CN217131532U - Oil field well site fluid temperature raising system - Google Patents

Abstract

The utility model discloses an oil field well site fluid temperature raising system, which comprises a gas heating furnace near an oil well, wherein the periphery and the upper part of a furnace hearth are water chambers in the furnace, and a coil pipe in the furnace is arranged in the water chamber in the furnace and is connected in series in a temperature raising pipeline of the oil well; a closed water replenishing tank is arranged above the furnace body, the bottom of the water replenishing tank is connected with the bottom of the water chamber in the furnace through a communicating pipe, and a water inlet is welded on the side wall of the top of the water chamber in the furnace; an open heat exchange water tank is arranged near the second oil well, and a coil is arranged in the open heat exchange water tank and is connected in series in a second oil well temperature raising pipeline; the bottom outlet of the open heat exchange water tank is connected with the water inlet of the water chamber in the furnace through a hot water circulating pump I and a heat preservation water inlet pipe, and the overflow port at the top of the water replenishing tank is connected with the top inlet of the open heat exchange water tank through a heat preservation water outlet pipe. The system can heat the produced liquid of all oil wells in a well site by using sleeve gas as an energy source, can avoid the use of power consumption equipment such as medium frequency and electric heating rods, reduces the exploitation cost and improves the production safety.

Description

Oil field well site fluid temperature raising system

Technical Field

The utility model relates to an oil field well site auxiliary assembly especially relates to an oil field well site fluid system of raising temperature, belongs to oil field well site firing equipment technical field.

Background

In the development and production of oil and gas fields, equipment such as skid-mounted gas heating furnaces, intermediate frequency heaters, electric heating rods and the like are required to be used for heating produced liquid (oil, gas and water) of an oil well, and smooth transmission of media such as crude oil and the like in pipelines is guaranteed. On one hand, after the oil layer is mined, the stratum can form a deficit and needs reinjection, and on the other hand, the country has the requirement of carbon neutralization, so that the carbon dioxide is injected into the stratum, the deficit of the stratum can be made up, and the purpose of carbon reduction can be realized. The temperature of the canned liquid carbon dioxide is very low, and the conveying pipeline also needs to be heated and accompanied with heat.

The skid-mounted heating furnace adopts oil well casing gas as fuel to heat a water chamber in the furnace, and is normal-pressure heating equipment which mainly comprises the following components in parts by weight: a water chamber in the furnace, a coil pipe in the furnace, a water replenishing tank, a burner and the like. Coil pipe submergence in stove in the stove hydroecium, after the heating furnace burning with the water heating of stove in the hydroecium to the uniform temperature, carry out indirect heating through the liquid of heat-conduction mode in giving the stove coil pipe, liquid outlet temperature in the coil pipe comes liquid measure and coil pipe quantity to decide by in the coil pipe.

The volume of the skid-mounted heating furnace is determined by the number of coil pipes in the furnace, and currently, 30KW, 50KW, 80KW and other types of heating furnaces are adopted in single-well production of oil and gas fields, so that the problem of temperature raising and pipeline conveying of part of oil well output liquid is solved under certain conditions. Skid-mounted gas fired furnaces, subject to safety regulations, are typically installed at a distance of 30 meters or more from the wellhead of the well.

The skid-mounted gas heating furnace is small in size and simple in structure, and can be used for directly utilizing casing gas produced by an oil well, so that the skid-mounted gas heating furnace is increasingly applied to development and production of oil and gas fields. At present, the number of skid-mounted gas heating furnaces used in an oil production plant reaches nearly 80, a large amount of electric energy is saved for oil field production, a small amount of casing gas produced in oil well production is fully utilized, and pollution caused by natural gas emission is reduced.

The skid-mounted gas heating furnace has the following problems in the actual use process: 1. a well site usually has several oil wells, and the distance between the adjacent oil wells is tens meters or more apart from the distance and varies, because the great reason of investment, a well site can only install a sled dress gas heating furnace usually, and sled dress gas heating furnace is close to a certain oil well usually, and well head far away from sled dress gas heating furnace still need use intermediate frequency heater and electric heating rod, and intermediate frequency heater and electric heating rod are pure resistance power consumption equipment, have solved oil well output liquid pipeline and have carried at certain within range. Wherein the intermediate frequency heater carries out whole-process heat tracing on the pipeline, and the highest temperature does not exceed 35 ℃; the electric heating rod is used for carrying out node temperature raising at the junction of oil well pipelines or the outlet of a single well pipeline, and is similar to the set point of a skid-mounted heating furnace. Even if the device is close to the wellhead of the skid-mounted gas heating furnace, the safety distance of more than 30 meters still exists, and heat tracing is needed. The carbon dioxide oil displacement technology in the carbon dioxide carbon emission reduction project is popularized in a plurality of blocks of oil fields in Jiangsu province, the daily power consumption reaches 1200kwh according to the carbon dioxide liquid carbon ground displacement of 30 tons/day, the power load is large, and the cost of electricity charge is high.

