CN115199253A - Self-adaptive sand removing and washing device for wellhead gathering and transportation pipeline - Google Patents
Self-adaptive sand removing and washing device for wellhead gathering and transportation pipeline Download PDFInfo
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- CN115199253A CN115199253A CN202210817251.3A CN202210817251A CN115199253A CN 115199253 A CN115199253 A CN 115199253A CN 202210817251 A CN202210817251 A CN 202210817251A CN 115199253 A CN115199253 A CN 115199253A
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- 239000004576 sand Substances 0.000 title claims abstract description 160
- 238000005406 washing Methods 0.000 title claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 45
- 238000000926 separation method Methods 0.000 claims abstract description 42
- 238000003860 storage Methods 0.000 claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 238000011084 recovery Methods 0.000 claims description 32
- 238000007789 sealing Methods 0.000 claims description 19
- 239000002352 surface water Substances 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000010779 crude oil Substances 0.000 abstract description 13
- 235000017166 Bambusa arundinacea Nutrition 0.000 abstract description 4
- 235000017491 Bambusa tulda Nutrition 0.000 abstract description 4
- 241001330002 Bambuseae Species 0.000 abstract description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 abstract description 4
- 239000011425 bamboo Substances 0.000 abstract description 4
- 239000003027 oil sand Substances 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 239000002131 composite material Substances 0.000 abstract description 2
- 238000000605 extraction Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 238000003911 water pollution Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 25
- 238000005457 optimization Methods 0.000 description 8
- 239000007921 spray Substances 0.000 description 8
- 239000012530 fluid Substances 0.000 description 6
- 238000007599 discharging Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 230000008719 thickening Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
- E21B43/35—Arrangements for separating materials produced by the well specially adapted for separating solids
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Abstract
A self-adaptive sand removing and washing device for a wellhead gathering and transportation pipeline. The method is characterized in that: the device comprises a rotational flow cavity, a separation cavity, a neck widening cavity, a sand removing cylinder, a sand storage cylinder and a hydrocyclone; the front end of the rotational flow cavity is provided with a guide vane; the wide neck cavity variable-pressure cone is welded on the outer flange of the wide neck cavity and is limited in the pipeline; the cyclone cavity, the separation cavity and the neck widening cavity are inserted and penetrate through the desanding cylinder, and a gap at the contact part of the cyclone cavity, the separation cavity and the neck widening cavity is sealed by using a collar; the inside shower nozzle that is equipped with of sand storage section of thick bamboo, the shower nozzle passes through rubber composite pipe with the water tank and is connected, and sand discharge mouth is equipped with to sand storage section of thick bamboo bottom simultaneously. This device can realize the extraction liquid at pipeline's stable flow, can also wash and retrieve the system of advancing with the crude oil that adheres on the grit in high-efficient degritting, prevents that the condition that the oil sand pollutes from taking place, has reduced water pollution simultaneously, and the science has utilized well head to come hydraulic pressure difference and two inertia differences of solid-liquid, and whole separation process has high efficiency and low energy consumption nature.
Description
Technical Field
The invention relates to a wellhead sand removing and washing device applied to the field of oil and gas field development.
Background
When crude oil is produced from downhole, the sand content in the crude oil increases as the production depth increases. Although a series of measures such as sand prevention and sand blockage are taken, sand grains are inevitably brought into a crude oil gathering and transportation system due to high viscosity of crude oil. If the crude oil containing sand is directly transported in a ground gathering pipeline without being processed, the quality of the crude oil can be influenced, meanwhile, a gathering and transporting system at a wellhead can be damaged, and even the environment is polluted. The deposition of sand in pipelines and surface equipment can cause wear of such equipment, reduce the handling capacity of the equipment, and in severe cases, can lead to plugging of pipelines and process equipment, and can rapidly corrode the internal surfaces of valves and vessels, resulting in equipment failure. Therefore, the sand removing device of the oil field ground gathering and transportation system becomes important equipment for ensuring normal development of the oil and gas field. But the following technical problems to be solved of the existing sand removing device generally exist: when the produced liquid enters the separation and desanding device, the flow velocity of the produced liquid entering the device cannot be controlled, so that the produced liquid cannot be sufficiently separated due to too high flow velocity; some Xu Youye generally adheres to the separated and removed sand, and the sand cannot be recovered; in the sand washing and sand washing parts, part of devices use external water, so that resource waste and environmental pollution are caused.
Disclosure of Invention
In order to solve the technical problems mentioned in the background art, the invention provides a self-adaptive desanding and washing device for a wellhead gathering and transportation pipeline, which has the advantages of simple structure, ingenious design and easy disassembly and assembly, can realize the stability of the flow velocity of produced fluid entering the device, can clean oil sand while maximally separating and removing sand from the produced fluid, has the functions of re-sucking part of cleaned adhering oil fluid back to a transportation pipeline, prevents the oil sand from being polluted, and reduces water pollution.
