RU2661925C1 - Device for installing casing filters in deep perforation channels-waveguides - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention relates to technical means for construction and repair of oil and gas wells, namely to secondary opening of productive beds. Device for installing casing filters in deep perforation channels-waveguides comprises a hollow body with a guide pipe installed therein, a conveying tube, a wedge-deflector and an associated armature. In addition, it is provided with a rotationally-orientated mechanism located between the armature and the wedge-shaped wedge, rigidly connected to the hollow body, an adapter connected to the guide pipe, in the lower part of which radial holes are made connecting it with an annular space formed between the hollow body and the guide tube. In this case, the adapter is connected to a conveying tube in which a separating insert is provided, provided with conical elastic collars, as well as rigid supports cooperating with the cuffs and forming upper and lower annular chambers, hydraulically connected to each other, in the conveying tube, adapter and guide pipe.

EFFECT: technical result consists in increasing the efficiency, reliability and quality of work when installing casing filters in the perforation channels-waveguides.

1 cl, 5 dwg

Description

The invention relates to technical means for the construction and repair of oil and gas wells, and in particular to means for the secondary opening of reservoirs.

A device for installing casing filters in deep perforation channels, waveguides, containing a hollow body with a guide tube installed in it, a transport pipe, a wedge diverter and an anchor associated with it (see N. Shamov, N. Intensification of the processes of construction and repair of oil producing and injection wells based on the theory of nonlinear wave mechanics of multiphase media: abstract of thesis of Doctor of Technical Sciences. M. -2013 - P. 38, 39).

A disadvantage of the known device is that the installation of casing filters is carried out by descent on pipe columns, the use of which requires a significant investment of time. In addition, there may be an inaccurate installation location of casing filters in perforation waveguide channels during their descent, especially when casing several waveguide channels in one well.

The technical result of the invention is to increase the efficiency, reliability and quality of work when installing casing filters in perforation channels, waveguides.

This result is achieved by the fact that the device for installing casing filters in deep perforation channels, waveguides, containing a hollow body with a guide tube installed in it, a transport pipe, a deflector wedge and an associated armature, is equipped with a rotary-orienting mechanism located between the armature and a deflecting wedge rigidly connected to the hollow body, an adapter connected to the guide tube, in the lower part of which there are made radial holes connecting it to the one formed between the floor a housing and a guide tube with an annular space, wherein the adapter is connected to a transport tube in which a separation insert is provided, provided with conical elastic cuffs, as well as rigid supports interacting with the cuffs and forming the upper and lower annular chambers in the transport tube, adapter and guide tube hydraulically connected to each other.

Improving the efficiency of the device is achieved by reducing time and material costs during hoisting operations and ensuring the accuracy of installation of casing filters in perforation channels, waveguides.

The invention is illustrated by drawings.

In FIG. 1 shows a General view of the device;

in FIG. 2 - callout I in FIG. one;

in FIG. 3 - callout II in FIG. one;

in FIG. 4 - callout III in FIG. one;

in FIG. 5 - the moment of separation of the separation insert from the casing filter.

The device (Fig. 1, Fig. 2, Fig. 3) contains a transport pipe 1, a wedge-diverter 2 with a lodgement 3, connected with a rotary-orienting mechanism 4, an anchor 5 and a hollow body 6, in which a guide pipe 7 is installed, forming with an adapter 8 attached to it and an inner shoulder 9 of the hollow body, angular contact sliding bearings. Radial holes 10 are made in the lower part of the guide pipe, connecting it to the annular space formed between the hollow body and the guide pipe 11. The adapter is connected to the transport pipe, in which is connected by a swivel mechanism 12 or a flexible pipe through a disconnecting unit 13 with the head 14 of the casing filter 15 dividing insert 16 with conical elastic cuffs and cuff supports. Moreover, the upper cuff 17 with the support 18 is directed downward by a conical bell, and the middle cuff 19 with the support 20 and the lower cuff 21 with the support 22 are the upward bell, which form the upper 23 and lower 24 annular chambers in the transport pipe, adapter or guide tube. These chambers are connected to each other by radial holes 26 made in the housing 25 of the separation insert and the central channel 27. A shear or deformable element 28, for example, an elastic ring or a pin, is installed in the disconnecting unit. The swivel-orienting mechanism 4 consists of a cylindrical hollow body 29, on the inner surface of which a multi-strand zigzag groove 30 is made, with which a guide pin 31 mounted on the armature rod 32 interacts (Fig. 1, Fig. 4). Before the device is lowered into the well to push the casing filter through the inlet 33 of the perforation channel-waveguide 34, a column of process pipes, for example, tubing, is attached to the transport pipe.

