Heavy Weight Drill Pipe 3 1/2”, 26.10 Lb ft, Connection NC-38
A Heavy Weight Drill Pipe (HWDP) looks like a normal drill pipe
except for an upset centered along the tube which helps to prevent
excessive buckling.
HWDP is used as a transitional stiffness section, typically between
the stiff and rigid drill collars and the relatively light and
flexible drill pipe joints to reduce fatigue failures directly
above the bottom hole assembly.
Standard HWDP was developed to provide a gradual transition from
heavy drill collars to relatively lightweight drill pipe.
This intermediate-weight pipe has a wall thickness of approximately
1 in. and helps prevent stress concentration at the top of the
drill collar section. Heavy weight drill pipe also enables drilling
at higher RPMs, reducing torque and differential pressure sticking.
Heavy weight drill pipe is well-suited for directional drilling
applications. Because it bends easily, heavy weight drill pipe
simplifies directional control and minimizes connection fatigue
problems that are common in high-angle or horizontal drilling.
For extended reach and horizontal wells, high-strength heavy weight
drill pipe is often used high in the hole to apply weight on the
bit. This is especially true for wells in which the total vertical
depth to total measured depth ratio is low.
| Nominal Size (Tube OD) | Tube | Tool Joint (in) |
| | ID (in) | Elevator Upset | Center Upset | Connection Type & Size | OD (in) | ID (in) |
| 2-7/8 | 1-1/2 | 2-15/16 | 3-5/16 | NC 26 (2-3/8 IF) | 3-3/8 | 1-1/2 |
| 3-1/2 | 2-1/16 | 3-7/8 | 4 | NC 38 (3-1/2 IF) | 4-3/4 (4-7/8,5) | 2-1/16 |
| 3-1/2 | 2-1/4 | 3-7/8 | 4 | NC 38 (3-1/2 IF) | 4-3/4 (4-7/8,5) | 2-1/4 |
| 4 | 2-9/16 | 4-3/16 | 4-1/2 | NC 40 (4FH) | 5-1/4 | 2-9/16 |
| 4 | 2-1/2 | 4-3/16 | 4-1/2 | NC 40 (4 FH) | 5-1/4 | 2-1/2 |
| 4-1/2 | 2-3/4 | 4-11/16 | 5 | NC 46 (4 IF) | 6-1/4 | 2-3/4 |
| 4-1/2 | 2-11/16 | 4-11/16 | 5 | NC 46 (4 IF) | 6-1/4 | 2-11/16 |
| 4-1/2 | 2-13/16 | 4-11/16 | 5 | NC 46 (4 IF) | 6-1/4 | 2-13/16 |
| 5 | 3 | 5-1/8 | 5-1/2 | NC 50 (4-1/2 IF) | 6-5/8 | 3 |
| 5-1/2 | 3-1/4 | 5-11/16 | 6 | 5-1/2 FH | 7 (7-1/4,7-1/2) | 3-1/4 |
| 5-1/2 | 3-3/8 | 5-11/16 | 6 | 5-1/2 FH | 7 (7-1/4,7-1/2) | 3-3/8 |
| 5-1/2 | 3-7/8 | 5-11/16 | 6 | 5-1/2 FH | 7 (7-1/4,7-1/2) | 3-7/8 |
| 5-1/2 | 4 | 5-11/16 | 6 | 5-1/2 FH | 7 (7-1/4,7-1/2) | 4 |
| 6-5/8 | 4 | 6-15/16 | 7-1/8 | 6-5/8 FH | 8 (8-1/4,8-1/2) | 4 |
| 6-5/8 | 4-1/2 | 6-15/16 | 7-1/8 | 6-5/8 FH | 8 (8-1/4,8-1/2) | 4-1/2 |
| 6-5/8 | 5 | 6-15/16 | 7-1/8 | 6-5/8 FH | 8 (8-1/4,8-1/2) | 5 |
| Standard Features | API Bore Back Box Connection |
| API Stress Relief Grooved Pin |
| Cold Rolled Thread Roots |
| Phosphate coated connections |
| Options | Internal Plastic Coating |
| Hardband Type especially on box and pin tool joint |
| Proprietary Connections |
| Make and Break Test |
| Protection | Pressed steel thread protectors |
| Mill Test Certificates | Issued in accordance with API Spec 7/7-1 and API RP7G . |
| Third Party Inspection can be performed on request at buyer’s care
and expense. |
Connection technologies
As the leader in the development of rotary-shouldered connections,
our products are engineered to optimize drill pipe performance.
With four generations of double-shouldered connections, we have
developed technologies to meet the demands of any drilling
challenge.
Grade technologies
ROSCHEN’s purposefully engineered drill pipe material grades
provide increased product performance and integrity. Our
high-strength grades help you drill safer and deeper with reduced
hook loads and improved hydraulics. Our sour service grades deliver
outstanding performance while resisting sulfide stress cracking
(SSC), helping you drill safely and efficiently in harsh, sour
conditions.
Custom-engineered products
In addition to a complete line of drill stem products and
accessories, we design, engineer, qualify, and produce
fit-for-purpose solutions for specialized or unusually demanding
drilling, completion, and intervention operations. With our
portfolio of projects developed in partnership with operators, we
are the premier provider of customized drilling solutions.
For more information please contact:
Skype: ROSCHEN.TOOL , ROSCHEN_GROUP
WeChat: +86-137 6419 5009 ; +86-135 8585 5390
WhatsApp: +86-137 6419 5009 ; +86-135 8585 5390
Email: roschen@roschen.com ; roschen@roschen.net
Website: http://www.roschen.com ; http://www.roschen.net
