Drill collar – Drilling Equipment – Readyzone

Drill collar Drill collars are used to provide weight on bit and to keep drill pipe in tension. Drill pipe has a comparatively low stiffness, which makes it susceptible to bucking when under compression. Repeated bucking will eventually lead to drill pipe failure. Since elastic members can only buckle in compression, fatigue failure of drill pipe can be eliminated by…

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Auxiliary brake ( drilling rig ) – Readyzone

Auxiliary brake During tripping-out operations, the drill pipe is removed in stands ( ̴93 ft, depending on size of derrick etc. ) ion such a way that the pipe is decelerated during the last 5-10 ft before being arrested in the rotary table with the slips. Thus, during tripping out operations, the main brakes are not required to absorb excessive…

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