Oil base drilling cuttings cleaning agent and cleaning method thereof

A technology for oil-based drilling cuttings and cleaning agent, which is applied in the directions of detergent compounding agent, detergent composition, chemical instrument and method, etc. Oil effect, enhanced emulsification and solubilization, reusable low effect

Inactive Publication Date: 2018-04-06
中海石油环保服务(天津)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the poor adaptability of chemical cleaning agents to oil-based cuttings limits its development.

Method used

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  • Oil base drilling cuttings cleaning agent and cleaning method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 1 part of sodium chloride and 1.75 parts of sodium silicate to 90 parts of water, stir until completely dissolved; then add 5 parts of n-butanol, stir until dissolved, then add 2 parts of sodium lauryl sulfate, stir until dissolved; finally Add 0.25 parts of polyethylene glycol p-isooctyl phenyl ether and stir until dissolved to obtain an oil-based drilling cuttings cleaning agent.

[0027] In a mixing tank equipped with a stirrer, add 20kg of oil-based drilling cuttings cleaning agent, and at a stirring speed of 200rpm, add 10kg of oil-based drilling cuttings, stir and mix for 20min, and centrifuge in a centrifuge (relative centrifugal force 800g, centrifugation time 5min) After separation, drill cuttings with low residual oil and oil-based cleaning agent containing base oil are obtained. The oil-based cleaning agent containing base oil can be recovered by means of demulsification separation (such as air flotation separation after adding a demulsifier) ​​to recover...

Embodiment 2

[0029] Add 2 parts of sodium chloride and 2 parts of sodium silicate to 90.5 parts of water, stir until completely dissolved; then add 3 parts of ethanol, stir until dissolved, then add 2 parts of sodium dodecylbenzenesulfonate, stir until dissolved; finally Add 0.5 parts of Tween-80 and stir until dissolved to obtain an oil-based drilling cuttings cleaning agent.

[0030] In a stirring tank equipped with a stirrer, add 20kg of oil-based drilling cuttings cleaning agent, and at a stirring speed of 500rpm, add 40kg of oil-based drilling cuttings, stir and mix for 30min, and centrifuge in a centrifuge (relative centrifugal force 4000g, centrifugation time 5min) After separation, drill cuttings with low residual oil and oil-based cleaning agent containing base oil are obtained. The oil-based cleaning agent containing base oil can be recovered by means of demulsification separation (such as air flotation separation after adding a demulsifier) ​​to recover the oil-based cleaning ag...

Embodiment 3

[0032] Add 1 part of sodium sulfate and 2 parts of sodium silicate to 93.7 parts of water, stir until completely dissolved; then add 2 parts of amyl alcohol, stir until dissolved, then add 1 part of sodium dodecylbenzenesulfonate, stir until dissolved; finally Add 0.3 parts of polyethylene glycol p-isooctyl phenyl ether and stir until dissolved to obtain an oil-based drilling cuttings cleaning agent.

[0033] In a mixing tank equipped with a stirrer, add 20kg of oil-based drilling cuttings cleaning agent, and at a stirring speed of 100rpm, add 5kg of oil-based drilling cuttings, stir and mix for 10 minutes, and centrifuge in a centrifuge (relative centrifugal force 400g, centrifugation time 20min) After separation, drill cuttings with low residual oil and oil-based cleaning agent containing base oil are obtained. The oil-based cleaning agent containing base oil can be recovered by means of demulsification separation (such as air flotation separation after adding a demulsifier)...

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Abstract

The invention belongs to the field of cleaning of oil base drilling cuttings, and particularly relates to an oil base drilling cuttings cleaning agent and a cleaning method thereof. The oil base drilling cuttings cleanings agent contains an epoxypropane or ethylene oxide nonionic surfactant, a sulfate or sulphosalt negative ion surfactant, short chain alcohol, sodium silicate, sodium salt except sodium silicate and water. The invention provides an oil base drilling cuttings cleaning agent which is high in oil removal efficiency, convenient in operation and low in cost and can be used repeatedly and a cleaning method thereof.

Description

technical field [0001] The invention belongs to the field of oil-based drilling cuttings cleaning, in particular to an oil-based drilling cuttings cleaning agent and a cleaning method thereof. Background technique [0002] With the continuous development of oil and gas exploration and development, oil-based drilling fluid has developed rapidly and its application scale has gradually expanded because of its good lubricity, good for fixing the wellbore of deep wells, suitable for high temperature environment and complex terrain. Oil-based drilling fluid takes oil as the continuous phase, and is usually composed of a large amount of diesel oil or mineral oil, emulsifiers and other chemicals and clay. When using oil-based drilling fluid, the oil-based drilling cuttings composed of drilling fluid and cuttings (referred to as oil-based cuttings) are continuously transported from the rock formation to the surface by drilling equipment. The disposal of a large amount of oil-based d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11D1/83C11D3/04C11D3/08C11D3/20C11D3/60C09K8/52
CPCC09K8/52C11D1/146C11D1/22C11D1/721C11D1/83C11D3/046C11D3/08C11D3/201C11D11/0023
Inventor 白鹤赵广宇肖成磊刘涛王新新马蒸钊曹兴涛郭兵杨庭何晓晨
Owner 中海石油环保服务(天津)有限公司
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