KAT DRILLING
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Brief Introductions of Reaming Shells
Reaming shell is used to couple the drill bit with the core barrel. It is suitable for use on all conventional and wireline core barrel. This product is mainly designed to ream the hole to the standard diameter. It can keep the stability of the core barrel. When the old bit is replaced by the new one, reaming shell can also provide sufficient clearance for the new bit. It can also help to resist the abrasion of the core barrel.
This type of diamond tool is physically longer than the standard type. So for the compensation of the difference in reaming shell length, an appropriate inner tube extension is necessary to be used. Ranging from broken and abrasive to consolidated and non-abrasive formations, reaming shells are all suitable to use. We can produce reaming shells with 6", 10" and 18" length.
Our reaming shells come in a comprehensive range of sizes to fit various drilling standards:
| Type | Category | Bits Size |
|---|---|---|
| Reaming shell | Double-tube Reaming shell | P56, P59, P75, P76, P91, P110, P130 |
| Single-tube Reaming shell | D56, D59, D75, D76, D91, D110, D130, D150, D171, D223 | |
| Wireline Reaming shell | S56, S59, S75, S95, BQ, NQ, HQ, PQ, T2-46, T2-56, T2-66, T2-76, T2-86, T2-101 |
| Model | Core bit (Outside Diameter) | Core bit (Inside Diameter) | Reaming shell (Outside Diameter) | |||
|---|---|---|---|---|---|---|
| Inches | mm | Inches | mm | Inches | mm | |
| BTW | 2.345 | 59.56 | 1.667 | 42.1 | 2.36 | 59.95 |
| NTW | 2.965 | 75.31 | 2.218 | 56.1 | 2.98 | 75.7 |
| HTW | 3.762 | 95.57 | 2.809 | 71.1 | 3.783 | 96.09 |
| AQ | 1.875 | 47.63 | 1.062 | 26.97 | 1.89 | 48.01 |
| BQ | 2.345 | 59.56 | 1.433 | 36.4 | 2.36 | 59.95 |
| BQ3 | 2.345 | 59.56 | 1.32 | 33.53 | 2.36 | 59.95 |
| NQ | 2.965 | 75.31 | 1.875 | 47.63 | 2.98 | 75.7 |
| NQ3 | 2.965 | 75.31 | 1.775 | 45.08 | 2.98 | 75.7 |
| HQ | 3.762 | 95.57 | 2.5 | 63.5 | 3.783 | 96.09 |
| HQ3 | 3.762 | 95.57 | 2.406 | 61.11 | 3.783 | 96.09 |
| PQ | 4.805 | 122.05 | 3.345 | 84.96 | 4.828 | 122.65 |
| PQ3 | 4.805 | 122.05 | 3.27 | 83.06 | 4.828 | 122.65 |
| T2-56 | 2.205 | 56 | 1.642 | 41.7 | 2.217 | 56.3 |
| T2-76 | 2.992 | 76 | 2.429 | 61.7 | 3.004 | 76.3 |
| T2-86 | 3.385 | 86 | 2.823 | 71.7 | 3.398 | 86.3 |
| T2-101 | 3.976 | 101 | 3.295 | 83.7 | 3.988 | 101.3 |
| T6-101 | 3.976 | 101 | 3.11 | 79 | 3.996 | 101.5 |
| T6-131 | 5.157 | 131 | 4.252 | 108 | 5.157 | 131.5 |
A reaming shell is used to connect the drill bit with the core barrel. Its primary purpose is to ream the borehole to a consistent, standard diameter and maintain the stability of the core barrel during drilling operations.
Yes, reaming shells are designed to be versatile and are suitable for a wide range of formations, from consolidated and non-abrasive to broken and highly abrasive ground.
Because some reaming shells are physically longer than standard types, an inner tube extension is necessary to compensate for the difference in length and ensure the core barrel components fit correctly.
The reaming shell ensures the hole is reamed to the proper diameter. This provides sufficient clearance so that when a worn bit is replaced, the new bit can be lowered to the bottom of the hole without getting stuck or damaged.
Reaming shells can be set with either natural or synthetic diamonds, depending on the specific drilling requirements and the type of formation being targeted.
Commonly produced reaming shells are available in lengths of 6 inches, 10 inches, and 18 inches to accommodate various drilling setups.
