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Plugging extreme-pressure lubricant as well as preparation method and application of plugging extreme-pressure lubricant

A technology of extreme pressure lubricant and extreme pressure antiwear agent, which is applied in the field of plugging extreme pressure lubricant for drilling fluid and its preparation, can solve the problems of poor lubrication durability, poor extreme pressure and antiwear, and high fluorescence level. Achieve good extreme pressure lubricity, improve mud cake quality, and good compatibility

Active Publication Date: 2018-07-06
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] In order to solve the technical problems of easy foaming, poor extreme pressure and anti-wear, poor lubrication durability, and high fluorescence level existing in lubricants used on drilling sites, the purpose of the present invention is to provide a plugging type extreme pressure lubricant and its preparation Method and application, the lubricant is environmentally friendly, has good extreme pressure lubricity and good compatibility, can significantly improve the quality of mud cake in drilling fluid, and has a good plugging effect

Method used

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  • Plugging extreme-pressure lubricant as well as preparation method and application of plugging extreme-pressure lubricant
  • Plugging extreme-pressure lubricant as well as preparation method and application of plugging extreme-pressure lubricant
  • Plugging extreme-pressure lubricant as well as preparation method and application of plugging extreme-pressure lubricant

Examples

Experimental program
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Effect test

Embodiment 1

[0033] This implementation provides a plugging type extreme pressure lubricant, the plugging type extreme pressure lubricant includes 85wt% modified cottonseed oil, 6wt% Span 80, 6wt% OP- 10 and 3 wt% T405.

[0034] The modified vegetable oil of this embodiment reacts cottonseed oil with methanol solution of 0.5 mol / L sodium hydroxide at 70°C to 90°C, and the esterified cottonseed oil obtained by extraction is the modified cottonseed oil of this embodiment.

[0035] This embodiment also provides the preparation method of the above-mentioned plugging type extreme pressure lubricant, which is to add Span 80, OP-10 and T405 to the modified cottonseed oil in sequence, and fully stir and mix evenly to obtain the plugging type extreme pressure lubricant of this embodiment. Press lubricant, named it MPA-1.

[0036] The plugging type extreme pressure lubricant MPA-1 provided in this example and several domestic and foreign lubricants were used to test the extreme pressure lubrication...

Embodiment 2

[0047] This implementation provides a plugging type extreme pressure lubricant, the plugging type extreme pressure lubricant includes 75wt% modified cottonseed oil, 5wt% Span 80, 6wt% OP- 10. 5 wt% T405 and 10 wt% tall oil fatty acid.

[0048] The modified vegetable oil of this embodiment reacts cottonseed oil with methanol solution of 0.5 mol / L sodium hydroxide at 70°C to 90°C, and the esterified cottonseed oil obtained by extraction is the modified cottonseed oil of this embodiment.

[0049]This embodiment also provides the preparation method of the above-mentioned plugging type extreme pressure lubricant, which is to add Span 80, OP-10, T405 and tall oil fatty acid into the modified cottonseed oil in sequence, and fully stir and mix evenly to obtain the present embodiment The blocking type extreme pressure lubricant is named MPA-2.

[0050] The drilling fluid performance of the following drilling fluid systems before and after adding the plugging type extreme pressure lubr...

Embodiment 3

[0057] This implementation provides a plugging type extreme pressure lubricant, the plugging type extreme pressure lubricant includes 80wt% of modified cottonseed oil, 5wt% of Span 80, 4wt% of OP- 10. 3 wt% T405 and 8 wt% tall oil fatty acid.

[0058] The modified vegetable oil of this embodiment reacts cottonseed oil with methanol solution of sodium hydroxide at 70° C. to 90° C., and the esterified cottonseed oil obtained by extraction is the modified cottonseed oil of this embodiment.

[0059] This embodiment also provides the preparation method of the above plugging type extreme pressure lubricant, which is to add Span 80, OP-10, sulfur type extreme pressure antiwear agent and tall oil fatty acid into the modified cottonseed oil in sequence, and stir thoroughly Mix evenly to obtain the plugged extreme pressure lubricant of this embodiment, which is named MPA-3.

[0060] The drilling fluid performance of the following drilling fluid systems before and after adding the plugg...

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Abstract

The invention provides a plugging extreme-pressure lubricant as well as a preparation method and application of the plugging extreme-pressure lubricant. The plugging extreme-pressure lubricant comprises 70wt%-85wt% of modified vegetable oil, 2wt%-5wt% of extreme-pressure anti-wear agent and 8wt%-15wt% of surfactant. According to the plugging extreme-pressure lubricant provided by the invention, the modified vegetable oil which is easily biodegraded is adopted, and a sulfur-type additive with good extreme-pressure and anti-wear properties is added, so that the lubricant is environment-friendly,good in extreme-pressure lubricating property and compatibility, capable of obviously improving the quality of a mud cake in a drilling fluid and good in plugging effect and can be favorably appliedto a well drilling site and can be applied to wear and resistance reduction during well drilling operation of a large-displacement horizontal well, a directional well, a long open hole deep well, a complex structural well and the like.

Description

technical field [0001] The invention belongs to the technical field of environment-friendly water-based drilling fluid in drilling engineering, and relates to a plugging type extreme-pressure lubricant for drilling fluid and a preparation method and application thereof. Background technique [0002] With the development of oil and gas exploration, extended-reach horizontal wells, directional wells, long open-hole deep wells, and wells with complex structures are gradually increasing in drilling engineering. The contact area between the drill string and the well wall increases significantly during operation, and the friction increases. The extreme pressure anti-wear lubrication performance of water-based drilling fluid puts forward higher requirements. [0003] At present, conventional lubricants used in drilling sites generally have problems such as easy foaming, poor extreme pressure and anti-wear, poor lubrication durability, and high fluorescence level, and most of them u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035
CPCC09K8/035C09K2208/34
Inventor 屈沅治戎克生李亚林罗淮东赵利黄宏军汪波刘涛光叶成冯小华李彦琴张玮
Owner BC P INC CHINA NAT PETROLEUM CORP
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