Tianjin, China
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Nc38 Drill Pipe, Nc50 Drill Pipe, Nc 40 Drill Pipe manufacturer / supplier in China, offering API 7-1/API 5dp Hwdp Spiral Heavy Weight Drill Pipe, ASTM A213 T5 A333 A335 T22 Alloy Steel Seamless Pipe, API 5CT J55 K55 N80 Casing Tubing Seamless Pipe Bc LC and so on.

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Supplier Homepage Products API 7-1/5DP DRILL PIPE API 7-1/API 5dp Hwdp Spiral Heavy Weight Drill Pipe

API 7-1/API 5dp Hwdp Spiral Heavy Weight Drill Pipe

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Min. Order / Reference FOB Price
2 Tons US $1,100-1,850/ Ton
Port: Tianjin, China
Production Capacity: 15000tons/Year
Payment Terms: L/C, T/T, D/P, Western Union, Paypal, Money Gram
Certification: RoHS, CE, BS, JIS, AISI, API
Length: 8.84-9.75m
Usage: Oil Mining, Coal Mining, Well Drilling, Ore Mining
Material: High Manganese Steel
Loading Port: Tianjin/Shanghai
Drill Pipe: Welded Pipe

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Basic Info

Model NO.
Outside Diameter
2-3/8", 2-7/8", 3-1/2", 4", 4.5", 5", 5.-1/2", 6"
Hard Banding
Arnco 100xt, Arnco 300xt, Tcs-Ti, Tcs-8000, etc.
Inner Plastic Coating: 
Tc2000, Tc3000, Tk34, Tk34p
Black, Blue, or as Per Request
Transport Package
Steel Case in Bundle
OD5-1/2INCH 127MM
HS Code
Drill pipe are manufactured in according to or exceeds the requirement of API 5D, 7, and RP7G. The features are introduced as below:

1. The residual elements such as sulphur and phosphorus are strictly controlled in the pipe body and tool joints material during the steel making process, which makes the kind of material with high physical properties.
2. Heat Treatment is a decisive process in the production of tool joints and pipe body. Heat treatment must be uniform and deep enough to ensure required physical properties full length, especially in the critical sections of the connection and weld zone. Heat treatment programs are established on the basis of the actual chemical analysis of each heat of steel to ensure the materials meet or surpass the requirements of API Specification.
3. The drill pipe undergo a full-length inspection that checks the defects; especially the strict inspections on weldneck/upset region are preformed with our both manual and automatic inspection equipments to ensure the high quality.
4 The thread is the most important factor for drill pipes. All threads would be machined with CNC Lathes and inspected with related thread gauges in conformance with API Specification. All threads would be phosphated or copperized and the roots are cold rolled to improve the resistance of galling during initial break-in and drilling operation. Upon the customer's request, The Break-in process is conduced to economize the rig handling time. All Connections would be equipped with pressed steel or plastics steel thread protectors.
Besides SFMC's logo, API monogram, serial number of the finished drill pipe and tool joints and size of the connections are painted or stamped according to the requirements of API specification 
Oilwell Drilling Pipe

Drill rod: BQ, NQ, HQ , PQ ,
1-BQ,NQ, HQ, PQ core barrel
2-Delivery Date: In 15 days
3-Delivery term: By air or by sea
Drilling pipe application:
Widely used for oil well and water well and other industrial.
Drilling pipe types:
According to T6194 SY / 96 "oil casing" points short thread casing and coupling and long thread casing couplings.
Specifications and appearance quality:
(1) according to domestic casing SY/T6194-96 regulations, casing length, its scope uncertain feet 8 to 13 m. But not less than 6 m casing can provide, the amount shall not exceed 20%.

(2) the internal and external surface casing shall not fold, hair grain, overburden bed separation grouting, crack, rolling fold and scarring. These defects shall be completely remove, clear the depth may not exceed 12.5% of the nominal thickness.

(3) the surface not couplings have folded, hair grain, overburden bed separation grouting, crack, rolling fold, scarred and other defects.

(4) the casing couplings and surface should be smooth and thread,does not allow to have the burr, tear and enough to make thread interrupt influence strength and the other is closely connected to the defects.
Chemical composition inspection:
(1) according to SY/T6194-96 regulations. Casing couplings and its the same steel grade. Sulphur, phosphorus content < <   0.045% 0.045%.
(2) according to the provisions of the 84 GB222-take chemical analysis samples. According to the provisions of the relevant part of GB223 chemical analysis.
(3) American petroleum institute (ARISPEC5CT1988 2001:1 regulations. According to the latest version ASTME59 chemical analysis sample preparation, according to the latest version ASTME350 chemical analysis.
Drilling pipe physical tests:
(1) according to SY/T6194-96 regulations. Be crushed flat test (GB246 97) tension test GB228 (87), and water pressure test.

(2) according to the American petroleum APISPEC5CT1988 learn to 1 hydrostatic pressure test version provisions, crushed flat test, sulfide stress corrosion cracking test, hardness testing (ASTME18 or the latest version provisions as E10), tensile test, transverse impact test (ASTMA370, ASTME23 and relevant provisions of the most recent editions of the standards), grain for testing (ASTME112 the latest version or other methods).
Drilling pipe packaging:
According to T6194 SY / 96 regulations,domestic casing should with steel wire or steel belts externally. Each blade casing couplings and a thread of all should screw in protection to protect threads.


Model NO.: heavy weight drill pipe
Tool Joint Materials: 40cr, 45mn2, 35CrMo, 4137h
Application: Well Drilling
Inner Plastic Coating: Tc2000, Tc3000, Tk34, Tk34p
Paiting: Black, Blue, or as Per Request.
Upset: Iu, EU, Ieu,etc
Specification: API, ISO, GOST
HS Code: 7304231000
Pipe Body Material: E75, X95, G105, S135, R780
Length: R1, R2, R3
Outside Diameter: 2-3/8", 2-7/8", 3-1/2", 4", 4.5", 5", 5.-1/2", 6",
Hard Banding: Arnco 100xt, Arnco 300xt, Tcs-Ti, Tcs-8000, etc.

Thread Treatment: Phosphorization, Copper Plating, etc.
Origin: China
Heavy Weight Drill Pipe (HWDP) was developed to provide a gradual transition from the drill collars to the drill pipe. This HWDP helps to prevent stress concentration at the top of the drill collar.It also allow drilling at higher rpms, reducing torque and differential pressure sticking. The HWDP is intended primarily for directional drilling. As it bends easily, it simplifies directional control and minimizes connection fatigue problems common to high-angle or horizontal drilling. The reduced number of pipe failures and increased drill-stem service also make HWDP appropriate for some straight-hole applications. Various combinations of HWDP, drill collars, and standard drill string can be created to meet the challenge of severe drilling conditions.
SFMC can supply integral HWDP from 2-7/8" to 6-5/8". Also SFMC can supply friction welded HWDP, which is assembled with AISI 1340 steel pipe and AISI 4145H or 4137H tool joints. 


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