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Erstellt / Aktualisiert 07.01.2021 / 07.01.2021
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Fenster schliessen

Typical (rotary) drill rig components

Lizenzierung: Keine Angabe
Drill bit (plus tools)is connected to a cable
Fenster schliessen

Typical (rotary) drill rig components

Mast
Fenster schliessen

Typical (rotary) drill rig components

 

Mast

Top drive or rotary table

Drill pipe/ rod

Drill bit

Mud /water pump

Mud pit (mud tank)

Fenster schliessen

Dry drilling techniques

Bucket augers

Solid stem continuous augers

Hollow stem continuous augers

Cable tool drilling

Air rotary drilling

Fenster schliessen

Wet drilling techniques

Rotary drilling usually with plain water or a bentonite-water slurry

-- forward circulation

-- reverse circulation

(jetting or wash boring)

Fenster schliessen

Flushing fluids-- types and purposes

Air

Water

Bentonite-water slurry

Polymers

Chemically-based foams

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Purposes of the flusching fluid /used additives

Transport rock cuttings out of the borehole

Cool the bit and tools

Lubricate the bit

Control mud density/ viscosity

Form a 'mudcake' (i.e. borehole wall sealing)

Reduce friction of drilling string

Reduce corrosion of equipment,...