2. In order to ensure the safe production of well sites, the water phase system of the skid-mounted gas heating furnace only allows normal pressure operation, the furnace must be stopped when the temperature of a water chamber in the furnace reaches 85 ℃, and the furnace must be started when the temperature is lower than 80 ℃. And (3) counting the field use condition: the 30KW furnace burner runs for less than 8 hours all day with big fire, and the utilization rate is about 34 percent; the 50KW and 80KW burners run on big fire for less than 10 hours all day, and the utilization rate is about 42 percent; the partial oil well causes the partial furnace burner to operate for less than 6 hours all day due to the reduction of the liquid production amount and the like, and the utilization rate is about 25 percent. The utilization rate of the heating furnace is low, the recovery cost is relatively long, and the economic benefit is not high. The skid-mounted gas heating furnace that can use the sleeve pipe gas on the one hand utilizes rate not high, and on the other hand low liquid volume oil well is because can not obtain the companion's heat and raise the temperature to the distance between the heating furnace, and the oil well return pressure is high, need open intermediate frequency or electric heating rod, and the power consumption is big, leads to the exploitation cost height of oil well indirectly.

3. For the purpose of reducing investment and being convenient for install at oil field individual well or pipeline junction, the volume of sled dress heating furnace is all smaller, and the flourishing water volume in the sled dress heating furnace body is littleer, and wherein 80KW heating furnace water tank volume is only 470 kilograms, and 30KW heating furnace water tank volume is only 240 kilograms, leads to the thermal capacity undersize. Because the volume of the water tank of the heating furnace is small, the heat exchange area of the coil pipe in the furnace is small. Particularly, the heat exchange area of the coil pipe in the furnace of the 30KW furnace is only 1/3 of the 80KW furnace, the instantaneous liquid amount in the coil pipe in the furnace is higher than 30 tons/day (oil is discharged from oil well gaps), and the temperature raising effect of the discharged liquid of the furnace is poor, so that the oil well is high in return pressure.

4. The top of a furnace water chamber of the existing skid-mounted gas heating furnace has a section of gas phase space, when the water temperature of the furnace water chamber is higher than 76 ℃, the gasification is still easy to generate at the top of a furnace body water tank (the positions of a high water temperature sensor and a low water temperature sensor), a local high temperature alarm is formed, the furnace is shut down, and the furnace needs to be manually restarted after being cooled.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the problem that exists among the prior art, provide an oil field well site fluid system of raising the temperature, can utilize the sleeve pipe gas of companion to heat as the energy to the output liquid of all oil wells in well site, can stop the use of power consumptive equipment such as intermediate frequency, electric heating rod, reduce the exploitation cost, improve the security of production.

In order to solve the technical problem, the utility model discloses an oil field well site fluid temperature raising system, including the sled dress gas heating furnace that is located near a certain oil well, sled dress gas heating furnace includes the stove hydroecium that is located furnace periphery and top, built-in stove coil pipe in the stove hydroecium, the both ends of stove coil pipe in the stove are established ties in oil well one and are carried the temperature pipeline; a closed water replenishing tank is superposed above the furnace inner water chamber, the bottom of the water replenishing tank is connected with the side wall of the bottom of the furnace inner water chamber through a communicating pipe, the top wall of the water replenishing tank is connected with an overflow port of the water replenishing tank, and a water inlet of the furnace inner water chamber is welded on the side wall of the top of the furnace inner water chamber; an open heat exchange water tank is arranged near the oil well II adjacent to the oil well I, an open water tank coil is arranged in the open heat exchange water tank, and two ends of the open water tank coil are connected in series in a temperature raising pipeline of the oil well II; the bottom outlet of the open heat exchange water tank is connected with the inlet of a hot water circulating pump I, the outlet of the hot water circulating pump I is connected with the water inlet of the water chamber in the furnace through a heat preservation water inlet pipe, and the overflow port of the water replenishing tank is connected with the top inlet of the open heat exchange water tank through a heat preservation water outlet pipe.

As an improvement of the utility model, a first closed heat exchange water tank is arranged near a first oil well far away from the first oil well and adjacent to a second oil well, a first closed water tank coil is arranged in the first closed heat exchange water tank, and two ends of the first closed water tank coil are connected in series in a third temperature raising pipeline of the oil well; and the outlet at the bottom of the open heat exchange water tank is also connected with the inlet of a hot water circulating pump II, the outlet of the hot water circulating pump II is connected with the inlet at the bottom of the closed heat exchange water tank I through a heat-preservation water inlet pipe, and the outlet at the upper part of the closed heat exchange water tank I is connected with the upper water return port of the open heat exchange water tank through a heat-preservation water outlet pipe.

