Applications
- Sour H₂S and CO₂ service
- High-collapse, deep and HPHT wells
- Thermal, low-temperature and corrosion-critical environments
ADVANCED WELL TUBULARS
Special-Service OCTG
OCTG configurations for high collapse, HPHT, sour, corrosive, thermal and other demanding well environments.
StandardAPI 5CT / ISO 11960 · API 5C3 / ISO 10400 design references
Size / supply rangeCasing and tubing combinations reviewed by application · Availability depends on grade, wall, connection and qualification scope
Grades / materialsHigh-collapse carbon and low-alloy grades · Controlled-hardness sour-service grades
Connections / optionsAPI and premium connections selected against service loads · Gas-tight and high-torque options subject to qualification
TECHNICAL PROCUREMENT
Define special-service octg around the operating requirement.
Availability and final supply scope are confirmed after technical review. OAK PIPE coordinates the product configuration, manufacturing route, inspection requirements and delivery package against the enquiry.
Configuration options
- High-collapse and controlled-yield-strength grades
- Sour-service and restricted-hardness material routes
- Corrosion-resistant alloy, enhanced toughness and special connection options
Quality & documentation
- Heat-treatment and mechanical-property verification
- Hardness mapping and SSC, HIC or corrosion testing when specified
- Full material, NDT, dimensional and traceability dossier
PROCUREMENT BASIS
Technical scope at a glance.
This summary supports preliminary comparison. Final dimensions, tolerances, availability and acceptance requirements are confirmed against the enquiry and governing purchase documents.
| Reference basis | API 5CT / ISO 11960, ISO 15156 / NACE MR0175 where applicable, and purchaser-specific requirements |
|---|---|
| Product configuration | High-collapse and controlled-yield-strength grades · Sour-service and restricted-hardness material routes · Corrosion-resistant alloy, enhanced toughness and special connection options |
| Verification basis | Heat-treatment and mechanical-property verification · Hardness mapping and SSC, HIC or corrosion testing when specified · Full material, NDT, dimensional and traceability dossier |
| Commercial confirmation | Size or drawing · Material / grade · Quantity · Service conditions · Inspection scope · Destination and schedule |
The purchase order, approved drawings and agreed specification take precedence over this website summary.
RFQ CHECKLIST
Information to include with your enquiry.
A clear starting specification allows faster technical review and a more accurate commercial response.
Prepare Your RFQ- 01Well environment and fluid composition
- 02Design loads, pressure, temperature and service life
- 03Size, weight, grade, connection and quantity
- 04Required sour-service basis, supplementary tests and acceptance criteria
PRODUCT OVERVIEW
Special-Service OCTG for project-specific requirements.
Special-service OCTG is configured for wells where conventional grade and connection selections may not provide adequate resistance to collapse, pressure, temperature, corrosion or combined loading. The appropriate route depends on the actual well design and cannot be selected from a single marketing grade name.
OAK reviews high-collapse, HPHT, sour-service, corrosion-resistant, thermal-well and low-temperature requirements against the requested dimensions, mechanical properties, environmental severity, connection performance and qualification program. Each order requires a clearly defined technical basis and inspection plan.
TECHNICAL SCOPE
Supply basis at a glance.
Use this overview to prepare an enquiry. The final size, grade, connection and inspection combination is confirmed against the governing specification.
| Technical field | Available or review basis |
|---|---|
| Standards | API 5CT / ISO 11960 · API 5C3 / ISO 10400 design references · NACE MR0175 / ISO 15156 where applicable · Project-specific qualification requirements |
| Size & supply range | Casing and tubing combinations reviewed by application · Availability depends on grade, wall, connection and qualification scope |
| Grades & materials | High-collapse carbon and low-alloy grades · Controlled-hardness sour-service grades · CRA and corrosion-resistant routes · Thermal-well and low-temperature options |
| Connections & options | API and premium connections selected against service loads · Gas-tight and high-torque options subject to qualification |
PRODUCT PARAMETERS
Recorded product specifications.
The values below come from the maintained OAK product record. Contract dimensions, tolerances and acceptance criteria remain subject to final order review.
| Parameter | Specification / value |
|---|---|
| Product families | High collapse, HPHT, sour service, CRA, thermal and low-temperature OCTG |
| Qualification basis | API / ISO requirements plus agreed project-specific criteria |
APPLICATIONS
Where this product is used.
- Deep and ultra-deep wells
- HPHT wells
- H2S / CO2 environments
- Steam-injection and thermal recovery wells
- Arctic, subsea and low-temperature service
SERVICE & SELECTION
Conditions considered during selection.
- Enhanced collapse demand
- Combined burst, tension and compression
- Sulfide stress cracking risk
- General and localized corrosion
- Thermal cycling
MANUFACTURING
Controlled production route.
Key operations are coordinated against the product specification and order requirements.
01Application-specific material and process plan
02Controlled heat treatment
03Enhanced dimensional and property control
04Connection machining through qualified route
05Order-specific testing and release
INSPECTION & TESTING
Verification before release.
- Expanded mechanical and hardness testing
- NDT and hydrostatic testing
- Collapse or qualification tests when ordered
- SSC / HIC or corrosion testing where specified
- Connection inspection
QUALITY DOCUMENTS
Evidence supplied with the order.
- Project-specific MTC
- Qualification and laboratory reports
- Heat-treatment and NDT records
- Connection and dimensional reports
- Final manufacturing record book
PACKING & DELIVERY
Prepared for the destination and handling plan.
Marking, protection and shipment details are confirmed during order review.
Enhanced connection and surface protection
Segregated identification by service class
Export and long-term storage protection when required
RFQ CHECKLIST
Information needed for a practical quotation.
Share the available technical and commercial requirements. Missing details can be reviewed with our team.
Request a Quote- 01Well depth, pressure, temperature and load envelope
- 02H2S, CO2, chlorides and fluid chemistry
- 03Size, grade, wall and connection
- 04Required design margins and qualification tests
- 05Inspection, documentation and delivery program
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.