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High Collapse Casing & Tube-API 5CT 80HC,90HC,110HC,125HC,140HC

  • High Collapse Casing & Tube-API 5CT 80HC,90HC,110HC,125HC,140HC
  • High Collapse Casing & Tube-API 5CT 80HC,90HC,110HC,125HC,140HC
  • High Collapse Casing & Tube-API 5CT 80HC,90HC,110HC,125HC,140HC
  • High Collapse Casing & Tube-API 5CT 80HC,90HC,110HC,125HC,140HC
  • High Collapse Casing & Tube-API 5CT 80HC,90HC,110HC,125HC,140HC
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Product Description

Our High Collapse (HC) grades exhibit higher collapse pressure than what is determined by API 5CT/ISO 11960 products.

proprietary Grade fit for high-pressure service

We provides the High Collapse Series of proprietary steel grades for oil and gas wells where high external pressures are anticipated and collapse resistances higher than API are needed.

In addition to uniform external pressures, the reservoir can exert high pressures due to ground movements or saline strata, subjecting pipes to extreme localized external pressure.

Our HC Series is available in minimum yield strengths ranging from 80Ksi to 140Ksi. These products have higher guaranteed collapse pressure than that determined by API 5CT/ISO 11960 products.

Mechanical Properties

Grade

Minimum Yield Strength (kSI)

Maximum Yield Strength (ksi)

Minimum Tensile strength (ksi)

80HC

80

110

100

95HC

95

125

110

110HC

110

140

125

125HC

125

150

135

140HC

140

170

150

Parameters for excellent collapse performance

The collapse of a pipe is related to the stiffness or rigidity of its cross section area along the pipe length. Dimensional and mechanical properties determine a true high collapse proprietary product. We pay strict attention to these variables when producing our HC Series.

Dimensional properties

The dimensional properties of a high collapse pipe depend on three factors: external diameter to wall thickness ratio, ovality and eccentricity. Low ovality, low eccentricity and the maximum wall thickness for the maximum allowed pipe weight will give the best dimensional conditions for collapse resistance.

Mechanical properties

The mechanical properties that determine high collapse are yield strength and residual stresses. Strict control of the heat treatment process to ensure optimum yield strength distribution and minimal compressive residual stresses will lead to the maximum collapse properties of the pipe.

Our HC Series consistently outperforms former API TR 5C3 & ISO/TR 10400 collapse resistance for API steel grades.

Mechanical Properties

Grade

Minimum Yield Strength (kSI)

Maximum Yield StrengtH (ksi)

Minimum Tensile strength (ksi)

80HC

80

110

100

95HC

95

125

110

110HC

110

140

125

125HC

125

150

135

140HC

140

170

150

The design of our High Collapse and Sour Service grades is based on the development of carbon low alloy steels. The manufacturing process is strictly controlled from steelmaking through rolling and heat treatment.

grades to withstand high pressures in corrosive environments

We also supply the High Collapse and Sour Service steel grades to meet the needs of oil and gas operations in environments characterized by a combination of high external pressure and the probability of corrosion cracking due to the presence of H2S.

We offer our High Collapse and Sour Service grades in a range of yield strengths from 80Ksi to 110Ksi.

Mechanical Properties

Grade

Minimum Yield Strength (KSI)

Minimum Tensile Strength (KSI)

Maximum Hardness (HRC)

NACE Method A Threshold % SMYS

80HS

80

95

22

90

95HS

95

105

25

90

100HS

100

105

27

85

110HS

110

125

29

85

Maximum Through-Wall Highness Variation [HRc]

WT < 0.5"

0.5" < WT < 0.75"

0.75" < WT < 1.0"

WT > 1.0"

3

4

5

6

In addition to uniform external pressures, high pressures can be exerted by reservoir, ground movements or saline stratus, subjecting pipes to extreme localized external pressure. Hydrogen sulfide dissolved in water may lead to Sulfide Stress Cracking. The factors that activate the cracking phenomena include: high stress state, high acidity levels, H2S partial pressure and a susceptible microstructure.

