KELLY

E-MAIL: irislea@sj-drilling.com;irislea@163.com

         The kelly is the polygonal tubing which is turned by kelly bushing when rotated by the rotary table.  The upper end of the kelly is screwed into the swivel, using a left-hand thread to preclude loosening from the right-hand torque applied below.

HEILONGJIANG NORTH SHUANGJIA DRILLING TOOLS CO., LTD.

Iris lea

Sales Manager

International Marketing Dept.

Add: No.56, Xingye Road, Yangming District，Mudanjiang City, Heilongjiang P.R, China       
E-mail:irislea@163.com；irislea@sj-drilling.com
Website: http://www.sj-drilling.com

Skype:irislea-sj-drilling

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