CN113738310A - Floating oil-collecting and sand-removing device for oil field waste liquid and operation method - Google Patents
Floating oil-collecting and sand-removing device for oil field waste liquid and operation method Download PDFInfo
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- CN113738310A CN113738310A CN202111110295.4A CN202111110295A CN113738310A CN 113738310 A CN113738310 A CN 113738310A CN 202111110295 A CN202111110295 A CN 202111110295A CN 113738310 A CN113738310 A CN 113738310A
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- waste liquid
- floating
- sand
- oil
- pipe
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/005—Waste disposal systems
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
Abstract
The invention provides an oil field waste liquid floating oil recovery sand removal device and an operation method. Relates to the technical field of cleaning of waste liquid pools in oil fields. The recovery system is connected with a sand-water separation system positioned outside the waste liquid pool through a floating manifold, and comprises a floating pontoon, and four horizontal directions of the floating pontoon are connected and fixed with four retraction mechanisms around the waste liquid pool through steel wire ropes. The invention has the following beneficial effects: the pulling through fixed hoist engine around the waste liquid pool realizes that the moving range of pontoon covers whole waste liquid pool, simultaneously fixed pontoon, drive on having replaced the pontoon, turn to, anchoring device, moreover, the steam generator is simple in structure, it floats and carries out the oil pumping operation at the crude oil liquid level to set up unsteady platform, can follow the decline of crude oil liquid level and pump oil simultaneously, the agitator mixes silt and sewage stirring and takes out, arrange outside after the sand-water separation, can be simultaneously to the crude oil in the waste liquid pool, silt is retrieved, the clearance, crude oil recovery rate is high, can clear up the silt of waste liquid pool full range, the availability factor in improvement waste liquid pool.
Description
The technical field is as follows:
the invention relates to the technical field of cleaning of waste liquid pools of oil fields, in particular to a floating oil recovery and sand removal device for waste liquid of an oil field and an operation method.
Background art:
when the oil field is used for treating the waste liquid, because of the environmental protection pressure and the requirement of reducing the polluted land, the prior storage pool for treating the waste liquid is a reinforced concrete structure built after digging a pit on the ground, at present, a steel structure coaming is adopted, a waste liquid pool with anti-seepage cloth is laid on the inner side of the coaming so as to be convenient to move, and simultaneously, the soil is not polluted, in the process of treating the waste liquid, a tank car is used for transporting the waste liquid to the waste liquid pool, and then the waste liquid enters the waste liquid pool through a pump for treatment, because the oil field waste liquid contains various impurities such as sewage, crude oil, silt and the like, along with the increase of the sewage treatment amount in the waste liquid, the crude oil and the silt in the waste liquid pool are more and more, until the sewage layer in the waste liquid pool is very thin, the whole waste liquid pool is occupied by the crude oil on the upper layer and the silt on the lower layer, the crude oil and the silt can be reused only after being cleaned, the crude oil in the waste liquid pool is pumped out by the pump at present, the inlet connecting hose of the pump is inserted into the waste liquid tank, an operator can raise the inlet height of the hose of the pump by experience and often insert the hose to an inappropriate depth, so that the pump is blocked or silt is pumped out, an excavator is adopted to clean the silt, the silt near the side of the tank can only be cleaned, and a bucket of the excavator cannot contact the anti-seepage cloth due to the fact that the bottom and the periphery of the waste liquid tank are provided with the anti-seepage cloth, and the cleaning is not thorough.
The invention content is as follows:
in order to solve the problems, the invention provides a floating oil collecting and sand removing device for oil field waste liquid and an operation method.
The technical scheme of the invention is as follows: the floating oil-collecting and sand-removing device for the waste liquid in the oil field comprises a recovery system and a sand-water separation system, wherein the recovery system is positioned in a waste liquid pool and is connected with the sand-water separation system positioned outside the waste liquid pool through a floating manifold;
the floating pontoon is a platform formed by welding and combining four square buoyancy bins and a steel structure, the buoyancy bins are positioned at four corners of the platform, the buoyancy bins are hollow thin-wall structures made of stainless steel, a support is arranged in the center of the platform, a speed reducing motor is arranged at the upper part of the support, a guide rail is arranged at the lower part of the support and connected with a lifting frame, a cross beam at the upper part of the lifting frame is fixedly connected with a screw nut, the screw nut is in threaded connection with a lead screw, the lead screw is connected with the speed reducing motor through a coupler, and the lower part of the lifting frame is fixedly connected with a sand pump; an oil pump is arranged between the two buoyancy bins on one side of the platform;
the sand-water separation system comprises a screw conveyor, the screw conveyor is installed at a rising angle, a cyclone separator is installed on the upper portion of an inlet of the screw conveyor, a waist of the cyclone separator is provided with a water inlet pipe entering tangentially, an overflow pipe of the cyclone separator is connected to the upper portion of a water tank, a reflux water pump and a liquid level meter are installed in the water tank, and an outlet pipeline of the reflux water pump extends into a waste liquid tank.
