Reformed heat tracing production device utilizing old heat

Abstract

The utility model discloses an old-utilization transformation type heat tracing production device which comprises a separator, an oil outlet pipe, a liquid inlet pipe and a water outlet pipe are arranged on the upper portion, the middle portion and the lower portion of the side wall of the separator respectively, a gas outlet pipe is arranged at the top of the separator, the oil outlet pipe is connected with an oil main line, and the water outlet pipe is connected with a watering main line. The liquid inlet pipe is connected with a single well return station pipeline; free conversion between in-station production and separation in the three-phase separator 1 is achieved through the ground process switching manifold, crude oil is input into the three-phase separator 1 through a pipeline, oil with small density flows out from the upper portion through settling separation, water with large density flows out from the bottom, pressurization is conducted through the ground lifting pump, and the crude oil flows out from the lower portion of the three-phase separator 1. The device acts on a ground heat tracing system to realize oil well ground heat tracing production.

Description

Technical Field

[0001] The utility model relates to the field of water mixing and transportation in oil and gas fields, in particular to a reusing and reforming type heat tracing production device. Background Art

[0002] The crude oil produced by most oil fields of PetroChina is mainly paraffin-based. When the crude oil contains a high wax content. The physical properties of the oil show the characteristics of "three highs", namely high freezing point, high viscosity and high wax content. For this part of crude oil, the water content is low in the early stage of development, and the ground engineering adopts the method of heating and gathering to ensure that the crude oil system is above the freezing point; as the oil field enters the late stage of development, the oil well production enters a high water content period. With the rapid increase of liquid production and water content, the amount of associated gas generally decreases significantly. In this case, if the oil gathering system continues to use the heating oil gathering method, the energy consumption of the ground system will increase significantly. According to statistics, the energy consumption of the oil gathering system accounts for more than 40% of the total energy consumption of the ground engineering. At present, the commonly used ground heating system is that the joint station heats the separated water through the heating furnace, and then transports it to a single well through the pipeline network. However, there is a high heat energy loss in the long-distance transportation of large-area pipelines, resulting in a waste of resources, and the cost of pipeline corrosion and perforation treatment is increasing year by year. Another method is the wellhead electric heating and heating production, which consumes a lot of electricity, wastes a lot of resources and is expensive.

[0003] In addition, Chinese patent CN106131979A discloses an electric heating production process system, in which one end of the first electric heating valve is connected to the electric heating melting mixed reaction equipment, the other end of the first electric heating valve is connected to the electric heating tee through the electric heating filter, the electric heating soft connection, the electric heating pump and the first electric heating pipeline in sequence, and the third end of the electric heating tee is connected to the electric heating mixed reaction storage equipment through the second electric heating pipeline, the first electric heating elbow, the third electric heating pipeline, the second electric heating valve and the second electric heating elbow in sequence.

[0004] The existing technology is to produce long-distance heating for pipelines, which has high electric heating costs, waste of resources, and instability in the electrical equipment system, posing a safety hazard of fire, which is not conducive to the green and sustainable development of old oil fields. Utility Model Content

[0005] The purpose of the utility model is to provide a re-use and transformation type heat tracing production device, aiming to improve the problem of high heat energy loss and increasing cost of pipeline corrosion and perforation treatment in long-distance transportation over a large area of ​​pipeline network, which causes some oil wells to block pipelines due to water incorporation, affecting normal production.

[0006] The utility model is implemented as follows: a re-use and transformation type heat tracing production device comprises a separator, an oil outlet pipe, a liquid inlet pipe and a water outlet pipe are respectively arranged at the upper, middle and lower parts of the side wall of the separator, and a gas outlet pipe is arranged at the top of the separator, the oil outlet pipe is connected to the oil trunk line, the water outlet pipe is connected to the water blending trunk line, and the liquid inlet pipe is connected to the single well return station pipeline.

[0007] Preferably, a gate valve group is provided on the single well return pipeline, and pumps are provided on both the oil outlet pipe and the water outlet pipe.

