Well structure / casing and tubing
Specify OCTG around the well—not a catalogue label
CNPS supplies casing, tubing and related components for well construction and production service. Grade, dimensions, connection, loads, environment and documentation define the correct route.
Selection structure
Define each string as a system
Keep casing, tubing, connections and accessory interfaces within one controlled equipment list.
Wellbore support and isolation
State outside diameter, wall, grade, connection, length range, setting depth and design loads.
Production or injection conduit
State size, grade, connection, pressure, temperature, produced or injected medium and intervention needs.
Thread and accessory interfaces
Identify required connection family, coupling, pup joints, crossovers and interface ownership.
Confirm evidence with the offer
List the applicable standard, inspection level, material records, marking and third-party requirements.
OCTG enquiry brief
Send the string design and commercial scope together
This reduces assumptions about grade, connection, quantities and inspection.
- GeometryOD, wall, length range, drift, end finish and quantity by line item.
- MaterialGrade, heat treatment, chemistry or sour-service requirement.
- ConnectionThread, coupling, make-up or interchangeability requirement.
- ControlsStandard, inspection, marking, documents, destination and schedule.
Direct answers
OCTG procurement boundaries
Final engineering approval remains with the responsible well-design authority.
Can CNPS quote from an existing tally or bill of materials?
Yes. Include the revision, quantities, standards, connection details, inspection requirements, destination and required date. CNPS can identify missing commercial or technical fields during review.
Does “API” alone define the required OCTG?
No. The applicable specification, grade, dimensions, product level, connection, service conditions and record requirements must still be stated and confirmed.
Connected well paths
Keep adjacent interfaces visible
Casing and tubing requirements often affect cementing, completion and production equipment.
Ready to define an OCTG line item?
Send grade, dimensions, connection, quantity, standard, inspection, destination and delivery requirement.