Reverse Circulation Drill Pipes
Heat-treated alloy construction. Custom seals. Precision-machined inner and outer tubes.
North Star Reverse Circulation Drill Pipe combines high-strength alloy materials, heat treatment and precision machining to support inner and outer tube service life. Custom sealing components help improve seal durability and reduce the risk of air leakage.
Choose from the listed 89, 102 and 114 configurations, or provide samples and technical documentation for a custom configuration review.
Built Around Tube Integrity & Connection Fit
Material processing, sealing and dimensional consistency are central to the product design described in the supplied specification.
Heat-Treated Alloy Materials
High-strength alloy materials are heat treated to support the service life of the inner and outer tubes.
Custom Sealing Components
Customized seals help improve seal service life and reduce the risk of air leakage. Confirm the required seal configuration for your assembly.
Precision-Machined Fit
Precision machining supports interchangeability of matching inner and outer tube components within the specified configuration. Confirm dimensions and interfaces before replacement.
Inner Tube, Outer Tube & Thread Options
Specify both tubes and the connection as one configuration. Matching the nominal pipe size alone does not establish compatibility.
89 Configuration
Outer tube: 89 OD × 6 wall.
Inner tube: 50 OD × 6 wall.
Listed thread: REMRT 3-1/2.
Length range: 1500–6000.
102 Configuration
Outer tube: 102 OD × 6.3 wall.
Inner tube: 60 OD × 7 wall.
Six listed connection options.
Length range: 1500–6000.
114 Configuration
Outer tube: 114 OD × 8.38 wall.
Inner tube: 60 OD × 7 wall.
Nine listed connection options.
Length range: 1500–6000.
Reverse Circulation Drill Pipe Specifications
Compare the outer tube, inner tube, length range and thread designation for each listed configuration.
| Nominal size* | Outer tube OD* | Outer tube wall* | Inner tube OD* | Inner tube wall* | Length* | Thread designation |
|---|---|---|---|---|---|---|
| 89 | 89 | 6 | 50 | 6 | 1500–6000 | REMRT 3-1/2 |
| 102 | 102 | 6.3 | 60 | 7 | 1500–6000 | REMRT 4 |
| 102 | 102 | 6.3 | 60 | 7 | 1500–6000 | METZKE 4 |
| 102 | 102 | 6.3 | 60 | 7 | 1500–6000 | MATRIX 4 |
| 102 | 102 | 6.3 | 60 | 7 | 1500–6000 | R 40 |
| 102 | 102 | 6.3 | 60 | 7 | 1500–6000 | DR 102 |
| 102 | 102 | 6.3 | 60 | 7 | 1500–6000 | M40 |
| 114 | 114 | 8.38 | 60 | 7 | 1500–6000 | REMRT 4-1/2 |
| 114 | 114 | 8.38 | 60 | 7 | 1500–6000 | METZKE 4-1/2 |
| 114 | 114 | 8.38 | 60 | 7 | 1500–6000 | MATRIX 4-1/2 |
| 114 | 114 | 8.38 | 60 | 7 | 1500–6000 | R 45 |
| 114 | 114 | 8.38 | 60 | 7 | 1500–6000 | DR 115 |
| 114 | 114 | 8.38 | 60 | 7 | 1500–6000 | M 45 |
| 114 | 114 | 8.38 | 60 | 7 | 1500–6000 | CSR1 |
| 114 | 114 | 8.38 | 60 | 7 | 1500–6000 | CSR2 |
| 114 | 114 | 8.38 | 60 | 7 | 1500–6000 | FABER 4-1/2 |
*Dimensions are provisionally presented in millimetres (mm); the supplied image does not explicitly state the unit. Confirm units and final dimensions before ordering. Length is listed as a range; confirm the required finished length and measurement basis.
Thread designations are transcribed as shown in the source, including “REMRT”. Confirm the exact thread designation and connection drawing before manufacturing. No thread interchangeability is implied.
Custom configurations: Samples and technical documentation can be provided for customization review.
How to Specify Your RC Drill Pipe
Provide the complete assembly requirements so the tube geometry, sealing and connections can be reviewed together.
01 · Confirm Tube Dimensions
Identify nominal size, outer tube OD and wall thickness, inner tube OD and wall thickness, and the required finished length.
02 · Define the Connection
Provide the exact thread designation, pin and box details and a connection drawing or matching sample. Include existing assembly details.
03 · Confirm Seals & Fit
Provide seal dimensions, material requirements and mating interfaces. State whether you need a complete assembly or replacement components.
Send a Sample. Define the Required Fit.
Custom manufacturing can be reviewed against samples and technical information. Include drawings, dimensions, thread details, sealing requirements, quantity and any inspection criteria with your enquiry.
For replacement inner or outer tubes, provide the existing assembly details so the required fit can be checked before production.
Product & Ordering Questions
What nominal sizes are listed?
The supplied table lists 89, 102 and 114 configurations. Confirm the dimensional units and exact assembly requirements before ordering.
What is the listed length range?
Every configuration in the supplied table lists 1500–6000. Confirm the required finished length, unit and measurement basis when requesting a quotation.
Which thread options are available?
Listed designations include REMRT, METZKE, MATRIX, R, DR, M, CSR1, CSR2 and FABER in the size combinations shown above. Availability is configuration-specific; confirm the exact thread drawing and mating connection.
What materials and processing are described?
The supplied introduction specifies high-strength alloy materials with heat treatment. It does not identify a steel grade, heat-treatment schedule or mechanical-property values; these should be agreed in the order specification.
How does the sealing design help?
The supplied introduction describes customized sealing components intended to improve seal service life and reduce air-leakage risk. The required seal design and mating interfaces should be confirmed for each assembly.
Are inner and outer tubes interchangeable?
Precision machining supports interchangeability within the specified configuration. Replacement parts must match the approved dimensions, interfaces and connection details; nominal size alone is insufficient.
Can Reverse Circulation Drill Pipe be customized?
Yes. The supplied information states that customization can be based on samples and technical documentation. Send the required dimensions, connection details and seal information for review.
What should I send for a quotation?
Provide tube dimensions, finished length, exact thread designation, drawings or samples, sealing requirements and quantity. For replacements, include details of the existing assembly.
Specify the Right RC Drill Pipe Configuration
Send your tube dimensions, required length, thread designation, sealing requirements and quantity. Include samples or technical drawings for a configuration review.
Reverse Circulation Drill Pipes Selection Guide
North Star Reverse Circulation Drill Pipes. Reverse circulation drill pipes with inner and outer tubes, listed thread configurations and custom sealing components.
Configuration and Application
Review the listed inner and outer tube configuration together with the thread designation. The page lists 89, 102 and 114 nominal configurations. Confirm dimensional units, finished length, mating interfaces and seal requirements with drawings or samples.
RC Drill Pipe Requirements
When selecting rc drill pipe, provide the intended application, existing assembly details and the dimensions needed for the mating components. Include drawings, photographs or an existing part reference when available. Confirm the finished configuration with the quotation before ordering.
Related Tooling and Technical Background
Review Down the Hole (DTH) Drill Rods and DTH Adaptors for related North Star tooling. For general background on drill string, see the drill string reference. Product-specific dimensions and compatibility remain subject to the selected configuration.
Request Reverse Circulation Drill Pipes
Send the required configuration, quantity and drawings for a quotation. Identify the connections and dimensions that must match the existing equipment. Our team can review the supplied information and confirm the applicable options.
