Bridge-shooting combined electric drive hydraulic control grease injection system

Abstract

The utility model discloses an electric-drive hydraulic-control grease injection system for bridge-shot combined operation, which belongs to the technical field of oil-gas field development and comprises an electric control unit, and an electric-drive high-pressure grease injection unit, an electric-drive hydraulic control unit and a quick pressure test unit which are respectively connected with the software program electric control unit, the electric drive high-pressure grease injection unit is connected with the sealing grease box and used for pumping sealing grease out of the sealing grease box and feeding the sealing grease into the grease injection sealing head or the multi-wellhead blowout preventer. The electric drive hydraulic control unit is connected with the oil tank; the rapid pressure test unit is connected with the oil tank and is used for pressurizing the hydraulic oil and outputting the hydraulic oil to the multi-wellhead rapid pressure test nipple; the electric drive high-pressure grease injection unit, the electric drive hydraulic control unit and the rapid pressure test unit are arranged, the three units share one electric control unit, one grease injection system is integrated, high integration of one-dragging-three and one-dragging-two bridge shooting operation multiple systems is achieved, centralized control can be conducted, and therefore control with higher intelligence is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil and gas field development technical field, concretely is a bridge injection combined operation's electric drive liquid control grease injection system. BACKGROUND

[0002] In the development of shale gas, shale oil, tight gas, tight oil, coalbed gas and other unconventional oil and gas fields, cable pumping bridge plug perforation staged fracturing technology (referred to as bridge injection combined operation) is an irreplaceable operation process. With the implementation of large-scale development, platform industrialization is widely promoted due to its efficient and low-cost operation mode, that is, two adjacent wells or three adjacent wells on a platform are operated alternately.

[0003] In the existing one-to-three (three wells are operated alternately) or one-to-two (two wells are operated alternately) operation, the control system of the cable blowout preventer and the plug-in device required by the bridge injection combined operation is three independent subsystem devices, which are cable blowout preventer liquid control grease injection system, plug-in device control system, one-to-three or one-to-two flow distribution system.

[0004] In actual use, the existing equipment has at least the following problems in the operation site. In the narrow and crowded site of the well site, more space is occupied, there are three separate devices, more connecting pipelines, and personnel cannot operate centrally, so that intelligent control cannot be realized. SUMMARY

[0005] To solve the problems of the prior art, the utility model provides a bridge injection combined operation's electric drive liquid control grease injection system, which comprises: an electric control unit, and an electric drive high-pressure grease injection unit, an electric drive liquid control unit and a rapid pressure test unit connected with the electric control unit respectively;

[0006] The electric drive high-pressure grease injection unit is connected with the sealing grease tank, and is used for pumping sealing grease from the sealing grease tank into the grease sealing head or the multi-well blowout preventer;

[0007] The electric drive liquid control unit is connected with the oil tank, and is used for outputting hydraulic oil to the execution unit of each component of the cable blowout preventer or the execution unit of the multi-well plug-in device;

[0008] The rapid pressure test unit is connected with the oil tank, and is used for outputting the pressurized hydraulic oil to the multi-well rapid pressure test short section;

[0009] The electric control unit is used for controlling the start of each unit connected therewith.

[0010] Further, the electric control unit comprises: a power supply master control box and a control unit.

[0011] The control unit comprises a frequency converter, a PLC controller, a data acquisition unit and a control panel connected with the power supply master control box.

[0012] The frequency converter, the data acquisition unit, and the control panel are respectively connected to the PLC controller, and the PLC controller is respectively connected to the electric high-pressure grease injection unit, the electric hydraulic control unit, and the rapid pressure testing unit.

[0013] Furthermore, the electrically driven high-pressure grease injection unit includes: a first pump body, a second pump body, and a high-pressure electrically controlled switch valve group;

[0014] The first pump body, the second pump body, and the high-voltage electrically controlled switch valve group are all connected to the PLC controller;

[0015] The second pump body is connected to the sealing grease tank and is used to pressurize the sealing grease and send it into the first pump body;

[0016] The second pump body is connected to the first pump body, the second pump body is connected to the high-pressure electrically controlled switch valve group, and the high-pressure electrically controlled switch valve group is connected to the grease sealing head or the multi-wellhead blowout preventer.

[0017] Furthermore, the electro-hydraulic control unit includes: a third pump body, a first valve group, and a second valve group, which are respectively connected to the PLC controller;

[0018] The third pump body is also connected via pipeline to the actuator unit of the cable blowout preventer and the actuator unit of the multi-wellhead plugger.

[0019] The first valve group is installed on the pipeline between the third pump body and the actuator of the cable blowout preventer, and the second valve group is installed on the pipeline between the third pump body and the actuator of the multi-wellhead plugger.

