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An ultra-high molecular weight, polyethylene technology, applied in the field of lining pipes, can solve the problems of loss of anti-eccentric wear, high temperature resistance, and high processing costs, and achieve the effects of improving impact strength, heat distortion temperature, and fluidity.
Inactive Publication Date: 2015-12-30
胜利油田金岛实业有限责任公司
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Problems solved by technology
The former two are inner-coated oil pipes. This type of coated oil pipe is expensive to process, and it is easy to fall off during the downhole process, losing the effect of anti-eccentric wear and anti-corrosion
The HDPE high-density polyethylene lined anti-corrosion and anti-eccentric wear tubing has the biggest problem in use that it is not resistant to high temperature. It can only be used in mines below 80 °C, so for wells with a depth of less than 2500 meters, it will be Unusable due to high temperature
Method used
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Embodiment 1
[0014] Ultra-high molecular weight polyethylene lined pipe, including the following raw materials in mass percentage:
[0015]
[0016] During preparation, the above-mentioned raw materials are prepared according to the formula requirements, and the raw materials are pulverized and stirred by a stirring particle grinder, and then the particle size of the powder material is determined through a vibrating sieve, and the vibrating sieve is 100 mesh; finally, the compounding is passed through a plastic material extruder Raw material with good ratio is extruded into inner liner. Wherein, during the preparation, the thickness of the inner tube wall is determined by adjusting the extrusion speed of the extruder, and the temperatures of the three temperature zones of the extruder are respectively: 200°C, 260°C, and 285°C.
[0017] The above-mentioned fillers are 2% by mass percentage of silicon dioxide, 2% of glass microspheres and 2% of acicular wollastonite.
[0018] Chemical mo...
Embodiment 2
[0026] Ultra-high molecular weight polyethylene lined pipe, including the following raw materials in mass percentage:
[0027]
[0028] Others are basically the same as those in Embodiment 1, and will not be repeated here.
Embodiment 3
[0030] Ultra-high molecular weight polyethylene lined pipe, including the following raw materials in mass percentage:
[0031]
[0032] Others are basically the same as those in Embodiment 1, and will not be repeated here.
[0033] According to the inspection standard: Q / SH10201889-2011, the inner liner is inspected, and the inspection results are as follows:
[0034]
[0035] To sum up, the lining pipe made of these raw materials in the present invention can increase the wear resistance by 39.67%, and the temperature resistance can reach 150 degrees Celsius.
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Abstract
The invention discloses an ultra-high molecular weight polyethylene lining pipe. Raw materials including ultra-high molecular weight polyethylene, polypropylene, dicumyl peroxide, allyl siloxane and fillers are proportioned according to formula requirements, the raw materials are crushed and mixed by a mixing type particle crusher, then the grain size of powder materials is determined through a vibrating screen, and finally the proportioned raw materials are extruded to form the lining pipe through a plastic material extruding machine. By adding the dicumyl peroxide, the polypropylene and the allyl siloxane, the raw materials can be better decomposed under heating during injection molding, the flowability of plastic injection can be improved and the impact strength can be improved; by adding needle-shaped siliceous lime, the thermal deformation temperature can be improved; thereby through the combination of the raw materials, the effects of corrosion resistance, wear resistance and high temperature resistance are realized.
Description
technical field [0001] The invention relates to a lining pipe, in particular to an ultra-high molecular weight polyethylene lining pipe. Background technique [0002] At present, China's petroleum industry attaches great importance to the research and application of enhanced oil recovery technology. As the oilfield enters the late stage of development, the lying wells caused by partial wear, corrosion and scaling of tubing are increasing year by year, so scrapping accounts for 1 / 3 of the total annual consumption of tubing. 6, the input of pipe rods remains high, and the production cost increases year by year. The lined oil pipe has the characteristics of anti-corrosion, anti-wear, small resistance coefficient and temperature resistance, which can effectively prevent wear and corrosion and improve the service life of the oil pipe. The existing technologies include carbon zirconium inner coating anti-corrosion and anti-partial wear oil pipe, rare earth titanium molybdenum ant...
Claims
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