CN105283630A - A gas lift system and a gas lift method - Google Patents
A gas lift system and a gas lift method Download PDFInfo
- Publication number
- CN105283630A CN105283630A CN201480033546.5A CN201480033546A CN105283630A CN 105283630 A CN105283630 A CN 105283630A CN 201480033546 A CN201480033546 A CN 201480033546A CN 105283630 A CN105283630 A CN 105283630A
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- Prior art keywords
- gas lift
- sleeve pipe
- chamber
- opening
- lift system
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000012530 fluid Substances 0.000 claims abstract description 90
- 238000005086 pumping Methods 0.000 claims abstract description 36
- 238000007789 sealing Methods 0.000 claims abstract description 20
- 238000004891 communication Methods 0.000 claims abstract description 9
- 238000002955 isolation Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 59
- 239000003921 oil Substances 0.000 description 8
- 230000002706 hydrostatic effect Effects 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000011499 joint compound Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/122—Gas lift
- E21B43/123—Gas lift valves
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B29/00—Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/002—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe
Abstract
The present invention relates to a gas lift system (1) arranged in a well (65) having a top (10) and comprising a well fluid (11), the gas lift system comprising a casing (61) arranged in the borehole defining a surrounding annulus (62), an opening (86) in the casing, and a pumping unit (12) for pumping gas (8) into the annulus, wherein the gas lift system further comprises a downhole tool (14) having a first end (15) nearest the top of the well and a second end (16), the downhole tool comprising a pump section (2) comprising a housing (20) comprising a chamber (201) having an axial extension (17), a plunger (23) sliding in the chamber and dividing the chamber into a first compartment (203) and a second compartment (202), a plunger rod (26) connected with the plunger, a chamber inlet channel (27) and a chamber outlet channel (21), the inlet channel and the outlet channel being in fluid communication with the second compartment, a sealing element (29) for isolating a first part (66) of the casing from a second part (67) of the casing, the first part and the inlet channel being in fluid communication with the opening, a one-way valve (24) arranged in the inlet channel to allow fluid to flow into the chamber, and a one-way valve (22) arranged in the outlet channel to allow fluid to flow out of the chamber. The invention also relates to a gas lift method.
Description
Technical field
The present invention relates to a kind of being arranged in and there is well head and the gas lift system comprised in the well of wellbore fluids, this gas lift system comprise opening on the layout sleeve pipe limiting surrounding annular space in the wellbore, sleeve pipe and for by gas pump to the pumping unit in annular space.The invention still further relates to a kind of gas lift method.
Background technology
In well, gaslift fluid column is to overcome hydrostatic pressure and hydrocarbon to be urged to ground normally realizes by means of the side pocket (sidepocket) of the part being arranged to production casing.The annular space formed between production casing and intermediate casing utilizes gas pressurized, and described gas is allowed to flow into through a certain side pocket gas lift valve under a certain pressure.Gas-pressurized annularly can flow downward to certain a bit in space, and last side pocket is usually placed in this some place.At present, cannot gas-pressurized to flow through this point.
Summary of the invention
An object of the present invention is completely or partially to overcome above-mentioned shortcoming and defect of the prior art.More particularly, an object is to provide a kind of gas lift system of improvement, and it can provide gaslift in the position decreaseing beyond the point that the known system with side pocket gas lift valve can reach along well further.
From the following description the above-mentioned purpose become apparent and numerous other object, advantage and features are realized by according to the solution of the present invention, namely have top and the gas lift system comprised in the well of wellbore fluids realizes by being arranged in, this gas lift system comprises:
-layout the sleeve pipe limiting surrounding annular space in the wellbore;
-opening on sleeve pipe; And
-for by gas pump to the pumping unit in annular space,
Wherein, this gas lift system also comprises downhole tool, and this downhole tool has the first end at the second end and the top near well, and this downhole tool comprises pumping section, and this pumping section comprises:
-housing, this housing comprises the chamber with axial bearing of trend;
-plunger, it slides and this chamber is separated into the first compartment and the second compartment in this chamber;
-the plunger rod that is connected with plunger;
-chamber ingress passage and chamber outlet passage, this access road is communicated with this second compartment fluid with this exit passageway;
-potted component for the Part II of the Part I of this sleeve pipe and sleeve pipe is isolated, described Part I and access road and this open fluid communication;
-be arranged in access road to allow fluid to flow into one way valve in this chamber; And
-be arranged in exit passageway with the one way valve allowing fluid to flow out from this chamber.
By being provided with aspirator in sleeve pipe, gas can decline further along well, and therefore, and this system can fluid more more than lifting in known systems.Therefore, can provide can not the gaslift of well of gaslift to known system for native system.