The winding and unwinding mechanism comprises a winch, a clamping seat is fixedly connected to the lower portion of the winch, the clamping seat is of an inverted U-shaped steel plate structure, a rubber plate is bonded to the inner side of a left steel plate of the clamping seat, a threaded hole is formed in a right steel plate of the clamping seat and connected with a trapezoidal bolt in a threaded mode, the inner side of the trapezoidal bolt is connected with a disc through a bearing and a hole check ring, the rubber plate is bonded to the inner side of the disc, the rubber plate is bonded to the bottom plane of a transverse steel plate of the clamping seat, a set of pulley block is fixedly connected to the outer side of the left steel plate of the clamping seat, the pulley block is composed of two adjacent pulleys and a framework, and the clamping seat is mounted at the upper end of a surrounding plate of a waste liquid pool and clamped to two sides of impermeable cloth surrounded on the waste liquid pool;
oblique-pulling section steel is welded on two sides of two guide rails of a bracket of the floating vessel respectively, a hanging ring is welded on the waist of each oblique-pulling section steel, and a steel wire rope of each winch penetrates through the middle of two pulleys and then is connected to the hanging ring of the floating vessel.
The floating manifold is composed of a plurality of sealed rotary joint flange connection steel pipes, wherein a plurality of sealed rotary joints in the vertical direction are connected with the steel pipes through elbows to form a pipeline group which can be opened and closed in the horizontal direction, the steel pipes at the lower part of the sealed rotary joints are fixedly connected with buoys, and the steel pipes at the upper part of the sealed rotary joints are fixedly connected with lifting rings;
the sealed rotary joint on one side of the pipeline group is connected with a steel pipe which is vertically upward through a flange, and the upper part of the steel pipe is connected with two sealed rotary joints in the horizontal direction and the steel pipe to form a rotary arm which can rotate up and down.
The outlet of the sand pump is connected with a sand outlet pipe, a one-way valve is arranged on a pipeline at the vertical part of the sand outlet pipe, the oil outlet pipe of the oil well pump is connected with the rear side of the one-way valve of the sand outlet pipe after being provided with the one-way valve, the sand outlet pipe connected with the upper side of the oil outlet pipe is connected with a sealing rotary joint in series, the rear side of the sealing rotary joint is converted into a transverse pipe flange through an elbow and connected with a floating manifold, and the floating manifold extends out of the waste liquid pool and is connected with a water inlet pipe of a sand-water separation system;
the pipeline at the lower part of the one-way valve of the sand pump is connected with the telescopic pipe through the fixed pipe, the telescopic pipe is inserted into the fixed pipe at the lower part, and the telescopic pipe is in clearance fit connection with the fixed pipe through the sealing ring.
The platform is provided with a control cabinet, and the house-entering main cable of the control cabinet is connected with the travelling crane cable drum and then is connected with a fixed power supply outside the waste liquid pool.
Install electric steam boiler on the platform, the check valve front end that goes out oil pipe is equipped with the electric switch valve, and electric steam boiler's play steam conduit passes through the electric switch valve and connects the electric switch valve both sides pipeline on the oil pipe respectively, and the platform is equipped with the rail all around, and the platform four corners is equipped with anticollision dish.
The sand pumping pump is characterized in that the two sides of the sand pumping pump are provided with a stirrer and a lifting frame which are fixedly connected, a stirring paddle of the stirrer is lower than a bottom inlet of the sand pumping pump, a lower support is welded at the bottom of the lifting frame, the lower support is of a frame structure formed by welding profile steel, the bottom surface of a frame of the lower support is located at the lower part of the stirrer, and the rotation direction of the sand pumping pump is opposite to that of the two stirrers.
When one winch is started, the brake drums of the other three winches are electrified to release braking.
The height of an overflow pipe of the cyclone separator is lower than the sand outlet of the screw conveyer.
