CN104818974A - Viscosity reduction collection well - Google Patents
Viscosity reduction collection well Download PDFInfo
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- CN104818974A CN104818974A CN201510113268.0A CN201510113268A CN104818974A CN 104818974 A CN104818974 A CN 104818974A CN 201510113268 A CN201510113268 A CN 201510113268A CN 104818974 A CN104818974 A CN 104818974A
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- oil
- sucker rod
- extension bar
- casing
- air
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- 239000003921 oil Substances 0.000 claims abstract description 109
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 72
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 36
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000003129 oil well Substances 0.000 claims description 38
- 239000004576 sand Substances 0.000 claims description 38
- XLYOFNOQVPJJNP-ZSJDYOACSA-N Heavy water Chemical compound [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 claims description 36
- 238000010438 heat treatment Methods 0.000 claims description 22
- 238000009413 insulation Methods 0.000 claims description 19
- 238000004519 manufacturing process Methods 0.000 claims description 18
- 239000004020 conductor Substances 0.000 claims description 16
- 238000009422 external insulation Methods 0.000 claims description 12
- 238000005086 pumping Methods 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 11
- 239000008400 supply water Substances 0.000 claims description 8
- 244000273618 Sphenoclea zeylanica Species 0.000 claims description 3
- 238000011534 incubation Methods 0.000 claims description 3
- 239000010779 crude oil Substances 0.000 abstract description 47
- 238000000034 method Methods 0.000 abstract description 14
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000000605 extraction Methods 0.000 abstract 2
- 238000005553 drilling Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 18
- 239000013535 sea water Substances 0.000 description 16
- 238000001816 cooling Methods 0.000 description 4
- 230000001771 impaired effect Effects 0.000 description 4
- 238000011084 recovery Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005485 electric heating 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
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000002207 thermal evaporation Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The invention discloses a viscosity reduction collection well. According to the viscosity reduction collection well, in the oil extraction process, viscosity reduction treatment can be carried out on thickened oil with the higher viscosity, and therefore thickened oil liquidity can be improved, and the smooth extraction of oil in thick oil reservoirs can be ensured. The viscosity reduction collection well comprises a main oil pipe, a hollow sucker rod and an oil shaft. A drilling riser is arranged in the oil shaft, and the lower end of the main oil pipe stretches into the oil shaft; a screw pump is arranged in the main oil pipe, and a main working screw rod of the screw pump is connected with the sucker rod; a sand-prevention screen pipe is arranged in the lower part of the oil shaft, and a screen pipe oil outlet is formed in the top of the sand-prevention screen pipe; the screen pipe oil outlet is communicated with an oil inlet of the screw pump, and a cable is arranged in the sucker rod; and one end of the cable is connected with a power source. The viscosity reduction collection well has the beneficial effects that the thickened oil can be reasonably heated, so that the viscosity of the thickened oil is reduced, and collection is facilitated; and carbon dioxide gas and water steam can be led into the well, and therefore the viscosity of crude oil to be lifted and crude oil in the lifting process can be reduced.
Description
Technical field
The invention belongs to oil reservoir production technique field, particularly relate to one and fall glutinous production wells.
Background technology
Heavy crude reservoir is widely distributed in the world, and according to statistics, viscous crude (comprising pitch) reservoir geology reserves are at least at more than 4 times of explored conventional crude reserves, and optimistic estimate even can more than 6 times.Along with people are to the exploration of deep water, deep water viscous crude receives the concern more and more come, and its exploitation development activities is also launched all over the world.
But, the deepwater depth of water is residing general at 500 to 2500 meters, due to the factor such as its degree of depth is darker, a low-temperature region can be formed in seabed, in addition the temperature sensitivity of viscous crude, and itself viscosity is higher, therefore in low-temperature region meeting flow difficulties, lose flowability even gradually, make oil well cannot maintain normal production.
Summary of the invention
The present invention is to overcome deficiency of the prior art, provides a kind of rational in infrastructure, can fall glutinous process by the viscous crude higher to viscosity, thus improve viscous crude mobility in oil recovery process, and what can ensure that heavy crude reservoir gathers smoothly falls glutinous production wells.
