Drilling fluid extreme pressure lubricant having freezing point of lower than -25 DEG C

A technology of extreme pressure lubricant and drilling fluid, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of inconvenient construction and large dosage, and achieve the effect of good compatibility and excellent lubricating effect

Active Publication Date: 2017-05-03
新疆宏隆石油化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, compound lubricants based on animal and vegetable oils and mineral oils are used in the largest amount due to their good use effect. Because there is no warehouse at the drilling construction si

Method used

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  • Drilling fluid extreme pressure lubricant having freezing point of lower than -25 DEG C

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Preparation of thermally polysulfurized cottonseed oil: Add 500 kg of non-aqueous cottonseed oil into the reaction kettle, heat to 280°C, pass nitrogen gas at the bottom for 24 hours, keep the temperature between 260-300°C during the process, and after the thermal polymerization, Cool down to 180-200°C, slowly add sulfur powder, control the temperature not to exceed 200°C, and continue to react for 1.5h after adding. The mass ratio of the cottonseed oil to sulfur powder is 1:0.08-0.12.

[0039] The thermally polysulfurized cottonseed oil used in the following examples can be prepared by the method of the present application, or by other methods in the art.

Embodiment 2

[0041] A drilling fluid extreme pressure lubricant with a freezing point lower than -25°C. See Table 3 for each component and its content.

[0042] Its preparation method is:

[0043] Heat light lubricating oil, extreme pressure anti-wear agent, surfactant, and defoamer in the reaction kettle in proportion to 40-60°C while stirring, keep at this temperature for 1-2 hours, cool to about 30°C and pack bucket.

Embodiment 3

[0045] A drilling fluid extreme pressure lubricant with a freezing point lower than -25°C. See Table 3 for each component and its content.

[0046] Its preparation method is with embodiment 2.

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Abstract

The present invention discloses a drilling fluid extreme pressure lubricant having a freezing point of lower than -25 DEG C, wherein the drilling fluid extreme pressure lubricant comprises, by weight, 80-95 parts of lightweight lubricating oil, 5-15 parts of an extreme pressure anti-wear agent, 0.5-2 parts of a surfactant, and 0.5-5 parts of an anti-foaming agent. According to the present invention, the drilling fluid extreme pressure lubricant is suitable for the petroleum drilling operation in high-cold regions, and has the freezing point of less than -25 DEG C; after 0.5-1% of the drilling fluid extreme pressure lubricant is added to a drilling fluid, the lubricating coefficient reduction rate is greater than 70%, the extreme pressure film strength is more than or equal to 150 MPa, no bubble is generated in the drilling fluid, other performances of the drilling fluid are not affected, no fluorescence exists, the geological mud logging is not affected, the compatibility is good, and the drilling fluid has the excellent lubricating effect at the temperature of higher than 200 DEG C under the conditions of high density and high pollution.

Description

technical field [0001] The invention relates to an extreme pressure lubricant for low freezing point drilling fluid and a manufacturing method thereof. Background technique [0002] Since the 1980s, my country has carried out the research and application of extended-reach wells and horizontal drilling technologies. Various problems encountered in the drilling process have been studied in many aspects. Excessive friction and torque are a major unfavorable factor affecting the drilling process of extended-reach wells and horizontal wells, especially when the inclination angle is greater than 60°. The rapid increase of friction and torque has brought many accidents to drilling engineering, so it is more important to improve the lubricity of drilling fluid and reduce friction. [0003] There are more than 170 brands of lubricants at home and abroad, accounting for about 6% of the total amount of treatment agents, which can be roughly divided into the following categories: surfa...

Claims

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Application Information

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IPC IPC(8): C09K8/035C09K8/06
CPCC09K8/035C09K8/06C09K2208/34
Inventor 王卫东马明宏李常斌陈慧学巩加芹黄建国孙玉卿刘静米文霞
Owner 新疆宏隆石油化工有限公司
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