RU173432U1 - DEVICE FOR PERFORATION OF WELLS AND RELATED TECHNOLOGICAL OPERATIONS - Google Patents

Abstract

The utility model relates to the field of drilling and well operation and can be used in the construction and repair of wells for various purposes, including wells designed for oil and gas production. It provides a reduction in time for carrying out a full range of works related to well perforation and related works (milling a wellbore, drilling a well), namely, carrying out a set of works in one round-trip operation. An arrangement for conducting perforation in a well and related technological operations includes a hydro-mechanical perforator mounted on a tubing string and at least one of the following tools: a tool for milling the walls of the well and / or a template, the perforator containing a distribution unit for controlling the flow of working fluid providing the possibility of an adjustable fluid supply to the perforator or under the perforator to the tool located below the perforator and / or to the annular space. 2 s.p. f-ly. 1 ill.

Description

The proposed utility model relates to the field of drilling and operation of wells and can be used in the construction and repair of wells for various purposes, including wells designed for oil and gas production.

Known technologies and devices for the secondary opening of reservoirs by hydromechanical perforation: RU 2249678 C2, IPC 7 Е21В 43/112, 04/10/2005, RU 2371569 С1, IPC Е21В 43/112, 10.27.2009, RU 2365743 С1, IPC Е21В 43/112, 08/27/2009, RU 2490434 C2, IPC Е21В 43/112, 08/20/2013, RU 60132 U1, IPC Е21В 43/114, 10.01.2007, RU 2043486 С1, IPC Е21В 43/114, 09/10/1995, RU 2070959 C1, IPC Е21В 43/11, 12/27/1996

Complex devices are also known that allow simultaneous perforation to carry out some additional technological operations, for example, exposure to a jet pump (RU 92466 U1, IPC ЕВВ 43/25, 03/20/2010, RU 102676 U1, IPC Е21В 43/25, 03/10/2011 .).

The use of integrated devices can achieve significant time savings by reducing the number of tripping operations required for well operations. Thanks to integrated technologies for conducting well operations, several types of technological operations in a well can be carried out at once during one hoisting of a tubing string.

In known arrangements, including a perforator, additional technological operations are performed on the perforator, and equipment for their implementation is located on the tubing string above the perforator.

At the same time, there are cases when it is economically feasible to carry out, together with perforation for one tripping of the tubing, technological operations that require the supply of working fluid under the perforator (below the perforator).

For example, before perforation, as a rule, the wellbore is prepared for the trouble-free passage of technological equipment (perforator) to the perforation interval.

In accordance with the rules for repair work in wells (RD 153-39-023-97, published: Federal Mining and Industrial Supervision of Russia on 05.22.1997, approved by: Ministry of Fuel and Energy of Russia on 08.18.1997) preparatory work for all types of bottom-hole treatment (SCR) of the formation is mandatory and includes in its composition the provision of necessary equipment and tools, as well as the preparation of the wellbore, bottom and filter for processing (paragraph 4.9.1.1.6. Of these rules).

Preparatory work, depending on the condition of the well, may include: development (milling) of the wellbore using a riber (milling cutter), checking the patency of the well using a template (well patterning). The technologies for patterning and milling a wellbore are known in open application, as well as, for example, from patents RU 2386783 C2, IPC Е21В 27/00, publication date 04/20/2010, RU 2274720 С2, IPC Е21В 7/08, Е21В 7/08 April 20, 2006

To prepare the well for subsequent technological operations carried out after perforation, it is also necessary to carry out a number of works, for example, eliminating technological damage and blockages that occur during perforation with a riber (milling cutter) (burrs, chips, residues of insulating materials, etc.) Well Well Template After Perforation.

The riber (a body with cylindrical and conical sections, with teeth on their surface and a through hole for passage of flushing fluid, equipped with a downhole hydraulic motor for its rotation) is intended for milling damaged sections of casing strings during overhaul of wells; it is used, in particular, for restoration patency of deformed casing strings. The template (hollow module of a given shape) is used to check the patency of the production casing, as well as for its cleaning (flushing).

The use of a riber (or other milling tool) is associated with the need to supply working fluid to the downhole motor, which sets it in motion. Application of the template is carried out with the supply of working fluid to the bottom of the tubing and then into the annulus for removal of unwanted contaminants from the well through the annulus.

Thus, the above operations (milling of the wellbore, borehole drilling), carried out immediately before perforation or after perforation, for one reason or another require the supply of working fluid to the lower part of the tubing.

The objective of this utility model is to create an effective integrated device (layout), which allows to reduce the number of tripping operations associated with perforation and associated perforation with technological operations, and it is preferable to perform the previous perforation work, perforation, as well as work in the well after perforation in one tripping operation.

An attempt to partially solve the specified problem can be traced in the application RU 2002102905 A, IPC ЕВВ 43/25, 10.10.2003, the technical solution contained in it, if properly disclosed, could be taken as a prototype. According to published information, this application proposes a "method for processing the bottom-hole zone of the formation, which includes lowering the perforator on the pipe string to the perforation interval, creating pressure in these pipes, cutting a slit by moving the perforator and washing the cavity through the perforation slot, and then returning the perforator to the transport position, characterized in that the subsequent processing of the bottom-hole zone of the formation is carried out by the working agent without raising the perforator by installing a shear circulation valve on it with cut in We have additional flushing windows. ” However, it is not clear from this wording what is meant by “post-treatment”, is this treatment carried out using any technological equipment, is it aimed at cleaning or restoring the patency of the well, or is it just a well-known operation for alluvial cavities in the bottomhole formation zone (PZP) or treatment of the reservoir with caustic compounds (acid treatment).

