RU46041U1 - MANAGEMENT SYSTEM FOR EACH WELL - Google Patents

Abstract

The utility model relates to devices for controlling the flow of gaseous and liquid substances using elements that are sensitive to the pressure of the medium and can be used in gas producing fields equipped with an inhibitor line from a complex gas treatment unit (UKPG) to the well cluster. The proposed control system for each well in the cluster contains a well cluster with an inhibitor input device into the wells, an inhibitor line with an inhibitor supply unit, and a pipeline from the well cluster to the gas treatment facility. New that distinguishes the proposed solution from the prototype is that they are additionally equipped with an inhibitor input line switch, and a shut-off device of “normally closed” design is installed on each of the wells in front of the inhibitor input device, and the device drive is connected to the inhibitor input line. The inhibitor input line switch contains a sealed housing with a camshaft with cams placed therein and an intermittent mechanism connected to it, a spring-loaded rod interacting with this mechanism and valves installed in the housing, which switch the inhibitor input lines alternately or simultaneously according to the established rules for interaction with cams. The system provides alternate switching of the inhibitor input lines into each well of the cluster and control of the locking devices installed on each well of the cluster.

Description

The proposed utility model relates to devices for controlling the flow of gaseous and liquid substances using elements that are sensitive to the pressure of the medium and can be used in gas producing fields equipped with an inhibitor line from the complex gas treatment unit (UKGI) to the well cluster.

The development of powerful gas fields in Siberia and the Far North (Urengoyskoye and others) is associated with the operation of fields in hard-to-reach and climatic-difficult areas. Specific features of obtaining information on the operation of wells are the dispersal of technological objects (wells) over a large area, climatic conditions, the complexity of organizing communication channels between wells and gas treatment plants. In such conditions, special maintenance is required to control the well, for example, bypassing or by flying around the wells. This leads either to a rise in the cost of maintenance, or with an increase in the frequency, to a decrease in its efficiency, and as a result, untimely adoption of measures to change the technological regime of the well.

Known systems for remote switching of wells used to increase the efficiency of monitoring parameters of a well (Revue de A.F.T.R., 1971, No. 207, p.p.39-46)

However, such solutions require the installation of a special control and communication line, for example, cable communication, or the installation of sensors with an output and a telemechanics system, which increases the cost of capital for the arrangement. The reliability of such devices is low.

However, it is known that in accordance with technological requirements. especially in the Far North and Siberia, a hydrate inhibitor (methanol) is introduced into the wells to prevent the formation of hydrates in the plumes, and also, if necessary, a corrosion inhibitor. At the same time, the centralized scheme was most widely used when a common source of injection of the inhibitor in the supply line to the wellhead was installed at the gas treatment facility.

A well-known control system for overlapping gas wells (AS No. 1622588, MKI5: E 21 B 43/00, F 17 D 1/00, publ. 23.01.1991).

However, the known device is designed to switch the wellbore and cannot be used to switch each wellbore separately, which is necessary when researching the technological parameters of the wells.

The problem to which the utility model is directed is. in order to create such a technical solution, using which it would be possible to remotely switch the wellbore as a whole and each wellbore separately, and at the same time there would be no need to provide the well with additional control lines.

This problem can be solved by using the inhibitor pipeline with which the gas field is equipped as a control line. This will provide an opportunity to reduce the cost of work, increase the reliability and durability of the system.

To achieve the named technical result, the proposed control system for each well in the cluster contains a well cluster with an inhibitor input device into the wells, an inhibitor line with an inhibitor supply unit, and a pipeline from the well cluster to the gas treatment facility.

A new feature that distinguishes the proposed solution from the prototype is that it is additionally equipped with an inhibitor input line switch and a shut-off device of “normally closed” design is installed on each of the wells in front of the inhibitor input device, and the device drive is connected to the inhibitor input line.

The inhibitor input line switch contains a sealed housing with a camshaft with cams placed therein and an intermittent mechanism connected to it, a spring-loaded rod interacting with this mechanism and valves installed in the housing, which switch the inhibitor input lines alternately or simultaneously according to the established rules for interaction with cams.

The system provides alternate switching of the inhibitor input lines into each well of the cluster and control of the locking devices installed on each well of the cluster.

The alleged invention is depicted in the drawing, where:

in Fig 1. - System for managing each well of the bush

figure 2 - Switch input lines of the inhibitor

The system comprises a well bush 1 with devices for introducing an inhibitor and a well 2, an inhibitor line 3, an inhibitor 4 supply unit, a pipeline from the well

wells at UKPG 5, switch of the inhibitor input lines 6, shut-off devices of the “normally closed” design 7 with drive 8 and lines 9 connecting it to the inhibitor input lines. The inhibitor input line switch comprises a sealed housing 10 with a camshaft 11 located therein with cams 12 and a discontinuous mechanism 13 connected thereto, interacting with this mechanism, a spring-loaded stem 14 and valves 15 installed in the housing 15. switching the inhibitor input lines alternately or simultaneously according to the set regulations when interacting with cams.

Management of each well of the bush is as follows. During the operation of the well’s wells, the amount of inhibitor determined by the technological regulations enters through all open wells of the switch and the shut-off devices on each well of the well are open. To determine the technological parameters of one of the wells in the cluster using the switch 6, the inhibitor is shut off to the remaining wells, while the shut-off devices 7 of these wells are closed by the pressure of the transported medium, and the studied well remains open. To carry out this switch, upon the command of the gas treatment unit, the inhibitor supply unit increases the inhibitor consumption by 1.5-2 times compared to the nominal one according to the technological regulations, while the pressure in the inhibitor line increases and the rod 14 overcomes the force of the spring holding it in its original position. The moving rod 14 through the intermittent action 13 rotates the camshaft 11 with the cams 12 at a certain angle. After that, the inhibitor supply decreases to nominal, the pressure in the inhibitor line decreases and the spring returns the rod 14 to its original position, which through the intermittent action 13 rotates the camshaft 11 so that one of the valves 10 remains open and the rest are closed, blocking the supply of the inhibitor in the wells of the bush except for one given. To connect the next well, the next cycle is performed similarly to the previous one. The procedure for switching wells is determined by the installation of cams relative to each other.

This system has a fairly high level of reliability because:

- the well switch mechanism is in a sealed enclosure filled with an inhibitor;

- the switch is controlled directly by the inhibitor, which eliminates the freezing of communications and the drive;

- environmental requirements are provided, as there are no emissions of natural gas or inhibitor into the atmosphere;

- the efficiency of the system on the well cluster is ensured and for the management of wells in the cluster, electric power and special communication lines are not required.

Claims (2)

1. The control system for each well in the bush, including a well bush with devices for introducing the inhibitor into the wells, an inhibitor line with an inhibitor supply unit, a pipeline from the well cluster to the integrated gas treatment unit (UKPG), characterized in that the system is equipped with a switch of the inhibitor input lines and each of the wells in front of the inhibitor input device has a "normally closed" shut-off device installed, and the device drive is connected to the inhibitor input line. 2. The system according to claim 1, characterized in that the switch of the input lines of the inhibitor comprises a sealed housing with a camshaft disposed in it with cams and an intermittent mechanism connected to it, a spring-loaded rod interacting with this mechanism and valves that switch input lines installed in the housing inhibitor alternately or simultaneously according to the established rules when interacting with cams.