[Abstract] The oil collection point is a relatively important production post in the process of gathering and transportation. It is mainly responsible for the single well drawing oil, the extraction well oil and the landing oil recovery task. As the oilfield is further developed, it is necessary to implement each block. Nissan oil quantity, which requires the oil collection point to measure the recovered slop oil, but the sub-tank measurement requires the post employee to enter the valve pool for the reverse process operation. This work has great risks, especially in the valve pool. The space is small, there are many pipelines, there are safety risks such as slipping, tripping, suffocation, falling, etc., and the labor intensity of the staff is increased. This requires developing a switch that can be realized on the ground without going into the valve pool. A device for the target valve in the valve pool to solve these problems.
[Keywords] sub-tank metering, remote control.
CLC number: TP872 Document code: A Article ID: 1009-914X(2018)37-0365-01
I. Overview The oil collection point of a joint station of a certain oil production plant was built in 1987. It was upgraded and rebuilt in 2009, mainly responsible for the single well drawing oil in the western block of the plant, pulling the well to pull oil and landing the oil. Recycling work, and transported to the gathering and transportation processing system through the external pump. After the refueling point is rebuilt, there are two oil collection tanks, one sewage treatment recovery tank, four sewage oil recovery pumps, and the daily oil collection process is single well. After the oil pulled back by the tanker is weighed by the ground scale, the oil in the tanker is discharged into the oil collection tank, and the water discharge analyzer is installed at the discharge port, and the oil is discharged from the beginning to the end of the oil discharge. The water content analysis measures the average water content of each tanker. After the empty tanker is weighed by the scale, the total liquid volume is calculated. The total liquid volume and the average water content of each tanker are used to calculate the oil quantity per tank. The crude oil in the tank is sent to the collecting and dewatering system in the station through the oil collecting pump at the oil collecting point for dehydration treatment, and a mass flow meter is installed at the outlet of the oil pump to the dewatering system in the station for measuring the oil collecting point and the external dewatering system. The amount of oil. In the actual production operation, the human-induced interference factor of the water-containing analyzer is large, and the error of the water-containing analysis probe itself of the oil-receiving tank mouth leads to the calculation of the calculated oil-receiving amount and the mass flow meter measurement by the water-containing analyzer. There is a certain difference in the amount of oil. In 2014, as the community blocks were gradually developed and put into production, the higher authorities requested to clarify the oil production per block. For this purpose, the oil collection point was required to carry out the oil transfer, and the mass flow meter was used to accurately measure the daily oil production of each block. In order to achieve this goal, the staff of the oil collection point are required to enter the valve pool for the reverse flow operation, and the tank can be metered, and up to ten times a day, regardless of day or night, this work is greatly increased. The work intensity of the post employees also has a large potential safety hazard.
Second, the problem is that the valve pool of the oil collection point is about 2 meters deep, about 3 meters long and wide. There are six process pipelines in the pool, including two oil collection pipelines and four heat supply pipelines. The employees can pass the vertical ladder on the wall. After entering the pool, employees frequently enter the pool and have the following security risks.
1. There is a risk of slipping; the valve pool is about 2 meters deep. There is only one vertically installed ladder in the pool. When the ladder is up and down, the foot is easy to slip. There is a great risk, especially when it rains, it is snowy, and it increases the danger. coefficient.
2, there is a risk of suffocation; long-term valve pool is easy to gather harmful gases such as oil and gas, carbon dioxide, etc., employees are operating in the valve pool, there is a risk of hypoxia and suffocation.
3. There is a risk of tripping; there are six process pipelines in the valve pool, two of which are the outlet pipelines of the two tanks and four of the heat-conducting pipelines. When the process is reversed, it is necessary to cross the pipeline to reach the operating point, and there is a risk of tripping by the pipeline.
4. There is danger of falling: there is an iron cover at the entrance of the valve pool. Because the employees need to enter the valve pool frequently, the iron cover is often open, which has the danger of people falling into the valve pool.
3. Set the goal to prevent the occurrence of safety accidents caused by the above safety hazards, reduce the labor intensity of employees, and ensure the safety of employees, and initially propose two solutions.
1. The relevant department of the higher level proposes the transformation proposal. It is recommended that the ordinary valve in the valve pool be replaced with an electric control valve that can realize automatic control. The control of the target valve switch in the valve pool can be realized in the duty room.
2. Develop the remote switch of the valve by itself, and transfer the switching process in the valve pool to the scene for operation, so as to avoid the occurrence of safety accidents caused by the above safety hazards.
After comparing the two schemes, the first scheme has good effect, but the investment is large, the construction is difficult, the construction period will be longer, but the effect is good, and automatic control can be realized. The second scheme is compared with the first scheme. The effect of the scheme is poor, but the investment is saved, the construction is difficult, and the effect is not much different. The same can be achieved to eliminate the safety hazard, so the second scheme is decided.
