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High-strength protective anti-sloughing liquid for well drilling

A high-strength, well-drilling technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve problems such as 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: 2015-09-23
徐迪青
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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 protection and anti-collapse fluid for high-strength drilling, said materials are composed by weight as follows: 0.5 part of cationic shale inhibitor, 0.2 part of foam stabilizer, and 0.2 part of sodium lauryl sulfate , 0.2 parts of fatty alcohol polyoxyethylene ether sodium sulfate, 0.05 parts of polyethylene glycol octylphenyl ether, 3 parts of anti-slumping agent, 3 parts of carboxymethyl starch, 1.5 parts of 1250 mesh calcium carbonate, and 60 parts of water.

Embodiment 2

[0008] Embodiment 2, a protection and anti-collapse fluid for high-strength drilling, said materials are composed by weight as follows: 0.4 part of cationic shale inhibitor, 0.15 part of foam stabilizer, and 0.15 part of sodium lauryl sulfate , 0.15 parts of fatty alcohol polyoxyethylene ether sodium sulfate, 0.045 parts of polyethylene glycol octylphenyl ether, 2.5 parts of anti-slumping agent, 2.5 parts of carboxymethyl starch, 1.25 parts of 1250 mesh calcium carbonate, and 50 parts of water.

Embodiment 3

[0009] Embodiment 3, a protection and anti-collapse fluid for high-strength drilling, said materials are composed by weight as follows: 0.3 part of cationic shale inhibitor, 0.1 part of foam stabilizer, and 0.1 part of sodium lauryl sulfate , 0.1 part of fatty alcohol polyoxyethylene ether sodium sulfate, 0.04 part of polyethylene glycol octylphenyl ether, 2 parts of anti-slumping agent, 2 parts of carboxymethyl starch, 1 part of 1250 mesh calcium carbonate, 40 parts of water.

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PUM

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Abstract

The invention relates to the technical field of petrochemicals, specifically to a high-strength protective anti-sloughing liquid for well drilling. The protective anti-sloughing liquid comprises the following materials, by weight, 0.3-0.5 part of a cation I shale inhibitor, 0.1-0.2 part of a foam stabilizer, 0.1-0.2 part of sodium dodecyl sulfate, 0.1-0.2 part of fatty alcohol polyoxyethylene ether sodium sulphate, 0.04-0.05 part of polyoxyethylene octyl phenyl ether, 2-3 parts of an anti-sloughing agent, 2-3 parts of carboxy methyl starch, 1-1.5 parts of 1250-mesh calcium carbonate and 40-60 parts of water. The invention aims to provide a high-strength protective anti-sloughing liquid which is used for well drilling and has advantages of simple technology and ideal performance.

Description

technical field [0001] The invention relates to the technical field of petrochemical products, in particular to a protection and anti-collapse fluid for high-strength 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 ...

Claims

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Application Information

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IPC IPC(8): C09K8/575C09K8/38C09K8/03
CPCC09K8/514C09K8/03C09K8/38
Inventor 徐迪青
Owner 徐迪青
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