CN104806207B - A kind of deep-sea viscous crude harvester - Google Patents
A kind of deep-sea viscous crude harvester Download PDFInfo
- Publication number
- CN104806207B CN104806207B CN201510113964.1A CN201510113964A CN104806207B CN 104806207 B CN104806207 B CN 104806207B CN 201510113964 A CN201510113964 A CN 201510113964A CN 104806207 B CN104806207 B CN 104806207B
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- oil
- sucker rod
- main
- extension bar
- casing
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- 239000003921 oil Substances 0.000 claims abstract description 129
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 63
- 239000003129 oil well Substances 0.000 claims abstract description 45
- 239000004576 sand Substances 0.000 claims abstract description 40
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 31
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-ZSJDYOACSA-N Heavy water Chemical compound [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 claims description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 29
- 238000010438 heat treatment Methods 0.000 claims description 24
- 238000009413 insulation Methods 0.000 claims description 18
- 238000003860 storage Methods 0.000 claims description 18
- 239000004020 conductor Substances 0.000 claims description 14
- 238000009422 external insulation Methods 0.000 claims description 12
- 238000005086 pumping Methods 0.000 claims description 12
- 238000013019 agitation Methods 0.000 claims description 11
- 239000008400 supply water Substances 0.000 claims description 8
- 244000273618 Sphenoclea zeylanica Species 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims description 2
- 239000010779 crude oil Substances 0.000 abstract description 48
- 238000000034 method Methods 0.000 abstract description 10
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 2
- 229960004424 carbon dioxide Drugs 0.000 description 28
- 230000000694 effects Effects 0.000 description 18
- 239000013535 sea water Substances 0.000 description 16
- 238000001816 cooling Methods 0.000 description 5
- 230000001771 impaired effect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 241000790917 Dioxys <bee> Species 0.000 description 1
- GCNLQHANGFOQKY-UHFFFAOYSA-N [C+4].[O-2].[O-2].[Ti+4] Chemical compound [C+4].[O-2].[O-2].[Ti+4] GCNLQHANGFOQKY-UHFFFAOYSA-N 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000002207 thermal evaporation Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/003—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings with electrically conducting or insulating means
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
-
- 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
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
-
- 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/164—Injecting CO2 or carbonated water
-
- 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a kind of deep-sea viscous crude harvester, it is desirable to provide it is a kind of in oil recovery process can the viscous crude higher to viscosity carry out dropping glutinous processing, so as to improve viscous crude mobility, it is ensured that the deep-sea viscous crude harvester that heavy crude reservoir smoothly gathers.It includes main oil pipe, hollow sucker rod, oil well cylinder, oil well cylinder is provided with marine riser, main oil pipe lower end is stretched into oil well cylinder, screw pump is provided with main oil pipe, the main forwardtransfer signal worm of screw pump is connected with sucker rod, and bottom is provided with sand control screen in oil well cylinder, there is screen casing oil-out at the top of sand control screen, screen casing oil-out is communicated with the oil inlet of screw pump, and cable, cable one end connection power supply source are provided with sucker rod.The beneficial effects of the invention are as follows：Viscous crude can rationally be heated, make the reduction of its viscosity, beneficial to collection；Carbon dioxide and vapor can be passed through, to that will rise, and the crude oil in uphill process carries out drop and sticked.
Description
Technical field
The invention belongs to oil reservoir production technique field, more particularly to a kind of deep-sea viscous crude harvester.
Background technology
Heavy crude reservoir is widely distributed in the world, and according to statistics, viscous crude (including pitch) reservoir geology reserves at least exist
More than 4 times of explored conventional crude reserves, optimistic estimate even can be more than 6 times.It is deep with exploration of the people to deep water
The concern that water viscous crude is increasingly come, it is exploited development activities and also deployed all over the world.
But,, can be in seabed due to the factor such as its depth is deeper typically at 500 to 2500 meters residing for the deepwater depth of water
A low-temperature region is formed, in addition the temperature sensitivity of viscous crude, and itself viscosity is higher, therefore can be flowed in low-temperature region
Difficulty, or even gradually lose flowability, oil well is unable to maintain that normal production.
The content of the invention
, can be with oil recovery process it is an object of the invention to overcome the defect of prior art, and provide a kind of rational in infrastructure
The viscous crude higher to viscosity carries out dropping glutinous processing, so as to improve viscous crude mobility, it is ensured that the depth that heavy crude reservoir smoothly gathers
Extra large viscous crude harvester.
