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Prepolymer of elastomer material for screw drill and preparation method thereof

A technology of elastomer material and screw drilling tool, which is applied in drilling equipment, driving device for drilling in wellbore, earth-moving drilling, etc., can solve the problems of low peel strength of hardness interface, weak temperature resistance, etc., and achieve good reactivity and processability, prolonging the service life, and realizing the effect of industrialization

Inactive Publication Date: 2020-04-24
SHANGHAI PUJIA DRILLING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It aims to overcome the shortcomings of traditional screw drilling tools such as weak temperature resistance, low hardness, tear strength and interface peeling strength; to provide a new type of elastomer material preparation technology for screw drilling tools; to realize the pre-preparation of elastomer materials Adjustable and controllable polymer structure; improve processability and simplify processing technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This embodiment provides a method for preparing a prepolymer of an elastomer material for a screw drilling tool, and the specific steps are as follows:

[0031] Step (1) Put 20kg of toluene diisocyanate (TDI) in a reaction kettle, heat up to 50°C, and carry out negative pressure dehydration treatment for 1 hour;

[0032] Step (2) takes by weighing respectively hydroxyl-terminated liquid nitrile rubber (10kg), polytetrahydrofuran glycol (6kg), polyethylene glycol (4kg) with a molecular weight of 2000, and gradually adds them dropwise to step (1) in sequence, Continuous reaction at 50°C for 8 hours;

[0033] Step (3) After the reaction in step (2) is finished, cool naturally to room temperature to obtain the prepolymer slurry of the elastomer material for the screw drilling tool of the present invention;

[0034] Step (4) Perform chemical calibration on the prepolymer slurry of the elastomer material obtained in step (3), so as to determine the content of subsequent curi...

Embodiment 2

[0038] This embodiment provides a method for preparing a prepolymer of an elastomer material for a screw drilling tool, and the specific steps are as follows:

[0039] Step (1) Place 20kg of isophorone diisocyanate (IPDI) in a reaction kettle, heat up to 50°C and perform negative pressure dehydration treatment for 1 hour;

[0040] Step (2) takes respectively by weighing terminal hydroxyl liquid nitrile rubber (10kg), polytetrahydrofuran diol (6kg), the trimethylolpropane polyether (4kg) that molecular weight is 4000, gradually adds dropwise to step (1) successively in order ), continue to react at 50°C for 8 hours;

[0041] Step (3) After the reaction in step (2) is finished, cool naturally to room temperature to obtain the prepolymer slurry of the elastomer material for the screw drilling tool of the present invention;

[0042] Step (4) Perform chemical calibration on the prepolymer slurry of the elastomer material obtained in step (3), so as to determine the content of subs...

Embodiment 3

[0045] This embodiment provides a method for preparing a prepolymer of an elastomer material for a screw drilling tool, and the specific steps are as follows:

[0046] Step (1) Place 20kg of isophorone diisocyanate (IPDI) in a reaction kettle, heat up to 50°C and perform negative pressure dehydration treatment for 1 hour;

[0047] Step (2) takes respectively by weighing terminal hydroxyl liquid nitrile rubber (6kg), polytetrahydrofuran glycol (10kg), the propylene glycol polyether (4kg) that molecular weight is 2000, adds dropwise gradually in step (1) successively in order, in Continuous reaction at 60°C for 8 hours;

[0048] Step (3) After the reaction in step (2) is finished, cool naturally to room temperature to obtain the prepolymer slurry of the elastomer material for the screw drilling tool of the present invention;

[0049] Step (4) Perform chemical calibration on the prepolymer slurry of the elastomer material obtained in step (3), so as to determine the content of s...

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Abstract

The invention provides a prepolymer of an elastomer material for a screw drill and a preparation method thereof. The prepolymer comprises a component A and a component B, the component A comprises hydroxyl-terminated liquid rubber, polytetrahydrofuran glycol and polyether polyol; and the component B comprises at least one of isocyanate, cyanate ester and a cyano compound; wherein the mass ratio ofthe hydroxyl-terminated liquid rubber to polytetrahydrofuran glycol to polyether polyol is (0.2 to 1.0): (0.2 to 1.0): (0.2 to 1.0). Through structural design, different molecular chain segments withdifferent proportions are introduced, so that the molecular structure of the prepolymer has both rigid and flexible chain segments, the structure of the prepolymer becomes adjustable and controllable; and due to the introduction of the active groups, the prepolymer also shows good reaction activity and process-ability. The reactive elastomer material with excellent hardness, tearing strength, tensile strength and the like is obtained and can be used as an elastomer material for a screw drill and applied to the technical field of well drilling.

Description

technical field [0001] The invention belongs to the technical field of organic polymers, and in particular relates to a prepolymer of an elastomer material for a screw drilling tool and a preparation method thereof, and the prepolymer of the elastomer material can be used as a screw drilling tool material in drilling technology field. Background technique [0002] With the increasing complexity of the drilling environment and the increasing difficulty of mining, the working conditions of drilling operations are becoming more and more harsh, which has higher and higher requirements for the comprehensive performance of elastomer materials for screw drilling tools. At the same time, the tensile strength, tear strength, peel strength, wear resistance, hardness, and temperature resistance of elastomer materials for screw drilling tools will directly affect the service life of the material and drilling costs under specific conditions of use. Therefore, improving the comprehensive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/69C08G18/48
CPCC08G18/698C08G18/4804C08G18/4854C08G18/7621C08G18/755C08G18/4833C08G18/4808C08G18/4812C08G18/4829C08G18/4825C08G18/696C08G18/12C08G18/307C08G18/3206C08G18/3218C08G18/48C08G18/753C08L9/02E21B4/02
Inventor 郭丁瑜张洪瑞朱明慧刘屹然刘颛瑞张光顺刘孝波
Owner SHANGHAI PUJIA DRILLING TECH CO LTD
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