High-elasticity rapid plugging agent and preparation method

A plugging agent and high elasticity technology, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as unsatisfactory plugging effect, inability to soak for a long time, decomposition and failure, etc., to avoid repeated leakage, good Inhibition effect, effect of improving suppression performance

Inactive Publication Date: 2020-11-17
中石化石油工程技术服务有限公司 +2
View PDF10 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The bridging plugging material has a simple construction process and low cost, and is the most commonly used in the field, but some materials have poor temperature resistance and are prone to decomposition and failure at high temperatures, resulting in repeated leakage of the leaky layer
At the same time, these materials have problems such as sealing the door and not being able to soak for a long time, and the plugging effect is sometimes not ideal

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add 6% elastic graphite, 2% nano-silicon dioxide particles, and 0.5% modified polyvinyl alcohol-based sponge to the propylene glycol base liquid in sequence, and stir continuously at high speed (2000 rpm) during the addition process for 3 hours. After that, a high-elastic and quick plugging agent is formed.

Embodiment 2

[0021] In the mannitol base liquid, add a mixture of 15% by weight rubber particles and ultrafine calcium carbonate (mass ratio 1:2), 10% nano-graphene, and 5% modified polyvinyl alcohol-based sponge, and add Stir continuously at high speed (3000 rev / min) during the process. After stirring for 2.2 hours, a high-elastic and rapid plugging agent is formed.

Embodiment 3

[0023] Add 10% lithium bentonite, 8% nano-alumina, and 3% modified polyvinyl alcohol-based sponge to the sorbitol base solution in sequence, and stir continuously at high speed (4000 rpm) during the addition process for 2 hours After that, a high-elastic and quick plugging agent is formed.

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

No PUM Login to view more

Abstract

The invention provides a high-elasticity rapid plugging agent and a preparation method. The high-elasticity rapid plugging agent is composed of a variable framework material and a filling material. The plugging agent is prepared in a base fluid. The plugging agent can deform at a stratum leakage position under wellbore pressure to crack and plug leakage, the formed plugging layer is firm, the plugging success rate can be effectively improved, and repeated leakage is avoided. The plugging material has deformability and can be compressed to deform to enter a deep part of a crack to form a firm plugging layer for plugging, so that repeated leakage can be avoided; the contained base fluid has the characteristic of good dispersion effect, and has a relatively good inhibition effect, so that theinhibition performance can be further improved in the drilling fluid, and collapse of a well wall before and after leaking stoppage is avoided; the framework material has rich open pore structures, and a net rack structure is formed at the cracks, so that a blocking layer is formed.

Description

technical field [0001] The invention relates to a chemical auxiliary material for petroleum drilling, in particular to a plugging agent for drilling fluid loss and a preparation method thereof. Background technique [0002] Lost circulation is the phenomenon that various working fluids leak into the formation under the action of pressure difference during various downhole operations such as drilling, cementing and completion, testing or workover. Once lost circulation occurs, it will not only delay drilling time, lose drilling fluid, damage oil and gas layers, interfere with geological logging work, increase drilling costs, but also easily cause a series of complicated situations such as pipe sticking, blowout, and well collapse, and even lead to the scrapping of the wellbore. cause huge economic losses. At present, the commonly used plugging materials in plugging construction are mostly bridging plugging materials and chemical gel plugging materials. [0003] Chemical plu...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/467C09K8/03
CPCC09K8/467C09K8/03
Inventor 刘振东李公让韩来聚周守菊李卉明玉广张敬辉孙浩玉
Owner 中石化石油工程技术服务有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products