To achieve these goals, the present invention uses following technical scheme：
A kind of deep-sea viscous crude harvester, including the hollow sucker rod of main oil pipe, upper end open, stretch into seabed mud line it
Under oil well cylinder, described oil well cylinder be provided with one have inner chamber marine riser, described riser top stretch out sea, oil well
It is tightly connected between the barrel of cylinder and the tube wall of marine riser, main oil pipe passes through the inner chamber of marine riser, and oil well is stretched into main oil pipe lower end
In cylinder, screw pump, the upper end of the main forwardtransfer signal worm of described screw pump and the lower end phase of sucker rod are provided with described main oil pipe
Even, described screw pump is at the lower end of main oil pipe, has perforation shell hole on described oil well cylinder, described perforation shell hole is stretched
Enter oil reservoir, bottom is provided with sand control screen in described oil well cylinder, has screen casing oil-out, institute at the top of described sand control screen
The screen casing oil-out stated is communicated with the oil inlet of screw pump, and screen casing packer, described sand screen are provided with described oil well cylinder
Pipe is tightly connected, described screen casing packer through screen casing packer between described sand control screen outer wall and screen casing packer
It is tightly connected between oily shaft in wall, cable, described cable one end connection power supply source, cable is provided with described sucker rod
The bottom of other end connecting with pumping rod, the top of described sucker rod take back power supply source by electric wire, and described cable includes interior
Insulated between the main forwardtransfer signal worm of wire, external insulation jacket, described sucker rod and screw pump, in addition to a well head oil well pump,
Described well head oil well pump is provided with an oil pick-up tube, and described oil pick-up tube one end is stretched into main oil pipe, and the oil pick-up tube stretches into master
The pipe range of oil pipe inside points is more than 20 meters, and described sucker rod is provided with elastic righting section, and described elastic righting section includes using
Ring is connect in the righting section being connected with sucker rod lateral wall, righting section is connected to and connects elastic housing washer on ring, described elastic housing washer
External diameter be main pipe aperture 50% to 90%.
Preferably, be provided with tubing packer in described oil well cylinder, described main oil pipe outer wall and tubing packer it
Between be tightly connected, be tightly connected between described tubing packer and oily shaft in wall, tubing packer, screen casing packer, oil
Heavy water oil storage cavity is formed between the inwall of pit shaft, the bore of described heavy water oil storage cavity is more than the bore of sand control screen.
Preferably, the main forwardtransfer signal worm lower end of described screw pump connects extension bar, in described heavy water oil storage cavity
Lagging is directly inhaled provided with anti-, described anti-straight lagging of inhaling is connected on lower extension bar, described anti-straight suction lagging outer ledge
The passage that oils is formed between the cavity wall of heavy water oil storage cavity, described lower extension bar is provided with more agitation cross bars, described agitation
Cross bar one end is fixed on lower extension bar, and described agitation cross bar is in below anti-straight suction lagging.
Preferably, described sucker rod lower ending opening, the main forwardtransfer signal worm of described screw pump is upper and lower end opening
Cored screw, the upper end open of described sucker rod connect a carbon dioxide air feed pump, and described carbon dioxide air feed pump connects
Carbon dioxide air source is connect, is connected between described sucker rod and main forwardtransfer signal worm, described lower extension bar is the sky of upper and lower end opening
Core bar, described lower extension bar are connected and connected with main forwardtransfer signal worm, and described lower extension bar lower end is stretched into sand control screen, described
Lower extension bar is provided with multiple air intakes being in sand control screen, and described air intake is provided with into gas check valve.
Preferably, all air intakes are vertically arranged enters air-casing in a straight line, the interior interval that is provided with of described sand control screen, institute
The lower extension bar stated and interval enter rotation connection and lower extension bar outer wall and interval between air-casing and sealed between entering air-casing inwall, described
Interval enters air-casing provided with the vertical blowhole of a row, the connection corresponding with one of air intake of each blowhole.
Preferably, described lower extension bar is provided with multiple mixed gas ports, described mixed gas port is provided with mixed gas check valve, institute
The lower extension bar stated is externally provided with the mixed air-casing of interval, between described lower extension bar and the mixed air-casing of interval rotation connection and lower extension bar outer wall with
Sealed between the mixed air-casing inwall of interval, described interval, which is mixed air-casing and is in, prevents directly inhaling between lagging and screw pump, between described
Mixed air-casing of having a rest is provided with some gas mixed holes, and each gas mixed hole can mix the corresponding connection of gas port with one of them.
Preferably, being provided with sponge cylinder layer between described sucker rod and cable, described sponge cylinder layer is connected to oil pumping
It is provided with threading hole on bar inwall, in described sponge cylinder layer, described cable passes through threading hole, and described sponge cylinder layer is by cable
Separated with sucker rod.
