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Oil well cement retarder with high-temperature controlled-release and delayed-coagulation groups

A technology of retarding group, oil well cement, applied in drilling compositions, chemical instruments and methods, etc., can solve the problem of slow development of cement stone strength, inversion of cement stone strength and temperature during thickening time, limited retardation ability, etc. question

Inactive Publication Date: 2014-07-16
兰德(廊坊)石化环保设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the enhanced retarding ability is limited, and it is necessary to compound organic phosphonic acid and its salts to enhance the retarding ability of the retarder. However, the compounded retarder has a large amount at high temperature (> 135 ° C), and there are two The composite effect of the retarder makes the strength of cement stone develop slowly, and there will also be an inversion phenomenon between the thickening time of cement slurry or the strength and temperature of cement stone, that is, the same cement slurry formula, under the condition of temperature > 135 ℃, The higher the value, the longer the cement slurry thickens, and the lower the strength of cement stone, this phenomenon is often one of the reasons for gas channeling

Method used

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  • Oil well cement retarder with high-temperature controlled-release and delayed-coagulation groups

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Carry out the preparation of retarder according to the following main steps:

[0029] Step 1: Weigh four raw materials in molar ratio:

[0030] Itaconic acid: hydroxyethyl methacrylate: ditrimethylolpropane acrylate: 2-acrylamide-2-methylpropanesulfonic acid is 1.0: 2.0: 0.5: 0.1: 8.0;

[0031] Step 2: Add ditrimethylolpropane acrylate into hydroxyethyl methacrylate and fully dissolve;

[0032] Step 3: Calculate the amount of water according to the 10% solution, and add it to the reaction kettle;

[0033] Step 4: Add the solution prepared in step 2, itaconic acid and 2-acrylamide-2-methylpropanesulfonic acid into the reaction kettle, mix and dissolve;

[0034] Step 5: Warm the solution in the reactor to 75°C;

[0035] Step 6: Add ammonium persulfate in an amount of 0.1% of the solution in the reactor, and control the reaction temperature to 75° C. during the reaction; the reaction time is 1.0 hour.

[0036] Step 7: After the reaction is completed, add hydroquinone w...

Embodiment 2

[0038] Carry out the preparation of retarder according to the following main steps:

[0039] Step 1: Weigh four raw materials in molar ratio:

[0040] Itaconic acid: hydroxyethyl methacrylate: ditrimethylolpropane acrylate: 2-acrylamide-2-methylpropanesulfonic acid is 1.5: 3.0: 1.0: 0.5: 10.0;

[0041] Step 2: Add ditrimethylolpropane acrylate into hydroxyethyl methacrylate and fully dissolve;

[0042] Step 3: Calculate the amount of water according to the 28% solution, and add it to the reactor;

[0043] Step 4: Add the solution prepared in step 2, itaconic acid and 2-acrylamide-2-methylpropanesulfonic acid into the reaction kettle, mix and dissolve;

[0044] Step 5: heating the solution in the reactor to 80°C;

[0045] Step 6: Add ammonium persulfate in an amount of 0.2% of the solution in the reactor, and control the reaction temperature to 90° C. during the reaction; the reaction time is 1.5 hours.

[0046] Step 7: After the reaction is completed, add hydroquinone with...

Embodiment 3

[0048] Carry out the preparation of retarder according to the following main steps:

[0049] Step 1: Weigh four raw materials in molar ratio:

[0050] Itaconic acid: hydroxyethyl methacrylate: trimethylolpropane triacrylate: 2-acrylamide-2-methylpropanesulfonic acid is 1.0: 2.0: 0.5: 0.1: 8.0;

[0051] Step 2: Add trimethylolpropane triacrylate into hydroxyethyl methacrylate and fully dissolve;

[0052] Step 3: Calculate the amount of water according to the 10-18% solution, and add it to the reaction kettle;

[0053] Step 4: Add the solution prepared in step 2, itaconic acid and 2-acrylamide-2-methylpropanesulfonic acid into the reaction kettle, mix and dissolve;

[0054] Step 5: Warm the solution in the reactor to 75°C;

[0055] Step 6: Add ammonium persulfate in an amount of 0.1% of the solution in the reactor, and control the reaction temperature to 75° C. during the reaction; the reaction time is 1.0 hour.

[0056]Step 7: After the reaction is completed, add hydroquino...

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PUM

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Abstract

The invention discloses an oil well cement retarder with high-temperature controlled-release and delayed-coagulation groups. The oil well cement retarder comprises the following raw materials: itaconic acid, hydroxyethyl methylacrylate, 2-acrylamide-2-methallyl sulfonate, and one methylolpropane acrylate compound with two or more alkene unsaturated bonds. The invention further discloses a production method of the oil well cement retarder. The influence of cement paste thickening time of the retarder synthesized in the invention on temperature is insensitive; the thickening time at high temperature meets the construction requirement, and the strength of the set cement can be more rapidly developed under conditions of low temperature, medium temperature and high temperature. The retarder synthesized in the invention can be used in well cementation of a sealing section.

Description

technical field [0001] The invention relates to an oil well cement additive, in particular to an oil well cement retarder with a high-temperature slow-release retarding group used for high-temperature and high-pressure formation cementing in the oil well cementing process and a synthesis method thereof. Background technique [0002] In the cementing operation of oil and gas wells, the cement slurry is pumped into the well by pumping, and the cement slurry is replaced into the annular space between the casing and the wellbore by pumping, so as to isolate the oil, gas, and water layers to protect the production layer and The purpose of supporting the protective casing. The cement should have good pumpability until it is delivered to the desired location. As the hydration reaction in cement proceeds, when the cohesion reaches a certain level, the cement will lose its fluidity and cannot be used for construction. Therefore, the thickening time of cement slurry is a key paramet...

Claims

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Application Information

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IPC IPC(8): C08F220/28C08F222/02C08F220/58C08F222/14C08F222/20C09K8/467
Inventor 戚先尧袁尚贤
Owner 兰德(廊坊)石化环保设备有限公司
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