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HYDROSTATIC DEVICE FOR BOTTOM-HOLE CLEANING

[Category : - OTHER]
[Viewed 1119 times]

Long-term experience of the use of bottom-hole and electrical submersible pumps shows that one of the factors improving operational performance is correct cleaning and stimulation of bottom-hole formation zone. Efficiency of the field development, flow-rates of producing wells, share of formation energy used for the fluid lifting at the well depend on the bottom-hole zone condition.
It is very important that an energy spent on the overcoming of filtration resistance (flow coefficient) in the bottom-hole zone is small enough when drawing off liquid.

To reduce filtration resistance it is necessary to carry out pulse-jet filtration and pulse-jet stimulation of the bottom-hole zone, to increase permeability, improve communication with the hole, extension of the system of fractures or channels to facilitate inflow and reduce energy losses in this restricted formation zone.
To this end, it is recommended to use hydrostatic pulse-jet device that ensures pulse-jet cleaning and stimulation of formation.

Use of device intended for the pulse-jet cleaning and stimulation of formation has the following advantages:
device is simple and does not require any additional equipment (work is done with the use of hoisting device available at the wellhead);
after the pulse-jet cleaning and stimulation of formation production of oil is immediately restored;
mechanical stability of the bottom-hole formation zone is not violated, caving is prevented;
efficient hydrodynamic communication between the bottom-hole and oil-filled formation;
possibility of drainage of the whole oil-filled layer.

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natig (Azerbaijan)

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