Drilling in Rock - The most important factor in a successful bore is patience. When drilling in harder formations it is important not to force the incredibly, but let it drill at its own pace. Apply steady pressure. Too much pressure will burn the bit. Start with 500 pounds of forward thrust and move up as needed based on the conditions of the bore site. Rotational torque may also start at 500 pounds. It is seldom necessary to use more than 1,500 pounds of thrust. Slow rotation also gives the incredibly more time to work. Simply allow the incredibly to work while maintaining enough pressure to accomplish the job.
Drilling in Soft Conditions - The drilling technique used in soft conditions is like a flat bill bit.
Steering in Rock- The best method for steering in rock is to push into the rock and cut over to create a relief, pull back, rotate, and do it again. If you want to go to 12 o’clock with a standard incredibly, you will normally push in at 10 and rotate to 2. With an aggressive incredibly, you would push in at 9 and rotate to 1. After creating a relief, pull back and start drilling slowly into the relief. The incredibly patented drill bit with concave steering channel will follow the point of least resistance.
Steering in Soft Conditions- Steering in soft conditions is like a flat bill bit - turn and push. However, since the incredible steers faster than other bits, you may only need to push half as far as you would with a flat bill bit to get the same result. New users should locate often to prevent oversteering in soft conditions.
Install the O-ring at the back of the incredibly. Install the bolts, hand tight, in each of the bolt holes of the incredibly. Tighten the bolts to the proper foot-pounds using a torque wrench, according to the instructions included with your incredibly or on the label at the back of the incredibly.
|INCREDIBIT TORQUE GUIDE|
|TORQUE||65 FT LBS||65 FT LBS||120 FT LBS||165 FT LBS||250 FT LBS|
A major cause of wear on a lncredibit is insufficient or improper drilling mud. Mud is used to a) seal the hole,
b) suspend the cuttings, and c) flush the cuttings out of the hole. If all the cuttings are not removed from the hole, all down hole tooling will wear prematurely. Never drill with plain water, or just water and polymer. When drilling in soft conditions, be careful not to outrun the mud.
The lncredibit needs volume not high pressure. Pressure greater than 500 psi or dirty mud from a mud recovery system will wash out the water ports of the lncredibit. The following chart shows the minimum volume of mud required to flush the cuttings from the hole for each size Incredibit.
|INCREDIBIT SIZE||2-3/4"||3"||3-1/ 2"||4-1/8"||5"|
|AVERAGE HOLE DIAMETER CREATED||4-1/2"||5-1/2"||6-1/2"||9"||11"|
|GALLONS OF CUTTINGS CREATED PER FOOT||0.83||1.23||1.73||3.31||4.94|
|MIN. GALLONS OF MUD PER FOOT TO CLEAN HOLE||2.48||3.70||5.17||9.91||15.2|