As a further improvement of the utility model, a second airtight heat exchange water tank is arranged near a fourth oil well which is far away from the second oil well and is adjacent to the third oil well, a second airtight water tank coil is arranged in the second airtight heat exchange water tank, and two ends of the second airtight water tank coil are connected in series in a fourth temperature raising pipeline of the oil well; the bottom outlet of the first closed heat exchange water tank is also connected with the inlet of a hot water circulating pump III, the outlet of the hot water circulating pump III is connected with the bottom inlet of the second closed heat exchange water tank through a heat-preservation water inlet pipe, and the upper outlet of the second closed heat exchange water tank is connected with the upper water return port of the first closed heat exchange water tank through a heat-preservation water outlet pipe; thus, heat is supplied to the oil well far away from the skid-mounted gas heating furnace step by step.

As a further improvement of the utility model, a first closed heat exchange water tank is arranged near a first oil well far away from the first oil well and adjacent to a second oil well, a first closed water tank coil is arranged in the first closed heat exchange water tank, and two ends of the first closed water tank coil are connected in series in a third temperature raising pipeline of the oil well; the bottom outlet of the open heat exchange water tank is also connected with the inlet of a hot water circulating pump II, the outlet of the hot water circulating pump II is connected with the bottom inlet of the closed heat exchange water tank I through a heat-preservation water inlet pipe, the upper outlet of the other side of the closed heat exchange water tank I is connected with the bottom inlet of the closed heat exchange water tank II through a heat-preservation water outlet pipe, a closed water tank coil II is arranged in the closed heat exchange water tank II, and two ends of the closed water tank coil II are connected in series in a temperature raising pipeline of the oil well IV; and an upper outlet on the other side of the closed heat exchange water tank II is connected with an upper water return port of the open heat exchange water tank through a first return pipeline.

As a further improvement of the utility model, the bottom outlet of the open heat exchange water tank is also connected with the inlet of a hot water circulating pump III, the outlet of the hot water circulating pump III is connected with the bottom inlet of a closed heat exchange water tank III through a heat preservation water inlet pipe, a closed water tank coil III is arranged in the closed heat exchange water tank III, and two ends of the closed water tank coil III are connected in series in a five-temperature raising pipeline of an oil well; and an upper outlet on the other side of the closed heat exchange water tank III is connected with an upper water return port of the open heat exchange water tank through a second return pipeline.

As a further improvement of the utility model, the collecting pipe at the lower end of the coil pipe in the furnace extends out from the lower end of the side wall of the water chamber in the furnace to form a coil pipe inlet in the furnace, and the collecting pipe at the upper end of the coil pipe in the furnace extends out from the upper end of the side wall of the water chamber in the furnace to form a coil pipe outlet in the furnace; the entry of each water tank coil pipe all is located the lower extreme, and the export of each water tank coil pipe all is located the upper end.

As a further improvement of the utility model, the top wall of the furnace chamber is connected with a plurality of smoke pipes extending upwards, the upper ends of the smoke pipes are respectively connected with an upper smoke chamber, the top center of the upper smoke chamber is connected with a main smoke exhaust pipe extending upwards, and the water replenishing tank surrounds the periphery of the main smoke exhaust pipe; the coil pipe in the furnace is positioned between the hearth and the upper smoke chamber and is coiled on the periphery of the smoke pipe bundle.

As a further improvement, the lower extreme of communicating pipe links to each other with the three-way middle part port of moisturizing, the three-way interior port of moisturizing with the bottom lateral wall of stove interior hydroecium links to each other, the three-way outer port of moisturizing passes through the moisturizing valve and links to each other with the moisturizing pipeline.

As a further improvement, the water inlet of the furnace inner water chamber and the communicating pipe are respectively arranged at the two sides of the furnace inner water chamber, and the overflow port of the water replenishing tank and the water inlet of the furnace inner water chamber are arranged at the same side.

As the utility model discloses a further improvement, the highest point of stove hydroecium, moisturizing case and each airtight heat exchange water tank is equipped with the blast pipe that upwards extends respectively, and discharge valve and install the decurrent exhaust return bend of export respectively are installed to the top of each blast pipe, and the level gauge is installed to the lateral wall of moisturizing case.

Compared with the prior art, the utility model discloses following beneficial effect has been obtained: 1. under the condition of locally reforming the skid-mounted gas heating furnace without changing the main structure of the skid-mounted gas heating furnace, the running time of a burner is improved to the maximum extent, namely the utilization rate of the skid-mounted gas heating furnace is improved, the temperature of produced liquid of an oil well, liquid carbon dioxide or other liquid needing to be heated is raised, and the raised temperature can meet the safety production of the oil well or other equipment; the utilization rate of medium frequency and electric heating rods in oil well production can be avoided, green and energy-saving production of an oil well is promoted, and the exploitation cost of the oil well is reduced.

2. The device can be suitable for single wells of oil fields and the condition that a well site has a plurality of oil wells, can be expanded step by step according to the distance from a skid-mounted gas heating furnace, completely meets the safe gas heating distance of each oil well, can radiate temperature raising of dispersing equipment, processes and the like which take the heating furnace as the central radius within 200 meters, solves the temperature raising of liquid carbon dioxide ground drive temperature raising and low-yield low-liquid-content oil wells, reduces the back pressure of a conveying pipeline, and improves the production safety.

