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Process for the reduction of the relative permeability to water in oil-bearing formations,Disinfection walking vehicle,Self-cleaning nozzle

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3 results about "Injection pressure" patented technology

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Process for the reduction of the relative permeability to water in oil-bearing formations

InactiveUS6474413B1Reducing possible extensionFluid removalDrilling compositionInjection pressurePolymer science

A process for the selective and controlled reduction of permeability to water in oil-bearing formations made up of sandstone or limestone, the process comprising the injection of a slug of polymer aqueous solutions having a polarity opposite to the polarity of the rock, followed by the injection of a spacing slug of alkaline halide and then a fresh slug of polymer aqueous solution, the polarity of which is opposite to the polarity of the first polymer slug, and then a slug of aqueous solution of trivalent metal crosslinking agent to effect the partial crosslinking of the polymer charges, the polymer layers being successively added until the injection pressure of the polymer aqueous solutions show that the desired Residual Resistance Factor RRF was attained, and well production may be resumed.

Owner:PETROLEO BRASILEIRO SA PETROBRAS

Disinfection walking vehicle

InactiveCN106377781AAchieve full coverageChemicalsInjection pressureEngineering

The invention provides a disinfection walking vehicle, which comprises a vehicle body, universal wheels and a push rod, wherein a motor box and a water tank are arranged on the vehicle body; a motor is arranged in the motor box; a pressurizer is arranged on the motor box; a driving disc is arranged on the pressurizer; the motor and the pressurizer are in drive connection through a belt; a pressurization pipe is arranged on the pressurizer, penetrates through the water tank and extends to the bottom part of the water tank; the motor box, the water tank and the vehicle body are fixedly connected. An atomization device is arranged on the water tank; a liquid suction pipe is arranged on the lower part of the atomization device, penetrates through the water tank and extends to the bottom part of the water tank; the liquid suction pipe and the atomization device are fixedly connected. A spraying pipe is arranged on the atomization device; each universal wheel is provided with an orientation locking device for enabling the universal wheel to walk in a straight line. The disinfection walking vehicle provided by the invention is simple in structure, convenient to use, movable, labor intensity-saving, and large in injection pressure.

Owner:陶新田

Self-cleaning nozzle

InactiveCN105665157ASpray nozzlesInjection pressureEngineering

The invention relates to a self-cleaning nozzle. The self-cleaning nozzle comprises a nozzle body arranged fixedly. A lower nozzle head capable of moving up and down relative to the nozzle body and an upper nozzle head fixedly connected with the nozzle body are arranged inside the front end of the nozzle body. A space for injecting of fluid is formed between the upper nozzle head and the lower nozzle head. The nozzle body is internally provided with a stop block for preventing the lower nozzle head from moving too fast. The self-cleaning nozzle has the advantages that 1, the nozzle heads are arranged in an up-down mode, mediums pass through the space between the upper nozzle head and the lower nozzle head and are sprayed out, and the injection pressure is formed by adjusting the mediums in the upper nozzle head and the mediums in the lower nozzle head; the stop block for preventing the lower nozzle head from moving too fast is arranged on the self-cleaning nozzle, so that the defect that the lower nozzle head cannot be repositioned due to too fast movement is overcome; and 2, the lower nozzle head can be buffered by arranging a spring when being impacted, and accordingly the situation that the lower nozzle head is damaged due to the fact that the lower nozzle head moves too fast and the impact force is too large is avoided.

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Owner:YANGZHOU YEYUN METALLURGICAL EQUIP FACTORY

3 results about "Injection pressure" patented technology

Process for the reduction of the relative permeability to water in oil-bearing formations

Disinfection walking vehicle

Self-cleaning nozzle

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