According to the financial news on June 4, 2024, according to the intellectual property information of Tianyancha, China Sinopec Petroleum Machinery Co., Ltd. has obtained a patent called "A Tie Rod Locking Bearing", with the authorization announcement number CN221074102U and the application date of October 2023.

The patent relates to the field of drilling tool technology, in particular, a tie rod locking bearing. The tie rod locking bearing includes a cone, a tooth palm and a tie rod. Among them, the cone is penetrated by the inner hole of the cone, including the first cone inner hole and the second cone inner hole, and a locking section is provided between the two holes; the tooth palm includes a journal section and a limit section, the journal section is located in the inner hole of the second cone, and the inner hole of the tooth palm is penetrated by the inner hole of the tooth palm, which is coaxially arranged with the inner hole of the cone; the tie rod is penetrated in the inner hole of the tooth palm and the inner hole of the cone, and is connected to the tooth palm by adjusting the fixing piece, and the locking section is limited between the tie rod and the tooth palm. This patent solves the problem of wear between steel balls and steel ball tracks under high drilling pressure in related technologies, which causes large axial movement in the steel ball locking structure and large gear swing, further aggravating the wear problem between steel balls and steel ball tracks.