Low-air-pressure brake protection system of direct-current drilling machine

Abstract

The utility model relates to the technical field of direct-current drilling machines, in particular to a low-pressure brake protection system of a direct-current drilling machine, which comprises a driller room air source, the air outlet end of the driller room air source is connected with a gate valve, the air outlet end of the gate valve is connected with an air source triple piece, and the air outlet end of the air source triple piece is connected with a pressure regulating valve. According to the utility model, a driller room air source is connected to an original anti-collision system through a series of control elements, and comprises a gate valve, an air source triple piece, a pressure regulating valve, a pressure sensor, a pneumatic control valve and an electric control valve. The pressure regulating valve can regulate the pressure of an air source; the pressure sensor outputs a signal under a set pressure to control the pneumatic control valve and the electric control valve; the pneumatic control valve is automatically closed and provides mechanical protection when the pressure is insufficient; the electric control valve controls the on-off of the air path after receiving the signal to realize electric protection; the action pressure of the control valves is adjustable, and if faults occur, manual operation can be carried out to guarantee emergency operation and production safety.

Description

Technical Field

[0001] This utility model relates to the field of DC drilling rig technology, and in particular to a low air pressure braking protection system for DC drilling rigs. Background Technology

[0002] In oil drilling equipment, the winch is considered the most important of the three major components of a drilling rig. It is mainly used to control the raising and lowering of the drill string. The winch braking system is an important part of ensuring the safe operation of the drilling rig winch. Especially in deep well operations and harsh working environments, the winch braking system plays a crucial role. Therefore, it needs to have the characteristics of rapid response, strong stability, and high reliability.

[0003] Due to the application of AC variable frequency drive technology, AC drilling rigs primarily rely on energy-efficient braking in normal operation, achieving a "hovering" function through the winch motor. Mechanical disc brakes mainly intervene in emergency stops. Furthermore, because AC variable frequency systems are highly digitalized, their winch braking system protection functions are relatively comprehensive. In contrast, DC drilling rigs driven by DC speed control technology, due to their outdated technology, rely mainly on mechanical disc brakes and auxiliary braking systems for their winch braking systems. Although their braking protection functions have gradually improved over the years, they still lag behind AC drilling rigs, especially in low-pressure braking protection, which is largely limited to alarm warnings without further protection. Utility Model Content

[0004] In view of this, the present invention provides a low air pressure braking protection system for DC drilling rigs. The main technical problem to be solved is to fundamentally prevent personnel and equipment injuries caused by the failure of the winch to automatically brake due to low air pressure in DC drilling rigs. Designing a simple and reliable low air pressure braking protection system is the key to the normal operation of the DC drilling rig winch system.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a low-pressure brake protection system for a DC drilling rig, comprising an air source for the driller's cabin, a gate valve connected to the outlet of the air source, an air source triplet connected to the outlet of the gate valve, a pressure regulating valve connected to the outlet of the air source triplet, a pneumatic control valve connected to the outlet of the pressure regulating valve, an electric control valve connected to the outlet of the pneumatic control valve, an anti-collision system connected to the outlet of the electric control valve, the pressure regulating valve and the pneumatic control valve being connected via an air pipe, a pressure sensor being installed outside the air pipe between the pressure regulating valve and the pneumatic control valve, and the detection end of the pressure sensor being located inside the air pipe between the pressure regulating valve and the pneumatic control valve.

[0006] By adopting the above technical solution, the driller's room air source serves as the air supply source for the protection system. After the driller's room air source, a gate valve, an air source triplet, a pressure regulating valve, a pressure sensor, a pneumatic control valve, and an electric control valve are sequentially connected. The electric control valve is then connected to the original anti-collision system. The gate valve and air source triplet enable the switching of the protection air circuit and the air source purification function. The pressure regulating valve allows for flexible adjustment of the air source pressure between the minimum pressure and the supply pressure. A pressure sensor is connected to the pressure-regulated air circuit to output a dry contact signal for opening or closing at the set pressure value, used to control the subsequent pneumatic and electric control valves. A pneumatic control valve is connected to the outlet pipe of the pressure sensor on the pressure-regulated air circuit. When the input pressure is lower than the set value, the valve automatically closes without external force, achieving a mechanical control. The pressure detection and protection functions are achieved by connecting an electric control valve (a two-position, two-way solenoid valve) to the outlet line of the pneumatic control valve. The electric control valve receives the switch output signal from the pneumatic control valve and actuates its body to control the airflow, thus realizing electrical pressure detection and protection functions. The original anti-collision system is then connected to the outlet line of the electric control valve, controlling the hydraulic disc brake and auxiliary brake by controlling the airflow, thereby achieving low air pressure protection for the DC drilling rig winch braking system. The operating pressures of both the pneumatic and electric control valves are flexibly adjustable. In case of valve mechanism failure, the valves can be manually adjusted to a position that does not affect the airflow operation for temporary operation, ensuring the winch's emergency operation capability in case of downhole emergencies and guaranteeing production safety.