[0008] Preferably, the water outlet pipe is also provided with a filter, and the gas outlet pipe is provided with a pressure valve.

[0009] Preferably, the lower end of the separator is configured as a frustum shell structure, and a sewage pipe is provided at a low position, and a sealing plate is adjustably provided on the sewage pipe.

[0010] Preferably, a perforation is provided on the side wall of the sewage pipe, and an arc-shaped groove is provided on the inner side surface, the arc-shaped groove is communicated with the perforation, the sealing plate passes through the perforation, and the end portion can be inserted into the arc-shaped groove.

[0011] Preferably, a floating mechanism is provided in the separator, the floating mechanism comprising a transverse plate, a hose and a floating ball, one end of the hose is connected to the transverse plate, and the other end is connected to the oil outlet pipe, and two floating balls are provided and are respectively arranged under the transverse plate.

[0012] Preferably, both ends of the transverse plate are provided with a slot, the side walls of the slot are inlaid with balls, and the side walls of the separator are provided with a column, the column passes through the slot, and the ball contacts the column.

[0013] Preferably, a heat preservation mechanism is also provided in the separator, the heat preservation mechanism includes a heater and two support plates, the support plates are provided with mounting grooves, an extrusion plate is detachably provided at the mounting grooves, and the heater is provided through the contact position of the extrusion plate and the support plate.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The self-produced liquid of the oil well can be freely switched between production in the station and separation in the three-phase separator through the surface process switching manifold. The crude oil is input into the separator through the single well return station pipeline. After sedimentation separation, the oil with low density flows out from the upper side, and the water with high density flows out from the lower end. It is pressurized by the pump and used in the ground heating system to realize the ground heating production of the oil well. On the one hand, it realizes the purpose of water mixing and pressure control in oil well production, and reduces the cost of pipeline corrosion and perforation treatment. On the other hand, it reduces the high heat energy loss in long-distance transportation of large-area pipelines, effectively reducing the development cost.

[0016] 2. The setting of the floating mechanism can make the end of the hose higher than the water level under the action of buoyancy, so as to pump the crude oil under the action of the pump, while avoiding the influence of the liquid level change on the output of crude oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of a plane of an embodiment of the utility model;

[0018] Figure 2 This utility model Figure 1 A schematic diagram of the structure of the separator plane;

[0019] Figure 3 This utility model Figure 1 Schematic diagram of the structure of the middle liquid inlet pipe and the single well return pipeline plane;

[0020] Figure 4 This utility model Figure 1 A schematic diagram of the three-dimensional structure of the separator;

[0021] Figure 5 This utility model Figure 4 A schematic diagram of the three-dimensional structure of the bottom of the separator;

[0022] Figure 6 This utility model Figure 4 A three-dimensional structural diagram of the middle heat preservation mechanism;

[0023] Figure 7 This utility model Figure 4 Schematic diagram of the three-dimensional structure of the floating mechanism.

[0024] In the figure: 1. separator; 11. drain pipe; 111. perforation; 112. adjusting screw; 12. liquid inlet pipe; 13. water outlet pipe; 14. oil outlet pipe; 15. pump; 16. gas outlet pipe; 17. pressure valve; 18. sealing plate; 2. oil trunk line; 3. water blending trunk line; 4. single well return station pipeline; 5. insulation mechanism; 51. heater; 52. support plate; 53. mounting groove; 54. extrusion plate; 6. floating mechanism; 61. cross plate; 62. floating ball; 63. slot. DETAILED DESCRIPTION

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] The following is a further description with reference to the accompanying drawings and specific embodiments:

