Heavy Weight Drill Pipe
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Thick-walled pipe, called Heavy Weight Drill Pipe (HWDP), was developed to provided a gradual transition from the heavy drill collars to the relatively lightweight drill pipe. This intermediate-weight pipe has a wall thickness of approximately 1”, and he
General properties
Pipe body OD from 2-7/8” to 6-5/8”;
Welded construction as standard; integral on request;
Standard service steel grades (AISI 1340 pipe body, AISI 4145H-modified tool joints);
Sour service or non-magnetic steel grades (proprietary ERS 425 and Amagnit 501); and
Internal coating optional.
Tool joint properties
Extra-length tool joints permit a maximum re-cut capability;
API or high performance premium connections);
Enhanced fatigue resistance (threads cold- rolled, pin relief groove and box bore-back);
4” of proud casing-friendly hardbanding on pin OD and box OD, plus 1” flush on the box taper; and
Phos-coating to prevent galling
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