Drilling mud cake hardening enhancer

A technology of reinforcing agent and drilling mud, which is applied in the field of drilling fluid additives, and can solve the problems of poor sealing quality of bonding strength and cementing interface

Active Publication Date: 2017-08-15
刘铁卜
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The present invention aims at overcoming the problems of poor bonding strength between two cementing interfaces and poor sealing quality of the cementing interface, and provides a drilling mud cake hardening enhancer

Method used

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  • Drilling mud cake hardening enhancer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 9 g of sodium hydroxyethylidene diphosphate-sodium polyacrylate, 40 g of modified calcium magnesium silicate whiskers, 11 g of titanate coupling agent JTW-201, 18 g of hydrated silicon dioxide, and 12 g of polyether organic disilicate sodium 10g of polycarboxylic acid comb macromolecule MF-508 is mixed to make drilling mud cake hardening enhancer.

Embodiment 2

[0027] Weigh 12g of sodium hydroxyethylidene diphosphate-sodium polyacrylate, 37g of modified calcium magnesium silicate whiskers, 12g of titanate coupling agent JTW-201, 16g of hydrated silicon dioxide, and 13g of polyether organic disilicate sodium 10g of polycarboxylic acid comb macromolecule MF-508 is mixed to make drilling mud cake hardening enhancer.

Embodiment 3

[0029] Weigh 8 g of sodium hydroxyethylidene diphosphate-sodium polyacrylate, 41 g of modified calcium magnesium silicate whiskers, 9 g of titanate coupling agent JTW-201, 17 g of hydrated silicon dioxide, and 13 g of polyether organic disilicate sodium 12g of polycarboxylate comb macromolecule MF-508 is mixed to make drilling mud cake hardening enhancer.

[0030] The components used in the examples are all commercially available. The manufacturer of the titanate coupling agent JTW-201 is Nanjing Pinning Coupling Agent Co., Ltd., and the manufacturer of the polycarboxylate comb-like macromolecule MF-508 is Qinhuangdao Concrete Construction Admixture Co., Ltd.

[0031] The hardening enhancer prepared in the above-mentioned embodiment is added to the drilling fluid according to the ratio of 1.5-3% by weight and volume after drilling and passing through the well as required, and the performance of the drilling fluid is controlled to meet the requirements of drilling engineering a...

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Abstract

The invention relates to a drilling mud cake hardening enhancer, and mainly solves the problems of poor well cementation two-interface cementing strength and poor well cementation interface sealing quality in the prior art. The drilling mud cake hardening enhancer is characterized by comprising the following components by the weight percentage: 8-12% of a cleaning agent, 37-45% of a hardening agent, 9-12% of a coupling agent, 16-20% of an inducer, 8-14% of a reactant, and 6-12% of a chelating agent. In a process of well completion stage of well drilling, the drilling mud cake hardening enhancer allows properties of a mud cake to be intrinsically changed, so that the mud cake is hardened and has a affinity with a cement sheath, and the well cementation interface sealing quality and the well cementation two-interface cementing strength are improved.

Description

[0001] Technical field: [0002] The invention relates to a drilling fluid additive used in the field of petroleum drilling engineering, in particular to a drilling mud cake hardening enhancer. [0003] Background technique: [0004] The root cause of the outstanding quality problem of the cementing interface is the mud cake embedded between the cement slurry and the formation wall. Studies have shown that as long as there is a mud cake, no matter how thin it is, there will be different degrees of peeling between the cement sheath and the formation rock to form micro-cracks, resulting in a decrease in the interface bond strength. At present, the following technical methods for improving the bonding quality of the cementing interface all have disadvantages, and cannot fundamentally solve the problem of the bonding quality of the cementing interface. [0005] (1) Commonly used physical or mechanical methods [0006] Apply turbulent flow displacement, wall shearing, movable casi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/03
CPCC09K8/03
Inventor 刘铁卜刘泽旭
Owner 刘铁卜
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