RU161030U1 - PACKER DEVICE FOR CUTTING OFF THE INTERVAL OF AN LEAKAGE OF THE OPERATIONAL COLUMN - Google Patents

Abstract

1. Device for cutting off the interval of violations of the production casing, containing two packers connected by a connecting pipe, the length of which is longer than the length of the zone of violation, with a perforated pipe connected to it above the upper packer, and a check valve installed in the connecting pipe to check the upper packer for tightness. 2. The device according to claim 1, connected to a sucker rod pump by means of a perforated nozzle. 3. The device according to claim 1, wherein a filter is installed below the lower packer.

Description

FIELD OF TECHNOLOGY

The utility model relates to the field of the oil and gas industry and can be used in oil wells that have production string disturbances.

BACKGROUND

A device is known (see RU 2513374) containing a lower packer, a pipe, an upper packer, a left sub, a plugged sleeve, a perforated pipe. After planting packers, fill the well above the upper packer with process fluid and pressure test the production casing to determine the tightness of the planting of the top packer, while the plugged process prevents ingress of process fluid into the pipe. Upon reaching a tight fit of the upper packer, the landing tool is turned off and the landing tool is removed with a perforated nozzle, a plugged sleeve and a left sub from the production casing to the surface, and the well is put into operation.

The disadvantages of this device include the need for additional tripping operations to remove the plugged coupling, which increases the time for underground repair of the well and finding the well idle.

The objective of this utility model is to create a packer device for cutting off the interval of violation of the production string, which reduces the production and time costs of the repair operation to cut off the interval of violation, ensuring stable operation of the equipment.

ESSENCE OF A USEFUL MODEL

This problem is solved with the help of a device for cutting off the interval of violation of the production string containing two packers connected by a connecting pipe, the length of which is longer than the length of the zone of violation, while a perforated pipe is installed above the upper packer, and a check valve is installed on the connecting pipe to check the upper packer for leaks . The device is connected to a sucker rod pump through a perforated nozzle. Below the lower packer is a filter.

The technical result from the use of the utility model is to reduce production and time costs for a repair operation to cut off the interval of violation in the production casing without additional tripping operations, while ensuring the stability of the equipment.

Placing a check valve in the interpacker space allows checking the tightness of the upper packer, and after pressure testing the column there is no need to remove the check valve, as it provides the passage of formation fluid to the pump.

These signs are significant and interconnected with the formation of a stable set of essential features sufficient to obtain the specified technical result.

A comparative analysis of the proposed technical solution with the identified prior art analogue, from which the utility model does not explicitly follow for a specialist in the oil and gas industry, showed that it is unknown, and taking into account the possibility of industrial production of a packer device, we can conclude that it meets the patentability criteria .

BRIEF DESCRIPTION OF THE FIGURES

The drawing schematically shows a General view of the proposed packer device.

DETAILED DESCRIPTION OF THE DEVICE

The packer device includes an upper packer 5 and a lower packer 6, interconnected by a connecting pipe in which a check valve 7 is installed, made in the form of a saddle in which the ball is located. In the above-packer space of the upper packer 5 there is a perforated pipe 8 connected to the inlet of the SHGN 2. Pump 2, in turn, is connected to the tubing string 1. A filter 9 is installed below the lower packer 6.

Installation of the device is carried out before its descent into the well. Installation is carried out in the following sequence.

The lower packer 6 is screwed onto the filter 9, a connecting pipe of the required length is attached to the packer 6. The length of the connecting pipe exceeds the length of the violation interval.

In the connecting pipe there is a non-return valve in the form of a landing seat with a ball. Then, the upper packer 5 is attached to the connecting pipe. A perforated pipe 8 is screwed to the upper packer 5, which is attached to the pump 2.

The presence of a non-return valve in combination with a perforated nozzle allows simultaneous crimping of the production string above the cutoff interval and checking the upper packer for leaks, while there is no need for additional tripping operations to remove additional parts that prevent the penetration of the process fluid into the under-packer space.

The device is attached to the tubing and lowered into the production string 4. The packers are installed, cutting off the interval of violation 3. In this case, the lower packer 6 is installed between the roof of the reservoir (perforation interval (10)) and the lower interval of zone 3 of the violation of the production string 4, and the upper packer 5 is higher the upper interval of zone 3 violations of the production string 4. Through the annular space (between the tubing and the production string) pump the process fluid. The annulus is pressure tested and, having previously closed the tube valve on the tubing, the tightness of the upper packer is determined by the pressure in the annulus. If the pressure does not drop, thus, the tightness is confirmed, start the well, pumping out the process fluid from it.

The water-gas-oil mixture (indicated by arrows in the drawing) from the sub-packer zone through the internal volume of the tubing 1 enters the pump 2 and the annulus (tubing 1 and production string 4) above the upper packer 5. The perforated nozzle 8 is configured to pass the reservoir fluid into the annulus ( in the drawing is indicated by arrows), which allows you to track the dynamic level to control the optimal operation of the well and, if necessary, select the necessary parameters for the operation of pump 2, due to I pump plunger stroke length of 2 and the number of swings pumping unit, driving the pump 2.

Thus, the interval of violation of the production casing 4 is "cut off" and the proposed packer device allows you to run the well into operation.

The device may vary depending on the packers used, the location of the violation interval of the production string (above or below the perforation interval. If the violation interval is below the perforation interval, a plug is screwed instead of filter 9, and a perforated pipe 8 is screwed on the connecting pipe instead of the check valve 7, there is no need to install the upper packer 5. It is also possible to use a spring-loaded plate instead of the check valve 7 (seats with a ball) in this device open valve in wells with a large angle of inclination of the production string.

The design of the device is simple to manufacture, does not require the development of new equipment and the re-equipment of existing facilities, and the tools used are widely used in the oil and gas industry, which confirms the possibility of practical implementation and achievement of a technical result.

Claims (3)

1. Device for cutting off the interval of violations of the production string, containing two packers connected by a connecting pipe, the length of which is longer than the length of the zone of violation, while above the upper packer there is a perforated pipe connected to it, and a check valve is installed in the connecting pipe to check the upper packer for tightness. 2. The device according to claim 1, connected to a sucker rod pump by means of a perforated nozzle. 3. The device according to claim 1, wherein a filter is installed below the lower packer.

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