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Chemical composite resin mounting agent for oil-water well casing restoration

A composite resin, oil well casing technology, applied in drilling compositions, chemical instruments and methods, wellbore/well components, etc., can solve difficult to meet production needs, low tensile and shear strength, adaptability problems such as poor performance, to achieve the effect of restoring production capacity, good pumpability, and good penetration ability

Active Publication Date: 2013-07-31
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Limited by the performance of cement materials, its tensile and shear strength are low, and the controllable time of reaction is limited. The prepared cement slurry is easy to be washed out by water, and the adaptability to various seepage channels is poor, and the operation success rate is extremely high. Low, the actual use effect is difficult to meet the needs of production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1: A kind of chemical composite resin sealant used for oil-water well leakage control, the weight percentage of each component is:

[0033] Main agent: phenol, formaldehyde prepolymerized condensate, dosage 74.9%;

[0034] Auxiliary 1: F-46 epoxy phenolic resin, the dosage is 10%; the product of Shanghai Resin Factory Co., Ltd. is used.

[0035] Auxiliary 2: Epoxy resin 6101, the product of Langfang Zhuerxin Chemical Co., Ltd., the dosage is 5%;

[0036] Curing agent 1: ethylenediamine, dosage 1%;

[0037] Curing agent 2: triethanolamine, dosage 1%;

[0038] Accelerator: acetic anhydride, dosage 1%;

[0039] Plasticizer: dibutyl phthalate, dosage 3%;

[0040] Improver: ethylene glycol, dosage 2%;

[0041] Enhancer 1: polyvinyl alcohol, consumption 2%;

[0042] Reinforcing agent 2: superfine acrylic short yarn, dosage 0.1%.

[0043] The preparation method of the prepolymerized condensate of phenol and formaldehyde: 2.5 parts by weight of phenol, 1.2 par...

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Abstract

The invention relates to a chemical composite resin mounting agent for the oil-water well casing restoration, which can be applied to reinforcing work for the oil-water casing damage restoration when the stratum temperature is 40-110DEG C. The agent is characterized in that the agent comprises, by weight, 60-75% of a phenol and formaldehyde prepolymer, 10-20% of an epoxy phenolic resin F-46, 5-30% of an epoxy resin 6101, 1-5% of ethylenediamine, 1-5% of triethanolamine, 0.5-2% of acetic anhydride, 1-3% of dibutyl phthalate, 2-5% of glycol, 2-5% of polyvinyl alcohol and 0.1-0.2% of an ultrafine acrylic staple fiber. The agent has the following effect: the production capacity of the oil-water well is restored by rebuilding a composite artificial casing on the damaged and deformed casing well segment through combining the restoration reinforcing work for the damaged and deformed casing in the oilfield exploitation with a drilling and milling technology. According to the mounted casing, the tensile strength is 10.8-13.1MPa, the compressive strength is 13-87MPa, and the shearing strength is 9.2-28.9MPa.

Description

Technical field: [0001] The invention relates to the technical field of oil recovery in oil fields, and is particularly suitable for casing repair and reinforcement operations caused by damage and deformation of casing casings in oil and water wells during oil field development. Background technique: [0002] In the process of oil exploitation, oil and water well casing damage and casing deformation caused by various reasons have always plagued oil field production. Severe casing damage often causes oil and water wells to be shut down and scrapped. On the one hand, it directly loses equipment assets and affects production; on the other hand, it damages the completion of the development well pattern for reservoir reserve control and affects the overall development effect of the reservoir. [0003] For oil and water well casing damage and deformation, the solutions adopted at home and abroad are all overhaul technologies by means of simple mechanical shaping and sealing. incl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/44C08L61/10C08L61/06C08L63/00C08L33/20C08L29/04C08G8/10C08K5/17C08K5/12E21B29/10
Inventor 谢刚余吉良吴刚林莎尤冬青孙玉民谢娟李翠琴巨登峰曹瑞民
Owner PETROCHINA CO LTD
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