RU54391U1 - BOOT FOR INSTALLING A PROFILE OVERLAP IN A WELL - Google Patents

Abstract

The proposal relates to the oil and gas industry, in particular to the field of well drilling, in particular to devices for installing profile shutoffs when they isolate zones of drilling complications. A shoe for installing a profile shutoff in a well includes a threaded housing for connection with a shutoff and with a central passage channel muffled from the bottom and equipped with radial channels, a seat and a ball valve. The ball valve is located in the central channel above the seat, which is rigidly connected to the body. Above the seat in the housing is a sleeve with an axial bore, rigidly connected to the housing. The ball valve is equipped with a cylindrical guide inserted into the axial hole of the sleeve with the possibility of longitudinal movement. The proposed shoe for installing a profile overlap is simple to manufacture, reliably closes the central channel when using the overlap in horizontal-deviated or horizontal wells, and also increases the service life of the flare, eliminating the ingress of a large number of borehole solid particles into the overlap.

Description

The proposal relates to the oil and gas industry, in particular to the field of well drilling, in particular to devices for installing profile shutoffs when they isolate zones of drilling complications.

A device is known that contains a shoe for installing a profile overlap (shutoff) in the well (a.s. SU No. 1712581, IPC E 21 V 29/10, 33/13, publ. Bull. No. 6 of 02.15.1992), including threaded housing for connection to the overlap and to the central passage channel provided with a thread at the top, a seat and a ball valve.

The closest in technical essence and the achieved result is “A shoe for installing a profile shutoff in the well” (patent RU No. 2208125, IPC E 21 B 29/10, publ. Bull. No. 19 dated 07/10/2003), including a housing with a thread for connecting to the overlap and with the central passage channel, a seat and a ball valve, the shoe provided with an insert, the ball valve placed in a recess made in the housing wall, and spring-loaded, and the ball valve seat made in the form of a sleeve mounted in the passage channel of the housing coaxially movable relative to its axis, fixed from longitudinal displacements by a retainer in the form of a retaining ring, placed in an annular groove made in an insert acting at hydraulic pressure in the passage channel of the housing, and in the housing wall there are channels communicating its central channel and a recess for the ball valve with an external space.

The disadvantage of this device is the difficulty in manufacturing.

The disadvantages of both analogues are the impossibility of blocking the central channel with a ball valve when using the shutoff in horizontally-inclined or horizontal wells, as well as the ingress of a large amount of solid particles into the cutter, which significantly reduces the service life of the expander expanding the shutoff.

The technical task of the utility model is to create a reliable shoe with a ball valve that reliably blocks the central channel when using the shutoff in horizontally-deviated or horizontal wells, as well as eliminating

the ingress of a large number of borehole solid particles inside the shutoff to increase the life of the flare.

The technical problem is solved by a shoe for installing a profile shutoff in the well, including a threaded housing for connection to the shutoff and the central passage channel, a seat and a ball valve.

What is new is that the ball valve is located in the central channel above the seat, which is rigidly connected to the body, and the central channel of the body is equipped with radial channels below the seat, below which it is plugged, while above the seat in the body there is a sleeve with an axial hole, rigidly connected to housing, and the ball valve is equipped with a cylindrical guide inserted into the axial hole of the sleeve with the possibility of longitudinal movement.

The drawing shows the location of the shoe as part of the profile overlap when installing the latter in the well.

The shoe for installing the profile shutoff 1 in the well 2 includes a threaded body 3 for connecting to the shutoff 1 and the central passage 5, a seat 6 and a ball valve 7. The ball valve 7 is located in the central channel 5 above the seat 6, which is rigidly connected to 3. The central channel 5 of the housing 3 is equipped below the saddle 6 with radial channels 8. Below the radial channels 8, the central channel 5 is blocked by a plug 9. Above the saddle 6 in the housing 3 there is a sleeve 10 with an axial hole 11 connected rigidly by jumpers 12 to the housing 3. Sharo the howl valve 7 is equipped with a cylindrical guide 13 inserted into the axial hole 11 of the sleeve 10 with the possibility of longitudinal movement.

The device operates as follows.

The housing 3 with the help of thread 4 is attached to the profile overlap 1 and on the drill pipe string (not shown in the drawing) they are lowered into the well 2. At the same time, the well fluid flowing through the radial channels 8, the central channel 5 and squeezing the ball valve 7 from the seat 6, fills the internal space of the overlap 1. Due to the fact that the central channel 5 is blocked from below by a plug 9 and communicates with the borehole fluid using radial channels 8, the amount of particulate matter, especially large ones, is significantly reduced fluid in the well, since it does not enter the shutter 1 directly. After reaching the installation zone of the shutoff 1, excessive pressure is created in it by pressing the ball valve 7 against the seat 6, under the action of which the profile corrugations (not shown) of the shutoff 1 are straightened before being pressed against the walls of the well 2. In this case, the guide 13 moving longitudinally along axial hole 11 of the sleeve 10, mounted

in the housing 3 by jumpers 12, eliminates the deviation of the ball valve 7 from the axis of the housing 3. As a result, the ball valve 7 will always interact with the seat 6 when creating overpressure from above, even when installing the shutoff 1 in horizontally-inclined and horizontal wells 2. Next to the shutter 1, the flare is lowered (not shown in the diagram), under the influence of which the overlap 1 is pressed tightly against the walls of the well 2. After reaching the shoe, the flare is removed from the well 1.

The proposed shoe for installing a profile overlap is simple to manufacture, reliably closes the central channel when using the overlap in horizontal-deviated or horizontal wells, and also increases the service life of the flare, eliminating the ingress of a large number of borehole solid particles into the overlap.

Claims (1)

A shoe for installing a profile shutter in the well, including a threaded housing for connecting to the shutoff and the central passage channel, a seat and a ball valve, characterized in that the ball valve is located in the central channel above the seat, which is rigidly connected to the body, and the central channel of the body equipped with radial channels below the seat, below which it is plugged, while above the seat in the body there is a sleeve with an axial bore, rigidly connected to the body, and the ball valve is equipped with a cylindrical pressure vlyayuschey inserted into the axial hole of the sleeve to move longitudinally.