The technical scheme of the invention is as follows:
the basic scheme is as follows: this kind of well head gathering pipeline self-adaptation desanding sand washer, including whirl chamber, disengagement chamber, broad neck chamber, desanding bucket, storage sand bucket, hydrocyclone, its unique characterized in that: the cyclone cavity is a seamless steel pipe, the liquid inlet is provided with a flange interface, the guide vane and the overflow area regulator are sequentially installed from the liquid inlet, the guide vane is installed on the flange and is clamped between the cyclone cavity flange and the liquid inlet flange, the guide vane, the cyclone cavity flange and the liquid inlet flange are fixed by screws, and the tail end of the cyclone cavity is provided with a conical surface and is also provided with a bolt.
The separation cavity is a hollow cylinder, sand discharge holes are uniformly distributed in the separation cavity, two ends of the separation cavity are connected with a sleeve in a welding mode, and two positioning grooves are formed in the bottom surface of the sleeve. One end of the sleeve is connected with the rotational flow cavity, and the other end of the sleeve is connected with the wide neck cavity.
The neck widening cavity comprises a neck widening tube, the tail end of the neck widening tube extends out of the positioning pin, and the positioning pin is matched with the positioning groove of the separation cavity;
the degritting bucket is hollow circular barrel, and the separation chamber is located inside the degritting bucket, and the degritting bucket left and right sides is opened there is the mounting hole, and the left and right sides mounting hole has all opened the internal thread, and the left side mounting hole will be broad neck chamber and be connected with the degritting section of thick bamboo and seal, and the right side mounting hole will swirl the chamber and be connected with the degritting section of thick bamboo and seal. The upper part of a sand removing barrel tank body is provided with a sand removing barrel flange, the upper part of the sand removing barrel is provided with a sealing top cover in a matching way, the lower part of the top cover is provided with the top cover flange, the sealing top cover and the sand removing barrel are fixed by bolts and are arranged on the sand removing barrel through 4 positioning holes, the sealing cover is provided with exhaust holes, a recovery pipe, a recovery bent pipe and a recovery straight pipe form an exhaust pipe, one end of the exhaust pipe is connected with the exhaust holes, the other end of the exhaust pipe is connected with a gas recovery hole, an oil recovery hole is connected with a wide neck pipe replacement hole, and the lower part of the sand removing barrel tank body is provided with a disconnecting valve connecting flange connected with an upper flange of a disconnecting valve;
the sand storage barrel is a container with certain taper at the upper part and the lower part, the liquid inlet is connected with a disconnecting valve flange, the sand discharge port is connected with a sand discharge valve flange, the wall surface of the sand storage barrel is respectively extended with 3 water inlets which are respectively connected with a straight joint, a pressure sensor is screwed in the sand storage barrel close to the upper part, the sand storage barrel is fixed by a welding bracket, the bracket is provided with a water tank, the water tank is connected with a water supply pipe, each water supply pipe is respectively connected with a ball valve, the upper water inlet is respectively connected with a self-spinning spray head, the bottom water inlet is connected with a spherical spray head, the side surface of the sand storage barrel is provided with a sand cleaning port, and a sealing cover is fixed with a sand cleaning port bolt;
the outside welding safety cover of hydrocyclone, import and pipe connection, the overflow mouth is connected with the ball valve, and the underflow opening has the external screw thread, screw in water tank top interface, and it has feed inlet and oil return opening to open on the pipeline, and near pipeline local thickening of oil return opening, feed inlet and oil return pipe all open there is the internal thread.
By applying the basic scheme, after sand-containing oil enters the device, the sand-containing oil is separated into the bottom sand storage device by cyclone separation, the oil part enters a subsequent pipeline, after the separated sand is accumulated to a certain degree at the bottom, the pressure alarm gives an alarm, the inlet pipeline is switched to a standby pipeline, the ball valve is closed, and the bottom sand discharge valve is opened for sand discharge.
On the basis of the basic scheme, optimization is carried out to obtain an optimized scheme 1, which comprises the following steps:
a positioning ring is welded in the middle section of an inner cavity of the rotational flow cavity, two ends of the spring are respectively welded with the conical barrel and the positioning ring, and the interior of the tail end of the rotational flow cavity is thickened to form a conical section;
the neck widening cavity also comprises a variable-pressure cone; the variable-pressure cone is welded on an outer flange of the variable-pressure cone, a neck widening pipe flange is arranged at the rear end of the neck widening pipe, the variable-pressure cone is placed in the neck widening pipe, the two flanges are fixedly connected, and a replacement hole is formed in the neck widening pipe at the position with the maximum outer diameter after the variable-pressure cone is fixed;
a hollow round pipe extends out of the upper part of the left side hole of the sand removing barrel tank body, a gas recovery hole is formed in the left side of the round pipe, and an oil liquid recovery hole is formed in the bottom of the round pipe; a sand blocking plate is arranged between the sand removing barrel and the sealing top cover, a recovery pipe, a recovery bent pipe and a recovery straight pipe are arranged to form an exhaust pipe, one end of the exhaust pipe is connected with an exhaust hole, the other end of the exhaust pipe is connected with a gas recovery hole, and an oil liquid recovery hole is connected with a wide neck pipe replacement hole;
a main pipeline of the hydraulic cyclone is provided with a feed inlet and an oil return port, an upper outlet pipeline of the hydraulic cyclone is in threaded connection with the oil return port, and a bottom flow port of the hydraulic cyclone is provided with external threads and is screwed into a water tank connector.
