Invention Grant
- Patent Title: Wellbore tong
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Application No.: US16032310Application Date: 2018-07-11
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Publication No.: US10760359B2Publication Date: 2020-09-01
- Inventor: Ditmar Clasen , Martin Helms , Bjoern Thiemann
- Applicant: Weatherford Technology Holdings, LLC
- Applicant Address: US TX Houston
- Assignee: Weatherford Technology Holdings, LLC
- Current Assignee: Weatherford Technology Holdings, LLC
- Current Assignee Address: US TX Houston
- Agency: Patterson + Sheridan, LLP
- Main IPC: E21B19/16
- IPC: E21B19/16 ; E21B19/10

Abstract:
A tong includes a gear ring powered by a motor assembly, the gear ring having a plurality of ramps formed on an inner surface thereof and a brake plate rotationally independent of the gear ring, the brake plate having a gripping assembly for interacting with the ramps to grip a tubular. Also included is a brake assembly for preventing rotation of the brake plate, the brake assembly including an adjustable brake band for applying friction to the brake plate and at least one brake pad made of braking material disposed on an outer surface thereof in the area of contact with the brake band for reducing friction between the brake plate and the brake band. In one embodiment, the braking material is bronze.
Public/Granted literature
- US20200018129A1 WELLBORE TONG Public/Granted day:2020-01-16
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