D-Series Reaming Shells

This economical diamond set reaming shell is available for use on all conventional and wireline core barrel assemblies with drill hole sizes of up to 8 inches (203 mm) in diameter. The Dimatec D-Series reaming shell is manufactured with a full matrix body gauge ring that is cast onto the steel tool body for maximum bond strength and tool integrity. In addition, the D-Series reaming shell gauge ring features spiral waterway canals that both effectively clear the bit cuttings and provide full 360° hole contact with the matrix body gauge ring.

The setting on the gauge ring is a combination of mechanically rounded ‘P3’ Grade natural drill diamond in the size range of 20 to 35 stones per carat and seismic grade tungsten-carbide wear pads that are cast into a tough, abrasion resistant matrix body.

The Dimatec D-Series reaming shell is recommended for use in light to medium duty applications where the formation conditions are relatively consolidated and non-abrasive. Although hard-metal strips that are used to armor coat the steel tool body are normally not provided on D-Series reaming shells, this option is available at an additional cost.

Optional setting is also available where the natural mined ‘P3’ grade diamond is replaced with synthetic materials and is intended for use on drilling projects where potential contamination by natural diamond crystals is objectionable.

Heavy Duty Reaming Shells

This “Heavy Duty” type represents Dimatec’s premium line of reaming shells. They are intended for use primarily on wireline core barrel assemblies with drill hole sizes of up to 6 inches (152 mm) in diameter.

The Dimatec ‘Heavy Duty’ reaming shell is manufactured with a full matrix body gauge ring that is cast onto the steel tool body for maximum bond strength and tool integrity. The reaming shell gauge ring features include:

• Spiral waterway canals that are wider than those on the ‘D-Series’ type and as such reduce the potential for blockage by pebbles or other debris.
  
• A tapered leading edge for ease of movement down the drill hole.
  
• Placement directly adjacent to the male thread connection to reduce the possibility of abrasive wash-out between the shoulder of the drill bit body and the gauge ring of the reaming shell.

The setting on the gauge ring of the ‘Heavy Duty’ reaming shell is substantially more dense than that of the ‘D-Series’ type and is designed to provide the longest possible life. The gauge ring setting materials are a combination of mechanically rounded ‘P3’ Grade natural drill diamond, mesh-size synthetic diamond and seismic grade tungsten-carbide wear pads that are cast into a tough, abrasion resistant matrix body.

The Dimatec ‘Heavy Duty’ reaming shell is recommended for use in the most difficult applications where the formation conditions are highly unconsolidated and abrasive. As a standard feature, all Dimatec ‘Heavy Duty’ reaming shells are supplied with hard-metal strips on the exposed outside diameter of the steel tool body. These hard-metal strips are composed of micron sized tungsten-carbide particles that are suspended in a metal alloy and are used to armor coat the steel tool body in order to prevent premature wear.

Optional setting is also available where the natural mined ‘P3’ grade diamond is replaced with synthetic materials and is intended for use on drilling projects where potential contamination by natural diamond crystals is objectionable.