CN208830969U - Oil recovery and water injection string - Google Patents
Oil recovery and water injection string Download PDFInfo
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- CN208830969U CN208830969U CN201821147548.9U CN201821147548U CN208830969U CN 208830969 U CN208830969 U CN 208830969U CN 201821147548 U CN201821147548 U CN 201821147548U CN 208830969 U CN208830969 U CN 208830969U
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- water injection
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- packer
- oil recovery
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Abstract
The utility model provides a kind of oil recovery and water injection string.It recovers the oil and water injection string includes the production pipe, water injection string and casing set gradually from inside to outside；Water injection pipe is sequentially installed with water injection valve, the first packer and seal assembly from the top down；Water injection valve is equipped with the waterflood path being connected to the first ring cavity；Second ring cavity is separated into close to the water filling space of well head and close to the oil recovery space in shaft bottom by the first packer；Seal assembly seals the lower end of the first ring cavity, and seal assembly is equipped with the oil channel being connected to production pipe；Oil channel is connected to oil recovery space, and water injection valve controls waterflood path and is connected to water filling space；Casing is equipped with the first perforation tunnel and the second perforation tunnel being connected to respectively with water filling space and oil recovery space.Tubing string provided by the utility model can both be filled the water, and can also be recovered the oil, and be conducive to improve oil well utilization efficiency, reduced production cost.
Description
Technical field
The utility model relates to technical field of petroleum extraction more particularly to a kind of oil recovery and water injection strings.
Background technique
With the continuous exploitation of oil well, stratum energy is gradually decreased, and oil well stop-spraying is caused even to stop production.In order to improve oil well
Recovery ratio, stratum energy generallys use water filling mode after reducing maintains or even increasees strata pressure, and utilizes pumping unit
Produce the crude oil of underground.
In the prior art, it is only capable of tripping in water injection string into a bite oil well and carries out water filling or the progress of tripping in flow string
It recovers the oil, oil well utilization efficiency is lower for the oil reservoir containing multiple straticulate explorations.
For the oil reservoir containing multiple straticulate explorations, tripping in water injection string and flow string are filled the water and are recovered the oil respectively, only
It is able to achieve single water filling or oil recovery, production efficiency is low.
Utility model content
The utility model provides a kind of oil recovery and water injection string, to solve the oil reservoir that existing exploitation contains multiple straticulate explorations
When respectively tripping in water injection string and flow string filled the water and recovered the oil, be only able to achieve single water filling or oil recovery, production efficiency
Low technical problem.
The utility model provides a kind of oil recovery and water injection string comprising the production pipe that sets gradually from inside to outside, water filling
Tubing string and casing, the gap between the production pipe and the water injection string form the first ring cavity；The water injection string and institute
The gap stated between casing forms the second ring cavity；The water injection string includes water injection pipe, water injection valve, the first packer and sealing
Assembly, the water injection pipe are sequentially installed with the water injection valve, first packer and the seal assembly from the top down；Institute
It states water injection valve and is equipped with the waterflood path being connected to first ring cavity；Second ring cavity is separated into close to well by first packer
The oil recovery space in the water filling space of mouth and close shaft bottom；The seal assembly seals the lower end of first ring cavity, and described
Seal assembly is equipped with the oil channel being connected to the production pipe；The oil channel is connected to the oil recovery space, the note
Water valve controls the waterflood path and is connected to the water filling space；Described sleeve pipe be equipped with respectively with the water filling space and described adopt
The first perforation tunnel and the second perforation tunnel of oily space connection.
Oil recovery as described above and water injection string, wherein the water injection valve includes the first connector, central tube and sliding sleeve；
The upper end of first connector is fixedly connected with the water injection pipe, and first connector is equipped with the be connected to the water injection pipe
One channel；The lower end of first connector is set in the outside of the central tube, and is fixedly connected with the central tube, it is described in
Heart pipe is connected to the first passage；The central tube is equipped with water injection hole close to one end of first connector；The sliding sleeve set
Be located at the outside of the water injection hole of first connector and the central tube, and the upper end of the sliding sleeve by the first pin with it is described
The lower end of first connector is fixedly connected；Concave shape is faced out on the inside of the sliding sleeve into step surface, the step surface and described
The lower end surface of one connector forms impact space, and the impact space is connected to the water injection hole；Preset pressure fluid passes through institute
Water injection hole is stated into the impact space, cuts first pin so that the sliding sleeve axially downwardly sliding along the central tube
It is dynamic, it is connected to the water injection hole with the water filling space；The waterflood path include the first passage, the central tube and
The water injection hole.
