Novel floatable solid foam scrubbing rod and preparation method thereof

Abstract

The invention belongs to the technical field of oil-gas field gas extraction production and discloses a novel floatable solid foam scrubbing rod. The novel floatable solid foam scrubbing rod comprises, by mass, 40-60 parts of a foaming agent, 10-20 parts of a foam stabilizer, 10 parts of a filler, 5 parts of a solubilizer, 3 parts of a fluidizer and 2 parts of a lubrication release agent. The foaming agent adopts one or more of dodecyl oxethyl sulphobetaine, dodecyl hydroxypropyl sulphobetaine and dodecyl sulfopropyl betaine; the foam stabilizer adopts one or two of coconut oil monoethanolamide and dodecyl polyglucoside; the filler adopts thiourea; the solubilizer adopts water soluble solid salt; the fluidizer adopts polyvinyl alcohol; and the lubrication release agent adopts one or two of polyethylene glycol 6000 and sodium benzoate. The foam scrubbing rod is small than or equal to shaft liquid loading in density and can float on the shaft liquid loading, the influence of liquid loading on foaming is reduced, foam scrubbing performance is further improved, the foaming quantity is increased, and the liquid drainage effect is improved.

Description

Technical field [0001] The invention belongs to the technical field of gas production and production in oil and gas fields, and relates to a bubble row rod for bubble discharge gas production, in particular to a novel floatable solid bubble row rod and a preparation method thereof. The bubble row rod of the present invention is particularly suitable for water flooded wells with low gas production. Background technique [0002] As gas wells enter the middle and late stages of gas production, gas reservoir pressure and natural gas flow velocity gradually decrease, so that formation water or condensate cannot be carried out of the wellbore with the gas flow, resulting in edge water advancement and bottom water rise. After a period of time, these liquids gathered at the bottom of the well and the liquid column was formed, which seriously affected the normal production of the gas well. If this situation continues, excessive fluid accumulation will form in the wellbore, and the back p...

AI Technical Summary

Problems solved by technology

The design of three fan blades increases the contact area between the foaming agent and the bottom well fluid to a certain extent, and shortens the dissolving time of the foam stripping rod in the bottom well fluid, but the preparation of this foam stripping rod is complicated and not easy. Easy to store and use

[0008] (1) The density of foam row sticks is usually 1.2 ~ 1.4g / cm 3 , greater than the wellbore fluid density 1.05 ~ 1.15g / cm 3 After being put into the wellbore, it will gradually sink into the bottom of the well. The deeper the foam row rod is immersed in the bottom of the well, the greater the force of the accumulated fluid pressure on the foam row rod, and the less likely it is to generate air bubbles, so that the foaming effect cannot be fully exerted, and serious Those who will block the bottom of the well;

[0009] (2) The contact surface between the cylindrical foam row rod and the bottom of the well is small, and the dissolution rate is relatively slow, which cannot effectively play the role of the foam row rod

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