[0020] Furthermore, the rapid pressure testing unit includes: a fourth pump body and a third valve group, which are respectively connected to the PLC controller;

[0021] The third pump body is connected to the fourth pump body via a pipeline, the third valve group is installed on the pipeline between the third pump body and the fourth pump body, and the fourth pump body is also connected to the multi-wellhead rapid pressure testing sub.

[0022] The beneficial effects of this utility model are:

[0023] 1. This application integrates an electrically driven high-pressure grease injection unit, an electrically driven hydraulic control unit, and a rapid pressure testing unit, all of which share a single electrical control unit and form a grease injection system. This achieves a high degree of integration of multiple systems for bridge-type injection operations, enabling centralized control and thus achieving more intelligent control.

[0024] 2. Compared with existing hydraulic grease injection systems that mainly use diesel air compressors as the air source or diesel engines as the power source, diesel engines are noisy, especially during nighttime construction, and diesel fuel consumption is high and exhaust emissions often fail to meet standards. This application uses electric drive force and electric control mode to drive and control the entire system, thereby avoiding the above problems. Attached Figure Description

[0025] Figure 1 This is a schematic diagram illustrating the principle control of the grease injection system provided by this utility model.

[0026] Figure label:

[0027] In the diagram: 1 is the electric-driven high-pressure grease injection unit, 2 is the electric-driven hydraulic control unit, 3 is the rapid pressure testing unit, 4 is the control unit, 5 is the main power control box, 6 is the first pump body, 7 is the second pump body, 8 is the third pump body, 9 is the high-pressure electric control switch valve group, 10 is the first valve group, 11 is the second valve group, 12 is the third valve group, 13 is the fourth pump body, 14 is the frequency converter, 15 is the PLC controller, 16 is the control panel, and 17 is the data acquisition unit. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figure 1 This utility model provides a bridge-jet coupled electro-hydraulic grease injection system, including: an electronic control unit, and an electro-hydraulic high-pressure grease injection unit 1, an electro-hydraulic control unit 2, and a rapid pressure testing unit 3, which are respectively connected to the software program electronic control unit;

[0030] The electrically driven high-pressure grease injection unit 1 is connected to the grease tank and is used to extract the grease from the grease tank and send it into the grease injection sealing head or the multi-wellhead blowout preventer.

[0031] The electro-hydraulic control unit 2 is connected to the oil tank and is used to output hydraulic oil to the execution units of each component of the cable blowout preventer or the execution unit of the multi-wellhead plugger.

[0032] The rapid pressure testing unit 3 is connected to the oil tank and is used to pressurize the hydraulic oil and output it to the multi-wellhead rapid pressure testing section.

[0033] The electronic control unit is used to control the startup of each unit connected to it.

[0034] In some embodiments, the electronic control unit includes: a main power control box 5 and a control unit 4;

[0035] The control unit 4 includes a frequency converter 14, a PLC controller 15, a data acquisition unit 17, and a control panel 16 connected to the main power control box 5.

[0036] The frequency converter 14, the data acquisition unit, and the control panel 16 are respectively connected to the PLC controller 15, and the PLC controller 15 is respectively connected to the electric-driven high-pressure grease injection unit 1, the electric-driven hydraulic control unit 2, and the rapid pressure testing unit 3.

[0037] The data acquisition unit is also connected to the frequency converter. It collects pressure, temperature, level, and flow information from the electric high-pressure grease injection unit and the electric hydraulic control unit, as well as motor speed information from the frequency converter. This information is then sent to the PLC controller or an external computer. The control panel includes a touchscreen display, instruments, an industrial computer, and physical knobs and buttons. The PLC control program is embedded in the industrial computer, allowing for electrical control of the electric high-pressure grease injection unit, the electric hydraulic control unit, and the rapid pressure testing unit 3 via touchscreen or physical buttons. This enables the opening and closing of the required control valves in each unit, as well as the start and stop of each pump. Furthermore, it allows for real-time matching and adjustment of the motor speed and output sealing grease pressure in the high-pressure grease injection unit, achieving a certain degree of automation.

[0038] In some embodiments, the electrically driven high-pressure grease injection unit 1 includes: a first pump body 6, a second pump body 7, and a high-pressure electrically controlled switch valve group 9;

[0039] The first pump body 6, the second pump body 7, and the high-voltage electrically controlled switch valve group 9 are all connected to the PLC controller 15;

[0040] The second pump body 7 is connected to the sealing grease tank and is used to pressurize the sealing grease and send it into the first pump body 6;

[0041] The second pump body 7 is connected to the first pump body 6, the second pump body 7 is connected to the high-pressure electrically controlled switch valve group 9, and the high-pressure electrically controlled switch valve group 9 is connected to the grease sealing head or the multi-wellhead blowout preventer.

[0042] The first pump extracts high-viscosity sealing grease from the sealing grease tank, pressurizes it, and then sends the pressurized high-viscosity sealing grease to the inlet of the second pump. The control unit then opens the high-pressure switch valve group, allowing the sealing grease to be output from the high-pressure electronically controlled switch valve group and finally input into the required cable grease sealing head and the blowout preventer of the multi-wellhead.

