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Description
Drill pipes are long tubular sections of pipe that make up the majority of the drill string. They are typically a 31 foot long section of tubular pipe but may be anywhere from 18 to 45 feet in length.
Heavy weight drill pipe (HWDP) is a tubular pipe that adds weight or acts as a transitional piece in the drill string. As a transitional section of the drill string, it is placed between the drill collar and standard drill pipe to reduce fatigue failures. In other applications the HWDP is used as an additional weight to weigh down the drill string.
Heavy weight drill pipe is a medium-weight drilling pipe, (referred standards in API SPEC 7-1). It has bigger wall thickness than common drilling pipe and smaller than drill collar.
Drill collars are a component of the drill string that makes up part of the BHA. They are thicker-walled, heavier, and more rigid than drill pipes and are primarily used to weigh down the drill bit while dampening vibration and impact forces.
Drill Pipe:2-3/8" to 7-5/8" OD, Range 2 and 3
Heavy Weight pipe:2-3/8" to 6-5/8" OD, Range 2 and 3
Drill Collars:2-7/8" to 14"
Grades: E75, X95, G105, S135
Connection threads:NC26, NC31, NC38, NC40, NC46, NC50, 5 1/2FH.6 5/8FH.
Internal Upset: IU, EU, IEU
Specification
| Size designation | Calculated weight | Tool joint designation | Calculated weight | grade | Wall thickness | Upset ends | ||
| in | 1b/ft | Kg/m | in | mm | ||||
| 2 3/8 | 6.65 | NC26 | 6.26 | 9.32 | E.X.G.S | 0.28 | 7.11 | EU |
| 2 7/8 | 10.4 | NC31 | 9.72 | 14.48 | E.X.G.S | 0.362 | 9.19 | EU |
| 3 1/2 | 13.3 | NC38 | 12.31 | 18.34 | E.X.G.S | 0.368 | 9.35 | EU |

PACKING AND SHIPPING
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Factory
plate: cold and hot rolled plate / roll, thick plate, color coating plate (galvanized plate, color plate, horse plate, iron, galvanized aluminum steel), silicon steel, strip; steel profile: working Anggroove, H steel, square steel, flat steel, ball flat steel; 72 kinds of steel, 2900 specifications, more than 200,000 tons of inventory.
Drill Pipe
Classification :
Oil country tubular goods
Key Words:
Oil country tubular goods
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