RU2023875C1 - Device for acting on oil bed - Google Patents

Abstract

FIELD: oil producing industry. SUBSTANCE: device comprises concentrically-arranged tubings and outer pipes installed in producing string. It also has two packer units of which the upper one is of the sliding type with rubber sealing members. Lower packer unit has cross coupling and differential funnel with bell mouth in the form of flexible plates installed with a provision for overlapping the space between the producing string and the fluid flow selector switch. The latter has the form of a return valve with a ball-type closing element, a seat with axial channel, a body with radial channels and a plug in the bottom, and a fastening nipple. The latter has radial channels disposed under the seat and the radial channel of the body. EFFECT: higher oil output achieved by continuous repressive-depressive action applied to oil bed. 1 dwg

Description

 The invention relates to the oil and gas industry, in particular to devices for limiting the flow of water from the formation into the well.

 A device is known for separate and joint operation of two and three layers, consisting of two concentrically arranged pipes and a packer, which are lowered to the required depth, the wells are operated separately: the lower horizon - by a deep pump, and the upper - by compressor oil production.

 The disadvantage of this device is the low tightness of the uncoupling elements.

 A known installation (ed. St. N 112621), representing a packer made with a conical landing valve and nozzle with holes, which allows the isolation of individual sections of the well and to pump fluid into the reservoir under pressure.

 The disadvantage of this device is the inability to carry out repressive-depressive effects on the reservoir.

 The closest technical solution to the proposed one is the installation (ed. St. N 632827), containing an inner lifting pipe concentrically located relative to the outer lifting pipe, the inner and outer pipes forming channels for lifting oil, a packer and a fluid flow switch having bushings with radial holes concentrically mounted relative to the outer pipe, pipes for communication pipes with layers.

 The installation allows for the production of oil with a limited water content from each reservoir separately.

 The disadvantage is the impossibility of repressive and depressive effects on the reservoir and the frequency of the formation.

 The aim of the invention is to increase oil production due to the continuous repressive and depressive effects on the reservoir.

 To this end, the device consists of concentrically arranged lifting and outer pipes with channels for lifting the packers and a fluid flow control unit, the upper sliding packer containing rubber rings in the grooves and the lower one having a cross coupling and a differential funnel consisting of two cones inserted into each other the sockets of which are cut into plates and overlap the slots of the inner cone of the elastic plates with the possibility of overlapping grooves, and a ball check valve.

 The sliding packer contains packer rubber rings that deform inside the groove, the outer surface of the rings is tightly pressed against the inner surface of the production string.

 The differential funnel has a bell that deforms inside the production string due to elastic plates.

 The non-return valve allows you to purposefully pump the plugging solution into the reservoir and hold it in the reservoir.

 The inventive device meets the criterion of "novelty."

 Comparison of the proposed solutions with the prototype and other technical solutions did not allow to identify the signs contained in the proposed solution, which makes it possible to conclude that the criterion of "significant differences".

 The drawing shows a General view of the proposed device.

 The device comprises a check valve body 1 with a plug, a mounting nipple 2, a pressure seat 3, a discharge pipe 4, a ball 5 of the valve, a valve body 6, a funnel sub 7, a channel 8, a differential funnel 9, a cross coupling 10, a pipe 11 of the tubing, a sub 12 pipes, outer pipe 13, support rings 14, bushings 15 with radial holes, rubber sealing rings 16, packer sub 17, pipe 18 and sub 19.

 The device operates as follows.

 From the reservoir, fluid enters the annulus of the well and exits to the surface under the action of the pump through the lift pipes. A plugging fluid is supplied through the packer sub 17 to the inner pipe 11 and through channels 8 through a check valve to the flooded formation. There is a limitation of the flow of water into the well.

 There is a limitation of the flow of water into the well.

 The incoming oil is pumped up the channel formed by pipes 11 and 13.

 Repression is created by the flow of washing liquid from top to bottom, and depression is formed from bottom to top by a deep pump.

 The use of the device allows to increase oil production, to establish and limit the water content from the reservoir to the well. The use of the device is possible at all oil fields of the country where hydrocarbons are produced with an admixture of water.

Claims (1)

 DEVICE FOR INFLUENCE ON THE PLASTIC, containing installed in the production casing, concentrically arranged one relative to the other tubing and outer pipe, forming a channel for lifting oil, two packing units and a fluid flow switch, characterized in that, in order to increase the efficiency of the device, the upper packer unit is made of a sliding type with rubber sealing rings, and the lower has a cross coupling and a differential funnel with a bell in the form of elastic plates, setting with the possibility of overlapping the space between the production string and the fluid flow switch, which is made in the form of a check valve with a ball valve, a seat under it with an axial channel, a housing having radial channels and a plug in the lower part, and a mounting nipple placed concentrically in the return housing valve and made with radial channels located under the seat and radial channels of the housing.

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