[0007] As a further description of the above technical solution: the pressure sensor is an Emerson 3051S, the pneumatic control valve is an ASCO 551, and the electric control valve is a Fisher ED.

[0008] By adopting the above technical solution, and using a pressure sensor of brand name Emerson 3051S, a pneumatic control valve of brand name ASCO 551, and an electric control valve of brand name Fisher ED, the safety of the low air pressure brake protection system of the DC drilling rig is improved by using these brand-name pressure sensors, pneumatic control valves, and electric control valves, and the reliability of the brake protection system is further improved.

[0009] As a further description of the above technical solution: the driller's room air source and the gate valve are connected by an air pipe, and a pressure gauge is installed outside the air pipe between the driller's room air source and the gate valve. The detection end of the pressure gauge is located inside the air pipe between the driller's room air source and the gate valve.

[0010] By adopting the above technical solution, a pressure gauge is installed between the air source and the gate valve in the driller's room to realize the air pressure monitoring function of the protective air circuit, laying a good foundation for the realization of subsequent functions.

[0011] As a further description of the above technical solution: the air source triplet includes a filter assembly, a steam-water separation assembly, and a lubrication assembly. The air inlet end of the filter assembly is connected to the air outlet end of the gate valve through an air pipe, and the air inlet end of the steam-water separation assembly is connected to the air outlet end of the filter assembly through an air pipe.

[0012] By adopting the above technical solutions, in the low-pressure brake protection system of DC drilling rigs, the filter component can effectively remove dust, particulate matter and other impurities from the compressed air, thereby protecting the equipment in the brake system, reducing failures caused by impurities, and ensuring stable system operation; the air-water separator component can remove moisture from the compressed air, preventing equipment from rusting and corroding, and avoiding water freezing and blocking the air passage at low temperatures, thereby improving air pressure stability, ensuring that the brake system can work normally under low-temperature conditions, and thus improving the response speed and braking effect of the brake system, ensuring the accuracy and reliability of braking operation.

[0013] As a further description of the above technical solution: the air inlet of the lubrication component is connected to the air outlet of the steam-water separation component through an air pipe, and the air outlet of the lubrication component is connected to the air inlet of the pressure regulating valve through an air pipe.

[0014] By adopting the above technical solution, in the low-pressure brake protection system of a DC drilling rig, the lubrication component forms a protective film on the surface of the brake components, reducing direct metal-to-metal contact, thereby reducing wear and extending component lifespan. It also lowers the coefficient of friction, making braking smoother and more flexible, improving braking response speed and braking effect. Furthermore, the lubrication component absorbs and carries away heat generated during braking, preventing brake components from being damaged by high temperatures and maintaining the system within its normal operating temperature range. Simultaneously, the protective layer formed by the lubricating oil or grease isolates air and moisture, preventing brake components from rusting and corroding, and maintaining their mechanical properties. The lubrication component also acts as a seal, preventing dust and impurities from entering the brake system, avoiding wear and interference with brake components, and ensuring the cleanliness and normal operation of the brake system.

[0015] By employing the above technical solution, the low air pressure braking protection system for DC drilling rigs of this utility model has at least the following beneficial effects:

[0016] 1. Compared with existing technologies, this DC drilling rig low-pressure brake protection system uses the driller's cabin air source as the air supply source for the protection system. After the driller's cabin air source, a gate valve, an air source triplet, a pressure regulating valve, a pressure sensor, a pneumatic control valve, and an electric control valve are sequentially connected. The electric control valve is then connected to the original anti-collision system. The gate valve and the air source triplet enable the switching of the protection air circuit and the air source purification function. The pressure regulating valve allows for flexible adjustment of the air source pressure between the minimum pressure and the supply pressure. A pressure sensor is connected to the pressure-regulated air circuit to output a dry contact signal for opening or closing at a set pressure value, used to control the subsequent pneumatic and electric control valves. A pneumatic control valve is connected to the outlet pipe of the pressure sensor on the pressure-regulated air circuit. When the input pressure is lower than the set value, the valve automatically closes without the need for external... The system achieves mechanical pressure detection and protection functions. An electric control valve, specifically a two-position two-way solenoid valve, is connected to the outlet pipe of the pneumatic control valve. After receiving the switch output signal from the pneumatic control valve, the electric control valve actuates, thereby controlling the opening and closing of the air circuit, achieving electrical pressure detection and protection functions. The original anti-collision system is then connected to the outlet pipe of the electric control valve. The opening and closing of the air circuit controls the action of the hydraulic disc brake and auxiliary brake, thus achieving low air pressure protection for the DC drilling rig winch braking system. The operating pressure of both the pneumatic and electric control valves can be flexibly adjusted. In case of valve mechanism failure, the valve can be manually adjusted to a position that does not affect the working state of the air circuit for temporary operation, ensuring the winch's emergency operation capability in case of emergencies downhole and ensuring production safety.