The operation method of the floating oil collecting and sand removing device for the oil field waste liquid comprises the following steps:
s1, connecting the floating pontoon and the floating manifold on the ground, connecting a main cable on a travelling crane cable drum into a power supply cabinet and fixing, filling softened water into an electric steam boiler, fixing a retraction mechanism on the upper edge of a surrounding coaming of a waste liquid pool, screwing a trapezoidal bolt for fixing, and connecting a steel wire rope of each winch to a hanging ring of the floating pontoon;
s2, hoisting the floating pontoon and the floating manifold to the liquid level close to the edge of the waste liquid pool by using a special hoisting tool, tightening steel wire ropes of the winches to fix the floating pontoon, and connecting the floating manifold with the inlet of the oil tank truck;
s3, opening an electric switch valve on the oil outlet pipe, starting an oil pump, pumping crude oil into the oil tank truck, injecting water into the waste liquid pool when the liquid level drops to a part, separating the crude oil from a sediment layer, and continuing oil pumping operation;
s4, when the water content of the crude oil pumped out by the oil outlet pipe rises, ending the oil pumping operation, connecting the outer side of the floating manifold to a water inlet pipe of a sand-water separation system, starting a speed reduction motor to lower the lifting frame to the position of a sediment layer, starting a stirrer, then starting a sand pumping pump, pumping the sediment in the waste liquid pool into a cyclone separator, starting a screw conveyor, discharging the sediment through the screw conveyor, flowing the sewage into a water tank through an overflow pipe, discharging the sewage back into the waste liquid pool by a backflow water pump, and stopping the sand pumping operation at the position when a lower support falls onto the anti-seepage cloth at the bottom and a floating pontoon draft line leaks out of the liquid level;
s5, lifting the lifting frame, and starting a winch to pull the pontoon to the next position for sand pumping operation;
s6, when the temperature is low, the flow of the crude oil is reduced, the electric steam boiler is started, steam enters the outlet of the oil pumping pump for steam oil stewing operation, and then oil pumping operation is carried out;
s7, after the whole oil pumping and sand pumping operation is finished, the electric switch valve is switched on and off, and the floating vessel and the floating manifold are lifted out after crude oil in the oil well pump, the pipeline and the floating manifold is cleaned by steam.
The invention has the following beneficial effects: the whole waste liquid pool is covered by the moving range of the floating pontoon through the pulling of a winch fixed around the waste liquid pool, the floating pontoon is fixed by using steel wire ropes in four directions, the floating pontoon is prevented from rotating along with the rotation of an oil well pump, a sand pump and a stirrer when rotating, a driving device, a steering device and an anchoring device on the floating pontoon are replaced, the floating pontoon moves without the difference of front, back, left and right directions, the moving equipment on the floating pontoon is reduced, the structure is simple, the whole weight of the floating pontoon is reduced, a floating platform is arranged to float on the crude oil liquid surface for oil pumping operation, oil can be pumped along with the descending of the crude oil liquid surface, the stirrer is arranged to stir and mix silt and sewage, the sand pump pumps out silt and sewage mixed fluid, the sand and water are discharged after sand-water separation, one set of devices can simultaneously recover and clean crude oil and silt in the waste liquid pool, the crude oil recovery rate is high, and the silt in the whole waste liquid pool can be cleaned, the use efficiency of the waste liquid pool is improved.
Description of the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of the recovery system of the present invention;
FIG. 3 is a top view of FIG. 2;
FIG. 4 is a side view of FIG. 2;
FIG. 5 is a schematic structural view of a sand-water separation system according to the present invention;
FIG. 6 is a schematic view of the mounting position of the pick and place mechanism of the present invention;
FIG. 7 is a schematic structural diagram of a retracting mechanism of the present invention;
FIG. 8 is a schematic diagram of the floating manifold construction of the present invention;
FIG. 9 is a top view of FIG. 8;
FIG. 10 is a schematic view showing the rotation direction of the sand pump and the stirrer in the present invention.
In the figure, 1-a recovery system, 2-a sand-water separation system, 3-a main cable, 4-a floating manifold, 5-a floating boat, 6-a sand pump, 7-a stirrer, 8-a guide rail, 9-a cross beam, 10-a support, 11-a speed reducing motor, 12-a lifting ring, 13-an oil well pump, 14-a collision disc, 15-an oil outlet pipe, 16-a sand outlet pipe, 17-an electric steam boiler, 18-a control cabinet, 19-an electric switch valve, 20-a one-way valve, 21-a sealed rotary joint, 22-a fixed pipe, 23-a telescopic pipe, 24-a diagonal draw section steel, 25-a spiral conveyor, 26-a cyclone separator, 27-a water tank, 28-a liquid level meter, 29-a backflow water pump, 30-a water inlet pipe and 31-an overflow pipe, 32-a sand outlet, 33-a winch, 34-a steel wire rope, 35-a clamping seat, 36-a rubber plate, 37-a disc, 38-a trapezoidal bolt, 39-a pulley block, 40-a buoy, 41-a waste liquid pool, 42-impermeable cloth, 43-a fence, 44-a lower support, 45-a travelling crane cable reel, 46-a retraction mechanism, 47-a buoyancy bin, 48-a screw, 49-a lead screw and 50-a lifting frame.
