How does a DTH drill work?

DTH equipment consists of a drilling hammer and a piston-powered by compressed air. As the drill string rotates, the drilling hammer strikes down on the rock. The drill bit receives its striking power from a piston inside the hammer that is powered by compressed air.

How do you use a power drill?

Put the drill in reverse to extract the drill bit from the hole you just drilled. The lock position prevents the trigger from being pulled. Battery or cord: This is the power source for your drill. Some drills are corded and plug into the wall. Other power drills have a rechargeable battery pack.

How long did it take to drill a 12,000 ft hole?

The original estimate for completion of a 12,000-foot hole was 30 days using the conventional rotary technique, which was reduced to 13 days using the DTH method. Before DTH was used, drillers would typically case the vertical portion of the well and convert to rotary drilling to drill at a tangent.

How fast can you drill a well with DTH?

With DTH, it was now possible to turn 2-4 degrees curves and drill the well’s tangent up to 30 degrees or greater averaging 300 feet per hour, where rotary drilling would progress 30-40 feet per hour.

How do you drill a hole in metal?

Put a drop or two of machine oil on the spot to be drilled. Place the point of the drill bit into the indention made with the punch. Start the drill at a slow speed and put heavy pressure on the metal. Maintain the pressure as the drill speed is increased with the variable speed trigger.

How do you lubricate a drill rig?

rilled hole.CommissioningEnsure ha er lubricator is working. Pour 1/2 pint (0.30 litres) of ai line oil into the hammer. When attached to drill rig, blow air through to ensure all int rnal parts are lubricated. Operate at low pressure initially. Progressively increasing, during the first hour, in