Method of water well regeneration

FIELD: mining.

SUBSTANCE: sealing of well with pneumatic plug at static level depth after which the mechanical colmatant is destroyed by pumping the water well. Subsequent washing of the well sump is carried out with an ejector pump, which is a hydroelevator with a washing device. The washing flow corresponds to designed well flow rate. After the pneumatic plug is installed, carbon monoxide CO gas is fed into the wellbore. The gas is supplied at the level of the well sump.

EFFECT: reduction of water de-oxygenation duration in the wellbore and the near-filter wellbore.

1 dwg

 



 

Same patents:

FIELD: means to operate underground water intakes, vertical drainage flood-control means, underground water replenishing systems, which replenish water reserves via closed infiltration systems, particularly to regenerate mechanically and biologically mudded water wells.

SUBSTANCE: method involves sealing well at static level depth with the use of pneumatic cap; holding the well as it is for 3-6 months; breaking mechanical mud plug by water well washing; flushing well sump with ejector pump. The ejector pump is hydraulic elevator with washing-out device. Flushing flow rate corresponds to estimated well rate.

EFFECT: decreased material consumption and increased ecological safety.

FIELD: oil and gas industry, particularly means to provide optimal filtration mode in wells characterized by sand sloughing in the product.

SUBSTANCE: method involves extracting product of filterless well through perforated area and controlling sand content in product when well production rate declines. When sand particles with angular shape appear in the product during designed recovery of well production rate by increasing depression drawdown inside well secondary well perforation is carried out in zone containing no clay interlayers. The secondary well perforation is performed with shot density of not less than 70% of the primary one and with channel cross-section 1.15 - 5 times greater than that of the primary one. Perforation channel length is 15% greater than range of stress in active filtration zone of productive bed rock under maximal pressure drop.

EFFECT: increased efficiency due to method simplicity, reduced time and material consumption along with maintaining operational characteristics and well operational safety.

5 cl

The invention relates to the construction, repair and operation of water intakes, groundwater and can be used for water supply and in the fields of oil and gas industry

The invention relates to a device for cleaning filters, drainage and water wells from the mineral deposits using spark discharges

FIELD: oil and gas industry, particularly means to provide optimal filtration mode in wells characterized by sand sloughing in the product.

SUBSTANCE: method involves extracting product of filterless well through perforated area and controlling sand content in product when well production rate declines. When sand particles with angular shape appear in the product during designed recovery of well production rate by increasing depression drawdown inside well secondary well perforation is carried out in zone containing no clay interlayers. The secondary well perforation is performed with shot density of not less than 70% of the primary one and with channel cross-section 1.15 - 5 times greater than that of the primary one. Perforation channel length is 15% greater than range of stress in active filtration zone of productive bed rock under maximal pressure drop.

EFFECT: increased efficiency due to method simplicity, reduced time and material consumption along with maintaining operational characteristics and well operational safety.

5 cl

FIELD: means to operate underground water intakes, vertical drainage flood-control means, underground water replenishing systems, which replenish water reserves via closed infiltration systems, particularly to regenerate mechanically and biologically mudded water wells.

SUBSTANCE: method involves sealing well at static level depth with the use of pneumatic cap; holding the well as it is for 3-6 months; breaking mechanical mud plug by water well washing; flushing well sump with ejector pump. The ejector pump is hydraulic elevator with washing-out device. Flushing flow rate corresponds to estimated well rate.

EFFECT: decreased material consumption and increased ecological safety.

FIELD: mining.

SUBSTANCE: sealing of well with pneumatic plug at static level depth after which the mechanical colmatant is destroyed by pumping the water well. Subsequent washing of the well sump is carried out with an ejector pump, which is a hydroelevator with a washing device. The washing flow corresponds to designed well flow rate. After the pneumatic plug is installed, carbon monoxide CO gas is fed into the wellbore. The gas is supplied at the level of the well sump.

EFFECT: reduction of water de-oxygenation duration in the wellbore and the near-filter wellbore.

1 dwg

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