RU65947U1 - DEVICE FOR DELIVERY OF BULK MATERIALS TO A WELL - Google Patents

Abstract

The proposal relates to the oil and gas industry and can be used to intensify production by delivering materials to the formation, as well as when drilling or repairing wells to disconnect or temporarily shut off the formations when they are backfilled with these materials, for example, during hydraulic fracturing. A device for delivering bulk materials into a well comprises a bailer, a removable cover located at the bottom of the bailer, and connected to it by a shear element and a flexible connection. The removable cover is equipped with a sealing element. The outer surface of the baffle is equipped with rigid centralizers, and above the self-sealing cuff, which passes from the bottom up. From above, a tip is screwed into the choke, in which through holes are made, and a cuff is installed above the bulk material inside the choke. The proposed device for the delivery of bulk materials allows you to empty the bulk material delivered to the well in any interval, in addition, the device eliminates the possibility of emergencies in the well associated with the drilling of device parts in the well. 1 ill. for 1 liter

Description

The proposal relates to the oil and gas industry and can be used to intensify production by delivering materials to the formation, as well as when drilling or repairing wells to disconnect or temporarily shut off the formations when they are backfilled with these materials, for example, during hydraulic fracturing.

A device for delivering mixture components to a well is known (copyright certificate No. 1165767, IPC 7 ЕВВ 33/132, published in bulletin No. 25 of 07/07/1985), containing a housing, a container for the main component, a container for the accelerator placed in it setting and closure, a drain pipe for the setting accelerator with a cotter pin inserted into it, a container for the main component of the mixture, which is placed under the container for the setting accelerator and made with a side hinged lid on the hinges, while the shutter is made with an earring under the cotter pina locking outer collar under the side hinged lid, while the side hinged lid is spring-loaded relative to the fixed wall of the container for the main component.

The disadvantages of this design are:

- firstly, the complexity of the design in the work requiring a certain sequence of operation of nodes and parts depending on each other.

- secondly, the complexity of manufacturing, due to the large number of technically complex parts, which leads to an increase in the cost of the structure as a whole.

The closest in technical essence and the achieved result to the proposed one is a device for the delivery of bulk materials into the well (RF patent for utility model No. 43300, IPC 7 ЕВВ 27/02, published in bulletin No. 1 dated January 10, 2005), containing a choke with a removable lid located in the bottom of the choke, while the lid is fixed by balls located in its nests, held by the inner surface of the movable sleeve, which has balls in the lower part for the balls to enter them when the sleeve is forced to move to remove free sheysya cover, wherein the cover is fixed to the hub by a flexible coupling, the outer surface is provided with a rigid centralizers bailer and into the interior of bailer after filling it with bulk material set collar, wherein the lid is equipped with a sealing member, and the top is screwed on the tip Bailer, wherein

through holes are made through which the internal space of the baffle above the cuff is filled with borehole fluid during the descent of the device into the borehole, in addition, the borehole fluid creates additional pressure on the cuff in the process of emptying the borehole.

The disadvantages of this device are:

firstly, the device is triggered only when the movable sleeve stops in the bottom or previously delivered bulk material and does not allow to empty the delivered material in any interval of the well;

secondly, when removing the device from the well, there is a high probability of the balls falling into the well, and therefore there is a need to remove the balls, and this leads to emergency operations and, consequently, to additional costs.

The technical task of the utility model is the possibility of emptying the bulk material delivered to the well in any of its intervals, as well as eliminating the possibility of emergency work in the well.

The technical problem is solved by the proposed device for the delivery of bulk materials into the well, containing a bobbin, a removable lid with a flexible connection, located in the bottom of the bobbin, a cuff installed inside the bobbin, a tip with through holes screwed on top of the bobbin, rigid centralizers, a sealing element.

What is new is that on the outer surface of the choke, above the rigid centralizers, a self-sealing cuff is installed, which passes from bottom to top, while the lid is connected to the chipper by a shear element and a flexible connection.

The figure shows the proposed device for the delivery of bulk materials into the well in longitudinal section.

A device for delivering bulk materials into the well comprises a bailer 1 (see Fig.), A removable cover 2 located at the bottom of the bailer 1 and connected to it by a shear element 3 and a flexible connection 4. The removable cover 2 is equipped with a sealing element 5. Outer surface flap 1 is equipped with rigid centralizers 6, and above the self-sealing cuff 7, passing from bottom to top. A tip 8 is screwed into the flap 1 from above, in which through holes 9 are made, and a cuff 11 is installed above the bulk material 10 inside the flap 1.

The device operates as follows.

At the wellhead (not shown in FIG.), A sealing element 5 is installed on the removable cover 2 (see FIG.), And then by means of a shear element 3, a removable cover 2 is installed in the bottom of the flap 1. The bulk material 10 is poured

(for example, a loose chemical reagent) in the chipper 1, and then on the bulk material 10, a cuff 11 is installed inside the choke 1, after which the tip 8 is screwed on top of the chipper 1.

Next, the device is connected to the geophysical cable 12 and lowered into the well at the required interval for emptying the bulk material 10. In the process of lowering the device into the well, it is centered using rigid centralizers 6, and the borehole fluid below it is transferred from bottom to top into the borehole above the device due to self-sealing cuff 7, passing from the bottom up, after which the borehole fluid through the through holes 9 of the tip 8 enters the inner space 13 of the baffle 1, creating additional pressure on the particulate material 10, the particulate material 10 remains dry, thanks to the cuff 11.

Next, the wellhead is tied to a pump unit (not shown in Fig.) And the well is filled with process fluid, then the geophysical cable 12 is sealed at the wellhead and a certain overpressure is created in the well above the self-sealing collar 8, for example, 3.0-4.0 MPa, which presses the self-sealing cuff 7 against the borehole walls, while overpressure is transmitted through the openings 9 of the tip 8 to the inside of the baffle 1, and by means of the cuff 11 and bulk material 10 presses on top of the removable cover 4, while the limited moment is destroyed by the shear element 3, and the removable cover 2 falls out only from the bottom of the choke 1 and due to the flexible connection 4 does not fall into the well.

In the inner space 13 of the choke 1, the excess pressure of the borehole fluid generated by the pump unit is transferred to the cuff 11, which displaces the bulk material 10 from the choke 1, since the lower end of the choke 1 is open, while the borehole fluid replaces the bulk material 10. Further, without relieving pressure in the well, the device is slowly raised up to the expected upper level of bulk material 10 in the well, depending on its volume in the chute.

After reaching the expected upper level of bulk material 10 in the well, the pressure in the well above the self-sealing cuff 7 is reset to zero. After that, the geophysical cable 12 is depressurized at the wellhead, and the device is completely removed to the surface.

The proposed device for the delivery of bulk materials allows you to empty the bulk material delivered to the well in any interval, in addition, the device eliminates the possibility of emergencies in the well associated with the drilling of device parts in the well.

Claims (1)

A device for delivering bulk materials into a well containing a bailer, a removable cover with a flexible connection, located in the bottom of the bailer, a cuff installed inside the bailer, a tip with through holes screwed on top of the bailer, rigid centralizers, a sealing element, characterized in that On the outer surface of the choke, a self-sealing cuff is installed above the rigid centralizers, which allows it to pass from the bottom to the top, while the lid is connected by a shear element and a flexible connection to the choke.