Description
ELITE supplies heavy weight drill pipe for directional drilling, horizontal wells, extended-reach drilling and conventional oilfield bottom-hole assemblies. Available configurations include: Integral heavy weight drill pipe Spiral heavy weight drill pipe Standard center-upset HWDP Custom-length HWDP Hardbanded HWDP Internally coated HWDP Non-magnetic HWDP Request HWDP Specifications and Price: info@apidrillpipe.com Upload Existing Data Sheet or Purchase Order (WhatsApp +86 18615995257)
Which Configuration Do You Need?
Need excellent fatigue resistance for high-torque directional drilling? See our [Integral Heavy Weight Drill Pipe (HWDP) Technical Guide].
Looking specifically for 5-1/2″ integral heavy weight drill pipe? See [5-1/2″ Integral Heavy Weight Drill Pipe Specifications].
Need a 4″ HWDP with an NC40 connection? See [API 7-1 4″ NC40 Heavy Weight Drill Pipe].
Not sure which configuration is right for your drilling program? Send us your hole size and well trajectory, and we’ll recommend the appropriate configuration.
What Is Heavy Weight Drill Pipe (HWDP)?
Heavy Weight Drill Pipe is a special type of drill pipe designing to add weight to the drill bit while preserving the structural integrity of the drill string.
Position in Drill String: Between the drill pipe and drill collars.
Structure: Manufactured from premium alloy steel with upset connections.
Wall Thickness: Thicker than standard drill pipe, but lighter than drill collars.
Function: Reduces fatigue in the drill string and provides smoother weight transfer.
HEAVY WEIGHT DRILL PIPE TYPES
Different HWDP configurations are available according to the drilling program, well trajectory and wear conditions.
Standard HWDP
Standard Heavy Weight Drill Pipe provides additional weight and stiffness between conventional drill pipe and the heavier BHA components.It is commonly selecting for applications requiring a gradual transition in drill string stiffness.
Integral HWDP
Integral Heavy Weight Drill Pipe uses an integral body design with enlarged tool joint and center upset sections.
Selection should consider:
Body dimensions
Center upset geometry
Connection
Tool joint dimensions
Hardbanding
Drilling loads
Spiral HWDP
Spiral Heavy Weight Drill Pipe incorporates spiral wear features on the body or center section.It may be considering where reduced wall contact or specific wear-management requirements are important.
The final configuration should be confirmed according to the approving drilling program.
Oil Well Integral Heavy Weight Drill Pipe
Heavy Weight Drill Pipe (HWDP) is designing to provide a smooth transition between drill collars and drill pipe. It helps reduce stress concentration within the drill string and improves performance in directional, horizontal and extended-reach drilling applications.
Compared with drill collars, HWDP offers greater flexibility while maintaining sufficient weight for efficient drilling operations. This helps reduce torque, drag and cyclic fatigue loading on drill string connections.
ELITE HWDP is manufacturing from high-quality AISI 4145H modified alloy steel and undergoes controlling heat treatment to ensure consistent mechanical properties throughout the pipe body.
To improve wear resistance and extend service life, HWDP can be supplied with:
18° spiral center wear pads
90° center wear pads
Tungsten-carbide hardbanding
Internal plastic coating
Stress-relief features on tool joints
Customer-specified thread compounds and protectors
HWDP is widely used in directional wells, horizontal wells, extended-reach drilling (ERD) projects and other applications where improved drill string flexibility and durability are required.
