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Composite well wall stabilizer

A wellbore stabilizer and stabilizer technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve environmental impact and other problems, achieve the effects of improving quality, protecting wellbore walls, and reducing comprehensive drilling costs

Active Publication Date: 2014-07-23
库尔勒明洋工贸有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The formula involved in this method contains a large amount of sulfonated asphalt components, and a large amount of use has a great impact on the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Raw materials by weight percentage: Potassium trimethylsilicate powder 10% Phoebe powder 35% Paraffin wax 30% Graphite powder 25%

[0027] The mass percent purity of the described potassium trimethylsilicate powder is 90%; the mass percent purity of the described Phoebe powder is 90%;

[0028] The paraffin wax is No. 62 paraffin wax meeting the national standard; the graphite powder is a scaly powder, and the mass percent purity of carbon is 93%.

[0029] Grind paraffin wax into 100-mesh fine powder at low temperature, accurately measure the four raw materials according to the above weight ratio, place them in a double-helix material mixer and stir for 20 minutes to obtain the product.

[0030] After use test: core hydration expansion rate: 51%; mud water loss: 22ml.

Embodiment 2

[0032] Raw materials by weight percentage: Potassium trimethylsilicate powder 40% Phoebe powder 15% Paraffin wax 20% Graphite powder 25%

[0033] Grind paraffin wax into 100-mesh fine powder at low temperature, accurately measure the four raw materials according to the above weight ratio, place them in a double-helix material mixer and stir for 20 minutes to obtain the product.

[0034] The mass percent purity of the described potassium trimethylsilicate powder is 90.5%; the mass percent purity of the described Phoebe powder is 91%;

[0035] The paraffin wax is No. 62 paraffin wax meeting the national standard; the graphite powder is a scaly powder, and the mass percent purity of carbon is 94%.

[0036] After use test: core hydration expansion rate: 21%; mud water loss: 28ml.

Embodiment 3

[0038] Raw materials calculated by weight percentage: Potassium trimethylsilicate powder 20% Phoebe powder 20% Paraffin wax 45% Graphite powder 15%

[0039] Grind paraffin wax into 100-mesh fine powder at low temperature, accurately measure the four raw materials according to the above weight ratio, place them in a double-helix material mixer and stir for 20 minutes to obtain the product.

[0040] The mass percent purity of the described potassium trimethylsilicate powder is 92%; the mass percent purity of the described Phoebe powder is 90.5%;

[0041] The paraffin wax is No. 58 paraffin wax meeting the national standard; the graphite powder is a scaly powder, and the mass percent purity of carbon is 93.5%.

[0042] After use test: core hydration expansion rate: 30%; mud water loss: 28ml.

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PUM

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Abstract

The invention discloses a composite well wall stabilizer which is prepared from the following components in percentage by weight: 10-40% of trimethyl potassium silicate powder, 15-35% of nanmu powder, 20-45% of paraffin and 15-25% of graphite powder. The invention has the following beneficial effects: the trimethyl potassium silicate powder and the nanmu powder are used as mutually synergistic main components, and the paraffin and the graphite are used as auxiliary components; when being used in water-based mud (including brine water mud), the composite well wall stabilizer can effectively inhibit the hydration and expansion of shale, improve the quality of mud cakes, enable the mud cakes to be compact, tough and lubricating and stabilize the well wall on the mud shale layer; and meanwhile, the composite well wall stabilizer has plugging action on the microcrack-developing stratum, and enables the stratum to be stable and less prone to collapse, thus achieving the effect of protecting the well wall. By using the stabilizer, well drilling accidents are reduced, and the comprehensive well drilling cost is lowered.

Description

technical field [0001] The invention relates to a stabilizer, in particular to a composite borehole wall stabilizer. Background technique [0002] At present, in the drilling engineering, the well wall is unstable, which will lead to drilling difficulties or accidents. In order to reduce accidents, some corresponding chemical additives are sometimes added to the mud. Commonly used chemical agents to inhibit shale expansion, such as: calcium chloride, potassium chloride, sodium silicate and other inorganic salts; potassium polyacrylamide (KPAM), acrylic copolymer, asphalt, emulsified asphalt, sulfonated asphalt , humic acid, potassium humate (KHm), etc. Among them, the inorganic salt products have a single effect during use and are added in large amounts, which are likely to have adverse effects on other types of drilling fluid treatment agents. For example, inorganic salts can cause salting out of some polymer treatment agents and lose or reduce the use effect; Asphalt pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/514
Inventor 范树坡谢树军杜培强
Owner 库尔勒明洋工贸有限责任公司
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