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A treatment agent for water-based drilling fluid cuttings and its preparation method

A technology of water-based drilling fluid and treatment agent, applied in chemical instruments and methods, agriculture, organic fertilizers, etc., can solve the problem that curing agents are difficult to achieve good treatment effects, the strength of cured products does not meet the requirements, and the requirements of first-class standards are not met. and other problems, to achieve good curing effect, good curing effect and strong application effect

Active Publication Date: 2020-09-04
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in order to meet the inhibition, plugging, lubricity and reservoir protection functions of high-performance water-based drilling fluids in complex geological environments, the drilling fluid system is relatively complex, containing amine-based or aluminum-based inhibitors and filter reducers. Compared with the cuttings produced by ordinary water-based drilling fluids, the treatment of cuttings is still more difficult. It is difficult to achieve a good treatment effect with conventional curing agents, and the strength of the cured products does not meet the requirements. Requirements, there is no resource value as building materials, paving substrates and other materials, and the pH, COD, petroleum and other indicators in the leachate often do not meet the requirements of the first-level standard of GB8978-1996

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] This embodiment provides a treatment agent for drilling fluid cuttings, which is prepared according to the following steps:

[0039] (1) In a 500mL three-neck flask (insert a condenser respectively, pass N 2 , stirring paddle), add 200mL tap water, put the flask into the electric heating mantle, turn on the stirrer, stir at a speed of 200rpm, and feed N 2 ;

[0040] (2) While stirring, 24 g of polyethylene glycol with a viscosity-average molecular weight of 300 and 14 g of isophorone diisocyanate were added successively, and reacted for 4 hours at 65° C. to obtain a prepolymer;

[0041] (3) Continue to stir, the stirring speed is 400rpm, add 36g of 2,2-bis(hydroxymethyl) propionic acid in the prepolymer, pass into N 2 , reacted at 65°C for 6h to obtain a colorless transparent viscous liquid;

[0042] (4) Naturally cool the flask with colorless transparent viscous liquid to room temperature, put it into the refrigerator, and after further cooling to 0°C, add 6.5g of d...

Embodiment 2

[0046]This embodiment provides a treatment agent for drilling fluid cuttings, which is prepared according to the following steps:

[0047] (1) In a 500mL three-neck flask (insert a condenser respectively, pass N 2 , stirring paddle), add 250mL tap water, put the flask into the electric heating mantle, turn on the stirrer, stir at a speed of 200rpm, and feed N 2 ;

[0048] (2) Add 15g of polypropylene glycol with a viscosity-average molecular weight of 400, 15g of polyethylene glycol with a viscosity-average molecular weight of 400, and 16g of polyisocyanate with a viscosity-average molecular weight of 12000 while stirring, and react for 5.5 hours at 75°C to obtain a prepolymer ;

[0049] (3) Continue to stir, stirring speed 500rpm, add (R)-3-bromo-2-hydroxyl-2-methylpropionic acid of 45g in prepolymer, pass into N 2 , reacted at 75°C for 8 hours to obtain a colorless transparent viscous liquid;

[0050] (4) the flask that colorless transparent viscous liquid is housed is n...

Embodiment 3

[0054] This embodiment provides a treatment agent for drilling fluid cuttings, which is prepared according to the following steps:

[0055] (1) In a 500mL three-neck flask (insert a condenser respectively, pass N 2 , stirring paddle), add 200mL tap water, put the flask into the electric heating mantle, turn on the stirrer, stir at a speed of 300rpm, and feed N 2 ;

[0056] (2) While stirring, 28 g of polyvinyl alcohol with a viscosity-average molecular weight of 16,000, 10 g of hexamethylene diisocyanate and 8 g of polyisocyanate with a viscosity-average molecular weight of 12,000 were successively added, the reaction temperature was 70° C., and the reaction time was 6 hours to obtain a prepolymer;

[0057] (3) Continue to stir, stirring speed 400rpm, add the α-methyllevulinic acid of 40g in prepolymer, pass into N 2 , reacted at 80°C for 5 hours to obtain a colorless transparent viscous liquid;

[0058] (4) Cool the flask containing the colorless transparent viscous liquid...

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Abstract

The invention provides a treatment agent for water-based drilling fluid drilling cuttings. The treatment agent is composed of 70-85wt% of intermediate product, 10-20wt% of clay powder and 5-10wt% of gypsum powder, the intermediate product is composed of 200-300ml of water, 21-37g of alcohol-type monomer, 12-18g of cyanate-type monomer, 32-45g of propionic acid type monomer, 6-9g of dopamine, 1.5-3.0g of dicyclohexyl carbodiimide and 0.5-1.0g of organic amine. The invention further provides a preparation method of the treatment agent. The treatment agent is low in adding amount, good in solidifying effect and high in suitability.

Description

technical field [0001] The invention relates to a treatment agent and a preparation method thereof, in particular to a water-based drilling fluid cuttings treatment agent and a preparation method thereof, and belongs to the technical field of oil and gas field drilling environment protection. Background technique [0002] As the development of various oilfields in my country gradually enters the middle and later stages, the difficulty of drilling operations is gradually increasing. In order to solve problems such as tripping resistance, pipe sticking, wellbore instability, lost circulation and formation damage, the traditional solution is to drill in complex well sections. Use oil-based drilling fluid. However, due to the serious pollution of oil-based drilling fluids produced by oil-based drilling fluids, the environmental protection department has increasingly strict control over the toxicity of drilling fluids and cuttings; and the continuous phase of oil-based drilling fl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/40C08G18/66C08G18/48C08G18/62C08G18/65C09K103/00
CPCC08G18/4808C08G18/4833C08G18/6212C08G18/6535C08G18/6541C08G18/6688C08G18/6692C09K17/40C09K2103/00
Inventor 谢水祥许毓孙静文李兴春任雯仝坤张明栋刘晓辉李树森
Owner BC P INC CHINA NAT PETROLEUM CORP
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