3. By using the casing natural gas associated with the oil well as the fuel, the energy problem of the skid-mounted gas heating furnace is solved, the emission and waste of scattered natural gas are reduced, the running stability and running efficiency of the skid-mounted gas heating furnace are improved, the oil outlet effect of the oil well can be improved due to the reduction of casing pressure, and the investment recovery period of the oil well is greatly shortened.

4. The safety system requirement of sled dress gas heating furnace normal pressure operation is satisfied completely, avoids the top of furnace body water tank to produce the gasification, stops false overtemperature alarm, and the temperature of furnace body water tank can directly set up more than 90 ℃, and the greatly reduced opens and stops the frequency, improves sled dress gas heating furnace operation's stability.

Drawings

The invention will be described in further detail with reference to the drawings and the detailed description, which are provided for reference and illustration purposes only and are not intended to limit the invention.

FIG. 1 is a front view of a skid-mounted gas heating furnace according to the present invention;

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a top view of FIG. 1;

FIG. 4 is a flow chart of a first embodiment of the system for increasing temperature of a fluid in a well site of an oilfield according to the present invention;

FIG. 5 is a flow chart of a second embodiment of the system for increasing temperature of a fluid in a well site of an oilfield according to the present invention;

FIG. 6 is a flow chart of a third embodiment of the system for increasing the temperature of a fluid in a well site of an oilfield according to the present invention;

fig. 7 is a flow chart of a fourth embodiment of the system for increasing temperature of a fluid in a well site of an oil field according to the present invention.

In the figure: 1. skid-mounted gas heating furnaces; 1a, a hearth; 1b, a smoke tube; 1c, putting the tobacco into a tobacco chamber; 1d, a total smoke exhaust pipe; 1e, a water chamber in the furnace; 1f, a water inlet of a water chamber in the furnace; 1g, coiling a pipe in a furnace; 1g1. furnace coil inlet; 1g2. furnace coil outlet; 1h, a burner interface; 2. a water replenishing tank; 2a, an overflow port of a water replenishing tank; 3. a communicating pipe; 3a, a water replenishing valve; 4. an open heat exchange water tank; 4a, an open water tank coil pipe; 5. a first sealed heat exchange water tank; 5a, a first closed water tank coil; 6. a second closed heat exchange water tank; 6a, a second closed water tank coil; 7. a third heat exchange water tank is sealed; 7a, a closed water tank coil pipe III; p1, a hot water circulating pump I; p2, a hot water circulating pump II; p3, a hot water circulating pump III; G1. a heat-preservation water inlet pipe; G2. a heat preservation water outlet pipe; G3. a first return pipeline; G4. a second return pipeline; v1. a circulating pump inlet valve; v2, a circulating pump bypass valve; v3. circulation pump outlet valve; v4. a check valve; l1, a first pipeline type filter; l2, a second pipeline type filter; and L3, a pipeline type filter III.

Detailed Description

In the following description of the present invention, the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not mean that the device must have a specific orientation.

As shown in fig. 1 to 4, the utility model discloses an oil field well site fluid system of raising temperature is including installing skid-mounted gas heating furnace 1 near a certain oil well, guarantee safe distance more than 30 meters between skid-mounted gas heating furnace 1 and the oil well, the lower part of skid-mounted gas heating furnace 1 is equipped with furnace 1a, furnace 1a periphery and top are all surrounded by stove hydroecium 1e, furnace 1a front side is equipped with combustor interface 1h, install the combustor in the combustor interface 1h, the combustor adopts the sleeve pipe natural gas of oil well companion to be the fuel. The furnace coil 1g is arranged in the furnace water chamber 1e, and two ends of the furnace coil 1g are connected in series in a temperature raising pipeline of an oil well. The heating of the medium of the oil well I closest to the skid-mounted gas heating furnace 1 is directly realized by the coil pipe 1g in the furnace, the heated medium can be the produced fluid of the oil well I and the reinjected liquid carbon dioxide, and the heating object can be an oil well pipeline node, a well mouth or other equipment needing heating.

The upper superpose of stove hydroecium 1e has inclosed moisturizing box 2, and the level gauge is installed to the lateral wall of moisturizing box 2, and the bottom of moisturizing box 2 passes through communicating pipe 3 and links to each other with the bottom lateral wall of stove hydroecium 1e, and the roof of moisturizing box 2 is connected with moisturizing box overflow mouth 2a, and the bore of moisturizing box overflow mouth 2a is more than DN40 mm. The side wall of the top of the furnace water chamber 1e is welded with a furnace water chamber water inlet 1f, and the caliber of the furnace water chamber water inlet 1f is more than DN25 mm.

As an embodiment one of the utility model, an open heat exchange water tank 4 is arranged near an oil well II adjacent to the oil well I, a safety distance of more than 30 meters is ensured between the open heat exchange water tank 4 and the oil well II, an open water tank coil 4a is arranged in the open heat exchange water tank 4, and two ends of the open water tank coil 4a are connected in series in a temperature raising pipeline of the oil well II; the open water tank coil 4a solves the medium heating of the second oil well, the heated medium can be the produced fluid of the second oil well and the reinjected liquid carbon dioxide, and the heating object can be an oil well pipeline node, a well head or other equipment needing heating.

