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Dispersing agent for removing oil from shale gas oil-based drilling cuttings

An oil-based drill cuttings and dispersant technology, which is applied in the field of dispersants for shale gas oil-based drill cuttings for oil removal, can solve problems such as long time consumption, and achieve the effects of simple equipment, low energy consumption, and simple processing methods.

Inactive Publication Date: 2020-09-01
重庆长能环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method takes a long time, and requires strict control of conditions such as pH, humidity, and temperature during processing, and has high technical requirements for operators.

Method used

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  • Dispersing agent for removing oil from shale gas oil-based drilling cuttings
  • Dispersing agent for removing oil from shale gas oil-based drilling cuttings
  • Dispersing agent for removing oil from shale gas oil-based drilling cuttings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A dispersant for shale gas oil-based drilling cuttings degreasing and a degreasing method thereof, specifically:

[0044] a. Degreasing and dispersing agent for shale gas oil-based drilling cuttings: 20 parts of inorganic alkali sodium hydroxide, 1 part of organic base triethylenediamine, 2 parts of surfactant, 0.3 parts of defoamer tributyl phosphate, hexametaphosphoric acid 10 parts of sodium; the surfactant is a mixture of cationic surfactant and nonionic surfactant, 1 part of octadecyltrimethylammonium chloride and 1 part of Tween; water is added to prepare the dispersant to a mass fraction of 10% solvent;

[0045] b. Weigh 400g of oil-based cuttings in beaker 1, then add 600g of oil-removing and dispersing agent, stir at room temperature, the stirring speed is 150rpm-450rpm, and the stirring time is 50min. In beaker 2, place the remaining solid phase in 50-90°C hot water, the volume ratio of hot water to solid phase is 1.5:1, continue stirring for 40-90 minutes, p...

Embodiment 2

[0048] A dispersant for shale gas oil-based drilling cuttings degreasing and a degreasing method thereof, specifically:

[0049] a. Degreasing and dispersing agent for shale gas oil-based drilling cuttings: 40 parts of inorganic alkali sodium carbonate, 0.5 part of organic base triethylamine, 2 parts of surfactant, 0.5 part of defoamer tributyl phosphate, 20 parts of sodium hexametaphosphate Surfactant is a mixture of cationic surfactant and nonionic surfactant, 1 part of octadecyltrimethylammonium chloride and 1 part of Span; water is added and the dispersant is mixed with a mass fraction of 5% solvent;

[0050] b. Weigh 500g of oil-based cuttings in beaker 1, then add 1000g of oil-removing and dispersing agent, stir at room temperature, the stirring speed is 150rpm-450rpm, and the stirring time is 50min. In beaker 2, place the remaining solid phase in 50-90°C hot water, the volume ratio of hot water to solid phase is 2:1, continue to stir for 40-90 minutes, pour the oil-wate...

Embodiment 3

[0053] A dispersant for shale gas oil-based drilling cuttings degreasing and a degreasing method thereof, specifically:

[0054] a. Degreasing and dispersing agent for shale gas oil-based drilling cuttings: 30 parts of inorganic alkali sodium hydroxide, 1.5 parts of organic base triethylenediamine, 1.5 parts of surfactant, 0.3 parts of defoaming agent tributyl phosphate, hexametaphosphoric acid 20 parts of sodium; the surfactant is a mixture of cationic surfactant and nonionic surfactant, 0.75 part of cetyltrimethylammonium bromide and 0.75 part of spar; water is added to prepare the dispersant to a mass fraction of 15% solvent;

[0055] b. Weigh 400g of oil-based drilling cuttings in beaker 1, add 600g of oil-removing and dispersing agent, stir at a temperature of 50°C, the stirring speed is 150rpm-450rpm, and the stirring time is 50min, and let it stand for stratification; Pour it out and put it in beaker 2, put the rest of the solid phase in hot water at 50-90°C, the volum...

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Abstract

The invention relates to a dispersing agent for removing oil from shale gas oil-based drilling cuttings. The dispersing agent is prepared from the following raw materials in parts by mass: 10-40 partsof inorganic alkali, 0.01-2 parts of organic alkali, 0.01-2 parts of a surfactant, 0.01-0.5 parts of a defoaming agent and 5-30 parts of sodium hexametaphosphate. Oil-based drilling cuttings and thedispersing agent are mixed at room temperature, oil and rock debris solid phases are well separated, layered separation and respective recovery are performed, an oil-water phase is further subjected to acid-adding homogenization and emulsification treatment, and finally, the oil phase can be recovered through oil-water separation. The dispersing agent is easily available in components and non-toxic, can be industrially applied to oil phase treatment of shale gas oil-based drilling cuttings, and turns waste into wealth.

Description

technical field [0001] The invention belongs to the technical field of oil-based cuttings treatment in shale gas drilling, relates to the technical field of environmental protection, in particular to a dispersant for oil-removing shale gas oil-based cuttings, and also relates to its specific application. Background technique [0002] Oil-based drilling cuttings are oil-based drilling fluids used in the drilling process of oil and gas fields. During the drilling process, the drilling cuttings are taken out of the oil well with the drilling fluid and mixed evenly with the oil-based drilling fluid. The drilling fluid adheres to the surface of the cuttings. A black sticky oil-based drill cuttings, which are environmentally hazardous, were formed. It is a complex multiphase system containing mineral oil, alkanes and their derivatives and various heavy metals. If it is piled up for a long time, with the infiltration of rainfall or snowfall, harmful substances in oil-based drilling...

Claims

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Application Information

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IPC IPC(8): B01F17/18B01F17/42B01F17/14E21B21/06B09B3/00C10G1/00C09K8/32C09K23/18C09K23/14C09K23/42
CPCE21B21/068E21B21/066B09B3/00C10G1/00C09K8/32C10G2300/1007C09K23/14C09K23/00C09K23/017
Inventor 符剑刚蓝强欧阳征国王晓波赵迪朱仁锋李春林
Owner 重庆长能环境科技有限公司
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