Leak-proof leak-stopping cement mortar

A mud and leak-proof technology, which is applied in the field of cement slurry and leak-proof plugging cement slurry, can solve the problems of large water loss, narrow application range, poor product performance indicators, etc., and achieve the goal of improving pressure bearing capacity and plugging effect Effect

Inactive Publication Date: 2008-08-27
DAQING PETROLEUM ADMINISTRATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The leak-proof cementing technology at home and abroad has achieved rapid development. For leak-prone well cementing, the main method in the past is to reduce the cement slurry density to prevent cementing leakage. Ordinary low-density cement slurry systems are common. Cement stone has the disadvantages of low compressive strength (7-14MPa), large water loss (500-1000ml), and poor suspension stability of the system. The only way to prevent leakage is to reduce the liquid column pressure alone. Leaky layer is difficult to prevent cementing loss
Poor product performance index, narrow scope of application, it is difficult to meet the quality requirements of target layer sealing in production practice, affecting the quality of cementing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0006] The present invention will be further described below:

[0007] Prepare three kinds of cement slurry of the present invention below and carry out performance test: experimental method is as follows:

[0008] Testing standard: GB10238-2005 and API standard

[0009] Testing instruments: density meter, press, thickener, water loss meter, etc.

[0010] Density: Measured with a density meter after preparing the grout.

[0011] Fluidity test: the experimental instrument consists of a cone (with a capacity of 120cm 3 ), composed of concentric glass plates. Place the cone on a horizontal glass plate so that the lower edge of the cone coincides with the smallest circle of many concentric circles on the glass plate. Prepare a cement slurry with a certain water-cement ratio, pour it into the cone, and scrape the surface. Lift the cone vertically quickly. After the cement slurry is pushed away, take the average value of the two perpendicular diameters, which is the flow of the ...

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Abstract

The invention relates to a leakage-blokage proof slurry product, which is composed of 100 portions of cement, 70 portions of water, 5-20 portions of floating bead, 5-10 portions of micro silicon, 3-10 portions of carbon fiber, 0.5-2 portions of calcium chloride or potassium chloride and 4-7 portions of sodium silicate. The leakage-blokage proof slurry product has better leakage-blockage resistance to seal leakage layer.

Description

Technical field: [0001] The invention relates to a cement slurry in the field of oil field drilling, in particular to a leakage prevention and plugging cement slurry. Background technique: [0002] The leak-proof cementing technology at home and abroad has achieved rapid development. For leak-prone well cementing, the main method in the past was to reduce the cement slurry density to prevent cementing leakage. Ordinary low-density cement slurry systems are common. Cement has the disadvantages of low compressive strength (7-14MPa), large water loss (500-1000ml), and poor suspension stability of the system. The only way to prevent leakage is to reduce the liquid column pressure alone. It is difficult for the leakage layer to prevent cementing leakage. The performance index of the product is poor, and the scope of application is narrow. In production practice, it is difficult to meet the quality requirements for sealing the target layer, which affects the quality of cementing....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02C04B14/38C04B18/14C04B22/12
CPCC04B2111/00241C04B28/02Y02W30/91C04B12/04C04B18/027C04B18/146C04B22/124
Inventor 范廷秀姜开文郑琦明胡伟于贵财
Owner DAQING PETROLEUM ADMINISTRATION
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