The drill pipe with upset is manufactured through a forging process where the tube ends are made with thicker walls. The process starts by heating the ends of the tube, followed by pressure application utilizing a closed die hydraulic forging press, which will create the upsets.
An external upset part with an outer taper is formed on one end of the steel tube through upsetting and pressing. Internal upset forging may then be initiated by displacing the outer taper to an internal upset part with an internal taper. This is done by pressing the external upset portion. An internal upset die can deliver the final part of the internal upset forging process.
Not all drill pipes are upset. This is secondary to the expenses required to successfully produce drill pipe with upset.
The Tool joints of the drill pipe are the enlarged and threaded ends of drill pipe joints. Drill pipe with tool joints and the pipe body are produced separately and are welded in the end. These are made to tolerate severe working conditions of drilling, delivering connections with high-strength and high-pressure threads.
Drill Pipe with Upset and Tool Joint Types
Drill pipe with tool joints can be determined by their configuration or upset on both ends. The upset of the drill pipe allows welding of the tool joints and can be categorized as:
- Internal Upset (IU): The drill pipe’s internal diameter is decreased and the outer diameter is maintained in a drill pipe with internal upset.
- External Upset (EU): Extra wall thickness is achieved with the drill pipe with external upset by increasing the outer diameter while maintaining the internal diameter at constant.
- Internal-External Upset (IEU): The inside diameter of a drill pipe with internal-external upset is decreased and its outside diameter increased.
Drill Pipe with Upset and Tool Joint Advantages
Drill pipe with upset provides three key advantages: (1) presence of a thicker and sturdier weld area; (2) better transition from harder tool joints to more flexible pipes; and (3) stressed areas being kept away from the weld region.
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Drill Pipe Specification with Upset and Tool Joint Chart
| OD (in) | Nom. Wt (lb/ft) | Upset | Grade | Wall Thkns (in) | ID (in) | TJ Conn Type | TJ OD (in) | TJ ID (in) | TJ Pin Tong Space (in) | TJ Box Tong Space (in) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| wdt_ID | OD (in) | Nom. Wt (lb/ft) | Upset | Grade | Wall Thkns (in) | ID (in) | TJ Conn Type | TJ OD (in) | TJ ID (in) | TJ Pin Tong Space (in) | TJ Box Tong Space (in) |
| 1 | 2-3/8 | 6.65 | EU | E-75 | 0.28 | 1.815 | NC26 | 3-3/8 | 1-3/4 | 9 | 10 |
| 2 | X-95 | 0.28 | 1.815 | NC26 | 3-3/8 | 1-3/4 | 9 | 10 | |||
| 3 | G-105 | 0.28 | 1.815 | NC26 | 3-3/8 | 1-3/4 | 9 | 10 | |||
| 4 | S-135 | 0.28 | 1.815 | NC26 | 3-5/8 | 1-3/4 | 9 | 10 | |||
| 5 | 2-7/8 | 10.4 | EU | E-75 | 0.362 | 2.151 | NC31 | 4-1/8 | 2-1/8 | 9 | 11 |
| 6 | X-95 | 0.362 | 2.151 | NC31 | 4-1/8 | 2 | 9 | 11 | |||
| 7 | G-105 | 0.362 | 2.151 | NC31 | 4-1/8 | 2 | 9 | 11 | |||
| 8 | S-135 | 0.362 | 2.151 | NC31 | 4-3/8 | 1-5/8 | 9 | 11 | |||
| 9 | 3-1/2 | 13.3 | EU | E-75 | 0.368 | 2.764 | NC38 | 4-3/4 | 2-11/16 | 10 | 12-1/2 |
| 10 | X-95 | 0.368 | 2.764 | NC38 | 5 | 2-9/16 | 10 | 12-1/2 |
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Drill Pipe Specification with Upset and Tool Joint Chart
| OD (in) | Nom. Wt (lb/ft) | Upset | Grade | Wall Thkns (in) | ID (in) | TJ Conn Type | TJ OD (in) | TJ ID (in) | TJ Pin Tong Space (in) | TJ Box Tong Space (in) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| wdt_ID | OD (in) | Nom. Wt (lb/ft) | Upset | Grade | Wall Thkns (in) | ID (in) | TJ Conn Type | TJ OD (in) | TJ ID (in) | TJ Pin Tong Space (in) | TJ Box Tong Space (in) |
| 1 | 2-3/8 | 6.65 | EU | E-75 | 0.28 | 1.815 | NC26 | 3-3/8 | 1-3/4 | 9 | 10 |
| 2 | X-95 | 0.28 | 1.815 | NC26 | 3-3/8 | 1-3/4 | 9 | 10 | |||
| 3 | G-105 | 0.28 | 1.815 | NC26 | 3-3/8 | 1-3/4 | 9 | 10 | |||
| 4 | S-135 | 0.28 | 1.815 | NC26 | 3-5/8 | 1-3/4 | 9 | 10 | |||
| 5 | 2-7/8 | 10.4 | EU | E-75 | 0.362 | 2.151 | NC31 | 4-1/8 | 2-1/8 | 9 | 11 |
| 6 | X-95 | 0.362 | 2.151 | NC31 | 4-1/8 | 2 | 9 | 11 | |||
| 7 | G-105 | 0.362 | 2.151 | NC31 | 4-1/8 | 2 | 9 | 11 | |||
| 8 | S-135 | 0.362 | 2.151 | NC31 | 4-3/8 | 1-5/8 | 9 | 11 | |||
| 9 | 3-1/2 | 13.3 | EU | E-75 | 0.368 | 2.764 | NC38 | 4-3/4 | 2-11/16 | 10 | 12-1/2 |
| 10 | X-95 | 0.368 | 2.764 | NC38 | 5 | 2-9/16 | 10 | 12-1/2 |
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Drill Pipe Specification with Upset and Tool Joint Chart Abbreviations:
- OD – Outside Diameter
- ID – Inside Diameter
- Nom. Wt – Nominal Weight
- Wall Thkns – Wall Thickness
- TJ – Tool Joint
The drill pipe specifications with upset and tool joints provides data on the pipe body and tool joints.
The pipe body details include:
- Size OD (outer diameter) in inches
- Nominal weight in lb/ft
- Upset Type (IU, EU, IEU)
- Grade which shows the kind of steel, tensile strength, and yield strength
- Wall Thickness in inches
- Inner diameter (ID) in inches
The tool joint details include:
- Connection type or portion of the piping system where joints connect the pipe
- Outer and inner diameter configurations
- Pin Tong and Box Tong space, which is a usable tong space for pin and box tool joints
Go here if you are looking for the Drill Rod Thread Compatibility Chart.
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