What is a down-the-hole drilling rig

A down-the-hole drill, usually called DTH by most professionals, is basically a jackhammer screwed on the bottom of a drill string. The fast hammer action breaks hard rock into small cuttings and dust that are evacuated by a fluid (air, water or drilling mud). The DTH hammer is one of the fastest ways to drill hard rock. The system is thought to have been invented independently by Stenuick. Origin of the nameDTH is short for “down-the-hole”. Since the DTH method was originally developed to drill large-diameter holes. . In DTH drilling, the percussion mechanism – commonly called the hammer – is located directly above the drill bit. The drill pipes transmit the necessary feed force and rotation to the hammer and the bit, along with the flui. . A is first thought to have been used for rock drilling in 1844. Many quarries used hand held tools that required the driller to suspend himself from a rope over the quarry face in order to place the drill hole in. [pdf]

What are the 90-hole submersible drilling rigs

Underground coring drill rig for easy tailoring and upgrading and capable of drilling holes at all angles from vertically up to vertically down.. Underground coring drill rig for easy tailoring and upgrading and capable of drilling holes at all angles from vertically up to vertically down.. Detailed specifications for AKITA Drilling Rig 90, including drawworks, power, substructure, mast, top drive, mud pumps, and other equipment.. The rig is modular in design with a number of options which make it easier to tailor to specific needs and to upgrade when requirements change. With the assistance of a positioner and a turntable the drill is capable of drilling holes in all angles from vertically up to vertically down. The drill uses an electric motor to power the hydraulics on the machine. The drill can be paired with an . . Material contained in the AKITA Drilling Ltd. web site is for information purposes only and is not intended to constitute an offering of securities in any jurisdiction. Information disclosed under the corporate and securities laws of Canadian jurisdictions applicable to AKITA Drilling Ltd. is not intended to be in any way qualified, amended, modified or supplemented by the information . . The LM™90 is the largest Boart Longyear underground diamond coring rig and is suited for drilling deep holes. Equipped with a 29,000-lb feed frame, this drill provides high pullback force as well as a relatively quick rod-handling rate. [pdf]

Core drilling rig circulation system

The mud circulation system plays a vital role in surface core drilling. It's like the life - blood of the drilling rig. The main purposes of this system are to cool and lubricate the drill bit, carry the cuttings out of the borehole, and maintain the stability of the borehole walls.. The mud circulation system plays a vital role in surface core drilling. It's like the life - blood of the drilling rig. The main purposes of this system are to cool and lubricate the drill bit, carry the cuttings out of the borehole, and maintain the stability of the borehole walls.. The circulation system on the rig is the system that allows for circulation of the Drilling Fluid or Mud down through the hollow drill string and up through the annular space between the drill string and wellbore.. The drilling mud circulation system ensures that the drilling fluid performs multiple functions, including mud cooling, bringing cuttings to the surface, and providing hydrostatic pressure to prevent blowouts. An optimized circulation system improves drilling efficiency. [pdf]