The utility model provides a repeated open and close loop valve, including an upper joint, a shell body, a lower joint and an anti drop device. A jet nozzle is arranged on the upper joint, the jet nozzle is connected with the central channel of the upper joint, the jet nozzle and the axis of the circulation valve can be arbitrary angles, and the upper end of the upper joint and the upper end and the shell body are set up. Fixed connection, the joint of the shell body setting, the lower joint and the outer shell can be moved in an axial direction, but the circumference can not be rotated, the lower joint is connected with the anti drop device, the lower end of the lower joint is set up with the lower thread and the upper end, and the center passage is connected with the tool outlet through the flow passage, with the lower joint and the upper joint. The axial reciprocating motion between the central and the jet nozzles is switched between connected and truncated. By adopting the above structure, it has the following beneficial effects: the ejection force of the reverse injection will be pulled by Guan Zhu Mukai during the down process, and the reverse injection is beneficial to the movement of the solid, and the switching between the forward and reverse jet modes is simpler and faster, without the need to stop the pump or increase the displacement.
【技术实现步骤摘要】
一种重复启闭循环阀
本技术属于石油机械
,具体涉及一种重复启闭循环阀。
技术介绍
众所周知,岩屑移运和砂石移运是钻井的一个重要难题,在钻井过程中,如果岩屑移运效果达不到要求,会导致诸多问题发生,引起高摩阻和高扭矩,沉砂卡钻,下套管与固井困难,钻具磨损严重,测井仪器下入困难;在冲砂洗井过程中,砂石移运效果达不到要求,就会导致井筒内砂石清洗不干净,严重时造成砂卡;在磨铣桥塞过程中,桥塞碎屑难以移运,往往在钻3个桥塞后短起,循环刮胶,影响磨铣桥塞效率。为解决岩屑和砂石的移运问题,其中BJ公司和NOV公司做了大量研究,BJ公司研制的Tornado循环阀,主要应用在清砂洗井领域,工作原理为:下入过程中的高压旋流液体冲击、流化砂石,随后,增加循环排量,工具转换成逆向喷射,然后在起出工具时利用动力液反冲作用返出携砂液;NOV公司研制的MOCS循环阀,主要应用在钻井领域,工作原理是:休眠状态时,内滑套处于“上”位,投球激活后,内滑套在液压力作用下移动到“下”位,旁通阀开启,如需关闭,通过地面停泵,内滑套在弹簧力作用下复位至“上”位,开泵,内滑套在液压力作用下移动至“中”位, ...
【技术保护点】
一种重复启闭循环阀,包括上接头(1)、外壳体(2)、下接头(3)和防掉装置(4),其特征在于:上接头(1)上设置有射流喷嘴(5),射流喷嘴(5)与上接头(1)的中心流道(101)连通,射流喷嘴(5)和循环阀轴线可以成任意角度,上接头(1)上端设置上螺纹(102)、下端与外壳体(2)固定连接,外壳体(2)内设置下接头(3),下接头(3)和外壳体(2)之间可以轴向往复移动,但周向不能旋转,下接头(3)与防掉装置(4)固定连接,下接头(3)下端设置下螺纹(302)、上端设截流阀(301),中心流道(101)经过流流道(303)与工具出口连通,随着下接头(3)和上接头(1)之间的轴 ...
【技术特征摘要】
1.一种重复启闭循环阀,包括上接头(1)、外壳体(2)、下接头(3)和防掉装置(4),其特征在于:上接头(1)上设置有射流喷嘴(5),射流喷嘴(5)与上接头(1)的中心流道(101)连通,射流喷嘴(5)和循环阀轴线可以成任意角度,上接头(1)上端设置上螺纹(102)、下端与外壳体(2)固定连接,外壳体(2)内设置下接头(3),下接头...
还没有人留言评论。发表了对其他浏览者有用的留言会获得科技券。