BQ NQ HQ PQ Reaming Shell

The diamond reaming shell is connected with the drill bit used, the drill bit drilling and side grinding can be carried out at the same time, but the drilling should be kept not less than the drill bit diameter (reaming). It is used to prevent premature wear of the outer diameter of the drill bit, and also to prevent vibration and deformation of the hole wall.

Product Description
The diamond reaming shell is connected with the drill bit used, the drill bit drilling and side grinding can be carried out at the same time, but the drilling should be kept not less than the drill bit diameter (reaming). It is used to prevent premature wear of the outer diameter of the drill bit, and also to prevent vibration and deformation of the hole wall.

The diamond reaming shell is located between the drill bit and the core tube. Its diameter is slightly larger than the drill diameter.

We provide BQ NQ HQ PQ reaming shell, both impregnated and surface set reaming shell with competitive prices.

Main Functions and Features
* Modify the hole wall to keep the hole diameter in line with the design requirements, thus reducing the amount of work required to clean the hole under the new bit.
* Helical type reaming shell provides a good passage for drilling fluids.
* Maintain the working stability of drilling tools in the hole under high-speed conditions.
* Extend the drill bit's life.
* The matrix is wear-proof and its service life is long.

Size of Diamond Drill Bits and Reaming Shells

Model	Outside Diameter of Core Bit		Inside Diameter of Core Bit		Outside Diameter of Reaming shell
Model	Inches	mm	Inches	mm	Inches	mm
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