Internal diameter, pressure loss, production rate, scale, wax and erosion.
OCTG & WELL TUBULARS
Tubing
Production tubing coordinated for well conditions, connection requirements and the agreed inspection scope.
StandardAPI 5CT · ISO 11960
Size / supply rangeTubing outside diameter, weight and wall thickness coordinated to the completion design · R1 / R2 / R3 lengths as applicable
Grades / materialsJ55 / N80 · L80 / C90 / T95
Connections / optionsAPI NUE and EUE · Premium and gas-tight connection pathways
PRODUCTION TUBULARS
The controlled flow path between the reservoir and surface.
Production tubing carries produced or injected fluids inside the casing string and provides a serviceable conduit for completion equipment and well intervention. Its design must account for pressure, temperature, axial loads, corrosion, erosion, connection integrity and planned operating life.
OAK PIPE coordinates tubing, couplings, pup joints, connections, inspection and export delivery around the completion design and operating environment.
Internal/external pressure, tension, compression, temperature and packer effects.
Water cut, CO₂, H₂S, chlorides, stimulation fluids and material compatibility.
SUPPLY OVERVIEW
Typical tubing specifications.
Use this table for initial product screening. The governing standard, requested edition and purchase specification define final dimensions, tolerances and acceptance criteria.
| Primary standard | API Spec 5CT / ISO 11960; API Spec 5B for API threading and gauging |
|---|---|
| Typical outside-diameter range | 1.050 in to 4½ in (26.67–114.30 mm), with availability dependent on size, mass, grade and route |
| Common nominal sizes | 1.900, 2⅜, 2⅞, 3½, 4 and 4½ in; other API-listed sizes reviewed on request |
| Common grades | H40, J55, N80-1, N80-Q, L80-1, C90, T95 and P110; chromium-alloy / special-service grades by review |
| Manufacturing route | Seamless or electric-welded where permitted by the applicable specification and order |
| Length ranges | Range 1: 20–24 ft; Range 2: 28–32 ft; Range 3: 38–42 ft (nominal range references) |
| API connections | NUE (Non-Upset Tubing), EUE (External-Upset Tubing) and selected integral-joint configurations |
| Other connections | Selected premium or special connections subject to authorization, compatibility and technical review |
| End supply | Threaded and coupled, integral joint or plain-end as specified; suitable protectors for shipment |
| Protection & marking | Order-specific preservation, stencil / color marking, heat traceability and bundle identification |
Availability is confirmed by the complete size–mass–grade–connection combination. The purchase specification takes precedence over this overview.
MATERIAL SELECTION
Common API tubing grade families.
The specified minimum yield values provide an initial comparison only. Grade suitability also depends on chemical limits, heat treatment, hardness, toughness and the actual well environment.
| Grade family | Specified minimum yield | Procurement context |
|---|---|---|
| H40 | 40 ksi / 276 MPa | Lower-strength option for selected conventional requirements. |
| J55 | 55 ksi / 379 MPa | Common general-service production tubing grade. |
| N80-1 / N80-Q | 80 ksi / 552 MPa | Higher-strength family with different delivery conditions. |
| L80-1 | 80 ksi / 552 MPa | Controlled-strength and hardness grade used for specified service conditions. |
| L80-9Cr / L80-13Cr | 80 ksi / 552 MPa | Chromium-alloy options requiring detailed corrosion and environment review. |
| C90 | 90 ksi / 621 MPa | Controlled grade for selected demanding well environments. |
| T95 | 95 ksi / 655 MPa | Higher-strength controlled grade for specified production conditions. |
| P110 | 110 ksi / 758 MPa | High-strength tubing option subject to the complete well and connection design. |
TUBING CONNECTIONS
Select for pressure integrity, clearance and running performance.
Tubing connections are reviewed against the gas/liquid seal requirement, axial and torque loads, tubing movement, workover plans and available completion clearance.
NUE
Non-Upset TubingAPI round-thread tubing with pipe ends that retain the nominal outside diameter.
EUE
External-Upset TubingUpset-end API tubing offering a larger connection section for applicable sizes and loads.
IJ
Integral JointConnection machined directly on the pipe ends for selected clearance-sensitive applications.
Premium
Special ConnectionMetal-to-metal sealing, gas-tight, flush or high-torque needs are evaluated by project.
OPERATING MODES
Tubing selected around the production system.
The operating fluid, completion equipment and intervention strategy influence size, metallurgy, connection and inspection.
Oil Production
Tubing strings for conventional, artificial-lift and flowing oil wells.
Gas Production
Pressure-containing strings where sealing performance and gas tightness may govern.
Water Injection
Injection service assessed for pressure, oxygen, chlorides, scale and corrosion control.
Gas Injection / Gas Lift
Tubing configured around cyclic pressure, connection integrity and completion equipment.
ESP Completions
Production tubing coordinated with pump, cable, packer, landing and workover requirements.
Workover & Intervention
Tubing and matching components considered for handling, retrieval and future well access.
SERVICE-SPECIFIC DESIGN
Production chemistry changes the material decision.
Standard API grade selection alone does not establish suitability for a corrosive well. Partial pressure, water chemistry, temperature, flow regime, inhibition strategy and expected life should be reviewed together.
H₂S / sour-service controlsCO₂ corrosion assessment9Cr / 13Cr alloy optionsHigh-pressure gas serviceInjection-well compatibilityThermal and low-temperature service
QUALITY CONTROL
Traceability from pipe body to finished connection.
Inspection and documentation are aligned with the specified product, grade, connection and purchaser requirements.
01Specification and completion review
02Material, heat treatment and mechanical tests
03Dimensions, mass, drift and straightness
04Pipe-body NDT and hydrostatic test
05Thread, coupling, gauging and surface inspection
06Marking, MTC, packing and final release
Typical available documents
Mill Test Certificate · Chemical and mechanical test results · Dimensional / drift report · NDT records · Hydrostatic-test record · Thread and coupling inspection · Certificate of conformity · Packing list · Third-party inspection records when ordered
TUBING RFQ CHECKLIST
Define the completion and the operating environment.
Supply review is faster when the tubing requirement includes the service conditions and connection—not only size and grade.
Request a Tubing Quote- 01Outside diameter, nominal mass / wall thickness and quantity
- 02Grade, standard edition and manufacturing requirement
- 03NUE, EUE, integral-joint or specified premium connection
- 04Length range, pup joints, couplings and accessories
- 05Pressure, temperature, produced fluids, H₂S / CO₂ and water chemistry
- 06Inspection, documentation, marking, packing and delivery 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.