Liquid cement mortar capable of being stored

A cement slurry and liquefaction technology, which is applied in the direction of solid waste management, climate sustainability, sustainable waste treatment, etc., can solve the problems of large fluctuations in cement slurry density and affecting the quality of cementing, so as to reduce the cost of cementing and improve the quality of cementing. Cementing efficiency, dust reduction effect

Active Publication Date: 2009-01-07
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the need for complex and large-scale air compressor equipment, mixing equipment and pumping equipment, and also affected by factors such as int

Method used

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  • Liquid cement mortar capable of being stored

Examples

Experimental program
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Effect test

Example Embodiment

[0016] Example 1

[0017] First, weigh each component according to the following proportions: 100 parts of cement, 20 parts of reducing agent, 20 parts of reinforcing agent, 60 parts of water, 2 parts of suspension stabilizer, 3 parts of hydration inhibitor and 1 part of dispersant; The stabilizer includes: 1 part of superfine slag powder, 0.2 part of soil, 0.05 part of carboxymethyl cellulose and 0.1 part by weight of xanthan gum; the hydration inhibitor includes: 1 part of gluconate A, 0.2 part of gluconate B , 0.05 part of lignosulfonate, 1 part of phosphonate, 0.2 part of soluble starch; lightening agent includes: 1 part of bleaching beads, 0.1 part of expanded perlite, 0.5 part of soil; strengthening agent includes: 1 part of ultrafine cement, 1 part of parts of microsilicon, 0.1 parts of aluminum sulfate, 0.3 parts of sulfonated ketone aldehyde condensate; dispersants include: 1 part of sulfonated ketone aldehyde condensate, 0.1 part of sulfonated melamine concentrate, 0...

Example Embodiment

[0021] Example 2

[0022] First, weigh each component according to the following proportions: 100 parts of cement, 35 parts of weighting agent, 44 parts of water, 0.5 part of suspension stabilizer, 2 parts of hydration inhibitor and 0.3 part of dispersant; wherein, the suspension stabilizer includes: 1 1 part ultrafine slag powder, 0.5 part earth, 0.2 part carboxymethyl cellulose and 0.01 part xanthan gum; hydration inhibitors include: 1 part gluconate A, 0.8 part gluconate B, 0.15 part lignosulfonic acid Salt, 0.1 part of phosphonate, 0.01 part of soluble starch; strengthening agent includes: 1 part of ultrafine cement, 1 part of microsilica, 0.5 part of aluminum sulfate, 0.1 part of sulfonated ketone aldehyde condensate; dispersant includes: 1 part of sulfonated Ketone-aldehyde condensate, 0.6 part sulfonated melamine concentrate, 0.6 part naphthalene sulfonate polymer, 0.7 part styrene maleic anhydride polymer and 0.2 part sulfamate polymer; weighting agents include: 1 part...

Example Embodiment

[0025] Example 3

[0026] First, weigh the components according to the following proportions: 100 parts of cement, 36 parts of water, 5 parts of suspension stabilizer, 10 parts of hydration inhibitor and 2 parts of dispersant; wherein, the suspension stabilizer includes: 1 part of ultrafine slag powder , 0.3 part of soil, 0.1 part of carboxymethyl cellulose and 0.05 part of xanthan gum; hydration inhibitors include: 1 part of gluconate A, 0.6 part of gluconate B, 0.1 part of lignosulfonate, 0.5 part of carboxylate acid salt, 0.1 part soluble starch; dispersants include: 1 part sulfonated ketone aldehyde condensate, 0.1 part sulfonated melamine concentrate, 0.4 part naphthalene sulfonate polymer, 0.3 part styrene maleic anhydride polymer and 0.5 part Sulfamate polymers.

[0027] The rest of the preparation process and storage are the same as in Example 1.

[0028] The density of the storable cement slurry prepared with the above ratio is 1.97g / cm 3 , the storage period reach...

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Abstract

The invention discloses liquified cement paste which can be stored. The liquified cement paste comprises 100 parts of cement, 0 to 70 parts of a light-weight additive, 0 to 50 parts of a weighting agent, 0 to 70 parts of an intensifier, 30 to 150 parts of water, 0.5 to 5 parts of a suspension stabilizer, 2 to 10 parts of a hydrate inhibitor and 0.3 to 2 parts of a dispersant. The storage period of the liquified cement paste which can be stored is 3 months; the density of the cement paste can be controlled between 1.30g/cm<3> to 2.10g/cm<3>; the cement paste is applicable for various well temperatures. By using a stimulator and an average retarder, the thickening time can be controlled between 1 and 72 hours; the early compressive strength of the cement paste is high with the 24 hour-strength of more than 14MPa; the cement paste is stable and reliable; the properties of the cement paste are basically kept unchanged before and after the cement paste is stored; other properties of the cement paste such as the fluid loss property, the rheological property and so on can be adjusted to meet the requirement of application by using well cementation additives.

Description

technical field [0001] The invention relates to a storable liquefied cement slurry used in cementing operations where conventional cementing equipment cannot be used, such as marine oil production, workover platforms and land margins. Background technique [0002] At present, cementing and injection operations usually use expensive and complex large-scale equipment such as cement trucks, air compressors, and pressure vessels. For offshore oil fields, it is very difficult to place these equipments on the platform. At the well site, the cement is conveyed by an air compression device and mixed with mixing water and other admixtures in an appropriate proportion to form a pumpable cement slurry, which is driven into the well with pumping equipment. Due to the need for complex and large-scale air compressor equipment, mixing equipment and pumping equipment, and also affected by factors such as interruption of ash delivery and fluctuations in the silo, the density of cement slurry...

Claims

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Application Information

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IPC IPC(8): C04B28/00
CPCC04B2111/00086C04B2201/20C04B28/04Y02W30/91C04B7/527C04B14/104C04B14/185C04B14/308C04B14/368C04B18/12C04B18/141C04B18/146C04B20/002C04B22/142C04B22/148C04B24/003C04B24/04C04B24/06C04B24/18C04B24/22C04B24/223C04B24/226C04B24/2664C04B24/38C04B24/383C04B2103/12C04B2103/22
Inventor 訾士龙王同友彭雷王永松房恩楼熊敏沙林浩王建东高永会霍明江孙富全侯薇
Owner CHINA NAT OFFSHORE OIL CORP
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