A device for installing casing filters works as follows.

During the descent on technological pipes, the arrangement of the device as a part of the transport pipe 1, the wedge-diverter 2, the rotary-orienting mechanism 4, the anchor 5, the hollow body 6 with the guide pipe 7 and the adapter 8 is carried out landing of the anchor in the well so that the direction of the wedge box 3 deflector coincided with the input 33 of the perforation channel waveguide 34.

Then, by pumping the working fluid, the assembly is lowered as a part of the separation insert 16 connected by the disconnecting unit 13 to the casing filter head 14 through the previously lowered assembly. Under the pressure of the working fluid on the middle cuff 19 and the support 20, the lower cuff 21 and the support 22, the casing filter is pushed through the bed of the deflecting wedge and the inlet 33 of the perforation waveguide 34, up to the connection (Fig. 2) of the lower annular chamber 24 through the radial holes 10 with an annular space 11 through which the flow of the working fluid flows into the borehole space. The pressure (pressure) of the fluid injection drops significantly. The pushing force of the separation insert becomes significantly less than the pushing resistance of the casing filter, which is locked in the intended position in the waveguide channel. The pressure drop in the discharge system is a signal confirming the end of the filter installation process.

To disconnect and return to the wellhead a dividing insert with a hinge mechanism or a flexible pipe, reverse circulation of the working fluid is created by pumping it through the borehole space (Fig. 5), device and process pipes. Due to the influence of the pressure of the upward flow of the working fluid on the upper cuff 18 and the support 19 of the separation insert, the element 29 of the disconnecting unit 14 with the head 15 of the casing filter 16 will be destroyed or elastic deformation. The separation insert with the hinge mechanism 13 or a flexible pipe is carried out through the process pipes by the working fluid flow the wellhead and with the help of a collet trap is removed from the well (not illustrated by drawings).

To install the casing filter in the next perforation channel-waveguide, the column of technological pipes lifts the remaining arrangement to the height I of movement along the multi-walled zigzag groove 30 of the guide pin 31 (Fig. 4). In this case, the hollow body 6 with the wedge-deflector 2 will move by half the angle of rotation between adjacent perforation channels, waveguides, interacting along the angular contact sliding bearings formed by non-rotating guide tube 7 with adapter 8 and the transport pipe 1 rotating. During the descent, the hollow body with the wedge-deflector will be twisted another half of the specified angle, as a result of which the direction of the lodgement 3 of the wedge-deflector will coincide with the direction of the entrance of the next perforation channel-waveguide to be installed casing filter.

The use of a dividing insert and a rotary-orienting mechanism in the device reduces time, reduces material costs, improves the accuracy of installing casing filters in several perforation waveguide channels for one descent of the device into the well on a string of process pipes as part of a transport pipe, a hollow body with a guide pipe, adapter, wedge diverter, rotary-orienting mechanism and anchors.

Claims (1)

A device for installing casing filters in deep perforation waveguide channels, comprising a hollow body with a guide tube installed therein, a transport pipe, a deflector wedge and an associated anchor, characterized in that it is provided with a swivel-orienting mechanism located between the armature and the wedge a deflector rigidly connected to the hollow body, an adapter connected to the guide tube, in the lower part of which there are made radial holes connecting it to the hollow body formed between with a guide tube in an annular space, wherein the adapter is connected to a transport pipe in which a separation insert is installed, provided with conical elastic cuffs, as well as rigid supports interacting with the cuffs and forming in the transport pipe, adapter and guide tube the upper and lower annular chambers, hydraulically connected together.

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