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Preparation method of high-load long-acting slow-release scale inhibition particles

A high-load, long-lasting technology for chemical instruments and methods, descaling and water softening, mining wastewater treatment, etc. to achieve stable particle structure

Active Publication Date: 2020-05-08
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no such public technology in China

Method used

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  • Preparation method of high-load long-acting slow-release scale inhibition particles
  • Preparation method of high-load long-acting slow-release scale inhibition particles
  • Preparation method of high-load long-acting slow-release scale inhibition particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 100 parts of 50wt.% 2-phospho-1,2,4-tricarboxylic acid butane (PBTCA) aqueous solution and 10 parts of diatomaceous earth carry out vacuum negative pressure loading, the vacuum loading pressure is -0.1MPa, and kneading in the kneader 40 minutes, and then dried in a vacuum oven at 60° C. for 48 hours, and pulverized the dried solid mixture into powder.

[0030] Knead 15 parts of polylactic acid and 5 parts of diethyl phthalate for 30 minutes, knead 10 parts of kaolin and 6 parts of starch for 30 minutes; mix and knead the above raw materials for 90 minutes to form an effective bond, and then extrude It is extruded in the machine and processed into round particles with a diameter of 1 to 5 mm. Spray 3 parts of 10wt.% polyvinyl alcohol, 0.5wt.% glutaraldehyde mixed solution and dry to crosslink.

Embodiment 2

[0032] 70 parts of 50wt.% hydroxyethylidene diphosphonate (HEDP) aqueous solution and 10 parts of diatomaceous earth carry out vacuum negative pressure loading, and the vacuum loading pressure is-0.3MPa, knead in kneader for 60 minutes, then in vacuum oven Dry at 70°C for 30 hours, and pulverize the dried solid mixture into powder.

[0033] Knead 18 parts of polylactic acid and 3 parts of diethyl phthalate for 30 minutes, knead 20 parts of kaolin and 15 parts of carboxymethyl cellulose for 30 minutes; mix and knead the above raw materials for 60 minutes to form an effective bond, It is extruded in a screw extruder and processed into round particles with a diameter of 1-5 mm. Spray 3 parts of 10wt.% polyvinyl alcohol, 0.5wt.% glutaraldehyde mixed solution and dry to crosslink.

Embodiment 3

[0035] 90 parts of 50wt.% diaminetetramethylene phosphonic acid (HDTMPA) aqueous solution and 18 parts of diatomaceous earth carry out vacuum negative pressure loading, vacuum loading pressure is-0.2MPa, knead in the kneader for 50 minutes, then in the vacuum oven Dry at 75°C for 24 hours, and crush the dried solid mixture into powder.

[0036] Mix 25 parts of polylactic acid and 6 parts of diethyl phthalate evenly, mix 15 parts of quartz stone with 20 parts of gelatin; mix and knead the above raw materials for 60 minutes to form an effective bond, in the screw extruder Extruded into round particles with a diameter of 1 to 5 mm. Spray 3 parts of 10wt.% polyvinyl alcohol, 0.5wt.% glutaraldehyde mixed solution and dry to crosslink.

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Abstract

The invention discloses a preparation method of high-load long-acting slow-release scale inhibition particles, and belongs to the field of oilfield chemistry. A scale inhibitor and an inorganic nano-carrier serving as one of slow-release components are assembled into a homogeneous whole in the form of a solid solution, and the homogeneous whole is coated with a layer of controllable swelling polymer. When the polymer swells in an environmental medium, the scale inhibitor is slowly released. A dual-release control mechanism of polymer swelling and desorption of the scale inhibitor from the inorganic nano-carrier is utilized, so that the scale inhibitor is slowly released in the wellbore, and the protection effect on the wellbore is prolonged.

Description

technical field [0001] The invention belongs to the field of oilfield chemistry, and relates to downhole environmental scale inhibitor materials for oil and gas wells, in particular to a high-load long-acting slow-release scale inhibitor granular material. Background technique [0002] Scaling phenomenon in oilfield well water is an important problem that needs to be solved urgently in the process of oilfield development. Scaling will cause blockage and corrosion of injection, production and flooding system equipment, and reduce oil recovery efficiency. [0003] In order to solve the scaling problem, the liquid antiscalant is usually directly injected downhole from the wellhead, so as to prevent the formation of scale and prolong the service life of the equipment. The liquid antiscalant will stick to the pipe wall during the injection process, and part of the antiscalant injected downhole will be lost with the production fluid. It needs to be injected repeatedly to ensure th...

Claims

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Application Information

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IPC IPC(8): C02F5/14C02F103/10
CPCC02F5/145C02F2103/10
Inventor 杨冬芝户乔伟
Owner BEIJING UNIV OF CHEM TECH
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