Preferably, the upper end open of described sucker rod connects with the water side of a supply-water pump, described supply-water pump
Water inlet end connects water source.
Preferably, described main oil pipe is provided with tubing centrilizer, described tubing centrilizer tip height and oil well
Cylinder tip height is consistent, and heating chamber is provided with described tubing centrilizer, heater is provided with described heating chamber, heater
Heating head is stretched into main oil pipe, and described water proof inside pipe wall is provided with heat-insulation layer.
Preferably, described external insulation jacket includes multiple insulation sleeve sections, in the inwall of described insulation sleeve section compresses
Wire, elastic connection is provided between adjacent insulation sleeve section and is roused, is formed in one between described elastic connection drum and insulation sleeve section
Structure, there is gap between described elastic connection drum inwall and inside conductor.
The beneficial effects of the invention are as follows：Viscous crude can rationally be heated, make the reduction of its viscosity, beneficial to collection；It can lead to
Enter carbon dioxide and vapor, to that will rise, and the crude oil in uphill process carries out drop and sticked；It is same in venting process
When provide cooling protection function, protect wire, prevent that it is impaired；Structure is cohered with different mixed gas drops, on the whole more section
Ground distribution heat and gas are learned, further lifts crude oil viscosity lowering effect, ensures the efficiency and effect recovered the oil.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation at the heavy water oil storage cavity of the present invention；
Fig. 3 is the structural representation at air intake of the present invention；
Fig. 4 is the structural representation of the invention intermittently entered at air-casing；
Fig. 5 is the structural representation at the mixed air-casing of interval of the invention；
Fig. 6 is the structural representation inside sucker rod of the present invention；
Fig. 7 is the structural representation of the cable of the present invention；
Fig. 8 is the structural representation at the elastic righting section of the present invention.
In figure：Main oil pipe 1, sucker rod 2, seabed mud line 3, oil well cylinder 4, marine riser 5, sea 6, screw pump 7, perforation shell hole
8th, oil reservoir 9, sand control screen 10, screen casing packer 11, cable 12, external insulation jacket 13, tubing packer 14, heavy water store oil
Chamber 15, lower extension bar 16, it is anti-straight inhale lagging 17, the passage 18 that oils, agitation cross bar 19, carbon dioxide air feed pump 20, air intake 21,
Interval enters air-casing 22, blowhole 23, mixed gas port 24, the mixed air-casing 25 of interval, gas mixed hole 26, sponge cylinder layer 27, supply-water pump 28, oil pipe
Centralizer 29, gap 30, inside conductor 31, insulation sleeve section 32, elastic connection drum 33, well head oil well pump 34, oil pick-up tube 35, elasticity are helped
Positive section 36, righting section connect ring 37, elastic housing washer 38.
Embodiment
The present invention will be further described with reference to the accompanying drawings and detailed description.
As shown in Figure 1, Figure 2, in the embodiment shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, a kind of deep-sea viscous crude harvester,
Including main oil pipe 1, the hollow sucker rod 2 of upper end open, the oil well cylinder 4 that stretches under seabed mud line 3, on described oil well cylinder
Provided with a marine riser 5 with inner chamber, described riser top stretches out sea 6, the barrel of oil well cylinder and the tube wall of marine riser
Between be tightly connected, main oil pipe pass through marine riser inner chamber, main oil pipe lower end is stretched into oil well cylinder, is provided with described main oil pipe
Screw pump 7, the upper end of main forwardtransfer signal worm of described screw pump are connected with the lower end of sucker rod, and described screw pump is in main oil
At the lower end of pipe, there is perforation shell hole 8 on described oil well cylinder, described perforation shell hole stretches into oil reservoir 9, described oil well
Bottom is provided with sand control screen 10 in cylinder, has screen casing oil-out, described screen casing oil-out and spiral shell at the top of described sand control screen
The oil inlet of bar pump is communicated, and screen casing packer 11 is provided with described oil well cylinder, and described sand control screen passes through screen casing packer,
It is tightly connected between described sand control screen outer wall and screen casing packer, it is close between described screen casing packer and oily shaft in wall
Envelope connection, described sucker rod is interior to be provided with cable 12, described cable one end connection power supply source, cable other end connecting with pumping rod
Bottom, the top of described sucker rod takes back power supply source by electric wire, and described cable includes inside conductor 31, external insulation jacket
13, insulated between described sucker rod and the main forwardtransfer signal worm of screw pump, in addition to a well head oil well pump 34, described well head are taken out
Oil pump is provided with an oil pick-up tube 35, and described oil pick-up tube one end is stretched into main oil pipe, and the oil pick-up tube stretches into main oil pipe inside points
Pipe range be more than 20 meters, described sucker rod is provided with elastic righting section 36, described elastic righting section include for and oil pumping
The righting section of bar lateral wall connection, which connects ring 37, is connected to righting section connects elastic housing washer 38 on ring, described elastic housing washer it is outer
Footpath is the 50% to 90% of main pipe aperture.