By optimizing the application of the scheme 1, the flow velocity adjusting device can be utilized after the crude oil produced liquid enters the device, so that the fluid passing through the device reaches a stable flow velocity state, and efficient sand removal is facilitated. Meanwhile, the baffle in the sand removing cylinder can prevent the sand which enters the sand storage cylinder from being remixed to enter a subsequent pipeline due to the impact of kinetic energy brought by the separation of the sand entering later. In addition, the variable-pressure cone of the wide-neck cavity part and the oil recovery device of the sand removing cylinder part can suck and recover oil adhered to sand again. The produced liquid after sand removal is further subjected to secondary separation by using a hydrocyclone, the separated oil is sucked again and recovered to a conveying pipeline, and meanwhile, the separated water can be used for washing sand, so that the pollution of external water is reduced, and the environment is protected.
On the basis of the optimization scheme 1, optimization is carried out to obtain an optimization scheme 2, which comprises the following steps:
the device also comprises a telescopic pipe, wherein the telescopic pipe comprises a male half pipe, a sealing ring and a female half pipe; the first bolt group and the second bolt group are used for connecting the male half pipe and the female half pipe, the first bolt group and the second bolt group are matched with each other to fix the telescopic pipe, and meanwhile, the telescopic pipe is connected with the rear flange of the outlet reversing valve to realize the limiting of the movement in the axial direction.
On the basis of the optimization scheme 2, optimization is carried out to obtain an optimization scheme 3, which comprises the following steps:
the device also comprises a set of spare pipelines, wherein each spare pipeline consists of a pipeline main body and an inlet reversing valve and an outlet reversing valve which are connected at two ends; the front flange and the rear flange of the inlet reversing valve are connected with an inlet device pipeline, the inlet pipeline flange is installed in front of the inlet device pipeline and connected with a wellhead produced liquid pipeline, the rear flange of the inlet reversing valve is connected with a cyclone cavity pipeline, the front flange and the rear flange of the outlet reversing valve are also provided with two flanges, the front flange of the outlet reversing valve is connected with a main pipeline flange, the rear flange of the outlet reversing valve is connected with a telescopic pipe, and two lifting lugs are installed on a pipeline main body.
The invention has the following beneficial effects: this device is with feed liquor interface and well head flange joint when using. When the oil well works, the two reversing valves are adjusted to cause forward flow, so that the wellhead produced liquid in the pipeline flows through the working pipeline, namely the cyclone cavity, the separation cavity and the wide neck cavity. The produced liquid flows through the guide vanes, is converted into a constant spiral flow state under the action of the flow area regulator, and flows through the separation cavity for solid-liquid separation, so that the sand removal of the produced liquid is realized. When a pressure gauge pointer installed on the sand storage barrel reaches a set pressure value, a cut-off valve connected with the sand removal barrel and the sand storage barrel is closed, a liquid inlet valve and an overflow valve of the cyclone are opened at the same time, a sand discharge valve is opened, the spherical spray head and the spin spray head are sequentially opened, and at the moment, crude oil adhered to the sand is cleaned by water in the water tank and recycled into the system, so that the sand washing function is realized; closing the valves after the sand discharging is finished, and opening a cut-off valve connecting the sand removing barrel and the sand storage barrel to complete a working cycle; when the main pipeline is overhauled, the reversing valve can be pulled to cause a deflection state, and the produced liquid is conveyed through the standby pipeline at the moment.
In addition, a sand baffle, an exhaust port, an oil discharge port and a variable pressure cone are additionally arranged in the optimization scheme, and the matching of a sand removal barrel and a wide neck cavity is changed in a hydraulic cyclone recovery section, so that the problem of oil and gas residue of the sand removal barrel is solved after the wellhead gathering and transportation pipeline self-adaptive sand removal and sand washing device is improved, and the safety and the high efficiency of the device are guaranteed.
In conclusion, the self-adaptive sand removing and washing device for the wellhead gathering and transportation pipeline is simple in structure, ingenious in design, easy to detach and install, capable of being overhauled under the condition that a well does not stop, and dependent on two inertia differences of liquid pressure and solid and liquid of the wellhead, the whole separation process has high efficiency and low energy consumption, and meanwhile, crude oil adhered to separated sand stones can be cleaned and recycled into a system, so that the oil sand pollution condition can be effectively prevented, and the device has great practical application value.