The design of the High Collapse and Sour Service grades is based on the development of carbon low alloy steels. The manufacturing process is strictly controlled from steelmaking through rolling and heat treatment.

Our state-of-the-art manufacturing facilities guarantee strict cleanliness, physical and metallurgical control as well as tight dimensional controls to ensure outstanding resistance to hydrogen sulfide cracking under high external pressures.

Standard API 5CT and technical agreement

Grade

80T/80TT, 90T/90TT, 95T/95TT, 110T/110TT, 125T/125TT  HC Series

Thickness

5.21 mm - 15.88 mm

Outer Diameter

4-1/2 inch - 13-3/8 inch

Place of Origin

China

Application

High Collapse Casings

Delivery Condition

Hot Rolled, Q&T

Packing

In bundles as per customer's need

 

·Process control



1) To control strictly the inclusions in steel via the purity steel melting technology.

2) To control strictly the wall thickness and ovality of the tubes during the hot rolling.

3) To guarantee the yield strength and surface quality through the temperature and atmosphere control in the furnace during the heat treatment.

4) Through the second sizing and on line hot straightening after heat treatment, strictly control the residual stress, OD, ovality and staightness.

Specifications︰API 5CT Casing & Tubing

API H40
Minimum Yield Strength: 40,000 psi
Maximum Yield Strength: 80,000 psi
Minimum Tensile Strength: 60,000 psi
Notes: General purpose pipe manufactured to API specification 5CT.
API J55
Minimum Yield Strength: 55,000 psi
Maximum Yield Strength: 80,000 psi
Minimum Tensile Strength: 75,000 psi
Hardness Requirement: None
Notes: General purpose pipe manufactured to API specification 5CT. Similar to K55 except the minimum tensile strength is lower. Usually, this grade is used in tubing applications.
API K55
Minimum Yield Strength: 55,000 psi
Maximum Yield Strength: 80,000 psi
Minimum Tensile Strength: 95,000 psi
Hardness Requirement: None
Notes: General purpose pipe manufactured to API specification 5CT. Usually, this grade is used in casing applications
API L80
Minimum Yield Strength: 80,000 psi
Maximum Yield Strength: 95,000 psi
Minimum Tensile Strength: 95,000 psi
Hardness Requirement: 23 HRC maximum
Notes: Manufactured to API specification 5CT. This is a controlled yield strength material with a hardness testing requirement. L80 is usually used in wells with sour (H2S) environments.
API N80 (or N80 Q&T)
Minimum Yield Strength: 80,000 psi
Maximum Yield Strength: 110,000 psi
Minimum Tensile Strength: 100,000 psi
Hardness Requirement: None
Notes: General purpose pipe manufactured to API specification 5CT.
API Normalized N80
Minimum Yield Strength: 80,000 psi
Maximum Yield Strength: 110,000 psi
Minimum Tensile Strength: 100,000 psi
Hardness Requirement: None
Notes: A lower-cost alternative to standard Quench and Tempered API N80 (walls less than 0.500 inch). Inspection, testing and dimensions are in accordance with API 5CT for grade N80. Charpy v-notch impact test absorbed energy results meet API SR16 and are lower than Quench and Tempered N80.
API C90
Minimum Yield Strength: 90,000 psi
Maximum Yield Strength: 105,000 psi
Minimum Tensile Strength: 100,000 psi
Hardness Requirement: 25.4 HRC maximum
Hardness testing is conducted as required for API T95, with the exception of frequency (Casing and Non-Upset Tubing - First, last and every tenth joint in between; Upset Tubing - First, last and every 25th joint in between). To reduce order lead time, sulphide stress corrosion cracking (SSCC) testing is not required for every order. If required by the customer, SSCC testing can be performed to U. S. Steel Standard Mill Practice P-1004 (NACE Standard TM-0177-Method A) with a guaranteed minimum threshold stress of 85 percent specified minimum yield strength.
API T95
Minimum Yield Strength: 95,000 psi
Maximum Yield Strength: 110,000 psi
Minimum Tensile Strength: 105,000 psi
Hardness Requirement: 25.4 HRC maximum
Notes: API controlled yield strength grade, the same as API C95. Generally for use in sour condensate wells. Extensive hardness testing is required along with SSCC testing per NACE Standard TM-0177-Method A. The minimum threshold stress required is 80 percent of specified minimum yield strength.
API P110
Minimum Yield Strength: 110,000 psi
Maximum Yield Strength: 140,000 psi
Minimum Tensile Strength: 125,000 psi
Hardness Requirement: None
Notes: API grade for general use in deep wells. This grade is not generally considered suitable for sour condensate wells.
API Q125
Minimum Yield Strength: 125,000 psi
Maximum Yield Strength: 150,000 psi
Minimum Tensile Strength: 135,000 psi
Hardness Requirement: No limit specified - Hardness variation requirement
Notes: API grade for deep well service, not generally for use in sour condensate wells. Quadrant hardness testing is required without any specified limits other than the variation between readings. Impact testing is required for each heat and/or lot. NDT inspection is required with two methods of inspection (typically EMI and UT are performed on this product).
V150
Minimum Yield Strength: 150,000 psi
Maximum Yield Strength: 180,000 psi
Minimum Tensile Strength: 160,000 psi
Hardness Requirement: None
Steel grade for use in deep well applications. Dimensions and inspection are in accordance with API 5CT Group 3 requirements.