Cable is stretched into hollow sucker rod, and the two connects in the bottom of sucker rod, then mixes power supply source, electric wire, is formed
One heating circuit, electric current are flowed into through cable, are flowed out by hollow sucker rod, and outer insulating bag set is electrically isolated.When there is friendship
Stream electricity by above-mentioned heating circuit, because the conductive heat production of kelvin effect, kindred effect, hysteresis effect and cable in itself etc. because
Element, collective effect heating.The higher viscous crude of viscosity is conveyed by screw pump, main oil pipe, and hollow sucker rod is then
Be within main oil pipe, first for connecting screw pump main forwardtransfer signal worm (no matter single-screw (single screw) pump, multi screwpump, at least all
Can have main forwardtransfer signal worm, to accept the input of power) come complete drive rotation, oil pumping, oil stream lifting action, second thereon
The medium (oil stream) that caused heat is lifted is taken away, and realizes and the overall process of main oil pipe inside viscous crude from bottom to top is added
Heat, sticked so as to reach to heat to drop, improve its mobility and improve the purpose of oil well lifting effect.Well head oil well pump passes through oil pick-up tube
Stretch into main oil pipe to be pumped, so as to which crude oil no longer needs to be expelled directly out from main oil pipe, well head overflow etc. can be avoided
Problem, and eliminate the larger well mouth oil pipe of installation difficulty.Furthermore the power lug of electric heating device, power supply source wiring etc.
All it is that the present invention is accessed near well head, less than 20 meters is stretched into main oil pipe by oil pick-up tube, then can allows various power connection end knots
Crude oil is all avoided contact with outside structure, improves security and service life.
Tubing packer 14 is provided with described oil well cylinder, the company of sealing between described main oil pipe outer wall and tubing packer
Connect, be tightly connected between described tubing packer and oily shaft in wall, tubing packer, screen casing packer, oil well cylinder it is interior
Heavy water oil storage cavity 15 is formed between wall, the bore of described heavy water oil storage cavity is more than the bore of sand control screen.The mistake of oil reservoir exploitation
Cheng Zhong, necessarily has a process for conveying of recovering the oil, this process be typically using kinetic pump (such as screw pump) being pumped and
Lifting to crude oil.And in practice, the medium for being extracted and lifting will not only have crude oil, but can contain a large amount of impurity with
And seawater etc., in some cases, moisture content even can more than ninety percent (oil reservoir viscosity is too high, it is difficult to extract, it is big so as to be extracted into
The relatively runny seawater of amount, or the factors such as oil reservoir moisture content itself is higher cause).Crude oil (viscous crude) together with seawater, from
After sand control screen enters, in the presence of screw pump suction, begin to ramp up, can now be introduced into heavy water oil storage cavity, the water that sinks stores
The bore of oil pocket is larger, thus crude oil, seawater can short stay here, because crude oil herein is the original that has been pumped
Oil, therefore viscosity is low with respect to for the viscous crude in oil reservoir, it is relatively also diluter.Crude oil, seawater meeting in heavy water oil storage cavity
The preliminary layering of beginning, water is downward, oil is upward, and substantial oil can be closer to the oil pumping end of screw pump, so as to effectively improve screw rod
The pumping efficiency of pump, reduce by the ratio of lifting seawater, reduce additional energy, lift oil recovery effect.And the seawater settled downwards,
It with the going successively to of follow-up crude oil, upper lower leaf, can be constantly pressed down against, rest on bottom forever or flow back to oil reservoir storage
Layer region.
