Snubbing is a type of heavy
well intervention performed on
oil and gas wells. It involves running the BHA on a pipe string using a hydraulic workover rig. Unlike
wireline or
coiled tubing, the pipe is not spooled off a drum but made up and broken up while running in and pulling out, much like conventional
drill pipe. Due to the large rigup, it is only used for the most demanding of operations when lighter
intervention techniques do not offer the strength and durability. Unlike conventional
drilling and
completions operations, snubbing can be performed with the well still under pressure (not
killed). When done so, it is called hydraulic workover. It can also be performed without having to remove the
Xmas tree from the
wellhead.
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UMILIANDO. FERMANDO
(p. pr. & vb. n.)
of Snub