Treatment agent for water-based drilling fluid drilling cuttings and preparation method thereof

A water-based drilling fluid and treatment agent technology, which is applied in chemical instruments and methods, organic fertilizers, fertilizer mixtures, 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 level of standards cannot be reached Requirements and other issues, to achieve good curing effect, good curing effect, strong application effect

Active Publication Date: 2018-09-14
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] The present embodiment provides a treatment agent for drilling fluid cuttings, which is prepared according to the following steps:

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

[0040] (2) adding 24 g of polyethylene glycol with a viscosity average molecular weight of 300 and 14 g of isophorone diisocyanate successively while stirring, and reacting at 65° C. for 4 h to obtain a prepolymer;

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

[0042] (4) The flask containing the colorless transparent viscous liquid is naturally cooled to room temperature, placed in a refrigerator, and further cooled to 0° C., add 6.5g of dopami...

Embodiment 2

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

[0047] (1) In a 500mL three-necked flask (insert a condenser tube, pass N 2 , stirring paddle), add 250mL of 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) 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 12,000 were added successively while stirring, and reacted at 75°C for 5.5 hours to obtain a prepolymer ;

[0049] (3) continue to stir, stirring speed 500rpm, add the (R)-3-bromo-2-hydroxy-2-methylpropionic acid of 45g in the prepolymer, feed N 2 , and reacted at 75°C for 8h to obtain a colorless transparent viscous liquid;

[0050] (4) The flask containing the colorless tra...

Embodiment 3

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

[0055] (1) In a 500mL three-necked flask (insert a condenser tube, pass N 2 , stirring paddle), add 200mL of 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, successively add 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, the reaction temperature is 70 ° C, and the reaction time is 6 h to obtain a prepolymer;

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

[0058] (4) The flask containing the colorless transparent viscous liquid was naturally c...

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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 treatment agent for water-based drilling fluid drill cuttings and a preparation method thereof, belonging to the technical field of oil and gas field drilling environmental protection. Background technique [0002] With the development of oilfields in my country gradually entering the middle and late stages, the difficulty of drilling operations has gradually increased. In order to solve problems such as tripping and tripping, sticking, wellbore instability, lost circulation and formation damage, the traditional solution is to use complex well sections. Use oil-based drilling fluid. However, due to the heavy pollution of oil-based drilling cuttings produced by oil-based drilling fluids, the environmental protection department is increasingly controlling the toxicity of drilling fluids and cuttings; and the continuous phase of oil-based drilling fluids is dies...

Claims

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Application Information

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Patent Type & Authority Applications(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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