SU1760101A1 - Multiple-cycle circulation valve - Google Patents

Multiple-cycle circulation valve Download PDF

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Publication number
SU1760101A1
SU1760101A1 SU894770336A SU4770336A SU1760101A1 SU 1760101 A1 SU1760101 A1 SU 1760101A1 SU 894770336 A SU894770336 A SU 894770336A SU 4770336 A SU4770336 A SU 4770336A SU 1760101 A1 SU1760101 A1 SU 1760101A1
Authority
SU
USSR - Soviet Union
Prior art keywords
piston
spring
housing
radial channels
valve
Prior art date
Application number
SU894770336A
Other languages
Russian (ru)
Inventor
Василий Рэмович Сильвестров
Original Assignee
Всесоюзный научно-исследовательский и проектно-конструкторский институт геофизических методов исследований, испытания и контроля нефтегазоразведочных скважин
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Всесоюзный научно-исследовательский и проектно-конструкторский институт геофизических методов исследований, испытания и контроля нефтегазоразведочных скважин filed Critical Всесоюзный научно-исследовательский и проектно-конструкторский институт геофизических методов исследований, испытания и контроля нефтегазоразведочных скважин
Priority to SU894770336A priority Critical patent/SU1760101A1/en
Application granted granted Critical
Publication of SU1760101A1 publication Critical patent/SU1760101A1/en

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Abstract

The invention relates to the oil and gas industry and is intended to communicate and dissociate the annulus with the internal cavity of pipes during development, testing or flushing a well when there is a packer in the tool. The aim of the invention is to improve the efficiency of the valve while simplifying its management. The valve consists of a hollow body 1, in the lower part of which an annular chamber 2 is made, filled with compressed gas and connected to the annulus from the top by a spring-loaded piston 3, and from the bottom by a floating separation piston 4 and further through the channel 5, made in the lower part of the chamber 2, with the possibility of blocking the sleeve 6 when the valve is compressed. On the piston 3, two shoulders are made to the lever 7 and the radial channels 8. Between the housing 1, having bypass channels 9, and the piston 3, a spring-loaded sleeve 10 is installed with radial channels 11 and grooves 12 under the levers of the piston 3. The stepped piston 13 with cutouts 14 and 15 is installed in the housing 1 it can interact with its retainer 16. In addition, radial channels 17 and 18 are made in the upper part of the housing 1, as well as an elastic cuff 19 for blocking the radial channels 18, and a cutout 20 is made in piston 3 for interacting with the retainer 16. 1 ffl, 4 ill. 1L

Description

The invention relates to the oil and gas industry and is intended to communicate and dissociate the annulus with the internal cavity of the pipe during the development, testing or flushing of a well in the presence of a packer in the tool assembly.

The purpose of the invention is to increase the efficiency of the device while simplifying its management,

FMG.1 depicts a multi-cycle circulation valve in the transport

position; figure 2 - the same, in the working position, on fig.Z - the same, in the working position when conducting hydraulic fracturing; figure 4 - the same, in the working position during the backwash.

The valve consists of a hollow body 1, in the lower part of which an annular chamber 2 is made, filled with compressed gas and connected to the annulus from the top by a spring-loaded piston 3, and from below by a floating separating piston 4 and further through the channel 5, made at the bottom

It part of the chamber 2, with the possibility of blocking the sleeve 6 when the valve is compressed. Two shoulders arms 7 and radial channels 8 are made on piston 3. Between case 1, having bypass channels 9, and piston 3, a spring-loaded sleeve 10 is installed with radial channels 11 and grooves 12 under piston arms 3. The stepped piston 13 with notches 14 and 15 is installed in housing 1 with the ability to interact with its retainer 16. In addition, in the upper part of the housing 1 there are radial rollers 17 and 18, as well as an elastic cuff 19 for blocking the radial channels 18, and in the piston 3 there is a cutout 20 for interacting with the retainer 16 .

The valve operates as follows.