The bottom outlet of the open heat exchange water tank 4 is connected with the inlet of a hot water circulating pump P1, a circulating pump inlet valve V1 and a pipeline filter L1 are installed at the inlet of the hot water circulating pump P1, a circulating pump outlet valve V3 is installed at the outlet of the hot water circulating pump P1, a circulating pump bypass valve V2 is installed between the outlet of the circulating pump inlet valve V1 and the inlet of the circulating pump outlet valve V3, the outlet of the circulating pump outlet valve V3 is connected with a water inlet 1f of a water chamber in the furnace through a heat-preservation water inlet pipe G1, and a check valve V4 is installed at the water inlet 1f of the water chamber in the furnace. The overflow port 2a of the water replenishing tank is connected with the top inlet of the open heat exchange water tank 4 through a heat preservation water outlet pipe G2.

The combustor burns the sleeve natural gas associated with the oil well, flame is sprayed into the hearth 1a, high-temperature flue gas upwards enters each smoke tube 1b and then enters the upper smoke chamber 1c, the circulating water in the water chamber 1e in the furnace is heated by the outer walls of the hearth 1a, each smoke tube 1b and the upper smoke chamber 1c, and the cooled flue gas is discharged from the upper end of the main smoke exhaust pipe 1d.

Water in the open heat exchange water tank 4 enters the first pipeline filter L1 through a circulating pump inlet valve V1 for filtration, the filtered circulating water is sent out by a hot water circulating pump P1, and enters the upper part of the furnace water chamber 1e through a circulating pump outlet valve V3, a heat preservation inlet pipe G1, a check valve V4 and a furnace water chamber water inlet 1f, the circulating water with lower temperature flows downwards, the heated hot water flows upwards, and the uniform mixing of the hot water in the furnace water chamber 1e is facilitated. The water inlet 1f of the water chamber in the furnace is positioned at the upper part of the water chamber 1e in the furnace, so that the water chamber 1e in the furnace can operate at full water level, and no gas building space exists at the upper part. The water inlet 1f of the water chamber in the furnace and the communicating pipe 3 are respectively positioned at two sides of the water chamber 1e in the furnace, so that the hot water in the water chamber 1e in the furnace can be uniformly mixed. Hot water in the water chamber 1e in the furnace enters the communicating pipe 3 from the other side of the bottom, and flows upwards along the communicating pipe 3 into the water replenishing tank 2.

The overflow port 2a of the water replenishing tank is led out from the top wall of the water replenishing tank 2, so that the inner cavity of the water replenishing tank can be filled with hot water, and no air-holding space exists. The overflow port 2a of the water replenishing tank and the communicating pipe 3 are respectively positioned at two sides of the water replenishing tank 2, so that hot water is uniformly mixed in the water replenishing tank 2, and short flow is avoided. The hot water flows out of the water replenishing tank 2 and then returns to the open heat exchange water tank 4 through the heat preservation water outlet pipe G2 to circulate, and the open water tank coil 4a is indirectly heated.

The system changes an open water replenishing tank 2 on the top of the furnace into a closed structure, runs in full water overflow, changes a pipeline for replenishing water to a water chamber in the furnace from the water replenishing tank 2 into a communicating pipe 3 for reverse circulation, changes the water chamber 1e in the furnace from high-water-level running into totally-enclosed full-water-level running, realizes the normal-pressure running of the skid-mounted gas heating furnace 1 through an open heat exchange water tank 4 near an oil well II, and still ensures that the requirements of oil field safety operation regulations are met.

The coil pipe 1g in the furnace is responsible for heating the first output liquid of the oil well and the like, and the open water tank coil pipe 4a is responsible for heating the second output liquid of the oil well and the like, so that the use of power consumption equipment such as intermediate frequency and electric heating rods can be avoided, the investment cost of the heating furnace and the power consumption cost of a well site are reduced, the exploitation cost is reduced, and the production safety is improved.

Through changing the furnace hydroecium 1e and moisturizing case 2 into full room operation, and keeping away from sled dress gas heating furnace 1 and being close to near two oil wells and being equipped with uncovered heat exchange water tank 4, the capacity of the circulating water of greatly increased has slowed down the temperature fluctuation of circulating water, has also increased hot water heating's load. The temperature of the water tank of the furnace body can be directly set to more than 90 ℃ for furnace shutdown, and the startup and shutdown frequency of the skid-mounted gas heating furnace 1 is greatly reduced under the condition that the temperature is lower than 80 ℃ for furnace startup, so that the utilization rate of the skid-mounted gas heating furnace 1 is improved.

