Patent Number: 9,970,288

Title: Receiving apparatus for downhole near-bit wireless transmission

Abstract: A receiving apparatus for downhole near-bit wireless transmission emission includes an electrical isolation drill collar and an internal electrical isolation short tube. The insulating subs are serially connected and disposed in the middle of the electrical isolation drill collar and the internal electrical isolation sub to realize electric isolation. The electrical isolation drill collar is electrically coupled with the internal electrical isolation short tube through a lantern stabilizer. The receiving apparatus further includes a wireless transmission receiving unit. The electrical isolation drill collar and the internal electrical isolation short tube of the receiving apparatus both have an electrical isolation function. The insulating subs in the electrical isolation drill collar and the internal electrical isolation short tube are non-detachable, and can meet downhole requirements for high torsion and high-pressure sealing property.

Inventors: Zheng; Jian (Beijing, CN), Di; Qingyun (Beijing, CN), Chen; Wenxuan (Beijing, CN), Sun; Yuntao (Beijing, CN), Zhang; Wenxiu (Beijing, CN), Yang; Yongyou (Beijing, CN)

Assignee: INSTITUTE OF GEOLOGY AND GEOPHYSICS, CHINESE ACADEMY OF SCIENCE

International Classification: E21B 47/12 (20120101); G01V 3/34 (20060101); E21B 47/16 (20060101); E21B 17/02 (20060101)

Expiration Date: 2022-05-15 0:00:00