Shell Reamers

Product Details:

NQ Back End Reamer Shell is a cylindrical drilling tool set with diamonds on its outer surface, designed to maintain the standard diameter of the borehole, stabilize the drill string, and provide clearance for the core barrel and replacement bits during core drilling operations. It connects to the drill bit, and as the bit drills, the reamer shell simultaneously reams the hole to a precise, constant diameter, preventing vibration and deformation of the borehole walls. The "NQ" designation specifies the size and core diameter it's designed for.
 Key Characteristics and Functions

• Hole Maintenance:Its primary function is to ream the hole to the correct, constant diameter, ensuring proper clearance for the core barrel. 
• Stabilization:It acts as a stabilizer, keeping the drill string steady and improving drilling stability. 
• Bit Replacement:When the old bit is replaced by a new one, the reamer shell provides adequate clearance for the new bit. 
• Diamond Impregnation:The outer surface is embedded with natural or synthetic diamond particles, which grind against the borehole walls. 
• Core Barrel Compatibility:It couples the drill bit to the core barrel, suitable for both conventional and wireline core barrels. 
• Formation Versatility:Available in different pad designs (single, double, or three pads), it can be used in all types of rock formations, from broken and abrasive to consolidated and non-abrasive. 
• Hole Wall Integrity:Helps to prevent early wear on the outer diameter of the core bit and resists the abrasion of the core barrel. 

Context: NQ Core Drilling

• NQ:This is a specific core size in diamond core drilling, indicating the diameter of the core that can be recovered. 
• Backend/Back Reamer:Refers to the reamer shell's position, typically connected behind the core bit and inside the core barrel. 

Additional Information:

• Production Capacity: As per requirement

Product Details:

A PQ Diamond Reamer Shell is a diamond-encrusted drilling tool used in geological core drilling to maintain hole diameter, stabilize the drill string, and provide clearance for the core barrel. It connects the drill bit to the core barrel and features diamond pads designed to ream the hole walls, ensuring consistent diameter for efficient drilling and sample recovery. The "PQ" designation refers to a standard size within a series of diamond core drilling tools, indicating its specific dimensions for use with PQ-size drill components.
 Key Features and Functions:

• Hole Wall Stabilization:The primary function is to keep the hole wall at the required standard diameter, preventing deviation and ensuring stability of the drilling system. 
• Clearance for Drilling Tools:It provides adequate clearance for the core barrel and ensures enough space for a new drill bit when an old one is replaced. 
• Connection:It acts as a coupling mechanism to join the drill bit with the core barrel assembly. 
• Diamond Impregnation/Setting:The reaming shell's steel body is set with either impregnated diamond (synthetic diamonds embedded in a matrix) or surface-set natural/synthetic diamonds on pads to provide the abrasive surface for reaming. 
• Spiral Waterways:These channels allow water to be conducted down the drill string to wash away debris and cuttings from the hole. 
• Versatility:Reaming shells are designed to work in a wide range of formations, from broken and abrasive to consolidated and non-abrasive. 
• Size Designation:"PQ" denotes a specific size within the standard AQ/BQ/NQ/HQ/PQ series of tools, dictating the diameter of the reamer. 

How it Works:During drilling, the reamer shell is positioned between the drill bit and the core barrel. As it rotates with the drill string, the diamond-studded pads make contact with the borehole wall, smoothing and widening it to the designed diameter. This process ensures that the core barrel can pass through the hole without obstruction and maintains the straightness of the borehole for optimal drilling performance and core sample recovery. 

Additional Information:

• Production Capacity: As per requirement

An HQ Back End Reamer Shell is a diamond drilling tool that connects the drill bit to the core barrel, stabilizing the hole and ensuring the correct constant diameter. It is set with diamonds on its outer surface and is physically longer than standard reamer shells to provide sufficient clearance for bit replacement and resist wear on the core barrel. "HQ" refers to the core size it is designed for, and "Back End" distinguishes it from a "Front End" reamer shell.
 Key Functions and Characteristics

• Stabilization:It acts as a stabilizer, ensuring the drill string's stability. 
• Reaming:The shell's outer surface, embedded with diamonds, grinds the hole to a constant specified diameter, maintaining the hole's gage. 
• Core Barrel Coupling:It serves as the connection point between the drill bit and the core barrel, making it an integral part of the drilling system. 
• Clearance:Its length helps maintain adequate clearance for the core barrel and ensures sufficient space when a new bit replaces an old one. 
• Diamond Tool:It is set with either natural or synthetic diamonds on its outside surface. 
• Back End Type:It is designed for use at the back of the reaming tool, as opposed to a "front end" reamer. 
• HQ Size:The "HQ" designation refers to a specific size in core drilling, with HQ often associated with a standard HQ core diameter of 63.5 mm. 

• Nq Hq Diamond Reaming Shell Back Reamer for Drill Bit

Additional Information:

• Minimum Order Quantity: 1 Piece
• Production Capacity: As per requirement