Continuous acid mixing equipment

Abstract

The invention provides continuous acid mixing equipment which comprises a continuous acid preparing vehicle and a skid-mounted buffer tank. The continuous acid preparing vehicle comprises a chassis vehicle, a liquid adding pump, an original acid centrifugal pump, a clear water centrifugal pump, a discharging centrifugal pump, an acid mixing tank, an acid-alkali tank, an automatic feeding machine and a dry powder adding device, the liquid adding pump, the original acid centrifugal pump, the clear water centrifugal pump, the discharging centrifugal pump, the acid mixing tank, the acid-alkali tank, the automatic feeding machine and the dry powder adding device are arranged on the chassis vehicle, the clear water centrifugal pump is connected with the acid mixing tank through a clear water manifold, the original acid centrifugal pump is connected with the acid mixing tank through an original acid manifold, a first stirrer and a nozzle are arranged inside the top of the acid mixing tank, and an acid-alkali indicator for displaying acidity and alkalinity in the acid-alkali tank is arranged on the acid-alkali tank; the skid-mounted buffer tank comprises a skid frame, a buffer tank, a skid-mounted engine and a centrifugal pump, the buffer tank, the skid-mounted engine and the centrifugal pump are arranged on the skid frame, the discharging centrifugal pump on the continuous acid preparing vehicle is connected with the buffer tank through a discharging manifold, and a second stirrer is arranged in the buffer tank. Through combined use of the continuous acid preparing vehicle and the skid-mounted buffer tank, continuous mixing of acid is realized; by arranging an acid mist removing device in the acid mixing tank, a lot of acid mist and foam generated during acid mixing are removed effectively, so that the whole continuous acid mixing equipment is safer in operating performance.

Description

technical field [0001] The invention relates to acid mixing equipment used for acid mixing operations in oil and gas fields, in particular to continuous acid mixing equipment. Background technique [0002] In recent years, my country has gradually carried out exploration and development of unconventional oil and gas reservoirs such as tight oil and gas reservoirs and shale gas reservoirs, and the fracturing stimulation technology has gradually shown the trend of large-scale and staged fracturing of horizontal wells. Acid fracturing, as an important technology for increasing production and injection in oilfields, plays a key role in increasing reserves and production in carbonate oil and gas fields. At present, the commonly used liquid preparation method in construction is to prepare the total liquid volume in advance before construction, which requires a large amount of water tanks, acid tanks, liquid preparation equipment and other auxiliary equipment for a long time. In or...

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Problems solved by technology

At present, the commonly used liquid preparation method in construction is to prepare the total liquid volume in advance before construction, which requires a large amount of water tanks, acid tanks, liquid preparation equipment and other auxiliary equipment for a long time. In order to ensure the progress of construction, the liquid volume There is a lot of surplus, resulting in extra cost waste, and the concentration of the acid solution prepared in advance is fixed, but the formation situation is uncertain, and the feedback after the acid solution reaches the formation is difficult to meet the expectations of the construction design. Adjust the acid solution on site The concentration is difficult, the acid liquid is easy to volatilize, it is highly corrosive to equipment and pipelines, and it is easy to cause harm to the human body

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