Introduction to Petroleum Casing Products
product overview
Oil
casing is a key pipe material used for drilling and completion of oil
and gas wells. It has the characteristics of high strength, corrosion
resistance, and high pressure resistance, which can protect the
wellbore, isolate formation fluids, and ensure safe oil and gas
extraction. The product complies with the API 5CT standard and covers
multiple steel grades such as J55, K55, N80, P110, etc. It is suitable
for deep wells, ultra deep wells, and complex geological conditions.
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Core advantages
✅ Super strong mechanical properties
-Steel grade coverage J55-P110 (maximum yield strength ≥ 758MPa)
-The anti collapse strength reaches 140MPa (suitable for ultra deep wells)
✅ Adaptability to harsh environments
-H2S tolerance (meets SSC/HIC testing, NACE MR0175 standard)
-High temperature resistance (-50 ℃~+350 ℃)
✅ Precision threaded connection
-API standard buckle type (BTC/LTC/STC)
-Special buckle types (VAM, TMK, etc.) with an airtight sealing performance of up to 10000psi
✅ Full process quality assurance
-100% ultrasonic+eddy current testing
-Third party SGS/BV testing report
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Main steel grades and applications
|Steel grade | Yield strength (MPa) | Typical well depth (m) | Applicable working conditions|
|----------|---------------------|------------------|---------------------------|
|J55 | 379-552 | ≤ 3000 | Shallow low-pressure well|
|N80 | 552-758 | 3000-5000 | Medium deep well, CO ₂ environment|
|P110 | ≥ 758 | 5000-8000 | Deep/ultra deep wells, high stress formations|
|Q125 | ≥ 862 | ≥ 8000 | Shale gas/high temperature and high pressure well|
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Technical Parameter
-Specification range: Φ 114.3mm - Φ 508mm (4 half "-20")
-Wall thickness: 5.21mm-16.13mm (customizable thickened end)
-Execution standards: API 5CT, ISO 11960
-Thread type:
-API standards: Round Thread (BTC), Trapezoidal Thread (LTC)
-Special buckle types: VAM TOP, FOX, etc
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value-added services
⊙ Thread processing: Provide API standard or gas sealed special threading thread
Detection support: full-size inspection+hydrostatic test (including video recording)
Technical consultation: wellbore structure design and casing strength verification
⊙ Logistics support: added protective wire at the pipe end, anti deformation of the sea freight frame box
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