Thermosetting epoxy resin well cementation working solution
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A water-based epoxy resin and epoxy resin technology, which is applied in drilling compositions, chemical instruments and methods, etc., can solve the problems such as the inability to fully exert the advantages of resin material toughness and environmental pollution, and achieve good construction performance and reliable technology. Effect
Inactive Publication Date: 2018-11-23
BC P INC CHINA NAT PETROLEUM CORP +2
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However, the above-mentioned technologies either use resin materials and oil well cement in combination, and cannot fully utilize the toughness advantages of resin materials; or use non-water-soluble epoxy resin systems, and the pipelines need to be cleaned with organic solvents after construction, which is easy to cause environmental pollution. Pollution
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Embodiment 1
[0033] Formula: 100 parts of bisphenol A water-based epoxy resin, 1 part of aliphatic amine curing agent, 0.5 part of toughening agent, 1.0 part of ethyl acetate, 30 parts of barite, and 10 parts of water.
Embodiment 2
[0035] Formula: 100 parts of bisphenol A water-based epoxy resin, 3 parts of aliphatic amine curing agent, 1.5 parts of toughening agent, 2.5 parts of butyl acetate, 40 parts of iron ore powder, and 30 parts of water.
[0036] The composition and preparation of the toughening agent are the same as in Example 1.
Embodiment 3
[0038] Formula: 100 parts of bisphenol A water-based epoxy resin, 5 parts of aliphatic amine curing agent, 2.5 parts of toughening agent, 2.5 parts of ethyl acetate, 20 parts of hollow glass microspheres, and 20 parts of water.
[0039] 2. Performance test of thermosetting epoxy resin cementing working fluid
[0040] Example 1, Example 2, and Example 3 were prepared according to the national standard GB / T 19139-2012 for cementing working fluid, and the density, fluidity, free liquid, thickening time, and compressive strength of the cementing working fluid were measured. , the experimental results are shown in Table 1.
[0043] Note: Test conditions for thickening time: 50℃×25MPa (heating time 30min)
[0044] The experimental results in Table 1 show that the application performance of the thermosetting epoxy resin cementing working fluid of the present invention is good, an...
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Abstract
The invention discloses a thermosetting epoxy resin well cementation working solution which is prepared from the following ingredients in parts by weight: 100 parts of bisphenol A type waterborne epoxy resin, 0.3 to 4.0 parts of an aliphatic amine curing agent, 0.2 to 4.0 parts of a flexibilizer, 0.1 to 3.0 parts of an ester diluent, 5.0 to 60 parts of a density modifier and 1 to 30 parts of water, wherein the flexibilizer is a mixture of modified carbon nanotube and modified magnesium borate crystal whisker according to a part-by-weight proportion of 0.2 to 3.0; the modified nanotube is prepared by a carbon nanotube surface modifying method, the carbon nano tube is oxidized at first, and the carbon nano tube is treated by sodium hypochlorite; the modified magnesium borate crystal whiskeris prepared by a magnesium borate crystal whisker coupling treatment method. The thermosetting epoxy resin well cementation working solution disclosed by the invention has the characteristics of hightensile strength, high rupture strength and good toughness, can be directly applied to oil gas well cementation, also can be applied to repairing of damaged cement sheaths on which micro cracks arre generated and has a wide market application prospect.
Description
technical field [0001] The invention relates to a thermosetting epoxy resin well cementing working fluid, which belongs to the field of oil and gas exploration and development and is suitable for oil and gas well cementing operations. Background technique [0002] In oil and gas well engineering, cement sheath is of great significance for oil and gas production. In oil and gas wells, the cement sheath mainly plays the role of isolating various fluids in the formation, protecting and supporting the casing, etc. The cement sheath is a cement-based material with strong brittleness. It is easy to crack during the perforation, acidification, fracturing and other processes of oil and gas wells, resulting in the failure of the sealing integrity of the cement sheath. Therefore, it is of great significance to use new cementitious materials with high toughness instead of oil well cement for well cementing. In recent years, companies both at home and abroad have carried out resin mat...
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