To achieve these goals, the present invention is by the following technical solutions:
Glutinous production wells falls in one, comprise main oil pipe, the hollow sucker rod of upper end open, stretch into the oil well cylinder under the mud line of seabed, described oil well cylinder is provided with the marine riser that has inner chamber, described riser top stretches out sea, be tightly connected between the barrel of oil well cylinder and the tube wall of marine riser, main oil pipe is through the inner chamber of marine riser, main oil pipe lower end is stretched in oil well cylinder, screw pump is provided with in described main oil pipe, the upper end of main forwardtransfer signal worm of described screw pump is connected with the lower end of sucker rod, described screw pump is in the lower end of main oil pipe, described oil well cylinder has perforation shell hole, described perforation shell hole stretches into oil reservoir, in described oil well cylinder, bottom is provided with sand control screen, described sand control screen top has screen casing oil-out, described screen casing oil-out communicates with the oil-in of screw pump, screen casing packer is provided with in described oil well cylinder, described sand control screen is through screen casing packer, be tightly connected between described sand control screen outer wall and screen casing packer, be tightly connected between described screen casing packer and oily shaft in wall, cable is provided with in described sucker rod, described cable one end connects power supply source, the bottom of cable other end connecting with pumping rod, the top of described sucker rod takes back power supply source by electric wire, described cable comprises inside conductor, external insulation jacket, insulate between described sucker rod and the main forwardtransfer signal worm of screw pump, described oil well cylinder offers some anti-depression holes stretched in the mud layer of seabed, anti-depression beam is provided with in described anti-depression hole, concrete is filled with between described anti-depression hole and anti-depression beam, described oily wellbore bottom is provided with at least two default stake bars, the bottom of screen casing packer is withstood in described default stake masthead portion.
As preferably, tubing packer is provided with in described oil well cylinder, be tightly connected between described main oil pipe outer wall and tubing packer, be tightly connected between described tubing packer and oily shaft in wall, form heavy water oil storage cavity between the inwall of tubing packer, screen casing packer, oil well cylinder, the bore of described heavy water oil storage cavity is greater than the bore of sand control screen.
As preferably, the main forwardtransfer signal worm lower end of described screw pump connects extension bar, be provided with in described heavy water oil storage cavity and prevent directly inhaling lagging, described anti-straight lagging of inhaling is connected on lower extension bar, described anti-straight suction between lagging outer ledge and the chamber wall of heavy water oil storage cavity forms the passage that oils, described lower extension bar is provided with many stirring cross bars, and described stirring cross bar one end is fixed on lower extension bar, and described stirring cross bar is in below anti-straight suction lagging.
As preferably, described sucker rod lower ending opening, the main forwardtransfer signal worm of described screw pump is upper, the cored screw of lower ending opening, the upper end open of described sucker rod connects a carbon dioxide air feed pump, described carbon dioxide air feed pump connects carbon dioxide air source, be communicated with between described sucker rod with main forwardtransfer signal worm, described lower extension bar is upper, the hollow stem of lower ending opening, described lower extension bar is connected with main forwardtransfer signal worm and is communicated with, described lower extension bar lower end is stretched in sand control screen, described lower extension bar is provided with multiple air intake be in sand control screen, described air intake is provided with into gas one way valve.
As preferably, all air intakes vertically arrange in a straight line, be provided with interval in described sand control screen and enter air-casing, described lower extension bar and interval enter to be rotationally connected between air-casing and lower extension bar outer wall and interval enter between air-casing inwall to seal, described interval enters air-casing and is provided with the vertical blowhole of a row, and each blowhole is all corresponding with one of them air intake to be communicated with.
As preferably, described lower extension bar is provided with multiple mixed gas port, described mixed gas port is provided with mixed gas one way valve, the mixed air-casing of interval is provided with outside described lower extension bar, be rotationally connected between described lower extension bar and the mixed air-casing of interval and seal between lower extension bar outer wall and the mixed air-casing inwall of interval, described interval is mixed air-casing and is between anti-straight suction lagging and screw pump, and described interval is mixed air-casing and is provided with some gas mixed holes, and each gas mixed hole all can correspondingly with one of them mixed gas port be communicated with.
As preferably, be provided with sponge cylinder layer between described sucker rod and cable, described sponge cylinder layer is connected on sucker rod inwall, is provided with through wires hole in described sponge cylinder layer, and described cable is through through wires hole, and cable and sucker rod separate by described sponge cylinder layer.
