两个夹持驱动环4都通过楔形面与夹持套3接触，两个夹持驱动环4轴向移动挤压夹持套3，产生径向的夹紧力，夹紧力通过夹持套3传递给下管柱2，使夹持套3抱紧下管柱2，完成下管柱的悬挂。
为增加夹紧力和密封效果，下管柱2顶端与夹持套3的接触面上设置有环状凸起，环状凸起表面上设置有密封凸缘，密封凸缘轴向设置有多个，使接触面更加粗糙，提高摩擦力，增加夹持效果，同时还起到了多层的密封圈效果，进一步提高密封性能。
Claims (6)
1.一种一体式井口管柱悬挂机构，其特征在于，包括上管柱(1)和下管柱(2)，
所述上管柱(1)的下端设置有筒状的夹持套(3)，所述下管柱(2)顶端安装在夹持套(3)内，
所述夹持套(3)上下分别套装有两个夹持驱动环(4)，夹持驱动环(4)内壁都与夹持套(3)外壁接触，夹持驱动环(4)与夹持套(3)之间的接触面至少有一个为楔形面，两个夹持驱动环(4)通过连接机构连接。
2.根据权利要求1所述的一体式井口管柱悬挂机构，其特征在于，所述夹持套(3)的上部外壁设置有限位槽(6)，下部外壁设置为上宽下窄的楔形面。
3.根据权利要求1所述的一体式井口管柱悬挂机构，其特征在于，所述夹持套(3)的上部外壁设置为上窄下宽的楔形面，下部外壁设置为上宽下窄的楔形面。
4.根据权利要求1所述的一体式井口管柱悬挂机构，其特征在于，所述的连接机构为螺栓(5)或液压夹钳。
5.根据权利要求1-4任一项所述的一体式井口管柱悬挂机构，其特征在于，所述的下管柱(2)顶端与夹持套(3)的接触面上设置有环状凸起。
6.根据权利要求5所述的一体式井口管柱悬挂机构，其特征在于，所述环状凸起表面上设置有密封凸缘，所述密封凸缘轴向设置有多个。
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| Publication number | Publication date |
|---|---|
| CN204703834U (zh) | 2015-10-14 |
| CN204703833U (zh) | 2015-10-14 |
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