Drill Pipes

Drill pipe is one of the most critical downhole OCTG (Oil Country Tubular Goods) equipment widely used in onshore and offshore oil and gas drilling, well cementing, workover and completion operations. As the main connecting component of the entire drill string system, it serves as a transmission channel for drilling fluid, torque, pressure and weight during all drilling processes. High-quality drill pipe directly determines drilling safety, operational efficiency and overall well service life, especially for deep well, ultra-deep well, directional well and high-pressure high-temperature oilfie...

Inquiry

E-mail：candice@cnsanmon.com

Detailed Description
Product Encyclopedia

1. Product Overview

Drill Pipe is one of the most critical downhole OCTG (Oil Country Tubular Goods) equipment widely used in onshore and offshore oil and gas drilling, well cementing, workover and completion operations. As the main connecting component of the entire Drill String system, it serves as a transmission channel for drilling fluid, torque, pressure and weight during all drilling processes. High-quality drill pipe directly determines drilling safety, operational efficiency and overall well service life, especially for deep well, ultra-deep well, directional well and high-pressure high-temperature oilfield working conditions.

Manufactured from high-strength alloy steel materials, our drill pipes strictly comply with API 5DP international standards and cover all mainstream steel grades including E75, X95, G105 and S135. Each pipe body adopts integral quenching and tempering heat treatment to achieve uniform mechanical performance, high tensile strength, excellent torsion resistance and strong collapse resistance. The pipe ends are precisely friction-welded with heavy-duty tool joints, followed by multi-stage CNC threading, precise taper control and anti-galling treatment, ensuring stable connection, repeated make-and-break performance and outstanding airtightness under long-term downhole complex loads.

Our drill pipe products are suitable for various harsh working environments, including deepwater offshore drilling, desert oilfields, high-sulfur reservoirs and high-pressure stratum conditions. The outer surface adopts professional anti-corrosion coating treatment, while the inner wall is polished and protected by special anti-abrasion coating to reduce erosion caused by high-speed drilling fluid and prolong service life. All products support high mud circulation flow rate, high torque rotation and long-distance tripping operations, effectively reducing drilling failure risks and improving overall drilling efficiency. Widely matched with drilling rigs, semi-submersible platforms and onshore drilling teams, our drill pipes have become reliable supporting equipment for global oil and gas exploration and development projects.

2. Technical Specifications (Parameter Table)

Parameter Item	Technical Standard & Data
Executive Standard	API 5DP, ISO 9001, CE Certification
Steel Grade	E75, X95, G105, S135
Common Outer Diameter	2-3/8”, 2-7/8”, 3-1/2”, 4”, 4-1/2”, 5”, 5-1/2”
Pipe Body Length	R1 (6.10m), R2 (9.14m), R3 (12.20m)
Thread Type	API NC, IF, FH, VAM customized threads
Heat Treatment	Integral quenching & tempering
Surface Treatment	External anti-corrosion coating, internal anti-abrasion polishing
Working Pressure Level	Suitable for medium and high pressure deep well operation
Application Scenarios	Onshore & offshore drilling, well completion, workover, fishing operation

3. Company Profile

Sanmen Machinery Co., Ltd. is a professional manufacturer and global exporter of full-series oilfield equipment, focusing on R&D, customized design, precision manufacturing and one-stop supporting services for petroleum machinery. With more than 18 years of industry experience, the company has been committed to providing standardized and customized OCTG products, Downhole Tools and oilfield system solutions for global oil and gas operators.

Our factory is equipped with professional pipe production lines, heat treatment equipment, CNC threading machines, precision testing instruments and non-destructive testing systems. Every drill pipe undergoes strict raw material inspection, mechanical performance testing, thread precision detection, pressure resistance testing and appearance quality inspection before delivery. We fully implement API Standard production procedures to ensure stable quality, high connection accuracy and excellent downhole adaptability of each product.

Adhering to the factory direct sales model, we avoid intermediate links and provide cost-effective and high-reliability drill pipe products. We support personalized customization of steel grade, size, thread type and surface treatment according to customer well conditions. Our products have been exported to more than 30 countries and regions in the Middle East, Southeast Asia, Africa and South America, winning long-term trust and stable cooperation from global clients with reliable quality, flexible customization and timely delivery.

Frequently Asked Questions (FAQ)

Q1: What is the difference between different steel grades of Drill Pipes?

A1: E75 is suitable for conventional shallow and medium wells with low cost and stable performance. X95 and G105 are widely used in medium-deep wells with better torsion and tension performance. S135 is high-strength grade specially designed for deep wells, ultra-deep wells and complex offshore well conditions, featuring higher load capacity and stronger fatigue resistance.

Q2: Can you provide customized drill pipe specifications?

A2: Yes. We support customized outer diameter, wall thickness, pipe length, thread standard and special anti-corrosion treatment according to customer’s actual drilling depth, stratum pressure, temperature and regional oilfield standards.

Q3: What quality tests are performed before delivery?

A3: All drill pipes pass chemical composition analysis, tensile test, impact test, hardness test, NDT flaw detection, thread precision inspection and pressure resistance test. Complete API inspection reports and certification documents can be provided for export customs clearance and project acceptance.

Q4: What is your delivery time?

A4: Standard conventional models have sufficient stock and can be delivered quickly. For customized sizes and special grades, the production cycle is 15–25 working days according to order quantity.

Q5: Do you provide after-sales technical support?

A5: We provide professional technical consultation for pipe selection, matching suggestions for different well conditions, and long-term after-sales service. We can also supply supporting drill pipe accessories and quick replacement parts globally.