Gas supply system for lifting the roof of cementing equipment in oil fields

Abstract

This utility model relates to the technical field of oil drilling and production equipment, and discloses a pneumatic system for lifting the roof of oilfield cementing equipment. It includes a roof cylinder and a pressure reducing valve connected to an air supply source via an air inlet. The outlet of the pressure reducing valve is connected to the inlet of an electromagnetic directional valve via an air pipe. The first and second outlets of the electromagnetic directional valve are respectively connected to the inlets of a first and second speed control valve. The outlet of the first speed control valve is connected to the inlet of a pneumatically controlled check valve, and the outlet of the second speed control valve is connected to the feedback port of the pneumatically controlled check valve. The outlet of the pneumatically controlled check valve is connected to the rodless chamber inlet of the roof cylinder, and the feedback port of the pneumatically controlled check valve is connected to the rod chamber inlet of the roof cylinder. This utility model's pneumatic system for lifting the roof of oilfield cementing equipment indirectly controls the lifting of the roof by controlling the extension and retraction of the roof cylinder through the electromagnetic directional valve. It has good performance and a simple control method.

Description

Technical Field

[0001] This utility model relates to the field of oil drilling and production equipment technology, specifically to a gas path system for lifting the roof of oilfield cementing equipment. Background Technology

[0002] Oilfield cementing equipment operates in harsh environments, especially in high-temperature areas, requiring high-temperature protection for the equipment. Pneumatic canopies are used to support the equipment and personnel during operations, protecting them from the effects of severe weather. Traditionally, the canopy is manually raised before equipment operation and lowered manually after completion. The weight of the canopy increases the workload for workers. Therefore, a pneumatic system capable of rapidly controlling the raising and lowering of the canopy is needed to reduce worker workload and ensure simple and reliable operation. Summary of the Invention

[0003] The purpose of this utility model is to address the shortcomings of the above-mentioned technology by providing a pneumatic system for lifting the roof of oilfield cementing equipment. The system indirectly controls the lifting of the roof by controlling the extension and retraction of the roof cylinder through an electromagnetic reversing valve. It has good performance and simple control method.

[0004] To achieve the above objectives, the present invention provides an air circuit system for lifting the roof of oilfield cementing equipment, including a roof cylinder and a pressure reducing valve connected to an air supply source via an air inlet. The outlet of the pressure reducing valve is connected to the inlet of an electromagnetic reversing valve via an air pipe. The first and second outlets of the electromagnetic reversing valve are respectively connected to the inlets of a first and second speed control valve. The outlet of the first speed control valve is connected to the inlet of a pneumatically controlled check valve. The outlet of the second speed control valve is connected to the feedback port of the pneumatically controlled check valve. The outlet of the pneumatically controlled check valve is connected to the rodless chamber inlet of the roof cylinder, and the feedback port of the pneumatically controlled check valve is connected to the rod chamber inlet of the roof cylinder.

[0005] Preferably, the electromagnetic directional valve is a three-position four-way neutral-position Y-type directional valve.

[0006] Preferably, the pressure reducing valve is an adjustable overflow type pressure reducing valve.

[0007] Preferably, both the first speed control valve and the second speed control valve include a throttle valve and a check valve.

[0008] Preferably, the pneumatically controlled one-way valve is connected to the ceiling cylinder via an air pipe, allowing the ceiling cylinder to stop at any position.

[0009] Preferably, the set pressure of the pressure reducing valve is determined by the weight of the ceiling driven by the ceiling cylinder.

[0010] Compared with the prior art, this utility model has the following advantages:

[0011] 1. The extension and retraction of the ceiling cylinder is controlled by an electromagnetic reversing valve, which indirectly controls the lifting of the ceiling.

[0012] 2. The use of a pneumatically controlled one-way valve ensures the smoothness and safety of the ceiling's raising and lowering;

[0013] 3. It can be operated by a single person, reducing manpower input, improving work efficiency, and realizing the electrical automation control of the ceiling lifting;

[0014] 4. Simple structure, saving time and effort, easy maintenance, and reducing production costs;

[0015] 5. It has good performance and can work in harsh environments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the gas path system for lifting the roof of oilfield cementing equipment according to this utility model.

