Positive-charged polyglycol anti-collapse drilling fluid

A positively charged polyalcohol and drilling fluid technology, which is applied in the direction of drilling compositions, chemical instruments and methods, can solve the problems of narrow application range and weak anti-collapse ability of water-based drilling fluid, and achieve enhanced calcium pollution ability, Remarkable anti-collapse effect and strong anti-collapse ability

Inactive Publication Date: 2015-11-11
CHENGDU GAOPU PETROLEUM ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problem of weak anti-slump ability and narrow application range of water-based drilling fluid in the prior art, and provide a kind of anti-slump ability with strong anti-slump ability, long stability period, strong temperature resistance ability, large solid phase capacity and wide application range. Wide positive charge polyalcohol anti-slump drilling fluid

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A positively charged polyalcohol anti-slump drilling fluid, comprising the following components in parts by weight:

[0026] Sodium bentonite, 2-4 parts; sodium carbonate, 0.1-0.2 parts; positively charged polyalcohol, 3-5 parts; macromolecular inhibitor, 2-4 parts; positively charged wall protector, 2-4 parts; for drilling fluid Coating agent, 0.2-0.8 parts; fluid loss reducer for drilling fluid, 0.5-3 parts; plugging agent for drilling fluid, 1-2 parts; low fluorescence water-based lubricant RY-838, 4-6 parts; Fluorescent sulfonated asphalt, 2-3 parts; water, 100 parts; make the density of the drilling fluid reach 1.23-1.36g / cm through deployment of weighting agent 3 .

[0027] The concrete parts by weight of above-mentioned each composition in the present embodiment are as follows:

[0028] Sodium bentonite, 3 parts; Sodium carbonate, 0.2 parts; Positively charged polyalcohol, 4 parts; Macromolecule inhibitor, 3 parts; Positively charged wall protection agent, 3 pa...

Embodiment 2

[0036] The difference between this embodiment and embodiment 1 is only that the parts by weight of the components are different, and the specific settings are as follows:

[0037] As another preferred arrangement, the present invention includes the following components in parts by weight:

[0038] Sodium bentonite, 4 parts; Sodium carbonate, 0.1 part; Positively charged polyalcohol, 5 parts; Macromolecule inhibitor, 2 parts; Positively charged wall protection agent, 4 parts; Fluid loss reducer, 1.5 parts; plugging agent for drilling fluid, 2 parts; low-fluorescence water-based lubricant RY-838, 5 parts; low-fluorescence sulfonated asphalt, 2 parts; The density reaches 1.32g / cm 3 .

Embodiment 3

[0040] The difference between this embodiment and embodiment 1 is that the density of the drilling fluid is different, and the density of the drilling fluid in the present embodiment is 1.28g / cm 3 .

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Abstract

The invention discloses a positive-charged polyglycol anti-collapse drilling fluid which mainly solves the problems of low anti-collapse capacity and narrow application range in the water-based drilling fluid in the prior art. The positive-charged polyglycol anti-collapse drilling fluid comprises the following components in parts by weight: 2-4 parts of sodium bentonite, 0.1-0.2 part of sodium carbonate, 3-5 parts of positive-charged polyglycol, 2-4 parts of high-molecule inhibitor, 2-4 parts of positive-charged wall protector, 0.5-3 parts of fluid loss additive for drilling fluids, 1-2 parts of plugging agent for drilling fluids, 4-6 parts of low-fluorescence water-based lubricant RY-838, 2-3 parts of low-fluorescence sulfonated asphalt and 100 parts of water. By blending the weighting agent, the density of the drilling fluid reaches 1.30-1.45 g/cm<3>. The positive-charged polyglycol anti-collapse drilling fluid has the advantages of high anti-collapse capacity, longer stability period, high temperature resistance, high solid-phase content, wide application range and the like.

Description

technical field [0001] The invention relates to an anti-slump drilling fluid, in particular to a positively charged polyalcohol anti-slump drilling fluid. Background technique [0002] Drilling fluid is the circulating flushing medium used in the hole during the drilling process. Drilling fluid is the blood of drilling, also known as drilling flushing fluid. Its main functions include cleaning the borehole, stabilizing the borehole wall, cooling the drill bit, balancing formation pressure, and lubricating the drill string and drill bit. [0003] Drilling fluid can be divided into clear water, mud, clay-free flushing fluid, emulsion, foam and compressed air according to its composition. Clear water is the earliest drilling fluid, it does not need to be treated, it is easy to use, and it is suitable for areas with complete rock formations and sufficient water sources. Mud is a widely used drilling fluid. It is mainly suitable for unstable rock formations with loose walls, d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/24
CPCC09K8/24
Inventor 周斌
Owner CHENGDU GAOPU PETROLEUM ENG TECH
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