Sealing grease pressurizing system

Abstract

The utility model discloses a sealing grease pressurizing system. The sealing grease pressurizing system comprises a controller and a sealing grease conveying pump system. The sealing grease delivery pump system comprises a high-viscosity pump and a pressure pump; the input end of the high-viscosity pump is connected with the sealing grease tank, and the output end of the high-viscosity pump is connected with the input end of the pressure pump; the output end of the pressure pump is connected with the sealing part of the blowout preventer; and a controller is respectively connected with the high-viscosity pump and the pressure pump. The sealing grease with high viscosity is pumped out of the oil tank in which the sealing grease is stored through the high-viscosity pump, and after the high-viscosity pump and the pressure pump are pressurized through the pressure pump, the sealing grease with high viscosity pumped out by the high-viscosity pump can be pumped into a corresponding sealing part in complete equipment of the blowout prevention device after being pressurized; therefore, the problem that in the prior art, a pneumatic booster pump is adopted as a grease injection pump, and a corresponding air compressor and a matched air path control part need to be arranged for use of the pneumatic booster pump, so that the size of the whole system is large is solved.

Description

Technical Field

[0001] The present application relates to a sealing grease pressurizing system, and belongs to the field of sealing grease pumping in a blowout prevention device of well control equipment in oilfield operations. Background Art

[0002] In the cable and steel wire operation in oil and gas fields, the cable and steel wire blowout prevention device is the most important and necessary safety equipment for production operations, among which the hydraulically controlled grease injection system is the key core control component in the complete set of blowout prevention equipment. The sealing grease used in the grease injection system has a relatively high viscosity, and the existing grease injection pump uses a pneumatic booster pump to deliver the viscous sealing grease into the corresponding sealing parts at high pressure. However, the defect of using a pneumatic booster pump is that the pneumatic booster pump needs to be equipped with an air compressor to provide an air source for the grease injection pump, and a corresponding air circuit valve as a control element, which leads to the problem of large system volume. Utility Model Content

[0003] According to one aspect of the present application, a sealing grease pressurization system is provided to solve the problem that the grease injection pump in the prior art uses a pneumatic booster pump, and the use of the pneumatic booster pump must be equipped with a corresponding air compressor and a matching air circuit control part, resulting in a large volume of the entire system. The specific solution is:

[0004] A sealing grease pressurizing system comprises a controller and a sealing grease delivery pump system;

[0005] The sealing grease delivery pump system includes a high viscosity pump and a pressure pump;

[0006] The input end of the high viscosity pump is connected to the sealing grease tank, and the output end of the high viscosity pump is connected to the input end of the booster pump;

[0007] The output end of the booster pump is connected to the sealing part of the blowout prevention device;

[0008] The controller is connected to the high viscosity pump and the pressure pump respectively.

[0009] Preferably, an explosion-proof electric needle valve is provided at the output end of the booster pump;

[0010] The explosion-proof electric needle valve is connected to the controller.

[0011] Preferably, the delivery pressure of the booster pump is greater than 50 MPa.

[0012] Preferably, the delivery pressure of the high viscosity pump is less than 1 MPa.

[0013] Preferably, the high viscosity pump is an inner rotor pump;

[0014] The booster pump is a high-pressure plunger pump.

[0015] Preferably, the driving motors of the inner rotor pump and the high-pressure plunger pump are respectively explosion-proof motors.

[0016] Preferably, the explosion-proof motor is a variable frequency motor.

[0017] The beneficial effects of this application include:

[0018] The present application uses the high-viscosity pump provided to extract the high-viscosity sealing grease from the oil tank storing the sealing grease. The high-viscosity pump and the pressure pump can pressurize the high-viscosity sealing grease pumped out by the high-viscosity pump and then pump it into the corresponding sealing part of the blowout prevention device complete set of equipment, thereby avoiding the use of a pneumatic booster pump for the grease injection pump in the prior art, and the use of the pneumatic booster pump must be equipped with a corresponding air compressor and a matching air circuit control part, resulting in a large volume of the entire system;

[0019] The present application arranges an explosion-proof electric needle valve at the output end of a pressure pump to control the flow rate and pressure of sealing grease pumped into a corresponding sealing part of a complete set of blowout prevention equipment;

[0020] The present application realizes remote control by setting up a controller, which is electrically connected to the explosion-proof electric needle valve, the high viscosity pump and the pressure pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural schematic diagram of a sealing grease pressurization system for this application.

[0022] List of parts and reference numerals:

[0023] 1. High-pressure plunger pump; 2. Inner rotor pump; 3. Explosion-proof electric needle valve; 4. First delivery pipeline; 5. Second delivery pipeline. DETAILED DESCRIPTION

[0024] The present application is described in detail below with reference to embodiments, but the present application is not limited to these embodiments.