[0043] In some embodiments, the electro-hydraulic control unit 2 includes: a third pump body 8, a first valve group 10, and a second valve group 11, which are respectively connected to the PLC controller;

[0044] The third pump body 8 is also connected to the actuator unit of the cable blowout preventer and the actuator unit of the multi-wellhead plugger via pipeline;

[0045] The first valve group 10 is installed on the pipeline between the third pump body 8 and the execution unit of the cable blowout preventer, and the second valve group 11 is installed on the pipeline between the third pump body 8 and the execution unit of the multi-wellhead plugger.

[0046] The first valve group is a control explosion-proof solenoid valve group for each functional component of the one-to-two or one-to-three blowout preventer. The second valve group is a control explosion-proof solenoid valve group for the one-to-two or one-to-three plug-in device. After the third pump pressurizes the hydraulic oil, the control unit opens the first valve group or the second valve group and sends the pressurized hydraulic oil into the actuator units of each component of the cable blowout preventer or the actuator plug-in unit of the multi-wellhead.

[0047] In some embodiments, the rapid pressure testing unit 3 includes: a fourth pump body 13 and a third valve group 12 respectively connected to the PLC controller 15;

[0048] The third pump body 8 is connected to the fourth pump body 13 by a pipeline, the third valve group 12 is installed on the pipeline between the third pump body 8 and the fourth pump body 13, and the fourth pump body 13 is also connected to the multi-wellhead rapid pressure testing sub.

[0049] The control unit opens the third valve group (i.e., the multi-wellhead rapid pressure test explosion-proof electromagnetic control valve group), and then the control unit controls the third pump body to output high-pressure hydraulic oil to the third valve group. Then, the hydraulic oil is pressurized by the fourth pump body 3 and output to the corresponding output interface of one-to-two or one-to-three, and then output to the multi-wellhead rapid pressure test sub.

[0050] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bridge-jet coupled electro-hydraulic controlled grease injection system, characterized in that, include: An electronic control unit, and an electrically driven high-pressure grease injection unit, an electrically driven hydraulic control unit, and a rapid pressure testing unit, which are respectively connected to the electronic control unit; The electrically driven high-pressure grease injection unit is connected to the grease tank and is used to extract the grease from the grease tank and send it into the grease injection sealing head or the multi-wellhead blowout preventer. The electro-hydraulic control unit is connected to the oil tank and is used to output hydraulic oil to the execution units of each component of the cable blowout preventer or the execution unit of the multi-wellhead plugger. The rapid pressure testing unit is connected to the oil tank and is used to pressurize the hydraulic oil and output it to the multi-wellhead rapid pressure testing section. The electronic control unit is used to control the startup of each unit connected to it.

2. The bridge-jet coupled electro-hydraulic controlled grease injection system according to claim 1, characterized in that, The electrical control unit includes: a main power control box and a control unit; The control unit includes a frequency converter, a PLC controller, a data acquisition unit, and a control panel connected to the main power control box; The frequency converter, the data acquisition unit, and the control panel are respectively connected to the PLC controller, and the PLC controller is respectively connected to the electric high-pressure grease injection unit, the electric hydraulic control unit, and the rapid pressure testing unit.

3. The bridge-jet coupled electro-hydraulic controlled grease injection system according to claim 2, characterized in that, The electrically driven high-pressure grease injection unit includes: a first pump body, a second pump body, and a high-pressure electrically controlled switch valve group; The first pump body, the second pump body, and the high-voltage electrically controlled switch valve group are all connected to the PLC controller; The second pump body is connected to the sealing grease tank and is used to pressurize the sealing grease and send it into the first pump body; The second pump body is connected to the first pump body, the second pump body is connected to the high-pressure electrically controlled switch valve group, and the high-pressure electrically controlled switch valve group is connected to the grease sealing head or the multi-wellhead blowout preventer.

4. The bridge-jet coupled electro-hydraulic controlled grease injection system according to claim 2, characterized in that, The electro-hydraulic control unit includes: a third pump body, a first valve group, and a second valve group, which are respectively connected to the PLC controller; The third pump body is also connected via pipeline to the actuator unit of the cable blowout preventer and the actuator unit of the multi-wellhead plugger. The first valve group is installed on the pipeline between the third pump body and the actuator of the cable blowout preventer, and the second valve group is installed on the pipeline between the third pump body and the actuator of the multi-wellhead plugger.

5. The bridge-jet coupled electro-hydraulic controlled grease injection system according to claim 4, characterized in that, The rapid pressure testing unit includes: a fourth pump body and a third valve group, which are respectively connected to the PLC controller; The third pump body is connected to the fourth pump body via a pipeline, the third valve group is installed on the pipeline between the third pump body and the fourth pump body, and the fourth pump body is also connected to the multi-wellhead rapid pressure testing sub.

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