Why choose HDPE Liner Tubing?

Corrosion and abrasion are serious problems that endanger petroleum and petrochemical industry.

According to the survey, the annual economic loss caused by corrosion and abrasion in the world’s petroleum and petrochemical industry amounts to billions of dollars.

The corrosion and abrasion of pipelines, storage tanks, OCTG tubing & casing and other equipment will become more and more serious with the development life of oil and gas fields and the service life of equipment.

The demand of anti-corrosion and anti- abrasion equipment is more and more urgent.

Corrosion and abrasion of OCTG tubing & casing are very common in oilfields. Corrosive ions such as H, CO-, CL-, K+, Na+, Ca+ and associated substances such as H2S and CO2 in oil Wells are the causes of OCTG tubing & casing corrosion.

The use of a large number of inclined and horizontal wells increases the rate of OCTG tubing & casing abrasion. Many oilfields in the world are in urgent need of a kind of oil tubing pipe which can solve both corrosion and abrasion.

HDPE liner tubing (also known as polycore tubing) is made of special polyethylene, which has the characteristics of anti-corrosion, anti-abrasion, low resistance coefficient and temperature resistance.

It is produced by specific extrusion process and tightly lined into the tubing.

It is suitable for oilfield use.

It can effectively prevent corrosion and abrasion, and improve the service life of tubing and its equipment.

Eccentric abrasion, corrosion and scaling of tubing pipe in oil production wells lead to production stop and production reduction.

In particular, when oil production wells enter the ultra-high water cut stage, the tubing scrapped due to eccentric abrasion accounts for more than 1 / 6 of the total annual tubing consumption, resulting in a huge waste of resources and increased production costs. The use of liner tubing can effectively solve this problem.

1. Reduce the abrasion of sucker rod and inner wall of tubing, improve the anti-abrasion performance of tubing and rod and the corrosion resistance of tubing;

2. Reduce the failure caused by inner wall corrosion of tubing;

3. Effectively prevent corrosion and abrasion, and improve the service life of tubing and equipment

4.Liner Performance

S/N Indicator Type Technical Indicators and Test Conditions Technical Requirement Test Standard
1 Normal Temperature Properties Density, g/cm3 0.94-0.97 GB/T 1033.1
2 Shore Hardness, HD ≥65 GB/T 2411
3 Vicat Softening Temperature(A50),℃ ≥130 GB/T 1633
4 Notched Charpy Impact Strength, KJ/m2 ≥50 GB/T 1043.1
5 Elongation at Break,% ≥400 GB/T 8804.3
6 Tensile Fracture Yield Strength, MPa ≥20 GB/T 8804.3
7 Sliding Wear,mm2/m 73 ≤0.0055 Q/SH 1020 1889
8 89 ≤0.0035
9 Aging Properties Change Rate of Elongation at Break,% Oil bath at 95℃, 6d, room temperature adjustment for 48h ≤15 Q/SH 1020 1889
10 Change Rate of Tensile Fracture Yield Strength,% ≤15 Q/SH 1020 1889
11 Mortar Wear, mm ≤0.05 Q/SH 1020 1889