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High-density epoxy resin blocking material

A technology of epoxy resin and plugging materials, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of low strength, achieve high strength, increase cross-linking density, and improve wettability

Inactive Publication Date: 2019-08-13
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN108865087A discloses a thermosetting epoxy resin cementing working fluid, the main components of which are 100 parts of water-based epoxy resin, 30 parts of barite, 40 parts of iron ore powder, and 1 to 30 parts of water. Density is 1.30g / cm 3 and 1.45g / cm 3 The working fluid, the compressive strength after curing at 50°C is 22.0MPa and 19.6MPa respectively, the strength is relatively low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 1.2 parts of isopropyl tris(dioctylpyrophosphate acyloxy) titanate coupling agent and 50ml of aqueous ethanol (1:9) into a three-necked flask, and stir rapidly at 3000rpm at 40°C. While stirring, slowly add 10 parts of coupling-treated quartz sand and stir for 30 minutes. After the stirring is completed, wash with distilled water and dry in an oven at 100°C for 3 hours before use.

[0024] At room temperature, 100 parts of epoxy resin YDF-165, 8 parts of tetraglycidyl ether tetraphenylethane, 10 parts of quartz sand after coupling treatment and 25 parts of 1,4-butanediol diglycidyl ether were added to Stir evenly in the mixing tank and let it stand for 5 minutes; add 20 parts of 4,4'-diaminodicyclohexylmethane and 1.0 part of 2,4,6-tris(dimethylaminomethyl)phenol into the mixing tank, stir evenly, Eliminate air bubbles in a vacuum drying oven, and then cast in a mold; solidify the cast material at 80°C for 24 hours.

[0025] Viscosity: The measurement method refe...

Embodiment 2

[0029] The implementation steps are the same as Example 1, except that: the isopropyl tris(dioctyl pyrophosphate acyloxy) titanate coupling agent is changed from 1.2 parts to 1.5 parts, the stirring time is changed from 30 min to 60 min, and the coupling treatment The final quartz sand is changed from 10 parts to 15 parts, tetraglycidyl ether base tetraphenylethane is replaced by triphenyl glycidyl ether base methane, and 2,4,6-tris(dimethylaminomethyl)phenol is changed from 1.0 parts becomes 1.3 parts.

[0030] Performance measurement: the method is the same as in Example 1.

Embodiment 3

[0032] The implementation steps are the same as Example 1, except that the stirring temperature is changed from 30°C to 60°C, the quartz sand after coupling treatment is changed from 10 parts to 20 parts, and 25 parts of 1,4-butanediol diglycidyl ether is replaced 32 parts of butyl glycidyl ether and 20 parts of 4,4'-diaminodicyclohexylmethane are replaced by 25 parts of cardanol-modified phenalkamine.

[0033] Performance measurement: the method is the same as in Example 1.

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Abstract

Disclosed is a high-density epoxy resin blocking material. According to the blocking material, quartz sand is pretreated by a titanate coupling agent and then mixed with bisphenol F-type epoxy resin,polyfunctional epoxy resin and the like, the density is adjusted with the quartz sand, a curing reaction is controlled by the polyfunctional epoxy resin, and curing is carried out at 80 DEG C. The prepared blocking material has the compressive strength of 65-92 MPa and the density of 1.21-1.43 g / cm<3>, and can effectively block oil and gas wells. The curing substance does not contain harmful volatiles and is environmentally friendly.

Description

technical field [0001] The invention relates to a plugging material for oil and gas wells, more specifically, a high-density epoxy resin plugging material. Background technique [0002] In the process of oil and gas well cementing operations, the cement sheath plays a role in sealing the underground fracture layer and preventing interlayer channeling. However, incomplete plugging will affect the long-term stability of the cement sheath and reduce its mechanical properties. Therefore, it is necessary to plug the fracture layer. Epoxy resin is a new type of plugging material after cementing. CN107216609A relates to a fast plugging epoxy resin grouting material, the main components are 40 parts of epoxy resin E-51 and 60 parts of epoxy resin E-44, 10-20 parts of benzyl glycidyl ether, and 30-40 parts of curing agent , the density of the grouting material after mixing is 1.11g / cm 3 , the compressive strength is 83.5-87.5MPa, and can be cured at room temperature. [0003] Oil ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/44
CPCC09K8/44
Inventor 郭宏飞柳鹏程庆彦张福强
Owner HEBEI UNIV OF TECH
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