Description of the drawings:
FIG. 1 is an overall assembly drawing of the present invention.
FIG. 2 is a schematic view of the overall disassembled structure of the swirling chamber of the present invention.
FIG. 3 is a sectional view of the cyclone chamber of the present invention.
Fig. 4 is a schematic diagram of the structure of the separation chamber of the present invention.
FIG. 5 is a schematic view of the whole disassembled structure of the wide neck cavity of the present invention.
FIG. 6 is a schematic view of the disassembled structure of the sand removing barrel of the present invention.
Fig. 7 is a schematic view of the overall disassembled structure of the sand storage barrel of the invention.
FIG. 8 is a schematic view of the sand storage barrel and the connecting water tank according to the present invention.
Fig. 9 is a schematic view of a feedthrough structure of the present invention.
FIG. 10 is a schematic view of a hydrocyclone connection line configuration of the present invention.
Fig. 11 is a schematic view of the internal structure of a hydrocyclone according to the present invention.
FIG. 12 is a schematic cross-sectional view of the inlet and upper outlet of a hydrocyclone of the present invention.
Figure 13 is a schematic view of the overall disassembled structure of the telescopic tube of the present invention.
FIG. 14 is a schematic diagram of the alternate line configuration of the present invention.
Fig. 15 is a schematic view of the structure of the disconnection valve of the present invention.
Fig. 16 is a schematic view of the structure of the sand discharge valve of the invention.
In the figure, 1-a rotational flow cavity, 2-a separation cavity, 3-a neck widening cavity, 4-a sand removing barrel, 5-a sand storage barrel, 6-a hydrocyclone, 7-an inlet reversing valve, 8-a lifting lug, 9-a spare pipeline, 10-a sealing top cover, 11-a recovery pipe, 12-an outlet reversing valve, 13-a telescopic pipe, 14-a hydrocyclone liquid inlet pipe switch, 15-a hydrocyclone upper liquid outlet pipe switch, 16-a water tank, 17-a sealing cover, 18-a sand discharging valve, 19-a disconnecting valve, 20-a straight joint, 21-a pressure sensor, 22-a bracket, 23-a rotational flow cavity connecting flange plate, 24-a guide vane, 25-a guide vane flange plate, 26-a positioning ring, 27-a spring, 28-a conical barrel and 29-a conical section, 30-cyclone chamber positioning bolt, 31-cyclone chamber snap ring, 32-separation chamber positioning groove, 33-neck widening pipe, 34-pressure changing cone, 35-pressure changing cone outer flange, 36-neck widening pipe flange, 37-replacement hole, 38-neck widening pipe positioning pin, 39-neck widening chamber snap ring, 40-left mounting hole, 41-right mounting hole, 42-gas recovery hole, 43-oil recovery hole, 44-sand removing barrel flange, 45-top cover flange, 46-sand blocking plate, 47-positioning hole, 48-exhaust hole, 49-recovery bent pipe, 50-recovery straight pipe, 51-disconnecting valve connecting flange, 52-liquid inlet, 53-sand storing barrel flange, 54-sand discharging port, 55-sand storing barrel lower flange, 56-upper wall surface first liquid inlet, 57-upper wall second inlet, 58-lower wall inlet, 59-first inlet, 60-second inlet, 61-third inlet, 62-first self-rotating nozzle, 63-second self-rotating nozzle, 64-ball nozzle, 65-sand-cleaning port, 66-bolt set, 67-tank stand, 68-hydrocyclone protective jacket, 69-hydrocyclone inlet interface, 70-hydrocyclone first inlet, 71-hydrocyclone second inlet, 72-overflow, 73-upper outlet, 74-main, 75-underflow, 76-inlet, 77-return, 78-first local thickening, 79-second local thickening, 80-main flange, 81-extension tube, 82-male half, 83-seal, 84-female half, 85-first bolt set, 86-second bolt set, 87-front flange of outlet reversing valve, 88-rear flange of outlet reversing valve, 89-main body of reversing pipe, 90-front flange of inlet reversing valve, 91-92-rear flange of reversing valve, 94-rear flange of outlet valve, 93-lower flange, 94-opening flange device of inlet flange, 93-opening valve, and 93-lower flange device of inlet flange
The specific implementation mode is as follows:
the invention will be further described with reference to the accompanying drawings in which:
as shown in figure 1, the self-adaptive sand removing and washing device for the wellhead gathering and transportation pipeline comprises a cyclone cavity 1, a separation cavity 2, a wide neck cavity 3, a sand removing barrel 4, a sand storage barrel 5, a hydrocyclone 6 and other components, and is characterized in that:
as shown in fig. 2 combined with fig. 3 and fig. 6, the vortex chamber 1 is a hollow steel pipe, the front end of the vortex chamber 1 is welded with a flange plate 23, the front end of the guide vane 24 is welded with a flange plate 25, the flange plate 23 is in flange connection with the flange plate 25, and the rear end of the vortex chamber is provided with a flow area regulator; the overflow area regulator consists of a conical barrel, a spiral spring and a limiting ring, wherein the limiting ring is fixed on the pipeline, and the spiral spring is respectively welded on the limiting ring and the conical barrel; a positioning ring 26 is welded at a proper position in the pipeline, two ends of a spring 27 are respectively welded with a conical barrel 28 and the positioning ring 26, the tail end of a vortex cavity 1 is thickened to form a conical section 29, two positioning bolts 30 are symmetrically arranged at the joint of the tail end of the vortex cavity 1 and a separation cavity, a vortex cavity clamping ring 31 is connected with the vortex cavity 1 and a desanding barrel 4, and an external thread is arranged on the vortex cavity clamping ring 31; connectors 40 and 41 are symmetrically arranged on two sides of the desanding barrel, and the rotational flow cavity is matched with the rotational flow cavity clamping ring 31 and the positioning bolt 30 and is connected with the connector on one side of the desanding barrel. And a guide vane and a flow area regulator are sequentially arranged in the vortex cavity from the interface of the flange plate, and the tail end of the vortex cavity is thickened to form a conical surface.
