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Nano-embedded emulsified lubricant

A membrane emulsification and lubricant technology, applied in the field of lubricants, can solve the problems of large friction resistance, serious supporting pressure, and poor drilling fluid lubrication effect in horizontal wells, so as to reduce the relative friction resistance, improve the structural effect, and improve the plugging effect. Effect

Active Publication Date: 2016-09-07
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

[0005] The present invention aims at overcoming the problems of large horizontal well friction resistance, serious supporting pressure and poor drilling fluid lubrication effect existing in the background technology, and provides a nano-embedded emulsified lubricant

Method used

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  • Nano-embedded emulsified lubricant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Prepare the components in parts by weight, and prepare the low-fluorescence nano-ball embedded emulsified lubricant according to the following production steps:

[0027] (1) Mix compound emulsifier by weight

[0028] Non-ionic complex emulsifier: Span-80: Tween-80: tripolyglycerol monostearate ratio is 5:0.95:3,

[0029] Composite emulsifier: non-ionic composite emulsifier: the ratio of alkyl alcohol phosphate sodium salt is 4.5:1.

[0030] (2) Prepare raw materials

[0031] Modified paraffin 10g, composite emulsifier 3g, alkalinity regulator 0.5g, nanometer graphite powder 2g, water 84.5g.

[0032] (3) Preparation of emulsified lubricant

[0033] Add 84.5g of water to the reactor, heat up to 50°C, stir slowly at 400r / min, add 10g of paraffin and 3g of compound emulsifier into the reactor, heat up to 75°C while stirring, increase the stirring speed to 800r / min, and stir for 40min. Mix in the alkalinity regulator, continue to stir for 40 minutes, slowly stir to room ...

Embodiment 2

[0035] (1) Mix compound emulsifier by weight

[0036] Process is identical with embodiment 1.

[0037] (2) Prepare raw materials

[0038] Modified paraffin 20g, composite emulsifier 5g, alkalinity regulator 1g, nanometer graphite powder 1g, water 73g.

[0039] (3) Preparation of emulsified lubricant

[0040] Add 74g of water to the reaction kettle, raise the temperature to 50°C, stir slowly at 500r / min, add 20g of paraffin wax and 5g of compound emulsifier into the reaction kettle, raise the temperature to 80°C while stirring, increase the stirring speed to 1000r / min, stir for 40min, mix in Alkalinity regulator, continue to stir for 40 minutes, slowly stir to room temperature, mix 1g of nano-graphite powder, stir at 1000r / min at room temperature for 40 minutes, stop stirring, pack and discharge.

Embodiment 3

[0042] (1) Mix compound emulsifier by weight

[0043] Process is identical with embodiment 1.

[0044] (2) Prepare raw materials

[0045] Modified paraffin wax 30g, composite emulsifier 11g, alkalinity regulator 3g, nanometer graphite powder 0.5g, water 58.5g.

[0046] (3) Preparation of emulsified lubricant

[0047] Add 58.5g of water to the reactor, heat up to 50°C, stir slowly at 600r / min, add 30g of paraffin and 11g of compound emulsifier into the reactor, heat up to 90°C while stirring, increase the stirring speed to 1200r / min, and stir for 40min. Mix in the alkalinity regulator, continue to stir for 40 minutes, slowly stir to room temperature, mix in 0.5 g of nano-graphite powder, stir at 1000 r / min for 40 minutes at room temperature, stop stirring, pack and discharge.

[0048] The performance evaluation of this nano-embedded emulsified lubricant is as follows:

[0049] (1) The lubricant in Example 2 was tested for compatibility in various water-based drilling fluids...

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Abstract

The invention relates to a nano film-embedded emulsion lubricant and mainly solves the problems about high frictional resistance of a horizontal well, serious backing pressure and poor lubricating effect of drilling fluid. The nano film-embedded emulsion lubricant comprises the following components in percentage by weight: 10 to 30 percent of modified paraffin, 3 to 11 percent of a compound emulsifier, 0.5 to 3 percent of an alkalinity modifier, 0.5 to 2 percent of nano graphite powder and the balance of water. The nano film-embedded emulsion lubricant provides an emulsion lubricant which has low fluorescence, is provided with a nano ball material and has capability of forming an anti-adhesion lubricating film between the stratum and a drilling tool; a prepared drilling fluid system has a good lubricating property; a mud cake is fine; the filter loss is low; the class of florescence is low; the nano film-embedded emulsion lubricant has excellent thermal stability and cold-resisting stability; drilling efficiency of the horizontal well is greatly improved.

Description

technical field [0001] The invention relates to a lubricant in the field of oil field drilling, in particular to a nano-embedded emulsified lubricant. Background technique [0002] With the increasing demand for energy, the pace of oil exploration and development is accelerating. In order to improve the efficiency of oil and gas recovery, the development of horizontal wells and directional wells is gradually improved. These special drilling technologies constantly put forward new requirements for the drilling fluid system. [0003] The biggest difference between horizontal well and directional well drilling and vertical drilling is that in directional drilling, the frictional resistance is large, the well wall is prone to instability, and complex situations such as sand sinking and sticking are prone to occur. The lubricity of the drilling fluid depends on the success of drilling makes an important impact. The development of drilling fluids for horizontal wells and directi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035C09K8/57
Inventor 杨东梅刘永贵宋涛宋程刘振华王宇
Owner BC P INC CHINA NAT PETROLEUM CORP
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