3 1/8" , 2 3/8" Drill Pipe Plastic Thread Protectors/end Cap
Drill Pipe Plastic Thread Protectors and End Caps — Connection Fit for 3-1/8 and 2-3/8-Inch References
Plastic thread protectors cover drill-pipe connections during transportation and storage. This listing uses 3-1/8 and 2-3/8-inch references; confirm whether each refers to the pipe body, tool joint or protector dimension before choosing a cap. A threaded protector and a slip-on end cap need different mating details. Specify the connection and end orientation for each item rather than ordering by diameter alone.
Size references: 3-1/8 inch (3.125 inches) and 2-3/8 inch (2.375 inches). Connection designation, thread profile, engagement length and pin or box end must be defined on the approved drawing. NC and REG designations are separate connection references; BTC, STC and LTC casing references do not establish drill-pipe compatibility.
Drill-Pipe Connection and Cap Selection:
1. Identify the protected component: pipe body end or tool-joint connection.
2. Specify storage temperature, sunlight exposure and transport conditions for resin selection.
3. Plastic construction; specify any metal reinforcement separately when required.
4. Mark the connection designation and part number according to approved identification requirements.
5. Define threaded installation or slip-on retention before reviewing the sample.
6. Provide the exact connection drawing; nominal size alone is insufficient.
7. Define coverage of the thread and shoulder without unwanted contact with sealing surfaces.
8. Review pin-end and box-end protectors as separate mating configurations.
9. Agree impact and retention test methods and acceptance criteria when these are required.
10. Inspect for cracks, distortion and damaged engagement surfaces before reuse.
11. Label each connection configuration separately to prevent selection errors.
Packaging & Shipping
| Port: | Shanghai |
| MOQ: | 1000 pcs,Custom parts: 5000pcs |
| Packing: | bulk packing or custom packing |
| Payment: | PayPal, T/T, Western Union, L/C |
| Delivery time: | Depend on the quantity |
Other oil and gas industry accessories for choice:
Our company
Shanghai Qinuo Industry Co. Ltd provides custom plastic-part enquiries. For drill-pipe protectors, send the connection drawing, the meaning of each size reference and the required end orientation.
OEM and ODM enquiries can include threaded protectors or slip-on caps. State the intended retention method and protected surfaces so the proposed geometry can be reviewed against the mating part.
Tooling and sample requirements depend on the resin, geometry and order configuration. Confirm the manufacturing route, trial-fit plan and delivery schedule during quotation.
ISO 9001 quality management applies. Product-specific inspection, material documentation and test requirements should be agreed for the selected protector configuration.
FAQ
1. Can a 2-3/8-inch cap fit any 2-3/8-inch drill pipe?
No. A size label does not define the tool-joint connection, thread or cap retention dimensions.
Provide a dimensioned drawing or mating sample and identify what the size label measures.
2. What information distinguishes a threaded protector from an end cap?
a. State whether the cap screws onto the connection or slides over the end.
b. Identify the male pin or female box end and the protected thread or shoulder.
c. Supply the mating profile, tolerances and required engagement or insertion depth.
d. Define retention and removal requirements.
e. Specify openings or drainage features if needed.
f. Identify resin and environmental requirements.
g. Approve the sample on the actual mating component before repeat production.
3. How should the two size references be ordered?
1. Create a separate drawing and part number for each configuration.
2. Record whether the size describes pipe, tool joint or protector.
3. List the connection designation and end orientation.
4. Assign quantity, colour and identification requirements to each part number.
5. Review each sample independently rather than assuming interchangeability.
4. What should be checked at receiving inspection?
1. Match labels and part numbers to the order.
2. Check molding defects and dimensional acceptance criteria.
3. Verify engagement or insertion on the approved mating component.
4. Check thread and shoulder coverage against the drawing.
5. Keep approved samples and drawings for repeat-order reference.
Related oilfield accessories should be selected by their own mating dimensions and operating requirements.
Send the drill-pipe connection drawing or original sample with the required protector quantity for configuration review.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.