[0017] The components in the diagram are labeled as follows:

[0018] Ceiling cylinder 1, rodless chamber air inlet 1a, rod chamber air inlet 1b, pressure reducing valve 2, air inlet 2a, air outlet 2b, air pipe 3, solenoid reversing valve 4, air inlet 4a, air outlet 4b, air outlet 4c, exhaust port 4d, first speed control valve 5, air inlet 5a, air outlet 5b, second speed control valve 6, air inlet 6a, air outlet 6b, pneumatic check valve 7, air inlet 7a, feedback port 7b, air outlet 7c. Detailed Implementation

[0019] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] like Figure 1As shown, a pneumatic system for lifting the roof of oilfield cementing equipment includes a roof cylinder 1 and a pressure reducing valve 2 connected to an air supply source via an air inlet 2a. The air outlet 2b of the pressure reducing valve 2 is connected to the air inlet 4a of an electromagnetic reversing valve 4 via an air pipe 3. The air outlets 4b and 4c of the electromagnetic reversing valve 4 are respectively connected to the air inlet 5a of a first speed control valve 5 and the air inlet 6a of a second speed control valve 6. The air outlet 5b of the first speed control valve 5 is connected to the air inlet 7a of a pneumatically controlled check valve 7. The air outlet 6b of the second speed control valve 6 is connected to the feedback port 7b of the pneumatically controlled check valve 7. The air outlet 7c of the pneumatically controlled check valve 7 is connected to the rodless chamber air inlet 1a of the roof cylinder 1, and the feedback port 7b of the pneumatically controlled check valve 7 is connected to the rod chamber air inlet 1b of the roof cylinder 1.

[0021] In this embodiment, the electromagnetic directional valve 4 is a three-position four-way neutral-position Y-type directional valve, the pressure reducing valve 2 is an adjustable overflow type pressure reducing valve, and both the first speed control valve 5 and the second speed control valve 6 include a throttle valve and a check valve. Furthermore, the pneumatically controlled check valve 7 is connected to the ceiling cylinder 1 via an air pipe 3. The set pressure of the pressure reducing valve 2 is determined by the weight of the ceiling driven by the ceiling cylinder 1, allowing the ceiling cylinder 1 to stop at any position.

[0022] The working principle of this embodiment is as follows: after the air supply source is started, compressed air enters the air inlet 2a of the pressure reducing valve 2, and the compressed air after pressure reduction is discharged from the pressure reducing valve 2 and enters the air inlet 4a of the electromagnetic reversing valve 4 through the air pipe 3.

[0023] Specifically:

[0024] When the electromagnet on the left side of the solenoid directional valve 4 is energized, the air inlet 4a and outlet 4b of the solenoid directional valve 4 are connected. Compressed air passes through the air inlet 4a to the outlet 4b, then through the air pipe 3 into the air inlet 6a of the second speed control valve 6. It is discharged from the outlet 6b through the one-way valve inside the second speed control valve 6, and then splits into two paths. One path goes to the feedback port 7b of the pneumatic one-way valve 7, which opens the pneumatic one-way valve 7 in the reverse direction through pressure. The other path goes to the rod chamber air inlet 1b of the ceiling cylinder 1, driving the ceiling cylinder 1 to descend. At the same time, the ceiling cylinder... The gas in the rodless chamber passes through the rodless chamber inlet 1a and the air pipe 3 to the outlet 7c of the pneumatic control check valve 7. Compressed air flows out through the outlet 7c of the pneumatic control check valve 7 to the inlet 7a. It is connected to the outlet 5b of the first speed control valve 5 through the air pipe 3. The flow rate of the incoming air can be controlled by the throttle valve of the first speed control valve 5, thereby adjusting the descent speed of the ceiling cylinder 1. The inlet 5a of the first speed control valve 5 is connected to the outlet 4c of the solenoid reversing valve 4, and then the gas is discharged through the exhaust port 4d.

[0025] When the electromagnet on the right side of the solenoid directional valve 4 is energized, the air inlet 4a and the air outlet 4c of the solenoid directional valve 4 are connected. Compressed air passes through the air inlet 4a to the air outlet 4c, then through the air pipe 3 into the air inlet 5a of the first speed control valve 5. It is discharged from the air outlet 5b through the one-way valve inside the first speed control valve 5, and then through the air pipe 3 to the air inlet 7a of the pneumatic one-way valve 7, opening the pneumatic one-way valve 7 in the forward direction. The compressed air then passes through the air outlet 7c of the pneumatic one-way valve 7 to the ceiling cylinder. The rodless chamber air inlet 1a drives the ceiling cylinder 1 to rise. At the same time, the gas in the rod chamber of the ceiling cylinder 1 passes through the rod chamber air inlet 1b and the air pipe 3 to the outlet 6b of the second speed control valve 6. The flow rate of the incoming air can be controlled by the throttle valve of the second speed control valve 6, thereby adjusting the rising speed of the ceiling cylinder 1. The air inlet 6a of the second speed control valve 6 is connected to the outlet 4b of the solenoid reversing valve 4, and then the gas is discharged through the exhaust port 4d.

