A Rathole is a temporary storage space that is 30 to 35 feet deep, lined with casing that projects above the floor, and used to store the kelly and swivel. This is either done by the portable rig that drills the conductor hole or can be done by the primary rig after rigging-up.
[pdf] 
Break Circulation - To establish circulation of drilling fluids after a period of static conditions. Circulation may resume after a short break, such as taking a survey or making a mousehole connection, or after a prolonged interruption, such as after a round trip..
Break Circulation - To establish circulation of drilling fluids after a period of static conditions. Circulation may resume after a short break, such as taking a survey or making a mousehole connection, or after a prolonged interruption, such as after a round trip..
Hydrostatic pressure in drilling refers to the pressure exerted by a column of drilling mud or fluid within a wellbore. It is an essential factor in drilling operations as it balances the formation pressure and prevents well blowouts..
The load exerted on the BOP handling system by the static weight of the BOP stack. Source: API SPECIFICATION 7K, Drilling and Well Servicing Equipment, Sixth Edition, December 2015. Global Standards..
When the well is in a static condition, the bottomhole pressure is equal to the hydrostatic pressure. When the well is circulating, the bottomhole pressure increases due to the applied surface pressure needed to overcome friction pressures in the piping..
It means that the fast line tension will increase under a dynamic condition; however, the dead line tension will remain the same because it is still in static condition.
[pdf] The top drive is one of the components of the drilling rig that is used to rotate the drill string during drilling, having 1000 horsepower, which rotates the shaft to which the drill string is attached. It decreases t.
[pdf] 
