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6 FAQs about [Reverse down-the-hole drilling rig video collection]
What is reverse circulation drilling?
‘Reverse Circulation’ drilling involves the supply of air down through the drill-string to decrease the ‘effective density’ of the water in the center of the drill-string. Operating much like an ‘air-lift’, the drilling spoils are carried out of the hole through this rising column lower-density air/water mixture (see Figure).
What is a productive drill rig?
Productive drilling occurs when the majority of the time spent on-site is devoted to actually drilling. Many competitor drill rigs involve time draining activities such as: long rig-up times, difficult and time consuming pile placement, adding more and splicing piles.
What is a Berminghammer reverse circulation drill?
Reverse Circulation can be used in conjunction with rotary drilling bits as well as Down-the-Hole-Hammer applications. The Berminghammer Reverse Circulation Drills are particularly well suited to Down-the-Hole-Hammer applications due to their simple, rugged design and construction. Berminghammer Reverse Circulation Drill Models.
What is a rotary cut rig?
These rigs are primarily associated with drilling large diameter wells in unconsolidated material ranging from 24 inches to 50 inches in diameter and up to 1000 feet deep. The cutting actions used in the reverse circulation system include the rotary cut and the rotary crush actions. Shown here is in this video rotary cut.
What is RC drilling & how does it work?
The other common RC method is air-assisted reverse. This method runs a fairly small air line inside the drill pipe to lift the cuttings. It is very successful because you do away with pump priming problems. It works very well in limestone (and similar) formations that produce water.
Can a Berminghammer drill be used in a down-the-hole hammer?
Berminghammer drills can be used in almost every type of drilling application and specialize in Down-the-Hole- Hammer applications. There is simply no better choice for foundation contractors than a Berminghammer drill. Productive drilling occurs when the majority of the time spent on-site is devoted to actually drilling.