[0017] 2. Compared with existing technologies, this DC drilling rig low-pressure brake protection system improves the safety of the DC drilling rig low-pressure brake protection system and further enhances its operational reliability by using an Emerson 3051S pressure sensor, an ASCO 551 pneumatic control valve, and a Fisher ED electric control valve. The Emerson 3051S is a high-pressure resistant, explosion-proof pressure sensor, the ASCO 551 pneumatic control valve is an explosion-proof valve, and the Fisher ED electric control valve is a high-pressure regulating valve. Attached Figure Description

[0018] Figure 1 This utility model provides an overall flowchart of a low-pressure braking protection system for a DC drilling rig.

[0019] Figure 2 This utility model provides a gate valve flow chart for a low-pressure brake protection system for DC drilling rigs.

[0020] Figure 3This utility model provides a flow chart of the pressure regulating valve for a low-pressure brake protection system for a DC drilling rig.

[0021] Figure 4 This utility model provides a flow chart of the air source triplet for a low-pressure brake protection system for DC drilling rigs.

[0022] Figure 5 The present invention provides a flow chart of the pneumatic control valve for a low-pressure brake protection system for a DC drilling rig.

[0023] Legend:

[0024] 1. Air supply for the driller's room; 2. Pressure gauge; 3. Gate valve; 4. Air supply triplet; 401. Filter assembly; 402. Air-water separator assembly; 403. Lubrication assembly; 5. Pressure regulating valve; 6. Pressure sensor; 7. Pneumatic control valve; 8. Electric control valve; 9. Original anti-collision system. Detailed Implementation

[0025] Reference Figure 1-5This utility model provides a low-pressure brake protection system for a DC drilling rig, comprising: a driller's cabin air source 1; a gate valve 3 connected to the outlet of the driller's cabin air source 1, which controls the opening and closing of the protective air circuit; an air source triplet 4 connected to the outlet of the gate valve 3, which purifies the air source; a pressure regulating valve 5 connected to the outlet of the air source triplet 4, which allows for flexible adjustment of the air source pressure between the minimum pressure and the supply pressure as needed; a pressure gauge integrated on the pressure regulating valve 5, which is different from the pressure gauge 2, making pressure adjustment readily apparent; a pneumatic control valve 7 connected to the outlet of the pressure regulating valve 5, which automatically closes when the input pressure is lower than the set value, requiring no external force and achieving mechanical pressure detection and protection; and an electric control valve 8 connected to the outlet of the pneumatic control valve 7, which is a two-position, two-way solenoid valve that receives pressure from the air source. After the sensor 6 outputs a switch signal, it activates the valve body, thereby controlling the opening and closing of the air circuit. This achieves electrical pressure detection and protection functions. The outlet of the electric control valve 8 is connected to the original anti-collision system 9. The gas after passing through the pneumatic control valve 7 and the electric control valve 8 is connected to the air circuit of the original anti-collision system 9. Similar to the anti-collision protection air circuit, the opening and closing of the air circuit controls the operation of the hydraulic disc brake and auxiliary brake, thus achieving low air pressure protection for the DC drilling rig winch brake system. The pressure regulating valve 5 and the pneumatic control valve 7 are connected by an air pipe. A pressure sensor 6 is installed outside the air pipe between the pressure regulating valve 5 and the pneumatic control valve 7. The pressure sensor 6 outputs a dry contact signal to open or close at a set pressure value to control the subsequent pneumatic control valve 7 and electric control valve 8. The detection end of the pressure sensor 6 is located inside the air pipe between the pressure regulating valve 5 and the pneumatic control valve 7. The brand and model of the pressure sensor 6 is Emerson. 3051S, the pneumatic control valve 7 is an ASCO 551, the electric control valve 8 is a Fisher ED, the driller's room air source 1 and the gate valve 3 are connected by an air pipe, and a pressure gauge 2 is installed on the outside of the air pipe between the driller's room air source 1 and the gate valve 3. The pressure gauge 2 realizes air pressure monitoring, laying a good foundation for the realization of subsequent functions. The detection end of the pressure gauge 2 is located inside the air pipe between the driller's room air source 1 and the gate valve 3. The air source triple unit 4 includes a filter assembly 401, a steam-water separator assembly 402 and a lubrication assembly 403. The air inlet end of the filter assembly 401 is connected to the air outlet end of the gate valve 3 by an air pipe, the air inlet end of the steam-water separator assembly 402 is connected to the air outlet end of the filter assembly 401 by an air pipe, the air inlet end of the lubrication assembly 403 is connected to the air outlet end of the steam-water separator assembly 402 by an air pipe, and the air outlet end of the lubrication assembly 403 is connected to the air inlet end of the pressure regulating valve 5 by an air pipe.

