SU1388549A1 - Arrangement for acting upon bottom hole zone of well - Google Patents

Abstract

The invention relates to the field of oil and gas industry and improves the reliability of the device while simplifying the design. The device includes installed on the tubing (tubing) 1 communication mechanism under the influence of the pressure of the reservoir fluid (mud) of the bottomhole zone (PZ) 2 of the reservoir 3 with the cavity 4 above it and the node overlapping the internal cavity of the tubing 1. The specified communication mechanism is designed as with the ability to interact when packing the packer 5 and the perforated shank 6, and the overlap node of the tubing 1 is made in the form of a stopper placed on the shear pin in the tubing 1 between the packer 5 and the shank 6. When the packer is packaged 5 tviem RV pressure occurs below the packer 5; its rapid flow from the PZ 2 to the cavity 4. The pressure in the PZ 2 drops and the packer 5 re-sits. As the pancreas enters the PZ 2, the pressure on the packer from below increases again and the cycle repeats. 2 Il. with (L

Description

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The invention relates to the oil and gas industry, in particular, to devices for initiating a well and affecting its near-bottom zone.

The purpose of the invention is to increase the reliability of the device while at the same time simplifying the design.

Fig, 1 shows the device, a general view; Fig, 2 - node I in Fig, 1, the overlap of the internal strip of tubing (tubing),

The device for influencing the well bottom zone contains a mechanism for communicating on the tubing 1 under the pressure of the reservoir fluid of the bottomhole zone 2 of the reservoir 3 with the cavity 4 above the device, which is made in the form of a packer 5 and a perforated shank 6, and the blocking unit in the form of a tube 8, placed in the inner cavity

rapid flow of fluid from the bottomhole zone 2 of formation 3 in cavity 4 above the device with pressure drop in the bottomhole zone and re-planting of the packer 5, With the flow of plate liquid into the bottomhole zone, the pressure acting on the packer 5 decreases again and the cycle of Q effects repeats is. The liquid that accumulates in the wellbore above the bag is removed by the compressor. To transfer water to the well in operation, tubing 1 creates excessive pressure

15 to cut the pin 9, while the plug 8 falls into the perforated shank 6 and releases the internal cavity 7 of the tubing 1,

Claims (1)

20 claims A device for influencing the well bottom zone, including the shear pin 9 installed on the pumping pin, the tubing mechanism has 25 spring pipes the washing holes 10 are also not present. The device operates as follows, i After the device is lowered into the well 11 and the liner 6 stops on the bottom part of the weight of the tubing 1 is discharged onto the packer 5. Using a compressor (not shown) through the flushing holes 10 reduces the level of fluid in the wellbore. Then the device starts to work automatically under the action of the pressure of the reservoir fluid. As soon as the value of the specified pressure acting on the packer 5 from below exceeds the force acting on the packer from above, which is equal to the sum of the weight of the liquid column in the wellbore above the packer and the amount of unloading of the tubing weight to the packer, the packer is unpacked. When this happens rapid flow of fluid from the bottomhole zone 2 of the reservoir 3 in the cavity 4 above the device with pressure drop in the bottomhole zone and repositioning of the packer 5. As the reservoir fluid enters the bottomhole zone, the pressure acting on the packer 5 from the bottom increases again and the cycle of action repeats. The liquid accumulating in the wellbore above the bag is removed by the compressor. To put a well into operation, tubing 1 is pressurized to expel pressure from the pin 9, while plug 8 drops into the perforated shank 6 and releases the internal cavity 7 of tubing 1, Invention Formula A device for influencing the well bottom zone, including those installed on the pumping unit five 0 under the pressure of the reservoir fluid of the near-hole zone of the reservoir with a cavity above it and the overlap unit of the internal cavity of the tubing,: in order to improve the reliability of the device while simplifying the design, the communication mechanism under the influence of the pressure of the reservoir fluid the zone of the reservoir with a cavity above it is made in the form of a packer and perforated silt installed with the possibility of interaction when packing; of tubing - a plug placed on the shear pin in the inner cavity between the tubing and packer perforated liner.