A kind of oil well cement liquid retarder and preparation method thereof

An oil well cement and retarder technology, which is applied in chemical instruments and methods, compounds of Group 5/15 elements of the periodic table, organic chemistry, etc., can solve problems such as heterogeneity, and achieve stable chemical properties and thickening. The effect of short transition times and easy thickening times

Active Publication Date: 2018-10-26
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One of its disadvantages is the heterogeneity, depending on whether the source is hardwood or softwood, and may even be observed at different times when the trees were felled

Method used

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  • A kind of oil well cement liquid retarder and preparation method thereof
  • A kind of oil well cement liquid retarder and preparation method thereof
  • A kind of oil well cement liquid retarder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The synthetic process of the embodiment of the present invention 1 phosphonic acid carboxylate is as follows:

[0052] In a 500mL there-necked flask with an electric stirrer, a thermometer and a condenser, add 100g of ethyl phosphite, 50g of methyl acrylate and 50g of dimethyl oxalate, etc., add 6g of methanol as a catalyst, ventilate nitrogen and heat after the reaction ( temperature is 100°C), use a dropping funnel to slowly add 10 g of hydrochloric acid dropwise into a three-necked flask, continue to react for 3 hours, then add sodium hydroxide to neutralize the solution so that the pH value of the solution is 7, and finally obtain a phosphonic acid carboxylic acid Salt.

[0053] Take by weighing the phosphonic acid group carboxylate that the above-mentioned embodiment 1 of 1 weight part obtains, the sodium citrate of 0.20 weight part, the potassium sodium tartrate of 0.05 weight part and the gluconolactone of 0.15 weight part, then mix homogeneously in beaker , mad...

Embodiment 2

[0057] The synthetic process of the embodiment of the present invention 2 phosphonocarboxylates is as follows:

[0058] In a 500mL three-neck flask equipped with an electric stirrer, a thermometer and a condenser, add 150g of ethyl methyl phosphate, 75g of butyl methacrylate and 75g of ethyl oxalate, etc., add 9g of methanol as a catalyst, blow nitrogen and heat the reaction Finally (the temperature is 120°C), slowly drop 25g of hydrochloric acid into the three-necked flask with a dropping funnel, continue the reaction for 3h, and then add sodium hydroxide to neutralize the solution so that the pH of the solution is 6, and finally obtain the phosphonic acid group Carboxylate.

[0059] Take by weighing the phosphonic acid group carboxylate that the above-mentioned embodiment 2 of 1 weight part obtains, the sodium citrate of 0.10 part, the potassium sodium tartrate of 0.05 part and the gluconolactone of 0.05 part, then mix homogeneously in beaker, make Medium and high temperatu...

Embodiment 3

[0063] The synthetic process of the embodiment of the present invention 1 phosphonic acid carboxylate is as follows:

[0064] In a 500mL there-necked flask with an electric stirrer, a thermometer and a condenser, add 200g of ethyl phosphite, 100g of methyl acrylate and 100g of dimethyl oxalate, etc., add 20g of methanol as a catalyst, nitrogen and heat the reaction ( temperature is 110°C), use a dropping funnel to slowly add 50 g of dilute sulfuric acid dropwise into a three-necked flask, continue the reaction for 4 hours, then add sodium hydroxide to neutralize the solution to make the pH of the solution 7, and finally obtain the phosphonic acid carboxyl salt.

[0065] The phosphonic acid group carboxylate that the above-mentioned embodiment 3 of taking 1 part of weight obtains, the sodium citrate of 0.15 part, the potassium sodium tartrate of 0.05 part and the gluconolactone of 0.10 part, then mix homogeneously in beaker, make Medium and high temperature liquid retarder, co...

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Abstract

The invention provides an oil well cement liquid set retarder and a preparation method thereof. The set retarder comprises, by weight, 1 part of phosphonocarboxylate, 0.15-0.40 parts of hydroxycarboxylate and 0.05-0.20 parts of gluconolactone. The set retarder has the advantages of good set retarding effect, stable chemical performances, easiness in adjustment of the thickening time, and good regularity and operability. The set retarder has a wide application temperature range (90-160 DEG C), is a high-medium temperature set retarder, and can meet dialing needs of growing drilling completion engineering without a set retarding reinforcing agent.

Description

technical field [0001] The invention belongs to the technical field of retarder preparation, in particular to a liquid retarder for oil well cement and a preparation method thereof. Background technique [0002] In oil and gas well cementing operations and other underground cementing operations, it is usually required to inject cement slurry containing cement, water and admixtures into the predetermined formation underground through surface pumping equipment to seal the annulus between the formation and the casing . Typically cement slurry is pumped into the casing and returns to the annulus through the gap between the casing and the formation. The cement slurry solidifies in the annulus to form a hard cement sheath, which can form a bond with the formation and the casing. In order to achieve a satisfactory cementing operation, it is necessary to achieve a high-strength bond to prevent fluid channeling along or within the cement sheath, which would contaminate the formatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/10C04B24/00C07F9/38C04B103/22
CPCC04B24/003C04B40/0039C04B2103/22C07F9/3808C04B24/06C04B24/10
Inventor 冯望生宋伟宾尚光远李洋谢承斌李立荣
Owner BC P INC CHINA NAT PETROLEUM CORP
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