In addition, this downhole system also can be dipped into be reduced in the pressure in these wells in deep well, thus can not form hydrate in wellhead assembly or preventer.Hydrate can be formed when having low temperature and high pressure and a certain amount of water in wellbore fluids.
Further, can radially from the external surface of housing towards chamber the extending at least partially of access road.
In addition, this plunger can comprise the projection stretched out towards the first plunger end face of access road and/or exit passageway from plunger.
This projection can be arranged to extend out from the end face of second end near instrument of chamber.
In addition, sealing element can be the lip ring for adjacent openings sealing.
In addition, one way valve can be arranged in the opening, flow in this sleeve pipe to allow fluid.
Sealing element also can circumferentially also can be suitable for against this bobbin seal along housing.
Also can comprise the second potted component according to gas lift system of the present invention, its along housing circumferentially and be suitable for against this bobbin seal, thus the part facing to opening of the Part I of disrance sleeve.
In addition, the entrance of position inlet porting passage that can be substantially just right with opening on bearing of trend vertically.
In addition, this access road entrance can with opening substantially just over the ground along housing circumferentially.
Further, the comparable access road of the outlet of this exit passageway is arranged closer to the first end of this instrument.
In addition, the outlet of this exit passageway this entrance comparable is arranged closer to the first end of this instrument.
Gas lift system according to any one of the present invention also can comprise linear actuators, for providing the reciprocating motion of plunger.
Above-mentioned linear actuators can comprise:
-comprise the tubulose stroke cylinder of one or more piston shell;
-be slidably disposed in this piston shell piston shell to be separated into one or more piston elements of the first chamber and the second chamber;
-stroke axostylus axostyle, it is operably connected to the piston element for being connected with plunger rod, to provide the reciprocating motion of this plunger;
-pump, for the hydraulic fluid be under pressure being alternately supplied to the first chamber and second chamber of plunger housing, moves back and forth in this piston shell to make this piston element; And
-for driving the electro-motor of this pump.
In addition, sealing element can be labyrinth.
Further, the first end of this instrument can be connected with logging cable.
In addition, this opening can comprise the one way valve of two arranged in succession.
This sleeve pipe also can comprise along the isolated multiple opening of sleeve pipe.
In addition, sealing element can be expandable or extensible.
This instrument can comprise the driver element for advancing this instrument to move ahead in well.
In addition, this instrument can comprise tool part, and this tool part comprises the drill bit for being drilled with or milling out opening on sleeve pipe.
Further, this sleeve pipe can comprise at least one side pocket, and described side pocket this opening comparable is closer to described top layout.
This sleeve pipe can have basic vertical portion and basic horizontal part and the heel being connected this vertical portion and horizontal component, and this opening can be arranged in this heel or this horizontal component.
Second end of this instrument of Kong Kecong extends to the equalizing valve be arranged in exit passageway, to be connected with a part for exit passageway in this hole.
The invention still further relates to a kind of gas lift method, the method comprises the following steps:
-will insert in well according to gas lift system in any one of the preceding claims wherein;
-facing to this opening inlet porting passage;
-isolate by the Part II of potted component by the Part I of this sleeve pipe and this sleeve pipe, to make this Part I and this open fluid communication and this access road and this open fluid communication;
-activate this pumping unit with by gas pump in this annular space;
-this plunger rod is moved back and forth; And
-from the Part I pumping fluid of this sleeve pipe, be drawn in this Part I towards this opening a stepping of going forward side by side to make the gas in the fluid in annular space and enter in this first compartment and to discharge through this exit passageway.
Above-mentioned gas lift method also can comprise the isolation of the part facing to opening of the Part I of sleeve pipe to form the step of suction areas between sleeve pipe and the instrument facing to opening.
The method also can be included in step sleeve pipe being offered opening.
Further, this gas lift method also can be included in step sleeve pipe being drilled with opening.
Further, the method can comprise the step discharging this instrument from sleeve pipe.
In addition, the method can be included in step sleeve pipe being offered the second opening.
In addition, the method can comprise and makes this instrument move to along the direction away from the top of well relative with the second opening further and engage the step of this sleeve pipe by potted component.
Finally, the method can comprise the step sucking fluid through this second opening.
Accompanying drawing explanation
Describe the present invention and many advantages thereof in more detail below with reference to accompanying schematic diagram, described schematic diagram illustrate only some nonrestrictive embodiments for illustrative purposes, wherein:
Fig. 1 shows the stereogram of the gas lift system in well;
Fig. 2 shows the sectional view of a part for instrument;
Fig. 3 shows the sectional view of a part for another instrument;
Fig. 4 shows the sectional view of a part for linear actuators;
Fig. 5 shows the sectional view of a part for another linear actuators;
Fig. 6 shows the phantom of another instrument;
Fig. 7 shows the stereogram of another gas lift system in well;
Fig. 8 shows the phantom of a part for gas lift system; And
Fig. 9 shows another gas lift system be arranged in well.
