Foamed cement slurry well cementation pry device

Abstract

The invention provides a foamed cement slurry well cementation pry device. The device comprises a skid-mounted base, and all parts of the device are mounted on the skid-mounted base, wherein the partscomprise a liquid nitrogen pressurizing gasification system used for pressurizing liquid nitrogen and gasifying the liquid nitrogen into high-pressure nitrogen, a foaming liquid pumping system used for pressurizing foaming liquid, a foam generation system comprising a first pipeline and a foam generator, a control system and a power generation system. The first pipeline is used for receiving thepressurized foaming liquid and cement paste from a cement pump truck to form cement paste containing the foaming liquid, and the foam generator is used for receiving the high-pressure nitrogen and thecement paste containing the foaming liquid.

Description

technical field [0001] The invention relates to the technical field of petroleum cementing, in particular to a foam fluid operating device suitable for oilfields, in particular to a cementing device for foam cement slurry. Background technique [0002] Cement loss is one of the common problems in the field of cementing. With the deepening of domestic exploration and development, the leakage rate of cement cement also shows a sharp increase trend. In order to improve the cementing quality and reduce the risk of annular pressure, there is an urgent need for low-density cement cementing. Compared with conventional cement, due to the characteristics of low density and high strength, foamed cement slurry has advantages in preventing leakage, preventing channeling and improving displacement efficiency. [0003] Currently, there are two ways to prepare foamed grout, namely chemical foaming and physical foaming. [0004] For chemical foaming, a certain amount of foaming agent is ...

AI Technical Summary

Problems solved by technology

Foreign countries, represented by Halliburton, mainly develop nitrogen-filled foam cement slurry cementing. In the past ten years, my country has only begun to study physical foam cementing methods, such as invention patents CN200810046582.1 and CN201010263300.0. Use an air compressor to mix the foam liquid first, and then mix the foam liquid with conventional cement slurry. This method causes the foam liquid and cement slurry to separate or cannot be effectively mixed due to the low pressure of the foam and high pressure of the cement slurry. At the same time, it is difficult to meet the high pressure operation of oil field cementing

The utility model patent CN201427353Y mentions a mechanical air distribution foaming unit for inflatable foam cement slurry, which is composed of a liquid distribution system, an air distribution foam system and an intelligent expert monitoring system. The main system needs to be installed on two skid bases above, the equipment is huge

And the equipment adopts diesel engine and electric control heating, which consumes a lot of energy

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