No other close analogues of the proposed integrated device in the prior art were found, which allows us to conclude that the proposed utility model meets the patentability condition of "novelty."

The technical result achieved by the proposed utility model consists in a significant reduction in the time required to carry out a full range of works related to well perforation and related work (milling a wellbore, drilling a well), namely, carrying out a set of work in one round trip. The use of the device according to the utility model, depending on the technology of its use, allows one or two tripping operations to be excluded from the production cycle. For wells in fields in Western Siberia, for example, the time savings will be about 1-2 days.

The specified technical result is achieved through the use of an integrated layout, including a hydromechanical perforator, containing a distribution unit for controlling the flow of the working fluid, and a tool or a combination of technological equipment for the necessary work in the well (milling the walls of the well, checking the patency of the well) (hereinafter referred to as technological equipment) .

The technological equipment used is selected depending on the condition of a particular well, and alternative layout compositions may be used depending on this.

The layout for perforation in the well and related technological operations according to the utility model includes a hydro-mechanical perforator mounted on a tubing string and at least one of the following tools: a tool for milling the walls of the well and / or a template; wherein the perforator contains a distribution unit for controlling the flow of the working fluid, providing the possibility of an adjustable supply of fluid to the perforator or under the perforator to the tool and / or into the annulus located below the perforator.

The design of the distributor assembly of the perforator may include hydrochannels made in the perforator body and bushings with saddles for a ball mounted sequentially in the upper part of the perforator body along its axis with the possibility of moving and opening and / or overlapping these hydrochannels.

The tool for milling the walls of the well can be made in the form of a riber (milling cutter) with a downhole motor.

As already mentioned, the technological equipment in the composition of the proposed layout is selected depending on the state of a particular well and preferably should be an optimal combination of tools for specific well conditions.

In FIG. 1 shows the proposed device in one of the possible implementations.

The arrangement for conducting perforation in the well and related technological operations includes a hydromechanical perforator 1 and a tool 2 located below the perforator 1 for milling the borehole walls, while the perforator 1 contains a distribution unit 3 for controlling the flow of the working fluid, which makes it possible to regulate the flow of fluid to the milling tool 2 or on the perforator 1. The distribution unit 3 includes hydrochannels 4, made in the housing 5 of the perforator 1 and bushings 6 with saddles 7 under the ball, installed e successively at the top of the punch body 5 along the axis 1 movably and open and / or overlapping the specified waterway 4. The tool 2 for cutting the borehole wall is designed as a reamer (router) with a downhole motor.

The device operates as follows.

An assembly including a hydromechanical perforator 1 containing a distribution unit 3 for controlling the flow of working fluid, and a tool 2 for milling the walls of the well (for example, a riber (milling cutter) with a downhole motor) are lowered into the well at the tubing string.

The working fluid is supplied through the distribution unit 5 of the perforator 1 to the milling tool 2, the borehole is milled, then, by dropping the ball, the sleeve 6 of the distribution unit 3 is moved down, opening the channel 4 for supplying the working fluid to the perforator, the working fluid is fed through the distribution unit to the perforator 1 , perforation is carried out according to the technology used, then, by dropping the second ball, the second sleeve 6 of the distribution unit 3 is moved down, opening the channel 4 for supplying the working fluid the bones to the milling tool 2, feed the working fluid through the distribution unit 3 of the perforator 1 again to the milling tool 2 and re-milling the perforation interval or wellbore after perforation.

The operation of a device equipped with a template is carried out in a similar way, with a difference only in the form of the used technological equipment and in the application of technological operations corresponding to the selected equipment before or after perforation. At the same time, using the distribution unit 3 of the perforator 1 in a similar way, the working fluid is initially supplied under the perforator to the technological equipment or into the annulus for direct washing of the well, then to the perforator for perforation, and then again under the perforator to the technological equipment or into the annulus conducting a direct flushing of the well.

There are possible applications of the device when, for technological reasons, part of the operations (in the direction and supply of the working fluid to the technological equipment (or in the annulus) and for the use of the corresponding technological equipment before or after perforation) are excluded.

At the end of the entire planned range of works, the layout is raised to the surface.

Claims (5)

1. An arrangement for conducting perforation in a well and related technological operations, including a hydromechanical perforator mounted on a tubing string and at least one tool for providing well patency for technological equipment, the perforator comprising a distribution unit for controlling the flow of working fluid, providing the possibility of adjustable fluid supply to the punch or under the punch to the tool located under the punch to ensure Nia terrain. 2. The arrangement according to claim 1, characterized in that the distribution unit includes hydrochannels made in the perforator body and bushings with saddles for a ball mounted sequentially in the upper part of the perforator body along its axis with the possibility of moving and opening and / or closing these hydrochannels . 3. The arrangement according to p. 1 or 2, characterized in that the tool for providing patency of the well is a template. 4. The arrangement according to claim 1 or 2, characterized in that the tool for providing patency of the well is a tool for milling irregularities on the inner surface of the walls of the production string. 5. The arrangement according to claim 4, characterized in that for the tool for milling irregularities on the inner surface of the walls of the production casing is made in the form of a riber with a downhole motor.

Images