Fluid loss additive for drilling fluids and preparation method thereof

A technology of fluid loss control agent and drilling fluid, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of high temperature resistance, acid and alkali resistance and other requirements that cannot be met, and achieve excellent fluid loss control performance, good Acid and alkali resistance, good filtration loss reduction effect

Inactive Publication Date: 2015-01-28
SUZHOU CHANGSHENG ELECTROMECHANICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although some improvements have been made to the fluid loss reducer in the above prior art, and the effect has been enhanced, the increasingly high temperature resistance, acid and alkali resistance requirements of deep well drilling fluids still cannot be met, and there is still no one that can be used in A fluid loss control agent with stable performance used under high temperature conditions over 300°C

Method used

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  • Fluid loss additive for drilling fluids and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A fluid loss reducer for drilling fluid, comprising, by weight components: 8 parts of ethylene glycol dimethacrylate, 2 parts of zinc stearate, 5 parts of dioctyl phthalate, and 3 parts of dicyclohexylamine , 6 parts of polyisobutylene, 2 parts of talc, 1 part of titanate, 5 parts of sodium benzoate, 2 parts of carboxymethyl cellulose, 3 parts of sodium dihydrogen phosphate, 6 parts of acrylic acid, 0.5 parts of organohydrogenpolysiloxane , 40 parts of water.

[0023] The preparation method of the above-mentioned drilling fluid fluid loss reducer, the steps are as follows:

[0024] Step 1, add ethylene glycol dimethacrylate, dioctyl phthalate and polyisobutylene into the reaction kettle, heat to 70°C, stir and mix evenly, the stirring speed is 200 rpm, and then add bicyclic Hexylamine and sodium benzoate were stirred and reacted for 40 minutes, wherein the stirring speed was 80 rpm to obtain mixture 1;

[0025] Step 2: Add titanate and carboxymethyl cellulose into mix...

Embodiment 2

[0028] A fluid loss reducer for drilling fluid, comprising: 10 parts of ethylene glycol dimethacrylate, 3 parts of zinc stearate, 6 parts of dioctyl phthalate, and 4 parts of dicyclohexylamine in terms of weight components , 8 parts of polyisobutylene, 3 parts of talc, 3 parts of titanate, 6 parts of sodium benzoate, 4 parts of carboxymethyl cellulose, 4 parts of sodium dihydrogen phosphate, 9 parts of acrylic acid, 0.8 parts of organohydrogenpolysiloxane , 50 parts of water.

[0029] The preparation method of the above-mentioned drilling fluid fluid loss reducer, the steps are as follows:

[0030] Step 1, add ethylene glycol dimethacrylate, dioctyl phthalate and polyisobutylene into the reaction kettle, heat to 75°C, stir and mix evenly, the stirring speed is 220 rpm, and then add bicyclic Hexylamine and sodium benzoate were stirred and reacted for 48 minutes, wherein the stirring speed was 90 rpm to obtain mixture 1;

[0031] Step 2: Add titanate and carboxymethyl cellulos...

Embodiment 3

[0034]A fluid loss reducer for drilling fluid, comprising by weight components: 12 parts of ethylene glycol dimethacrylate, 4 parts of zinc stearate, 7 parts of dioctyl phthalate, and 5 parts of dicyclohexylamine , 10 parts of polyisobutylene, 5 parts of talc, 4 parts of titanate, 8 parts of sodium benzoate, 7 parts of carboxymethyl cellulose, 5 parts of sodium dihydrogen phosphate, 12 parts of acrylic acid, 1.2 parts of organohydrogenpolysiloxane , 55 parts of water.

[0035] The preparation method of the above-mentioned drilling fluid fluid loss reducer, the steps are as follows:

[0036] Step 1, add ethylene glycol dimethacrylate, dioctyl phthalate and polyisobutylene into the reaction kettle, heat to 78°C, stir and mix evenly, the stirring speed is 260 rpm, and then add bicyclic Hexylamine and sodium benzoate were stirred and reacted for 55 minutes, wherein the stirring speed was 100 rpm to obtain mixture 1;

[0037] Step 2: Add titanate and carboxymethyl cellulose into ...

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Abstract

The invention discloses a fluid loss additive for drilling fluids and a preparation method thereof. The fluid loss additive comprises the following components: ethylene glycol bis methacrylate, zinc stearate, dioctyl phthalate, bicyclohexylamine, polyisobutylene, talcum powder, titanate, sodium benzoate, carboxymethyl cellulose, sodium dihydrogen phosphate, acrylic acid, organic hydropolysiloxane and water. The preparation method comprises the following steps: adding the ethylene glycol bis methacrylate, dioctyl phthalate and polyisobutylene into a reaction kettle, heating and uniformly mixing, adding the bicyclohexylamine and sodium benzoate, stirring to react, adding the titanate and carboxymethyl cellulose, uniformly mixing, adding the organic hydropolysiloxane, heating and stirring uniformly, adding the zinc stearate, talcum powder and acrylic acid, uniformly mixing, and finally, adding the sodium dihydrogen phosphate water solution in batches in a heating and stirring state. The fluid loss additive disclosed by the invention has the characteristics of favorable high-temperature stability, acid / alkali resistance, salt tolerance and excellent fluid loss reducing effect.

Description

technical field [0001] The invention belongs to reagents for oil field drilling, in particular to a fluid loss reducer for drilling fluid and a preparation method thereof. Background technique [0002] During the drilling process, due to the pressure difference, the water in the drilling fluid will inevitably leak into the formation through the wellbore wall, causing the drilling fluid to lose water. As the water enters the formation, the clay particles in the drilling fluid adhere to the well wall to form a "filter cake", forming a filter cake well wall. Since the well wall of the filter cake is much denser than the original well wall, on the one hand, it prevents the drilling fluid from further dehydration, and on the other hand, it plays a role in protecting the well wall. However, during the formation of the filter cake wall, too much water is lost by filtration, the filter cake is too thick, and fine clay particles enter the formation with water, which will affect norm...

Claims

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Application Information

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IPC IPC(8): C09K8/035
CPCC09K8/03
Inventor张学平朱忠海
OwnerSUZHOU CHANGSHENG ELECTROMECHANICAL