The collecting pipe at the lower end of the coil pipe 1g in the furnace extends out of the lower end of the side wall of the water chamber 1e in the furnace to form a coil pipe inlet 1g1 in the furnace, and the collecting pipe at the upper end of the coil pipe 1g in the furnace extends out of the upper end of the side wall of the water chamber 1e in the furnace to form a coil pipe outlet 1g2 in the furnace; the entry of each water tank coil pipe all is located the lower extreme, and the export of each water tank coil pipe all is located the upper end. The medium to be heated is in a low-in and high-out mode, and heating is more uniform.

The roof of furnace 1a is connected with many tobacco pipes 1b that upwards extend, and the upper end of each tobacco pipe 1b links to each other with last smoke chamber 1c respectively, and the top center of going up smoke chamber 1c is connected with the total pipe 1d of discharging fume that upwards extends, and moisturizing case 2 encircles in the periphery of total pipe 1d of discharging fume, makes the structure compacter, and is favorable to moisturizing case 2 to have bigger volume.

The furnace coil 1g is located between the furnace chamber 1a and the upper smoke chamber 1c and is wound around the outer periphery of the smoke tube bundle.

The lower end of the communicating pipe 3 is connected with the middle port of the water replenishing tee joint, the inner port of the water replenishing tee joint is connected with the bottom side wall of the water chamber 1e in the furnace, and the outer port of the water replenishing tee joint is connected with a water replenishing pipeline through a water replenishing valve 3a. The operation loss of the whole circulating water system is very small, and circulating water can be supplemented to the system through the water supplementing valve 3a at the initial operation stage of the system or after the system is operated for a long time.

The highest positions of the water chamber 1e in the furnace, the water replenishing tank 2 and each sealed heat exchange water tank are respectively provided with an exhaust pipe extending upwards, the top of each exhaust pipe is respectively provided with an exhaust valve and an exhaust bent pipe with a downward outlet, and the side wall of the water replenishing tank is provided with a liquid level meter. Non-condensable gas in the system is conveniently discharged when water is injected before operation, so that the system is more stable in operation.

As shown in fig. 5, in the second embodiment of the present invention, for the well site of the three oil wells, a first closed heat exchange water tank 5 is disposed in the vicinity of the first oil well and the second oil well adjacent to the first oil well, a first closed water tank coil 5a is disposed in the first closed heat exchange water tank 5, and two ends of the first closed water tank coil 5a are connected in series to the third temperature raising pipeline of the oil well; the bottom outlet of the open heat exchange water tank 4 is also connected with the inlet of a hot water circulating pump II P2, the outlet of the hot water circulating pump II P2 is connected with the bottom inlet of the first closed heat exchange water tank 5 through a heat-preservation water inlet pipe G1, and the upper outlet of the first closed heat exchange water tank 5 is connected with the upper water return port of the open heat exchange water tank 4 through a heat-preservation water outlet pipe G2.

The whole system has the advantages that the open heat exchange water tank 4 is arranged, so that the normal-pressure operation of the skid-mounted gas heating furnace 1 is ensured, and the closed heat exchange water tank I5 can be adopted near the oil well III so as to reduce the evaporation of water. Water in the open heat exchange water tank 4 is filtered by the second pipeline type filter L2, is sent out by the second hot water circulating pump P2, enters the bottom of the first closed heat exchange water tank 5, indirectly heats the first closed water tank coil pipe 5a, flows out of the upper part of the first closed heat exchange water tank 5, and returns to the middle circulation of the open heat exchange water tank 4. And heating is provided for a third oil well which is farther away from the first oil well by the closed water tank coil pipe (5 a).

As shown in fig. 6, in the third embodiment of the present invention, for a well site of a multi-well, a second airtight heat exchange water tank 6 is disposed near a fourth oil well which can be far away from a second oil well and is adjacent to the third oil well, a second airtight water tank coil 6a is disposed in the second airtight heat exchange water tank 6, and two ends of the second airtight water tank coil 6a are connected in series to a fourth temperature raising pipeline of the oil well; the bottom outlet of the first closed heat exchange water tank 5 is also connected with the inlet of a hot water circulating pump III P3, the outlet of the hot water circulating pump III P3 is connected with the bottom inlet of a second closed heat exchange water tank 6 through a heat-preservation water inlet pipe G1, and the upper outlet of the second closed heat exchange water tank 6 is connected with the upper water return port of the first closed heat exchange water tank 5 through a heat-preservation water outlet pipe G2. To the well site of more oil wells, can be as above step by step to keeping away from the oil well heat supply of sled dress gas heating furnace 1 more, so all can realize utilizing the burning heat of sleeve pipe gas to carry out the well site heating, all wellheads all can stop the use of power consumptive equipment such as intermediate frequency, electric heating rod to reduce the power consumption cost.

