Glycan derivative of solid lubricant for drilling liquid and preparation method thereof

A technology of solid lubricant and drilling fluid, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., which can solve the problems of reducing drilling friction, easy wear of drill pipes and drilling tools, high drilling friction and easy sticking, etc. , to achieve the effects of reducing drilling frictional resistance, convenient storage and transportation, and good high-temperature fluid loss control

Active Publication Date: 2018-12-21
河北小钻科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a polysaccharide derivative of a solid lubricant for drilling fluid, which has good lubricating properties, can reduce drilling friction, has good compatibility with drilling fluid, and reduces the wear and tear of drilling tools such as drill pipes. At the same time, it has good high-temperature fluid loss reduction, salt resistance, easy biodegradability, no pollution to the formation, and is environmentally friendly to solve the problems of poor compatibility with drilling fluid, high drilling friction and easy sticking in the drilling process. The problem of easy wear of drill pipe and drilling tools

Method used

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  • Glycan derivative of solid lubricant for drilling liquid and preparation method thereof

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Effect test

Embodiment 1

[0018] Example 1: The glycan derivatives of solid lubricants for drilling fluids of the present invention are made from raw materials with the following weight ratios: 35 parts polyethylene glycol 400, 1 part boric acid, 1 part catalyst, white oil 10 parts, 5 parts surfactant, 1 part defoamer, 25 parts mica powder, 30 parts talc powder. The white oil is a combination of three raw materials of No. 7 white oil, No. 10 white oil, and No. 15 white oil. The weight ratio of the three raw materials of No. 7 white oil, No. 10 white oil and No. 15 white oil is 1: 1.5:1.5; The surfactant is a combination of Tween T-80 surfactant and AEO-9 surfactant. The weight of Tween T-80 surfactant and AEO-9 surfactant is less than The ratio is 1:1.5; the catalyst is ferric chloride; the defoamer is polydimethylsiloxane.

[0019] The preparation method of the solid lubricant polyglycan derivative for drilling fluid includes the following process steps: ① Synthesis of borate polyethylene glycol ester: ...

Embodiment 2

[0020] Example 2: The glycan derivatives of solid lubricants for drilling fluids of the present invention are made from raw materials with the following weight ratios: 40 parts polyethylene glycol 400, 2 parts boric acid, 1.95 parts catalyst, white oil 15 parts, 3 parts surface active agent, 2 parts defoamer, 20 parts mica powder, 25 parts talc powder. The white oil is No. 7 white oil; the surfactant is a combination of two raw materials, Tween T-80 surfactant and AEO-9 surfactant, and Tween T-80 surfactant and AEO- 9 The weight ratio of the surfactant is 1:1.5; the catalyst is a combination of two raw materials, ferric chloride and aluminum chloride, and the weight ratio of ferric chloride to aluminum chloride is 1:2; The defoamer is polyoxypropylene oxide ethylene glycerol ether.

[0021] The preparation method of the solid lubricant polyglycan derivative for drilling fluid includes the following process steps: ① Synthesis of borate polyethylene glycol ester: adding 40 parts o...

Embodiment 3

[0022] Example 3: The glycan derivatives of solid lubricants for drilling fluids of the present invention are made from raw materials with the following weight ratios: 45 parts polyethylene glycol 400, 3 parts boric acid, 2 parts catalyst, white oil 20 parts, 2 parts surfactant, 3 parts defoamer, 15 parts mica powder, 20 parts talc powder. The white oil is a combination of No. 10 white oil and No. 15 white oil. The weight ratio of the two raw materials of No. 10 white oil and No. 15 white oil is 1:1.5; the surfactant is AEO -9 surfactant; the catalyst is aluminum chloride; the defoamer is polydimethylsiloxane.

[0023] The preparation method of the polyglycan derivative of solid lubricant for drilling fluid includes the following process steps: ① Synthesize polyethylene glycol borate: add 45 parts of polyethylene glycol 400 to the reactor according to the above weight ratio, and Add 3 parts of boric acid and 2 parts of catalyst to ethylene glycol 400, slowly heat to 110°C, turn ...

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Abstract

The invention relates to a glycan derivative of a solid lubricant for a drilling liquid and a preparation method thereof. The solid lubricant is prepared from the following raw materials of 35 to 45 parts of polyethylene glycol 400, 1 to 3 parts of boric acid, 1 to 2 parts of catalyst, 10 to 20 parts of white oil, 2 to 5 parts of surfactant, 1 to 3 parts of defoamer, 15 to 25 parts of mica powder,and 20 to 30 parts of talcum powder. The preparation method comprises the following steps of synthesizing polyethylene glycol borate, and preparing the solid lubricant. The solid lubricant has the advantages that the change quantity of appearance viscosity is + / -3.0, the reduction rate of lubrication coefficient is greater than or equal to 80%, and the reduction rate of adhering coefficient is greater than or equal to 50%; the lubricating property is good, the drilling friction drag is decreased, the compatibility with the drilling liquid is good, and the abrasion of drilling tools of drill stems and the like is reduced; the good comprehensive properties, such as high-temperature filter loss and salt-resistant property, are realized; the preparation is simple, the property is stable, thestorage and transportation are convenient, the production cost is low, the poison and pollution are avoided, the biodegradability is realized, and the environment-friendly effect is realized.

Description

Technical field [0001] The invention relates to a petroleum drilling fluid auxiliary, in particular to a solid lubricant polysaccharide derivative for drilling fluid. The invention also relates to a preparation method of the solid lubricant polysaccharide derivative for drilling fluid. Background technique [0002] During the drilling process, with the continuous strengthening of drilling efforts, the problems of excessive drilling friction and downhole safety have become more and more prominent. Complicated conditions such as downhole sticking occur frequently, drill pipes and other drilling tools wear intensified, and bottom hole stability deteriorates. Adding lubricant to drilling fluid to reduce downhole friction is one of the main technical means to prevent and solve drilling safety problems. One. Traditional drilling fluid lubricant materials are used in drilling operations, and they have poor compatibility with drilling fluids, and seriously pollute the formations, makin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/03C09K8/035
CPCC09K8/03C09K8/035C09K2208/02C09K2208/34
Inventor 陈利赵秀平
Owner 河北小钻科技有限公司
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