SU1585493A1 - Above-bit hydraulic elevator - Google Patents

Abstract

The invention relates to the drilling of wells. The goal is to increase the magnitude of the decrease in hydrodynamic pressure on the face and increase reliability of operation. For this purpose, an elastic cuff 9 is placed in the annular groove 8, which is formed on the peripheral part of the sealing element 3. The cuff 9 has a mechanism for its forced deformation. The cuff 9 is made wear-resistant surface. The hydraulic elevator has a tide 5, made circular in the form of glass 10. The hydraulic elevator also has a nozzle 4 and a diffuser 7, made circular and slotted. The nozzle 4 is formed by the outer surface of the housing 1 and the inner surface of the glass 10. The diffuser 7 is formed by the outer surface of the housing 1 and the surface of the annular segment cut-outs in the element 3, which are divided by vertical fairing ribs into separate channels. The mechanism of forced deformation of the cuff 9 is made of centrifugal in the form of half-rings. The latter are installed in the groove 8 with the ability to interact with the inner surface of the cuff 9 and balls placed in chambers made in vertical obtrusion ribs. The balls are placed in the chambers with the possibility of interaction with the semirings when the housing 1 rotates. During tripping, the hydraulic elevator does not create additional interference, since the flushing fluid flows freely from under the bit into the annulus and vice versa, as well as through nozzles 4. 1 Cp f-ly, 5 ill.

Description

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31585493

The nozzle 4 is formed by the outer surface of the housing 1 and the inner surface of the glass 10. The diffuser 7 is formed by the outer surface of the housing 1 and the surface of the annular segment cut-outs in element 3, which are separated by vertical fairings with separate channels. The mechanism is forced, placed in the chambers, made in the vertical ribs of the fairing. The balls are placed in chambers with the possibility of interacting with half-rings during the rotation of the housing 1. During the tripping, the hydraulic elevator does not create additional fur, because- the washing fluid of the deformation of the cuff 9 is made JQ freely flows from under the chisel into the centrifugal in the form of half rings. The latter are installed in the bore 8 with the ability to interact with the inner surface of the cuff 9 and the shutter space and vice versa, as well as through the nozzles A. 1Cp f-ly, 5 ill.

A ditch placed in chambers made in vertical ridges. The balls are placed in chambers with the ability to interact with the semirings when the housing 1 rotates. During lowering operations, the hydraulic elevator does not create additional fur, because the flushing fluid flows freely from under the bit into the annulus and vice versa, as well as through nozzles A 1 hp f-ly, 5 ill.

This invention relates to hardware used in the drilling of wells.

The purpose of the invention is. an increase in the magnitude of the decrease in hydrodynamic pressure on the bottomhole and an increase in the reliability of the device.

FIG. 1 shows an overhead hydraulic elevator in operation, a longitudinal section; in fig. 2 - section А-А on ig. 1i in FIG. 3 - section BB on the lip. one; in fig. 4 - elastic cuff; in fig. 5 shows the node I in FIG. four.

The overhead hydraulic elevator includes a cylindrical body 1 with an axial channel 2, mounted on the body 1 a sealing element 3 with a wear-resistant external surface and a jet pump, the nozzle 4 of which is made in the tide 5 of the body 1 and connected by a radial channel 6 to the axial channel 2, and the diffuser 7 is placed in the sealing element 3. On the peripheral part of the sealing element 3 there is an annular groove 8 in which the elastic cuff 9 is placed. The tide 5 is annular in the form of a glass with a reinforced surface 10 The pocket surface 11 has a housing 1 in the area of the jet pump.

The nozzle 4 and the diffuser 7 are circular and formed by the nozzle 4 — the outer corner of the housing 1 and the inner surface of the 10 cup; the diffuser 7 — the outer surface 11 of the housing 1 and the surface of the annular segment cut-outs 12 in the sealing element 3 spinner 13 on ot0

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efficient channels. There is a mechanism of forced deformation of the elastic cuff 9, made centrifugal in the form of half-rings 14, installed in the annular groove 8 with the ability to interact with the inner surface of the elastic cuff 9 and balls 15 placed in chambers 16 made in vertical fairing ribs, and the balls 15 are placed in chambers 16 with the possibility of interaction with semirings 14 while rotating the device. On the elastic cuff 9, the wear-resistant outer surface is made in the form of a layer 17 impregnated with grains of corundum or boron carbide. A bit 18 is attached to the lower part of the body 1.

The arrows indicate the direction of movement of the flushing fluid during operation of the device.

The device works as follows.

Part of the flushing fluid from the axial channel 2 of the device enters the bit 18 in the bottomhole zone, and part through the radial channels 6 to the nozzle 4 and further through channels (diffusers) 7 enters the annulus above the device,. the jet pump is in operation, due to its operation the hydrodynamic pressure in the zone of operation of the bit 18 is reduced and, as a result, the drilled rock is removed more quickly from the bottomhole zone to the zone located above the sealing element 3. Maximum

The differential pressure between these zones is maintained by the sealing element 3, its principle of operation is desirable. During rotation of the device (500-800 rpm) due to centrifugal forces, the balls 15 tend to move from the initial position to a larger radius of rotation, while exerting pressure on the half-rings 14, which in turn act on the elastic cuff 9. Last, increasing in diameter, it contacts the well wall and creates a seal between the above and below lying zones. When the device stops, the effect of balls 15 and half-rings U on the cuff 9 disappears and the system of balls 15 - half-rings 14 - elastic cuff 9 occupies the initial position.

During tripping operations, the device does not create additional interference, since the washing fluid can flow freely from under the bit 18 into the annular space and, on the contrary, through the channels inside the bit 18 and the device, and through the nozzles 4 jet pumps.

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Form

la invention

Claims (2)

1. Overhead hydraulic elevator, including a cylindrical body with an axial channel, a sealing element mounted on the case with a wear-resistant external surface and a jet pump, the nozzle of which is made in the tide of the case and connected by radial channels to the axial channel, and the diffuser is placed in the sealing element, different that, in order to increase the value f585493 reducing the hydrodynamic pressure on the bottom and increasing the reliability of the device; it is equipped with an elastic cuff placed in an annular groove made on the peripheral part of the sealing element and a mechanism of forced deformation of the elastic cuff; wear-resistant Q external surface is made on elastic cuff, tide made, annular in the form of glass, the nozzle and the diffuser are made circular slotted and formed: nozzle - outer surface 5 of the body and inner surface of the glass, diffuser - outer surface of the body and the surface of the annular segment cuts in the sealing element, separated by vertical ribs on each channel, while the mechanism of forced deformation of the elastic cuff is made centrifugal in the form of half rings, installed 5 in the annular groove with the possibility of borrowing with the inner surface of the elastic cuff, and balls placed in chambers made in the vertical ribs, Q, and the balls are placed in the chambers with the possibility of interaction with the semirings during the rotation of the body. 2. The hydraulic elevator according to claim 1, wherein the wear-resistant outer surface of the elastic cuff is made in the form of a grain-impregnated corundum or boron carbide layer. "F2 FIG. 2 Fig.d to i FIG A impregnating baths tt