- published: 22 Jul 2013
- views: 19646
In geotechnical engineering, drilling fluid is a fluid used to aid the drilling of boreholes into the earth. Often used while drilling oil and natural gas wells and on exploration drilling rigs, drilling fluids are also used for much simpler boreholes, such as water wells. Liquid drilling fluid is often called drilling mud. The three main categories of drilling fluids are water-based muds (which can be dispersed and non-dispersed), non-aqueous muds, usually called oil-based mud, and gaseous drilling fluid, in which a wide range of gases can be used.
The main functions of drilling fluids include providing hydrostatic pressure to prevent formation fluids from entering into the well bore, keeping the drill bit cool and clean during drilling, carrying out drill cuttings, and suspending the drill cuttings while drilling is paused and when the drilling assembly is brought in and out of the hole. The drilling fluid used for a particular job is selected to avoid formation damage and to limit corrosion.
An empty night, an empty voice
I’ve seen the scenery for so long
I’ve made my bed, I’ve made my choice
There’s nothing left for me
I’m in a tunnel
And I know there is a light
At the end
But I can’t see it
(CHORUS)
I am floating on a cloud in the sky
And I am inside
Warm but not like lying in the sunlight
And I am inside
I’m tired
I'm tired
I loved you once, I don’t know why
Everything never is quite enough
It may have been blind, but it was mine
Is there a thing as true love
Dear belladonna come
Take me home back to sleep
Don’t bring me down
The milk sugar’s sweet
(CHORUS)
I am floating on a cloud in the sky
And I am inside
Warm but not like lying in the sunlight
And I am inside
I’m tired
I'm tired
I'm tired
I'm tired
(CHORUS)
I am floating on a cloud in the sky
And I am inside
Warm but not like lying in the sunlight
And I am inside
I’m tired
I'm tired
I'm tired
I'm tired