As preferably, the upper end open of described sucker rod is communicated with the water side of a supply-water pump, and the water inlet end of described supply-water pump connects water source.
As preferably, described main oil pipe is provided with tubing centrilizer, described tubing centrilizer tip height is consistent with oil well cylinder tip height, heating chamber is provided with in described tubing centrilizer, heater is provided with in described incubation cavity, the heating head of heater stretches in main oil pipe, and described marine riser inwall is provided with insulation layer.
As preferably, described external insulation jacket comprises multiple insulation sleeve section, the inwall of described insulation sleeve section compresses inside conductor, be provided with elasticity between adjacent insulation sleeve section and connect drum, be formed in one between described elasticity connection drum with insulation sleeve section structure, has gap between described elasticity connection drum inwall and inside conductor.
The invention has the beneficial effects as follows: rationally can heat viscous crude, its viscosity is reduced, is beneficial to collection; Carbon dioxide and steam can being passed into, rise to being about to, and the crude oil in uphill process carrying out falling glutinous; Provide cooling protection function in venting process, guardwire simultaneously, prevent it impaired; There is different mixed gas fall and cohere structure, distribute heat and gas on the whole more scientificly, promote crude oil viscosity lowering effect further, ensure the efficiency of recovering the oil and effect.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is that the present invention sinks the structural representation at water oil storage cavity place;
Fig. 3 is the structural representation at air intake place of the present invention;
Fig. 4 is the structural representation that the present invention's interval enters air-casing place;
Fig. 5 is the structural representation at the mixed air-casing place of the present invention's interval;
Fig. 6 is the structural representation of sucker rod inside of the present invention;
Fig. 7 is the structural representation of cable of the present invention;
Fig. 8 is the structural representation at the present invention anti-depression hole place.
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 8, oil reservoir 9, sand control screen 10, screen casing packer 11, cable 12, external insulation jacket 13, tubing packer 14, heavy water oil storage cavity 15, lower extension bar 16, anti-straight suction lagging 17, oil passage 18, stir 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, tubing centrilizer 29, gap 30, inside conductor 31, insulation sleeve section 32, elasticity connects drum 33, anti-depression beam 34, concrete 35, seabed mud layer 36, preset stake bar 37.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
As Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, in embodiment shown in Fig. 8, glutinous production wells falls in one, comprise main oil pipe 1, the hollow sucker rod 2 of upper end open, stretch into the oil well cylinder 4 under seabed mud line 3, described oil well cylinder is provided with the marine riser 5 that has inner chamber, described riser top stretches out sea 6, be tightly connected between the barrel of oil well cylinder and the tube wall of marine riser, main oil pipe is through the inner chamber of marine riser, main oil pipe lower end is stretched in oil well cylinder, screw pump 7 is provided with in described main oil pipe, the upper end of main forwardtransfer signal worm of described screw pump is connected with the lower end of sucker rod, described screw pump is in the lower end of main oil pipe, described oil well cylinder has perforation shell hole 8, described perforation shell hole stretches into oil reservoir 9, in described oil well cylinder, bottom is provided with sand control screen 10, described sand control screen top has screen casing oil-out, described screen casing oil-out communicates with the oil-in of screw pump, screen casing packer 11 is provided with in described oil well cylinder, described sand control screen is through screen casing packer, be tightly connected between described sand control screen outer wall and screen casing packer, be tightly connected between described screen casing packer and oily shaft in wall, cable 12 is provided with in described sucker rod, described cable one end connects power supply source, the bottom of cable other end connecting with pumping rod, the top of described sucker rod takes back power supply source by electric wire, described cable comprises inside conductor 31, external insulation jacket 13, insulate between described sucker rod and the main forwardtransfer signal worm of screw pump, described oil well cylinder offers some anti-depression holes stretched in seabed mud layer 36, anti-depression beam 34 is provided with in described anti-depression hole, concrete 35 is filled with between described anti-depression hole and anti-depression beam, described oily wellbore bottom is provided with at least two default stake bars 37, the bottom of screen casing packer is withstood in described default stake masthead portion.
