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Premium API 5CT Oil Casing Pipes for Oil & Gas Drilling Applications

API 5CT oil casing pipe manufacturer in China
N80 oilfield casing pipe wholesale supplier
OEM customized oil casing pipe manufacturer
API certified seamless steel oil casing
API 5CT oil casing pipe manufacturer in China
N80 oilfield casing pipe wholesale supplier
OEM customized oil casing pipe manufacturer
API certified seamless steel oil casing

Oil Casing (Oil Special Pipes)

Product Overview

Oil well casing is a core cementing string used in oil drilling and completion processes. It primarily supports the wellbore, isolates the formation, and ensures smooth drilling operations. The product is made of high-quality carbon steel using a seamless rolling process, manufactured strictly according to API SPEC 5CT standards. It is graded in multiple levels, from J55, K55, N80, L80 to P110, to meet the engineering needs of different well depths, pressures, and corrosive environments .

Product Details

Product Advantages

Implementing the API 5CT standard: American Petroleum Institute standard, widely accepted by global oil and gas developers, meeting the basic entry threshold of the international market ;

The steel grades are diverse, covering different working conditions from shallow wells (J55/K55) to deep wells with high pressure (P110/Q125). The anti-corrosion steel grades can also meet the special needs of acidic environments containing H₂S .

Complete supporting oil and gas pipeline materials: API 5CT matching pipe fittings such as couplings and reducing joints can be supplied simultaneously to ensure consistent thread sealing and connection ;

High compatibility: The thread type is well compatible with wellhead equipment and subsequent oil production tools ;

Quality traceability: Each pipe is printed with steel grade, furnace number, etc., and comes with an API-certified third-party inspection report .

Application Areas

Oil and gas drilling and cementing (surface/technical/reservoir casing)

Geothermal well casing, coalbed methane wellbore support pipe

Gas storage injection and production well completion string

CO₂-enhanced oil well tubing or acidic gas field wells (preferably using corrosion-resistant steel grades such as L80-1/C95).

Deep-sea/ultra-deepwater drilling riser base pipe (medium-thick wall seamless pipe involves higher standards)

Product parameters

Parameters

Parameters/Standards

Nominal diameter range (DN/mm)

4½" ~ 20" (114.3mm ~ 508mm)

Base pipe material

API 5CT steel grades: J55, K55, N80, L80, P110,
Q125

Inner coating/lining material

Uncoated (bare tube, inner coating available upon request)

Outer coating material

Uncoated (bare pipe, external corrosion protection can be customized)

Operating temperature range

Depending on the steel grade, the operating temperature is typically -20℃ to +200℃ (downhole conditions).

Maximum working pressure

Depending on the steel grade and wall thickness, it can reach tens of MPa.

Main implementation standards

API SPEC 5CT (Most Advanced Version)

Connection method

Threaded connections (BTC/LTC/STC) and special threads

Key safety/performance indicators

Internal pressure resistance/external extrusion resistance; thread seal performance; full-size test

Typical application areas

Oil and gas drilling and cementing (surface/technical oil layer plugging)

Inquiry Now

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Oil Casing (Oil Special Pipes)

Oil well casing is a core cementing string used in oil drilling and completion processes. It primarily supports the wellbore, isolates the formation, and ensures smooth drilling operations. The product is made of high-quality carbon steel using a seamless rolling process, manufactured strictly according to API SPEC 5CT standards. It is graded in multiple levels, from J55, K55, N80, L80 to P110, to meet the engineering needs of different well depths, pressures, and corrosive environments .

+86 17866711059

+86 17866711059

zhanlong.wang@haodeboer.com

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