As shown in fig. 4 in combination with fig. 3, 5 and 6, the separation chamber 2 is a hollow cylinder, which is provided with sand discharge holes uniformly distributed thereon, and two ends of the hollow cylinder are welded with a connecting sleeve, and the bottom surface of the sleeve is provided with two positioning grooves 32. One end of the sleeve is connected with the rotational flow cavity, and the other end of the sleeve is connected with the neck widening cavity; the separation cavity body passes through the sand removing barrel 4, the sand discharging hole is arranged downwards, and the positioning bolts 30 and 38 are respectively inserted into the positioning holes of the sleeves at the two ends.
As shown in fig. 5 in combination with fig. 3, 4 and 6, the wide neck cavity 3 is composed of a wide neck tube 33 and a variable-pressure cone 34; the neck widening pipe 33 is provided with a replacement hole 37, the tail end of the neck widening pipe extends out of a positioning pin 38, and the positioning pin 38 is matched with the positioning groove 32 on the separation cavity sleeve; the variable pressure cone 34 is connected with the wide neck pipe 33 by a flange, the replacing hole 37 is provided with threads, and forms an exhaust pipe together with the pipelines 11, 49 and 50, and is connected with the exhaust hole 48 on the sealing cover 10. The wide neck cavity variable-pressure cone is welded on the flange outside the wide neck cavity and is limited in the pipeline, and meanwhile, a recovery hole is formed in the maximum variable-pressure cone diameter position in the wide neck cavity.
As shown in fig. 6, the desanding barrel 4 is a hollow barrel, the separation cavity 2 is located inside the desanding barrel 4, mounting holes 40 and 41 are formed in the left side and the right side of the desanding barrel 4, the left side mounting hole 40 is in threaded connection with the wide neck cavity clamp ring 39, the wide neck cavity 3 is connected and sealed with the desanding barrel 4, the right side mounting hole 41 is in threaded connection with the rotational flow cavity clamp ring 31, and the rotational flow cavity 1 is connected and sealed with the desanding barrel 4. Remove 4 jar bodies of sand bucket left side hole tops and stretch out hollow pipe, open in the pipe left side has gas recovery hole 42, open the pipe bottom has fluid recovery hole 43, it is fixed with bolt and flange to utilize between sealing top cap 10 and the sand removal bucket 4, install between sand removal bucket 4 and sealing top cap 10 and hinder sand board 46, install on sand removal bucket 4 through 4 locating holes 47, it has exhaust hole 48 to open on the sealing top cap 10, recovery tube 11, retrieve return bend 49, it constitutes the blast pipe to retrieve straight tube 50, blast pipe one end connection exhaust hole 48, gas recovery hole 42 is connected to one end, fluid recovery hole 43 is connected with the wide pipe replacement hole 37 of neck, it has break valve flange 51 and break valve flange 94 to be connected to open 4 jar bodies of sand removal bucket below. The three parts of the rotational flow cavity, the separation cavity and the broad neck cavity are inserted and penetrate through the sand removing barrel, and the gap at the contact part of the rotational flow cavity, the separation cavity and the broad neck cavity is sealed by utilizing the collar.