Cable stretches in hollow sucker rod, and the two connects in the bottom of sucker rod, then mixes power supply source, electric wire, and form a heating circuit, electric current flows into through cable, and flowed out by hollow sucker rod, outer insulating bag cover carries out electric isolution.When having alternating current by above-mentioned heating circuit, because of the factor such as conduction heat production of kelvin effect, kindred effect, hysteresis effect and cable itself, acting in conjunction is generated heat.The viscous crude that viscosity is higher passes through screw pump, main oil pipe carries out carrying, hollow sucker rod is then within main oil pipe, first for the main forwardtransfer signal worm of connecting screw rod pump (no matter single-screw (single screw) pump, multi screwpump, at least all can have main forwardtransfer signal worm, in order to accept the input of power) carry out driven rotary, oil pumping, oil stream lifting action, second the heat it produced is taken away by the medium of institute's lifting (oil stream), achieve the overall process heating from bottom to top of main oil pipe inside viscous crude, thus reach heat fall glutinous, improve the object of its mobility and raising oil well lifting effect.
Tubing packer 14 is provided with in described oil well cylinder, be tightly connected between described main oil pipe outer wall and tubing packer, be tightly connected between described tubing packer and oily shaft in wall, form heavy water oil storage cavity 15 between the inwall of tubing packer, screen casing packer, oil well cylinder, the bore of described heavy water oil storage cavity is greater than the bore of sand control screen.In the process of oil reservoir exploitation, must have the process of conveying of recovering the oil, this process normally adopts kinetic pump (as screw pump) to carry out the lifting of pumping and to crude oil.And in practice, be extracted and will not only have crude oil with the medium of lifting, but can a large amount of impurity and seawater etc. be contained, in some cases, moisture content even can (oil reservoir viscosity be too high more than ninety percent, be difficult to extract, thus a large amount of relatively runny seawater can be extracted into, or the more high factor of the moisture content of oil reservoir own causes).Crude oil (viscous crude) is together with seawater, after entering from sand control screen, under the effect of screw pump suction, start to rise, now can be introduced into heavy water oil storage cavity, the bore of heavy water oil storage cavity is larger, therefore crude oil, seawater can short stay herein, because crude oil herein has been drawn up the crude oil come, therefore viscosity is low relative to the viscous crude in oil reservoir, relative also rarer.Crude oil, seawater can start preliminary layering in heavy water oil storage cavity, water downwards, oil upwards, substantial oil can closer to the oil pumping end of screw pump, thus effectively can improve the pumping efficiency of screw pump, reduce by the ratio of lifting seawater, reduce additional energy, promote oil recovery effect.And the seawater of sedimentation downwards, along with follow-up crude oil continue enter, upper lower leaf, constantly can be extruded downwards, forever rest on bottom or flow back to oil reservoir region.
The main forwardtransfer signal worm lower end of described screw pump connects extension bar 16, anti-straight suction lagging 17 is provided with in described heavy water oil storage cavity, described anti-straight lagging of inhaling is connected on lower extension bar, described anti-straight suction between lagging outer ledge and the chamber wall of heavy water oil storage cavity forms the passage 18 that oils, described lower extension bar is provided with many stirring cross bars 19, described stirring cross bar one end is fixed on lower extension bar, and described stirring cross bar is in below anti-straight suction lagging.After crude oil flows out from sand control screen upper end together with seawater, inhale crude oil in order to avoid screw pump direct and cause sucking a large amount of seawater simultaneously, spy arranges one and prevents directly inhaling lagging, after having had anti-straight suction lagging, crude oil (viscous crude) and seawater all need by winding raod footpath, just can reach anti-straight inhale above lagging via the passage that oils, screw pump oil pumping end below, in the process, being separated of crude oil and seawater can be carried out better, make its layering.Moreover, lower extension bar has stirring cross bar, therefore, viscous crude and seawater are in the process being separated layering, and the crude oil of thickness can be stirred, thus dispersion is fallen glutinous, so can crude oil be allowed better to rise, compressing seawater sinks, and anti-straight lagging upper liquid Crude Oil ratio of inhaling is promoted further, thus can improve pumping efficiency better.
Described sucker rod lower ending opening, the main forwardtransfer signal worm of described screw pump is upper, the cored screw of lower ending opening, the upper end open of described sucker rod connects a carbon dioxide air feed pump 20, described carbon dioxide air feed pump connects carbon dioxide air source, be communicated with between described sucker rod with main forwardtransfer signal worm, described lower extension bar is upper, the hollow stem of lower ending opening, described lower extension bar is connected with main forwardtransfer signal worm and is communicated with, described lower extension bar lower end is stretched in sand control screen, described lower extension bar is provided with multiple air intake 21 be in sand control screen, described air intake is provided with into gas one way valve.
