Rand products, designing any machine for your arduous construction can't avoid failures at work, just like people will get sick. What we need to do is to solve the problem in time, and the specific problem is to adopt a specific method to prevent the progress of the work. Generally, the drilling process will be directed to different rock formations. The most frequently encountered is the sand layer and the gypsum layer, which is more difficult to handle.
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Let's first talk about the sand layer. When drilling such a layer, we must increase the viscosity of the drilling fluid and increase the content of bentonite in the drilling fluid. Generally, the requirement is more than 10%. Add a single seal to enhance the wall-forming property of the drilling fluid. Appropriately reduce the displacement and reduce the erosion of the convective sand layer. The drill must be closed with thick mud with viscosity greater than 80s before drilling to ensure that the drilling, electric measurement and casing are small.
Now for the gypsum layer, it is best to pre-treat the drilling fluid before drilling the gypsum layer, reduce the solid phase, reduce the sticking, add the anti-gypsum treatment agent in advance, and prepare the gypsum layer in advance according to the construction data of the adjacent well. Treatment agent. Increase the pH of the drilling fluid to improve the ability of small drilling machinery drilling fluids to resist gypsum contamination. If the drilling fluid is not treated in advance, we can remove the calcium ions by adding soda ash, calcium removal viscosity reducer, etc., and add the anti-calcium viscosity reducing agent to control the adhesion and reduce the filtration. Loss of agent, anti-collapse agent and other materials to maintain the stability of drilling fluid performance.
Due to the diversity of address structure, it is normal to encounter some problems in drilling. The right medicine is the basic knowledge that we should learn and strengthen.
This article comes from: Xuanhua drilling rig, down-the-hole drilling rig, impactor, water well drilling rig, anchor drilling rig, Xuanhua drilling rig fittings, full hydraulic down-the-hole drilling rig, hydraulic down-the-hole drilling rig
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Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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