Unlock instant, AI-driven research and patent intelligence for your innovation.

Nano resin emulsion plugging agent for drilling fluid

A technology of resin emulsion and drilling fluid, which is applied in the field of plugging agent for drilling fluid and nano-resin emulsion plugging agent for drilling fluid. It can solve the problem that nano-scale cracks cannot be plugged, the plugging effect is not ideal, and the preparation process is complicated. and other problems, to achieve the effect of fewer types of raw materials, less types, and simple preparation process

Inactive Publication Date: 2018-11-02
河北华运鸿业化工有限公司
View PDF1 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The plugging effect of tiny cracks on the well wall during drilling is inseparable from the performance of the plugging agent. There are many types of plugging agents, and asphalt and humic acid plugging agents are more suitable for plugging larger cracks on the well wall. However, nano-scale fractures cannot be plugged; when the existing plugging agents are used to plug nano-scale micro-fractures on the well wall, slippage is likely to occur, or the rheological properties of the drilling fluid are affected to varying degrees, etc. Phenomenon, resulting in unsatisfactory blocking effect
In addition, the complex preparation process and the variety of raw materials are also factors that cannot be ignored restricting the further improvement of the performance of the plugging agent.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Nano resin emulsion plugging agent for drilling fluid
  • Nano resin emulsion plugging agent for drilling fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A nano-resin emulsion plugging agent for drilling fluid, raw materials include acrylic acid, butyl acrylate, styrene and emulsifier, the mass percentage of each component is 5% acrylic acid, 55% butyl acrylate, 25% styrene, emulsified Agent 15%.

[0025] The preparation steps are as follows: weigh each raw material component according to the mass percentage of each component of the above raw material, mix it with water first, and the amount of water used is 35% of the raw material mass; then place it in an emulsification reaction kettle for emulsification, and the emulsification time is 30min After the emulsification, use a shearing machine to shear the polymer to the nanometer level; finally transfer it to the reactor for heating and curing. The heating and curing is to raise the temperature to 75°C and keep it for 1.5h, then raise the temperature to 85°C and keep it for 1.5h , then raise the temperature to 95°C and keep it warm for 2 hours, cool down after the heating...

Embodiment 2

[0027] A nano-resin emulsion plugging agent for drilling fluid, raw materials include acrylic acid, butyl acrylate, styrene and an emulsifier, the mass percentage of each component is 15% acrylic acid, 45% butyl acrylate, 35% styrene, emulsified agent 5%.

[0028] The preparation steps are as follows: Weigh each raw material component according to the mass percentage of each component of the above raw material, mix it with water first, and the amount of water is 45% of the raw material mass; then place it in an emulsification reaction kettle for emulsification, and the emulsification time is 60min After the emulsification, use a shearing machine to shear the polymer to the nanometer level; finally transfer it to the reactor for heating and curing. The heating and curing is to raise the temperature to 75°C and keep it for 1.5h, then raise the temperature to 85°C and keep it for 1.5h , then raise the temperature to 95°C and keep it warm for 2 hours, cool down after the heating a...

Embodiment 3

[0030] A nano-resin emulsion plugging agent for drilling fluid, raw materials include acrylic acid, butyl acrylate, styrene and emulsifier, the mass percentage of each component of the raw material is 10% of acrylic acid, 50% of butyl acrylate, 30% of styrene, Emulsifier 10%.

[0031] The preparation steps are as follows: Weigh each raw material component according to the mass percentage of each component of the above raw material, mix it with water first, and the amount of water is 40% of the raw material mass; then place it in an emulsification reaction kettle for emulsification, and the emulsification time is 45min After the emulsification, use a shearing machine to shear the polymer to the nanometer level; finally transfer it to the reactor for heating and curing. The heating and curing is to raise the temperature to 75°C and keep it for 1.5h, then raise the temperature to 85°C and keep it for 1.5h , then raise the temperature to 95°C and keep it warm for 2 hours, cool dow...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Median particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a nano resin emulsion plugging agent for drilling fluid and belongs to the field of chemical reagents for well drilling. The nano resin emulsion plugging agent is prepared fromthe following raw materials: acrylic acid, butyl acrylate, styrene and an emulsifier. The plugging agent provided by the invention can be used for efficiently plugging small cracks in a well drillingprocess and also can have certain pressure-bearing and collapse-prevention effects on a well wall; the well drilling difficulty that the fine cracks of the well wall cannot be plugged is solved; thefilter loss of the drilling fluid is reduced; the nano resin emulsion plugging agent has the advantages of few raw material types and simple preparation technology.

Description

technical field [0001] The invention relates to a plugging agent for drilling fluid, in particular to a nano-resin emulsion plugging agent for drilling fluid, and belongs to the field of chemical reagents for drilling. Background technique [0002] With the expansion of oil and gas resources exploration and development, especially the development of unconventional oil and gas resources shale gas and tight oil, the problem of wellbore instability in hard and brittle shale has become an urgent problem to be solved. For micro-fractures, especially nano-scale fractures, the combination of drilling fluid and plugging agent can solve the problem of wellbore instability to a certain extent. [0003] The plugging effect of tiny cracks on the well wall during drilling is inseparable from the performance of the plugging agent. There are many types of plugging agents, and asphalt and humic acid plugging agents are more suitable for plugging larger cracks on the well wall. However, nan...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C09K8/035C09K8/50C09K8/508
CPCC09K8/035C09K8/50C09K8/5083
Inventor 张占山
Owner 河北华运鸿业化工有限公司