RU64265U1 - BOOT FOR INSTALLING A PROFILE INTERIOR BUTTON 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 shutter in the well, including a housing made of easily drilled material, made with the possibility of tight and rigid connection with the shutoff, with a central passage channel, a saddle with a hollow and cylindrical insert equipped with internal longitudinal channels, in which the valve is axially movable above which a limiter is rigidly connected to the housing. The valve is made poppet with a guide at the top and pushed to the seat, and the limiter is equipped with an axial hole made with the possibility of sliding interaction with the valve guide. The proposed shoe for installing a profile overlap is easy to manufacture, reliably closes the central channel when using the overlap in horizontally-deviated or horizontal wells, even with the use of low-capacity pumps. The use of a poppet valve allows for the same pump performance to press it harder to the seat, compared with a ball, due to its larger area. 1 ill. for 1 liter

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 "Shoe for installing a profile overlap in the well" (patent. RU No. 2208125, IPC ЕВВ 29/10, publ. Bull. No. 19 dated 07/10/2003), including a housing with a thread for connection with the overlap and with the central passage a channel, a seat and a ball valve, while the shoe is provided with an insert, the ball valve is placed in a recess made in the body wall and is spring-loaded, and the ball valve seat is made in the form of a sleeve installed in the passage channel of the body coaxially movable relative to its axis, fixed from longitudinal moved latch in the form of a retaining ring placed in an annular groove made in the liner that operates at hydraulic pressure in the passage channel of the housing, the channels being made in the housing wall communicating its central channel and a recess for the ball valve with external space.

The disadvantage of this device is the difficulty in manufacturing and problems when disconnecting the shoe after expanding the overlap.

The closest in technical essence and the achieved result is “A shoe for installing a profile overlap in the well” (patent for metro RU 56454, IPC Е21В 29/10, publ. Bull. No. 25 of 09/10/2006), including the case with central bore, seat and ball valve. On the outer surface of the housing, an annular selection and annular protrusions located above are respectively made for connection to the overlap and for sealing this connection. The central channel above the seat, rigidly connected to the body, is equipped with a hollow cylindrical insert with internal longitudinal channels, inside of which there is a ball valve with the possibility of axial movement. The body is made of easily drilled material.

The drawbacks of both analogues are that after the shutter is lowered, the ball valve in the horizontally-inclined or horizontal wells remains open, and if a low-flow pump is used, the valve may not close, which

leads to the need for delivery and the connection of an additional pump and, consequently, to additional material costs.

The technical task of the utility model is to create a shoe that is simple to assemble with and when disconnected from the shutoff, with a poppet valve that reliably closes the central channel when using the shutoff in horizontally-inclined or horizontal wells, even with small pumps.

The technical problem is solved by a shoe for installing a profile overlap in the well, comprising a body of easily drilled material, made with the possibility of connection with the overlap, with a central passage channel, a seat and a valve.

What is new is that the valve is poppet-shaped with a guide at the top and pushed against the seat, and the limiter is provided with an axial hole made with the possibility of sliding interaction with the valve guide.

The drawing shows the location of the shoe in the lower part of the profile overlap.

A shoe for installing a profile overlap 1 in the well (not shown in the drawing) consists of a body 2 with a central passage channel 3, a seat 4 and a poppet valve 5, pressed against the seat 4 by a spring 6. An annular sample 7 and located on the outer surface of the body above the annular protrusions 8, respectively, for connecting to the overlap 1 and for sealing this connection. The central channel 3 above the seat 4, rigidly connected to the body 2, is equipped with a hollow cylindrical insert 9 with perimeter internal longitudinal channels 10. The poppet valve 5 is equipped with a cylindrical guide 11 inserted into the axial hole 12 of the stopper 13, rigidly connected to the body 2, with the possibility of longitudinal movement.

The device operates as follows. The housing 1 by means of an annular selection 7 by compression is attached from below to the profile overlap 1 and on the drill pipe string (not shown in the drawing) they are lowered into the well 2. Moreover, the annular protrusions 8, “digging” from the inside into the overlap 1, provide reliable sealing of the connection. During the descent, the borehole fluid flowing along the central channel 3 and the longitudinal channels 10 of the cylindrical insert 9, preliminarily pushing up the poppet valve 5 with a spring 6 from the seat 4 to the restrictor 13, fills the internal space of the overlap 1. After reaching the installation area of the overlap 1, it creates excess pressure due to pressure

the poppet valve 5 with a spring 6 to the seat 4, under the action of which the profile corrugations (not shown in Fig.) of the overlap 1 are straightened before being pressed against the walls of the well. In this case, the guide 11, moving longitudinally along the axial hole 12 of the stopper 13 fixed in the housing 2, eliminates the deviation of the poppet valve 5 from the axis of the housing 2. As a result of the fact that the spring 6 acts on the poppet valve 5, it will always interact with the seat 4 , even when installing the shutoff 1 in horizontally deviated and horizontal wells. Next, a flare tool (not shown in the drawing) is lowered into the shutter 1, under the influence of which the shutter 1 is pressed tightly against the well walls. After reaching the shoe with the flare, the walls of the overlap 1 move away from the body 2 and the shoe is easily pushed out of the overlap 1. After that, the flare is removed from the well. If necessary, the housing 2 is easily drilled, as it is made of easily drilled material.

The proposed shoe for installing a profile overlap is easy to manufacture, reliably closes the central channel when using the overlap in horizontally-deviated or horizontal wells, even with the use of low-capacity pumps. The use of a poppet valve allows, with the same pump performance, to press it harder against the seat, compared to a ball valve, due to its larger area.

Claims (1)

A shoe for installing a profile shutter in the well, including a housing made of easily drilled material, made with the possibility of tight and rigid connection with the shutoff, with a central passage channel, a saddle with a hollow and cylindrical insert equipped with internal longitudinal channels, in which the valve is axially movable above which there is a limiter rigidly connected to the housing, characterized in that the valve is poppet with a guide at the top and pushed to the seat, and granichitel provided with an axial hole adapted to slidably interact with the valve guide.