Low toxicity and low fluorescence lubricant for drilling fluid and preparation method thereof

A lubricant and drilling fluid technology, applied in the field of lubricants, can solve the problems of insufficient lubricating performance, single variety of lubricants, and poor friction-reducing effect, so as to solve the problems of reduced performance, high lubricating efficiency and high use efficiency. Effect

Active Publication Date: 2015-08-12
TIANJIN BO XING ENG SCI & TECH LIMITED COMPANY OF CNPC +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In recent years, foreign research on drilling fluid lubricants is mainly directed towards synthetic oil lubricants with high efficiency, low toxicity, no fluorescence, and no damage to reservoirs, while domestic lubricants are relatively single, mainly concentrated in vegetable oils and There are two types of mineral oil, and some products have some problems in the field use process, such as: (1) poor friction reduction effect, lubrication performance can not meet the technical requirements of drilling fluid for extended reach wells and horizontal wells; (2) drilling fluid Poor emulsification performance, resulting in oil-water stratification; (3) High fluorescence level, which interferes with geological logging; (4) Causes drilling fluid foaming, and a large amount of defoaming agent must be added to the drilling fluid for defoaming treatment; (5) Temperature resistance Poor, especially with vegetable oil based lubricants

Method used

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  • Low toxicity and low fluorescence lubricant for drilling fluid and preparation method thereof
  • Low toxicity and low fluorescence lubricant for drilling fluid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1 A low-toxic, low-fluorescence, high-temperature-resistant, high-efficiency extreme-pressure lubricant for drilling fluid

[0021] (1) Raw material ratio

[0022] It is composed of the following components by weight fraction: 50% of base oil, 30% of emulsifier, 5% of penetrating agent, 5% of freezing point regulator, and 10% of extreme pressure agent.

[0023] (2) Preparation method

[0024] First add 50% industrial white oil to the reaction kettle, stir and heat up to 40-50°C, then add 20% Span-20 and 10% OP-7 for emulsification reaction, stir for 1 hour, then raise the temperature to 50°C -60°C, add 5% sodium alkyl sulfosuccinate and stir for 30 minutes, then add 10% chlorinated paraffin, continue stirring for 30 minutes, then stop heating, then add 5% poly-1,4 dioxanyl dimethylol The base alcohol is cooled while stirring, and poured out from the reaction kettle after being cooled to room temperature to obtain the low-toxicity, low-fluorescence, high-temper...

Embodiment 2

[0035] As shown in Table 2, the lubricant of Example 1 can withstand a high temperature of 180°C, has no adverse effect on the rheological properties and wall-building properties of the base slurry, and has almost no foaming. Example 2 A low-toxic, low-fluorescence, high-temperature-resistant, high-efficiency extreme-pressure lubricant for drilling fluid

[0036] (1) Raw material ratio

[0037] It consists of the following components by weight fraction: 60% of base oil, 25% of emulsifier, 5% of penetrating agent, 5% of freezing point regulator, and 5% of extreme pressure agent.

[0038] (2) Preparation method

[0039] First add 60% industrial white oil to the reaction kettle, stir, heat up to 40-50°C, then add 25% Span-80 for emulsification reaction, stir for 1 hour, raise the temperature to 50-60°C, add 5 After stirring for 30 minutes with % sulfated castor oil, add 5% 5-sulfurized olefin, stop heating after continuing to stir for 30 minutes, then add 5% poly-1,4-dioxanyl d...

Embodiment 3

[0042] Example 3 A low-toxicity, low-fluorescence, high-temperature-resistant, high-efficiency extreme-pressure lubricant for drilling fluid

[0043] (1) Raw material ratio

[0044] It consists of the following components by weight fraction: 70% of base oil, 20% of emulsifier, 3% of penetrating agent, 2% of freezing point regulator, and 5% of extreme pressure agent.

[0045] (2) Preparation method

[0046] First add 70% industrial white oil to the reaction kettle, stir, heat up to 40-50°C, then add 20% OP-10 for emulsification reaction, stir for 1 hour, raise the temperature to 50-60°C, add 3% Sodium alkyl sulfonate or secondary alkyl sulfonate was stirred for 30 minutes, then added 5% phosphate, continued stirring for 30 minutes, then stopped heating, then added 2% poly-1,4 dioxane dimethylol alcohol, while Cool while stirring, pour out from the reaction kettle after cooling to room temperature, and obtain the low-toxicity, low-fluorescence, high-temperature-resistant, high...

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Abstract

The invention discloses a low toxicity and low fluorescence lubricant for drilling fluid. The lubricant consists of the following components by weight: 50-90 parts of base oil, 5-30 parts of an emulsifier, 2-5 parts of a penetrant, 1-5 parts of a condensation point modifier and 2-10 parts of an extreme pressure agent. The preparation method is as below: adding 50-90 parts of base oil into a reactor, stirring and heating to 40-50 DEG C, then adding 5-30 parts of an emulsifier for an emulsified reaction, stirring for 1 h, raising the temperature to 50-60 DEG C, adding 2-5 parts of penetrant, stirring for 30 min, then adding 2-10 parts of the extreme pressure agent, continuing stirring for 30 min, stopping heating, then adding 1-5 parts of the condensation point modifier, cooling with stirring to room temperature, and pouring the lubricant out of the reactor. The lubricant provided by the invention has the advantages of low toxicity, low fluorescence, high lubrication efficiency, high temperature toleration and no foaming, and can satisfy the requirements of different wells such as large displacement well.

Description

technical field [0001] The invention relates to the field of lubricants, in particular to a lubricant for drilling fluid. Background technique [0002] With the gradual development of my country's drilling business, the pace of marching towards the ocean has been gradually accelerated, and the exploration and development of offshore oil and gas fields has been strengthened. Deep wells, ultra-deep wells, directional wells, highly deviated and extended There are more and more wells with special conditions such as long-density open-hole wells, and the difficulty of drilling will continue to increase, and the complex situations encountered will become more prominent. Efficient drilling fluid lubricants play a very important role in ensuring the construction of these complex process wells. [0003] At present, extended-reach wells have become an important means for foreign offshore oil companies to realize offshore oil production onshore and efficient development of marginal oil f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035C09K8/24
CPCC09K8/035C09K8/24C09K2208/34
Inventor 刘建军刘晓栋马学勤张勇马永乐王彪朱红卫
Owner TIANJIN BO XING ENG SCI & TECH LIMITED COMPANY OF CNPC
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