RU20924U1 - PACKER DESTRUCTION DEVICE - Google Patents

Abstract

1. A device for destroying the packer, lowered onto the pipes, comprising a housing, a hollow shaft and a rotary holder with nozzles arranged eccentrically relative to the transverse axis, characterized in that the nozzles are located in different directions relative to the longitudinal axis of the holder. The device according to claim 1, characterized in that it has at least one nozzle directed relative to the longitudinal axis towards the housing, and at least one nozzle directed away from the housing. The device according to claim 1 and 2, characterized in that it has at least one nozzle directed perpendicular to the longitudinal axis of the housing.

Description

 11140 2

MShS (6) Е21В29 / 00 Е21В43 / 114

E21B43 / 12

DEVICE FOR PACKER DESTRUCTION

The device relates to mining, in particular, to the field of equipment for

wells, and can be used to break packers or cut pipes in wells

mainly with a small inner diameter.

For isolation (separation) of the pipe and annular space of the well, as well as

reservoirs and interlayers of the productive horizon of the field use packers.

The problem occurs when removing the packer, if necessary

cement bridge to isolate the waterlogged operating interval

productive formation. When liquidation (drilling, milling) is not

recoverable packer high material costs, because have to destroy from 0.6 to

1,5m in height of a very solid construction.

Known internal hydraulic sandblasting pipe cutter (I.P. Pustovoitenko

"Prevention and methods for eliminating accidents and complications in drilling, M.," Subsoil,

1987, p. 203-205), consisting of a housing with nozzles screwed into the housing, a saddle and

ball.

Prepared for work, the pipe cutter is lowered to the place of work and restored

drilling mud circulation. Then the cutting fluid is pumped into the pipes,

for example water with sand, and ensure its outflow through nozzles. At the same time

rotate the drill string with the machine tool from the surface.

A disadvantage of the known device in the need to rotate the entire pipe string for

distribution of jets flowing from the nozzles around the circle with the aim of education

continuous horizontal gap, which leads to excessive energy consumption and wear

casing string.

Known hydraulic punch ("Temporary instructions for sandblasting

method of perforation and opening, M., VNII, 1967, p. 18-24 and 32-34) containing

case with nozzles, shutter blocking nozzles, in the form of a sleeve fixed

middle elements in the housing, and a rotator mounted above the housing.

A disadvantage of the known device is that during operation, the rotator allows you to make

only complete single rotary rotation of the punch. For repeated rotation

The closest technical solution to the claimed utility model is a sandblasting puncher (a.s.SSSR No. 831947, class E21B43 / 12, publ. 05.25.81), comprising a housing, a shaft with an axial and communicating bypass channel, a rotary cage with nozzles, forming a chamber with the shaft with a cage turning assembly located in it, in which the cams are placed on the rotary cage eccentrically relative to the transverse axis of the perforator, and the cage turning restriction assembly is made in the form of a piston with external and internal carriers, the shaft has an endless groove, cage - a longitudinal, respectively, under the inner and outer carrier.

The disadvantages of the known device is the design complexity due to the availability of means for switching the working fluid flows into the nozzles, equipped with a carrier and bypass channels for rotational and vertical movement of the nozzles, as well as the large length and multidirectionality of the internal channels for the working fluid, which causes increased wear and reduces reliability devices in operation. The punch allows you to perform separate vertically-inclined slots-windows, but can not provide a continuous continuous horizontal slots, which narrows its functionality.

The technical task of the proposed utility model is to expand the functionality of the device while simplifying its design. The stated technical problem is solved due to the fact that in the device for destroying the packer containing the housing, the hollow shaft and the rotary holder with nozzles arranged eccentrically relative to the transverse axis, the nozzles are oppositely directed relative to the longitudinal axis of the holder, with at least one nozzle directed relative to the longitudinal axis towards the housing, and at least one nozzle is directed away from the housing, and at least one nozzle is directed perpendicular to the longitudinal axis of the housing. The multidirectionality relative to the longitudinal axis of the holder ring of the nozzles of the rotary holder of the claimed device ensures the destruction of the packer (in particular its dies) over the entire height without vertical movement of the device body or pipe string. In FIG. 1 shows the inventive device for the destruction of the packer in conjunction with a fragment of the casing string of the well with the packer, section, in FIG. 2 and 3 are sectional variants AA in FIG. 1, in FIG. 4 is a section BB of FIG. 2, in FIG. 5 is a section BB of FIG. 2, in FIG. 6 is a section G-G in FIG. 3, in FIG. 7 is a section DD in FIG. 3 and in FIG. 8 is a section EE in FIG. 3. The device for destroying the packer comprises a housing 1 with a through axial channel, a tapered threaded tip 2 for connection with a tubing string

pipes (not shown in the drawings). In the housing 1, the hollow shaft 3 is concentrically strengthened,

having a flange 4, by means of bearings 5 of seals 6 and clamping nuts 7. On

the end of the shaft 3 by means of a threaded connection secured holder 8 in the form of a glass with

eccentrically arranged relative to the transverse axis of the nozzles 9 in its lateral

surface.

The channels of the nozzles 9 are directed relative to the longitudinal axis or in pairs

opposite (see FIGS. 4 and 5), or independently multidirectional (see FIGS. 6, 7, 8), in

depending on the purpose of the device.

A device for destruction (kera works as follows.

According to the results of geophysical studies of the well (for example, by the locator method

couplings) determine the location of the upper sliding dies 10 of the packer (see Fig. 1).

Then lower the device to destroy the packer and install it with nozzles 9

opposite the dies 10, in the cavity of the nozzle 8 through the tubing is pumped

abrasive fluid (silica sand content 6-15%). Abrasive fluid

destroys (cuts) the body And the packer, then the locking cone 12 and the upper sliding

dies 10 due to the outflow from nozzles 9 with high speed.

The eccentric arrangement of the nozzles 9 relative to the transverse axis of the cage 8 when

the outflow of fluid from it provides rotation of the cage 8 in the bearing 5 around

longitudinal axis.

The location of the nozzle 9 at various angles and inclinations (up and down, or up,

perpendicularly and down to the vertical axis of the device) provide a given

optimally of the order of 35-40 mm, the width (height) of the cutting of the housing 11, cone 12 and dies

10 non-retrievable packers.

If necessary, in the same order can be destroyed and the bottom dice 13

packer.

Simplification of the design of the claimed device in comparison with the prototype

achieved by eliminating elements such as bypass channels for feeding

abrasive fluid in the nozzle, limiter angle of rotation of the holder, drove for

vertical mixing of the clip, which in turn reduced the wear by 2-4 times

device design.

The time required to destroy the packer is reduced from a few hours (about 3-5)

in comparison with the prototype or several days in comparison with mechanical

Claims (3)

1. A device for destroying the packer, lowered on the pipes, comprising a housing, a hollow shaft and a rotary holder with nozzles arranged eccentrically relative to the transverse axis, characterized in that the nozzles are located in different directions relative to the longitudinal axis of the holder.  2. The device according to claim 1, characterized in that it has at least one nozzle directed relative to the longitudinal axis towards the housing, and at least one nozzle directed away from the housing. 3. The device according to claim 1 and 2, characterized in that it has at least one nozzle directed perpendicular to the longitudinal axis of the housing.