... was substituted in equation 1, and DR in equation 1 was solved for the data given in table 1. Note that all the other controllable variables are kept at constant values while MW was changed. drill pipe drilling operation rpm equation 1 rotary speed strength maximum value circulation rate bit...

... Abstract A novel deployment system for open hole logging tools has been developed that reduces the risk and cost of accessing high angle wells and wells with bad hole conditions. The tools are conveyed inside drill pipe where they are protected while running-in. Wireline tools are used...

.... Such a plugging fluid, designed to gel after being sheared through a bit, cures the losses without the need for extra drill pipe trips, drilling of cement plugs, or time spent waiting on cement. The quick rate of cure allows operators to resume drilling with minimum downtime, usually within 30 minutes...