Diameter of Casing pipe: 4 1/2 "-20", tube：2 3/8 "-5"

Strength grade: API E75-S135 and other materials.

Length range：R1:18-22ft,R II : (27-30ft); R III: (38-45ft)

Product Detail | Technical Information | Packaging | More

Product Detail1

Shanghai Metal Corporation is a leading API Oil Drilling Pipe manufacturer and supplier.

The API oil‑well drill pipe complies with API Spec 5DP standard. It serves as the core part of drill string assembly for onshore and offshore oil, natural gas and coal‑bed methane drilling operations. It connects surface rig equipment with down‑hole drilling assemblies.The drill pipe undertakes multiple critical functions: transferring rotary torque from the surface to drill bits, circulating drilling mud to carry cuttings out of boreholes, and extending continuously to increase well depth during drilling. It has to sustain combined heavy loads including tension, torsion, bending, internal and external pressure as well as cyclic vibration under complex underground conditions.Different steel grades are selected according to well depth and formation environment. Matched tool‑joint threads and upset end structures guarantee connection reliability. Repeated service is available under proper operating and maintenance conditions. It should be distinguished from casing pipe, which is applied for borehole wall support after well drilling.

If you want to know more about our Steel Pipe Products or API Oil Drilling Pipe price please feel free to contact us, we will reply you within 24 hours.

Drill pipe features alloy steel pipe body with friction-welded tool joints. The pipe body conveys drilling fluid, and joints transmit torque for connection. Per API standards, drill pipes are classified by length into R1, R2 and R3: - R1 (shallow wells): 5.486‑6.706 m (18‑22 ft) - R2 (general drilling): 8.230‑9.144 m (27‑30 ft) - R3 (deep wells): 11.582‑13.716 m (38‑45 ft)

1. High Dimensional & Geometric Precision Maintains stable size and shape tolerance during manufacturing, helping avoid assembly mismatch and on‑site fitting adjustments.

2. Good Low‑Temperature Toughness Retains impact resistance under low‑temperature well conditions, lowering the risk of brittle fracture in cold‑region drilling operations.

3. High Connection Strength & Sealing Reliability Optimized tool‑joint inner diameter together with stable sealing structure, improves fluid circulation efficiency and reduces fluid leakage risk.

4. Strong Torque‑Resistant & Fatigue Performance Withstands repeated torsional and alternating stress, slows fatigue damage and extends overall service life of drill pipe.

1. On‑land Conventional Oil & Gas Drilling Suitable for regular on‑shore oil‑gas exploration. Stable mechanical performance copes with common down‑hole loads. R2 is recommended.

2. Shallow‑well and Workover Service Suitable for shallow resource drilling and well maintenance. Short length simplifies pipe handling on site. R1 is recommended.

3. On‑land Deep‑well Drilling Suitable for deep reservoir development. Less joints reduce connection‑related risks and boost efficiency. R3 is recommended.

4. Cold‑area Drilling Projects Suitable for low‑temperature field operations. Good low‑temperature toughness prevents brittle fracture under cold conditions. R2 is preferred.

Technical Information of API Oil Drilling Pipe/ Oil Well Drilling Pipe:

Size(inch)	Weight Designation	Calculated Plain-End weight		Outside Diameter		Wall Thickness
Size(inch)	Weight Designation	Lb/ft	Kg/m	inch	mm	inch	mm
2‐3/8	6.65	6.26	9.32	2.375	60.3	0.28	7.11
2‐7/8	10.4	9.72	14.48	2.875	73.0	0.362	9.19
3‐1/2	9.5	8.81	13.12	3.5	88.9	0.254	6.45
3‐1/2	13.3	12.31	18.34	3.5	88.9	0.368	9.35
3‐1/2	15.5	14.63	21.79	3.5	88.9	0.449	11.40
4	14	12.93	19.26	4	101.6	0.33	8.38
4‐1/2	13.75	12.24	18.23	4.5	114.3	0.271	6.88
4‐1/2	16.6	14.98	22.31	4.5	114.3	0.337	8.56
4‐1/2	20	18.69	27.84	4.5	114.3	0.43	10.92
5	16.25	14.87	22.15	5	127.0	0.296	7.52
5	19.5	17.93	26.71	5	127.0	0.362	9.19
5	25.6	24.03	35.79	5	127.0	0.5	12.70

Strength:

Group	Grade	Yield Strength				Tensile Strength
		Minimum		Maximum		Minimum
		Psi	Mpa	Psi	Mpa	Psi	Mpa
1	E-75	75000	517	105000	724	100000	689
2	X-95	95000	655	125000	862	105000	724
	G-105	105000	724	135000	931	115000	793
	S-135	135000	931	165000	1138	145000	1000

Packaging of API Oil Drilling Pipe/ Oil Well Drilling Pipe:

Standard Packaging：

Each drill pipe thread end is fitted with steel thread protector to guard threads against impact and scratches. Products are bundled with steel bands, fixed on fumigated heavy‑duty wooden pallets for ocean export. Waterproof PE film is wrapped outside the whole bundle against moisture during transit.

Shipping：

We support FCL sea freight and LCL sea freight based on order volume. Air freight and courier service are available for small‑volume spare parts only. Available trade terms include EXW, FOB, CIF. Other terms may be available upon request. Shipping costs are calculated according to total cargo weight, volume, destination port and selected transport mode.

Lead Time：

Samples: 7‑12 working days

Standard orders: 20‑30 working days

Customized orders: 30‑45 working days

Q1: What information do you need for a quotation of drill pipes?

A: We require outer diameter, wall thickness, steel grade, length range(R1/R2/R3), order quantity and destination port to prepare formal quotation.

Q2: What is the MOQ and production lead time?

A: MOQ is 20 metric tons. Standard order lead‑time is 20‑30 working days; customized orders take 30‑45 working days.

Q3: What quality standard do your drill pipes comply with?

A: Our drill pipes are manufactured and inspected in accordance with API 5DP standard.

Q4: How do I select proper drill‑pipe length grade for my project?

A: Choose R1 for shallow wells and workover jobs; R2 for most conventional on‑land drilling; R3 for deep‑well projects to reduce connection times.

Q5: What key parameters affect drill‑pipe service life under down‑hole conditions?

A: Working well temperature, drilling torque load, fluid medium and frequency of make‑and‑break operations directly determine its service life.

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API Oil Drilling Pipe/ Oil Well Drilling Pipe

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