A special device that, when fitted into the rotary table, transmits torque to the kelly and simultaneously permits vertical movement of the kelly to make the hole is called a _________________.
A
master bushing
B
kelly slips
C
kelly bushing
D
rotary bushing
E
İlgili Sorular
Which buoy may be odd numbered?A doppler log in the bottom return mode indicates the __________.While being assisted by an icebreaker on Lake Superior, you receive a single letter code instructing...BOTH INTERNATIONAL & INLAND Which statement is TRUE concerning the danger signal?On small passenger vessels, which material must not be used§in a valve or fitting for a hull penetra...