The utility model relates to a downhole sand control filling and releasing tool, which comprises an upper joint and a lower joint, the upper outer circumference of the upper joint is provided with an upper joint convex ring, the lower part of the upper joint convex ring is provided with a lower butt joint, the lower end of the lower butt joint is screwed with the upper end of the lower joint, the middle part of the upper joint is embedded with a radial sliding lock block, and the outer edge of the lock block is embedded in the inner wall of the lower butt joint The lower end of the upper joint extends downward to the inner cavity of the lower joint and the gap between the two is matched; the inner cavity of the upper joint is inserted with a piston, the circumference of the upper joint is screwed with a shear pin, and the inner end of the shear pin is respectively embedded in the groove of the outer wall of the piston, the upper end of the piston is provided with a bell shaped piston ball seat, the outer wall of the lower end of the piston is against the inner wall of the lock block, and the outer wall of the piston is higher than the part of the lock block There is a piston reducing section for the lock block to exit. The downhole sand control filling and releasing tool can send the sand control screen pipe to the bottom of the well for sand filling, and then release the sand control screen pipe to stay in the well, and reserve the butt joint connected with the packer.
【技术实现步骤摘要】
井下防砂充填丢手工具
本技术涉及一种防砂填砂系统,尤其涉及一种井下防砂充填丢手工具,属于采油设施
技术介绍
受油藏物性、生产、作业等综合因素影响,部分油井存在不同程度的出砂问题,主要分布在典型疏松砂岩油藏,与其他区块相比,出砂周期更短,出砂更严重,治理难度更大。出砂严重的油井以机械复合防砂为主,对于普通大套管井的防砂,在油管下部设防砂绕丝筛管,筛管上方通过安全接头连接有充填工具,砾石随水流从油管向下,经过充填工具的第一通道进入充填工具下方的环空,使筛管与套管之间的环空充满砾石,建立起人工挡砂井壁,阻止油层细砂流出;水流进入筛管,经过充填工具的第二通道进入充填工具上方的环空,从套管闸门向外返流。对于破损修复后的小套管井,由于通用充填工具的外径太大,尤其充填工具外周倒置的防砂皮碗封难以进入小套管,因此不能采用与大套管相同的充填管柱,也不能进行正循环充填工艺。必须将地填、井筒充填、坐封分步实施,因此需要设计小套管井专用的防砂充填丢手工具,该工具跟防砂筛管相连,丢手后将防砂筛管留井,再下封隔器与防砂筛管上方 ...
【技术保护点】
1.一种井下防砂充填丢手工具,包括上接头和下接头,其特征在于:所述上接头的上部外周设有上接头凸圈,所述上接头凸圈的下方套装有下对接接头,所述下对接接头的下端与所述下接头的上端相旋接,所述上接头的中段嵌装有可径向滑动的锁块,所述锁块的外缘嵌于所述下对接接头的内壁中,所述上接头的下端向下延伸至所述下接头的内腔且两者间隙配合;所述上接头的内腔插接有活塞,所述上接头的圆周上旋接有剪钉,所述剪钉的内端头分别嵌入活塞外壁的嵌槽中,所述活塞的上端口设有喇叭口状的活塞球座,所述活塞的下端外壁抵靠在所述锁块的内壁,所述活塞的外壁高于锁块的部位设有供锁块退出的活塞缩径段;所述上接头的下端旋接有 ...
【技术特征摘要】
1.一种井下防砂充填丢手工具,包括上接头和下接头,其特征在于:所述上接头的上部外周设有上接头凸圈,所述上接头凸圈的下方套装有下对接接头,所述下对接接头的下端与所述下接头的上端相旋接,所述上接头的中段嵌装有可径向滑动的锁块,所述锁块的外缘嵌于所述下对接接头的内壁中,所述上接头的下端向下延伸至所述下接头的内腔且两者间隙配合;所述上接头的内腔插接有活塞,所述上接头的圆周上旋接有剪钉,所述剪钉的内端头分别嵌入活塞外壁的嵌槽中,所述活塞的上端口设有喇叭口状的活塞球座,所述活塞的下端外壁抵靠在所述锁块的内壁,所述活塞的外壁高于锁块的部位设有...
【专利技术属性】
技术研发人员:康玉阳,李凡磊,李兴,任向阳,周兴波,王威,潘国辉,吴金红,
申请(专利权)人:中国石油化工股份有限公司,中国石油化工股份有限公司江苏油田分公司,
类型:新型
国别省市:江苏;32
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