Carbon dioxide can not only be dissolved in crude oil, and the hydrocarbon molecules in crude oil also can enter gas phase.And absorbing the crude oil after carbon dioxide, saturation pressure rises, and viscosity sharply reduces, thus can fall glutinous by the viscous crude directly realized to a certain extent.In oil recovery process, carbon dioxide air feed pump can carry out air feed, and carbon dioxide enters into sand control screen through sucker rod, main forwardtransfer signal worm, lower extension bar, and after crude oil enters sand control screen from outside, the direct absorbing carbon dioxide of meeting, reaches mixed phase state.Crude oil after sticking falls in absorbing carbon dioxide, and comparing can rise originally more easily enters heavy water oil storage cavity, thus compared with originally, same oil pumping energy consumption, can allow more a high proportion of crude oil enter main oil pipe.In addition, electric heating device of the present invention, although heating and insulation isolation can be reached well, but sucker rod internal temperature can be in a higher state all the time, separately carry out the words analyzed, in sucker rod, heat outside cable still can be absorbed quickly to be taken away, play and fall glutinous effect, but the heat on the external insulation jacket of cable and in external insulation jacket, scatter and disappear just very slow, thus cable self-temperature can be caused too high, external insulation jacket is very easily impaired, and in sucker rod, constantly pass through carbon dioxide, effectively can take away these and be difficult to quick dispersed heat, reach the effect of cooling protection, and, these heats carrying via carbon dioxide, can directly conduct to the crude oil in sand control screen again, thus it is glutinous to make the crude oil in sand control screen to be fallen, thus be extracted more easily, lifting, the crude oil temperature in sand control screen is avoided to be in below pour point, thus ensure the smooth collection of crude oil.
All air intakes vertically arrange in a straight line, be provided with interval in described sand control screen and enter air-casing 22, described lower extension bar and interval enter to be rotationally connected between air-casing and lower extension bar outer wall and interval enter between air-casing inwall to seal, described interval enters air-casing and is provided with the vertical blowhole of a row 23, and each blowhole is all corresponding with one of them air intake to be communicated with.Carbon dioxide is supplied by carbon dioxide air feed pump, because heavy crude reservoir is in deep-sea, therefore supply gas pressure also be there are certain requirements, in order to avoid carbon dioxide is given vent to anger not smooth, ensure thinning effect, have employed above-mentioned structure, after carbon dioxide reaches lower extension bar bottom, can not continue to discharge, in the process of rotating together along with sucker rod at lower extension bar, as long as air intake is not to upper blowhole, so air flue (sucker rod, main forwardtransfer signal worm, the interior road of lower extension bar three) in carbon dioxide will accumulate, pressure increase, until lower extension bar turns to air intake to after upper blowhole, now just have the possibility of giving vent to anger, if now air flue internal gas pressure can squeeze seawater and crude oil, so just have carbon dioxide and enter into sand control screen, realizing combination falls glutinous, if even air flue internal gas pressure is not enough, accumulation gas will be continued, until next time air intake to upper blowhole, circulate with this.Thus, would not require that carbon dioxide air feed pump has great supply gas pressure, but intermittently self adaptation air feed can be carried out.And the gas of discharging like this, also has higher instantaneous air pressure, can wash the crude oil of thickness better open, promote the combination degree with crude oil.
