| Type: | Core Drill |
|---|---|
| Usage: | Coring |
| Certification: | CE, ISO |
| Application: | Reaming |
| Industry: | Geological Survey |
| Payment Term: | Tt or LC |
| Samples: |
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| Customization: |
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A diamond reaming shell is a tool used in the drilling industry to enlarge the diameter of an existing borehole. It consists of a cylindrical metal shell with industrial-grade diamonds embedded on its surface. The diamonds on the shell act as cutting elements, facilitating the reaming process. Here's how a diamond reaming shell works:
Initial Placement: The diamond reaming shell is attached to the bottom of the drill string, typically below the core bit or any other drilling tool being used. It is lowered into the borehole to the desired depth.
Rotation and Weight Application: The drill string, including the diamond reaming shell, is rotated either by a top drive system or a rotary table at the surface. Simultaneously, weight is applied to the drill string, exerting downward force onto the reaming shell.
It's important to note that the specific performance and effectiveness of a diamond reaming shell can vary depending on factors such as the diamond quality, concentration, shell design, drilling parameters, and the characteristics of the formation being drilled. Proper selection, monitoring, and maintenance are crucial for maximizing the efficiency and longevity of the diamond reaming shell in a drilling operation.
Cutting Action: As the diamond reaming shell rotates and the applied weight pushes it against the borehole walls, the embedded diamonds on the shell come into contact with the formation. The diamonds, being the hardest known natural material, exert high cutting forces on the formation, effectively grinding and shearing the rock or sediment.
Borehole Enlargement: The cutting action of the diamonds gradually removes material from the borehole walls, enlarging its diameter. The reaming shell is advanced progressively deeper into the borehole, ensuring uniform enlargement along the desired section.
Cuttings Removal: During the reaming process, drilling fluid or mud is pumped down through the drill string and exits through nozzles near the reaming shell. The fluid carries away the cuttings and debris generated by the cutting action, helping to maintain a clean and clear borehole.
Smoothing and Polishing: The diamonds on the reaming shell also contribute to the smoothing and polishing of the borehole walls. As they interact with the formation, they help to remove any rough or irregular surfaces, resulting in a smoother and more uniform borehole.
Completion and Transition: Once the desired diameter enlargement is achieved, the diamond reaming shell is typically removed from the drill string. Depending on the drilling objectives, the borehole may be further conditioned or additional drilling tools may be deployed for further operations, such as casing installation or coring.
Model or type:
Specifications
| ITEM | DIAMOND BIT | Reaming shell | |||||
| "Q" Series Wireline assembly |
Size | Bit Outer Diameter | Bit Inner Diameter | ||||
| mm | inch | mm | inch | mm | inch | ||
| AQ | 47.60 | 1.88 | 26.97 | 1.06 | 48.00 | 1.89 | |
| BQ | 59.50 | 2.35 | 36.40 | 1.43 | 59.90 | 2.36 | |
| NQ | 75.30 | 2.97 | 47.60 | 1.88 | 75.70 | 2.98 | |
| HQ | 95.58 | 3.77 | 63.50 | 2.50 | 96.00 | 3.78 | |
| PQ | 122.00 | 4.80 | 84.96 | 3.35 | 122.60 | 4.83 | |
| Metric T2 Series | 36 | 36.0 | 1.417 | 22.0 | 0.866 | 36.3 | 1.429 |
| 46 | 46.0 | 1.811 | 32.0 | 1.260 | 46.3 | 1.823 | |
| 56 | 56.0 | 2.205 | 42.0 | 1.654 | 56.3 | 2.217 | |
| 66 | 66.0 | 2.598 | 52.0 | 2.047 | 66.3 | 2.610 | |
| 76 | 76.0 | 2.992 | 62.0 | 2.441 | 76.3 | 3.004 | |
| 86 | 86.0 | 3.386 | 72.0 | 2.835 | 86.3 | 3.398 | |
| 101 | 101.0 | 3.976 | 84.0 | 3.307 | 101.3 | 3.988 | |
T Series |
TAW | 47.6 | 1.875 | 23.2 | 1.31 | 48.0 | 1.89 |
| TBW | 59.5 | 2.345 | 44.9 | 1.77 | 59.9 | 2.36 | |
| TNW | 75.3 | 2.965 | 60.5 | 2.38 | 75.7 | 2.98 |
|
| Reaming classification | |
| T series | T36,T46,T56,T66,T76,T86 |
| Cable series | AWL,BWL,NWL,HWL,PWL(Front end,rear end) |
| WT series | RWT,EWT,AWT,BWT,NWT,HWT(single tube/double tube) |
| T2/T series | T256,T266,T276,T286,T2101,T676,T686,T6101,T6116,T6131,T6146,T6H |
| WF series | HWF,PWF,SWF,UWF,ZWF |
| WG series | EWG,AWG,BWG,NWG,HWG(single tube/double tube |
| WM series | EWM,AWM,BWM,NWM |
| Others | NMLC,HMLC,LTK48,LTK60,TBW,TNW,ATW,BTW,NTW,AQTK NXD3,NXC,T6H,SK6L146,TT46,TB56,TS116,CHD101 |
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