Drilling fluid lubricating agent composition containing lubricating capsules, preparation method of drilling fluid lubricating agent composition, water-based drilling fluid and application thereof

A technology of lubricant composition and water-based drilling fluid, which is applied in the field of drilling fluid, can solve problems such as difficulty in achieving lubricating effect, low effective concentration, and poor persistence, and achieve improved oxidation stability and lubricating performance, excellent lubricating performance, The effect of rich sources of raw materials

Inactive Publication Date: 2019-01-04
SINOPEC SSC +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problem that the drilling fluid lubricant existing in the prior art is evenly dispersed in the drilling fluid after being added to the drilling fluid, and has a uniform lubrication effect on all parts of the downhole, and cannot "target" key parts such as high friction and torque. It is difficult to achieve a "targeted" lubrication effect, and there are problems such as "low effective concentration, poor persistence, large consumption, and influence on rheology", and a lubricant combination for drilling fluid containing lubricating capsules is provided. Material and its preparation method and water-based drilling fluid and its application

Method used

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  • Drilling fluid lubricating agent composition containing lubricating capsules, preparation method of drilling fluid lubricating agent composition, water-based drilling fluid and application thereof
  • Drilling fluid lubricating agent composition containing lubricating capsules, preparation method of drilling fluid lubricating agent composition, water-based drilling fluid and application thereof
  • Drilling fluid lubricating agent composition containing lubricating capsules, preparation method of drilling fluid lubricating agent composition, water-based drilling fluid and application thereof

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preparation example Construction

[0032] According to the present invention, the preparation method of the capsule particles includes the following steps:

[0033] (a) Under the protection of nitrogen, the starch and distilled water are gelatinized, and then sulfonated polyimide, dimethyl diallyl ammonium chloride and cerium ammonium nitrate are sequentially added for polymerization;

[0034] (b) The lubricating substance and the capsule membrane prepolymer obtained in step (a) are reacted at a constant temperature.

[0035] In step (a), under the protection of nitrogen, add starch and distilled water into a four-necked flask, gelatinize at 80-95°C for 20-30 minutes while stirring uniformly, control the reaction temperature to 30-40°C, and then add sulfur Polyimide, dimethyl diallyl ammonium chloride and cerium ammonium nitrate are stirred and reacted for 1-2 hours to obtain a capsule prepolymer with a total concentration of 3-7 wt%;

[0036] Preferably, the stirring is carried out under the condition that the stirrin...

Embodiment 1

[0093] This example is used to illustrate the preparation of lubricant compositions and water-based drilling fluids by the method of the present invention.

[0094] The drilling fluid lubricant composition of this embodiment includes the following components and parts by weight: 96 parts by weight of capsule particles, 2 parts by weight of extreme pressure antiwear agent, 4 parts by weight of dispersant, and 3 parts by weight of defoamer.

[0095] Wherein, the capsule includes a capsule membrane and a lubricating substance placed in the capsule membrane. The lubricating substance includes the following components and parts by weight: 32 parts by weight of modified vegetable oil, 48 parts by weight of biodiesel, 5 parts by weight of surfactant, and polyol The nonionic emulsifier is 3 parts by weight; the surfactant is polyoxyethylene laureth ether, and the polyol nonionic emulsifier is sorbitan diester.

[0096] In this embodiment, the modified vegetable oil is epoxy-modified rapeseed...

Embodiment 2

[0118] This example is used to illustrate the preparation of lubricant compositions and water-based drilling fluids by the method of the present invention.

[0119] The drilling fluid lubricant composition of the present embodiment is prepared with the following components and parts by weight of raw materials: 96 parts by weight of capsule particles, 2 parts by weight of extreme pressure antiwear agent, 4 parts by weight of dispersant, and 3 parts by weight of defoamer.

[0120] Wherein, the capsule includes a capsule membrane and a lubricating substance placed in the capsule membrane. The lubricating substance includes the following components and parts by weight: 40 parts by weight of modified vegetable oil, 50 parts by weight of biodiesel, 6 parts by weight of surfactant, and polyol 4 parts by weight of nonionic emulsifier. The surfactant is lauryl alcohol polyvinyl ether, and the polyol nonionic emulsifier is sorbitan monopalmitate.

[0121] In this embodiment, the modified vege...

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Abstract

The invention belongs to the technical field of drilling fluid in petroleum and natural gas industry and relates to a drilling fluid lubricating agent composition containing lubricating capsules, a preparation method of the drilling fluid lubricating agent composition, water-based drilling fluid and application thereof. The lubricating agent composition comprises the capsules, a dispersing agent,an anti-wear reagent at extreme pressure and a defoaming agent and is characterized in that each capsule comprises a capsule shell and a lubricating substance arranged in the capsule shell, the capsule shell is prepared by sulfonated polyimide, dimethyl diallyl ammonium chloride and ceric ammonium nitrate through polymerization reaction, and the lubricating substance is one or more of modified vegetable oil, biodiesel, surfactant and polyol non-ionic emulsifier. The lubricating agent composition has the advantages that the composition can achieve targeting release under pressure control, a drilling fluid lubricating agent can perform 'targeting positioning and lubricating according to needs' on underground high-friction-drag and high-torque parts, the efficient friction and resistance reducing effect of the lubricating agent is brought into full play, and the drilling fluid lubricating agent composition is good in friction resistance, good in turbidity point stability, easy in biodegradation, green, environmentally friendly and promising in application prospect.

Description

Technical field [0001] The invention belongs to the technical field of drilling fluids in the petroleum and natural gas industry, and relates to a lubricant composition for drilling fluids containing lubricating capsule particles, a preparation method thereof, and water-based drilling fluids and applications thereof. Background technique [0002] As the oil and gas drilling and development range has gradually moved towards deep and ultra-deep, deep ocean, unconventional oil and gas reservoirs with complex geological conditions, in order to improve oil and gas recovery and reduce development costs, drilling technologies for extended reach and long horizontal wells have been widely used However, the friction and torque generated by the friction between the downhole drilling tool, the formation and the drilling fluid cause sticking, tripping resistance, drilling tool wear and other complex downhole conditions that have become increasingly prominent. Especially in the process of dril...

Claims

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Application Information

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IPC IPC(8): C09K8/035C09K8/24
CPCC09K8/035C09K8/24C09K2208/34
Inventor 陈二丁刘均一宿振国李蕾柴金鹏郭保雨王宝田蒋莉王旭东赵红香
Owner SINOPEC SSC
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