All accompanying drawings are high-level schematic, may not draw in proportion, and they illustrate only and illustrate those parts essential to the invention, omit or have only implied other parts.
Detailed description of the invention
Fig. 1 shows gas lift system 1, and it is arranged in well 65, for providing the gaslift of wellbore fluids, to overcome hydrostatic pressure and by hydrocarbon-containifluids fluids as oil is urged to the ground at top 10 place at well.This gas lift system comprises and is arranged in sleeve pipe 61 in well, that limit surrounding annular space 62 and comprises pumping unit 12, and this pumping unit is arranged in top such as near wellhead assembly or preventer, is pumped in annular space for by gas 8.This gas lift system also comprises downhole tool 14, this downhole tool have near the top of well first end 15 and be arranged in sleeve pipe 61 opening 86 near the second end 16.This downhole tool comprises housing 20, and pumping section 2 is arranged in this housing.This pumping section comprises chamber 201, and this chamber has axial bearing of trend 17.This instrument also comprises plunger 23, and it slides and this chamber is separated into the first compartment 203 and the second compartment 202 in chamber.This plunger is connected with plunger rod 26 and moves back and forth with via opening 86 pumping fluid.This chamber has chamber ingress passage 27 and chamber outlet passage 21, and this access road and exit passageway are all communicated with the second compartment fluid.Be furnished with potted component 29 the Part I 66 of sleeve pipe and the Part II 67 of sleeve pipe to be isolated, this Part I is communicated with opening 86 fluid of sleeve pipe with access road, for the fluid making gas enter from annular space in sleeve pipe.
When using shown in Fig. 1, wherein in the downhole tool form with pumping section aspirator 14 to be arranged in the gas lift system in sleeve pipe, gas can make gas enter than down-hole darker in known system via side pocket by means of only employing gaslift, and therefore, this system can provide than the gaslift in known systems more under deep-well, and therefore can the more fluid of lifting, to make this well can again from producing.Therefore, native system can gaslift known system can not the well of gaslift, again to produce.
In addition, downhole system can also be dipped in deep well, to be reduced in the pressure in these wells, thus can not form hydrate in wellhead assembly or preventer.Hydrate can be formed when having low temperature and high pressure and a certain amount of water in wellbore fluids.
As shown in FIG. 2, in access road 27, be furnished with one way valve 24 flow in this chamber to allow fluid, and in exit passageway, be furnished with one way valve 22 flow out from chamber to allow fluid.Therefore, by making plunger reciprocates, fluids through inlet ports passage sucks and discharges through exit passageway.By this way, the gaslift that wellbore fluids is provided in this sleeve pipe is provided in, to overcome hydrostatic pressure and hydrocarbon is urged to ground in the Part I being inhaled into this sleeve pipe containing the fluid of gas in annular space.
Due to the fact that, namely in known pumping system, gas only can be pumped to any fact of downward certain in annularly space, and gaslift only can be provided to this point, and this causes this well again not produce in some wells.By facing to the opening insertion tool than this point more deep-well depths, this instrument is by just decreaseing beyond this point to opening further by the fluid containing gas of helping in fluid intake chamber in annular space.Therefore, it is possible to provide gaslift further exceeding this place, be needs when this can not overcome hydrostatic pressure at known gas lift system and through side pocket gas-lift working barrel, hydrocarbon is urged to ground.In addition, by being inserted in sleeve pipe facing to opening by instrument, just no longer need side pocket gas-lift working barrel to provide gaslift.When sleeve pipe being provided with side pocket, the platform at sea bed place or ground have to be made into fully larger, because sleeve pipe enlarges markedly at the diameter of section at side pocket place.The cost manufacturing the platform of such band side pocket significantly increases than the cost of the sleeve pipe not with side pocket.Therefore, this gas lift system also causes well no longer to need to make to have side pocket at first, and therefore, the cost relevant to completed well is significantly reduced.
As shown in FIG. 2, this access road is radial from the external surface 36 of housing towards chamber extends.This access road can have radial extension and axial continuation, thus fluid radial direction enters and allows it axially to enter the outlet be arranged on the end face of chamber of access road afterwards.This plunger comprises annular projection 232, and it stretches out from the first plunger end face 231 towards access road and/or exit passageway of plunger.This projection can have the shape of cross section of any type and can be arranged to extend from the end face 204 of second end near instrument of chamber.This projection ensure that the certain minimal distance between plunger end face and the end face of pump chambers, thus stops plunger to block the outlet be arranged on pump case sidewall.In addition, filter element 88 can be set, before entering this chamber or entrance at such wellbore fluids, filter wellbore fluids.In order to example object, this filter element 88 is shown as entrance 52 place being arranged in access road 27.
