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A high-strength ductile plugging agent

A technology of ductility and plugging agent, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of low plugging time efficiency, low plugging pressure bearing capacity, poor plugging ability, etc., to achieve product without Toxicity, high compressive strength and ductility, high acid solubility

Active Publication Date: 2018-09-14
KMS OIL FIELD CHEM & TECHNICAL SERVICES LTD BEIJING +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(2) Leakage caused by induced fracturing
However, when the conventional LCM plugging method and special plugging method introduced above are applied in practice, the plugging ability is poor, the plugging time is low, and the plugging pressure bearing capacity is low.

Method used

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  • A high-strength ductile plugging agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Prepare raw materials:

[0044] Aluminum powder 55g; expandable graphite 12g; silicon carbide 3g; calcium oxide 10g; floating beads 10g; barium carbonate 3g; and manganese dioxide 0.5g;

[0045] Wherein, the particle size of the aluminum powder is 200-400 μm.

[0046] (2) Add aluminum powder into the crucible and heat to 720°C to completely melt the raw material.

[0047] (3) expandable graphite and silicon carbide are pulverized to an average particle size of 150-300 μm with a ball mill; then the pulverized expandable graphite and silicon carbide are added to the aluminum melt of step (2) to make the expandable graphite and silicon carbide The silicon carbide powder is evenly distributed in the melt and kept at 700°C for 10 minutes.

[0048] (4) Calcium oxide, floating beads, barium carbonate, and manganese dioxide are pulverized and mixed evenly. The average particle diameter of calcium oxide, floating beads, barium carbonate, and manganese dioxide is 50-200 μm....

Embodiment 2

[0052] (1) Prepare raw materials:

[0053] 60g of aluminum powder; 15g of expandable graphite; 5g of silicon carbide; 10g of calcium oxide; 10g of floating beads; 3g of barium carbonate; and 0.6g of manganese dioxide;

[0054] Wherein, the particle size of the aluminum powder is 200-400 μm.

[0055] (2) Add aluminum powder into the crucible and heat to 750°C to completely melt the raw material.

[0056] (3) expandable graphite and silicon carbide are pulverized to an average particle size of 150-300 μm with a ball mill; then the pulverized expandable graphite and silicon carbide are added to the aluminum melt of step (2) to make the expandable graphite and silicon carbide The silicon carbide powder is evenly distributed in the melt, and kept at 710°C for 10 minutes.

[0057] (4) Calcium oxide, floating beads, barium carbonate, and manganese dioxide are pulverized and mixed evenly. The average particle diameter of calcium oxide, floating beads, barium carbonate, and manganese...

Embodiment 3

[0061] (1) Prepare raw materials:

[0062] 45g of aluminum-magnesium alloy powder; 10g of expandable graphite; 2g of silicon carbide; 8g of calcium oxide; 8g of floating beads; 3g of barium carbonate; and 0.5g of manganese dioxide;

[0063] Wherein, the particle size of the aluminum-magnesium alloy powder is 200-400 μm.

[0064] (2) Add aluminum powder into the crucible and heat to 710°C to completely melt the raw material.

[0065] (3) expandable graphite and silicon carbide are pulverized to an average particle size of 150-300 μm with a ball mill; then the pulverized expandable graphite and silicon carbide are added to the aluminum melt of step (2) to make the expandable graphite and silicon carbide The silicon carbide powder is evenly distributed in the melt and kept at 700°C for 10 minutes.

[0066] (4) Calcium oxide, floating beads, barium carbonate, and manganese dioxide are pulverized and mixed evenly. The average particle diameter of calcium oxide, floating beads, ba...

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Abstract

The invention discloses a high strength ductility plugging agent which comprises, by weight parts, 40-65 parts of aluminum or aluminum alloy powder, 10-15 parts of expansile graphite, 1-5 parts of silicon carbide, 5-15 parts of calcium oxide, 5-15 parts of floating beads, 1-5 parts of barium carbonate and 0.1-1 part of manganese dioxide. The plugging agent comprises the aluminum or aluminum alloy ingredient, has a bridging effect, is high in strength and acid solubility and resistant to salt and high temperature and can be applied to fresh water, saline water and seawater drilling fluid.

Description

technical field [0001] The invention relates to the technical field of oil well operation plugging, in particular to a high-strength ductile plugging agent. Background technique [0002] Lost circulation refers to a complex situation in which the working fluid (drilling fluid, workover fluid, cement slurry, etc.) in the well leaks into the formation during the drilling and workover of oil and gas exploration and development. The intuitive manifestation of lost circulation is the drop of the liquid level of the surface mud tank, or no drilling fluid returns from the wellhead, or the return of drilling fluid from the wellhead is less than the displacement of drilling fluid (excluding normal downhole consumption). The hazards of lost circulation include: loss of a large amount of drilling fluid, even making drilling impossible to maintain; consumption of a large amount of plugging materials; time-consuming drilling; affecting the normal progress of geological logging work; may ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/46
CPCC09K8/426C09K8/46C09K2208/18
Inventor 张宁吕述奇张宇
Owner KMS OIL FIELD CHEM & TECHNICAL SERVICES LTD BEIJING
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