公开(公告)号：US09745806B2

公开(公告)日：2017-08-29

申请号：US14891456

申请日：2014-04-09

Applicant: SANDVIK INTELLECTUAL PROPERTY AB

Inventor： Johan Jelgert ,  Lars-Erik Larsson ,  Krister B Eriksson ,  Ola Fredin

IPC: E21B19/16 ,  E21B7/02 ,  E21B19/20

CPC classification number: E21B19/161 ,  E21B7/02 ,  E21B19/164 ,  E21B19/168 ,  E21B19/20

Abstract: A drill rod gripping apparatus to grip and impart rotational motion to a drill rod including a sled axially mounted at a frame and having first and second jaws moveably mounted at the sled to allow a substantially linear lateral movement across the sled to and from one another. A plurality of rod engagers are mounted at each jaw with at least one of the engagers including an abrasive surface formed from a coating to increase the frictional force between the drill rod and the gripping apparatus.