Elastic modified resin for oil well cement and preparation method and application thereof

A technology for modifying resin and oil well cement, applied in chemical instruments and methods, drilling composition and other directions, can solve the problems of complex application environment of oil well cement, inability to use resin for cementing, high temperature and high pressure, etc., and achieve thickening time Adjustable, low cost, lowering the effect of elastic modulus
CN110845705AInactive Publication Date: 2020-02-28YANGTZE UNIVERSITY +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
YANGTZE UNIVERSITY
Publication Date
2020-02-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses elastic modified resin for oil well cement. The elastic modified resin comprises the following raw materials in parts by weight: 100 parts of an epoxy resin-based solution and10-25 parts of an epoxy resin curing agent. The invention further discloses well cementation cement paste. The ell cementation cement paste comprises the following raw material s in parts by weight: 100 parts of cement, 36-44 parts of fresh water, 3-6 parts of a fluid loss agent, 0.1-0.6 part of a dispersing agent, 1-4 parts of an early strength agent, 2-5 parts of a reinforcing agent, 0.2-0.6 part of a retarder, 0.5-1.5 parts of a defoaming agent and 20-50 parts of elastic modified resin. According to the invention, the elastic modified resin is used as an admixture functional material for oil well cement and is mixed with the oil well cement for use, so the damage resistance of a cement sheath is enhanced, and the cement paste has the advantages of good stability, no sedimentation phenomenon, good fluidity, adjustable thickening time and low water loss, and meets the requirements of cementing construction operation.
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Description

technical field

[0001] The invention relates to the technical field of elastic modification of oil well cement, in particular to an elastic modified resin for oil well cement. Background technique

[0002] With the development of oil and gas fields, the cement sheath will be subjected to various loads such as the internal pressure transmitted by the casing, the confining pressure of the formation rock, the temperature strain caused by the temperature change of the wellbore, and the high pressure impact of the gas well during the drilling or production process. These effects will lead to changes in the stress state of the cement sheath sealing system, and in severe cases, the cement sheath sealing system will fail, interlayer channeling and casing damage will occur, and even the oil and gas well will be scrapped. Aiming at the risk of failure of cement in the wellbore, studies have shown that the cement slurry system with high elasticity and low modulus is the key to guarante...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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