公开(公告)号：US20220243540A1

公开(公告)日：2022-08-04

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

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.

公开(公告)号：US20230147453A1

公开(公告)日：2023-05-11

申请号：US17913075

申请日：2020-09-30

申请人： CHINA PETROLEUM & CHEMICAL CORPORATION ,  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： Chuanwei ZHAO ,  Zhonghua WU ,  Yanjun ZHOU ,  Honglin TANG ,  Zhihe LIU ,  Xueliang PEI ,  Haoyu SUN ,  Zhenguo SU ,  Bo KANG ,  Hui ZHANG ,  Huangang ZHU ,  Yongming CHEN ,  Zhongshuai CHEN

IPC分类号： E21B33/128 ,  E21B21/12 ,  E21B21/16

CPC分类号： E21B33/128 ,  E21B21/12 ,  E21B21/16

摘要： A flow splitting device for gas reverse circulation drilling, including: an upper joint for connecting with a double-wall drill pipe; an inner tube which is arranged in the upper joint and defines a first passageway in communication with an inner chamber of the double-wall drill pipe, a second passageway in communication with an annular space in the double-wall drill pipe formed between the inner tube and the upper joint; a lower joint, having an upper end fixedly connected with the upper joint and a lower end for connecting with a drill tool; and a flow guiding member provided between the upper joint and the lower joint. A flexible sealing mechanism is provided outside the upper joint. The flexible sealing mechanism extends radially outward relative to the upper joint and the lower joint to form a sealing contact with a wellbore wall.