Pumping section shown in Fig. 3 and Fig. 7 also comprises the second potted component 35, its along housing circumferentially and be suitable for sealing this sleeve pipe, thus the part facing to opening of the Part I of disrance sleeve.Therefore, potted component 29,35 is arranged around housing at the two opposite sides of entrance 52.Described potted component is formed between instrument and sleeve pipe and provides sealing, thus portion's section 87 of closed casing as shown in Figures 6 and 7.Therefore, the fluid containing gas from annular space sucks through the chamber of instrument and discharges through the outlet 53 closer to the first end 15 of instrument, as shown in FIG. 1.
As shown in FIG. 1, this instrument 14 also comprises linear actuators 40, and itself and housing 20 are arranged relatively.As shown in FIG. 4, this linear actuators 40 comprises the tubulose stroke cylinder 4 that limits piston shell 47 and is slidably disposed in this piston shell piston shell to be separated into the piston element 46 of the first chamber 41 and the second chamber 42.The stroke axostylus axostyle 45 extended from piston element is operably connected the reciprocating motion providing plunger in chamber with the plunger rod of this pumping section.Linear actuators also comprises pump 5 (shown in Figure 1), for the hydraulic fluid be under pressure being alternately supplied to the first chamber 41 and the second chamber 42 of tubulose stroke cylinder, and be provided with the electro-motor 6 (shown in Figure 1) for driving pump.When fluid is alternately supplied in the first chamber 41 and the second chamber 42, piston element moves back and forth in tubulose stroke cylinder, thus forms linear movement.Linear movement is passed to plunger rod 26 (illustrating in figs 2 and 3) by stroke axostylus axostyle, thus plunger moves back and forth in chamber, to produce pumping effect or suction effect.
See the embodiment of pumping section 2 shown in fig. 2, when plunger reciprocates, wellbore fluids with gas is inhaled into pump chambers 201 via the access road 27 being positioned at chamber lower portion, is forced through one way valve 24, and through still discharging at the exit passageway 21 of chamber lower portion.More particularly, in upstroke motion process, this plunger motion, away from this access road 27 and one way valve 24, causes the wellbore fluids facing to opening to be inhaled into through access road 27, enters the second compartment 202 of chamber through the one way valve 24 opened.One way valve in access road 27 is the flap valve only allowing fluid inflow chamber indoor, and the one way valve in exit passageway is closed, because fluid only allows to flow out from the one way valve exit passageway 21.Therefore, when plunger 23 arrives upper limit position, the second compartment 202 of chamber has been filled and this first compartment is almost empty.Fluid in the first compartment 203 is forced to extrude through the hole 18 be positioned in chamber sidewall 19 and allows outflow to enter sleeve pipe.That the wherein plunger of plunger moves towards access road 27 and one way valve 24, subsequently downward stroke motion forces fluid flow out through Outlet check valves 24 and therefore enter in sleeve pipe, because inlet one-way valve is closed.In the embodiment shown, the first valve and the second valve are specially ball check valve and comprise the moveable valve ball 221,241 with valve seat 222,242 cooperating, to control flow direction.But, one skilled in the art will know that, can expect that the valve of other types many is to provide similar function.Further, the design of this pumping section is the principle of the insert pump based on extensive use, and therefore technician can expect other design of pumping section in the case of without departing from the present invention.
The design details of linear actuators has been shown in Figure 4 and 5, and Figure 4 and 5 show the different embodiments of linear actuators.In these two embodiments, stroke axostylus axostyle 45 extends past tubulose stroke cylinder 4, and this tubulose stroke cylinder is divided into one or more piston shell 47 by escapement 48.Escapement comprises sealing mechanism 49b, as O-ring seals, is tightly connected to provide between escapement and stroke axostylus axostyle 45.In each piston shell 47, stroke axostylus axostyle 45 is provided with piston element 46, can comes and goes in tubulose stroke cylinder 4 to make stroke axostylus axostyle 45 and run to provide linear movement.Each piston shell in described one or more piston shell is separated into the first chamber 41 and the second chamber 42 by each piston element 46, and piston element is provided with sealing mechanism 49a, be tightly connected to provide between the inner side of piston shell 47 and the outside of piston element 46.As shown in FIG. 4, fluid is alternately supplied to the first chamber 41 and the second chamber 42 by respective fluid passage 43,44.In the embodiment shown in fig. 5, illustrate only the fluid passage be communicated with first piston shell fluid.But other piston shell is also provided with similar fluid passage configuration.In order to provide the linear movement of linear actuators, fluid is pumped in the first chamber by the fluid sucking respective amount from the second chamber 42 by the pump of linear actuators, or conversely.When the first chamber 41 is substantially filled full, pump changes its pumping direction and is pumped in the second chamber 42 from the first chamber 41 by fluid.Therefore, piston element 46 is urged along contrary direction.And therefore reciprocally urge this stroke axostylus axostyle 45, thus linear movement is provided.As can be seen in the diagram, the first chamber 41 is provided with fluid passage 43 in one end of piston shell 47, and this second chamber 42 is provided with fluid passage 44 in the end opposite of piston shell 47.By this way, fluid can be sucked or pump in each chamber, until piston element 46 is almost close to escapement 48.Therefore, linear actuators is closed system, this means identical fluid by piston shell 47 reciprocally pumping be recycled, move back and forth to make described one or more piston element 46.