Fourth, the problem to be solved The development of the valve remote switch, in the design needs to solve the following problems.
1. How to fix the target valve in the valve pool and facilitate the switching of the target valve in the valve pool.
2. How to fix the operating valve switch on the ground on the cement cover above the valve basin, and make it fixed firmly and durable.
3. How to realize the flexible operation between the ground operated valve switch and the cement cover support to ensure the feasibility of realizing the valve remote switch.
4. How to solve the problem that the rotation between the ground operated valve switch and the target valve in the underground valve pool is inflexible due to the deviation of the installation position.
V. Solution For the above problems, find the best solution one by one, and ensure that the developed valve remote transmission switch device is flexible and easy to use. The following are item-by-item solutions.
1. For how to fix the target valve in the valve pool and ensure its convenient switch, we have developed a special chuck for the valve handwheel. By means of the upper and lower chucks, the valve handwheel is clamped in the middle and made in the card slot. Firmly fixed, the upper and lower chucks are fixed together with the hand wheel by screws to ensure that the hand wheel can rotate together with the chuck; then, a 300 mm long Φ48×4 welded pipe is welded on the upper chuck as a short circuit. The purpose is to ensure that the screw of the target valve can flex and retract when the valve in the valve is opened and closed.
2. For the problem of how to fix the valve switch on the ground to the cement cover above the valve pool, we have specially developed the grounding base of the linkage device. The main body is a Φ48×4 welded pipe at the upper end and middle of the welded pipe. One DN40 flange is welded at the lower end, two screw holes and one base mounting hole are opened on the cement cover, the ground base of the linkage device is seated on the cement cover, and a flange is installed at the lower end of the cement cover. The grounding base flange of the moving device and the flange under the cement cover are fastened by bolts, so that the grounding base of the linkage device is firmly fixed on the cement cover.
3. For how to realize the flexible operation between the ground operated valve switch and the cement cover support to ensure the feasibility of the valve remote switch, we use bearings in the design to solve this problem, specifically the bearing housing and The grounding base of the linkage is bolted together, the bearing is installed in the bearing housing, and then the screw of the ground operating valve is firmly fixed in the middle of the bearing to make it rotate freely. 4. In order to solve the problem of inflexibility caused by the deviation of the installation position between the ground operated valve switch and the target valve in the underground valve pool, we adopted the working principle of the universal joint (cross shaft) to solve the problem. The above question. Specifically, when designing the position of the pin hole at the upper and lower ends of the intermediate connecting rod, the cross layout is adopted to form a cross shaft effect, and the target valve in the ground operating valve and the underground valve pool is ensured even if there is a deviation of the mounting position. It can still reliably transmit power.
Sixth, the design plan After careful investigation and analysis, and through careful study, finally designed the assembly diagram of the valve remote transmission switch, the valve remote transmission switch is composed of three parts: the ground part, the connecting part and the underground part.
Seven, the structure and use of each part:
1. Ground part: It consists of the base of the linkage, the bearing seat, the bearing, the screw rod and the hand wheel. The utility model is to firmly fix the ground operating valve on the cement cover on the valve pool, so that the hand wheel and the screw rod drive the connecting rod and the target valve in the valve pool to rotate together.
2. Connecting part: It consists of a connecting rod and a connecting rod. Its function is to transmit the rotating torque, and use its cross pin design to eliminate the jamming phenomenon caused by the deviation of the installation position and transmit the power effectively and reliably.
3. Underground part: It consists of the upper seat of the chuck and the lower seat of the chuck. Its function is to catch the target valve hand wheel in the valve pool, to ensure that it rotates freely, and to ensure that the target valve screw switch is freely stretched and unaffected.
Eight, the working principle of the remote switch:
The working principle of the valve remote switch is to rotate the valve hand wheel on the ground to drive the connecting rod and the target valve hand wheel in the valve pool to rotate together, so as to realize the purpose of switching the target valve in the valve pool by controlling the ground operation valve. .
Nine, application effect evaluation and summary:
Two sets of valve remote switch are made, which are installed on the cement cover of the valve block of the oil collection point. It is used for the operation of the process of switching the oil tank. After the use of the staff of the post, the remote switch prevents the employee from entering the valve pool. The various security risks brought about by the process also reduce the labor intensity of employees to some extent. The operation of the switch on the ground is the same as the effect of opening and closing the valve in the valve pool. The operation of the hand wheel does not have any jamming, indicating that the development of the remote switch is successful.
Ten, advantages and disadvantages:
Advantages of the valve remote switch:
1. The installation of the remote switch facilitates the operation of the employees and eliminates safety hazards.
2, the structure is simple, easy to repair.
