Did You Pick the Right Model of Rock Reamer Hole Opener?

In oil drilling, it is very important to choose different toothed roller cone bits according to different formations, which is related to the drilling rate and ultimately affects the drilling cost per meter.

Ⅰ. Common tooth shape of rock reamer hole opener

After market research, currently trenchless users mainly use IADC637. IADC637 belongs to spherical teeth, which are suitable for drilling into hard formations. Speed will be slower.

Ⅱ. Anti-gear roller cone bit

As a construction party, everyone is very concerned about the drilling speed, because the drilling speed is related to the drilling cost per meter. In construction, it is very important to choose different toothed roller cone bits according to different formations.

1. According to the tooth shape, roller cone bits are divided into IADC437 (long spoon/wedge tooth, extremely soft formation), IADC517 (spoon tooth, soft formation), IADC537 (spoon/wedge tooth, medium hardness formation), IADC547 (cone tooth, medium hardness formation) shape tooth, medium hardness formation), IADC617 (small wedge/small bevel tooth/small spoon tooth, medium hard formation), IADC637 (bevel tooth/cone ball/ball tooth, hard formation).

We must remember that there is no best tooth shape, only the most suitable tooth shape.

IADC617, IADC637 and other small teeth (short and dense teeth) drill into the rock with high hardness, and the drilling speed is not as fast as that of the big teeth. Likewise, the tooth profile of a large tooth can be drilled fast, but there is a risk of tooth chipping in hard rock.

2. When choosing a steerable roller cone bit, if the rock is not too hard, we recommend choosing IADC537 as much as possible to obtain a faster drilling speed.

3. When choosing a reamer, we need to pay attention to the direction of a tooth. In the oil industry, roller cone bits were originally designed for forward rotation (clockwise), but it is clear that the roller cone blade is reversed on a trenchless reamer (viewing from the male thread to the female thread). For example, in the shape of a spoon-shaped tooth, the teeth have a "blade" and a "back". Therefore, when the stone is reversed, the "blade" is not broken, but the "back" is used, and the crushing efficiency will be greatly reduced.

Therefore, when choosing a roller reamer, we either choose teeth that are symmetrical on both sides, like IADC 637 bevel ball teeth, or IADC 547 long bevel teeth, or symmetrical wedge teeth.

It should be noted that most of the long teeth such as IADC517/IADC537 on the market use spoon-shaped teeth.

Our current counter-cone and reamer provide faster footage when drilling into pebble or moderately hard rock, which saves money.