Foaming agent and circulation microvesicle drilling fluids and drilling technique

A process method and drilling fluid technology, applied in the field of drilling, can solve the problems of affecting the normal progress of drilling construction, increasing the difficulty of drilling construction, poor leakage prevention and plugging effect, etc., achieving good lubrication performance, improving drilling efficiency, and improving quality. Effect

Inactive Publication Date: 2008-08-20
CHINA UNIV OF GEOSCIENCES (BEIJING) +1
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Usually, the development of fractures and broken zones will form lost zones. During the drilling process, drilling fluid will leak from these lost zones, which will affect the normal drilling construction.
Especially in large-distance horizontal directional drilling

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] The preferred embodiment of the foaming agent of the present invention is that it includes the following two components: sodium dodecylbenzene sulfonate ABS and sodium dodecyl sulfate SDS. The weight percentages of the two components are respectively for:

[0039] Sodium dodecylbenzene sulfonate ABS: 20-40%, can be 20, 25, 30, 35, 40%, etc.;

[0040] Sodium dodecyl sulfate SDS: 60-80%, can be 60, 65, 70, 75, 80% and other proportions.

[0041] The foaming agent may also include a component: α-olefin sulfonate AOS. This situation is generally applied when the formation temperature is high, and the weight percentages of the three components are:

[0042] α-olefin sulfonate AOS: 10-30%, can be 10, 15, 20, 25, 30%, etc.;

[0043] Sodium dodecylbenzene sulfonate ABS: 20%-40%, can be 20, 25, 30, 35, 40%, etc.;

[0044] Sodium dodecyl sulfate SDS: 40%-60%, can be 40, 45, 50, 55, 60% and other proportions.

[0045] In the preferred embodiment of the recirculating microbubble drilli...

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PUM

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Abstract

The invention discloses a foaming agent and circulative micro-foam drilling fluid as well as well-drilling technological method; wherein, the foaming agent comprises 30% neopelex ABS, and 70% lauryl sodium sulfate SDS; the circulative micro-foam drilling fluid is produced through adding 0.1% sodium hydroxide, 0.2 to 0.3% xanthan gum XC, 0.2 to 0.3% medium viscosity flocculent cellulose CMC and 0.1 to 0.3% foaming agent; during well drilling construction, the circulative micro-foam drilling fluid is first to be prepared, and then is used to perform the wet drilling. With the foaming agent added to the circulative micro-foam drilling fluid, the formed micro-foam slurry has the advantages of good leakage proof and plugging effect, great lubrication performance, good rheology, obvious improved drilling quality and drilling efficiency.

Description

Technical field [0001] The invention relates to a drilling technology, in particular to a foaming agent, a circulated microbubble drilling fluid and a process method for using the drilling fluid for drilling. Background technique [0002] The structure of solid mineral stratum is extremely complicated due to the influence of its formation conditions. Usually, the development of cracks and broken zones will form leakage layers. During the drilling process, drilling fluid will leak from these leakage layers, which will affect the normal progress of drilling operations. Especially in the long-distance horizontal directional drilling, the problems of drilling fluid leakage and mud blowing have increased the difficulty of drilling construction. In the existing drilling technology, the leakage prevention and plugging effect of the drilling fluid is poor, which reduces the drilling efficiency. Summary of the invention [0003] The purpose of the present invention is to provide a foamin...

Claims

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Application Information

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IPC IPC(8): B01F17/10C09K8/14C09K8/38C09K23/10
Inventor 郑秀华夏柏如
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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