NTW Series Diamond Reaming Shells Efficient Core Retrieval Rapid Drilling

Product Specification

NTW series efficient core retrieval rapid drilling progress diamond reaming shell

Diamond Impregnation: The diamonds embedded on the outer surface of the reaming shell are usually synthetic diamonds. These diamonds are carefully distributed and bonded onto the shell using advanced manufacturing techniques. The diamond impregnations vary in size and concentration, depending on the specific drilling requirements and the hardness of the rock formations being encountered.

Types of Reaming Shells: There are different types of diamond reaming shells available to suit various drilling conditions:

Surface-Set Reaming Shells: These shells have larger-sized diamonds that are mechanically attached to the shell using a metal matrix or electroplating process. Surface-set reaming shells are ideal for drilling in soft to medium-hard formations such as clay, shale, and sandstone.

Impregnated Reaming Shells: These shells have smaller-sized diamonds that are impregnated within the matrix of the shell. The diamonds are distributed evenly throughout the matrix, ensuring a consistent cutting action. Impregnated reaming shells are suitable for drilling in medium to hard rock formations, including limestone, granite, and basalt.

Core Recovery: The main objective of using a diamond reaming shell is to maximize core recovery. As the reaming shell grinds and disintegrates the rock formations, the core sample is collected and stored within the inner barrel of the core bit. The design of the reaming shell plays a crucial role in achieving high core recovery rates by minimizing the chances of core loss or damage during the drilling process.

Borehole Stabilization: The reaming shell provides stability to the borehole, preventing it from collapsing or sloughing. This stability is crucial, especially in loose or unconsolidated formations. By maintaining the integrity of the borehole, the reaming shell helps in achieving a straight and accurate hole trajectory.

Flushing Holes and Waterways: The reaming shell is equipped with waterways or flushing holes along its length. These holes allow for the continuous circulation of drilling fluid or water during the drilling process. The flushing fluid serves multiple purposes, including cooling the diamonds to prevent overheating, carrying away the drill cuttings, and lubricating the drilling process.

Compatibility with Core Bits: Diamond reaming shells are designed to be compatible with specific core bits. They are typically used in conjunction with a core bit, which is the cutting tool that is attached to the bottom of the reaming shell. The core bit and reaming shell work together to achieve efficient drilling and core recovery.

Maintenance and Replenishment: Diamond reaming shells are subject to wear and tear during drilling operations. The diamonds on the outer surface gradually wear down, reducing their cutting efficiency. Regular inspection and maintenance of the reaming shell are necessary to ensure optimal performance. When the diamond impregnations are significantly worn, the reaming shell may need to be replaced or replenished with fresh diamond impregnations to maintain its effectiveness.

In summary, diamond reaming shells are specialized tools used in core bit drilling, mining, and geological exploration. They are designed to enhance drilling efficiency, stabilize the borehole, and maximize core recovery. The diamond impregnations, flushing holes, and compatibility with core bits are key features that contribute to their effectiveness in various drilling applications.

FAQ

Q1: How should I handle and store a diamond reaming shell when not in use?
A1: Diamond reaming shells should be handled with care, stored in a clean and dry environment, and protected from potential damage or contamination.

Q2: Can a diamond reaming shell be used for reaming previously drilled boreholes?
A2: Yes, diamond reaming shells can be used for reaming existing boreholes to enlarge their diameter for various purposes.

Q3: What are the signs that indicate a diamond reaming shell needs to be replaced?
A3: Signs include excessive wear on the diamond-impregnated matrix, reduced cutting efficiency, and poor core recovery.

Q4: Can a diamond reaming shell be used in high-temperature drilling environments?
A4: Yes, diamond reaming shells can withstand high-temperature drilling environments, but it's important to consider the limitations of the specific product and consult the manufacturer's guidelines.

Q5: Can a diamond reaming shell be used for geotechnical drilling applications?
A5: Yes, diamond reaming shells are commonly used in geotechnical drilling projects to obtain core samples for soil and rock analysis.