High-energy mixer for well cementation in oil and gas fields

Abstract

The invention relates to a mixing equipment for well cementation in oil and gas fields, in particular to a high-energy mixer for well cementation in oil and gas fields, comprising a shell, a mortar supply pipe, a water supply pipe and a secondary mortar mixing pipe, wherein the secondary mortar mixing pipe is of a single pipeline structure; and a valve is installed on the secondary mortar mixing pipe. The secondary mortar mixing pipe is changed to be of the single pipeline structure in the high-energy mixer for well cementation in oil and gas fields,, so that the structure is simplified, the flow velocity of secondary mortar-mixed cement paste entering to the shell is increased and the blockage condition is avoided; a water-dividing thimble is fixed on the water supply pipe, so that the manual regulation is not needed, the labor intensity is reduced, the possible error is avoided during the manual regulation, the flow stability is ensured, the flow velocity is increased and the mortar mixing effect is improved; and a hard tungsten carbide alloy layer is coated on the inner wall of each pipe, so that the wear resistance is improved and the service life is prolonged.

Description

technical field [0001] The invention relates to a slurry mixing device used in well cementing in an oil and gas field, in particular to a high-energy mixer for well cementing in an oil and gas field. Background technique [0002] The high-energy mixer is the key component of the oilfield cementing vehicle for the initial mixing of cement ash and clean water. The high-energy mixers currently used generally have complex structures, easy blockage, low mixing efficiency, high labor intensity, and short service life. The reasons are as follows: [0003] 1. The secondary ash mixing pipe adopts the bull head type double pipeline structure, the structure is complex, and the cement slurry is easy to form blockage in the shell; [0004] 2. The water inlet of the upper water pipe needs to manually adjust the position of the water diversion thimble, which is labor-intensive, resulting in unstable water flow direction and velocity; [0005] 3. The mixer is welded and formed by common m...

AI Technical Summary

Problems solved by technology

[0002] The high-energy mixer is the key component of the oilfield cementing vehicle for the initial mixing of cement ash and clean water. The high-energy mixers currently used generally have complex structures, easy blockage, low mixing efficiency, high labor intensity, and short service life. The reasons are as follows:

[0003] 1. The secondary ash mixing pipe adopts the bull head type double pipeline structure, the structure is complex, and the cement slurry is easy to form blockage in the shell;

[0004] 2. The water inlet of the upper water pipe needs to manually adjust the position of the water diversion thimble, which is labor-intensive, resulting in unstable water flow direction and velocity;

[0005] 3. The mixer is welded and formed by ordinary materials, and the service life is short

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