The specific implementation mode is as follows:
the invention will be further described with reference to the accompanying drawings in which:
as shown in fig. 1 and fig. 2-10, the floating oil collecting and sand cleaning device for oilfield waste liquid comprises a recovery system 1 and a sand-water separation system 2, wherein the recovery system 1 is positioned in a waste liquid pool 41 and connected with the sand-water separation system 2 positioned outside the waste liquid pool 41 through a floating manifold 4, the recovery system 1 comprises a floating pontoon 5, and the floating pontoon 5 is horizontally connected and fixed with four collecting and releasing mechanisms 46 around the waste liquid pool 41 through steel wire ropes 34 in four directions;
the floating pontoon 5 is a platform formed by welding and combining four square buoyancy chambers 47 and a steel structure, the buoyancy chambers 47 are positioned at four corners of the platform to enable the platform to be more stable, the buoyancy chambers 47 are hollow thin-walled structures made of stainless steel, a support 10 is arranged at the center of the platform, a speed reducing motor 11 is arranged at the upper part of the support 10, a guide rail 8 arranged at the lower part of the support 10 is connected with a lifting frame 50, a screw 48 is fixedly connected on a cross beam 9 at the upper part of the lifting frame 50, the screw 48 is in threaded connection with a screw 49, the screw 49 is connected with the speed reducing motor 11 through a coupler, and a sand pump 6 is fixedly connected at the lower part of the lifting frame 50; an oil well pump 13 is arranged between the two buoyancy bins 47 at one side of the platform;
sand-water separation system 2 includes screw conveyer 25, screw conveyer 25 is the installation of rising angle, screw conveyer 25's import upper portion is installed with cyclone 26, cyclone 26's waist is equipped with the inlet tube 30 that the tangential got into, cyclone 26's overflow pipe 31 is connected on water tank 27 upper portion, install return water pump 29 and level gauge 28 in the water tank 27, return water pump 29 outlet pipe stretches into waste liquid pond 41, the sewage silt that pump 6 was taken out of sand pump gets into cyclone 26, sewage flows to water tank 27 from top overflow pipe 31 under the whirl effect in, silt passes through screw conveyer 25 discharge loading, return water pump 29 is carried sewage back to waste liquid pond 41 in and participates in silt stirring again.
The retraction mechanism 46 comprises a winch 33, the lower part of the winch 33 is fixedly connected with a clamping seat 35, the clamping seat 35 is of an inverted U-shaped steel plate structure, a rubber plate 36 is bonded on the inner side of a left steel plate of the clamping seat 35, a threaded hole is formed in a right steel plate of the clamping seat 35 and is in threaded connection with a trapezoidal bolt 38, the inner side of the trapezoidal bolt 38 is connected with a disc 37 through a bearing and a hole check ring, the inner side of the disc 37 is bonded with the rubber plate 36, the rubber plate 36 is bonded on the bottom plane of a transverse steel plate of the clamping seat 35, a set of pulley block 39 is fixedly connected to the outer side of the left steel plate of the clamping seat 35, the pulley block 39 consists of two adjacent pulleys and a framework, the clamping seat 35 is mounted at the upper end of a coaming of a waste liquid tank 41 and clamped on two sides of impermeable cloth 42 surrounded on the waste liquid tank 41;
oblique-pulling section steel 24 is welded on two sides of two guide rails 8 of a support 10 of the floating vessel 5, a hanging ring 12 is welded on the waist of each oblique-pulling section steel 24, and a steel wire rope 34 of each winch 33 penetrates through the middle of two pulleys and then is connected to the hanging ring 12 of the floating vessel 5.
