RU77637U1 - OIL PRODUCTION COMPLEX WITH HYDROGEN SULFUR OIL CONTENT AND PUMPING UNIT FOR IT - Google Patents

Abstract

The complex with a pumping unit is designed for oil production with a high content of hydrogen sulfide. The complex includes equipment that is lowered into the well on a pipe string 1. The equipment contains a packer 2 forming an overpacker 3 and a subpacker 4 zone. Packer 2 is made with end-to-end 5 and an additional end-to-end 6 channels. The equipment contains a gas outlet device in the form of a gas outlet tube 7. The tube 7 is placed in the through channel 5 of the packer 2. The equipment contains a borehole chamber 10 with a check valve 11 installed under the packer 2. The chamber 10 is provided with a tube for supplying the inhibitor liquid 12. The tube 12 is placed in an additional the through channel 6 of the packer 2. The tube 12 connects the borehole chamber 10 to the over-packer zone 3. The tube 12 may have a telescopic connection 9. The tube 12 may have a check valve 8. The equipment includes a pump unit 14. Equipment The inlet comprises a well-controlled circulation valve 13 installed above the pump unit 14. The pump unit 14 contains an electric centrifugal pump 15 and a jet pump 17. The pump 15 is mounted above the packer 2 and is equipped with a cable 16. The pump 17 is located above the pump 15. The pump 17 is connected to the gas outlet the tube 7. The tube 7 communicates with the pump 17 with a sub-packer zone 4. The technical solution allows to protect the pipe string and equipment of the complex from the effects of highly concentrated hydrogen sulfide, both outside and inside, and to improve performance asosnoy installation.

Description

The utility model relates to the oil and gas industry, namely to a complex with a pumping unit for oil production with a high content of hydrogen sulfide.

A known method of oil production by selecting a submersible pump suspended on a string of tubing, formation fluid from a well, RU No. 2296211 C1, E21B 43/00, 2007.03.27.

Known equipment for the operation of the well, containing a string of tubing, a downhole pump, a packer, with a gas pipe installed on it, equipped with a valve, SU No. 1601350 A1, E21B 43/00, 1990.10.23.

A well-known downhole pump installation comprising a jet pump installed in a well on a pipe string and a submersible pump connected to its nozzle, below which, with an emphasis on the bottom, is a self-contained pipe string equipped with a packer in the upper part and a check valve in the lower part, RU.N45454 U1, E21B 43 / 00,2005.05.20.

A device for operating wells is known, comprising a downhole pump located in a well at the lower end of the tubing string interacting with fountain fittings,

consisting of discharge and discharge pipelines connected to the production pipeline by means of a jet pump, RU No. 50596 U1, E21B 43/00, 2006.01.20.

Known downhole installation for regulating and cutting off the flow of medium, including a pipe string lowered into the well, equipped with a packer, a borehole chamber with through holes installed under the packer, RU No. 2194152 C2, ЕВВ 43/12, Е21В 34/06, 2002.12.10.

The known installations do not provide operating conditions for equipment during oil production with a high concentration of hydrogen sulfide.

A well-known installation of Sharifov for the operation of the well, including equipment, lowered and installed in the well on a pipe string, containing a packer forming an over-packer and under-packer zone and made with a through channel, a gas outlet device, a borehole chamber with a valve and a pumping unit, RU No. 2300668 C2, F04D 13/10, 2007.06.10.

This technical solution was adopted as the "closest analogue" of this utility model.

However, it has a disadvantage.

In the “closest analogue”, all options for placing a gas outlet device provide for bleeding gas from the sub-packer zone to the pipe string, which does not protect the production pipe string

and all equipment from the active impact of hydrogen sulfide in oil production with its increased content.

The present utility model is based on the solution of a problem that allows, under conditions of oil production with a high content of hydrogen sulfide, to protect the pipe string and equipment of the complex from the effects of highly concentrated hydrogen sulfide, both outside and inside, to exclude contact of the working fluid with the surface of the equipment and improve the operating conditions of the pump installation.

According to the utility model, this problem is solved due to the fact that the oil production complex with a high content of hydrogen sulfide includes equipment lowered into the well on a pipe string containing a packer forming an overpacker and underpacker zone and made with a through channel, a gas outlet device, a well chamber with a valve and pump installation.

The well chamber with a check valve is installed under the packer, made with an additional through channel, and is equipped with a pipe for supplying an inhibitor fluid that is large enough to be placed in the additional through channel of the packer and for connecting the well chamber with the over-packer zone, and a vent device is located in the through channel of the packer in the form of a gas outlet, while

a circulating valve controlled from the mouth is installed above the pump unit.

In addition, the vent pipe is equipped with a check valve.

In addition, the vent pipe is equipped with a telescopic connection.

According to a utility model, this problem is solved due to the fact that the pumping unit of the complex, which includes equipment lowered into the well on a pipe string, contains a packer forming an overpacker and underpacker zone, made with through and additional through channels, a gas vent device in the form of a gas outlet tube in the through channel of the packer, a borehole chamber with a check valve installed under the packer and provided with a pipe for supplying inhibitory fluid located in the additional through channel of the pack pa and connecting the downhole camera with nadpakernoy zone and controllable from the mouth of circulating valve, the pump assembly comprises electric centrifugal pump mounted above the packer and provided with a cable.

The pump installation contains at least one more pump, for example, a jet pump, which is located above the electric centrifugal pump and is connected to a gas pipe that communicates with the sub-packer jet pump.

