Fracturing system with antifreezing performance

Abstract

The invention discloses a fracturing system with the antifreezing performance. The fracturing system comprises a first branch and a second branch, wherein the first branch comprises a clear water tank, a mixing truck, a buffer tank, a sand blender, a fracturing device, a first cock and a throttle manifold connected in sequence; the outlet of the throttle manifold enters the clear water tank through backflow, to form a closed circulating system; the second branch comprises a hot melting wax truck, a dual-machine pump truck, a coiled tubing and a wellhead; the hot melting wax truck, the dual-machine pump truck and the coiled tubing are sequentially connected; the coiled tubing penetrates through the wellhead to enter the shaft bottom; the wellhead in the second branch is connected with the inlet end of the first cock in the first branch through a high-pressure pipeline; and the high pressure pipeline is provided with a second cock close to the inlet end of the first cock. The fracturingsystem has the following beneficial effects: during the construction process, a steamer is adopted to fully swell guanidine gum; and when construction is not carried out, all pipelines are adopted torealize antifreezing and thermal insulation in a circulating manner to avoid pipeline dismantling.

Description

technical field [0001] The invention relates to the field of oilfield fracturing, in particular to a fracturing system with antifreeze performance. Background technique [0002] In winter, the weather is cold, the temperature of the liquid is low, the cross-linking is not good, and the freezing causes equipment and pipeline ice blockage, resulting in safety accidents. In order to ensure the safety of oil field production, "winter rest" is often selected. If construction is required for special reasons, electric heating rods and hot oil are often used. The wax melting car heats the liquid, the liquid tank is insulated with insulation cotton, and the heating belt is used to heat the pipeline and equipment. However, in cold winter conditions, the thermal insulation effect of the insulation cotton is extremely poor. In the case of large displacement construction, the heating effect of the electric heating rod and the hot oil wax melting car is negligible. Make the guar gum adhe...

AI Technical Summary

Problems solved by technology

However, in cold winter conditions, the thermal insulation effect of the insulation cotton is extremely poor. In the case of large displacement construction, the heating effect of the electric heating rod and the hot oil wax melting car is negligible. Make the guar gum adhere to the surface, the temperature is too high, and the electric heating rod burns out

During the construction process, the swelling effect of guar gum is poor, and multiple hot oil melting cars and several heating rods are required

Coiled tubing antifreeze often uses dual-machine pumps to inject liquid, but there is no clear requirement for the amount of injected liquid and the injection time, which often leads to excessive injection amount that damages the formation or too little injection that causes the coiled tubing to freeze. And pipeline antifreeze can only carry out partial circulation and dismantle the pipeline, the above method is time-consuming and laborious and the effect is not good

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