The floating manifold 4 is composed of a plurality of sealed rotary joints 21 and flange-connected steel pipes, wherein the sealed rotary joints 21 in the vertical direction are connected with the steel pipes up and down through elbows to form a pipeline group which can be opened and closed in the horizontal direction, the steel pipes at the lower parts of the sealed rotary joints 21 are all fixedly connected with buoys 40, the floating manifold 4 and the floating ships 5 float on the liquid level together, when the liquid level changes, the floating manifold 4 synchronously goes up and down along with the floating ships 5, when the floating ships 5 move in the waste liquid tank 41 on the plane, the pipeline group is pulled to be opened and closed, fluid can be conveyed along with the floating ships 5 at any position, and the steel pipes at the upper parts of the sealed rotary joints 21 are all fixedly connected with lifting rings 12;
the sealed rotary joint 21 on one side of the pipeline group is connected with a steel pipe which is vertically upward in a flange mode, and the upper portion of the steel pipe is connected with two sealed rotary joints 21 in the horizontal direction and the steel pipe to form a rotary arm which can rotate up and down so as to adapt to height changes between a pipeline fixed on the upper portion of the waste liquid pool 41 and the floating manifold 4 floating along with the liquid level.
The outlet of the sand pump 6 is connected with a sand outlet pipe 16, a one-way valve 20 is arranged on a pipeline of the vertical part of the sand outlet pipe 16, the oil outlet pipe 15 of the oil well pump 13 is connected with the rear side of the one-way valve 20 of the sand outlet pipe 16 after being provided with the one-way valve 20, the sand outlet pipe 16 connected with the upper side of the oil outlet pipe 15 is connected with a sealing rotary joint 21 in series, the rear side of the sealing rotary joint 21 is converted into a transverse pipe flange through an elbow and is connected with a floating manifold 4, the floating manifold 4 extends out of a waste liquid pool 41 and is connected with a water inlet pipe 30 of a sand-water separation system 2, two groups of pipelines are respectively provided with the one-way valve 20, and can share one output pipe for fluid transportation;
the pipeline at the lower part of the one-way valve 20 of the sand pump 6 is connected with a telescopic pipe 23 through a fixed pipe 22, the telescopic pipe 23 is inserted into the fixed pipe 22 at the lower part, the telescopic pipe 23 is in clearance fit connection with the fixed pipe 22 through a sealing ring, and the telescopic pipe 23 can move up and down to adapt to the lifting sand pump 6.
The platform is provided with a control cabinet 19, and an entrance main cable 3 of the control cabinet 19 is connected with a fixed power supply outside the waste liquid tank 41 after being connected with a travelling crane cable reel 45.
The electric steam boiler 17 is installed on the platform, the electric switch valve 19 is arranged at the front end of the check valve 20 of the oil outlet pipe 15, a steam outlet pipeline of the electric steam boiler 17 is respectively connected with pipelines at two sides of the electric switch valve 19 on the oil outlet pipe 15 through the electric switch valve 19, steam can enter a liquid inlet at the bottom of the oil well pump 13 from the pipelines to flow out through opening and closing the electric switch valves, steam stewing oil operation is carried out on crude oil, the flowability of the crude oil is improved, the crude oil can also enter the floating manifold 4 and is used for improving the temperature of the floating manifold 4 and cleaning the crude oil in the floating manifold 4, rails 43 are arranged around the platform, and anti-collision discs 14 are arranged at four corners of the platform to prevent the floating ship 5 from colliding with the anti-seepage cloth 42 on the wall of the waste liquid pool 41 to cause damage.
The stirrers 7 are arranged on two sides of the sand pump 6 and fixedly connected with the lifting frame 50, stirring paddles of the stirrers 7 are lower than a bottom inlet of the sand pump 6, the lower support 44 is welded at the bottom of the lifting frame 50, the lower support 44 is of a frame structure formed by welding profile steel, the bottom surface of a frame of the lower support 44 is located at the lower part of the stirrer 7, the lower support 44 can prevent blades of the stirrers 7 from scraping and touching the anti-seepage 42 at the bottom of the waste liquid pool 41, the floating vessel 5 is supported when the lower support 44 falls to the bottom of the waste liquid pool 41 and serves as a mark of the completion of sand pumping at the position, the rotating direction of the sand pump 6 is opposite to the rotating direction of the two stirrers 7 so as to offset respective torque of one part, and the rotating trend of the floating vessel 5 is reduced.
When one winch 33 is started, the brake drums of the other three winches 33 are electrified to release the brake, and the steel wire ropes 34 in three directions are in a free state, so that the floating vessel 5 is pulled in one direction only.
The overflow pipe 31 of the cyclone 26 is lower than the sand outlet 32 of the screw conveyor 25.
All the pump equipment control sections on the vessel 5 are equipped with reception circuits and are equipped with remote controllers by which the equipment on the vessel 5 is operated.