Described lower extension bar is provided with multiple mixed gas port 24, described mixed gas port is provided with mixed gas one way valve, the mixed air-casing 25 of interval is provided with outside described lower extension bar, be rotationally connected between described lower extension bar and the mixed air-casing of interval and seal between lower extension bar outer wall and the mixed air-casing inwall of interval, described interval is mixed air-casing and is between anti-straight suction lagging and screw pump, described interval is mixed air-casing and is provided with some gas mixed holes 26, and each gas mixed hole all can correspondingly with one of them mixed gas port be communicated with.The principle of mixed gas port is substantially identical with air intake, difference is, relatively little (the comparing air intake) that total bore of mixed gas port can be arranged, this is because, the carbon dioxide that air intake provides is lower with relative temperature, and in the larger also more viscous sand control screen of amount, crude oil carries out combining, and the carbon dioxide that mixed gas port is discharged, only need directly to inhale the crude oil that above lagging, relative viscosity is lower, purity is higher combine with anti-.But, no matter total and the bore of mixed gas port, air intake, singly say from effect, the carbon dioxide that mixed gas port place provides, crude oil that can be higher in conjunction with the purity that will enter screw pump, reaches mixed phase further and falls glutinous.And, the heat that this part carbon dioxide (cable was lowered the temperature, is namely crossed by electric cable heating) carries, directly conduction is to the relative higher crude oil of purity (the anti-straight medium inhaled above lagging), and it is little directly to conduct to seawater, so heat utilization efficiency is higher.Therefore mixed gas port, air intake and dependency structure, have different, but all very effective fall glutinous function.
Be provided with sponge cylinder layer 27 between described sucker rod and cable, described sponge cylinder layer is connected on sucker rod inwall, is provided with through wires hole in described sponge cylinder layer, and described cable is through through wires hole, and cable and sucker rod separate by described sponge cylinder layer.Hollow sucker rod is the primary structure heated viscous crude, also be the structure of relatively-high temperature, cable in it also non-rigidly (for cost, to expand with heat and contract with cold and the consideration of installation difficulty, also be difficult to be arranged to rigidity), easily encounter sucker rod inwall, so, just easy Yin Wendu is too high and impaired for external insulation jacket, cause inside conductor to touch sucker rod, form local " short circuit ", affect heating effect.And the existence of sponge cylinder layer, can effectively avoid this problem.Further, sponge cylinder layer can't affect carbon dioxide and enter into air flue in lower extension bar, also can have certain anti-gas reverse back ability on the contrary.
The upper end open of described sucker rod is communicated with the water side of a supply-water pump 28, and the water inlet end of described supply-water pump connects water source.Viscous crude is outer at sucker rod, added heat drop in main oil pipe sticks, but, and the viscous crude below screw pump, near sand control screen, relative intensification is with regard to much less, in addition its position is darker, and the crude oil in these places probably also has a big chunk not reach pour point, will cause oil pumping difficulty like this.But on the position that oil pick-up tube is relatively higher, due to continuous heating, it is more that oil temperature can exceed pour point, this is the waste of heat, is also the weak point of a whole set of heating arrangement.And had the air flue of foregoing carbon dioxide, then after coordinating upper sponge cylinder layer and supply-water pump, just can provide better heating effect.Seawater directly can be taken in water source, may also be other water source, water behind road in sucker rod, main forwardtransfer signal worm, lower extension bar three, because the heating of cable (is the cooling of water to cable in fact, the cooling effect of water is far superior to carbon dioxide, can ensure inside and outside cable can not because of overheated impaired), become gas, and, due to the existence of sponge cylinder layer, water can first be adsorbed, then by thermal evaporation, do not exist yet water also fully heating just enter the situation of lower contact to crude oil.Water after these gasifications, the same with carbon dioxide, the effect of heating medium can be played, and due to specific heat of water large, heat capacity is much better than.Heat to such as directly to be taken below screw pump, in sand control screen at the place, the crude oil at sand control screen place can be heated up more, thus more a high proportion of crude oil temperature can be had to exceed pour point, makes it can by smooth lifting.Said process, by medium (gaseous mixture of water vapour or water vapour and carbon dioxide), make that a part of utilization rate in oil pick-up tube is lower even can be described as the heat originally can wasted, be provided to the position (the oil temperature lower part such as sand control screen) more needed, thus effectively improve the oil stream lifting effect of entirety of the present invention, decrease heat waste.And the steam entering below can become liquid state again, after reaching heavy water oil storage cavity, to be separated with crude oil, layering.