[0027] Example 1

[0028] like Figure 1 , Figure 2 , Figure 3As shown, a re-use and transformation type heat tracing production device includes a separator 1, a crude oil inlet hole, a crude oil outlet and a water outlet are arranged at appropriate positions of the separator 1, and a liquid inlet pipe 12 is arranged at the crude oil inlet hole, an oil outlet pipe 14 is arranged at the crude oil outlet, and a water outlet pipe 13 is arranged at the water outlet, and the oil outlet pipe 14, the liquid inlet pipe 12 and the water outlet pipe 13 are distributed at different positions of the upper, middle and lower sides of the side wall of the separator 1. It also includes a single well return station pipeline 4. On the basis of the original pipeline entering the station, a set of valve groups with gates is added. The switching method is to close the single well liquid gate in the station and open the gate of the newly built valve group to allow the liquid to enter the single well return station pipeline 4. The single well return station pipeline 4 is connected to the liquid inlet pipe 12. Therefore, the crude oil output from the oil well directly enters the separator 1. According to the oil-water density characteristics, the low-density crude oil floats on the water with a higher density, and the crude oil passes through the crude oil outlet and enters the oil outlet pipe 14, and finally merges into the oil trunk line 2 to realize the collection of crude oil. At the same time, water passes through the water outlet and enters the water outlet pipe 13 and merges into the water main line 3 for discharge. In order to discharge the gas in the separator 1 in time, a gas outlet pipe 16 is arranged on the top of the separator 1 to provide a channel for gas discharge, and a pressure valve 17 is arranged on the gas outlet pipe 16.

[0029] When using this device for production, the specific operating steps are as follows:

[0030] Step 1: Liquid from a single well passes through Figure 3 The gate of the middle single well is switched and merged into the single well return station pipeline 4.

[0031] Step 2: The single well return pipeline 4 passes through the liquid inlet pipe 12 and the gate and enters Figure 2 of separator 1.

[0032] Step 3: The mixed oil-water liquid is separated by the separator 1 , and the mixed water flows out from the water outlet pipe 13 .

[0033] Step 4: The separated water is pressurized by the pump 15 and flows into the water mixing main line 3.

[0034] Step 5: The water injection trunk line 3 passes through the branch water injection gate to inject water and heat the single well for production.

[0035] Step six: Then, through the single well return station pipeline 4, a closed loop of the ground heating production system is formed.

[0036] Through this technical transformation, the self-produced fluid of the oil well was separated, and the framework of the ground heating system was completed through the ground manifold and the booster system, saving the cost of water mixing and heating and the cost of pipeline perforation treatment. The self-produced fluid of the oil well is freely switched between entering the station production and entering the three-phase separator 1 through the ground process switching manifold. The crude oil is input into the three-phase separator 1 through the pipeline. After sedimentation separation, the oil with low density flows out from the top, and the water with high density flows out from the bottom. It is pressurized by the ground lifting pump and used for the ground heating system to realize the ground heating production of the oil well. On the one hand, the purpose of water mixing and pressure control in oil well production is achieved, and the cost of pipeline corrosion perforation treatment is reduced; on the other hand, the high heat energy loss caused by long-distance transportation of large-area pipelines is reduced, which effectively reduces the development cost.

[0037] like Figure 1 , Figure 2 As shown, a pump 15 is provided on the oil outlet pipe 14 and the water outlet pipe 13, which is convenient for increasing the pressure inside the pipeline to realize the transportation of liquid. A filter is also provided on the water outlet pipe 13 to remove impurities in the water.

[0038] In order to avoid low pressure in the single well return station pipeline 4, a safety remote pressure gauge is installed on the single well return station pipeline 4, and a low pressure alarm is set to avoid irreversible damage caused by idling of the pump 15 due to the failure of individual oil wells to produce liquid.

