Gas path system for lifting ceiling of well cementation equipment in oil field

Abstract

The invention relates to the technical field of petroleum drilling and production construction equipment, and discloses a gas circuit system for ceiling lifting of oil field well cementation equipment, which comprises a ceiling cylinder and a pressure reducing valve with a gas inlet connected with a gas supply source, and a gas outlet of the pressure reducing valve is connected with a gas inlet of an electromagnetic reversing valve through a gas pipe. A first air outlet and a second air outlet of the electromagnetic reversing valve are connected with an air inlet of a first speed control valve and an air inlet of a second speed control valve respectively, an air outlet of the first speed control valve is connected with an air inlet of a pneumatic control one-way valve, and an air outlet of the second speed control valve is connected with a feedback port of the pneumatic control one-way valve. An air outlet of the pneumatic control one-way valve is connected with a rodless cavity air inlet of the ceiling air cylinder, and a feedback port of the pneumatic control one-way valve is connected with a rod cavity air inlet of the ceiling air cylinder. According to the gas path system for lifting the ceiling of the well cementation equipment in the oil field, stretching and retracting of the ceiling air cylinder are controlled through the electromagnetic directional valve, lifting of the ceiling is indirectly controlled, the using effect is good, and the control mode is simple.

Description

Technical Field

[0001] The invention relates to the technical field of oil drilling and production construction equipment, and in particular to an air circuit system for lifting the ceiling of oilfield cementing equipment. Background Art

[0002] The working environment of oilfield cementing construction equipment is harsh, especially in high temperature areas, which requires high temperature protection performance of the equipment. The function of the pneumatic ceiling is to prop up the ceiling during construction to prevent the impact of bad weather on the equipment and personnel in the shed. Generally, the ceiling is lifted manually before the equipment is started, and lowered by manual operation after the construction is completed. Since the ceiling is heavy, it increases the burden on the workers. Therefore, it is necessary to design an air circuit system that can quickly control the lifting and lowering of the ceiling, reduce the burden on workers, and enable simple and reliable operation and operation. Summary of the invention

[0003] The purpose of the present invention is to address the deficiencies of the above-mentioned technology and to provide an air circuit system for lifting the ceiling of oilfield cementing equipment. The extension and retraction of the ceiling cylinder is controlled by an electromagnetic reversing valve, thereby indirectly controlling the lifting of the ceiling. The system has good use effect and simple control method.

[0004] To achieve the above-mentioned purpose, the air circuit system designed by the present invention for lifting the ceiling of oilfield cementing equipment includes a ceiling cylinder and a pressure reducing valve whose air inlet is connected to an air supply source, the air outlet of the pressure reducing valve is connected to the air inlet of an electromagnetic reversing valve through an air pipe, the first air outlet and the second air outlet of the electromagnetic reversing valve are respectively connected to the air inlet of a first speed control valve and the air inlet of a second speed control valve, the air outlet of the first speed control valve is connected to the air inlet of an air-controlled one-way valve, the air outlet of the second speed control valve is connected to the feedback port of the air-controlled one-way valve, the air outlet of the air-controlled one-way valve is connected to the rodless chamber air inlet of the ceiling cylinder, and the feedback port of the air-controlled one-way valve is connected to the rod chamber air inlet of the ceiling cylinder.

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

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

[0007] Preferably, the first speed control valve and the second speed control valve each include a throttle valve and a one-way valve.

[0008] Preferably, the air-controlled one-way valve is connected to the ceiling cylinder via an air pipe to achieve stopping of the ceiling cylinder 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, the present invention has the following advantages:

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

[0012] 2. The use of pneumatic one-way valve ensures the smooth and safe lifting of the ceiling;

[0013] 3. It can be operated by one person, which reduces manpower input, improves work efficiency, and realizes electrical automation control of ceiling lifting;

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

[0015] 5. Good use effect and can work in harsh environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a schematic structural diagram of the gas circuit system for lifting the ceiling of oilfield cementing equipment.

[0017] The components in the figure are numbered 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, air-controlled one-way valve 7, air inlet 7a, feedback port 7b, air outlet 7c. DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of invention protection.

[0020] like Figure 1As shown, an air circuit system for lifting the ceiling of oilfield cementing equipment includes a ceiling cylinder 1, and also includes a pressure reducing valve 2 whose air inlet 2a is connected to an air supply source, the air outlet 2b of the pressure reducing valve 2 is connected to the air inlet 4a of the electromagnetic reversing valve 4 through an air pipe 3, the air outlet 4b and the air outlet 4c of the electromagnetic reversing valve 4 are respectively connected to the air inlet 5a of the first speed control valve 5 and the air inlet 6a of the second speed control valve 6, the air outlet 5b of the first speed control valve 5 is connected to the air inlet 7a of the air-controlled one-way valve 7, the air outlet 6b of the second speed control valve 6 is connected to the feedback port 7b of the air-controlled one-way valve 7, the air outlet 7c of the air-controlled one-way valve 7 is connected to the rodless chamber air inlet 1a of the ceiling cylinder 1, and the feedback port 7b of the air-controlled one-way valve 7 is connected to the rod chamber air inlet 1b of the ceiling cylinder 1.