As shown in fig. 7 and fig. 8, the sand storage barrel 5 is a hollow barrel with a certain taper at the top and bottom, the upper part of the hollow barrel is provided with a liquid inlet 52 connected with the cut-off valve 19, the lower part of the sand storage barrel 5 is provided with a sand discharge port 54 connected with the sand discharge valve 18, the wall surface of the sand storage barrel 5 is provided with upper wall surface water inlets 56 and 57 and a lower wall surface water inlet 58, the water inlets 56, 57 and 58 are respectively connected with the through joint 20, the pressure sensor 21 is screwed in the upper part of the sand storage barrel 5, the sand storage barrel 5 is fixed by the bracket 22, the bracket 22 is further provided with a water tank bracket 67 for supporting the water tank 16, the water tank 16 is connected with water pipes 59, 60 and 61, the water pipes 59 and 60 are connected with the through joint 20 at the upper wall surface water inlets 56 and 57, the water pipe 61 is connected with the through joint 20 at the lower wall surface water inlet 58, the lower wall surface water inlets 56 and 57 are respectively connected with spin nozzles 62 and 63, and the lower wall surface water inlet 58 is connected with the spherical nozzle 64.
As shown in fig. 10 with reference to fig. 11 and 12, the hydrocyclone 6 is installed in a protective sleeve 68, a hydrocyclone inlet port 69 is connected with hydrocyclone inlet pipes 70 and 71, a hydrocyclone inlet pipe switch 14 is additionally installed between the two pipes for controlling inlet liquid, a hydrocyclone overflow port 72 is connected with a hydrocyclone upper outlet pipe 73, liquid discharge is controlled by the hydrocyclone upper outlet switch, the tail end of the main pipe 74 is connected with an outlet reversing valve, the front end of the main pipe is connected with a wide neck pipe, a feed port 76 and an oil return port 77 are formed in the main pipe 74, pipes near the oil return port 77 are locally thickened 78 and 79, internal threads are formed in the feed port 76 and the oil return pipe 77, the pipe 71 is in threaded connection with the feed port 76, the hydrocyclone upper outlet pipe 73 is in threaded connection with the oil return port 77, and an external thread is formed in a hydrocyclone underflow port 75 and screwed into a water tank 16 port;
the device comprises a rotational flow cavity 1, a separation cavity 2, a wide neck cavity 3, a sand removing barrel 4, a sand storage barrel 5 and a hydrocyclone 6, wherein the connection relationship of the components is as follows: the separation cavity 2 is positioned in the sand removing barrel 4, the wide neck cavity 3 is arranged at the left end of the sand removing barrel 4, the rotational flow cavity 1 is arranged at the right end of the sand removing barrel 4, the flange interface at the lower end of the sand removing barrel 4 is connected with the upper end interface of the sand storage barrel 5 through the disconnecting valve flange 96, the hydraulic cyclone 6 and the components thereof are arranged on the bracket, and the interfaces are connected through corresponding pipelines.
The inlet and the discharge pipeline of the hydrocyclone are connected with a main conveying pipeline, and the lower drainage pipeline is connected with a water tank; a spray head is arranged in the sand storage cylinder, the spray head is connected with the water tank through a rubber composite pipe, and a sand discharge port is arranged at the bottom of the sand storage cylinder; this device can realize the stable flow of extraction liquid at pipeline, can also wash and retrieve the system of advancing with the crude oil that adheres on the grit when high-efficient degritting, and two inertia differences of liquid pressure difference and solid-liquid come at the rational utilization well head, and whole separation process has high efficiency and low energy consumption nature
When the device is used, the flange interface of the liquid inlet end is connected with the flange interface of the wellhead gathering pipeline by flanges, and then the telescopic pipe interface at the other end is connected with the flange of the subsequent pipeline. When the oil well works, the two reversing valves are adjusted to cause forward flow, so that the wellhead produced liquid in the pipeline flows through the working pipeline, namely the cyclone cavity, the separation cavity and the wide neck cavity. The produced liquid is converted into a constant spiral flow state under the action of the flow area regulator after flowing through the guide vanes, and flows through the separation cavity for solid-liquid separation, so that the sand removal of the produced liquid is realized. The separated sand is deposited in the sand storage barrel through the cut-off valve under the action of gravity and inertia force, when a pressure gauge pointer arranged on the sand storage barrel reaches a set pressure value, the cut-off valve connected with the sand removal barrel and the sand storage barrel is closed, meanwhile, a liquid inlet valve and an overflow valve of the cyclone are opened, a sand discharge valve is opened, the spherical spray head and a self-rotation spray head water inlet valve are sequentially opened, and at the moment, crude oil adhered to the sand stone is cleaned by water in the water tank and recycled into the system, so that the sand washing function is realized; closing the valves after the sand discharge is finished, and opening a ball valve connecting the sand removal barrel and the sand storage barrel to complete a working cycle; when the main pipeline is overhauled, the reversing valve is shifted to cause a deflection state, and the produced liquid is conveyed through the standby pipeline at the moment.
On the basis of the scheme, the following further improved scheme is obtained to solve the problem of never stopping the well for maintenance. The scheme is as follows: as shown in fig. 14, the device further comprises a spare pipeline 9, wherein the spare pipeline 9 comprises two reversing valves and a matched pipeline, a bearing lifting lug 8 is arranged on a pipeline main body 89, two ends of the pipeline main body are connected with the reversing valves 7 and 12, and the reversing valve 12 is connected with the telescopic pipe 13.