And water in the first closed heat exchange water tank 5 is filtered by a third pipeline type filter L3, is sent out by a third hot water circulating pump P3, enters the bottom of a second closed heat exchange water tank 6, indirectly heats a coil pipe 6a of the second closed heat exchange water tank, flows out from the upper part of the second closed heat exchange water tank 6, and returns to the first closed heat exchange water tank 5 for circulation. And the temperature raising heating is provided for an oil well four which is farther away from the oil well one through the closed water tank coil pipe two 6a. And (3) carrying out high-lift cultivation on the first hot water circulating pump P1, the second hot water circulating pump P2, the third hot water circulating pump P3 and the like at a speed of less than or equal to 10m, and carrying out high-speed cultivation at a discharge capacity of more than or equal to 1.5 m/h.

As shown in fig. 7, in the fourth embodiment of the present invention, a first closed heat exchange water tank 5 is disposed near a first oil well and a second oil well adjacent to the first oil well, a first closed water tank coil 5a is disposed in the first closed heat exchange water tank 5, and two ends of the first closed water tank coil 5a are connected in series to a third temperature raising pipeline of the oil well; the bottom outlet of the open heat exchange water tank is also connected with the inlet of a hot water circulating pump II P2, the outlet of the hot water circulating pump II P2 is connected with the bottom inlet of a closed heat exchange water tank I5 through a heat-preservation water inlet pipe, the upper outlet of the other side of the closed heat exchange water tank I5 is connected with the bottom inlet of a closed heat exchange water tank II 6 through a heat-preservation water outlet pipe, a closed water tank coil II 6a is arranged in the closed heat exchange water tank II 6, and two ends of the closed water tank coil II 6a are connected in series in a four-temperature raising pipeline of the oil well; an upper outlet on the other side of the closed heat exchange water tank II 6 is connected with an upper water return port of the open heat exchange water tank 4 through a first return pipeline G3.

In order to avoid the defect that the water temperature of the far sealed heat exchange water tank in the third implementation mode is excessively reduced, the bottom outlets of the heat exchange water tank 4, which are sequentially opened from near to far, of the skid-mounted gas heating furnace 1, namely an oil well I, an oil well II, an oil well III, an oil well IV and an oil well V … …, are also connected with the inlet of a hot water circulating pump III P3, the outlet of the hot water circulating pump III P3 is connected with the bottom inlet of the sealed heat exchange water tank III 7 through a heat-insulation water inlet pipe, a sealed water tank coil III 7a is arranged in the sealed heat exchange water tank III 7, and two ends of the sealed water tank coil III 7a are connected in series in a five-temperature raising pipeline of the oil well; an upper outlet on the other side of the closed heat exchange water tank III 7 is connected with an upper water return port of the open heat exchange water tank 4 through a second return pipeline G4. For other more distant oil wells, the expansion can be carried out according to the scheme of oil well five.

For example, a skid-mounted gas heating furnace drives a 3000-liter open heat exchange water tank and a 200-liter closed heat exchange water tank, wherein the 3000-liter open heat exchange water tank is used for injecting liquid carbon dioxide for 20 tons/day, and the 200-liter closed heat exchange water tank is used for heating oil well outlet liquid (2 tons/day). Compared with the prior art, the starting of the electric heating rod is reduced by 3 multiplied by 15KW, and the electric energy is saved by 675 kwh/d; the electric tracing intermediate frequency (35 KWA) opening of the oil well is reduced, and the electric energy is saved by 261 kwh/d; the total is 936kwh/d, and the annual saving is 34.16 ten thousand kwh.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention. In addition to the above embodiments, the present invention may have other embodiments. All the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope claimed by the present invention.

Claims (10)

1. The utility model provides an oil field well site fluid system of raising temperature, is including being located the skid-mounted gas heating furnace near a certain oil well, the skid-mounted gas heating furnace is including being located the stove hydroecium of furnace periphery and top, built-in stove coil pipe in the stove hydroecium, its characterized in that: two ends of the coil pipe in the furnace are connected in series in a temperature raising pipeline of an oil well; a closed water replenishing tank is superposed above the water chamber in the furnace, the bottom of the water replenishing tank is connected with the side wall of the bottom of the water chamber in the furnace through a communicating pipe, the top wall of the water replenishing tank is connected with an overflow port of the water replenishing tank, and the side wall of the top of the water chamber in the furnace is welded with a water inlet of the water chamber in the furnace; an open heat exchange water tank is arranged near the oil well II adjacent to the oil well I, an open water tank coil is arranged in the open heat exchange water tank, and two ends of the open water tank coil are connected in series in a temperature raising pipeline of the oil well II; the bottom outlet of the open heat exchange water tank is connected with the inlet of a hot water circulating pump I, the outlet of the hot water circulating pump I is connected with the water inlet of the water chamber in the furnace through a heat preservation water inlet pipe, and the overflow port of the water replenishing tank is connected with the top inlet of the open heat exchange water tank through a heat preservation water outlet pipe.

