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Oil production equipment at drilling site

Home Products Drilling Tools Drilling TubularsDrill Pipe

Drill Pipe – The Ultimate Solution for Deep Well Challenges: High Efficiency, Durability & Cost Savings

We specialize in supplying API standard oil drill pipes manufactured from premium alloy steel through advanced heat treatment processes. Our products deliver ultra-high tensile strength, superior fatigue resistance, and excellent corrosion resistance. Widely used in deep wells, ultra-deep wells, and complex formations, our drill pipes significantly enhance ROP (Rate of Penetration) while reducing fracture risks. With a proven track record in over 300 drilling projects worldwide, we offer technical expertise support and customized solutions, making us your reliable drill pipe partner.

Type

Kelly Drill Pipe
Drill Pipe
Heavy Weight Drill Pipe

Kelly Drill Pipe

As the driving component of the entire drill string in rotary drilling systems, the kelly drill pipe connects with the square bushing and rotary bushing to transmit torsional energy from the rotary table to the drill bit at the bottom of the well. They are available in both square Kelly and hexagonal Kelly types, and are manufactured in accordance with API Spec 7-1 and SY/T 6509-2000 standards.

Our square Kellys and hexagonal Kellys are made from AISI 4145H modified alloy bars and undergo full-length quenching and tempering. After this heat treatment, their Brinell hardness reaches 285-341. The ends, drive sections, and connections of the Kelly drill pipe are all machined and tested in accordance with API Standard.

Drill Pipe

Drill pipe is a critical part of the drilling rig, primarily functioning to facilitate drilling fluid circulation to the bit and back to surface, minimizing friction and heat buildup. The drill pipe also transmits drilling torque to the drill bit, enabling downhole drilling operations. Designed to withstand complex loading conditions, including tension, load, pressure, torsion, and bending, our drill pipes are manufactured from standard API steel grades, meeting diverse drilling application requirements.

Heavy Weight Drill Pipe

Heavy weight drill pipe serves as a transitional tool between regular drill pipe and heavier drill collars. It is also referred to as 'Hevi-Wate' or 'HWDP' in the industry.

In vertical well sections, HWDP is the most commonly used drill pipe. It delivers weight to the drill bit for directional drilling while offering greater flexibility than drill collars; in certain applications, it can replace drill collars entirely.

Manufactured to API Spec 7-1 standards, we supply both welded-type and integral-type HWDP.

Heavy weight drill pipe on a white background

Advantages

01

High Strength & Toughness

Produced using proprietary chemical composition and strictly controlled quenching and tempering heat treatment processes.

02

Reduced Hook Load

High-strength drill pipe reduces drill string weight, in turn reducing torque and drag.

03

Enhanced Hydraulic Performance

Reduced wall thickness can enlarge the pipe’s inner diameter, thereby enhancing hydraulic performance.

04

Proven Reliability

Over 1 million feet of high-strength, high-toughness drill pipe sold worldwide.

Specifications

Outer Diameter: Common 2-3/8" – 6-5/8"
Inner Diameter: Impacts hydraulic performance
Length: R1/R2/R3 series, single length 8–12 m
Connection Type: NC26 to NC76, REG, etc.
Upset Type: IU / EU / IUEU
Steel Grade: API Standard: E75 / X95 / G105 / S135, or non-standard specialty steel
Yield Strength: ≥ 758 MPa for S135 grade
Charpy Impact Energy: ≥ 54J at -20 °C
Weight Tolerance: API Standard ±2.5%
Certification System: API 5DP / 7-1 Certification; ISO 9001 / 14001, etc.

Applications

Our API Standard drill pipes (E75/X95/G105 grades) are suitable for conventional rotary drilling that are typically used for medium-depth wells ranging from 3,000 to 7,000 meters.
For directional drilling applications, we offer high-torque drill pipes (e.g. S135 ultra-high strength grade), thickened tool joints (for enhanced fatigue resistance), and low-friction coatings, all of which have demonstrated excellent field performance.
For underbalanced drilling, we provide composite drill pipe strings along with anti-sulfur drill pipes to meet the complex conditions within underbalanced wells.
For special applications such as polar drilling, offshore drilling, and shale gas development, we offer customized design and manufacturing.

Download

Please download our PDF files to obtain more detailed specifications and dimensions of our products.

Drill Pipes PDF