Inquiry coated tubing 3-1/2″ L80 type 13Cr, tubing with internal protective coating

Seq.  

No.

Name 

Unit of meas. 

Value

1 

Occurrence depth 

m 

3000-4000

2 

Formation pressure 

kg/cm2 

Up to 320

3 

Formation temperature 

°С 

113

4 

Н2S content in formation gas 

Molar concentration, 5 

< 0.64

5 

СО2 content in formation gas 

Molar concentration, 5 

< 2.74

6 

Paraffin content in formation fluids 

Weight content, % 

< 3%

No. 

Requirements /parameters

TUBING

1 

General requirements

1. The seamless tubing and couplings with the DN 3-1/2” OD, weight per unit  length 9,2 lb/ft and with the wall thickness of 6.45mm must meet the requirements of API  5CT. 

2. The seamless tubing and couplings with the DN 4-1/2” OD, weight per unit  length 12,75 lb/ft and with the wall thickness of 6.88 mm must meet the requirements of  API 5CT.

2

Characteristics of the oilfield  environment and operating  

conditions

Pumped medium – multiphase medium, consisting of oil, gas (free and solved in the liquid  medium), water and contamination, with the following properties: Average temperature  under formation conditions – 40-150 °С; oil density – 750-1000 kg/m3; water density – 1000-1200 kg/m3; Н2О weight content up to 50%; Н2S content – up to 1.0% molar and  CO2 content – up to 2.5% molar, impurities from 100 to 1000 mg/l, Paraffin content – up  to 36% of mass. 

Ambient temperature from 0 to +60 ° С

3 

Tubing production method 

Seamless

4 

Manufacturers’ warranty

Tubing manufacturers’ warranty: Number of RIH/POOH operations with a phosphated  coupling – 6 RIH/POOH, with galvanized coupling – 10 RIH/POOH operations;  working service — 18 months TSN or 24 months from the delivery time  whichever falls first.

5

The service life shall be calculated  as follows: 

60 months

6

Level of requirements to the  product

According to Table H.1 API 5CT for tubing L80 Type 13Cr, with the mandatory SSC test,  in accordance with API 5CT.

7

Requirements to the length of  tubing 

Interval 2 (28-32 feet), permissible length deviation, max. 2.0.

8 

Requirement to the wall thickness

The wall thickness shall be measured and registered along the entire length to provide  evidence of compliance of the wall thickness with the requirements of API 5CT standard.  For the surface, covered by automated control system, the minimum coverage shall be  25%.

9

Chemical make-up of tubing and  coupling steel

The chemical properties shall be adopted in accordance with the requirements of Table C.4  API 5CT for steel of the strength group L80 Type 13Cr;

10 

Mechanical properties 

The mechanical properties shall be adopted in accordance with the requirements of Table  C.5 API 5CT for steel of the strength group L80 Type 13Cr;

11 

Heat Treatment 

According to API 5CT, production process is -S. C- heat treatment along the entire length  is mandatory. Normalized or normalized and annealed, at manufacturer’s option.

12 

Impact-Bending Test

Charpy V-notched Impact Test. The impact test shall be in accordance with Appendix  А.10 SR16. The test temperature shall be 21°C (70°F) for the grade J55 and К55 and 0°C  (32°F) for rest of the groups; upon Agreement between the Buyer and the Manufacturer lower temperature is also possible.

13 

NDT

All the tubes shall undergo tests for detection of the transverse and longitudinal defects on  the outer and inner surfaces with the Ultrasonic Level 3 or EMI in accordance with the  requirements of А.2 SR1.

14 

Nipple and coupling threads

Type of threaded connection – Coupling, (NU), Buttress (according to API Spec 5B) 

The external thread of the product shall undergo abrasive flow machining by any relevant  method, including the thread machining process agreed between the Buyer and the  Manufacturer as appropriate to exclude the material with scoring and flaking susceptibility  during cross-threading. 

15 

Requirement to the production of  couplings

The couplings shall be seamless, of the same grade and type as the tubes, shall meet the  same PSL level of requirements or higher and shall undergo the same thermal treatment as  the tubes.

16 

Requirements to the surface of  tubes and couplings 

The couplings shall be free of deficiencies leading to the thread discontinuity

17 

Hydrostatic test 

Time for holding the tubing under the internal test pressure shall not exceed of 10 seconds,  pressure drops are not allowed.

18 

Coating 

The tubing shall have any type of outer coating preventing them from corrosion during  their transport and storage within 6 months. 

19 

Greasing of nipple and coupling  threads

According to the Agreement between the Manufacturer and the Buyer the grease can be  applied both the to the tubing and coupling. 

Unless otherwise stated in the Agreement, the grease shall meet the requirements of ISO  13678 or API RP 5A3. Tubing with threads and couplings shall have thread protectors on  their free ends and couplings. Tubing with threaded ends but without couplings shall have  thread protectors on both ends.

20 

Tubing marking

Each tube shall have clear punch or milling marking applied at a distance of 0.9mm from  free coupling faces with the hight of characters 5-8mm, depth 0.25-0.4mm (ensured by the  procedure, not controlled) indicating the following information: – DN*wall thickness, mm  – grade – owner identifying name (ZN Vostok LLC) – manufacturer’s identifying name or  trademark- tube number- tube length, cm- manufacture date (month, year). 

Each tube shall have clear marking applied longitudinally with a light paint, with the hight  of the characters 20-50mm, indicating the following information: – tube bank number- tube  number- DN, mm- wall thickness, mm;  

The numbers of banks and tubes shall not repeat within a calendar year.