Standards:
API Specification 5CT latest edition at time of manufacture (PSL-1, PSL-2, PSL, 3)
ISO 11960:2011-06 (E). Petroleum and natural gas industries - Steel pipes for use as casing or tubing for wells.
ISO 13680-2010 Petroleum and natural gas industries-Corrosion-resistant alloy seamless tubes for use as casing,tubing and coupling stock-Technical delivery conditions
ISO/TR 10400:2007 Petroleum and natural gas industries -- Equations and calculations for the properties of casing, tubing, drill pipe and line pipe used as casing or tubing
GOST 632:1980, Casing pipes and couplings.
NORSOK M-703-CR Casing and tubing materials (Rev[1]. 1, Jan. 1996)
DEP 39.01.20.10-Gen L80 13%Cr casing and tubing (amendments/supplements to ISO/DIS 11960.2)
DEP 39.01.20.30-Gen Corrosion-resistant alloy seamless tubes for use as casing, tubing and coupling stock - technical delivery conditions (endorsement of ISO 13680)
DEP 39.01.20.31-Gen Care and use of casing and tubing (endorsement of ISO 10405)
GOST 632-80 Specification of Casing Pipe and Couplings form THEM
PDVSA EM-18-00-05 Requirements for Casing and Tubing
PDVSA EM-18-00-06 Supplementary Requeriments for the supply of seamless casing from special grades collapse

OCTG (Casing & Tubing)
•API 5CT Latest Edition
•OCTG from 1.660" to 30'' + respective couplings, crossovers and pup joints
•API Grades from H40 to Q125 and 13% CR
•ALL API Standard Weights
•API and Premium Joint Connections
•Special SS and HC grades
•CRA Grades
Section: Seamless & Welded

Sizes:
Outside Diameter: 1.660" - 30"

Grades:
H40, J55, K55, N80-1,N80-Q, L80-1, C90-1,C90-2, C95, T95-1,T95-2,T95-3, P110, Q125-1, Q125-2,Q125-3,Q125-4.

13Cr Series:L80-13Cr,C95-SP13Cr1,C95-SP13Cr2,P110-SP13Cr1,P110-SP13Cr2

Connections:
•STC (short round thread casing)
•LTC (long round thread casing)
•BTC (buttress thread casing)
•XL (extreme-line casing)
•NUE (non-upset tubing)
•EUE (external upset tubing)
•IJ (integral joint tubing)
•Premium Connections
And almost any premium & gas tight connection

Length:Range 1, Range 2 & Range 3:
Product Image






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