The main forwardtransfer signal worm lower end of described screw pump connects extension bar 16, is provided with described heavy water oil storage cavity anti-straight
Lagging 17 is inhaled, described anti-straight lagging of inhaling is connected on lower extension bar, described anti-straight suction lagging outer ledge and heavy water
The passage 18 that oils is formed between the cavity wall of oil storage cavity, described lower extension bar is provided with more agitation cross bars 19, and described agitation is horizontal
Bar one end is fixed on lower extension bar, and described agitation cross bar is in below anti-straight suction lagging.Crude oil is together with seawater from sand control
After the outflow of screen casing upper end, cause to suck a large amount of seawater simultaneously in order to avoid screw pump direct suction crude oil, spy sets an anti-straight suction horizontal
Baffle plate, after having anti-straight suction lagging, crude oil (viscous crude) is required for the path by complications with seawater, via the passage ability that oils
Reach above anti-straight suction lagging, below screw pump oil pumping end, in the process, can preferably carry out point of crude oil and seawater
From, make its layering.Furthermore on lower extension bar have agitation cross bar, therefore, viscous crude with seawater during layering is separated, it is sticky
Crude oil can be stirred, so as to which scattered drop is glutinous, so preferably crude oil can be allowed to rise, compressing seawater sinks so that anti-straight to inhale
Lagging upper liquid Crude Oil ratio is further lifted, so as to preferably improve pumping efficiency.
Described sucker rod lower ending opening, the main forwardtransfer signal worm of described screw pump are the cored screw of upper and lower end opening,
The upper end open of described sucker rod connects a carbon dioxide air feed pump 20, described carbon dioxide air feed pump connection titanium dioxide
Carbon source of the gas, connected between described sucker rod and main forwardtransfer signal worm, described lower extension bar be upper and lower end opening hollow stem, institute
The lower extension bar stated is connected and connected with main forwardtransfer signal worm, and described lower extension bar lower end is stretched into sand control screen, described lower extension bar
Multiple air intakes 21 being in sand control screen are provided with, described air intake is provided with into gas check valve.
Carbon dioxide can not only be dissolved in crude oil, and the hydrocarbon molecules in crude oil can also enter gas phase.And absorb dioxy
Change the crude oil after carbon, saturation pressure rises, and viscosity drastically reduces, and the viscous crude drop so as to be directly realized by a certain extent sticks.
In oil recovery process, carbon dioxide air feed pump can be supplied, and carbon dioxide enters through sucker rod, main forwardtransfer signal worm, lower extension bar
Sand control screen, after crude oil is externally entering sand control screen, the direct absorbing carbon dioxide of meeting, reach mixed phase state.Absorb titanium dioxide
Crude oil after carbon drop is glutinous, heavy water oil storage cavity can be ascended into more easily originally by comparing, so as to which compared with original, same takes out
Oily energy consumption, higher proportion of crude oil can be allowed to enter main oil pipe.In addition, the electric heating device of the present invention, although can reach well
Into heating and be dielectrically separated from, but sucker rod internal temperature can be in a higher state all the time, if separately being analyzed,
Heat in sucker rod, outside cable can still be taken away by absorbing quickly, play the glutinous effect of drop, but on the external insulation jacket of cable with
And the heat in external insulation jacket, scatter and disappear just very slow, so as to which cable self-temperature can be caused too high, external insulation jacket is easily
It is impaired, and constantly by carbon dioxide in sucker rod, can effectively take away these is difficult to quick dispersed heat, reaches cooling
The effect of protection, also, these heats are via the carrying of carbon dioxide, the crude oil that can be directly conducted to again in sand control screen, from
And allow the crude oil in sand control screen glutinous by drop, so as to be extracted, lift more easily, avoid the crude oil in sand control screen
Temperature is in below pour point, so as to ensure the smooth collection of crude oil.
All air intakes are vertically arranged in a straight line, and the interior interval that is provided with of described sand control screen enters air-casing 22, under described
Extension bar and interval enter rotation connection and lower extension bar outer wall and interval between air-casing and sealed between entering air-casing inwall, and described interval enters
Air-casing is provided with the vertical blowhole 23 of a row, the connection corresponding with one of air intake of each blowhole.Carbon dioxide is
Supplied, because heavy crude reservoir is in deep-sea, therefore supply gas pressure also there are certain requirements, in order to keep away by carbon dioxide air feed pump
It is not smooth to exempt from carbon dioxide outlet, ensures thinning effect, employs above-mentioned structure, after carbon dioxide reaches lower extension bar bottom, and
It can not continue to discharge, during lower extension bar rotates together with sucker rod, as long as air intake is not to upper blowhole, then
Carbon dioxide in air flue (sucker rod, main forwardtransfer signal worm, the interior road of lower extension bar three) will be accumulated, and pressure rises, until under
After extension bar turns to air intake to upper blowhole, the possibility of outlet is now just had, if now air pressure can squeeze in air flue
Seawater and crude oil, then just have carbon dioxide and enter sand control screen, realize that combining drop sticks, if air pressure is even not in air flue
Foot, it will continue to accumulate gas, until air intake to upper blowhole, is circulated with this next time.Consequently, it is possible to two would not be required
Carbonoxide air feed pump has great supply gas pressure, but intermittently can adaptively be supplied.And so discharge
Gas, it may have higher instantaneous air pressure, can preferably wash sticky crude oil, lifting and the combination degree of crude oil open.
