CN209963370U

CN209963370U - Underwater oilfield ESP power distribution system

Info

Publication number: CN209963370U
Application number: CN201822061374.0U
Authority: CN
Inventors: 陈跃明
Original assignee: Median Energy Technology (shanghai) Co Ltd; American Drilling Deep Sea Energy Technology Research and Development Shanghai Co Ltd
Current assignee: Median Energy Technology (shanghai) Co Ltd; American Drilling Deep Sea Energy Technology Research and Development Shanghai Co Ltd
Priority date: 2018-12-10
Filing date: 2018-12-10
Publication date: 2020-01-17
Anticipated expiration: 2028-12-10

Abstract

The utility model discloses an among the oil field ESP power distribution system under water, three phase current high pressure submarine cable connects each ROV plug connector by PT end access underwater power distribution unit SPDU under water, socket department via high-tension electricity jumper connection to high voltage power supply change over switch HPCS, high voltage power supply change over switch HPCS switches on its plug that sets up under the control of surface of water control system, pass through the connector harness access cable and pass through the ware, finally communicate shaft bottom electric submersible pump and make electric submersible pump work, reach the oil recovery rate mesh that improves the oil field under water.

Description

Underwater oilfield ESP power distribution system

Technical Field

The utility model relates to a distribution control technique for oil field shaft bottom electric submersible pump under water provides an oil field ESP electric power distribution system under water, improves the oil recovery rate in oil field under water.

Background

After the underwater oil field is put into operation, along with the development and production of the underwater oil field for a long time, the pressure of an oil well can be continuously reduced, and the oil recovery rate can be gradually reduced. In order to continuously maintain the oil yield of an oil field, a bottom hole submersible pump (ESP) is adopted, and a power distribution control scheme for the bottom hole ESP of the underwater oil field is urgently needed.

SUMMERY OF THE UTILITY MODEL

The utility model provides an oil field ESP electric power distribution system under water for start-up shaft bottom electric submersible pump carries out work, realizes the improvement of oil recovery rate.

In the ESP power distribution system of the underwater oilfield, an underwater three-phase power high-voltage submarine cable is connected into an underwater power distribution unit from a PT end, is divided into a plurality of paths through a watertight junction box, and is respectively connected with a plurality of ROV plug connectors;

the jumper assembly comprises a watertight electric connector and a watertight cable which connects the upper end and the lower end of the watertight electric connector; the upper end of the watertight electric joint is inserted into a corresponding ROV plug connector of the underwater power supply distribution unit; the lower end of the watertight electric connector is connected to a socket at a high-voltage power supply change-over switch on the ROV operation panel;

the high-voltage power supply change-over switch is connected with a plurality of underwater ROV wet plugs; and the socket at one end of each wire harness is arranged on the ROV operation panel and correspondingly connected with the underwater ROV wet plug, and the long-neck ROV plugs at the other ends of the wire harnesses are respectively connected into the cable penetrator and connected with the connector assembly in the cable penetrator so as to be communicated with the underground electric submersible pump.

Optionally, the jumper assembly is a high voltage jumper subsea power source ROV wet plug-to-plug jumper assembly; the watertight electric connector uses an ROV wet three-phase belt grounding 8KV220A plug, and the watertight cable uses an underwater jumper hose;

the socket at the high-voltage power supply change-over switch is an underwater ROV wet three-phase grounding 8KV220A socket; the underwater ROV wet-type plug is an underwater ROV wet-type three-phase grounding 8KV220A plug.

Optionally, the underwater power distribution unit is provided with an underwater power parking socket and sleeved with a protective cap, and the underwater power parking socket without the protective cap is connected with a watertight electric connector operated by the underwater robot.

Optionally, the underwater power distribution unit is provided with a wet resistance bridge test socket and sleeved with a protective sleeve, and an electric bridge is arranged inside the wet resistance bridge test socket;

the wet resistance bridge test socket with the protective cap removed is connected with the lower end of the watertight electric connector, or the wet resistance bridge test plug, or the wet open circuit test plug.

