Invention Grant
- Patent Title: Centring means in a rotary tong
- Patent Title (中): 定心装置在旋转钳中
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Application No.: US13382477Application Date: 2010-07-06
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Publication No.: US09410384B2Publication Date: 2016-08-09
- Inventor: Bernt Olav Holen
- Applicant: Bernt Olav Holen
- Applicant Address: NO Kristiansand
- Assignee: AKER MH AS
- Current Assignee: AKER MH AS
- Current Assignee Address: NO Kristiansand
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: NO20092553 20090706; NO20092554 20090706
- International Application: PCT/NO2010/000269 WO 20100706
- International Announcement: WO2011/005111 WO 20110113
- Main IPC: B25B17/00
- IPC: B25B17/00 ; E21B19/16 ; E21B19/24

Abstract:
The invention relates to a pipe clamping device comprising a housing which has a tubular center in which a pipe is to be positioned. The pipe clamping device comprises at least three gripping devices for synchronous movement in towards the pipe. Each gripping device is disposed with a direction of movement in towards the tubular center, where each gripping device is arranged in order, in contact with the pipe, to provide a holding force. The pipe clamping device is provided with elongate flexible transmission elements, each of the elongate flexible transmission elements being attached to one of the gripping devices and running in contact with at least one support means to attachment to each of the other gripping devices. Upon movement of at least one of the gripping device, this movement is transmitted to at least one of the other gripping device by the associated elongate transmission element. The invention also comprises a pipe clamping device in which there is used at least two gripping devices and a torque tong, of which the pipe clamping device is a part.
Public/Granted literature
- US20120111154A1 CENTRING MEANS IN A ROTARY TONG Public/Granted day:2012-05-10
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