Oil recovery as described above and water injection string, wherein the first sealing is provided between the sliding sleeve and the central tube
Circle；The second sealing ring is provided between the sliding sleeve and first connector, and second sealing ring is located at first pin
The lower section of nail.
Oil recovery as described above and water injection string, wherein the seal assembly includes that top connection, lower contact and sealing are inserted
Pipe, the top connection are fixedly connected with the water injection pipe and the lower contact respectively；The top connection is equipped with and the water injection pipe
The upper channel of connection, the lower contact are equipped with the lower channel being connected to the upper channel；The upper channel and the lower channel connect
It meets place and is equipped with seal assembly；The upper end of the sealing intubation is fixedly connected with the production pipe, and is equipped in sealing intubation
The oil channel；The lower end of the sealing intubation is connect with the seal assembly interference, and the lower end of first ring cavity is close
Envelope.
Oil recovery as described above and water injection string, wherein the seal assembly includes connector sleeve and packing_seal circle；Institute
Connector sleeve is stated to be connected in the clamping space that the top connection and the lower contact are formed；The packing_seal circle is arranged described
The inner surface of connector sleeve, the packing_seal circle are connect with sealing intubation interference.
Oil recovery as described above and water injection string, wherein be disposed with sucker rod group in the production pipe from the top down
Part and oil well pump.
Oil recovery as described above and water injection string, wherein the oil pumping bar assembly includes being fixedly connected sequentially from the top down
More sucker rods, and the diameter of the more sucker rods is gradually reduced from the top down.
Oil recovery as described above and water injection string, wherein the water injection string further includes being fixedly connected with the water injection pipe
The second packer；Second packer is located at the top of the water injection valve, second packer and first packing
The water filling space is formed between device.
Oil recovery as described above and water injection string, wherein the water injection string further includes the first hydraulic anchor and the second waterpower
Anchor；First hydraulic anchor is fixedly connected with the water injection pipe, and between first packer and the water injection valve；Institute
It states the second hydraulic anchor to be fixedly connected with the water injection pipe, and is located at the upper end of second packer.
Oil recovery as described above and water injection string, wherein the water injection string further includes being fixedly connected with the water injection pipe
Telescoping tube, the telescoping tube is located at the top of second hydraulic anchor.
The utility model recovers the oil and water injection string, by the way that water injection string is arranged in casing, is arranged in water injection string and adopts
Oil pipe, and being sealed the lower end of the first ring cavity between water injection string and production pipe by seal assembly so that the water of injection according to
It is secondary pass through the first ring cavity, waterflood path, water filling space, the first perforation tunnel enter water filling layer, the petroleum of producing horizon passes sequentially through
Second perforation tunnel, oil recovery space, oil channel and production pipe reach ground.Water filling and oil recovery one provided by the utility model
Body tubing string can both be filled the water, and also be can be carried out oil recovery simultaneously in water filling, be conducive to improve oil well utilization efficiency, additionally it is possible to drop
Low production cost.
Detailed description of the invention
By referring to accompanying drawing described in detail below, the above and other purpose of the utility model embodiment, feature and excellent
Point will become more clearly understood from.In the accompanying drawings, by by example and it is unrestricted in a manner of multiple implementations to the utility model
Example is illustrated, in which:
Fig. 1 is the structural schematic diagram of the utility model oil recovery and water injection string；
Fig. 2 is that liquid flows to schematic diagram when the utility model recovers the oil and water injection string fills the water；
Fig. 3 is that liquid flows to schematic diagram when the utility model recovers the oil and water injection string recovers the oil；
Fig. 4 is the structural schematic diagram of the utility model oil recovery and water injection string water injection valve；
Fig. 5 is the structural schematic diagram of the utility model oil recovery and water injection string seal pipe；
Fig. 6 is the structural schematic diagram that the utility model recovers the oil and water injection string sealing is intubated.
Description of symbols:
1: tubing hanger；2: water injection pipe；3: production pipe；4: oil well pump；5: telescoping tube；6: the second hydraulic anchors；7: the second packings
Device；8: water injection valve；9: the first hydraulic anchors；10: the first packers；11: seal assembly；12: the first perforation tunnels；Penetrate at 13: the second
Hole path；14: sucker rod；15: casing；16: the first ring cavities；17: water filling space；18: oil recovery space；19: top ring cavity；
81: the first connectors；811: first passage；82: central tube；821: central passage；822: water injection hole；83: sliding sleeve；
84: the second connectors；841: second channel；85: the first pins；86: impact space；87: the first sealing rings；88: the second sealing rings；
89: third sealing ring；
111: top connection；1111: upper channel；112: lower contact；1121: lower channel；113: connector sleeve；Connect at 1131: the first
Female connector；1132: the second connector sleeves；114: packing_seal circle；115: ball seat；116: setting ball；117: the second pins；118: sealing
Intubation；1181: interconnecting piece；1182: sealing；1183: oil channel.
