Drilling collapse-prevention protectant

A protective agent and drilling technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of ineffective protection of the well wall and instability of the well wall, and achieve large foaming, small water loss, and easy The effect of control

Inactive Publication Date: 2016-07-06
田建频
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ordinary foam cannot effectively protect the well wall during drilling, and it is easy to cause the well wall to become unstable. For the upper mudstone formation, under the condition of uneven stress on the well wall, foam may cause collapse due to hydration. Therefore, it is necessary to Provide an anti-collapse fluid to effectively protect the well wall

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Embodiment 1, a kind of anti-collapse protection agent for drilling, described each material by following weight components: 60 parts of petroleum asphalt, 8 parts of sodium hydroxide, 6 parts of potassium carbonate, 3 parts of anhydrous aluminum trichloride, carboxymethyl 3 parts of starch, 0.2 part of sodium lauryl sulfate, 0.05 part of polyethylene glycol octylphenyl ether, and 8 parts of ammonia water.

Embodiment 2

[0008] Embodiment 2, a kind of anti-collapse protection agent for drilling, described each material by following weight components: 40 parts of petroleum asphalt, 4 parts of sodium hydroxide, 4 parts of potassium carbonate, 2 parts of anhydrous aluminum trichloride, carboxymethyl 2 parts of starch, 0.1 part of sodium lauryl sulfate, 0.04 part of polyethylene glycol octylphenyl ether, and 4 parts of ammonia water.

Embodiment 3

[0009] Embodiment 3, a kind of drilling anti-slump protection agent, described each material by following weight components: 50 parts of petroleum asphalt, 6 parts of sodium hydroxide, 5 parts of potassium carbonate, 2.5 parts of anhydrous aluminum trichloride, carboxymethyl 2.5 parts of starch, 0.15 parts of sodium lauryl sulfate, 0.045 parts of polyethylene glycol octylphenyl ether, and 6 parts of ammonia water.

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PUM

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Abstract

The present invention relates to the technical field of petrochemical products, and specifically relates to a drilling collapse-prevention protectant. The drilling collapse-prevention protectant comprises the following components by weight: 40-60 parts of petroleum asphalt, 4-8 parts of sodium hydroxide, 4-6 parts of potassium carbonate, 2-3 parts of anhydrous aluminum trichloride, 2-3 parts of carboxymethyl starch, 0.1-0.2 part of sodium lauryl sulfate, 0.04-0.05 part of polyethylene glycol octylphenyl ether and 4-8 parts of ammonia. Object of the present invention is to provide a simple-process strong-stability drilling collapse-prevention protectant.

Description

technical field [0001] The invention relates to the technical field of petrochemical products, in particular to an anti-collapse protection agent for drilling. Background technique [0002] Due to the massive exploitation of oil and gas, there is less and less oil and gas in shallow layers, and oil and gas exploration is developing in depth. With the increase of oil and gas drilling depth, the well wall becomes more and more unstable, and the protection of oil and gas layers becomes more and more difficult, which seriously affects the drilling construction progress and oil and gas well production efficiency. As we all know, drilling fluid is a circulating fluid used in the drilling process, often called drilling blood. Its function is mainly to clean the bottom of the well, carry cuttings, protect the wall to plug leakage, cool and lubricate the drill bit, etc. With the increase of drilling depth, the increase of wellbore instability and the difficulty of oil and gas layer...

Claims

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Application Information

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IPC IPC(8): C09K8/38
Inventor 田建频
Owner 田建频
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