Optionally, an underwater power dry test resistance bridge connector is arranged at the connector assembly, and the upper end of the connector assembly is connected with a long-neck ROV plug of a wire harness.

Optionally, an underwater power deck test plug for external tree cap testing or an underwater power deck test plug for tubing hanger testing is arranged at the connector assembly; and an underwater power supply deck test socket is correspondingly arranged in cooperation with the underwater power supply deck test plug.

The utility model discloses an among the oil field ESP power distribution system under water, three phase current high pressure submarine cable is connected each ROV plug connector by PT end access SPDU (power distribution unit under water), be connected to HPCS (high voltage power supply change over switch) socket department via high-tension electricity jumper pipe (HV EFL), HPCS switches on the plug that sets up under the control of surface of water control system, pass through the connector harness access cable and pass through the ware, finally communicate shaft bottom electric submersible pump and make electric submersible pump work, reach the oil recovery rate mesh that improves the oil field under water.

Drawings

Fig. 1 is a schematic connection diagram of a subsea power distribution unit in a power distribution system according to the present invention;

fig. 2 is a schematic connection diagram of a high voltage power switch in the power distribution system of the present invention;

FIG. 3 is a schematic diagram of a wet resistive bridge test plug;

FIG. 4 is a schematic view of a wet open test plug;

FIG. 5 is a schematic view of an underwater power deck test plug for external tree cap testing

FIG. 6 is a schematic view of an underwater power deck test plug for tubing hanger testing

Figure 7 is a schematic view of an underwater power deck test socket.

Detailed Description

Referring to fig. 1, fig. 2 in cooperation, the utility model discloses an among the oil field ESP power distribution system under water, three phase power supply high pressure submarine cable is connected into underwater power distribution unit 20 (SPDU) by the PT end under water, divide into a plurality of ways through watertight terminal box 1, connects each ROV plug connector respectively. An HV EFL (electrical jumper) underwater power ROV wet plug to plug jumper assembly (jumper assembly 2 for short) comprising a watertight electrical connector 25 and a watertight cable 3; the watertight electric connector 25 of the embodiment uses an ROV wet-type or three-phase 8KV220A plug with grounding, and the watertight cable 3 connected with the upper end and the lower end uses an underwater jumper hose; the upper end of the watertight electric connector 25 is externally plugged into each ROV plug connector of the underwater power distribution unit 20; the lower end of the watertight electrical connector 25 is connected to a socket 24c on the ROV operation panel at a high voltage power switch 24a (HPCS) (in this example, an underwater ROV wet three-phase belt grounding 8KV220A socket is used). The socket 24c may be fitted with a protective cap 11 when not in use.

The underwater power distribution unit 20 is further provided with an underwater power parking socket 6 and a wet resistance bridge test socket 7. During installation or maintenance, the operation of an ROV (underwater robot) can temporarily stop one end of the watertight electric connector 25 at the underwater power supply parking socket 6; after the completion of the process, the watertight electric connector 25 is pulled out, and the underwater power supply parking socket 6 is sleeved with the protective cap 11. A bridge is arranged in the wet resistance bridge test socket 7; during land testing, the protective cap 11 at the test socket 7 of the wet resistance bridge is removed, and the lower end of the watertight electric connector 25 is plugged to simulate an underwater electric submersible pump; the wet resistance bridge test plug 8 or the wet open test plug 23 may be inserted into the wet resistance bridge test socket 7 to perform a corresponding test.

The high-voltage power supply change-over switch 24a is connected with each plug 24b (in this example, an underwater ROV wet three-phase belt grounding 8KV220A plug is used) under the control of a water surface control system, and then the plugs are respectively connected with a cable traversing device by correspondingly connecting a long-neck ROV plug to an underwater socket wire harness (referred to as a wire harness 4) to be connected with an underwater power supply tubing hanger wet three-phase socket connector assembly (referred to as a connector assembly 5) therein, and finally the underwater power supply tubing hanger is connected with a downhole electric submersible pump to enable the electric submersible pump to work, so that the aim of improving the oil recovery rate of.