Described lower extension bar is provided with multiple mixed gas ports 24, and described mixed gas port is provided with mixed gas check valve, under described
Extension bar is externally provided with the mixed air-casing 25 of interval, rotation connection and lower extension bar outer wall and interval between described lower extension bar and the mixed air-casing of interval
Sealed between mixed air-casing inwall, described interval is mixed air-casing and is between anti-straight suction lagging and screw pump, and described interval is mixed
Air-casing is provided with some gas mixed holes 26, and each gas mixed hole can mix the corresponding connection of gas port with one of them.The principle of mixed gas port with
Air intake is essentially identical, and difference is, relatively small (the comparing air intake) that can set total bore of mixed gas port, this
It is because the carbon dioxide that air intake provides, being, amount bigger also more viscous sand control screen in crude oil lower with relative temperature
It is combined, and the carbon dioxide of mixed gas port discharge, it is only necessary to straight inhale that relative viscosity above lagging is lower, purity with anti-
Higher crude oil is combined.But, no matter and mixed gas port, total bore of air intake, it is single for effect, carried at mixed gas port
The carbon dioxide of confession, can combine it is glutinous will further to reach mixed phase drop into the higher crude oil of the purity of screw pump.Also,
The heat carried on this partial CO 2 (cooling to cable, i.e., crossed by electric cable heating), is directly conducted to purity relatively more
High crude oil (the anti-straight medium inhaled above lagging), and the seldom of seawater is directly conducted to, so heat utilization efficiency is higher.Therefore
Mixed gas port, air intake and dependency structure, have different, but all very effective drop sticks function.
Sponge cylinder layer 27 is provided between described sucker rod and cable, described sponge cylinder layer is connected to sucker rod inwall
On, threading hole is provided with described sponge cylinder layer, described cable passes through threading hole, and described sponge cylinder layer is by cable with pumping
Bar separates.Hollow sucker rod is the primary structure heated to viscous crude, and the structure of relatively-high temperature, and the cable in it is simultaneously
Non-rigid (for cost, the consideration expanded with heat and contract with cold with installation difficulty, it is also difficult to be arranged to rigidity), easily encounters in sucker rod
Wall, so, external insulation jacket are easy for, because temperature is too high and impaired, causing inside conductor to be likely to be exposed sucker rod, are formed
Local " short circuit ", influences heating effect.And the presence of sponge cylinder layer, it is possible to prevente effectively from this problem.Also, sponge cylinder layer is simultaneously
Do not interfere with carbon dioxide and enter air flue in lower extension bar, conversely can also have certain anti-gas reverse back ability.
The upper end open of described sucker rod connects with the water side of a supply-water pump 28, and the water inlet end of described supply-water pump connects
Water receiving source.Viscous crude is heated drop outside sucker rod, in main oil pipe and sticked, but, the viscous crude below screw pump, near sand control screen,
Relative heating is with regard to much less, and its position is deeper in addition, and these local crude oil, which probably also have not reaching greatly, to incline
Point, it is difficult so to may result in oil pumping.But on the relatively higher position of oil pick-up tube, due to constantly heating, oil temperature, which can exceed, inclines
Point is more, and this is the waste of heat, and the weak point of a whole set of heating arrangement.And there is the gas of foregoing carbon dioxide
Road, then after coordinating sponge cylinder layer and supply-water pump, provide for more preferable heating effect.Water source can directly take seawater,
May also be other water sources, water through sucker rod, main forwardtransfer signal worm, lower extension bar three interior road after, because the heating of cable (is in fact
Cooling of the water to cable, the cooling effect of water are far superior to carbon dioxide, it is ensured that will not be impaired because overheating inside and outside cable),
Through as gas, also, because the presence of sponge cylinder layer, water can be first adsorbed, then by thermal evaporation, also do not filled also in the absence of water
Heating is divided to be put into lower contact to the situation of crude oil.Water after these gasifications, as carbon dioxide, can play heating medium
Effect, and because the specific heat of water is big, heat capacity is much better than.Heat is taken straight to below screw pump, sand control screen
It is interior etc. so that the crude oil at sand control screen can heat up more, so as to there is higher proportion of crude oil temperature to exceed pour point,
It is set smoothly to be lifted.Said process, pass through medium (gaseous mixture of water vapour or water vapour and carbon dioxide) so that take out
A part of utilization rate is relatively low in oil pipe or even can be described as the heat that can be wasted originally, be provided to greater need for position it is (anti-
The oil temperature such as sand sieve pipe lower part), effect is lifted so as to effectively improve the oil stream of entirety of the invention, reduces heat loss.And enter
Liquid can be changed into again by entering the vapor of lower section, after heavy water oil storage cavity is reached, separated, be layered with crude oil.