[0039] like Figure 4 , Figure 5 As shown, in order to facilitate the discharge of dirt in the separator 1, the lower end of the separator 1 is set to a frustum shell structure, and a sewage pipe 11 is set at a low position. A perforation 111 is set on the side wall of the sewage pipe 11, and an arc groove is set on the inner side. The arc groove is connected to the perforation 111. An adjusting screw 112 is also set on the sewage pipe 11. A sealing plate 18 is set on the sewage pipe 11. The sealing plate 18 passes through the perforation 111, and the end can be inserted into the arc groove. At the same time, the sealing plate 18 is threaded through the adjusting screw 112. When it is necessary to clean the separator 1, the staff can rotate the adjusting screw 112 to control the movement of the sealing plate 18 to make the sewage pipe 11 unobstructed, and the dirt can be discharged through the sewage pipe 11. After cleaning, the adjusting screw 112 is rotated in the opposite direction to force the sealing plate 18 to reset and block the sewage pipe 11, which facilitates the operation of the separator 1.

[0040] like Figure 4 , Figure 7As shown, in order to effectively remove the crude oil in the separator 1, a floating mechanism 6 is provided in the separator 1. The floating mechanism 6 includes a horizontal plate 61, a hose and a floating ball 62. One end of the hose is connected to the horizontal plate 61, and the other end is connected to the oil outlet pipe 14. Two floating balls 62 are provided, and are respectively arranged under the horizontal plate 61, and both floating balls 62 can be inflated and deflated. By placing the floating ball 62 in the water, the device is forced to float under the action of buoyancy, so that the end of the hose is higher than the water surface, so that the crude oil can be pumped under the action of the pump 15, and the output of the crude oil can be prevented from being affected by the change of the liquid surface. The floating ball 62 is set to be inflatable and deflated, so that when assembling the device or repairing the device, it is convenient for the staff to adjust the position of the hose relative to the water surface according to the needs, providing support for the crude oil transportation.

[0041] like Figure 4 , Figure 7 As shown, in order to make the mechanism stable and able to rise and fall with the change of liquid level, both ends of the horizontal plate 61 are provided with a slot 63, the side wall of the slot 63 is inlaid with a ball, and a clamping column is provided on the side wall of the separator 1, the clamping column penetrates the slot 63, and the ball contacts the clamping column. With the cooperation of the clamping column and the slot 63, the horizontal plate 61 is stably and movably arranged in the separator 1, and the rolling of the ball reduces the resistance of the horizontal plate 61 to the movement of the clamping column.

[0042] Example 2

[0043] like Figure 1 , Figure 2 , Figure 3 As shown, a re-use and transformation type heat tracing production device includes a separator 1, a crude oil inlet hole, a crude oil outlet and a water outlet are arranged at appropriate positions of the separator 1, and a liquid inlet pipe 12 is arranged at the crude oil inlet hole, an oil outlet pipe 14 is arranged at the crude oil outlet, and a water outlet pipe 13 is arranged at the water outlet, and the oil outlet pipe 14, the liquid inlet pipe 12 and the water outlet pipe 13 are distributed at different positions of the upper, middle and lower sides of the side wall of the separator 1. It also includes a single well return station pipeline 4. On the basis of the original pipeline entering the station, a set of valve groups with gates is added. The switching method is to close the single well liquid gate in the station and open the gate of the newly built valve group to allow the liquid to enter the single well return station pipeline 4. The single well return station pipeline 4 is connected to the liquid inlet pipe 12. Therefore, the crude oil output from the oil well directly enters the separator 1. According to the oil-water density characteristics, the low-density crude oil floats on the water with a higher density, and the crude oil passes through the crude oil outlet and enters the oil outlet pipe 14, and finally merges into the oil trunk line 2 to realize the collection of crude oil. At the same time, water passes through the water outlet and enters the water outlet pipe 13 and merges into the water main line 3 for discharge. In order to discharge the gas in the separator 1 in time, a gas outlet pipe 16 is arranged on the top of the separator 1 to provide a channel for gas discharge, and a pressure valve 17 is arranged on the gas outlet pipe 16.

[0044] When using this device for production, the specific operating steps are as follows:

[0045] Step 1: Liquid from a single well passes through Figure 3 The gate of the middle single well is switched and merged into the single well return station pipeline 4.