[0026] When the solenoid valve 4 is not in the middle position and the electromagnet is not energized, the air inlet 4a of the solenoid valve 4 is closed, and the air pressure from the pressure reducing valve 2 is released through the internal overflow valve. At the same time, the gas in the rod chamber of the ceiling cylinder 1 is released through the second speed control valve 6 and the air outlet 4b of the solenoid valve 4 to the exhaust port 4d. The gas in the rodless chamber of the ceiling cylinder 1 is in a pressure-holding state due to the action of the pneumatic check valve 7. At this time, the ceiling cylinder 1 is locked to prevent the ceiling from falling on its own due to gravity.

[0027] This utility model is a pneumatic system for lifting the roof of oilfield cementing equipment. It indirectly controls the lifting of the roof by controlling the extension and retraction of the roof cylinder 1 through an electromagnetic reversing valve 4. A pneumatically controlled one-way valve 7 ensures the smoothness and safety of roof lifting. It allows for single-person operation, reducing manpower input, improving work efficiency, and realizing electrical automation control of roof lifting. It has a simple structure, saves time and labor, is easy to maintain, and reduces production costs. It performs well and can operate in harsh environments.

[0028] It should be noted that the above description of the technical solutions is exemplary, and this specification may be embodied in different forms and should not be construed as limiting it to the technical solutions set forth herein. Rather, providing these descriptions will ensure that the disclosure of this utility model is thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Furthermore, the technical solutions of this utility model are defined only by the scope of the claims.

[0029] The aspects disclosed in this specification and claims are merely examples, and therefore, this specification and claims are not limited to the details shown. In the foregoing description, detailed descriptions of relevant known functions or configurations have been omitted where it would unnecessarily obscure the focus of this specification and claims.

[0030] Finally, it should be noted that the above content is a further detailed description of the utility model in conjunction with specific embodiments. It should not be considered that the specific implementation of this utility model is limited to these descriptions. For those skilled in the art, any simple substitutions made without departing from the concept of this utility model should be considered within the protection scope of this utility model. The above embodiments are merely representative examples of this utility model. Obviously, this utility model is not limited to the above embodiments and can have many variations. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model should be considered within the protection scope of this utility model.

Claims

1. A pneumatic system for lifting the roof of cementing equipment in oilfields, comprising a roof cylinder (1), characterized in that: It also includes a pressure reducing valve (2) connected to an air supply source via an air inlet 2a. The air outlet 2b of the pressure reducing valve (2) is connected to the air inlet 4a of an electromagnetic reversing valve (4) via an air pipe (3). The air outlet 4b and air outlet 4c of the electromagnetic reversing valve (4) are respectively connected to the air inlet 5a of a first speed control valve (5) and the air inlet 6a of a second speed control valve (6). The air outlet 5b of the first speed control valve (5) is connected to the air inlet 7a of a pneumatic check valve (7). The air outlet 6b of the second speed control valve (6) is connected to the feedback port 7b of the pneumatic check valve (7). The air outlet 7c of the pneumatic check valve (7) is connected to the rodless chamber air inlet 1a of the ceiling cylinder (1). The feedback port 7b of the pneumatic check valve (7) is connected to the rod chamber air inlet 1b of the ceiling cylinder (1).

2. The gas path system for lifting the roof of oilfield cementing equipment according to claim 1, characterized in that: The electromagnetic directional valve (4) is a three-position four-way neutral Y-type directional valve.

3. The gas path system for lifting the roof of oilfield cementing equipment according to claim 1, characterized in that: The pressure reducing valve (2) is an adjustable overflow type pressure reducing valve.

4. The gas path system for lifting the roof of oilfield cementing equipment according to claim 1, characterized in that: Both the first speed control valve (5) and the second speed control valve (6) include a throttle valve and a check valve.

5. The gas path system for lifting the roof of oilfield cementing equipment according to claim 1, characterized in that: The pneumatic one-way valve (7) is connected to the roof cylinder (1) via an air pipe (3).

6. The gas path system for lifting the roof of oilfield cementing equipment according to claim 1, characterized in that: The set pressure of the pressure reducing valve (2) is determined by the weight of the ceiling driven by the ceiling cylinder (1).

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