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

Natural gas hydrate control agent

A technology of hydrate and natural gas, applied in drilling composition, gas/liquid distribution and storage, pipeline system, etc., to reduce the cost of use, prolong the formation time, and improve the inhibition effect.

Active Publication Date: 2015-09-16
北京沃特普特环境科技有限公司
View PDF8 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved by the present invention is to provide a natural gas hydrate prevention and control agent to overcome the problem that the existing composite inhibitors cannot achieve the best inhibitory effect at an appropriate cost

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

[0038] The natural gas hydrate prevention and control agent Q1 is composed of 40% vinylpyrrolidone, sodium acrylic acid, acrylamide polymerized terpolymer, 25% fatty alcohol polyoxyalkyl ether, 30% ethylene glycol , 5% hydroxyethylene diphosphonic acid.

[0039] The natural gas hydrate prevention and control agent Q1 was tested on-site. The test site was Well No. 22 in a domestic gas field, and the following test data were obtained:

[0040] Statistical Table 1 of Field Test Results of Well No. 22 in a Domestic Gas Field

[0041] Add date

[0042] December 23

[0043] The validity period of existing hydrate inhibitors is generally 3-4 days, and the cost is 32 yuan / kg. The validity period of this embodiment is 6-7 days, which is an increase of 2-4 days (the shortest number of days in this embodiment With the difference of the existing longest number of days-the difference of the longest number of days in this embodiment and the existing shortest number of d...

Embodiment 2

[0045] The natural gas hydrate prevention and control agent Q2 is composed of 60% vinylpyrrolidone, sodium acrylate, acrylamide polymerized terpolymer, 10% low-foaming surfactant, specifically Huntsman TERIC 168, 28% ethanol, 2% aminotrimethylene phosphonic acid.

[0046] The natural gas hydrate prevention and control agent Q2 was tested on-site. The test site was Well No. 22 in a domestic gas field, and the following test data were obtained:

[0047] Statistical Table 2 of Field Test Results of Well No. 22 in a Domestic Gas Field

[0048] Add date

[0049] The validity period of existing hydrate inhibitors is generally 3-4 days, and the cost is 32 yuan / kg. The validity period of this embodiment is 6-7 days, which is 2-4 days longer than that, and the growth rate is 50%-133 %, and the cost is 24 yuan / kg.

Embodiment 3

[0051] The composition of natural gas hydrate prevention and control agent Q3 is: 50% vinylpyrrolidone, sodium acrylate, acrylamide polymerized terpolymer, 14% low-foaming wetting agent, specifically selected Dow DOW TRITON low-foaming agent Wetting agent CF-10, 35% sorbitol, 1% sodium tripolyphosphate.

[0052] The natural gas hydrate prevention and control agent Q3 was tested on-site. The test site was Well No. 22 in a domestic gas field, and the following test data were obtained:

[0053] Statistical Table 3 of Field Test Results of Well No. 22 in a Domestic Gas Field

[0054] Add date

[0055] The validity period of existing hydrate inhibitors is generally 3-4 days, and the cost is 32 yuan / kg. The validity period of this embodiment is 7-8 days, which is 3-5 days longer than that, and the growth rate is 75%. -167%, and the cost is 23 yuan / kg.

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 relates to a natural gas hydrate control agent which comprises the following components in percentage by weight: 40-60% of dynamical inhibitor, 10-25% of surfactant, 15-35% of organic alcohol and 1-5% of corrosion inhibitor. The surfactant is one of fatty alcohol polyoxy alkyl ether, a low-foaming surfactant and a low-foam wetting agent. By using the fatty alcohol polyoxy alkyl ether, low-foaming surfactant or low-foam wetting agent as the surfactant, no additional defoaming agent is needed, thereby lowering the use cost. On the premise of not increasing the cost, the control agent controls the weight percent of the dynamical inhibitor at 40-60%, can effectively prolong the hydrate formation time, and has higher hydrate inhibition effects.

Description

technical field [0001] The invention relates to the field of hydrate inhibitors, in particular to a natural gas hydrate prevention and control agent. Background technique [0002] During the extraction, processing and transportation of oil and natural gas, the small molecular gas in oil and gas interacts with water under certain temperature and pressure conditions to form ice-like solid hydrates, which can block wellbores, pipelines, valves and Equipment, thus affecting the normal operation of natural gas exploitation, gathering and transportation and processing. Generally speaking, there are three forms of hydrates formed in wellbore and surface pipelines: [0003] (1) The smooth tube wall becomes rough due to the attachment of hydrate. One part of the fluid passes and the other part slides off; [0004] (2) The hydrate forms a non-dense mesh plug in the tube. During the lifting process, the gas passes through the non-dense hydrate mesh plug, and part of the liquid auto...

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): C09K8/524F17D1/04
CPCC09K8/524C09K2208/22F17D1/04
Inventor 王程刘尚军
Owner 北京沃特普特环境科技有限公司
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