[0046] Step 2: The single well return pipeline 4 passes through the liquid inlet pipe 12 and the gate and enters Figure 2 of separator 1.

[0047] Step 3: The mixed oil-water liquid is separated by the separator 1 , and the mixed water flows out from the water outlet pipe 13 .

[0048] Step 4: The separated water is pressurized by the pump 15 and flows into the water mixing main line 3.

[0049] Step 5: The water injection trunk line 3 passes through the branch water injection gate to inject water and heat the single well for production.

[0050] Step six: Then, through the single well return station pipeline 4, a closed loop of the ground heating production system is formed.

[0051] Through this technical transformation, the self-produced fluid of the oil well was separated, and the framework of the ground heating system was completed through the ground manifold and the booster system, saving the cost of water mixing and heating and the cost of pipeline perforation treatment. The self-produced fluid of the oil well is freely switched between entering the station production and entering the three-phase separator 1 through the ground process switching manifold. The crude oil is input into the three-phase separator 1 through the pipeline. After sedimentation separation, the oil with low density flows out from the top, and the water with high density flows out from the bottom. It is pressurized by the ground lifting pump and used for the ground heating system to realize the ground heating production of the oil well. On the one hand, the purpose of water mixing and pressure control in oil well production is achieved, and the cost of pipeline corrosion perforation treatment is reduced; on the other hand, the high heat energy loss caused by long-distance transportation of large-area pipelines is reduced, which effectively reduces the development cost.

[0052] like Figure 1 , Figure 2 As shown, a pump 15 is provided on the oil outlet pipe 14 and the water outlet pipe 13, which is convenient for increasing the pressure inside the pipeline to realize the transportation of liquid. A filter is also provided on the water outlet pipe 13 to remove impurities in the water.

[0053] In order to avoid low pressure in the single well return station pipeline 4, a safety remote pressure gauge is installed on the single well return station pipeline 4, and a low pressure alarm is set to avoid irreversible damage caused by idling of the pump 15 due to the failure of individual oil wells to produce liquid.

[0054] like Figure 4 , Figure 5As shown, in order to facilitate the discharge of dirt in the separator 1, the lower end of the separator 1 is set to a frustum shell structure, and a sewage pipe 11 is set at a low position. A perforation 111 is set on the side wall of the sewage pipe 11, and an arc groove is set on the inner side. The arc groove is connected to the perforation 111. An adjusting screw 112 is also set on the sewage pipe 11. A sealing plate 18 is set on the sewage pipe 11. The sealing plate 18 passes through the perforation 111, and the end can be inserted into the arc groove. At the same time, the sealing plate 18 is threaded through the adjusting screw 112. When it is necessary to clean the separator 1, the staff can rotate the adjusting screw 112 to control the movement of the sealing plate 18 to make the sewage pipe 11 unobstructed, and the dirt can be discharged through the sewage pipe 11. After cleaning, the adjusting screw 112 is rotated in the opposite direction to force the sealing plate 18 to reset and block the sewage pipe 11, which facilitates the operation of the separator 1.

[0055] like Figure 4 , Figure 7 As shown, in order to effectively remove the crude oil in the separator 1, a floating mechanism 6 is provided in the separator 1. The floating mechanism 6 includes a horizontal plate 61, a hose and a floating ball 62. One end of the hose is connected to the horizontal plate 61, and the other end is connected to the oil outlet pipe 14. Two floating balls 62 are provided, and are respectively arranged under the horizontal plate 61, and both floating balls 62 can be inflated and deflated. By placing the floating ball 62 in the water, the device is forced to float under the action of buoyancy, so that the end of the hose is higher than the water surface, so that the crude oil can be pumped under the action of the pump 15, and the output of the crude oil can be prevented from being affected by the change of the liquid surface. The floating ball 62 is set to be inflatable and deflated, so that when assembling the device or repairing the device, it is convenient for the staff to adjust the position of the hose relative to the water surface according to the needs, providing support for the crude oil transportation.

