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Preparation method of flow pattern regulator for synthetic base drilling fluid and flow pattern regulator

A flow pattern regulator, drilling fluid technology, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as difficulty in drilling fluid flow, and achieve the effect of meeting development needs, ensuring safety, and good applicability

Active Publication Date: 2019-03-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problem of difficult drilling fluid flow in deep water and low temperature environment in the prior art, the present invention provides a preparation method of flow pattern regulator for synthetic base drilling fluid and the flow pattern regulator

Method used

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  • Preparation method of flow pattern regulator for synthetic base drilling fluid and flow pattern regulator
  • Preparation method of flow pattern regulator for synthetic base drilling fluid and flow pattern regulator
  • Preparation method of flow pattern regulator for synthetic base drilling fluid and flow pattern regulator

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Experimental program
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Effect test

Embodiment 1

[0040] Under the protection of nitrogen, according to the molar ratio of carboxyl group and amine group of 1:1, add 80 grams of unsaturated dimer fatty acid to the flask, heat to 100 ° C for 15 minutes, weigh 10 grams of diethylenetriamine, and move to constant pressure In the dropping funnel, add amine at 100°C, and the dropping time is controlled at 30 minutes. After the dropping is completed, the temperature is slowly raised to 140°C, stirred at 300rpm for 2 hours, and reacted until the acid value ≤ 5.0 (mg KOH / g); then the intermediate product A was cooled to 100°C, according to the mass ratio of the intermediate product A to the alkoxylated derivative 70:30, then 36.4 grams of polyoxyethylene cocoamine was added, stirred for about 2 hours, and the finished product B was obtained.

Embodiment 2

[0042] Under the protection of nitrogen, according to the molar ratio of carboxyl group and amine group of 1:4, add 74 grams of unsaturated dimer fatty acid into the flask, heat to 100 ° C for 15 minutes, weigh 40 grams of tetraethylenepentamine, move to constant pressure drop In the liquid funnel, the amine addition operation was carried out at 100°C, and the dropping time was controlled at 30min. After the dropping was completed, the temperature was slowly raised to 150°C, and kept stirring at 300rpm for 4 hours, until the acid value ≤ 5.0 (mg KOH / g); then intermediate product A was cooled to 120°C, according to the mass ratio of intermediate product A to alkoxylated derivatives 50:50, then 110 g of polyoxyethylene octadecylamine was added, stirred for about 4 hours, and finished product C was obtained.

Embodiment 3

[0044] Add the flow regulator prepared by the present invention in the synthetic base drilling fluid system and evaluate the rheological change of the sample under different temperature conditions without adding:

[0045] Synthetic-based drilling fluid formula 1: Add 8g of primary emulsifier SMEMUL-1, 6g of secondary emulsifier SMEMUL-2, 80mL of 25% calcium chloride aqueous solution, 8g of organic soil, 8g of fluid loss reducer, each treatment agent needs to be stirred at high speed for 10 minutes, and finally 700 barite is added, stirred at high speed for 20 minutes, and the density is 2.0g / cm 3 traditional synthetic-based drilling fluid system. At the same time, 3 groups of the same formula were prepared, and 6 g of flow regulators B and C were added to the other two groups of systems. Among them, the main emulsifier SMEMUL-1 and the auxiliary emulsifier SMEMUL-2 are self-developed products.

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Abstract

The invention discloses a preparation method of a flow pattern regulator for synthetic base drilling fluid. The method comprises the following steps: 1) reacting polyunsaturated fatty acids with polyamines under the protection of nitrogen until the acid value is less than or equal to 5.0 mg KOH / g to prepare an intermediate product A, wherein the molar ratio of carboxyl groups in polyunsaturated fatty acids to amino groups in polyamines is 1:(1-4); and 2) adding alkoxylated derivatives in the intermediate product A to be subjected to a reaction to prepare the flow pattern regulator, wherein themass ratio of the intermediate product A to the alkoxylated derivatives is 30:70 to 80:20. The flow pattern regulator of the invention is added to a synthetic base drilling fluid system, so that theshear force and low shear viscosity of the drilling fluid system are not affected by low temperature, and a series of complex downhole situations such as poor fluidity of drilling fluid, excessive equivalent circulation density and difficult pressure control in the deep water low temperature environment are solved, so as to ensure the safety of deep water drilling and better meet the needs of deepwater drilling.

Description

technical field [0001] The invention relates to the technical field of deep-water drilling, and more particularly relates to a preparation method of a flow pattern regulator for synthetic-based drilling fluid and the flow pattern regulator. Background technique [0002] The Chinese patent whose publication number is CN103351447B relates to a rheological stabilizer for synthetic-based drilling fluid and its preparation method: under an inert atmosphere, vinylic monomers are obtained through copolymerization under the conditions in which an organic solvent and an initiator exist. Rheology stabilizer; the ethylenic monomer is at least one of carboxyl-containing unsaturated fatty acid, long carbon chain acrylamide and styrene compounds. The rheological stabilizer of the invention is suitable for preparing deep-water synthetic base drilling fluid; after adding the stabilizer, the shear force of the drilling fluid system is not greatly affected by temperature changes. [0003] Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035C08G69/28C08G69/34C08G69/26C08G81/00
CPCC08G69/26C08G69/28C08G69/34C08G81/00C09K8/035
Inventor 韩子轩林永学高书阳甄剑武王显光韩秀贞李舟军柴龙陈晓飞唐文泉
Owner CHINA PETROLEUM & CHEM CORP
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