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Slurry additive, drilling mud, and cement slurry

一种钻探泥浆、添加剂的技术，应用在土方钻采、钻孔的组合物、化学仪器和方法等方向，能够解决增加成本等问题，达到抑制粘度上升和高温脱水、低成本的效果

Active Publication Date: 2017-02-22
KURARAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods have a certain effect on improving the performance of the dehydration reducing agent at high temperature, but it is necessary to temporarily produce a water-soluble vinyl alcohol-based polymer and then react with the cross-linking agent, so it is easy to increase the cost

Method used

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  • Slurry additive, drilling mud, and cement slurry
  • Slurry additive, drilling mud, and cement slurry
  • Slurry additive, drilling mud, and cement slurry

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0107] [Preparation Example 1] (Preparation of dry PVA (PVA-1))

[0108] In a 250L reaction tank equipped with a stirrer, a nitrogen gas inlet, an ethylene inlet, an initiator addition port, and a delayed solution addition port, 127.5 kg of vinyl acetate and 22.5 kg of methanol were put in and the temperature was raised to 60°C, followed by nitrogen blowing for 30 minutes. Bubble for nitrogen replacement. Then, the pressure of the reaction tank reaches 4.9Kg / cm 2 way to import vinyl. Prepare a reaction initiation solution having a concentration of 2.8 g / L by dissolving 2,2'-azobis(4-methoxy-2,4-dimethylvaleronitrile) (AMV) as an initiator in methanol , The reaction initiating solution was subjected to nitrogen bubbling to perform nitrogen replacement, and this solution was used as an initiator solution. 45 mL of this initiator solution was poured into a reaction tank adjusted to 60° C. to initiate polymerization. Introduce ethylene during the polymerization process, and ma...

preparation example 2~17

[0119] [Preparation Example 2~17] (Preparation of dry PVA (PVA-2)~(PVA-17))

[0120] Using the same method as in Preparation Example 1, dry PVA (PVA-2)~(PVA-17) having the properties shown in Table 1 were prepared.

[0121] [Table 1]

[0122]

Embodiment 1

[0124]

[0125] 300 g of ion-exchanged water was taken in a cup of a Hamilton Beach mixer, 6 g of bentonite ("Telure E" from Terunaitto Co., Ltd.) was added and stirred thoroughly, and then left to stand for 24 hours to fully swell the bentonite. On the other hand, put dry PVA (PVA-1) on a sieve with a nominal mesh size of 1.00mm (16mesh), take 1.5g of dry PVA (PVA-1) powder that passes through the sieve, and use this powder as drilling mud Additives were added to the bentonite dispersion to obtain drilling mud (D-1).

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PUM

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Abstract

The present invention provides a slurry additive that, when used in a construction slurry (for example, in a drilling mud or drilling cement slurry used in well drilling, etc.) or the like, is low cost and can suppress dehydration at high temperatures as well as viscosity increase. The present invention is a powdered slurry additive that contains a vinyl alcohol polymer, the vinyl alcohol polymer having a solubility of 25% or less when soaked for 3 hours in 60 DEG C hot water, a degree of saponification of 99.5 mol% or more, an average degree of polymerization of 1,500-4,500, and a 1,2-glycol bond content of 1.8 mol% or less. The slurry additive passes through a sieve that has a nominal opening of 1.00 mm.

Description

technical field [0001] The present invention relates to an additive for slurry, a drilling mud and a cement slurry, and a method for producing the drilling mud and the cement slurry. Background technique [0002] Slurries for civil engineering and construction represented by drilling mud and drilling cement slurry have been used in mines and the like for extracting buried materials such as oil and natural gas. [0003] Drilling mud serves the following functions: for example, transporting drilled rock slices and / or drilling cuttings, etc., improving the lubricity of drill bits and / or drill pipes, burying holes in porous foundations, and counteracting reservoir pressure due to hydrostatic pressure ( pressure from the bedrock), etc. The drilling mud generally achieves target properties by having water and bentonite as main components and further adding barite, salt, clay, and the like. Suitable flow properties such as temperature stability and not being significantly affecte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/12C08F8/12C08F16/06C08L29/04C09K8/44E21B21/00
CPCC09K8/487C09K8/5083C04B28/02C04B40/0042C04B2111/70C08F216/06C09K8/035C04B24/02C04B24/2623C09K8/24C09K8/467C04B16/04C04B2103/0057C04B2103/46C04B2201/10
Inventor 熊木洋介斋藤靖知
Owner KURARAY CO LTD
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