As shown in FIG. 7, in another embodiment, linear actuators can comprise the linear electric motor 51 driving stroke axostylus axostyle.In addition, be furnished with one way valve 25 in the opening, flow in sleeve pipe to allow fluid but stop fluid to flow into annular space from sleeve pipe.Opening 86 also can be provided with the one way valve of two arranged in succession, to provide safer scheme.
In order to increase the amount of the gas in scution bush, as shown in FIG. 7, substantially just right with opening on bearing of trend vertically position is provided with the entrance 52 of access road.Therefore, entrance and the opening of access road are arranged substantially just over the ground, also along housing circumferentially.Instrument can comprise multiple entrance, to guarantee that the orientation of instrument is unessential.
As shown in FIG. 1, exit passageway has outlet 53, and it is arranged than first end 15 ground of access road 27 closer to instrument.In FIG, outlet 53 is arranged on the sidewall of hydraulic cylinder in the position of being much higher than chamber, and in the figure 7, this outlet is arranged in the connector 59 on the first end 15 of instrument.
In fig. 8, sealing element is lip ring for adjacent openings sealing and sealing element has the cup seal shape of adjacent openings 86.
In figs 2 and 3, potted component is labyrinth sealing, and in figs. 1 and 7, potted component is expandable or extendible seal, and it is made up of elastic body or metal usually.
As seen in figs. 1 and 7, the instrument of this gas lift system is wireline tool, and wherein, the first end of instrument is connected with logging cable 60.
As shown in FIG. 9, this sleeve pipe comprises along sleeve pipe isolated multiple opening 86a, 86b, 86c.First, arrange this instrument facing to this first opening 86a, only expand below opening to make potted component.Over time, when the fluid containing gas enters a period of time through the first opening, instrument and potted component contract flat and instrument drops to relative with the second opening 86b further along well, sealing element only expands below the second opening herein, and sucks through the second opening containing the fluid of gas.After a period of time, instrument declines further along well and potted component is expanded, to make the entrance of instrument arrange facing to the 3rd opening 86c, as shown in FIG. 9.This instrument can comprise the drill bit for offering opening.
As can in the figure 7 shown in, this instrument comprises driver element 9, moves ahead in well for driving tool.This driver element is driven by pump 5a, and this pump 5a is driven by motor 6.
In fig .9, the sleeve pipe of gas lift system comprises three side pockets 54, and described side pocket than opening closer to top layout.The position 90 that gas can be introduced by side pocket is in the bottom of side pocket.Sleeve pipe has basic vertical portion 91 and basic horizontal part 92 and the heel 93 being connected this vertical portion and horizontal component, and this aperture arrangement is in heel or this horizontal component.
In figure 3, hole extends to the equalizing valve 37 be arranged in exit passageway 21, to be connected with a part for exit passageway in this hole from the second end 16 of instrument.When this equalizing valve is suitable for being arranged in well at potted component 29 and being pumped in the Part I above potted component 29 of sleeve pipe containing the fluid of gas, balance the pressure reduction formed across potted component 29.In order to monitor and measure the pressure reduction across potted component 29, the other parts of sealing element 29 or instrument can comprise the system for measuring pressure reduction, as the one or more sensors 39 for measuring the pressure in the bottom and top of well.But pressure reduction also can be determined based on other principle known to the skilled, especially determine based on the power driven needed for pumping section center pillar plug.When gas lift system lifting fluid a period of time time, well can be from producing to a certain extent, make the pressure of the pressure ratio in the second sleeve portion in first set tube portion higher, and therefore allow the fluid from Part II through equalizing valve and flow out through outlet, this contributes to the hydrostatic pressure of the fluid overcome at overthe openings.
