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Circulated stable foams

A technology for stabilizing foam and stabilizer, applied in the foam field, can solve the problems of poor economy and applicability, environmental pollution, non-recyclable foam, etc., and achieve the effects of reducing operating costs, reducing environmental pollution, and strong oil resistance.

Active Publication Date: 2013-07-31
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the foam in the prior art cannot be recycled, so there are technical problems of serious environmental pollution, poor economy and applicability

Method used

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  • Circulated stable foams
  • Circulated stable foams

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The invention discloses a recyclable stable foam, which is composed of a base liquid and an antifoaming agent, wherein: the base liquid includes: 0.5-1.5 parts of a foaming agent, 0.1-0.3 parts of a stabilizer, 6- 8 parts of inhibitor, 1-3 parts of wetting reversal agent and 100 parts of water; the defoamer is silicone oil emulsion type defoamer, and the volume percentage of defoamer and base liquid is 0.066-0.068%. In this scheme, said foaming agent, stabilizer, inhibitor, wetting reversal agent and defoamer can adopt the existing products of various models common in the art, and the preparation method can adopt the existing products in the art. Conventional preparation methods in the art.

Embodiment 2

[0029] As a comparatively best embodiment of the present invention, adopt following scheme to have best effect through following test:

[0030] The base liquid includes in parts by weight: 1 part of foaming agent, 0.2 part of stabilizer, 7 parts of inhibitor, 2 parts of wetting reversal agent and 100 parts of water; the defoamer is silicone oil emulsion type defoamer The volume percentage of foaming agent, defoamer and base fluid is 0.067%. The silicone oil emulsion type defoamer refers to the organic emulsion silicon of the commercially available model YJR. Described foaming agent refers to the foaming agent that commercially available model is COA-30. Described stabilizer refers to sodium carboxymethylcellulose CMC. Described inhibitor refers to potassium chloride KCl. The described wetting reversal agent refers to a commercially available model of wetting reversal agent WD-1.

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Abstract

The invention discloses circulated stable foams and relates to the technical field of foams in industries such as petroleum and gas exploitation, mining, and the like. The circulated stable foams comprise a base fluid and a de-foaming agent, wherein the base fluid comprises following components in parts by weight: 0.5-1.5 parts of foaming agent, 0.1-0.3 parts of stabilizing agent, 6-8 parts of inhibitor, 1-3 parts of wetting reversal agent and 100 parts of water; the de-foaming agent is silicone oil emulsion type de-foaming agent; and the percent by volume of the base fluid and the de-foamingagent is 0.066-0.068%. By using the circulated stable foams provided by the invention, the economical efficiency and applicability of the foam drilling can be increased and stabilized and the environmental pollution caused by the foams can be reduced.

Description

technical field [0001] The invention relates to the technical field of foam used in industries such as oil and gas exploration and mining. Background technique [0002] The stable foam drilling technology has a remarkable effect in solving low-pressure and easy-to-leakage formations, and improving the ROP after gas drilling encounters formation water or oil production. The U.S. oil industry began to apply stable foam drilling technology in the 1960s. Domestic foam drilling technology started relatively late. Xinjiang Oilfield began to explore stable foam drilling in the 1980s, and Sichuan Oilfield, Liaohe Oilfield, and Shengli Oilfield began to study and apply it in the 1990s. Stabilized foam drilling is still generally used in one-time use in technology at present. It has disadvantages such as large volume of grit chamber, long defoaming time, high cost of foam materials, poor economy and easy pollution, which restricts further popularization and application. Therefore, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/38
Inventor 许期聪邓虎周长虹余锐黄宁生董仕明肖洲蒲刚
Owner BC P INC CHINA NAT PETROLEUM CORP
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