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RC Drill Pipe
Foremost drill pipe is the benchmark for excellence in reverse circulation drilling...
Advanced Pipe Design
Over 40 years experience in the manufacture of reverse circulation products have led to durable, reliable, and advanced drill pipe designs.
Selection and Versatility
To suit customer requirements, Foremost offers various drill pipe configurations with or without connector tubes such as Concealed Inner Tube, Connector Tube, Protruding Inner Tube and Hammer Pipe. Typically, Foremost pipe is sold in standard foot or meter lengths. Custom lengths are also available upon request.
Suspended and Interchangeable Inner Barrels
Foremost patented inner barrel suspension and retention system eliminates problems arising from the transfer of vibration and torque loads applied to the outer pipe. The o-ring retainers absorb percussion forces and allow for replacement of the inner barrel in the field if required.
Superior Welding and Quality Control
Foremost uses advanced production equipment with controlled temperature welding and stress relieving of tool joints. Our material specifications and welding technique allow for the maximum possible wall thickness and strength of pipe in the tool joint area. Foremost drill pipe passes through extensive quality control inspections prior to customer delivery.
Complete Range of Accessories and Subs
Foremost provides a range of reverse circulation pipe accessories including air swivel assemblies, saver subs, bit subs, interchanges, wear sleeves, blow-down and blow-back subs, and open center bits.
Series |
Diameter |
Tension |
Working Torque (ft/lbs) |
Weight (lbs) |
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Working | Yield | Maximum | |
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Concealed Inner Pipe (CIP) Drill Pipe |
4" |
139,200 |
244,200 | 301,700 | 7,000 | 146 @ 10' length |
4 1/2" |
127,680 |
210,100 | 286,500 | 8,900 | 421 @ 20' length | |
| 9 5/8" | 285,500 |
466,000 | 635,700 | 97,700 | 1,347 @ 20' length | |
| 10 3/4" | 467,900 |
843,000 | 1,053,700 | 100,000 | 1,760 @ 20' length | |
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Connector Tube Pipe (CTP) Drill Pipe |
4 1/2" | 127,680 | 210,100 | 286,500 | 8,900 | 417 @ 20' length |
| 5 1/2" | 127,700 |
206,900 | 282,100 | 15,500 | 548 @ 20' length | |
| 7" | 283,000 |
466,000 | 583,000 | 30,500 | 804 @ 20' length | |
Protruding Inner Pipe (PIP) Drill Pipe |
3 3/4" | 93,500 |
200,600 | 242,700 | 4,800 | 124 @ 10' length |
| 5 1/2" | 127,700 | 206,900 | 282,100 | 15,500 | 540 @ 20' length | |
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Hammer Pipe |
6 5/8" |
282,800 | 454,300 | 628,300 | Not Applicable | 480 @ 10' length |
9" |
343,800 | 556,800 | 770,000 | Not Applicable | 580 @ 10' length | |
| 10 3/4" | 615,200 | 1,124,000 | 1,405,000 | Not Applicable | 870 @ 10' length | |
| Note 1: All pipes are sold in standard foot or meter lengths. Custom lengths are available upon request. Note 2: With all Foremost pipe designs, the inner tube is easily removed and replaced in the field. |
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Concealed Inner Pipe (CIP) Drill Pipe
(Available sizes: 4", 4 1/2", 9 5/8", 10 3/4")
CIP drill pipe incorporates a dual tube design, using both an outer barrel and a concealed inner tube. Connector tubes are not required when using CIP drill pipe. The inner tubes are sealed when the outer barrels are threaded together.
Connector Tube Pipe (CTP) Drill Pipe
(Available Sizes 4 1/2", 5 1/2", 7")
CTP drill pipe incorporates a dual tube design, using both an outer barrel and a concealed inner tube. Connector tubes are required when using. CTP and are manually connected.
Protruding Inner Pipe (PIP) Drill Pipe
(Available Sizes 3 3/4", 5 1/2")
PIP drill pipe incorporates a dual tube design, using both an outer barrel and an inner tube which protrudes from the pin tool joint. Connector tubes are not required when using PIP drill pipe. The inner tubes are sealed when the outer barrels are threaded together.
Hammer Pipe
(Available Sizes 6 5/8", 9", 10 3/4")
RC hammer pipe incorporates a dual tube design, using an outer barrel and an inner tube which protrudes from the box tool joint. Connector tubes are not required when using
hammer pipe. The inner tubes are sealed when the outer barrels are threaded together.