公开(公告)号：US12049792B2

公开(公告)日：2024-07-30

申请号：US17618008

申请日：2020-06-10

申请人： SINOPEC PETROLEUM ENGINEERING TECHNOLOGY SERVICE CO., LTD ,  SINOPEC SHENGLI PETROLEUM ENGINEERING CO., LTD ,  DRILLING TECHNOLOGY RESEARCH INSTITUTE OF SINOPEC SHENGLI PETROLEUM ENGINEERING CO., LTD

发明人： Huangang Zhu ,  Jiancheng Li ,  Haoyu Sun ,  Qiang Cao ,  Yong Chen ,  Dejing Yang ,  Zongqing Li ,  Chang Wang ,  Rongrong Song ,  Ping Xu

IPC分类号： E21B17/18 ,  E21B21/14 ,  E21B33/03 ,  E21B33/068

CPC分类号： E21B17/18 ,  E21B21/14 ,  E21B33/03 ,  E21B33/068

摘要： A double-channel fluid injection apparatus includes a main shaft, a bearing box, and a sealing box. The main shaft includes an outer tube and an inner tube. An internal channel of the inner tube and a vertical through channel constitute a first fluid passageway. The inner tube and the outer tube form an annular gap, and a channel D is radially formed at a lower part of the outer tube and is in communication with the annular gap, thus constituting a second fluid passageway. The bearing box is mounted on a boss of the outer tube. The sealing box includes a sealing cylinder fixedly connected to a lower end of a lower end cap of the bearing box. A channel E in communication with the second fluid passageway is radially formed at a position of the sealing cylinder corresponding to the channel of the outer tube.