2. The oilfield wellsite fluid warming system of claim 1, wherein: a first closed heat exchange water tank is arranged near a third oil well which is far away from the first oil well and is adjacent to the second oil well, a first closed water tank coil is arranged in the first closed heat exchange water tank, and two ends of the first closed water tank coil are connected in series in a third temperature raising pipeline of the oil well; and the outlet at the bottom of the open heat exchange water tank is also connected with the inlet of a hot water circulating pump II, the outlet of the hot water circulating pump II is connected with the inlet at the bottom of the closed heat exchange water tank I through a heat-preservation water inlet pipe, and the outlet at the upper part of the closed heat exchange water tank I is connected with the upper water return port of the open heat exchange water tank through a heat-preservation water outlet pipe.

3. The oilfield wellsite fluid warming system of claim 2, wherein: a second closed heat exchange water tank is arranged near a fourth oil well which is far away from the second oil well and is adjacent to the third oil well, a second closed water tank coil is arranged in the second closed heat exchange water tank, and two ends of the second closed water tank coil are connected in series in a fourth temperature raising pipeline of the oil well; the bottom outlet of the first closed heat exchange water tank is also connected with the inlet of a hot water circulating pump III, the outlet of the hot water circulating pump III is connected with the bottom inlet of the second closed heat exchange water tank through a heat-preservation water inlet pipe, and the upper outlet of the second closed heat exchange water tank is connected with the upper water return port of the first closed heat exchange water tank through a heat-preservation water outlet pipe; thus, heat is supplied to the oil well far away from the skid-mounted gas heating furnace step by step.

4. The oilfield wellsite fluid warming system of claim 1, wherein: a first closed heat exchange water tank is arranged near a third oil well which is far away from the first oil well and is adjacent to the second oil well, a first closed water tank coil is arranged in the first closed heat exchange water tank, and two ends of the first closed water tank coil are connected in series in a third temperature raising pipeline of the oil well; the bottom outlet of the open heat exchange water tank is also connected with the inlet of a hot water circulating pump II, the outlet of the hot water circulating pump II is connected with the bottom inlet of the closed heat exchange water tank I through a heat-preservation water inlet pipe, the upper outlet of the other side of the closed heat exchange water tank I is connected with the bottom inlet of the closed heat exchange water tank II through a heat-preservation water outlet pipe, a closed water tank coil II is arranged in the closed heat exchange water tank II, and two ends of the closed water tank coil II are connected in series in a temperature raising pipeline of the oil well IV; and an upper outlet on the other side of the closed heat exchange water tank II is connected with an upper water return port of the open heat exchange water tank through a first return pipeline.

5. The oilfield wellsite fluid warming system of claim 4, wherein: the bottom outlet of the open heat exchange water tank is also connected with the inlet of a hot water circulating pump III, the outlet of the hot water circulating pump III is connected with the bottom inlet of a closed heat exchange water tank III through a heat-preservation water inlet pipe, a closed water tank coil III is arranged in the closed heat exchange water tank III, and two ends of the closed water tank coil III are connected in series in a five-temperature raising pipeline of the oil well; and an upper outlet on the other side of the closed heat exchange water tank III is connected with an upper water return port of the open heat exchange water tank through a second return pipeline.

6. The oilfield wellsite fluid warming system of any one of claims 1-5, wherein: the collecting pipe at the lower end of the coil pipe in the furnace extends out of the lower end of the side wall of the water chamber in the furnace to form an inlet of the coil pipe in the furnace, and the collecting pipe at the upper end of the coil pipe in the furnace extends out of the upper end of the side wall of the water chamber in the furnace to form an outlet of the coil pipe in the furnace; the entry of each water tank coil pipe all is located the lower extreme, and the export of each water tank coil pipe all is located the upper end.

7. The oilfield wellsite fluid warming system of claim 1, wherein: the top wall of the hearth is connected with a plurality of smoke pipes extending upwards, the upper ends of the smoke pipes are respectively connected with an upper smoke chamber, the center of the top of the upper smoke chamber is connected with a main smoke exhaust pipe extending upwards, and the water replenishing tank surrounds the periphery of the main smoke exhaust pipe; the coil pipe in the furnace is positioned between the hearth and the upper smoke chamber and is coiled on the periphery of the smoke pipe bundle.

8. The oilfield wellsite fluid warming system of claim 1, wherein: the lower end of the communicating pipe is connected with a middle port of the water replenishing tee joint, an inner port of the water replenishing tee joint is connected with the side wall of the bottom of the water chamber in the furnace, and an outer port of the water replenishing tee joint is connected with a water replenishing pipeline through a water replenishing valve.

9. The oilfield wellsite fluid warming system of claim 1, wherein: the water inlet of the water chamber in the furnace and the communicating pipe are respectively positioned at two sides of the water chamber in the furnace, and the overflow port of the water replenishing tank and the water inlet of the water chamber in the furnace are positioned at the same side.

10. The oilfield wellsite fluid warming system of claim 3, wherein: exhaust pipes extending upwards are respectively arranged at the highest positions of the water chamber in the furnace, the water replenishing tank and each closed heat exchange water tank, and an exhaust valve and an exhaust bent pipe with a downward outlet are respectively arranged at the top of each exhaust pipe; the side wall of the water replenishing tank is connected with a liquid level meter.

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