Described main oil pipe is provided with tubing centrilizer 29, and described tubing centrilizer tip height is high with oil well cylinder top
Degree is consistent, and heating chamber is provided with described tubing centrilizer, heater 30, the heating head of heater are provided with described heating chamber
31 stretch into main oil pipe, and described water proof inside pipe wall is provided with heat-insulation layer.Tubing centrilizer belongs to routine techniques, mainly can be to prevent
Only main oil pipe skew is excessive.Inner space is opened up using tubing centrilizer, extra heater is set, then may be coextruded and add
Heat.In some special positions, carry out middle heating and be in so that not having one section of long crude oil oil temperature in main oil pipe
Below pour point, the smooth lifting of oil stream is maintained.Oil well cylinder top is a cut-off rule, then is exactly upwards marine riser, oil pipe righting
Device should be arranged in oil well cylinder, should not be arranged on marine riser (material and intensity are limited).And in main oil pipe, to a certain extent and
Speech, more upward, higher to the requirement of crude oil low viscosity (single from local crude oil angle, certain part crude oil present position is higher, lifts
Liter power consumption, difficulty are bigger), it is desirable that the viscosity of eminence crude oil also will not be too high, so as to make oil stream lifting smooth, and add
Hot device can then play reheating, the function of composite heating, maintain the low viscosity of crude oil in interlude, increase the lifting of oil stream
Inertia, the fluid ability that crude oil is overall in main oil pipe is allowed to become stronger.
Described external insulation jacket includes multiple insulation sleeve sections 32, and the inwall of described insulation sleeve section compresses inside conductor, phase
Elastic connection drum 33 is provided between adjacent insulation sleeve section, be formed in one structure between described elastic connection drum and insulation sleeve section,
There is gap between described elastic connection drum inwall and inside conductor.Cable length is very long, there is a km on hundreds of, after heating power
Inside conductor has obvious elongated, the inwall compression inside conductor of insulation sleeve section, so movement can be driven by heated elongated inside conductor,
So as to more opening for adjacent insulation sleeve Duan Huifen, and elastic connection drum is then stretched, between elastic connection is roused between inwall and inside conductor
Gap diminishes so that external insulation jacket can better adapt to the change of inside conductor on the whole.
Claims (7)
1. a kind of deep-sea viscous crude harvester, it is characterized in that, including the hollow sucker rod of main oil pipe, upper end open, stretch into sea
Oil well cylinder under bed mud line, described oil well cylinder, which is provided with one, has the marine riser of inner chamber, and described riser top is stretched out
Sea, it is tightly connected between the barrel of oil well cylinder and the tube wall of marine riser, main oil pipe passes through the inner chamber of marine riser, main oil pipe lower end
Stretch into oil well cylinder, screw pump, the upper end of the main forwardtransfer signal worm of described screw pump and sucker rod are provided with described main oil pipe
Lower end be connected, described screw pump is at the lower end of main oil pipe, has perforation shell hole on described oil well cylinder, described penetrates
Hole shell hole stretches into oil reservoir, and bottom is provided with sand control screen in described oil well cylinder, has screen casing at the top of described sand control screen
Oil-out, described screen casing oil-out are communicated with the oil inlet of screw pump, and screen casing packer is provided with described oil well cylinder, described
Sand control screen pass through screen casing packer, be tightly connected between described sand control screen outer wall and screen casing packer, described sieve
It is tightly connected between pipe packer and oily shaft in wall, cable is provided with described sucker rod, the connection of described cable one end supplies
Power supply, the bottom of cable other end connecting with pumping rod, the top of described sucker rod take back power supply source, described electricity by electric wire
Cable includes inside conductor, external insulation jacket, is insulated between described sucker rod and the main forwardtransfer signal worm of screw pump, in addition to a well head
Oil well pump, described well head oil well pump are provided with an oil pick-up tube, and described oil pick-up tube one end is stretched into main oil pipe, the oil pick-up tube
The pipe range for stretching into main oil pipe inside points is more than 20 meters, and described sucker rod is provided with elastic righting section, described elastic righting section
Ring is connect including the righting section for being connected with sucker rod lateral wall, righting section is connected to and connects elastic housing washer on ring, described bullet
Property outer ring external diameter be the 50% to 90% of main pipe aperture, be provided with tubing packer, described main oil in described oil well cylinder
It is tightly connected, is tightly connected between described tubing packer and oily shaft in wall, oil pipe between pipe outer wall and tubing packer
Packer, screen casing packer, oil well cylinder inwall between form heavy water oil storage cavity, the bore of described heavy water oil storage cavity is more than anti-
The bore of sand sieve pipe, the main forwardtransfer signal worm lower end of described screw pump connect extension bar, are provided with described heavy water oil storage cavity
Anti- directly to inhale lagging, described anti-lagging of directly inhaling is connected on lower extension bar, and described anti-straight suction lagging outer ledge is with sinking
The passage that oils is formed between the cavity wall of water oil storage cavity, described lower extension bar is provided with more agitation cross bars, described agitation cross bar
One end is fixed on lower extension bar, and described agitation cross bar is in below anti-straight suction lagging, and described external insulation jacket includes more
Individual insulation sleeve section, the inwall of described insulation sleeve section compress inside conductor, and being provided with elastic connection between adjacent insulation sleeve section rouses, described
Elastic connection drum and insulation sleeve section between be formed in one structure, have between described elastic connection drum inwall and inside conductor
Gap.