[0056] like Figure 4 , Figure 7 As shown, in order to make the mechanism stable and able to rise and fall with the change of liquid level, both ends of the horizontal plate 61 are provided with a slot 63, the side wall of the slot 63 is inlaid with a ball, and a clamping column is provided on the side wall of the separator 1, the clamping column penetrates the slot 63, and the ball contacts the clamping column. With the cooperation of the clamping column and the slot 63, the horizontal plate 61 is stably and movably arranged in the separator 1, and the rolling of the ball reduces the resistance of the horizontal plate 61 to the movement of the clamping column.

[0057] like Figure 1 , Figure 6 As shown, a heat preservation mechanism 5 is also provided in the separator 1, and the heat preservation mechanism 5 includes a heater 51 and two support plates 52. The support plates 52 are provided with mounting grooves 53, and a pressing plate 54 is detachably provided at the mounting grooves 53. The heater 51 is provided through the contact position between the pressing plate 54 and the support plate 52. The heater 51 can be provided as an electric heating wire or as a pipe storing circulating hot water, so as to provide support for the heat preservation of crude oil.

[0058] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be modified and varied in various ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A re-use and reconstruction type heat tracing production device, characterized in that: The invention comprises a separator (1), wherein an oil outlet pipe (14), a liquid inlet pipe (12) and a water outlet pipe (13) are respectively arranged at the top, middle and bottom of the side wall of the separator (1), and a gas outlet pipe (16) is arranged at the top of the separator (1), the oil outlet pipe (14) is connected to an oil trunk line (2), the water outlet pipe (13) is connected to a water blending trunk line (3), and the liquid inlet pipe (12) is connected to a single well return station pipeline (4).

2. A re-use and transformation type heat tracing production device according to claim 1, characterized in that: The single well return pipeline (4) is provided with a valve group with a gate, and the oil outlet pipe (14) and the water outlet pipe (13) are both provided with a pump (15).

3. A re-use and transformation type heat tracing production device according to claim 2, characterized in that: The water outlet pipe (13) is also provided with a filter, and the gas outlet pipe (16) is provided with a pressure valve (17).

4. The reusing and remodeling heat tracing production device according to claim 1 is characterized in that: The lower end of the separator (1) is arranged as a frustoconical shell structure, and a sewage discharge pipe (11) is arranged at a low position, and a sealing plate (18) is adjustably arranged on the sewage discharge pipe (11).

5. The reusing and remodeling heat tracing production device according to claim 4 is characterized in that: The side wall of the sewage discharge pipe (11) is provided with a through hole (111), and the inner side surface is provided with an arc groove, the arc groove is communicated with the through hole (111), and the sealing plate (18) is arranged to pass through the through hole (111), and the end portion can be inserted into the arc groove.

6. The reusing and remodeling heat tracing production device according to claim 1 is characterized in that: A floating mechanism (6) is arranged in the separator (1), and the floating mechanism (6) comprises a transverse plate (61), a hose and a floating ball (62). One end of the hose is connected to the transverse plate (61), and the other end is connected to the oil outlet pipe (14). Two floating balls (62) are arranged, and are respectively arranged at two ends below the transverse plate (61).

7. The reusing and remodeling heat tracing production device according to claim 6 is characterized in that: Both ends of the transverse plate (61) are provided with a clamping groove (63), the side wall of the clamping groove (63) is inlaid with a ball, and a clamping column is provided on the side wall of the separator (1), the clamping column passes through the clamping groove (63), and the ball contacts the clamping column.

8. The reusing and remodeling heat tracing production device according to claim 6 is characterized in that: A heat preservation mechanism (5) is also provided in the separator (1), the heat preservation mechanism (5) comprising a heater (51) and two support plates (52), the support plates (52) being provided with mounting grooves (53), a pressing plate (54) being detachably provided at the mounting grooves (53), and the heater (51) being provided at a contact position between the pressing plate (54) and the support plates (52).

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