When the device is installed at a well head, a flange interface at the liquid inlet end of the device is connected with a flange interface of a gathering pipeline at the well head through a flange, and then an expansion pipe connector at the other end is connected with a flange of a subsequent pipeline and is adjusted to a working mode. Thus avoiding the damage of the crude oil containing sand to the ground gathering pipeline system.
Claims (4)
1. The utility model provides a well head gathering line self-adaptation sand removal washing unit, includes whirl chamber (1), separation chamber (2), broad neck chamber (3), removes sand bucket (4), stores up sand bucket (5) and hydrocyclone (6), its characterized in that:
the swirl cavity (1) is a seamless steel pipe, the front end of the swirl cavity (1) is welded with a swirl cavity connecting flange plate (23), the front end center column of a guide vane (24) is welded on a guide vane flange plate (25), the guide vane flange plate (25) is clamped between the swirl cavity connecting flange plate (23) and an outer flange of the conveying pipeline, and the swirl cavity connecting flange plate, the guide vane flange plate and the outer flange are connected by flanges; two vortex cavity positioning bolts (30) are symmetrically arranged at the joint of the tail end of the vortex cavity (1) and the separation cavity (2), the bolts (30) are connected with positioning grooves (32) on the separation cavity, the contact part of the vortex cavity (1) and the sand removal barrel (4) is sealed by utilizing a vortex cavity clamping ring (31), and meanwhile, an external thread is arranged on the vortex cavity clamping ring (31);
the separation cavity (2) is positioned inside the sand removing barrel (4), sand discharge holes are uniformly distributed in the separation cavity (2), two positioning grooves (32) are respectively formed in the left end and the right end of the separation cavity (2), one positioning groove is connected with the rotational flow cavity positioning bolt (30), and the other positioning groove is matched with the wide neck cavity positioning bolt (38);
the wide neck cavity (3) comprises a wide neck tube (33); a neck widening pipe positioning pin (38) extends out of the tail end of the neck widening pipe (33), the neck widening pipe positioning pin (38) is matched with the separation cavity positioning groove (32), a neck widening cavity clamping ring (39) is used for sealing the neck widening cavity (3) and the sand removal barrel (4), and an external thread is formed in the neck widening cavity clamping ring (39);
the sand removing barrel (4) is a hollow barrel, the separation cavity (2) is positioned inside the sand removing barrel (4), the left side and the right side of the sand removing barrel (4) are provided with a left side mounting hole (40) and a right side mounting hole (41) which are both provided with internal threads, the left side mounting hole (40) is in threaded connection with the wide neck cavity clamping ring (39), the wide neck cavity (3) is connected with the sand removing barrel (4) and is sealed, the right side mounting hole (41) is in threaded connection with the rotational flow cavity clamping ring (31), and the rotational flow cavity (1) is connected with the sand removing barrel (4) and is sealed; a desanding barrel flange (44) is arranged on the upper portion of the desanding barrel tank body, a sealing top cover (10) is arranged on the upper portion of the desanding barrel (4) in a matched mode, a top cover flange (45) is arranged below the top cover, the sealing top cover (10) and the desanding barrel (4) are fixed through bolts and are installed on the desanding barrel (4) through 4 positioning holes (47), an exhaust hole (48) is formed in the sealing cover (10), and a disconnecting valve connecting flange (51) is arranged below the desanding barrel (4) tank body and is connected with a disconnecting valve upper flange (94);
the sand storage barrel (5) is a hollow barrel with tapers at the upper part and the lower part, a liquid inlet (52) is arranged at the upper part, a sand storage barrel upper flange (53) connected with a break valve lower flange (95) is arranged at the same time, a sand discharge port (54) is arranged at the lower part of the sand storage barrel (5), a sand storage barrel lower flange (55) connected with a sand discharge valve flange (96) is arranged at the same time, an upper wall surface first water inlet (56), an upper wall surface second water inlet (57) and a lower wall surface water inlet (58) are reserved on the wall surface of the sand storage barrel (5), the three water inlets are respectively connected to a through joint (20), a pressure sensor (21) is screwed in the upper part of the sand storage barrel (5), the sand storage barrel (5) is fixed through a support (22), a water tank support (67) is arranged on the support (22) and used for supporting a water tank (16), a water pipe is connected to the water pipe which is connected to the through joint (20), a sand removal port (65) is arranged on the side surface of the sand storage barrel (5), and a sealing cover (17) and the sand removal port (65) are fixed through a bolt group (66);
hydrocyclone (6) dress is in protective sheath (68), hydrocyclone entry interface (69) are connected with swirler inlet pipe way (70), swirler inlet pipe way (70) are connected with pipeline (71) simultaneously, add between two pipelines and be equipped with swirler feed liquor pipe switch (14), outlet switch (15) are connected on swirler overflow mouth (72) and the swirler, outlet switch (15) are connected outlet pipe way (73) on the swirler, trunk pipe (74) end is opened there is trunk pipe flange (80), be connected with export switching-over valve front flange (88), pipe (3) flange joint is widely managed to front end and neck, feed inlet (76) and return oil pipe (77) are opened there is the internal thread, pipeline (71) and feed inlet (76) threaded connection.