The operation method of the floating oil collecting and sand removing device for the oil field waste liquid comprises the following steps:
s1, connecting the floating pontoon 5 and the floating manifold 4 together on the ground, connecting the main cable 3 on the travelling crane cable reel 45 into a power supply cabinet and fixing, filling softened water into the electric steam boiler 17, fixing the retraction mechanism 46 on the upper edge of the surrounding enclosing plate of the waste liquid pool 41, screwing the trapezoidal bolt 38 for fixing, and connecting the steel wire rope 34 of each winch 33 on the hanging ring 12 of the floating pontoon 5;
s2, hoisting the pontoon 5 and the floating manifold 4 to the liquid level close to the edge of the waste liquid pool 41 by using a special hoisting tool, tightening the steel wire ropes 34 of the winches 33 to fix the pontoon 5, and connecting the floating manifold 4 with the inlet of the tank wagon;
s3, opening the electric switch valve 19 on the oil outlet pipe 15, starting the oil pump 13, pumping the crude oil into the tank wagon, injecting water into the waste liquid pool 41 when the liquid level drops to a part, separating the crude oil from the sediment layer, and continuing oil pumping operation;
s4, when the water content of the crude oil pumped out by the oil outlet pipe 15 rises, the oil pumping operation is finished, the outer side of the floating manifold 4 is connected to the water inlet pipe 30 of the sand-water separation system 2, the speed reducing motor 11 is started to lower the lifting frame 50 to the position of a sediment layer, the stirrer 7 is started, then the sand pump 6 is started to pump the sediment in the waste liquid pool 41 into the cyclone separator 26, the spiral conveyor 25 is started, the sediment is discharged through the spiral conveyor 25, the sewage flows into the water tank 27 through the overflow pipe 31, the sewage is discharged back into the waste liquid pool 41 through the reflux water pump 29, the lower support 44 falls onto the anti-seepage cloth 42 at the bottom, the waterline of the floating pontoon 5 leaks out of the liquid level, and the sand pumping operation at the position is stopped;
s5, lifting the lifting frame 50, and starting a winch 33 to pull the pontoon 5 to the next position for sand pumping operation;
s6, when the temperature is low, the flow of the crude oil is reduced, the electric steam boiler 17 is started, steam enters the outlet of the oil well pump 13 for steam oil stewing operation, and then oil pumping operation is carried out;
s7, after the whole oil pumping and sand pumping operation is finished, the crude oil in the oil well pump 13, the pipeline and the floating manifold 4 is cleaned by steam through opening and closing the electric switch valve 19, and then the floating vessel 5 and the floating manifold 4 are lifted out.
The whole waste liquid pool is covered by the moving range of the floating pontoon through the pulling of a winch fixed around the waste liquid pool, the floating pontoon is fixed by using steel wire ropes in four directions, the floating pontoon is prevented from rotating along with the rotation of an oil well pump, a sand pump and a stirrer when rotating, a driving device, a steering device and an anchoring device on the floating pontoon are replaced, the floating pontoon moves without the difference of front, back, left and right directions, the moving equipment on the floating pontoon is reduced, the structure is simple, the whole weight of the floating pontoon is reduced, a floating platform is arranged to float on the crude oil liquid surface for oil pumping operation, oil can be pumped along with the descending of the crude oil liquid surface, the stirrer is arranged to stir and mix silt and sewage, the sand pump pumps out silt and sewage mixed fluid, the sand and water are discharged after sand-water separation, one set of devices can simultaneously recover and clean crude oil and silt in the waste liquid pool, the crude oil recovery rate is high, and the silt in the whole waste liquid pool can be cleaned, the use efficiency of the waste liquid pool is improved.
Claims (9)
1. The utility model provides an oil field waste liquid floats oil recovery sand removal device, includes recovery system (1) and sand water separation system (2), its characterized in that: the recovery system (1) is positioned in the waste liquid pool (41) and is connected with the sand-water separation system (2) positioned outside the waste liquid pool (41) through a floating manifold (4), the recovery system (1) comprises a floating pontoon (5), and the floating pontoon (5) is horizontally connected and fixed with four retraction mechanisms (46) around the waste liquid pool (41) through steel wire ropes (34) in four directions;
the floating pontoon (5) is a platform formed by welding and combining four square buoyancy bins (47) and a steel structure, the buoyancy bins (47) are positioned at four corners of the platform, the buoyancy bins (47) are hollow thin-wall structures made of stainless steel, a support (10) is installed at the center of the platform, a speed reducing motor (11) is installed at the upper part of the support (10), a guide rail (8) is arranged at the lower part of the support (10) and connected with a lifting frame (50), a screw (48) is fixedly connected on a cross beam (9) at the upper part of the lifting frame (50), the screw (48) is in threaded connection with a lead screw (49), the lead screw (49) is connected with the speed reducing motor (11) through a coupler, and the lower part of the lifting frame (50) is fixedly connected with a sand pump (6); an oil well pump (13) is arranged between the two buoyancy bins (47) at one side of the platform;
sand-water separation system (2) includes screw conveyer (25), bolt conveyer (25) are the lift angle installation, cyclone (26) are installed on the import upper portion of screw conveyer (25), the waist of cyclone (26) is equipped with inlet tube (30) that the tangential got into, overflow pipe (31) of cyclone (26) are connected on water tank (27) upper portion, install backward flow water pump (29) and level gauge (28) in water tank (27), backward flow water pump (29) outlet pipe stretches into in waste liquid pond (41).
