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A kind of preparation method of high softening point asphalt composition granule

A technology of asphalt and composition with high softening point, applied in the direction of drilling composition, chemical instruments and methods, building structures, etc., can solve the problem of the reduction of effective components of asphalt particles, difficulty in plugging and filter reduction, and particle deformation Limited capacity and other issues, to achieve the effect of reducing energy consumption, increasing performance, and increasing deformability

Active Publication Date: 2017-10-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method will reduce the effective components in the asphalt particles, and due to the introduction of other components, it may cause damage to the mud system during use.
[0007] In addition, when simple asphalt particles with high softening point are applied in the drilling fluid system, due to the relatively limited deformation ability of the particles, the viscoelasticity is relatively poor, and when there are irregular pores in oil and gas layers, they cannot be well embedded in them.
Moreover, the higher the softening point, the more obvious the brittleness and hardness of the asphalt, and it is difficult to achieve a good plugging and fluid loss reduction effect

Method used

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  • A kind of preparation method of high softening point asphalt composition granule

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Take 100g of oxidized pitch (softening point: 146.5°C) and 120g of kerosene in a container, stir at room temperature (25°C) for 20 minutes, and prepare the mother liquor after being fully mixed. Take 75g of 100-mesh styrene-butadiene rubber powder, put the prepared asphalt mother liquor in a watering can, spray evenly on the rubber powder particles, and stir while spraying. After spraying, send it into the reactor and feed compressed air, adjust the pressure reducing valve so that the gas inlet pressure of the reactor is 0.20MPa, keep the temperature of the reactor at 185°C, stir for 60 minutes, then raise the temperature to 210°C, and stir for 25 minutes , then add 6.2g cetyltrimethylammonium chloride and put it in a freezer to freeze (freezing temperature -35°C, freezing time is 12 hours), take it out and put it into a vibrating sieve (80-mesh standard sieve is used for the bottom of the sieve) After vibrating and pulverizing for 20 seconds, high softening point aspha...

Embodiment 2

[0034] Take 100g of deasphalt (softening point: 157.2°C) and 160g of diesel oil in a container, stir at 40°C for 15 minutes, and mix thoroughly to obtain the mother liquor. Take 46g of 120-mesh butyl rubber powder, put the prepared asphalt mother liquor in a watering can, spray evenly on the rubber powder particles, and stir while spraying. After spraying, send it into the reactor and feed compressed air, adjust the pressure reducing valve so that the gas inlet pressure of the reactor is 0.25MPa, keep the temperature of the reactor at 200°C, stir for 80 minutes, then raise the temperature to 260°C, and stir for 40 minutes , and then add 7.5g sodium lignosulfonate and place it in a freezer for freezing (freezing temperature -25°C, freezing time is 14 hours). After taking it out, put it into a vibrating sieve (100-mesh standard sieve is used as the bottom of the sieve) and vibrate and pulverize for 30 seconds, and the asphalt composition particles with high softening point can b...

Embodiment 3

[0036]Take 100g of natural asphalt (softening point: 138.8°C) and 120g of kerosene in a container, stir at 30°C for 20 minutes, and prepare the mother liquor after fully mixing. Take 52g of 100-mesh neoprene rubber powder, put the prepared asphalt mother liquor in a watering can, spray evenly on the rubber powder particles, and stir while spraying. After the spraying is finished, send it into the reactor and feed compressed nitrogen gas, adjust the pressure reducing valve so that the gas inlet pressure of the reactor is 0.18MPa, keep the temperature of the reactor at 180°C, stir for 70 minutes, then raise the temperature to 230°C, and stir for 25 minutes , then add 9.0g of secondary alcohol sodium sulfate and place it in a freezer for freezing (freezing temperature -30°C, freezing time is 10 hours), take it out and put it into a vibrating sieve (80-mesh standard sieve is used at the bottom of the sieve) to vibrate and pulverize for 30s, and sieve The high softening point aspha...

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Abstract

The invention discloses a method for preparing high softening point asphalt composition particles, which includes the following contents: (1) fully mixing high softening point asphalt and a compatibilizer to prepare asphalt mother liquor, and then evenly spraying the asphalt mother liquor on the glue (2) The material obtained in step (1) is sent to the reactor, and compressed gas is introduced from the bottom of the reactor for blow-off treatment, and the compatibilizer is in gas phase and exits from the upper part of the reactor It is discharged and can be recycled after being cooled. After the stripping is completed, the stripping product is cooled to room temperature, then frozen and pulverized to obtain high softening point asphalt composition particles. The high softening point asphalt composition particles of the present invention have a higher softening point, better high temperature performance and deformation ability, and have better dispersibility, and can be applied to water-based drilling fluids. The preparation method is simple and the operation is convenient. It can play a good plugging and fluid loss reduction effect in deep drilling.

Description

technical field [0001] The invention relates to a preparation method of high softening point asphalt composition granules, in particular to a high softening point asphalt composition granule used in oil field drilling and a preparation method thereof. Background technique [0002] With the development of the petroleum industry and the continuous expansion of the drilling field, the application of bitumen-based plugging agents in oilfield drilling has attracted more and more attention. Bituminous plugging agents generally contain water-insoluble bitumen particles and have a certain softening point. When the temperature and pressure in the wellbore are high enough, the asphalt particles soften and deform, and are squeezed into the micro-fractures of the well wall, preventing the drilling fluid from penetrating through the micro-fractures, and effectively sealing the formation together with the mud cake. Bituminous substances are extremely effective anti-slump agents and oil l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L9/06C08L23/22C08L11/00C08L9/02C08K5/01C09K8/035
Inventor 傅丽姚汉荣郭皎河张建峰刘树华
Owner CHINA PETROLEUM & CHEM CORP
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