Oil well cement leak-proof toughening agent

A technology of oil well cement and toughening agent, which is applied in the direction of drilling composition, chemical instruments and methods, etc., can solve the problems of cement stone inherent brittleness, cement slurry leakage, etc., and achieve the improvement of cement stone toughness, cement toughness improvement, preparation The effect of simple process

Inactive Publication Date: 2009-07-15
NANJING UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide an oil well cement leak-proof toughening agent to solve the deficiencies in the prior art. The oil well cement leak-proof toughening agent not only has the leak-proof function but also can improve the toughness of cement stone, and has good comprehensive engineering performance , one agent with double effects, simultaneously solving the technical problems of cement slurry loss and inherent brittleness of cement stone in the cementing process

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0024] The raw materials are weighed according to the following weight ratio, and the product of the present invention is obtained after uniform mixing. The test results are shown in Table 1.

[0025] Modified polypropylene profiled fiber 25kg, its diameter is 20μm, elastic modulus is 15GPa, length-diameter ratio is 500;

[0026] 50kg of special inorganic fiber, made of basalt by 1550℃ melt drawing, the diameter of the made is 10μm, the elastic modulus is 20GPa, and the aspect ratio is 350;

[0027] Polyoxyethylene ether 7kg, its average molecular weight is 3 million;

[0028] 10kg of modifier, including 2kg of polyoxyethylene lauryl ether and 8kg of SXY drag reducer produced by Chengdu Chuanfeng Chemical Engineering Co., Ltd.;

[0029] Amphibole 8kg, length to diameter ratio of 150, of which SiO 2 The content is 55%, Al 3 O 2 The content is 35%.

Embodiment 2

[0031] The raw materials are weighed according to the following weight ratio, and the product of the present invention is obtained after uniform mixing. The test results are shown in Table 1.

[0032] 10kg of polyester special-shaped fiber, its diameter is 30μm, elastic modulus is 5GPa, length-diameter ratio is 200; special inorganic fiber 70kg, made of sepiolite melted and drawn at 1300℃, the diameter is 5μm, elastic The modulus is 15 GPa and the aspect ratio is 600;

[0033] 10kg of modified polyvinyl alcohol, with an average molecular weight of 1 million;

[0034] Modifier 5kg, including 4kg polyoxyethylene lauryl ether and 1kg SXY drag reducer produced by Chengdu Chuanfeng Chemical Engineering Co., Ltd.;

[0035] Wollastonite 5kg, aspect ratio of 80, SiO 2 The content of 50%, Al 3 O 2 The content is 30%.

Embodiment 3

[0037] The raw materials are weighed according to the following weight ratio, and the product of the present invention is obtained after uniform mixing. The test results are shown in Table 1.

[0038]30kg of modified polypropylene profiled fiber, with a diameter of 20μm, an elastic modulus of 15GPa, and a length-to-diameter ratio of 800;

[0039] Special inorganic fiber 50kg, made of sepiolite melted and drawn at 1750℃, with a diameter of 10μm, an elastic modulus of 20GPa, and a length-to-diameter ratio of 500;

[0040] Polyoxyethylene ether 2kg, its average molecular weight is 3 million;

[0041] 15kg of modifier, including 3kg of polyoxyethylene lauryl ether and 12kg of SXY drag reducer produced by Chengdu Chuanfeng Chemical Engineering Co., Ltd.;

[0042] Amphibole 3kg, length-to-diameter ratio is 150, of which SiO 2 The content is 55%, Al 3 O 2 The content is 35%.

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Abstract

The invention discloses an oil-well cement leakage-proof toughener which not only has leakage-proof function and improves the toughness of cement rocks, but also has good multiple-purpose project performance, so as to have double effects and solve the technical problems of slurry loss and the inherent brittleness of the cement rocks in the process of well cementation; the oil-well cement leakage-proof toughener comprises the components based on the weight percentage: 5-30% of organic fiber material, 35-70% of special type inorganic fiber, 1.0-10% of organic polymer material, 5.0-15% of modifying agent and 1.0-10% of auxiliary material.

Description

Technical field [0001] The invention relates to a toughening agent, more specifically to a leak-proof toughening agent for oil well cement. Background technique [0002] Cementing operation is a key link in drilling and completion operations. It not only means the end of drilling operations with an investment of several million to hundreds of millions of yuan, but also marks the beginning of oil production operations that have continued for decades. It is an important engineering link that connects the past and the next. The quality of cementing is directly related to the production life of oil and gas wells and the improvement of oil and gas recovery. Different types of oil well cement are the main materials for oil and gas well cementing construction, and their inherent three high defects (high volume shrinkage, high Brittleness and high fluid loss) and lost circulation problems have always been the main causes of poor cementing quality, short life and oil and gas resource loss...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/467
Inventor 姚晓吴叶成樊松林张峰许仲梓唐明述
Owner NANJING UNIV OF TECH
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