The socket at one end of each wiring harness 4 is mounted on an ROV operation panel, and the other end of the wiring harness 4 connected with an underwater jumper hose is a long-neck ROV plug and is connected into a connector assembly 5. The connector assembly 5 comprises an underwater power supply oil pipe hanger wet socket, an underwater power supply dry plug connector and the like.

The connector assembly 5 can be provided with an underwater power dry-type test resistance bridge connector 13, the upper end of the connector assembly is connected with a long-neck ROV plug of the wiring harness 4, and the lower end of the connector assembly is not connected and is used in land test. An underwater power supply

deck test plug

16 or 17 can be arranged at the connector assembly 5 and is correspondingly used in the external tree cap test and the tubing hanger test; and the resistor bridge connector 13 is tested in place of the underwater power supply in a dry mode. An underwater power deck test socket 15 is provided in cooperation with an underwater power

deck test plug

16 or 17.

While the present invention has been described in detail with reference to the preferred embodiments thereof, it should be understood that the above description should not be taken as limiting the present invention. Numerous modifications and alterations to the present invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be limited only by the attached claims.

Claims

1. An ESP power distribution system of an underwater oilfield is characterized in that an underwater three-phase power high-voltage submarine cable is connected into an underwater power distribution unit (20) from a PT end, is divided into a plurality of paths through a watertight junction box (1), and is respectively connected with a plurality of ROV plug connectors;

the jumper assembly (2) comprises a watertight electric connector (25) and a watertight cable (3) connecting the upper end and the lower end of the watertight electric connector (25); the upper end of the watertight electrical connector (25) is plugged into a corresponding ROV plug connector of the underwater power distribution unit (20); the lower end of the watertight electric connector (25) is connected to a socket (24 c) at the high-voltage power supply change-over switch (24 a) on the ROV operation panel;

the high-voltage power supply change-over switch (24 a) is connected with a plurality of underwater ROV wet plugs (24 b); and the sockets at one end of each of the wiring harnesses (4) are arranged on the ROV operation panel and correspondingly connected with the underwater ROV wet plug (24 b), and the long-neck ROV plugs at the other end of each wiring harness are respectively connected into the cable penetrators and connected with the connector assemblies (5) in the cable penetrators so as to be communicated with the underground electric submersible pump.

2. The subsea field ESP power distribution system according to claim 1, characterized in that said jumper assembly (2) is a high voltage jumper subsea power source ROV wet plug-to-plug jumper assembly; the watertight electric connector (25) uses an ROV wet three-phase belt grounding 8KV220A plug, and the watertight cable (3) uses an underwater jumper hose;

the socket (24 c) at the high-voltage power supply changeover switch (24 a) is an underwater ROV wet three-phase belt grounding 8KV220A socket; the underwater ROV wet plug (24 b) is an underwater ROV wet three-phase belt grounding 8KV220A plug.

3. Subsea oilfield ESP power distribution system according to claim 1, wherein the subsea power distribution unit (20) is provided with a subsea power parking socket (6) and is sheathed with a protective cap (11), the subsea power parking socket (6) with the protective cap (11) removed being connected to a watertight electrical connection (25) operated by a subsea robot.

4. The underwater oilfield ESP power distribution system according to claim 1, wherein the underwater power distribution unit (20) is provided with a wet resistance bridge test socket (7) and sleeved with a protective cap (11), and a power bridge is arranged inside the wet resistance bridge test socket (7);

the wet resistance bridge test socket (7) with the protective cap (11) removed is connected with the lower end of the watertight electric connector (25), or the wet resistance bridge test plug (8), or the wet open circuit test plug (23).

5. The subsea oilfield ESP power distribution system according to claim 1, wherein a subsea power dry test resistive bridge connector (13) is provided at the connector assembly (5), the upper end of which is connected to a long neck ROV plug of the wiring harness (4).

6. The subsea field ESP power distribution system according to claim 1, characterized in that at the connector assembly (5) there is provided a first subsea power deck test plug for external tree cap testing or a second subsea power deck test plug for tubing hanger testing; and an underwater power supply deck test socket (15) is correspondingly arranged in cooperation with the first underwater power supply deck test plug or the second underwater power supply deck test plug.