Heavy Weight Drill Pipe, HWDP, Heavy Wall Drill Pipe Of Downhole Drilling Tools

HWDP(Heavy Weight Drill Pipe) Description: Heavy weight drill pipe is the most commonly used in the vertical section of the hole and provides weight on the bit for directional drilling while maintaining more flexibility than a drill collar.Heavy weight drill pipe has a "center upset", also known as wear pad, that increases tube life by protecting the tube from wearing on the outer diameter by keeping the tube away from the hole wall. It also reduces hole drag and differential sticking problems. Function: Heavyweight drill pipe (HWDP) may be used to make the transition between the drill collars and drill pipe. The function of the HWDP is to provide a flexible transition between the drill collars and the drill pipe Standard: API SPEC 7-1 Material: AISI 4145 H, AISI 4145 H MOD, Non-mag material Specification: 3-1/2", 4-1/2", 5", 5-1/2" Type: Integral & Friction welded Techinical Paramete: Heavy weight drill pipe Products Range: 2-7/8" ~6-5/8" Material: AISI 4145H, AISI1340 Type of End Finish: integral, welded type OD W Body ID Upset OD Upset  Length Elevator upset OD Connection Yield strength Body Data Conn type ID OD Length Pin/Box Body Tool joint Tens. Yield Tors. Yield A B C D E F G I/H in Lb/ft in in in in in in in ksi ksi lbs Ft-lbs 2-7/8 17.4 1-3/4 3-1/4 24 3-3/16 NC31 1-3/4 4-1/8 27/21 65 120 265,600 12,600 3-1/2 25 2-1/16 4 24 3-5/8 NC38 2-1/16 4-3/4 27/21 65 120 408,200 23,100 3-1/2 23.4 2-1/4 4 24 3-5/8 NC38 2-1/4 4-3/4 27/21 65 120 366,900 21,800 4 38.8 2-1/2 4-1/2 24 4-3/16 NC40 2-1/2 5-1/4 27/21 65 120 497,700 33,300 4-1/2 40.8 2-13/16 5 24 4-11/16 NC46 2-13/16 6-1/4 27/21 65 120 548,100 47,400 5 49.5 3 5-1/2 24 -1/8 NC50 3 6-5/8 27/21 65 120 816,800 66,800 5-1/2 49.6 3-7/8 6 24 5-11/18 5-1/2FH 3-7/8 7 27/21 65 120 777,700 76,900 5-7/8 58.2 3-7/8 6-3/8 24 6 5-1/2FH 4 7 27/21 65 120 995,500 100,900 6-5/8 59 5 7-1/8 24 6-15/16 6-5/8FH 5 8 27/21 65 120 946,400 120,500