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A kind of waste potassium salt polymer drilling fluid system gel breaker and preparation method thereof

A technology of polymer and gel breaker, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve problems such as harming the ecological environment and human health, and achieve the effect of preventing environmental pollution, low price and reducing production cost

Active Publication Date: 2022-03-18
CNOOC ENERGY TECH & SERVICES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the waste potassium salt polymer drilling fluid system is stored at the drilling site for a long time, it will seriously endanger the surrounding ecological environment and human health

Method used

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  • A kind of waste potassium salt polymer drilling fluid system gel breaker and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0032] A gel breaker for waste potassium salt polymer drilling fluid system, its composition and parts by weight are:

[0033] Inorganic flocculant (polyaluminum chloride, industrial product) 6g;

[0034] Activated carbon powder (particle size is 200nm) 1g;

[0035] Containing 6g of aggregated sludge depolymerizer;

[0036] Purified water 87g.

[0037] The preparation method of the above-mentioned potassium salt polymer drilling fluid system with a gel breaker, the steps are as follows:

[0038] (1) Add 87g of pure water to the beaker;

[0039] (2) Slowly add 6g of inorganic flocculant polyaluminum chloride into the stirring cup, and stir for 10-15min at 25°C and 300r / min until completely dissolved;

[0040] (3) Slowly add 6g of polymer-containing sludge depolymerizer into the mixing cup, and stir for 20-30 minutes at 25°C and 300r / min until completely dissolved;

[0041] (4) Slowly add 1g of activated carbon powder with a particle size of 200nm into the mixing cup, and s...

Embodiment 2

[0043] A gel breaker for waste potassium salt polymer drilling fluid system, its composition and parts by weight are:

[0044] Inorganic flocculant (polyaluminum chloride, industrial product) 8g;

[0045] Activated carbon powder (particle size is 300nm) 2g;

[0046] Containing sludge depolymerization agent 8g;

[0047] Purified water 82g.

[0048] The preparation method of the above-mentioned potassium salt polymer drilling fluid system with a gel breaker, the steps are as follows:

[0049] (1) Add 82g of pure water to the beaker;

[0050] (2) Slowly add 8g of inorganic flocculant polyaluminum chloride into the mixing cup, and stir for 10-15min at 25°C and 300r / min until completely dissolved;

[0051] (3) Slowly add 8g of polymer-containing sludge depolymerizer into the mixing cup, and stir for 20-30 minutes at 25°C and 300r / min until completely dissolved;

[0052] (4) Slowly add 2g of activated carbon powder with a particle size of 300nm into the mixing cup, and stir slo...

Embodiment 3

[0054] A gel breaker for waste potassium salt polymer drilling fluid system, its composition and parts by weight are:

[0055] Inorganic flocculant (polyferric chloride, industrial product) 10g;

[0056] Activated carbon powder (particle size is 300nm) 3g;

[0057] Containing aggregated sludge depolymerizer 10g;

[0058] Purified water 77g.

[0059] The preparation method of the above-mentioned potassium salt polymer drilling fluid system with a gel breaker, the steps are as follows:

[0060] (1) Add 77g of pure water to the beaker;

[0061] (2) Slowly add 10g of inorganic flocculant polyferric chloride into the mixing cup, and stir for 10-15min at 25°C and 300r / min until completely dissolved;

[0062] (3) Slowly add 10g of polymer-containing sludge depolymerizer into the mixing cup, and stir for 20-30 minutes at 25°C and 300r / min until completely dissolved;

[0063] (4) Slowly add 3g of activated carbon powder with a particle size of 300nm into the mixing cup, and stir s...

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Abstract

The invention relates to a gel breaker for a waste potassium salt polymer drilling fluid system, and its composition and parts by weight are: 6-15 parts of an inorganic flocculant; 1-5 parts of activated carbon powder; 6-6 parts of a polymer-containing sludge depolymerizer 15 parts; purified water 65‑87 parts. Also disclosed is a method for preparing a gel breaker for waste potassium salt polymer drilling fluid system. The gel breaker for the waste potassium salt polymer drilling fluid system of the present invention can effectively reduce the viscosity of the potassium salt polymer drilling fluid, destroy the stability of the drilling fluid system, promote the rapid gel breaking of the drilling fluid, and realize the recovery of the potassium salt polymer drilling fluid system. Reduction and harmless treatment solve the problems of difficulty, high treatment cost and serious environmental hazards in the treatment of waste drilling fluid in the production process of offshore oil fields.

Description

technical field [0001] The invention belongs to the technical field of waste drilling fluid treatment, and relates to a potassium salt polymer drilling fluid system gel breaker, in particular to a potassium salt polymer drilling fluid system gel breaker and a preparation method thereof. Background technique [0002] Drilling fluid is the circulating flushing medium used in the drilling process of the oil field. It is the "blood" of drilling. Hydropower etc. Potassium polymer drilling fluid is a commonly used drilling fluid system in the drilling process. As the drilling progresses, when the performance of the potassium salt polymer drilling fluid cannot meet the drilling requirements, all of it will be circulated to the storage pool. [0003] Potassium salt polymer drilling fluid system contains a large amount of drilling fluid additives such as PH regulator, anti-slumping agent, lubricant, viscosifier, fluid loss reducer, etc. It has the characteristics of high salt conten...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F1/56
Inventor 李小龙杨勇李凤娟宿辉马文杰张丹刘庆月武艺宋涛
Owner CNOOC ENERGY TECH & SERVICES
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