2. The wellhead gathering pipeline self-adaptive sand removing and washing device as claimed in claim 1, wherein:
a positioning ring (26) is welded in the middle section of the inner cavity of the rotational flow cavity (1), a conical barrel (28) and the positioning ring (26) are respectively welded at two ends of a spring (27), and the interior of the tail end of the rotational flow cavity (1) is thickened to form a conical section (29);
the neck widening cavity (3) further comprises a variable-pressure cone (34); the variable-pressure cone (34) is welded on an outer flange (35) of the variable-pressure cone, a wide-neck pipe flange (36) is arranged at the rear end of the wide-neck pipe (33), the variable-pressure cone (34) is placed in the wide-neck pipe (33), the two flanges are fixedly connected, and a replacement hole (37) is formed in the wide-neck pipe (33) at the position with the largest outer diameter after the variable-pressure cone is fixed;
a hollow round pipe extends out of the upper part of a left hole of a tank body of the sand removing barrel (4), a gas recovery hole (42) is formed in the left side of the round pipe, and an oil liquid recovery hole (43) is formed in the bottom of the round pipe; a sand blocking plate (46) is arranged between the sand removing barrel (4) and the sealing top cover (10), a recovery pipe (11), a recovery bent pipe (49) and a recovery straight pipe (50) are arranged to form an exhaust pipe, one end of the exhaust pipe is connected with an exhaust hole (48), the other end of the exhaust pipe is connected with a gas recovery hole (42), and an oil liquid recovery hole (43) is connected with a wide neck pipe replacement hole (37);
a main pipe (74) of the hydrocyclone (6) is provided with a feed inlet (76) and an oil return opening (77), an upper outlet pipe (73) of the hydrocyclone is in threaded connection with the oil return opening (77), and a bottom flow opening (75) of the hydrocyclone is provided with external threads and is screwed into a connector of a water tank (16).
3. The wellhead gathering pipeline self-adaptive sand removing and washing device as claimed in claim 2, wherein:
the device also comprises a telescopic pipe (81), wherein the telescopic pipe (81) comprises a male half pipe (82), a sealing ring (83) and a female half pipe (84); the first bolt group (85) and the second bolt group (86) are used for connecting the male half pipe (82) and the female half pipe (84), the first bolt group (85) and the second bolt group (86) are matched with each other to fix the telescopic pipe (81), and meanwhile, the telescopic pipe (81) is connected with the rear flange (89) of the outlet reversing valve to achieve limiting of axial movement.
4. The wellhead gathering pipeline self-adaptive sand removing and washing device as claimed in claim 3, wherein:
the device also comprises a set of spare pipelines (9), wherein each spare pipeline (9) consists of a pipeline main body (89), and an inlet reversing valve (7) and an outlet reversing valve (12) which are connected at two ends; the front and the back of the inlet reversing valve are provided with two flanges, the front flange (90) of the inlet reversing valve is connected with an inlet device pipeline (92), the front of the inlet device pipeline is provided with an inlet pipeline flange (93) connected with a well head produced liquid pipeline, the back flange (91) of the inlet reversing valve is connected with a cyclone cavity pipeline (1), the front and the back of the outlet reversing valve (12) are also provided with two flanges, the front flange (87) of the outlet reversing valve is connected with a main pipeline flange (80), the back flange (88) of the outlet reversing valve is connected with a telescopic pipe (81), and the pipeline body is provided with two lifting lugs (8).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210817251.3A CN115199253B (en) | 2022-07-12 | 2022-07-12 | Self-adaptive sand removing and washing device for wellhead gathering pipeline |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210817251.3A CN115199253B (en) | 2022-07-12 | 2022-07-12 | Self-adaptive sand removing and washing device for wellhead gathering pipeline |
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| CN115199253A true CN115199253A (en) | 2022-10-18 |
| CN115199253B CN115199253B (en) | 2023-04-25 |
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| CN202210817251.3A Active CN115199253B (en) | 2022-07-12 | 2022-07-12 | Self-adaptive sand removing and washing device for wellhead gathering pipeline |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116696270A (en) * | 2023-07-28 | 2023-09-05 | 大庆市天德忠石油科技有限公司 | Sand-proof throttling well-killing manifold |
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| CN116696270B (en) * | 2023-07-28 | 2023-10-27 | 大庆市天德忠石油科技有限公司 | Sand-proof throttling well-killing manifold |
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