Common Heavy Weight Drill Pipe Size We Supply
| Spec. | OD of pipe body (+1/16 -1/32) | ID of pipe body | OD of tool joint (+1/16 -1/32) | DF | ID of tool joint (+1/8, 0) | Connection | Maximum diameter of elevator upset Deu (0,-0.8mm) | Diameter od nominal upset (+1/16,-1/32 Deu) | Minimum diameter of drift |
|---|---|---|---|---|---|---|---|---|---|
| 3-1/2 | 3-1/2 | 2-1/4 | 4-3/4 (120.7) | 116.3 | 2-1/4 (57.2) | NC38 | 3-7/8 (98.42) | 4 | 2 |
| 3-1/2 | 3-1/2 | 2-1/16 | 4-3/4 (120.7) | 116.3 | 2-1/16 | NC38 | 3-7/8 (98.42) | 4 | 1-13/16 |
| 4 | 4 | 2-1/2 | 5-1/4 (133.4) | 127.4 | 2-1/2 | NC40 | 4-3/16 | 4-1/2 | 2-1/4 |
| 4 | 4 | 2-9/16 | 5-1/4 (133.4) | 127.4 | 2-9/16 (65.09) | NC40 | 4-3/16 | 4-1/2 | 2-5/16 |
| 4-1/2 | 4-1/2 | 2-11/16 | 6-1/4 | 145.3 | 2-11/16 | NC46 | 4-11/16 | 5 | 2-7/16 |
| 4-1/2 | 4-1/2 | 2-3/4 | 6-1/4 | 145.3 | 2-3/4 | NC46 | 4-11/16 | 5 | 2-1/2 |
| 4-1/2 | 4-1/2 | 2-13/16 | 6-1/4 | 145.3 | 2-13/16 | NC46 | 4-11/16 | 5 | 2-9/16 |
| 5 | 5 | 3 | 6-5/8 | 154 | 3 | NC50 | 5-1/8 | 5-1/2 | 2-3/4 |
| 5-1/2 | 5-1/2 | 3-1/4 | 7 (-1/4, 7-1/2) | 170.7 | 3-1/4 | 5-1/2FH | 5-11/16 | 6 | 3 |
| 5-1/2 | 5-1/2 | 3-3/8 | 7 (-1/4, 7-1/2) | 170.7 | 3-3/8 | 5-1/2FH | 5-11/16 | 6 | 3-1/8 |
| 5-1/2 | 5-1/2 | 3-7/8 | 7 (-1/4, 7-1/2) | 170.7 | 3-7/8 | 5-1/2FH | 5-11/16 | 6 | 3-5/8 |
| 5-1/2 | 5-1/2 | 4 | 7 (-1/4, 7-1/2) | 170.7 | 4 | 5-1/2FH | 5-11/16 | 6 | 3-3/4 |
| 6-5/8 | 6-5/8 | 4 | 8 (8-1/4, 8-1/2) | 195.7 | 4 | 6-5/8FH | 6-15/16 | 7-1/8 | 3-3/4 |
| 6-5/8 | 6-5/8 | 4-1/2 | 8 (8-1/4, 8-1/2) | 195.7 | 4-1/2 | 6-5/8FH | 6-15/16 | 7-1/8 | 4-1/4 |
| 6-5/8 | 6-5/8 | 5 | 8 (8-1/4, 8-1/2) | 195.7 | 5 | 6-5/8FH | 6-15/16 | 7-1/8 | 4-3/4 |
Integral HWDP Versus Welded HWDP
Integral HWDP
Integral HWDP is manufactured as a continuous heavy-wall body with integral tool joint and center-upset sections.It is commonly selected where fatigue resistance and structural continuity are important.
Welded HWDP
Some HWDP designs may use separately manufactured sections or welded components.
When welded construction is offered, the supplier should clearly state:Weld location,Welding process,Heat treatment,Weld inspection,Hardness control,Traceability,Applicable acceptance criteria.
Standard HWDP Versus Spiral HWDP
Select Standard HWDP When
A conventional center-upset configuration meets the BHA requirement.The sticking risk is relatively controlled,A simpler external profile is preferred,Lower machining cost is important.
Select Spiral HWDP When
The drilling program has a higher differential-sticking concern.Reduced wall-contact area is required.The well is directional or highly deviating.The drilling engineer specifies a spiral configuration.Spiral HWDP should not be selected only because it appears more advancing.The groove design must preserve sufficient section strength and wear allowance.