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

[0022] The working principle of this embodiment is: after the air supply source is started, the compressed air enters the air inlet 2a of the pressure reducing valve 2, and the compressed air after decompression 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 electromagnetic reversing valve 4 is energized, the air inlet 4a and the air outlet 4b of the electromagnetic reversing valve 4 are connected, and the compressed air passes through the air inlet 4a to the air outlet 4b, and then passes through the air pipe 3 to enter the air inlet 6a of the second speed control valve 6, and is discharged from the air outlet 6b through the one-way valve in the second speed control valve 6, and then is divided into two paths, one to the feedback port 7b of the air-controlled one-way valve 7, and the air-controlled one-way valve 7 is opened in the reverse direction by pressure, and the other to the rod chamber air inlet 1b of the ceiling cylinder 1, driving the ceiling cylinder 1 to descend, and at the same time the ceiling cylinder The gas in the rodless chamber passes through the rodless chamber air inlet 1a and the air pipe 3 to the air outlet 7c of the air-controlled one-way valve 7. The compressed air flows out to the air inlet 7a through the air outlet 7c of the air-controlled one-way valve 7, and is connected to the air outlet 5b of the first speed control valve 5 through the air pipe 3. The throttle valve of the first speed control valve 5 can control the incoming air flow, thereby realizing the adjustment of the descending speed of the ceiling cylinder 1. The air inlet 5a of the first speed control valve 5 is connected to the air outlet 4c of the electromagnetic reversing valve 4, and then the gas is discharged through the exhaust port 4d.

[0025] When the electromagnet on the right side of the electromagnetic reversing valve 4 is energized, the air inlet 4a and the air outlet 4c of the electromagnetic reversing valve 4 are connected, and the compressed air passes through the air inlet 4a to the air outlet 4c, and then passes through the air pipe 3 to the air inlet 5a of the first speed control valve 5, and is discharged from the air outlet 5b through the one-way valve in the first speed control valve 5, and then passes through the air pipe 3 to the air inlet 7a of the air-controlled one-way valve 7, and the air-controlled one-way valve 7 is opened in the positive direction, and the compressed air passes through the air outlet 7c of the air-controlled one-way valve 7 to the ceiling cylinder. 1's rodless chamber air inlet 1a drives the ceiling cylinder 1 to rise, and 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 air outlet 6b of the second speed control valve 6, and the throttle valve of the second speed control valve 6 can control the incoming air flow, thereby realizing the adjustment of the rising speed of the ceiling cylinder 1, the air inlet 6a of the second speed control valve 6 is connected to the air outlet 4b of the electromagnetic reversing valve 4, and then the gas is discharged through the exhaust port 4d.

[0026] When the solenoid of the electromagnetic reversing valve 4 is not electrically located at the middle position, the air inlet 4a of the electromagnetic reversing valve 4 is closed, and the air pressure from the pressure reducing valve 2 is discharged through the internal overflow valve. At the same time, the gas in the rod chamber of the ceiling cylinder 1 is discharged through the second speed control valve 6 and the air outlet 4b of the electromagnetic reversing valve 4 to the exhaust port 4d. The gas in the rodless chamber of the ceiling cylinder 1 is in a pressure-maintaining state due to the action of the air-controlled one-way valve 7. At this time, the ceiling cylinder 1 is locked to prevent the ceiling from falling automatically due to gravity.

[0027] The present invention is used in the gas circuit system for lifting the ceiling of oilfield cementing equipment. The extension and contraction of the ceiling cylinder 1 is controlled by the electromagnetic reversing valve 4, thereby indirectly controlling the lifting of the ceiling. The gas-controlled one-way valve 7 is adopted to ensure the smooth and safe lifting of the ceiling. It can be operated by one person, which reduces manpower input, improves work efficiency, and realizes electrical automation control of the ceiling lifting. It has a simple structure, saves time and effort, is simple to maintain, and reduces production costs. It has a good use effect and can work in harsh environments.

[0028] It should be noted that the description of the above technical solutions is exemplary, and this specification can be embodied in different forms and should not be interpreted as being limited to the technical solutions set forth herein. On the contrary, providing these descriptions will make the disclosure of the present invention thorough and complete, and will fully convey the scope disclosed in this specification to those skilled in the art. In addition, the technical solutions of the present invention are limited only by the scope of the claims.

[0029] The various aspects disclosed for describing the present specification and claims are merely examples, and therefore, the present specification and claims are not limited to the details shown. In the above description, when the detailed description of the related known functions or configurations is determined to be unnecessary to obscure the focus of the present specification and claims, the detailed description will be omitted.

[0030] Finally, it should be pointed out that the above content is a further detailed description of the invention in combination with specific implementation methods. It cannot be considered that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, simple replacements made without departing from the concept of the present invention should be regarded as belonging to the protection scope of the present invention. The above embodiments are only more representative examples of the present invention. Obviously, the present invention is not limited to the above embodiments, and there can be many variations. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention should be considered to belong to the protection scope of the present invention.

Claims

1. An air circuit system for lifting the ceiling of oilfield cementing equipment, comprising a ceiling cylinder (1), characterized in that: The invention also comprises a pressure reducing valve (2) whose air inlet (2a) is connected to an air supply source, wherein the air outlet (2b) of the pressure reducing valve (2) is connected to the air inlet (4a) of an electromagnetic reversing valve (4) through an air pipe (3), and the air outlet (4b) and the 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), wherein the air outlet (4b) and the air outlet (4c) of the first speed control valve (5) are 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 port (5b) is connected to the air inlet (7a) of the air-controlled one-way valve (7), the air outlet (6b) of the second speed control valve (6) is connected to the feedback port (7b) of the air-controlled one-way valve (7), the air outlet (7c) of the air-controlled one-way valve (7) is connected to the rodless chamber air inlet (1a) of the ceiling cylinder (1), and the feedback port (7b) of the air-controlled one-way valve (7) is connected to the rod chamber air inlet (1b) of the ceiling cylinder (1).

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

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

4. The gas circuit system for lifting the ceiling of oilfield cementing equipment according to claim 1 is characterized in that: The first speed control valve (5) and the second speed control valve (6) both comprise a throttle valve and a one-way valve.

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

6. The gas circuit system for lifting the ceiling of oilfield cementing equipment according to claim 1 is 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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