Heavy Weight Drill Pipe
DHOT HWDP are manufactured from
4145H MOD Q&T steel with a hardness range of 285-341 BHN.
All API connections comply with dimensional requirements specified in
API Spec. 7 and guidelines presented in API RP7G.
All connections are phosphate-coated to improve resistance to galling as
well as “cold rolled” to provide longer
fatigue life. API stress relief groove pin and bore back box are
available upon request. DHOT HWDP are offered as
conventional or spiral.
When ordering, please specify:
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HWDP OD
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HWDP bore ID
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Length if not standard (31 ft.)
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Conventional or Spiral
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Size and Type of Connections, example: NC 50
box up x NC 50 pin down
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Cast or pressed steel thread protectors
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Hard banding
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Internal Plastic Coating
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