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Resin material, composite well repair material and well repair process

A technology of resin materials and process methods, which is applied in wellbore/well components, chemical instruments and methods, earthwork drilling and production, etc., and can solve the problems of cement construction broken, falling off, silicon cracking, etc.

Inactive Publication Date: 2012-09-12
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are problems such as crushing, falling off, silicon cracking, and annular blockage in cement construction.
The compressive strength of conventional cement is less than 30MPa, and the elastic modulus is 17-18GPa, indicating that its strength is not strong enough, its "plasticity" is not high enough, and the sealing effect after workover is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0017] Resin material of the present invention, its preferred embodiment is:

[0018] It includes the following components: water-based epoxy resin, polyamide and water, and the parts by weight of the three components are respectively:

[0019] Water-based epoxy resin: 20 parts by weight-33 parts by weight;

[0020] Polyamide: 32 parts by weight - 53 parts by weight;

[0021] Water: 17-86 parts by weight.

[0022] The preferred weight parts of described three kinds of components are respectively:

[0023] Waterborne epoxy resin: 33 parts by weight;

[0024] Polyamide: 53 parts by weight;

[0025] Water: 17 parts by weight.

[0026] Composite workover material of the present invention, its preferred embodiment is:

[0027] The composite workover material comprises hollow glass spheres and the resin material according to claim 1 or 2, and in the composite workover material, the hollow glass spheres and the resin material account for 10 parts by weight and 87 parts by weigh...

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Abstract

The invention discloses a resin material, a composite well repair material and a well repair process. The resin material comprises 20-33 parts by weight of waterborne epoxy resins, 32-53 parts by weight of polyamide and 17-86 parts by weight of water. The composite well repair material comprises 10 parts by weight of hollow glass spheres and 87-89 parts by weight of resin material. The well repair process adopting the composite well repair material has the following beneficial effects: the resisting temperature is 150 DEG C; the resisting pressure is 30MPa; and the modulus of elasticity is lower than 5GPa.

Description

technical field [0001] The invention relates to a repairing technology for casing damaged casing variable wells, in particular to a resin material, a composite workover material and a workover process. Background technique [0002] With the acceleration of oilfield development, the formation pressure imbalance caused by long-term water injection, polymer injection and formation movement has caused many oil and water wells to slip, causing the casing to shrink, bend or break due to multi-directional horizontal shear. The cement sheath of the well was broken, and the mudstone occupied the well diameter, so that the oil and water wells could not produce normally. At present, the number of faults and casing changes is increasing every year. According to incomplete statistics, there are more than 10,000 wells with similar conditions in Daqing Oilfield, especially in major oilfields. [0003] In the prior art, after the casing is damaged and the casing is deformed, the method of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/00C08L63/00C08K7/28C08K3/16C09K8/42E21B33/13
Inventor 杨浩储锦英
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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