Heavy Weight Drill Pipe Basic Information
| Product Name | API 7-1 standard HWDP/AISI 4145H Integral Heavy Weight Drill Pipe drill pipe 5 1/2 in oil and gas well drilling with hardfacing and coating | |
| Standard | API 7-1 | |
| Grade | Drill Pipe Body | PSL.1: E, X, G, S / PSL.2: G, S |
| Tool Joint | PSL.1, PSL.2, PSL.3 | |
| Minimum Order Quantity | 10 Ton | |
| Outside Diameter Ranges | 23/8 inch to 65/8 inch | |
| Wall Thickness | 6.45mm to 12.70mm | |
| Length | R1: 6.10-7.01m / R2: 8.84-9.75m / R3: 12.19-13.72 | |
| Type | Seamless / Welded | |
| Upset Style | IU, EU, IEU | |
| Rotary Shouldered Connection Style | NC40, NC46, NC26, NC31, NC38, NC50, 51/2FH, 65/8FH | |
| Outside Diameter, in. |
Inside Diameter, in. |
Connection | Tool Joint OD , in. |
Tool Joint ID , in. |
Center Upset Diameter, in. |
Central upset dia (in) | Min. drift dia. size (in) |
| 3-1/2 | 2-1/4 | NC38 | 4-3/4 (4-7/8, 5) | 2-1/4 | 4 | 4 | 2 |
| 2-1/16 | 2-1/16 | 1 13/16 | |||||
| 4 | 2-1/2 | NC40 | 5-1/4 | 2-1/2 | 4-1/2 | 4 1/2 | 2 1/4 |
| 2-9/16 | 2-9/16 | 2 5/16 | |||||
| 4-1/2 | 2-11/16 | NC46 | 6-1/4 | 2-11/16 | 5 | 5 | 2 7/16 |
| 2-3/4 | 2-3/4 | 2 1/2 | |||||
| 2-13/16 | 2-13/16 | 2 9/16 | |||||
| 5 | 3 | NC50 | 6-5/8 | 3 | 5-1/2 | 5 1/2 | 2 3/4 |
| 5-1/2 | 3-1/4 | 5-1/2FH | 7 (7-1/4, 7-1/2) | 3-1/4 | 6 | 6 | 3 |
| 3-3/8 | 3-3/8 | 3 1/8 | |||||
| 3-7/8 | 3-7/8 | 3 5/8 | |||||
| 4 | 4 | 3 3/4 | |||||
| 6-5/8 | 4 | 6-5/8FH | 8 (8-1/4, 8-1/2) | 4 | 7-1/8 | 7 1/8 | 3 3/4 |
| 4-1/2 | 4-1/2 | 4 1/4 | |||||
| 5 | 5 | 4 3/4 |
Request HWDP Specifications and Price: info@apidrillpipe.com
Key Functions of ELITE Heavy Weight Drill Pipe
Smooth Transition – Minimizes stress between drill pipe and drill collars.
Directional Drilling Support – Provides flexibility required in deviated or horizontal wells.
Weight-on-Bit Control – Adds necessary downforce to the bit without compromising drill pipe integrity.
Vibration Reduction – Helps mitigate drill string fatigue by absorbing torsional and axial loads.
Extended Service Life – Prevents premature failures in drill pipes.
How to maintain the heavy weight drill pipe and extend its service life？
Thread Protection – Always use protectors during handling.
Regular Inspection – Look for cracks, washouts, or fatigue signs.
Proper Handling – Avoid dropping or striking during rig operations.
Torque Management – Follow recommended make-up torque.
Hardbanding – Apply to reduce wear in abrasive formations.
ELITE heavy weight drill pipe – FAQ
Q1: How much does 5-inch HWDP weigh?
A: The weight of 5-inch Heavy Weight Drill Pipe depends on the pipe body ID, tool joint dimensions, center upset design, connection type and overall length.
Different manufacturers may supply different configurations. For accurate weight calculations, please provide the required OD, ID, connection and length. Our engineering team can provide the theoretical weight and complete dimensional data sheet.
Q2: Can HWDP be supplied with hardbanding?
A: Yes.The hardbanding brand, location, band dimensions and casing-friendly requirement should be stating in the RFQ.
Q3: Can HWDP be supplied with internal coating?
A: Yes. Internal plastic coating (IPC) can be applied according to customer specifications.
Internal coating may help reduce internal corrosion, improve flow efficiency and extend service life when drilling with corrosive drilling fluids.
Please specify:Coating type,Service environment,Inspection requirements,Operating temperature.
Q4: What inspection documents are available?
A: Available documents may include MTC, mechanical-property reports, UT, MPI, dimensional inspection, thread inspection, hardbanding reports and traceability records.
Q5: What information is required for price?
A: Provide the OD, ID, length, connection, center upset, hardbanding, quantity, inspection scope and destination.
Q6: What is the benefit of ordering Spiral Heavy Weight Drill Pipe?
A: Spiral HWDP features machined helical grooves that reduce wall contact area against the formation by up to 40%. This significantly lowers the risk of differential pressure sticking in high-angle wellbores while allowing efficient mud circulation around the pipe body.
Request API 7-1 HWDP Factory Direct Quote & Specification PDF
Evaluating tubular inventory or preparing a tender for an upcoming drilling campaign?
API Spec 7-1 Monogram Certified & ISO 9001 Facility
In-Stock Popular Sizes: 3 1/2″, 4 1/2″, 5″ HWDP Range 2
Custom Options: Arnco 100XT Hardbanding, Internal Coatings, Custom Threads
Third-Party Inspection Supported: SGS, Bureau Veritas (BV), Intertek, Lloyd’s
Contact our tubular supply chain team today for an official quote
Email: info@apidrillpipe.com