[0026] Working Principle: An air supply line is drawn from the driller's cabin air source 1 as the air supply source for the protection system. Subsequently, pressure gauge 2, gate valve 3, and air source triplet 4 are connected sequentially to realize the on / off function of the protection air circuit, air pressure monitoring, and air source purification, laying a foundation for subsequent functions. Next, pressure regulating valve 5 is introduced, allowing flexible adjustment of the air source pressure from the minimum pressure to the supply pressure according to site requirements. The pressure regulating valve 5 has a built-in pressure gauge, making pressure adjustment clear at a glance. A pressure sensor 6 is connected to the pressure-regulated air circuit, outputting a dry contact signal to open or close at the set pressure value, used to control the subsequent pneumatic control valve 7 and electric control valve 8. The pneumatic control valve 7 automatically closes when the input pressure is lower than the set value, without external force, realizing mechanical pressure detection and protection functions. Following valve 7, an electric control valve 8, a two-position two-way solenoid valve, is connected. After receiving the switch output signal from the gas source pressure sensor 6, valve 8 actuates, controlling the opening and closing of the gas path. This achieves electrical pressure detection and protection functions. The gas passing through pneumatic control valve 7 and electric control valve 8 is connected to the anti-collision protection system gas path of the original anti-collision system 9. Similar to the anti-collision protection gas path, the opening and closing of the gas path controls the hydraulic disc brake and auxiliary brake, thus achieving low-pressure protection for the DC drilling rig winch braking system. The operating pressures of both pneumatic control valve 7 and electric control valve 8 are flexibly adjustable. In case of valve mechanism failure, they can be manually adjusted to a position that does not affect the gas path operation for temporary operation, ensuring the winch's emergency operation capability in case of downhole emergencies and guaranteeing production safety. Furthermore, it uses Emerson brand and model valves. The Emerson 3051S pressure sensor 6, the ASCO 551 pneumatic control valve 7, and the Fisher ED electric control valve 8 are all high-pressure resistant and explosion-proof. The ASCO 551 pneumatic control valve 7 is an explosion-proof valve, and the Fisher ED electric control valve 8 is a high-pressure regulating valve. By using these brand-name pressure sensors 6, pneumatic control valve 7, and electric control valve 8, the safety of the low-pressure brake protection system of the DC drilling rig is improved, and the reliability of the brake protection system is further enhanced.

[0027] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 low-pressure brake protection system for a DC drilling rig, comprising a driller's cabin air source (1), characterized in that: The air outlet of the driller's room air source (1) is connected to a gate valve (3), the air outlet of the gate valve (3) is connected to an air source triplet (4), the air outlet of the air source triplet (4) is connected to a pressure regulating valve (5), the air outlet of the pressure regulating valve (5) is connected to a pneumatic control valve (7), the air outlet of the pneumatic control valve (7) is connected to an electric control valve (8), the air outlet of the electric control valve (8) is connected to the original anti-collision system (9), the pressure regulating valve (5) and the pneumatic control valve (7) are connected by an air pipe, a pressure sensor (6) is installed outside the air pipe between the pressure regulating valve (5) and the pneumatic control valve (7), and the detection end of the pressure sensor (6) is located inside the air pipe between the pressure regulating valve (5) and the pneumatic control valve (7).

2. The low-pressure brake protection system for a DC drilling rig according to claim 1, characterized in that: The pressure sensor (6) is an Emerson 3051S, the pneumatic control valve (7) is an ASCO 551, and the electric control valve (8) is a Fisher ED.

3. The low-pressure brake protection system for a DC drilling rig according to claim 1, characterized in that: The driller's room air source (1) and the gate valve (3) are connected by an air pipe. A pressure gauge (2) is installed outside the air pipe between the driller's room air source (1) and the gate valve (3). The detection end of the pressure gauge (2) is located inside the air pipe between the driller's room air source (1) and the gate valve (3).

4. The low-pressure brake protection system for a DC drilling rig according to claim 1, characterized in that: The air source triplet (4) includes a filter assembly (401), a steam-water separation assembly (402), and a lubrication assembly (403). The air inlet of the filter assembly (401) is connected to the air outlet of the gate valve (3) through an air pipe, and the air inlet of the steam-water separation assembly (402) is connected to the air outlet of the filter assembly (401) through an air pipe.

5. The low-pressure brake protection system for a DC drilling rig according to claim 4, characterized in that: The air inlet of the lubrication assembly (403) is connected to the air outlet of the steam-water separation assembly (402) via an air pipe, and the air outlet of the lubrication assembly (403) is connected to the air inlet of the pressure regulating valve (5) via an air pipe.

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