In figure 6, spacing shoulder 95 is arranged in instrument, and the groove 96 on this spacing shoulder and sleeve pipe 61 interacts, to locate the position of this instrument and to guarantee that pumping section 2 is located in tram.The part comprising groove 96 of sleeve pipe can be landing nipple known to the skilled.As shown in FIG. 6, two potted components 29 are located in the two opposite sides of opening 86.At this, each potted component 29 provides sealing in the annular space between pump and sleeve pipe, with portion's section 87 of closed casing.
Further, as mentioned above, the design of this pumping section allows wellbore fluids to flow from entrance 52 towards outlet 53, and no matter the position of plunger 23 at which.Therefore, instrument 14 can permanently or the long term be placed on down-hole, operate based on advancing the actual demand of flowing in well.If for some reason, the flowing in well stops suddenly, can activate this instrument to advance flowing again can till self-operating until well.This instrument can based on pressure automatic activation in measured well or the signal activation that can be accepted from operator by logging cable.Therefore the measured pressure reduction across this group potted component can be used to by the operation activating pumping section continuously and make pumping section lose efficacy to carry out the pumping section of control tool by providing gaslift to promote flowing in well.
Therefore the instrument 14 of gas lift system 1 is lowered by and is also so arranged so that access road 27 is facing to this opening to sleeve pipe, then by means of potted component 29, the Part I 66 of sleeve pipe and the Part II 67 of sleeve pipe are isolated, to make described Part I and access road and open fluid communication.Subsequently, activate pumping unit to pump in annular space by gas, and plunger rod is moved back and forth, with the Part I pumping fluid from sleeve pipe, make the gas in annular space in fluid be drawn into a Part I stepping of going forward side by side towards opening and enter the first compartment and discharge through exit passageway.
When being provided with two potted components 29,35, the part faced toward with opening of the Part I of sleeve pipe can be isolated, to form suction areas between sleeve pipe and the instrument facing to opening.This instrument also can comprise the mechanism for offering opening on sleeve pipe in down-hole.
When starting flowing be not enough to the pressure effect existed in reservoir for wellbore fluids in the gaslift provided via the first opening under, instrument by making potted component shrink or retracting from sleeve pipe self release, and moves down further along well subsequently and on sleeve pipe, offers the second opening and start suction action facing to the second opening and providing gaslift from the first opening along the further down position of well.When the gaslift provided through the second opening is not enough, repeat potted component was lost efficacy and offers the process of opening in the position declined further along well.Therefore, this instrument can comprise tool part 94, and this tool part comprises drill bit 97, for providing such opening on sleeve pipe, as shown in FIG. 9.
This linear actuators can be stroke instrument, or stroke instrument is to provide the instrument of axial force.Stroke instrument comprises the electro-motor for driving pump.This pump pumps fluid in piston shell to make piston action in piston shell.This piston is arranged on stroke axostylus axostyle.This pump can pump fluid into the side of piston shell also simultaneously by the opposite side sucking-off of fluid from piston.
Fluid or wellbore fluids refer to the fluid of any type being present in oil well or gas well down-hole, as natural gas, oil, oil-base mud, crude oil, water etc.Gas refers to the gas component of any type be present in well, completion or open hole, and oil refers to the oil ingredient of any type, and such as crude oil, containing flow of oil etc.Therefore gas, oil and aqueous fluid can comprise other element except gas, oil and/or water or material respectively.
What sleeve pipe referred to that down-hole uses produces the pipe, pipeline, tubular structure, bushing pipe, tubing string etc. of relevant any type with oil or natural gas.
When this instrument be not be submerged in sleeve pipe completely, downhole tractor can be used to promote described instrument and enters position in well completely.What downhole tractor can have a provided with wheels can the arm of projection, and wherein, the inner surface of wheel contacts sleeve pipe, advances for advancing this tractor and instrument in sleeve pipe.Downhole tractor is the driven tool that can promote or pull any type of instrument in down-hole, such as
Although in conjunction with the preferred embodiments of the present invention, invention has been described above, do not deviate from as claim below the some modification that can expect in the situation of the present invention that limits apparent to those skilled in the art.
Claims (16)
1. one kind is arranged in and has top (10) and the gas lift system (1) comprised in the well (65) of wellbore fluids (11), and this gas lift system comprises:
-arrange the sleeve pipe (61) limiting surrounding annular space (62) in the wellbore;
-opening (86) on sleeve pipe; And
-for gas (8) being pumped to the pumping unit (12) in this annular space,
Wherein, this gas lift system also comprises downhole tool (14), and this downhole tool has the first end (15) at the top near well, and the second end (16), and this downhole tool comprises pumping section (2), and this pumping section comprises:
-housing (20), this housing comprises the chamber (201) with axial bearing of trend (17);
-plunger (23), it slides and this chamber is separated into the first compartment (203) and the second compartment (202) in this chamber;
-the plunger rod (26) that is connected with this plunger;
-chamber ingress passage (27) and chamber outlet passage (21), this access road is communicated with this second compartment fluid with this exit passageway;
-potted component (29) for the Part I (66) of this sleeve pipe and the Part II (67) of this sleeve pipe are isolated, this Part I and this access road and described open fluid communication;
-be arranged in this access road to allow fluid to flow into one way valve (24) in this chamber; And
-be arranged in this exit passageway with the one way valve allowing fluid to flow out from this chamber (22).
