Jet pumps

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Jet pumps have been widely used since 1980 in wells survey and development practice.

Due to the relative simplicity of design and the controllability of drawdown pressure value they are recommended for a number of technological operations:

  • controlled reduction of bottomhole pressure; 
  • creating specified drawdown pressure while swabbing;
  • repeated exposure on the bottomhole formation zone by applying alternated drawdown mode; 
  • handling of acidizing and acid reaction products disposal;
  • hydrodynamic and geophysical studies;
  • petroleum extraction.

All these production operations could be more effective while applying insert jet pumps.

In one work cycle of well development insert jet pumps allow to make all necessary research, deep drainage and chemical impact on the reservoir.

The proposed technology is implemented as follows.

Jet pump body with packer is dropped to target depth of the well with help of the tubing. The packer is set above the test reservoir. By means of pump units arranged on the surface the working fluid at a predetermined pressure is piped to a jet pump. During jet pump operating hydrostatic pressure may be reduced almost to zero. On completion of the working fluid piping to the jet pump hydrostatic pressure recovers.

Jet pumps make the creation of the predetermined drawdown possible, control its value and duration, reiterate the cycles of depression and repression on the reservoir.

Without further tubing descent and ascent at any stage of work special tool and accessories included in the scope of the equipment to be supplied allow intensifying the process of wells development by chemical injection into the reservoir and reaction product disposal, and controlling by instruments the nature of the hydrodynamic impact on the reservoir.

Moreover, the insert jet pump can be hoisted out from the borehole by means of wireline technique or washovering. In the latter case, insert jet pump is equipped with a special rubber collar.

This technology, as opposed to the compressor method of well development, is absolutely safe.

The success rate of the work carried out with this equipment is equal to 95-100%. As a result of its implementation wells survey and development terms reduce in two and more times, their productivity increases by 30-100% and their well injection capacity - in 1.5-3 times.

Type

Parameters

UEOS-4

  • Intensification of oil production, clean out of the near well-bore zone of the reservoir, pressure build-up and PLT surveys;
  • Setting depth – up to 4 000 m;
  • Casing string inside diameter – not less than 122 mm;
  • Overall dimensions – no more than 118х700 mm.

UEOS-4B

The device is functionally equal to UEOS-4 including:

  • Operation in controlled directional and horizontal wells;
  • The opportunity to use a well tractor for moving geophysical device with the cable;
  • Overall dimensions – no more than 128х600 mm.

UEOS-4M

The device is functionally equal to UEOS-4 including:

  • Operation with coiled tubing up to 1,75’’ (44,45 mm);
  • Overall dimensions – no more than  144х500 mm.

UEOS-5

  • Well development;
  • Oil production;
  • Deep drainage and reservoir cleaning;
  • Setting depth – up to 4 000 m;
  • Overall dimensions – no more than 108х800 mm;

UEOS-5K

The device is functionally equal to UEOS-5 including:

  • The opportunity to operate in casing strings with the diameter not less than 114,3 mm;
  • The device is lowered on tubing-60;
  • Overall dimensions – 80х400 mm;
  • Body’s drift diameter – 38 mm.

UEOS-6

The device is functionally equal to UEOS-5 including:

  • Oil production in wells with heavy expanses of the working fluid and high flowing production rate;
  • Peculiarity – sealing insert with integrated nozzles and mixers;
  • Overall dimensions – 144х500 mm.

The price depends on the set

 

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