Described main oil pipe is provided with tubing centrilizer 29, described tubing centrilizer tip height is consistent with oil well cylinder tip height, heating chamber is provided with in described tubing centrilizer, heater 30 is provided with in described incubation cavity, the heating head 31 of heater stretches in main oil pipe, and described marine riser inwall is provided with insulation layer.Tubing centrilizer belongs to routine techniques, mainly can prevent main oil pipe from offseting excessively.Utilize tubing centrilizer to offer inner space, extra heater is set, then can carry out composite heating.In the position that some are special, carry out middle heating thus make in main oil pipe, not have one section of long crude oil oil temperature being in below pour point, maintain the smooth lifting of oil stream.Oil well cylinder top is a cut-off rule, then is exactly upwards marine riser, and tubing centrilizer should be arranged in oil well cylinder, should not be arranged on marine riser (material and intensity limit).And in main oil pipe, to a certain extent, more upwards, crude oil low viscosity is required higher (single from local crude oil angle, certain part crude oil present position is higher, lifting power consumption, difficulty are larger), so wish that the former oil viscosity of eminence also can not be too high, thus the lifting of oil stream can be allowed smooth, heater then can play the function of reheat, composite heating, maintain the low viscosity of crude oil at interlude, increase the lifting inertia of oil stream, allow the fluid ability of crude oil entirety in main oil pipe become stronger.
Described external insulation jacket comprises multiple insulation sleeve section 32, the inwall of described insulation sleeve section compresses inside conductor, be provided with elasticity between adjacent insulation sleeve section and connect drum 33, be formed in one between described elasticity connection drum with insulation sleeve section structure, has gap between described elasticity connection drum inwall and inside conductor.Cable length is very long, there is km on hundreds of, after heating power, inside conductor has obviously elongated, the inwall of insulation sleeve section compresses inside conductor, driven mobile so can be heated inside conductor elongated, thus more the opening of adjacent insulation sleeve Duan Huifen, elasticity connects drum and is then stretched, elasticity connects gap smaller between drum inwall and inside conductor, makes external insulation be wrapped in the change that can adapt to inside conductor on the whole better.
Claims (10)
1. one kind is fallen glutinous production wells, it is characterized in that, comprise main oil pipe, the hollow sucker rod of upper end open, stretch into the oil well cylinder under the mud line of seabed, described oil well cylinder is provided with the marine riser that has inner chamber, described riser top stretches out sea, be tightly connected between the barrel of oil well cylinder and the tube wall of marine riser, main oil pipe is through the inner chamber of marine riser, main oil pipe lower end is stretched in oil well cylinder, screw pump is provided with in described main oil pipe, the upper end of main forwardtransfer signal worm of described screw pump is connected with the lower end of sucker rod, described screw pump is in the lower end of main oil pipe, described oil well cylinder has perforation shell hole, described perforation shell hole stretches into oil reservoir, in described oil well cylinder, bottom is provided with sand control screen, described sand control screen top has screen casing oil-out, described screen casing oil-out communicates with the oil-in of screw pump, screen casing packer is provided with in described oil well cylinder, described sand control screen is through screen casing packer, be tightly connected between described sand control screen outer wall and screen casing packer, be tightly connected between described screen casing packer and oily shaft in wall, cable is provided with in described sucker rod, described cable one end connects power supply source, the bottom of cable other end connecting with pumping rod, the top of described sucker rod takes back power supply source by electric wire, described cable comprises inside conductor, external insulation jacket, insulate between described sucker rod and the main forwardtransfer signal worm of screw pump, described oil well cylinder offers some anti-depression holes stretched in the mud layer of seabed, anti-depression beam is provided with in described anti-depression hole, concrete is filled with between described anti-depression hole and anti-depression beam, described oily wellbore bottom is provided with at least two default stake bars, the bottom of screen casing packer is withstood in described default stake masthead portion.
2. glutinous production wells falls in one according to claim 1, it is characterized in that, tubing packer is provided with in described oil well cylinder, be tightly connected between described main oil pipe outer wall and tubing packer, be tightly connected between described tubing packer and oily shaft in wall, form heavy water oil storage cavity between the inwall of tubing packer, screen casing packer, oil well cylinder, the bore of described heavy water oil storage cavity is greater than the bore of sand control screen.
3. glutinous production wells falls in one according to claim 2, it is characterized in that, the main forwardtransfer signal worm lower end of described screw pump connects extension bar, be provided with in described heavy water oil storage cavity and prevent directly inhaling lagging, described anti-straight lagging of inhaling is connected on lower extension bar, described anti-straight suction between lagging outer ledge and the chamber wall of heavy water oil storage cavity forms the passage that oils, described lower extension bar is provided with many stirring cross bars, described stirring cross bar one end is fixed on lower extension bar, and described stirring cross bar is in below anti-straight suction lagging.