2. The floating oil recovery and sand removal device for oilfield waste liquid according to claim 1, characterized in that: the retraction mechanism (46) comprises a winch (33), the lower part of the winch (33) is fixedly connected with a clamping seat (35), the clamping seat (35) is of an inverted U-shaped steel plate structure, a rubber plate (36) is bonded on the inner side of a left steel plate of the clamping seat (35), a threaded hole is formed in the right steel plate of the clamping seat (35) and is in threaded connection with a trapezoidal bolt (38), the inner side of the trapezoidal bolt (38) is connected with a disc (37) through a bearing and a hole check ring, the inner side of the disc (37) is bonded with the rubber plate (36), the bottom plane of a transverse steel plate of the clamping seat (35) is bonded with the rubber plate (36), a set of pulley block (39) is fixedly connected to the outer side of the left steel plate of the clamping seat (35), the pulley block (39) consists of two adjacent pulleys and a framework, the clamping seat (35) is installed at the upper end of a coaming of a waste liquid pool (41), and is clamped on two sides of impermeable cloth (42) surrounded on the waste liquid pool (41);
oblique-pulling section steel (24) is welded on two sides of two guide rails (8) of a support (10) of the floating vessel (5), a hanging ring (12) is welded on the waist of each oblique-pulling section steel (24), and a steel wire rope (34) of each winch (33) penetrates through the middle of two pulleys and then is connected to the hanging ring (12) of the floating vessel (5).
3. The floating oil recovery and sand removal device for oilfield waste liquid according to claim 1, characterized in that: the floating manifold (4) is composed of a plurality of sealed rotary joints (21) which are connected with steel pipes through flanges, wherein the sealed rotary joints (21) in the vertical direction are connected with the steel pipes through elbows to form a pipeline group which can be opened and closed in the horizontal direction, floating cylinders (40) are fixedly connected to the steel pipes at the lower parts of the sealed rotary joints (21), and lifting rings (12) are fixedly connected to the steel pipes at the upper parts of the sealed rotary joints (21);
the sealing rotary joint (21) at one side of the pipeline group is connected with a steel pipe which is vertically upward in a flange mode, and the upper portion of the steel pipe is connected with two sealing rotary joints (21) in the horizontal direction and the steel pipe to form a rotary arm capable of rotating up and down.
4. The floating oil recovery and sand removal device for oilfield waste liquid according to claim 1, characterized in that: an outlet of the sand pump (6) is connected with a sand outlet pipe (16), a one-way valve (20) is installed on a vertical part pipeline of the sand outlet pipe (16), an oil outlet pipe (15) of the oil well pump (13) is provided with the one-way valve (20) and then is connected to the rear side of the one-way valve (20) of the sand outlet pipe (16), the sand outlet pipe (16) connected to the upper side of the oil outlet pipe (15) is connected with a sealing rotary joint (21) in series, the rear side of the sealing rotary joint (21) is converted into a transverse pipe flange through an elbow to be connected with a floating pipe manifold (4), and the floating pipe manifold (4) extends out of a waste liquid pool (41) and is connected with a water inlet pipe (30) of the sand-water separation system (2);
the pipeline at the lower part of the one-way valve (20) of the sand pump (6) is connected with the telescopic pipe (23) through the fixed pipe (22), the telescopic pipe (23) is inserted into the fixed pipe (22) at the lower part, and the telescopic pipe (23) is in clearance fit connection with the fixed pipe (22) through the sealing ring.
5. The floating oil recovery and sand removal device for oilfield waste liquid according to claim 1, characterized in that: install switch board (19) on the platform, the house lead-in main cable (3) of switch board (19) are connected behind driving cable reel (45) and are connected with the outside fixed power supply in waste liquid pond (41), install electric steam boiler (17) on the platform, check valve (20) front end that goes out oil pipe (15) is equipped with electric switch valve (19), the play steam conduit of electric steam boiler (17) passes through electric switch valve (19) and connects electric switch valve (19) both sides pipeline on oil pipe (15) respectively, the platform is equipped with rail (43) all around, the platform four corners is equipped with anticollision dish (14).