21 

Coupling marking

The coupling shall have punch or milling marking (Appendix 1) indicating the following  information: – grade – manufacturer’s identifying name or trademark 

– manufacture date (month, year), hight of characters 5-8 mm, depth of characters 0.25- 0.4mm 

22

Packaging, transport and storage

It is necessary to ensure packing of tubes in hexagonal packages, delivery of new tubes  with transport straps or textile slings on the nipple or coupling face of the tube bank  designed for lifting the rube banks and approaching steel slings, the length of the transport  straps shall prevent simultaneous hooking. The couplings of the tubes in the bank shall be  located on the same side. There shall be a information tag securely fastened on both sides  of tube banks to protect its loss during transportation. The field ends shall be covered with  shipping bonnet to protect them from mechanical damages. The packaging shall be  nonreturnable.

23 

Information tag

Shall contain the following information:  

– order number 

– manufacturer’s identifying name or trademark 

– diameter and wall thickness, mm 

– grade 

– joint design 

– batch number 

– number of the tube bank (individual for each bank)  

– the range of the tube numbers in the bank as per quality certificate 

– number of tubes in the bank 

– total length in meters of tubing in the bank, m 

– net weight, gross weight, kg 

– manufacture date (month, year). 

The information shall be clear and easy to read.

24 

Incoming Inspection 

The Customer is entitled to require tubing manufacturing inspection and incoming  inspection by an independent inspection company.

25 

Quality Certificate

Shall contain the following information:  

– order number 

– information on exporter and receiver 

– manufacturer’s identifying name or trademark 

– diameter and wall thickness, mm 

– grade 

– type of threaded connection 

– heat numbers, batch numbers 

– type of coating (internal, outer), if any 

– – number of the tube bank (individual for each bank) and the range of the tube numbers in  the bank as per quality certificate 

– mechanical properties and type of thermal treatment 

– steel grade and chemical make-up of the steel 

– thread-sealing grease grade 

– total number of tubes and information on tube number in each bank 

– total length in meters of tubing and information on total length in meters in each bank, m – total weight and weight of each bank, kg 

– manufacture date, quality control results. 

The Quality Certificate shall be submitted to the Customer in paper form, electronic copy  shall be submitted upon request as well. Upon request a Register of tube numbers  indicating the length of tubes shall be additionally attached to the Quality Certificate. The  Register of tube numbers shall be submitted in the electronic form only. The e-mail shall  be indicated in the Tubing Order Form.

26 

Other requirements 

Shall correspond to API 5CT

Requirements to the internal coating

1 

Designation 

Protection of the tubing from corrosion attack, contamination, prevention from deposits of  asphalts on the tubing inner surface.

2 

Type of coating

Advanced polymeric coatings, the tube couplings have thermo-diffusion zinc coating.

3 

Streamers

Complete with streamers – corrosion-resistant and thermal-resistant inserts for the  protection of the inner surface of a coupling and tube nipple face, an adjusting wrench  shall also be included.

4

The initial appearance of the  tubing internal coating shall meet  the following requirements:

Solid, uniform, flowed glossy surface (ripple markings are allowed in accordance with the  profile of the tubing internal coating within possible variation per total length); cracks,  pinholes, bubbles and other defects of the surface, uncovering the metal and visible with  the naked eye are not permitted. 

Safe-keeping and integrity of the covering during transportation and storage at  temperatures up to -60°С 

Safe-keeping and integrity of the covering during the tube service within the temperature  range from 0 to + 180 °С

5

The appearance of the tube  

internal coating after heating to  260˚С and cooling to 18-25˚С

Shall meet the following requirements – lack of cracks, visible with the naked eye.

6

Appearance of the internal coating  after the kickback of 4.5J 

Shall meet the following requirements – lack of chips and cracks down to a metal surface

7

Initial dielectric continuity of the  internal coating 

Not less than 2.0 kV/mm

8 

Internal coating of tube ends 

Shall be applied to a steel backplate with a removed layer of a cover metal with depth of  60-80µm at a distance exceeding the length of the tubing thread 2.1-2.3 times.

9 

Thickness 

Not less than 200 µm

10 

Density 

2.3 – 2.6 g/cm³

11 

Make-up torque 

Shall endure without coat damage not less than the calculated makeup torque

12 

Hardness by Mohs scale 

not less than 5

13 

Tensile strength 

not less than 100 MPa

14 

impact toughness 

not less than 2.0 J

15 

Initial adhesion strength against  the tubing steel 

Not less than 10.0 MPa

No. 

Name 

Options

1 

Tubing diameter (outer) 

88.9 mm

2 

Wall thickness 

6.45 mm

3 

Grade 

L80 Type 13Cr

4 

Type of threaded connection 

Coupling,(NU),Buttress (according to API Spec 5B)

No. 

Name 

Options

1 

Tubing diameter (outer) 

114,3 mm

2 

Wall thickness 

6,88 mm

3 

Grade 

L80 Type 13Cr

4 

Type of threaded connection 

Coupling,(NU),Buttress (according to API Spec 5B)

N 

o.

Name 

Type,  

Grade,  

Drawing  

No,  

GOST,  

TS

Brief  

Description  And  

Specificatio ns

Unit  

Of  

Meas 

.

Volume  (Numbe 

r)

Price Per  Tone, net  of VAT,  

USD

Total Price,  net of VAT,  USD

Price Per  Tone, inc.  VAT,  

USD

Total  

Price, inc.  VAT,  

USD

Delivery Time  

(month, year) 

Venue for  

delivery of  

goods,  

provision of  

work and  

services

Country  

Of Origin

1

Tubing string  3-1/2” L80  

Type 13Cr

API Spec  5B

Utilized in oil  field wells for  transportation  of gas and 

liquid  

substances

Tons  

/ m

77,3 

/ 5 670