RU64679U1 - BOOT FOR INSTALLING A PROFILE INTERIOR BUTTON IN A WELL - Google Patents

Abstract

The proposal relates to the drilling and repair of wells, in particular, to devices for installing profile shutoffs when they isolate zones of complications when drilling wells and repairing production casing.

A shoe for installing a profile shutoff in a well consists of a body, which is a pipe muffled from below, rigidly connected, for example, by welding from above to a profile shutoff.

The housing is provided with passage channels made in the form of radial channels of the housing and a saddle in the form of an external cylindrical groove of the housing, on which a cylindrical sleeve is placed, made with the possibility of limited axial movement and tight sealing by means of sealing elements of the radial channels of the housing when moving the cylindrical sleeve down.

The cylindrical sleeve is equipped externally with spring centralizers, made with the possibility of interaction with the walls of the well.

The proposed shoe for installing the profile blocker in the well has a simple design, in addition, the constructive design of the cylindrical sleeve with spring centralizers from the outside interacting with the stacks of the well allows for control of the opening and closing of the radial channels of the casing, while the shoe provides the required tightness regardless of inside the sludge shoe. All this in general increases the reliability of its work.

1 ill. for 1 liter

Description

The proposal relates to the drilling and repair of wells, in particular, to devices for installing profile shutoffs when they isolate zones of complications when drilling wells and repairing production casing.

It is known "Device for blocking the complication zone in the well" (copyright certificate No. 1712581, IPC 7 Е21В 29/10, 33/13, publ. Bull. No. 6 dated 02.15.92), including a profile pipe with cylindrical sections at the ends, on the lower of which there is a shoe with a non-return valve, and on the top - an expander with an anchor element, rigidly connected to the mandrel head located above the profile pipe and having a connection unit for drill pipes, while on the cylindrical sections of the profile pipe there are outer annular grooves for sealing e elements and internal annular protrusions corresponding to the grooves, wherein the anchor element is made in the form of an external protrusion on the expander, and the cylindrical section of the profile pipe under the inner ring protrusion has an annular groove for accommodating the expander protrusion in the initial position, while the profile pipe is made sectional with O-rings, placed in the inner annular grooves of the external thread between the lateral mating surfaces of the sections.

The closest in technical essence and the achieved result is "A shoe for installing a profile overlap in the well" (RF patent for utility model No. 56454, IPC 7 ЕВВ 29/10, publ. Bull. No. 25 from 09/10/2006), including a housing made with the possibility of connecting to the overlap, with a central passage channel, a seat and a ball valve, while on the outer surface of the housing there is an annular selection and the annular projections located above for connecting to the overlap and for sealing this connection, and trawling channel above the seat, is rigidly connected with the housing, the hollow cylindrical insert is equipped with internal longitudinal channels inside which is axially displaceable is located a ball valve, the housing may be made of legkorazburivaemogo material.

Both analog and prototype have common disadvantages:

firstly, the complexity of the design, due to the large number of nodes and parts;

secondly, the low reliability of the shoe in operation, since when installing the overlap, the slurry falling from above can fill the ball valve seat and prevent it from completely closing, which can make it difficult to create the necessary pressure to expand the overlap.

The technical task of the proposed shoe is to simplify its design and increase the reliability due to design solutions that exclude unauthorized fluid flows during the operation of the device.

The technical problem is solved by a shoe for installing a profile overlap in the well, including a housing made with the possibility of connection with the overlap, with passage channels, a saddle with a cylindrical sleeve.

What is new is that the cylindrical sleeve is equipped externally with spring centralizers configured to interact with the walls of the well, and the passage channels are made in the form of radial channels of the body, while the saddle is made in the form of an external cylindrical groove of the body on which the cylindrical sleeve is made, with the possibility of limited axial movement and tight overlap of the radial channels when moving down.

The figure shows a shoe mounted in a profile overlap.

A shoe for installing a profile cutter in the well consists of a housing 1, which is a pipe muffled from below, rigidly connected, for example, by welding from above to the profile cutoff 2.

The housing 1 is provided with passage channels made in the form of radial channels 3 of the housing 1 and a saddle in the form of an external cylindrical groove 4 of the housing 1, on which a cylindrical sleeve 5 is placed, made with the possibility of limited axial movement and tight sealing by means of sealing elements 6 of the radial channels 3 of the housing 1 when moving the cylindrical sleeve 5 down.

The cylindrical sleeve 5 is equipped externally with spring centralizers 7 configured to interact with the walls of the well (not shown in FIG.).

A shoe for installing a profile cutter in the well works as follows.

The shoe is connected to the profile overlap 2, which is then lowered into the well on the drill pipe string (not shown in Fig.), While the shoe is lowered due to spring centralizers 7 installed externally on the cylindrical sleeve 5 and interacting with the borehole walls, radial channels 3 the housing 1 is open, since the cylindrical sleeve 5 is located in the upper part of the outer

cylindrical grooves 4. As a result, the internal cavity of the profile overlap 2 through the radial channels 3 of the housing 1 is filled with borehole fluid.

After the shoe reaches the zone of complication, that is, the installation interval of the profile cutter, the drill pipe string, rigidly connected to the cutter 2 and the shoe body 1, is lifted upward, while thanks to spring centralizers 7 interacting with the walls of the well, the cylindrical sleeve 5 moves down the outer cylindrical grooves 4 of the housing 1 and hermetically by means of sealing elements 6 overlaps the radial channels 3 of the housing 1.

After that, inside the profile overlap 2 using a mud pump create a working hydraulic pressure, under the action of which the walls of the overlap 2 are pressed against the walls of the well. The sludge falling from above into the shoe during operation does not affect the movement of the cylindrical sleeve 5 relative to the outer cylindrical groove 4 of the housing 1, and accordingly the tightness between them, which allows you to create the necessary hydraulic pressure to expand the overlap.

Next, the profile overlap 2 is rolled up to a more tight pressing with the help of installation equipment, for example, a flare tool (not shown). Further, if necessary, drill the lower end of the housing 1.

The proposed shoe for installing the profile blocker in the well has a simple design, in addition, the constructive design of the cylindrical sleeve with spring centralizers from the outside interacting with the stacks of the well allows for control of the opening and closing of the radial channels of the casing, while the shoe provides the required tightness regardless of inside the sludge shoe. All this in general increases the reliability of its work.

Claims (1)

A shoe for installing a profile shutter in the well, including a housing configured to connect with the shutoff, with passage channels, a saddle with a cylindrical sleeve, characterized in that the cylindrical sleeve is equipped externally with spring centralizers configured to interact with the walls of the well, and the passage channels are made in the form of radial channels of the housing, while the saddle is made in the form of an external cylindrical groove of the housing, on which is placed a cylindrical sleeve made with zmozhnostyu limited axial movement and sealingly overlapping radial channels when moving downward.