2. gas lift system according to claim 1, wherein, extending from the external surface (36) of this housing towards described chamber radial direction at least partially of described access road.
3. according to gas lift system in any one of the preceding claims wherein, wherein, this plunger comprises the projection (232) stretched out towards the first plunger end face (231) of access road and/or exit passageway from described plunger.
4. according to gas lift system in any one of the preceding claims wherein, wherein, sealing element is the lip ring for contiguous described opening sealing.
5. according to gas lift system in any one of the preceding claims wherein, wherein, be furnished with one way valve (25) in said opening, flow in this sleeve pipe to allow fluid.
6. according to gas lift system in any one of the preceding claims wherein, wherein, sealing element along described housing circumferentially and be suitable for against this bobbin seal.
7. according to gas lift system in any one of the preceding claims wherein, also comprise the second potted component (35), its along housing circumferentially and be suitable for against this bobbin seal, thus isolate the Part I of described sleeve pipe facing to the part of described opening.
8. according to gas lift system in any one of the preceding claims wherein, wherein, to be arranged to bearing of trend and opening vertically substantially relative for the entrance (52) of described access road.
9. according to gas lift system in any one of the preceding claims wherein, wherein, the outlet (53) of described exit passageway is arranged to than the first end of this access road closer to this instrument.
10. according to gas lift system in any one of the preceding claims wherein, also comprise linear actuators (40), for providing the reciprocating motion of plunger.
11. according to gas lift system in any one of the preceding claims wherein, and wherein, this instrument comprises the driver element (9) for advancing this instrument to move ahead in well.
12. according to gas lift system in any one of the preceding claims wherein, and wherein, this instrument comprises tool part (94), and this tool part comprises the drill bit (97) for getting out or mill out opening on sleeve pipe.
13. according to gas lift system in any one of the preceding claims wherein, and wherein, this sleeve pipe comprises at least one side pocket (54), and described side pocket is arranged to than this opening closer to described top.
14. 1 kinds of gas lift method, the method comprises the following steps:
-will insert in well according to gas lift system in any one of the preceding claims wherein;
-described access road is arranged facing to this opening;
-by potted component (29), the Part I (66) of this sleeve pipe and the Part II (67) of this sleeve pipe are isolated, to make this Part I and this open fluid communication and this access road and this open fluid communication;
-activate this pumping unit with by gas pump in this annular space;
-this plunger rod mobile makes it to move back and forth; And
-from the Part I pumping fluid of this sleeve pipe, make the gas in the fluid in annular space be drawn in this Part I towards this opening a stepping of going forward side by side and to enter in this first compartment and to discharge through this exit passageway.
15. gas lift method according to claim 14, also comprise the isolation of the part facing to opening of the Part I of described sleeve pipe to form the step of suction areas between described sleeve pipe and the instrument facing to this opening.