6. The floating oil recovery and sand removal device for oilfield waste liquid according to claim 1, characterized in that: the sand pumping pump (6) both sides are equipped with agitator (7) and crane (50) fixed connection, and the stirring rake of agitator (7) is less than the bottom import of sand pumping pump (6), and crane (50) bottom welding has undersetting (44), and undersetting (44) are by the frame structure that shaped steel welded becomes, and the frame bottom surface of undersetting (44) is located the lower part of agitator (7), and the direction of rotation of sand pumping pump (6) is opposite with the direction of rotation of two agitators (7).
7. The floating oil recovery and sand removal device for oilfield waste liquid according to claim 2, characterized in that: when one winch (33) is started, the brake drums of the other three winches (33) are electrified to release braking.
8. The floating oil recovery and sand removal device for oilfield waste liquid according to claim 1, characterized in that: the height of an overflow pipe (31) of the cyclone separator (26) is lower than a sand outlet (32) of the screw conveyor (25).
9. The operation method of the floating oil recovery and sand removal device for oilfield waste liquid according to any one of claims 1 to 10, characterized by comprising the following steps:
s1, connecting a floating pontoon (5) and a floating manifold (4) together on the ground, connecting a main cable (3) on a travelling crane cable drum (45) into a power supply cabinet and fixing, filling softened water into an electric steam boiler (17), fixing a retraction mechanism (46) on the upper edge of a surrounding coaming of a waste liquid pool (41), screwing a trapezoidal bolt (38) for fixing, and connecting a steel wire rope (34) of each winch (33) to a lifting ring (12) of the floating pontoon (5);
s2, hoisting the floating pontoon (5) and the floating manifold (4) to the liquid level of the waste liquid pool (41) close to the edge by using a special hoisting tool, tightening the steel wire ropes (34) of the hoisting machines (33) to fix the floating pontoon (5), and connecting the floating manifold (4) with the inlet of the tank wagon;
s3, opening an electric switch valve (19) on the oil outlet pipe (15), starting an oil pump (13), pumping crude oil into the oil tank truck, injecting water into a waste liquid pool (41) when the liquid level drops to a part, separating the crude oil from a sediment layer, and continuing oil pumping operation;
s4, when the water content of crude oil pumped out by an oil outlet pipe (15) rises, the oil pumping operation is finished, the outer side of a floating manifold (4) is connected to a water inlet pipe (30) of a sand-water separation system (2), a speed reduction motor (11) is started to lower a lifting frame (50) to a sediment layer position, a stirrer (7) is started, then a sand pumping pump (6) is started to pump sediment in a waste liquid pool (41) into a cyclone separator (26), a spiral conveyor (25) is started, the sediment is discharged through the spiral conveyor (25), sewage flows into a water tank (27) through an overflow pipe (31), a return water pump (29) drains the sewage back into the waste liquid pool (41), when a lower support (44) falls onto an anti-seepage cloth (42) at the bottom, the draft line of a floating pontoon (5) leaks out of the liquid level, and the sand pumping operation at the position is stopped;
s5, lifting the lifting frame (50), and starting a winch (33) to pull the pontoon (5) to the next position for sand pumping operation;
s6, when the temperature is low, the flow of crude oil is reduced, the electric steam boiler (17) is started, steam enters the outlet of the oil pump (13) for steam stewing operation, and then oil pumping operation is carried out;
s7, after the whole oil pumping and sand pumping operation is finished, the crude oil in the oil well pump (13), the pipeline and the floating manifold (4) is cleaned by opening and closing the electric switch valve (19) and by using steam, and then the floating vessel (5) and the floating manifold (4) are lifted out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111110295.4A CN113738310A (en) | 2021-10-14 | 2021-10-14 | Floating oil-collecting and sand-removing device for oil field waste liquid and operation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111110295.4A CN113738310A (en) | 2021-10-14 | 2021-10-14 | Floating oil-collecting and sand-removing device for oil field waste liquid and operation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113738310A true CN113738310A (en) | 2021-12-03 |
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ID=78740347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111110295.4A Withdrawn CN113738310A (en) | 2021-10-14 | 2021-10-14 | Floating oil-collecting and sand-removing device for oil field waste liquid and operation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113738310A (en) |
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2021
- 2021-10-14 CN CN202111110295.4A patent/CN113738310A/en not_active Withdrawn
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Application publication date: 20211203 |
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