3. Less investment and good application effect.
Disadvantages of the valve remote switch:
1. Since the remote switch is installed outdoors, the operation of the staff is susceptible to the weather, especially in snowy and rainy days, which is not convenient for employees to operate.
2. Compared with electric control valves, automatic control cannot be realized.
[Keywords] sub-tank metering, remote control.
CLC number: TP872 Document code: A Article ID: 1009-914X(2018)37-0365-01
I. Overview The oil collection point of a joint station of a certain oil production plant was built in 1987. It was upgraded and rebuilt in 2009, mainly responsible for the single well drawing oil in the western block of the plant, pulling the well to pull oil and landing the oil. Recycling work, and transported to the gathering and transportation processing system through the external pump. After the refueling point is rebuilt, there are two oil collection tanks, one sewage treatment recovery tank, four sewage oil recovery pumps, and the daily oil collection process is single well. After the oil pulled back by the tanker is weighed by the ground scale, the oil in the tanker is discharged into the oil collection tank, and the water discharge analyzer is installed at the discharge port, and the oil is discharged from the beginning to the end of the oil discharge. The water content analysis measures the average water content of each tanker. After the empty tanker is weighed by the scale, the total liquid volume is calculated. The total liquid volume and the average water content of each tanker are used to calculate the oil quantity per tank. The crude oil in the tank is sent to the collecting and dewatering system in the station through the oil collecting pump at the oil collecting point for dehydration treatment, and a mass flow meter is installed at the outlet of the oil pump to the dewatering system in the station for measuring the oil collecting point and the external dewatering system. The amount of oil. In the actual production operation, the human-induced interference factor of the water-containing analyzer is large, and the error of the water-containing analysis probe itself of the oil-receiving tank mouth leads to the calculation of the calculated oil-receiving amount and the mass flow meter measurement by the water-containing analyzer. There is a certain difference in the amount of oil. In 2014, as the community blocks were gradually developed and put into production, the higher authorities requested to clarify the oil production per block. For this purpose, the oil collection point was required to carry out the oil transfer, and the mass flow meter was used to accurately measure the daily oil production of each block. In order to achieve this goal, the staff of the oil collection point are required to enter the valve pool for the reverse flow operation, and the tank can be metered, and up to ten times a day, regardless of day or night, this work is greatly increased. The work intensity of the post employees also has a large potential safety hazard.
Second, the problem is that the valve pool of the oil collection point is about 2 meters deep, about 3 meters long and wide. There are six process pipelines in the pool, including two oil collection pipelines and four heat supply pipelines. The employees can pass the vertical ladder on the wall. After entering the pool, employees frequently enter the pool and have the following security risks.
1. There is a risk of slipping; the valve pool is about 2 meters deep. There is only one vertically installed ladder in the pool. When the ladder is up and down, the foot is easy to slip. There is a great risk, especially when it rains, it is snowy, and it increases the danger. coefficient.
2, there is a risk of suffocation; long-term valve pool is easy to gather harmful gases such as oil and gas, carbon dioxide, etc., employees are operating in the valve pool, there is a risk of hypoxia and suffocation.
3. There is a risk of tripping; there are six process pipelines in the valve pool, two of which are the outlet pipelines of the two tanks and four of the heat-conducting pipelines. When the process is reversed, it is necessary to cross the pipeline to reach the operating point, and there is a risk of tripping by the pipeline.
4. There is danger of falling: there is an iron cover at the entrance of the valve pool. Because the employees need to enter the valve pool frequently, the iron cover is often open, which has the danger of people falling into the valve pool.
3. Set the goal to prevent the occurrence of safety accidents caused by the above safety hazards, reduce the labor intensity of employees, and ensure the safety of employees, and initially propose two solutions.
1. The relevant department of the higher level proposes the transformation proposal. It is recommended that the ordinary valve in the valve pool be replaced with an electric control valve that can realize automatic control. The control of the target valve switch in the valve pool can be realized in the duty room.
2. Develop the remote switch of the valve by itself, and transfer the switching process in the valve pool to the scene for operation, so as to avoid the occurrence of safety accidents caused by the above safety hazards.
After comparing the two schemes, the first scheme has good effect, but the investment is large, the construction is difficult, the construction period will be longer, but the effect is good, and automatic control can be realized. The second scheme is compared with the first scheme. The effect of the scheme is poor, but the investment is saved, the construction is difficult, and the effect is not much different. The same can be achieved to eliminate the safety hazard, so the second scheme is decided.
Fourth, the problem to be solved The development of the valve remote switch, in the design needs to solve the following problems.
1. How to fix the target valve in the valve pool and facilitate the switching of the target valve in the valve pool.
2. How to fix the operating valve switch on the ground on the cement cover above the valve basin, and make it fixed firmly and durable.