[0025] As attached Figure 1 A sealing grease pressurizing system shown includes a sealing grease delivery pump system for pumping sealing grease in a sealing grease container into corresponding sealing parts of a blowout prevention device complete set, a controller for controlling the sealing grease delivery pump system, and an explosion-proof electric needle valve arranged at the output end of the sealing grease delivery pump system;

[0026] The output pressure of the high viscosity pump is less than the output pressure of the booster pump;

[0027] The sealing grease delivery pump system comprises: a high viscosity pump for extracting the sealing grease from the oil tank, a pressure pump for pumping the sealing grease with poor fluidity extracted by the high viscosity pump into the corresponding sealing parts of the blowout prevention device complete set of equipment through pressure, and a delivery pipeline connecting various components;

[0028] The high viscosity pump is connected to the storage tank of the sealing grease through a delivery pipeline, and the first delivery pipeline of the high viscosity pump is connected to the pressure pump;

[0029] The pressure pump pressurizes the sealing grease pumped out by the high-viscosity pump through the second delivery pipeline and then pumps it into the corresponding sealing position in the blowout prevention device complete set of equipment.

[0030] The explosion-proof electric needle valve is installed on the second delivery pipeline.

[0031] It should be noted that:

[0032] In the present application, the first delivery pipeline 4 located between the high viscosity pump and the pressure pump, and the second delivery pipeline 5 located at the output end of the pressure pump are both high-pressure pipelines;

[0033] The high viscosity pump can be any pump body suitable for high viscosity sealing grease. In one embodiment of the present application, the high viscosity pump uses an inner rotor pump 2, and the pressure pump uses a high pressure plunger pump 1;

[0034] In order to save electricity, in one embodiment of the present application, the driving motors of the inner rotor pump and the high-pressure plunger pump are variable frequency explosion-proof motors, which are used to adjust the electricity consumption according to the pressure and flow rate of the sealing grease, thereby saving electricity;

[0035] The inner rotor pump and high-pressure plunger pump use explosion-proof motors to meet the requirements of oil field operations.

[0036] In this application, the explosion-proof electric needle valve 3 adopts but is not limited to various types of high-pressure valves as sealing grease control valves;

[0037] The driving motors of the inner rotor pump and the booster pump, and the explosion-proof electric needle valve 3 are respectively electrically connected to the controller to achieve remote control.

[0038] The specification or model of the controller is: PLC FX3SA-20MR-CM;

[0039] Since the sealing grease is stored in the oil tank and has poor fluidity, the sealing grease is first pumped out of the oil tank through the inner rotor pump to give the inner rotor pump an appropriate output pressure of less than 1MPa; then the high-pressure plunger pump is used to increase the pressure to ensure that the final output pressure is greater than 50MPa, so as to smoothly pump the sealing grease into the corresponding sealing parts of the blowout prevention device complete set of equipment.

[0040] The above are only a few embodiments of the present application and do not constitute any form of limitation to the present application. Although the present application is disclosed as above with preferred embodiments, it is not intended to limit the present application. Any technician familiar with the profession, without departing from the scope of the technical solution of the present application, using the technical content disclosed above to make slight changes or modifications are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. A sealing grease pressurizing system, characterized in that: Includes controller and sealing grease delivery pump system; The sealing grease delivery pump system includes a high viscosity pump and a pressure pump; The input end of the high viscosity pump is connected to the sealing grease tank, and the output end of the high viscosity pump is connected to the input end of the booster pump; The output end of the booster pump is connected to the sealing part of the blowout prevention device; The controller is connected to the high viscosity pump and the pressure pump respectively.

2. A sealing grease pressurizing system according to claim 1, characterized in that: The output end of the booster pump is provided with an explosion-proof electric needle valve; The explosion-proof electric needle valve is connected to the controller.

3. A sealing grease pressurizing system according to claim 1, characterized in that: The delivery pressure of the booster pump is greater than 50 MPa.

4. A sealing grease pressurizing system according to claim 1, characterized in that: The delivery pressure of the high viscosity pump is less than 1 MPa.

5. A sealing grease pressurizing system according to claim 1, characterized in that: The high viscosity pump is an inner rotor pump; the pressure pump is a high pressure plunger pump.

6. A sealing grease pressurizing system according to claim 5, characterized in that: The driving motors of the inner rotor pump and the high-pressure plunger pump are respectively explosion-proof motors.

7. A sealing grease pressurizing system according to claim 6, characterized in that: The explosion-proof motor is a variable frequency motor.

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