On the pipes, a test tool assembly is launched into the well, consisting at least of a packer (not shown) and a multi-cycle circulation valve. In the process of lowering in the chamber 2 filled with compressed gas, starting from a depth due to the pressure at which gas is pumped into the chamber, a pressure equal to the hydrostatic pressure is maintained by the movement of the piston 4. When installing the packer, channel 5 closes with sleeve 6 (FIG. 2). When the channel 5 is blocked, a direct flushing can be carried out through the valve, in this case the piston 13 moves down and opens the channels 18 through which, by deforming the elastic cuff 19, the formation fluid passes. In this position, the level of liquid in the pipes can also be reduced by pumping air with a compressor, first displacing the liquid from the pipes into the annulus, and then venting the air from there (when air is blown off, the piston 13 moves upwards and closes the channels 18).

For fracturing, i.e. the creation of significant repression on the reservoir only under the packer, increases the pressure in the annulus. This leads to a downward displacement of the piston 3 and the locking by the latch 16 of the piston 13, which makes it possible to create pressures in the pipes that significantly exceed the pressure in the annulus (Fig. 3).

To allow the fluid to be flushed out of the pipes by backwashing, an overpressure is first created in the annulus, while the piston 3 is displaced downwards, and the levers 7 capture the sleeve 10 by the grooves 12. Then the pressure in the siphon space is released;

returns to its original position by moving the sleeve 10 to align the radial channels 8, 9 and 11, thereby ensuring the passage of fluid from the annular

space in the tube (figure 4).

1 To return the valve to its original position, a direct circulation is created using a pump, with the result that the piston 13 displaces down and presses

on the other arm of the levers 7 and releases the sleeve 10, which, under the action of the spring, returns to its original position. In the future, using the valve, you can repeat any operation described

Claims (2)

1. Multi-cycle circulation valve comprising a hollow body with a latch, radial and bypass channels, a spring-loaded piston with two shoulders and radial channels, a stepped piston installed in the body with the possibility of blocking its channels and interacting with the latch,
characterized in that, in order to increase valve efficiency while simplifying control, it is provided with a spring-loaded bushing with radial channels and grooves under the levers of a spring-loaded piston installed between the housing and the spring-loaded piston, and the housing in the lower part is made with an annular chamber filled with compressed gas, and installed in it
a separating piston; in the lower part, the chamber has a channel for communication with the space behind the housing, which is designed to shut off the valve when the valve is compressed, and the spring-loaded piston
placed in the upper part of the annular chamber, the stepped piston is installed with the possibility of opening the radial channels of the housing in its lowest position, and the spring-loaded piston - with the possibility of fixing the stepped piston, blocking the radial channels of the housing and placing the two shoulders in the slots of the spring-loaded sleeve in its extreme lower position and moveable
sleeves with double-arm levers and housing bypass channels with radial channels of the sleeve and a spring-loaded piston in its extreme position.
2. A valve according to claim 1, characterized in that the housing on the outer surface in
the upper part is made with an elastic cuff to block its radial channels.
/ B
SU894770336A 1989-12-19 1989-12-19 Multiple-cycle circulation valve SU1760101A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU894770336A SU1760101A1 (en) 1989-12-19 1989-12-19 Multiple-cycle circulation valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU894770336A SU1760101A1 (en) 1989-12-19 1989-12-19 Multiple-cycle circulation valve

Publications (1)

Publication Number Publication Date
SU1760101A1 true SU1760101A1 (en) 1992-09-07

Family

ID=21485264

Family Applications (1)

Application Number Title Priority Date Filing Date
SU894770336A SU1760101A1 (en) 1989-12-19 1989-12-19 Multiple-cycle circulation valve

Country Status (1)

Country Link
SU (1) SU1760101A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2443849C2 (en) * 2007-10-17 2012-02-27 Сальтель Индюстри Control device of pneumatic tool for processing of well or pipe
RU2448238C2 (en) * 2006-09-18 2012-04-20 Бейкер Хьюз Инкорпорейтед Well hydraulic control system with fail-safe characteristics (versions)

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Авторское свидетельство № 1016495, кл. Е21 В 49/00, 1983. Авторское свидетельство СССР № 1678114, кл. Е 21 В 49/00, 1988 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2448238C2 (en) * 2006-09-18 2012-04-20 Бейкер Хьюз Инкорпорейтед Well hydraulic control system with fail-safe characteristics (versions)
RU2443849C2 (en) * 2007-10-17 2012-02-27 Сальтель Индюстри Control device of pneumatic tool for processing of well or pipe

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