The applicant has not identified sources containing information about the technical solution that is identical to the characteristics given in the formula of this utility model, this determines, according to the applicant, the utility model meets the criterion of “novelty”.

The essence of the utility model is illustrated by the drawing, which shows the layout of the complex and the pumping unit for oil production with a high content of hydrogen sulfide.

The complex includes equipment lowered into the well on a pipe string 1.

The equipment contains:

Packer - 2,

nadpakerny zone - 3,

sub-packer zone - 4,

through channel (in packer 2) - 5,

additional through channel (in packer 2) - 6.

The gas outlet device in the form of a gas outlet tube - 7,

non-return valve (in the vent pipe 7) - 8,

telescopic connection (in gas pipe 7) - 9.

Downhole camera - 10,

check valve (borehole chamber 10) - 11,

a tube for supplying inhibitory fluid - 12.

Circulation valve - 13.

Pump installation - 14,

electric centrifugal pump - 15,

cable (for electric centrifugal pump 15) - 16,

jet pump - 17.

The downhole chamber 10 with a check valve 11 is installed under the packer 2.

The tube for supplying the inhibitory liquid 12 has dimensions sufficient to be placed in the additional through channel 6 of the packer 2.

The tube for supplying the inhibitory fluid 12 connects the borehole chamber 10 to the overpacker zone 3.

To eliminate temperature deformations with a large length of the vent pipe 7, a telescopic device 9 can be built into it.

In the gas outlet tube 7, for a one-way gas passage behind the telescopic connection 9, a check valve 8 can be installed.

The well-controlled circulation valve 13 is installed above the pump unit 14.

The jet pump 17 is located above the electric centrifugal pump 15. The jet pump 17 is connected to a gas pipe 7.

The vent pipe 7 communicates with the jet pump 17 with a sub-packer zone 4.

Along the string of pipes 1 laid cable 16 from the electric centrifugal pump 15.

The complex and pumping unit operate as follows.

A sequentially installed equipment is lowered into a water-muffled well on a pipe string 1: a funnel, a borehole chamber 10 with a check valve 11, a packer 2, an electric centrifugal pump 15 and a jet 17 pump, a nipple and a check valve installed by cable technology, and a circulation valve 13 controlled from the mouth.

Packer complex is packaged 2.

A circulation valve 13 controlled from the mouth is opened and water is replaced in the annulus with an inhibitor fluid.

The circulation valve 13 controlled from the mouth is closed and the electric centrifugal pump 15 is started. The electric centrifugal pump 15 creates a vacuum under the packer 2 in the process of supplying oil through the pipe string elevator 1. During the vacuum process, gas is released from the oil, which flows under the packer 2. The electric centrifugal pump 15, forcing oil through the jet pump 17 to the wellhead, creates a vacuum in the

jet pump 17. Gas through a gas pipe 7 from under the packer 2 rushes through the jet pump 17 into the elevator of the pipe string 1, further contributing to the aeration of oil in the jet pump 17.

At the same time, under the packer 2 inside the borehole chamber 10, a vacuum is also created that opens the check valve 11, which is adjustable for pressure differences, and the inhibitor fluid from the above-packer zone 3 of the well passes through the pipe for supplying the inhibitor fluid 12 to the elevator of the pipe string 1, processing it.

The pipe string 1 and equipment lowered into the well and operating under conditions of oil production with a high content of hydrogen sulfide are protected both from the outside and from the inside by installing packer 2 above the perforation zone of the well, making through 5 and additional 6 channels in packer 2, placing in them a gas outlet tube 7 and a tube for supplying the inhibitory liquid 12, respectively.

The installation of the jet pump 17 improves the operating conditions of the pump unit 14, reduces the load on the electric centrifugal pump 15, due to the connection of the jet pump 17 with the gas pipe 7.

The proposed set includes equipment that is widely used in the oil and gas industry and pilot tests determine, according to the applicant, its compliance with the criterion of "industrial applicability".

Claims (4)

1. A complex of oil production with a high content of hydrogen sulfide, including equipment lowered into the well on a pipe string, containing a packer forming an over-packer and under-packer zone and made with a through channel, a gas outlet device, a borehole chamber with a valve and a pumping unit, characterized in that the borehole a chamber with a non-return valve is installed under the packer, made with an additional through channel, and is equipped with a pipe for supplying an inhibitor liquid, which is large enough to be placed in the a through channel of the packer and for connecting the borehole chamber to the above-packer zone, and in the through channel of the packer there is a gas vent device in the form of a gas vent tube, while a circulation valve controlled from the mouth is installed above the pump unit. 2. The complex according to claim 1, characterized in that the vent pipe is equipped with a check valve. 3. The complex according to claim 1, characterized in that the vent pipe is equipped with a telescopic connection. 4. The pump installation of the complex, including equipment, lowered and installed in the well on the pipe string, containing a packer forming an over-packer and under-packer zones, made with through and additional through channels, a gas outlet device in the form of a gas outlet located in the through channel of the packer, a borehole chamber with a check valve installed under the packer and provided with a pipe for supplying inhibitory fluid located in an additional through channel of the packer and connecting the borehole chamber to the overpack zone, and controlled from the mouth of the circulation valve containing an electric centrifugal pump mounted above the packer and equipped with a cable, characterized in that the pump installation contains at least one pump, for example, a jet pump, which is located above the electric centrifugal pump and connected to a gas pipe communicating the jet pump with a sub-packer zone.