4. glutinous production wells falls in one according to claim 3, it is characterized in that, described sucker rod lower ending opening, the main forwardtransfer signal worm of described screw pump is upper, the cored screw of lower ending opening, the upper end open of described sucker rod connects a carbon dioxide air feed pump, described carbon dioxide air feed pump connects carbon dioxide air source, be communicated with between described sucker rod with main forwardtransfer signal worm, described lower extension bar is upper, the hollow stem of lower ending opening, described lower extension bar is connected with main forwardtransfer signal worm and is communicated with, described lower extension bar lower end is stretched in sand control screen, described lower extension bar is provided with multiple air intake be in sand control screen, described air intake is provided with into gas one way valve.
5. glutinous production wells falls in one according to claim 4, it is characterized in that, all air intakes vertically arrange in a straight line, be provided with interval in described sand control screen and enter air-casing, described lower extension bar and interval enter to be rotationally connected between air-casing and lower extension bar outer wall and interval enter between air-casing inwall to seal, described interval enters air-casing and is provided with the vertical blowhole of a row, and each blowhole all can correspondingly with one of them air intake be communicated with.
6. glutinous production wells falls in one according to claim 5, it is characterized in that, described lower extension bar is provided with multiple mixed gas port, described mixed gas port is provided with mixed gas one way valve, the mixed air-casing of interval is provided with outside described lower extension bar, be rotationally connected between described lower extension bar and the mixed air-casing of interval and seal between lower extension bar outer wall and the mixed air-casing inwall of interval, described interval is mixed air-casing and is between anti-straight suction lagging and screw pump, described interval is mixed air-casing and is provided with some gas mixed holes, and each gas mixed hole all can correspondingly with one of them mixed gas port be communicated with.
7. glutinous production wells falls in the one according to claim 1 or 2 or 3, it is characterized in that, sponge cylinder layer is provided with between described sucker rod and cable, described sponge cylinder layer is connected on sucker rod inwall, through wires hole is provided with in described sponge cylinder layer, described cable is through through wires hole, and cable and sucker rod separate by described sponge cylinder layer.
8. glutinous production wells falls in one according to claim 7, it is characterized in that, the upper end open of described sucker rod is communicated with the water side of a supply-water pump, and the water inlet end of described supply-water pump connects water source.
9. glutinous production wells falls in the one according to claim 1 or 2 or 3, it is characterized in that, described main oil pipe is provided with tubing centrilizer, described tubing centrilizer tip height is consistent with oil well cylinder tip height, heating chamber is provided with in described tubing centrilizer, be provided with heater in described incubation cavity, the heating head of heater stretches in main oil pipe, and described marine riser inwall is provided with insulation layer.
10. glutinous production wells falls in one according to claim 1, it is characterized in that, described external insulation jacket comprises multiple insulation sleeve section, the inwall of described insulation sleeve section compresses inside conductor, be provided with elasticity between adjacent insulation sleeve section and connect drum, be formed in one between described elasticity connection drum with insulation sleeve section structure, has gap between described elasticity connection drum inwall and inside conductor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510113268.0A CN104818974B (en) | 2015-03-16 | 2015-03-16 | The glutinous production wells of one kind drop |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510113268.0A CN104818974B (en) | 2015-03-16 | 2015-03-16 | The glutinous production wells of one kind drop |
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| Publication Number | Publication Date |
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| CN104818974A true CN104818974A (en) | 2015-08-05 |
| CN104818974B CN104818974B (en) | 2017-12-22 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201908316U (en) * | 2010-11-22 | 2011-07-27 | 广州工程总承包集团有限公司 | Annular cast-in-place concrete sinking well protection wall with plastic mould cavity and steel ribs |
| 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 |
-
2015
- 2015-03-16 CN CN201510113268.0A patent/CN104818974B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201908316U (en) * | 2010-11-22 | 2011-07-27 | 广州工程总承包集团有限公司 | Annular cast-in-place concrete sinking well protection wall with plastic mould cavity and steel ribs |
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| 杜建波等: "刚果深水稠油井井筒电缆加热降黏工艺", 《大庆石油地质与开发》 * |
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| CN104818974B (en) | 2017-12-22 |
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