Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Middle-high density elastic liquid rubber plug and well repair method

An elastic liquid, high-density technology, used in chemical instruments and methods, earth-moving drilling, sealing/packing, etc., can solve the problems of killing fluid adsorption and retention damage, difficult to smoothly flow back filtrate, etc., to reduce construction operation costs , Efficient flowback, good stability

Inactive Publication Date: 2017-06-30
SOUTHWEST PETROLEUM UNIV
View PDF6 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a medium-high density elastic liquid rubber plug and a workover method, which aims to improve the problems of the prior art that the killing fluid is adsorbed and retained, and the filtrate is difficult to flow back smoothly

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
  • Middle-high density elastic liquid rubber plug and well repair method
  • Middle-high density elastic liquid rubber plug and well repair method
  • Middle-high density elastic liquid rubber plug and well repair method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Embodiment 1 provides a kind of middle and high density elastic liquid rubber stopper, makes through the following steps:

[0060] Xiang Shengyou 40-85×10 4 Add 5g of acrylamide copolymer to a beaker of 98g of mg / L potassium formate aqueous solution and stir evenly; add 0.02g of thiourea, 0.25g of disodium edetate and trisodium citrate in turn, and then add 0.25g of g chromium acetate, 2g polyethyleneimine, stir well.

[0061] Test the medium and high density elastic liquid rubber stopper obtained in embodiment 1:

[0062] Load the medium-to-high-density elastic liquid rubber stopper obtained in Example 1 into a 50ml sealed bottle, and put it in a high-temperature (100-130°C) oven to observe the dynamic gelation situation. The specific gelation situation is shown in Table 2.

[0063] Table 2 The gelation situation of the medium and high density elastic liquid rubber stopper obtained in Example 1

[0064]

[0065] After testing, the density of the medium and high d...

Embodiment 2

[0067] Embodiment 2 provides a kind of middle and high density elastic liquid rubber stopper, makes through the following steps:

[0068] Xiang Shengyou 40-85×10 4 Add 5g of the mixture of xanthan gum, guar gum and acrylamide copolymer to a 100g beaker of mg / L potassium formate aqueous solution and stir evenly; add 0.035g thiourea and 0.4g disodium ethylenediaminetetraacetate in turn, after homogenization Add 1.5 g of hexamethylenetetramine and 2 g of polyethyleneimine in sequence and stir evenly.

[0069] The middle and high density elastic liquid rubber stopper that present embodiment obtains is tested:

[0070] Load the medium-to-high density elastic liquid rubber stopper obtained in Example 2 into a 50ml sealed bottle, put it into a high-temperature (100-130°C) oven to observe the dynamic gelation situation, see Table 3 for the specific gelation situation.

[0071] Table 3 Example 2 gelation situation

[0072]

[0073] After testing, the density of the medium and hig...

Embodiment 3

[0075] Embodiment 3 provides a kind of middle and high density elastic liquid rubber stopper, makes through the following steps:

[0076] Xiang Shengyou 40-85×10 4 Add 3g of the mixture of acrylamide, tert-butyl copolymer and acrylamide copolymer to a 100g beaker of mg / L potassium formate aqueous solution, and stir evenly; add 0.015g of the mixture of thiourea and sodium sulfite, 0.8g of ethylenediaminetetra After the mixture of disodium acetate and trisodium citrate is homogenized, 0.25g of chromium acetate and 0.4g of polyethyleneimine are added in sequence and stirred evenly.

[0077] The middle and high density elastic liquid rubber stopper that present embodiment obtains is tested:

[0078] Load the medium-high density elastic liquid rubber stopper obtained in Example 3 into a 50ml sealed bottle, put it into a high-temperature (100-130°C) oven to observe the dynamic gelation situation, and the specific gelation situation is shown in Table 4.

[0079] Table 4 Example 3 g...

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
Densityaaaaaaaaaa
Densityaaaaaaaaaa
Login to View More

Abstract

The invention provides a middle-high density elastic liquid rubber plug and a well repair method, which relates to the field of oil gas chemical industry. The middle-high density elastic liquid rubber plug is prepared by the following components in parts by weight through a crosslinking reaction: 3-5 parts of a polymer, 0.25-1.5 parts of a first cross-linking agent, 2-4 parts of a second cross-linking agent, 0.015-0.035 parts of a stabilizing agent, 0.2-0.8 parts of an additive, and 98-102 parts of a weighting agent solution. The weighting agent solution is a potassium formate aqueous solution with concentration of 40-85*10<4> mg / L, and the density can reach 1.2-1.3 g / cm<3>. The invention provides a preparation method of the middle-high density elastic liquid rubber plug. The middle-high density elastic liquid rubber plug has good fluidity at low temperature, can generate the crosslinking reaction at high temperature under well, and has the advantages of adjustable density, temperature resistance, compression resistance, good pumpability, good stability, no requirement of a rubber breaking technology, and high efficiency flowing back.

Description

technical field [0001] The invention relates to the field of oil and gas chemical industry, in particular to a medium-high density elastic liquid rubber plug and a workover method. Background technique [0002] With the advancement of science and technology, in recent years, researchers at home and abroad have continuously researched and tackled key problems, and have successively developed many protective reservoir working fluid systems suitable for workover and completion operations of high temperature, medium and high pressure oil and gas wells. [0003] The working fluid containing solid phase is to add solid phase particle materials compatible with reservoir pores into the liquid phase, but the solid phase particles are easy to enter the deep part of the production layer under the action of positive pressure difference, causing blockage in the production layer, resulting in induced blowout. It is difficult to remove the plugging, and it must be pickled before putting in...

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): C09K8/512C09K8/68E21B33/134
CPCC09K8/512C09K8/685C09K8/887E21B33/134
Inventor 贾虎陈昊杨欣雨吴晓虎
Owner SOUTHWEST PETROLEUM UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com