Limestone Quarry Plant

One of the Top 500 enterprises in China foreign trade

QCCO was approved as a member of “China Association for Contracting Projects Abroad “and granted a membership certificate on Sep 28,2005; “Credibility Rating AAA certificate in Foreign Trade” was granted to QCCO by China Shippers’ Association

 
 

Carbon dioxide resistant oil casing

 Anti-CO 2 corrosion oil casing, with good resistance to CO 2 corrosion, suitable for acid medium oil and gas wells containing CO 2 or CO 2 and CL ̄ coexisting, using special gas-tight threaded joints. The pipe body is made of economical low alloy steel containing Cr, Ni, Mo and other alloy elements 3Cr, 5Cr, 9Cr and stainless steel 13Cr, 15Cr. The steel has high thermodynamic stability and directly blocks the anode process (Cr, Ni). , Mo, etc.) alloying elements and elements that promote the cathodic process and surface activity (Cu, Si, Al, etc.), enable the surface of the material to form a surface protective layer corrosion of a highly stable alloy component having one or several atomic layer thicknesses. Structure to improve the CO 2corrosion resistance of the casing The oil casing connection joint adopts the patented air-sealed buckle type developed by Changbao, which is suitable for different complicated and demanding working conditions. At present, anti Changbao CO.'S 2 -corrosion oil casing has special thread through domestic authority detection, and is widely used in the major field, wherein the anti-CO.'S 2 -corrosion CB110S-13Cr steel grade CBS1 cannula has passed "ISO 13679 and Petroleum Natural gas industry. Casing and tubing thread connection test procedures" CAL-II test evaluation for evaluation requirements, CBS3 tubing and casing have passed the "ISO 13679 oil and gas industry. Casing and tubing thread connection test procedures" highest evaluation Required CAL-IV test evaluation.

CB80-3Cr, L80-9Cr, L80-13Cr, CB90-3Cr, CB95-3Cr, CB95-13Cr, CB110-3Cr, CB110-5Cr, CB110-13Cr, CB110S-13Cr Joint performance


     Joint form

Resistance to internal pressure and anti-crushing

Tensile efficiency

Anti-compression efficiency

Applicable well condition

S1

Equivalent tube

100% tube

60% tube

Less harsh well conditions, shallow and middle oil and gas wells, etc.

S2

100% tube

60% tube

Harsh well conditions, medium and deep oil and gas wells, etc.

S3

100% tube

60% tube

The most demanding well conditions, deep wells, ultra-deep wells, horizontal wells, etc.

S3C

100% tube

100% tube

SJ

100% tube

60% tube

Low pressure gas seal wells, ordinary horizontal wells, large displacement wells, etc.

-NUFJ

45% ~ 66% tube

45% ~ 66% tube

Repair wells, tail nozzles, etc.

EU-HT / BC-HT

Equivalent to API EU/BC performance

Ordinary oil well

 

  "S" means "SUPER" super.

Executive Standard (Partial)
  API Spec 5CT Sleeve and Tubing Specification 
  NACE-TM0171 Autoclave Corrosion Testing of Metals in High-Temperature Water 
  API Spec 5B Specification for Processing, Measurement and Inspection of Casing, Tubing and Line Pipe Threads 
  ISO 13679/GB/T 21267 oil and gas industry casing and tubing thread connection test procedures 
  ...

 

Physical and chemical properties

 

Steel grade

name

Yield strength MPa

Tensile strength MPa

Elongation

Impact toughness

Maximum hardness

Scope of application

min

max

min

HRC

80

CB80-3Cr

552

758

689

Calculated according to the API 5CT formula

N80 requirements according to API 5CT

twenty three

Suitable for low corrosion environments containing CO 2

L80-9Cr 、L80-13Cr

552

655

655

L80 requirements according to API 5CT

For corrosive environments containing CO 2

CO P CO 2≥0.02MPa)

90

CB90-3Cr

621

724

689

C90 requirements according to API 5CT

25.4

Suitable for low corrosion environments containing CO 2

95

CB95-3Cr

655

758

724

T95 requirements according to API 5CT

25.4

Suitable for low corrosion environments containing CO 2

CB95-13Cr

For corrosive environments containing CO 2

CO2 P CO2≥0.02MPa)

110

CB110-3Cr

758

965

862

P110 requirements according to API 5CT

32

Suitable for low corrosion environments containing CO 2

CB110-5Cr

Suitable for low corrosion environments containing CO 2

CB110-13Cr

For corrosive environments containing CO 2

CO2 P CO2≥0.02MPa)

CB110S-13Cr

For CO 2 and a small amount of H2S corrosive environment

CO2 P CO2≥0.02MPa)

 


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