3 1/8" Drill Pipe Plastic Thread Protectors/plastic thread end Cap
3-1/8 Inch Reference PP Drill Pipe Thread End Protectors
This PP thread end protector listing carries a 3-1/8 inch size reference for drill pipe enquiries. Confirm what that dimension identifies on the connection drawing before ordering: a pipe, tool joint or protector dimension must not be assumed from the label alone. The protector is intended to cover a matching threaded end during transport and storage, with pin or box geometry specified separately.
Ordering specification: 3-1/8 inch reference; polypropylene (PP) material; black or an agreed color. Provide the full drill pipe connection designation, drawing revision, engagement length and required coverage. NC26, NC38, NC50 and REG references describe other connection enquiries; BTC, STC and LTC casing references and the broad 2-3/8 to 20 inch range do not establish this protector fit. Confirm each variant against its own drawing.
Packaging & Shipping
| Port: | Shanghai |
| MOQ: | 1000 pcs,Custom parts: 5000pcs |
| Packing: | bulk packing or custom packing |
| Payment: | Payment method to be agreed in the quotation. |
| Delivery time: | Delivery schedule to be agreed after dimension review, quantity and sample approval. |
Other oil and gas industry accessories for choice:
Our company
Shanghai Qinuo supplies molded plastic components and oilfield accessories. For this 3-1/8 inch reference item, send the intended pipe-end drawing and identify the dimension represented by the size label.
Review the PP protector against the actual connection geometry. Confirm starting engagement, seating, removal and clearance around adjacent surfaces before accepting a production sample.
Custom tooling, molded dimensions and identification marks should follow the approved drawing. State the PP grade and intended storage exposure when requesting the sample.
ISO 9001 applies to the quality management system. Connection compatibility and any requested impact or environmental performance should be specified and checked for the ordered design.
FAQ
1. Is 3-1/8 inch enough to identify the correct protector?
No. A size reference does not identify thread form, end orientation or engagement geometry.
Mark the 3-1/8 inch dimension on the drawing and supply the full connection designation so the corresponding protector can be reviewed.
2. Which details should accompany a quotation request?
a. Meaning of the 3-1/8 inch dimension and its drawing tolerance.
b. Full connection designation and drawing revision.
c. Pin or box end, with separate quantities where both are required.
d. Thread engagement, seating position and body clearance.
e. Required coverage of the thread and adjacent surfaces.
f. PP grade, color and storage conditions.
g. Sample fit checks, markings and packing by connection.
3. How should an end cap sample be assessed?
1. Compare critical dimensions with the approved drawing.
2. Start engagement on the matching pipe end without forcing it.
3. Verify seating and the required protected area.
4. Check removal and inspect the engagement surfaces.
5. Define any impact, retention or ingress test separately where needed.
4. Can the protector be used as a sealed closure?
1. Confirm whether the approved design covers only threads or also the opening.
2. Opening coverage alone does not establish a fluid-tight seal.
3. Specify any sealing requirement and test method separately.
4. Keep handling protectors separate from pressure-rated closures.
5. Inspect for damage, contamination and loose fit before reuse.
Other pipe sizes and oilfield accessories require their own dimension and connection review.
Send the marked 3-1/8 inch reference drawing, connection details and required quantity for a PP protector quotation.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.