16. gas lift method according to claim 14, are also included in step sleeve pipe being drilled with opening.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP13173704.1A EP2818630A1 (en) | 2013-06-26 | 2013-06-26 | A gas lift system and a gas lift method |
| EP13173704.1 | 2013-06-26 | ||
| PCT/EP2014/063362 WO2014207025A2 (en) | 2013-06-26 | 2014-06-25 | A gas lift system and a gas lift method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105283630A true CN105283630A (en) | 2016-01-27 |
Family
ID=48740881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480033546.5A Pending CN105283630A (en) | 2013-06-26 | 2014-06-25 | A gas lift system and a gas lift method |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US20160153268A1 (en) |
| EP (2) | EP2818630A1 (en) |
| CN (1) | CN105283630A (en) |
| AU (1) | AU2014301129B2 (en) |
| BR (1) | BR112015029935A2 (en) |
| CA (1) | CA2915322A1 (en) |
| MX (1) | MX2015016972A (en) |
| RU (1) | RU2016100240A (en) |
| WO (1) | WO2014207025A2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108240216A (en) * | 2016-12-27 | 2018-07-03 | 中国石油天然气股份有限公司 | A kind of gas-lift production plunger run time test device and method |
| CN111535783A (en) * | 2020-04-17 | 2020-08-14 | 四川轻化工大学 | Negative pressure suction and gas lift combined action pump for double-layer pipe |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9982498B1 (en) * | 2015-03-02 | 2018-05-29 | Glenn Shick, Jr. | Fluid removal device and method |
| US10385663B2 (en) | 2016-10-21 | 2019-08-20 | Weatherford Technology Holdings, Llc | Subsurface pump for use in well artificial lift operations having an interior flow passage of a plunger being in communication with a fluid chamber via a filter |
| CN106592692A (en) * | 2016-10-31 | 2017-04-26 | 北京建工环境修复股份有限公司 | Underground fluid gas extraction device and process |
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|---|---|---|---|---|
| US5860795A (en) * | 1996-03-22 | 1999-01-19 | Alberta Research Council | Method for underground-reservoir fluids production with pump drive contained within the wellbore |
| WO2001020126A2 (en) * | 1999-09-15 | 2001-03-22 | Shell Internationale Research Maatschappij B.V. | System for enhancing fluid flow in a well |
| CN1648406A (en) * | 2004-12-22 | 2005-08-03 | 西南石油学院 | Ground injecting gas boosting oil production and liquid discharging gas producing device and method |
| EP2110509A2 (en) * | 2008-04-10 | 2009-10-21 | Bj Services Company | System and method for thru tubing deepening of gas lift |
| US20110278015A1 (en) * | 2007-12-10 | 2011-11-17 | Evolution Petroleum Corporation | System and method for production of reservoir fluids |
| EP2574721A1 (en) * | 2011-09-30 | 2013-04-03 | Welltec A/S | A punching tool |
-
2013
- 2013-06-26 EP EP13173704.1A patent/EP2818630A1/en not_active Withdrawn
-
2014
- 2014-06-25 AU AU2014301129A patent/AU2014301129B2/en not_active Expired - Fee Related
- 2014-06-25 CN CN201480033546.5A patent/CN105283630A/en active Pending
- 2014-06-25 RU RU2016100240A patent/RU2016100240A/en not_active Application Discontinuation
- 2014-06-25 BR BR112015029935A patent/BR112015029935A2/en not_active IP Right Cessation
- 2014-06-25 CA CA2915322A patent/CA2915322A1/en not_active Abandoned
- 2014-06-25 WO PCT/EP2014/063362 patent/WO2014207025A2/en active Application Filing
- 2014-06-25 MX MX2015016972A patent/MX2015016972A/en unknown
- 2014-06-25 EP EP14732236.6A patent/EP3014056A2/en not_active Withdrawn
- 2014-06-25 US US14/899,282 patent/US20160153268A1/en not_active Abandoned
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5860795A (en) * | 1996-03-22 | 1999-01-19 | Alberta Research Council | Method for underground-reservoir fluids production with pump drive contained within the wellbore |
| WO2001020126A2 (en) * | 1999-09-15 | 2001-03-22 | Shell Internationale Research Maatschappij B.V. | System for enhancing fluid flow in a well |
| CN1648406A (en) * | 2004-12-22 | 2005-08-03 | 西南石油学院 | Ground injecting gas boosting oil production and liquid discharging gas producing device and method |
| US20110278015A1 (en) * | 2007-12-10 | 2011-11-17 | Evolution Petroleum Corporation | System and method for production of reservoir fluids |
| EP2110509A2 (en) * | 2008-04-10 | 2009-10-21 | Bj Services Company | System and method for thru tubing deepening of gas lift |
| EP2574721A1 (en) * | 2011-09-30 | 2013-04-03 | Welltec A/S | A punching tool |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108240216A (en) * | 2016-12-27 | 2018-07-03 | 中国石油天然气股份有限公司 | A kind of gas-lift production plunger run time test device and method |
| CN111535783A (en) * | 2020-04-17 | 2020-08-14 | 四川轻化工大学 | Negative pressure suction and gas lift combined action pump for double-layer pipe |
| CN111535783B (en) * | 2020-04-17 | 2022-03-08 | 四川轻化工大学 | Negative pressure suction and gas lift combined action pump for double-layer pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| RU2016100240A (en) | 2017-07-31 |
| MX2015016972A (en) | 2016-04-25 |
| EP2818630A1 (en) | 2014-12-31 |
| EP3014056A2 (en) | 2016-05-04 |
| AU2014301129A1 (en) | 2016-02-04 |
| BR112015029935A2 (en) | 2017-07-25 |
| WO2014207025A2 (en) | 2014-12-31 |
| US20160153268A1 (en) | 2016-06-02 |
| WO2014207025A3 (en) | 2015-06-18 |
| CA2915322A1 (en) | 2014-12-31 |
| AU2014301129B2 (en) | 2017-04-13 |
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Application publication date: 20160127 |