Size, nominal mass, wall thickness, grade and delivery condition.
OCTG COMPONENTS
Couplings & Pup Joints
Matching components for casing and tubing strings, supplied to the required grade, dimensions and connection.
StandardAPI 5CT · ISO 11960
Size / supply rangeCasing and tubing coupling sizes coordinated to the parent pipe · Pup-joint length, OD, ID and drift confirmed by order
Grades / materialsGrades matched to casing or tubing requirement · Special-service and CRA options subject to review
Connections / optionsSTC / LTC / BTC · NUE / EUE
MATCHING OCTG COMPONENTS
Connection compatibility and controlled length adjustment.
Couplings join threaded casing and tubing, while pup joints provide shorter controlled lengths for spacing, landing and string adjustment. Both must match the parent tubular in size, grade, connection geometry, service condition and inspection basis.
OAK PIPE coordinates these components with the casing or tubing order so that material identity, thread inspection, protection, marking and documentation remain traceable across the complete package.
API or approved special thread, coupling geometry and clearance.
Length, quantity, surface, protectors, gauging and traceability.
RECORDED PRODUCT RANGE
Coupling families transcribed from OAK source tables.
The ranges below support enquiry preparation. Final dimensions, tolerances, calculated mass and compatibility are confirmed against the applicable API edition and ordered pipe combination.
| Product family | Recorded nominal range | Source fields retained |
|---|---|---|
| API round-thread casing couplings | 4½–20 in | OD, minimum length, bore / recess dimensions, bearing-face geometry, tolerances and calculated mass |
| API buttress-thread casing couplings | 4½–20 in | Standard and special-clearance OD, minimum length, bore / recess dimensions, tolerances and calculated mass |
| API external-upset tubing couplings | 1.050–4½ in | Special-bevel dimensions, OD, minimum length, bore and calculated mass |
| Standard / special-clearance tubing couplings | 1.050–4½ in | Standard and special-clearance OD, minimum length, bearing-face geometry and calculated mass |
The detailed working tables remain under technical verification. They are not dimensional acceptance tables and do not override the purchase order or governing standard.
CONNECTION FAMILIES
Match thread form, clearance and service requirement.
A coupling is selected with the complete parent-pipe designation. Similar nominal sizes are not automatically interchangeable across mass, grade or connection variants.
Round
Casing couplingAPI short- or long-round thread geometry as specified for the matching casing.
BTC
Buttress casing couplingAPI buttress-profile coupling inspected with the applicable plug gauges and dimensional controls.
EUE / NUE
Tubing couplingExternal-upset or non-upset tubing coupling matched to the specified tubing end finish.
Special clearance
Project selectedReduced-clearance or special geometry requires confirmation of OD, bore, thread and service compatibility.
PUP JOINTS
Specify the short component as completely as the full-length pipe.
Pup-joint numerical ranges have not yet been approved for publication. OAK reviews each enquiry against the matching casing or tubing requirement.
Casing pup joints
Provide casing OD, nominal mass or wall thickness, grade, connection at both ends and required length.
Tubing pup joints
Provide tubing OD, nominal mass, grade, EUE / NUE / integral or special connection and required length.
Special configurations
Mixed connections, non-standard lengths and drawing-based accessories require interface and authorization review.
INSPECTION & TRACEABILITY
Control the component from incoming material to finished connection.
Inspection frequency, methods and acceptance criteria are defined by the governing standard, product specification and agreed inspection plan.
| Control stage | Typical verification | Resulting evidence |
|---|---|---|
| Material receipt | Material identity, heat / lot traceability, chemistry and supplied condition | Material certificate and incoming inspection record |
| Heat treatment | Approved route, batch identity and mechanical-property verification as applicable | Heat-treatment and test records |
| Component geometry | OD, bore / drift, length, wall, straightness and specified coupling features | Dimensional inspection report |
| Finished threads | Profile, taper, lead, height and stand-off using applicable calibrated gauges | Thread and gauge inspection record |
| Surface & marking | Thread finish or treatment, corrosion protection, protectors and traceable marking | Final visual and marking record |
| Release | Quantity, documents, packing and purchase-order compliance | Release note and indexed final dossier |
NDT, hardness, impact, hydrostatic or supplementary testing is included when required by the ordered product, material, service condition or purchaser specification. Final scope is confirmed before manufacturing release.
DOCUMENTS & DELIVERY
Keep every component identifiable through packing and shipment.
The document package and protection method are agreed with the order so that couplings and pup joints arrive ready for controlled storage and installation.
Traceability
Heat or lot identity is connected to material, heat treatment, dimensions, thread inspection and final marking.
Document package
MTC, dimensional and thread records, NDT or pressure-test reports when ordered, packing list and release documents.
Protection & packing
Suitable thread protectors, corrosion prevention, separated packing and visible package identification for the selected transport route.
COMPONENT RFQ CHECKLIST
Send the matching pipe designation.
Component selection is faster and safer when the enquiry identifies the parent casing or tubing and the complete connection requirement.
Request Couplings or Pup Joints- 01Component type, nominal size and quantity
- 02Parent pipe nominal mass / wall thickness and grade
- 03Complete connection and coupling designation
- 04Required pup-joint length and end configuration
- 05Clearance, surface treatment and thread-protector requirements
- 06Inspection, documents, marking, packing and destination
PRODUCT & PROCESS VIEWS
Product views and manufacturing context.
Representative product, production and inventory views support preliminary identification. Final supply details are confirmed against the quotation.
START A CONVERSATION
Have a specification or product list?
Send it to OAK PIPE for technical and commercial review.