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Heavy Weight DP
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Manufacture: ThyssenKrupp
heavy weight drill pipe are made from one integral forging on a radial hammer
forging machine for uniform strength and reliability. No welds with
questionable quality are of concern to the user Hardbanding: To
optimise wear resistance, hardbanding is standard on tool joints and central
upsets. Hardbanding is deposited after preheating and is followed by stress
relieving. Standard
pads: • One 4" wear pad on both pin and box
end, plus one 1" pad on taper section of box. • Two 3" wear pads on central upsets. The
hardbanding is raised on both tool joints and 1/8" oversize on the
central upset (flush on request). • All standard types of hardbanding can be
provided as well as proprietary types. Stress
Relief Groove and Connection Features: • API stress relief grooves on box ends and
API stress relief grooves on pin end are standard. • Thread roots are cold worked on all sizes. • All connections are phosphated, coated with
lubricant and provided with pressed steel protectors. |
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