3. How to realize the flexible operation between the ground operated valve switch and the cement cover support to ensure the feasibility of realizing the valve remote switch.
4. How to solve the problem that the rotation between the ground operated valve switch and the target valve in the underground valve pool is inflexible due to the deviation of the installation position.
V. Solution For the above problems, find the best solution one by one, and ensure that the developed valve remote transmission switch device is flexible and easy to use. The following are item-by-item solutions.
1. For how to fix the target valve in the valve pool and ensure its convenient switch, we have developed a special chuck for the valve handwheel. By means of the upper and lower chucks, the valve handwheel is clamped in the middle and made in the card slot. Firmly fixed, the upper and lower chucks are fixed together with the hand wheel by screws to ensure that the hand wheel can rotate together with the chuck; then, a 300 mm long Φ48×4 welded pipe is welded on the upper chuck as a short circuit. The purpose is to ensure that the screw of the target valve can flex and retract when the valve in the valve is opened and closed.
2. For the problem of how to fix the valve switch on the ground to the cement cover above the valve pool, we have specially developed the grounding base of the linkage device. The main body is a Φ48×4 welded pipe at the upper end and middle of the welded pipe. One DN40 flange is welded at the lower end, two screw holes and one base mounting hole are opened on the cement cover, the ground base of the linkage device is seated on the cement cover, and a flange is installed at the lower end of the cement cover. The grounding base flange of the moving device and the flange under the cement cover are fastened by bolts, so that the grounding base of the linkage device is firmly fixed on the cement cover.
3. For how to realize the flexible operation between the ground operated valve switch and the cement cover support to ensure the feasibility of the valve remote switch, we use bearings in the design to solve this problem, specifically the bearing housing and The grounding base of the linkage is bolted together, the bearing is installed in the bearing housing, and then the screw of the ground operating valve is firmly fixed in the middle of the bearing to make it rotate freely. 4. In order to solve the problem of inflexibility caused by the deviation of the installation position between the ground operated valve switch and the target valve in the underground valve pool, we adopted the working principle of the universal joint (cross shaft) to solve the problem. The above question. Specifically, when designing the position of the pin hole at the upper and lower ends of the intermediate connecting rod, the cross layout is adopted to form a cross shaft effect, and the target valve in the ground operating valve and the underground valve pool is ensured even if there is a deviation of the mounting position. It can still reliably transmit power.
Sixth, the design plan After careful investigation and analysis, and through careful study, finally designed the assembly diagram of the valve remote transmission switch, the valve remote transmission switch is composed of three parts: the ground part, the connecting part and the underground part.
Seven, the structure and use of each part:
1. Ground part: It consists of the base of the linkage, the bearing seat, the bearing, the screw rod and the hand wheel. The utility model is to firmly fix the ground operating valve on the cement cover on the valve pool, so that the hand wheel and the screw rod drive the connecting rod and the target valve in the valve pool to rotate together.
2. Connecting part: It consists of a connecting rod and a connecting rod. Its function is to transmit the rotating torque, and use its cross pin design to eliminate the jamming phenomenon caused by the deviation of the installation position and transmit the power effectively and reliably.
3. Underground part: It consists of the upper seat of the chuck and the lower seat of the chuck. Its function is to catch the target valve hand wheel in the valve pool, to ensure that it rotates freely, and to ensure that the target valve screw switch is freely stretched and unaffected.
Eight, the working principle of the remote switch:
The working principle of the valve remote switch is to rotate the valve hand wheel on the ground to drive the connecting rod and the target valve hand wheel in the valve pool to rotate together, so as to realize the purpose of switching the target valve in the valve pool by controlling the ground operation valve. .
Nine, application effect evaluation and summary:
Two sets of valve remote switch are made, which are installed on the cement cover of the valve block of the oil collection point. It is used for the operation of the process of switching the oil tank. After the use of the staff of the post, the remote switch prevents the employee from entering the valve pool. The various security risks brought about by the process also reduce the labor intensity of employees to some extent. The operation of the switch on the ground is the same as the effect of opening and closing the valve in the valve pool. The operation of the hand wheel does not have any jamming, indicating that the development of the remote switch is successful.
Ten, advantages and disadvantages:
Advantages of the valve remote switch:
1. The installation of the remote switch facilitates the operation of the employees and eliminates safety hazards.
2, the structure is simple, easy to repair.
3. Less investment and good application effect.
Disadvantages of the valve remote switch:
1. Since the remote switch is installed outdoors, the operation of the staff is susceptible to the weather, especially in snowy and rainy days, which is not convenient for employees to operate.
2. Compared with electric control valves, automatic control cannot be realized.
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