6Maddox S D. An emergency escape system for an elevated workplace [ J ]. SPE 27258:441 - 451.
7Maddox S D. Hydraulic Workover Techniques : Their Versatility and Applications[ R]. SPE 27605 : 115 - 124.
8R. B. Leggett Snubbing Unit Applications in Potentially High - Rate Gas Wells: A Case Study of the Anschutz Ranch East Unit, Summit County, Utah [ J ]. SPE 22824, 1991:59 - 74.
9Kevin Schmige, Larry MacPherson. Snubbing Provides Options for Broader Application of Underbalanced Drilling Lessons[ J]. SPE 81069,2003 : 1 - 7.
10Moak R. Hydraulic Rigs Allow for Live Well Workover [J]. Petroleum Engineer International. 1982 (4) :67 - 72.