2. a kind of deep-sea viscous crude harvester according to claim 1, it is characterized in that, described sucker rod lower ending opening,
The main forwardtransfer signal worm of described screw pump is the cored screw of upper and lower end opening, and the upper end open of described sucker rod connects one
Individual carbon dioxide air feed pump, described carbon dioxide air feed pump connection carbon dioxide air source, described sucker rod and main work spiral shell
Connected between bar, described lower extension bar is the hollow stem of upper and lower end opening, and described lower extension bar is connected and connected with main forwardtransfer signal worm
Logical, described lower extension bar lower end is stretched into sand control screen, and described lower extension bar enters gas provided with multiple be in sand control screen
Mouthful, described air intake is provided with into gas check valve.
3. a kind of deep-sea viscous crude harvester according to claim 2, it is characterized in that, all air intakes are vertically arranged in one
Straight line, interval is provided with described sand control screen and enters air-casing, described lower extension bar and interval enter between air-casing rotation connection and under
Extension bar outer wall and interval seal between entering air-casing inwall, and described interval enters air-casing and is provided with the vertical blowhole of a row, each
Blowhole can connection corresponding with one of air intake.
4. a kind of deep-sea viscous crude harvester according to claim 3, it is characterized in that, described lower extension bar is provided with multiple
Mixed gas port, described mixed gas port are provided with mixed gas check valve, and described lower extension bar is externally provided with the mixed air-casing of interval, described lower extension bar
Sealed between the mixed air-casing of interval between rotation connection and lower extension bar outer wall and the mixed air-casing inwall of interval, described interval mixes air-casing
It is between anti-straight suction lagging and screw pump, described interval mixes air-casing and is provided with some gas mixed holes, each gas mixed hole
With one of them mix gas port it is corresponding connection.
5. a kind of deep-sea viscous crude harvester according to claim 1, it is characterized in that, between described sucker rod and cable
Provided with sponge cylinder layer, described sponge cylinder layer is connected on sucker rod inwall, and threading hole is provided with described sponge cylinder layer, described
Cable pass through threading hole, described sponge cylinder layer separates cable and sucker rod.
6. a kind of deep-sea viscous crude harvester according to claim 5, it is characterized in that, the upper end open of described sucker rod
Connected with the water side of a supply-water pump, the water inlet end connection water source of described supply-water pump.
7. a kind of deep-sea viscous crude harvester according to claim 1, it is characterized in that, described main oil pipe is provided with oil pipe
Centralizer, described tubing centrilizer tip height is consistent with oil well cylinder tip height, is provided with and adds in described tubing centrilizer
Hot chamber, described heating chamber is interior to be provided with heater, and the heating head of heater is stretched into main oil pipe, is set on described water proof inside pipe wall
There is heat-insulation layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510113964.1A CN104806207B (en) | 2015-03-16 | 2015-03-16 | A kind of deep-sea viscous crude harvester |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510113964.1A CN104806207B (en) | 2015-03-16 | 2015-03-16 | A kind of deep-sea viscous crude harvester |
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| CN104806207A CN104806207A (en) | 2015-07-29 |
| CN104806207B true CN104806207B (en) | 2018-04-06 |
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| CN204140045U (en) * | 2014-10-13 | 2015-02-04 | 中国石油化工股份有限公司 | Deep layer super heavy oil recovery-mixing light oil and wellbore electric heating compound viscosity reduction lifting device |
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