Recyclable anti-collapse type polymer mud and preparation method thereof

Abstract

The invention discloses recyclable anti-collapse type polymer mud and a preparation method thereof. The recyclable anti-collapse type polymer mud is prepared from the following raw materials in partsby weight: 2.5-5 parts of a tackifier, 4-11 parts of a filtrate reducer, 70-80 parts of a solid phase film formation agent, 0.05-0.1 part of a dispersant, 0.1-0.2 part of a lubricant, 30-60 parts of sodium carbonate and 70-110 parts of water. The anti-collapse type polymer mud which comprises vegetable gum as a main tackifying component, a sulfonate copolymer as the filtrate reducer and plant fiber powder as a main solid phase film formation component has a filter loss less than 15mL within 30 minutes, a viscosity of 18-30s, a mud film thickness of 2-4mm and a sand content smaller than 5%, a mud film can be uniform and dense, and compared with common polymer mud and conventional bentonite mud, the mud solves the problems of hole shrinkage and hole collapse in water-sensitive geological hole drilling construction.

Description

technical field [0001] The invention relates to the technical field of pile foundation wall protection mud, in particular to a recyclable anti-collapse polymer mud and a preparation method thereof. Background technique [0002] During the drilling construction process, many problems caused by the instability of the wellbore caused by water-sensitive geological water absorption and hydration and dispersion, such as reducing the diameter of the wellbore, collapsing, jamming the pipeline, and even causing the drilling damage process, will not only bring economic losses, It will also lead to safety hazards. Therefore, it is very necessary to choose drilling fluid reasonably. Oil-based drilling fluid is always the best choice to alleviate the problem of wellbore instability, but its widespread use is limited due to its high cost and serious environmental damage. Therefore, it is an inevitable trend to gradually replace oil-based drilling fluids with water-based drilling fluids w...

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Problems solved by technology

However, if plugging materials or shale inhibitors are used alone, the effect cannot meet expectations, so plugging materials and shale inhibitors are generally used in combination. Although the current research on water-based drilling fluids has achieved many results, However, the wellbore instability caused by clay expansion still faces great challenges in drilling complex formations, so it is urgent to develop new water-based anti-slump drilling fluids; And the width of the conveying track is adjusted. At the same time, in the process of polymerization, the polymerization effect is poor, and the mud on the inner wall of the equipment cannot be cleaned, resulting in waste

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