HDPE Liner Tubing

In 2003, Shengji became the first Chinese company who introduce HDPE liner
tubing production line. Up to now, SJ has provided 15 million meters HDPE liner
tubing for more than 10,000 wells home and abroad. The repair free time has been
extended by 4 to 7 times, and the operation cost has been greatly reduced.
Products are exported to Oman, Bahrain, Ecuador, Algeria, Kazakhstan,
Turkmenistan, Sudan,etc.

Product Features

1.Advanced: It is the most effective anti-wear technology in the world;

2.Wear resistance: low friction coefficient, wearresistance is more than five
times that of steel;

3.Anti-corrosion: resistant to all kinds of acid, alkali, salt;

4.Anti-scaling: the inner wall is smooth and the polarity is strong;

5.Adaptability: Oil and water wells are easy to operate and adapt to changes
in temperature and load;

Technical Parameter

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		Sliding Wear，mm²/m	89	≤0.0035	Q/SH 1020 1889
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

Parameter Changes compared with normal tubing

1.Change in weight

After lined, the weight increase by 7%～8%;The density of liner is 0.94g/cm3,
close to oil liquid.

2.Change in ID

The inner diameter of HDPE liner tubing changes compared with normal tubing,
and the specific size is as follows

Size	Unlined ID	Go Gauge	Lined ID	Go Gauge
2 7/8	62	59.62	54	51
3 1/2	76	72.82	67	64
4 1/2	100.54	97.36	89	86

3. Change in Coupling length

The purpose of using the extra long coupling is to eliminate the risk of pin
ends contact and ensure that J-area gap is maintained according to API 5CT.

4. Change in working temperature

Working temperature is 100 °C, which is much lower than that of the normal
tubing.

Product Application

Oil and water wells with well depth not exceeding 1800 m and temperaturenot
exceeding 100 ℃.

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