Specific embodiment
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model
Limitation.
It is to be appreciated that in the present invention, noun of locality "upper", "top" are referred to close to the side of the well head,
Noun of locality "lower", "bottom" are referred to close to the side in the shaft bottom.
Fig. 1 is the structural schematic diagram of the utility model oil recovery and water injection string；Fig. 2 is the utility model oil recovery and water injection pipe
Liquid flows to schematic diagram when column fills the water；Fig. 3 is that liquid flows to schematic diagram when the utility model recovers the oil and water injection string recovers the oil；Fig. 4
For the utility model oil recovery and the structural schematic diagram of water injection string water injection valve；Fig. 5 is that the utility model recovers the oil and water injection string is close
The structural schematic diagram of tube sealing；Fig. 6 is the structural schematic diagram that the utility model recovers the oil and water injection string sealing is intubated.
Referring to figs. 1 to Fig. 6, the utility model embodiment provides a kind of oil recovery and water injection string comprising from inside to outside according to
Production pipe 3, water injection string and the casing 15 of secondary setting, the gap between production pipe 3 and water injection string form the first ring cavity 16；
Gap between water injection string and casing 15 forms the second ring cavity；Water injection string includes water injection pipe 2, water injection valve 8, the first packer
10 and seal assembly 11, water injection pipe 2 be sequentially installed with water injection valve 8, the first packer 10 and seal assembly 11 from the top down；
Water injection valve 8 is equipped with the waterflood path being connected to the first ring cavity 16；Second ring cavity is separated into close to well head by the first packer 10
Fill the water space 17 and the oil recovery space 18 close to shaft bottom；Seal assembly 11 seals the lower end of the first ring cavity 16, and seal assembly
11 are equipped with the oil channel 1183 being connected to production pipe 3；Oil channel 1183 is connected to oil recovery space 18, the control note of water injection valve 8
Aquaporin is connected to water filling space 17；It is logical that casing 15 is equipped with the first perforation being connected to respectively with water filling space 17 and oil recovery space 18
Road 12 and the second perforation tunnel 13.
Casing 15 is contacted with the borehole wall, and water injection string is located in casing 15, and the gap shape between water injection string and casing 15
At the second ring cavity；Production pipe 3 is located in water injection string, and the gap between production pipe 3 and water injection string forms the first ring cavity 16.
The utility model embodiment to the specific structure size of casing 15 and production pipe 3 without limitation.3 upper end of production pipe and tubing hanger 1
It is threadedly coupled.
2 upper end of water injection pipe is fixedly connected with tubing hanger 1, successively installs water injection valve 8, the first envelope on water injection pipe 2 from the top down
Every device 10 and seal assembly 11.Water injection pipe 2 can be equal with tubing hanger 1, water injection valve 8, the first packer 10 and seal assembly 1
It is connected through a screw thread, it is not limited here.
First packer 10 can be existing self-test sealing packer etc., it is not limited here.From well head into water injection pipe 2
Liquid is injected to preset pressure, sets the first packer 10, the second ring cavity is separated into two ring cavities up and down, wherein upper ring cavity
To fill the water space 17, lower ring cavity is oil recovery space 18.Also, the casing 15 being located in water filling space 17 is equipped with the first perforation tunnel
12, the casing 15 in oil recovery space 18 is equipped with the second perforation tunnel 13.
Water injection valve 8 is equipped with the waterflood path being connected to the first ring cavity 16, for injecting liquid to the water filling layer of oil well.Sealing
Assembly 11 seals the lower end of the first ring cavity 16, and when water filling, the water in the first ring cavity 16 will not enter oil recovery space 18；It recovers the oil
When, the petroleum in oil recovery space 18 can only pass through oil channel 1183 and enter production pipe 3, without entering in water injection pipe 2, this reality
It can not only carry out filling the water but also can recovering the oil with new embodiment water filling and oil recovery integrated pipe column, improve oil mining effect
Rate.
When the utility model embodiment is specifically used, first water injection pipe 2, water injection valve 8 and the first packer 10 are lowered into
In oil well, liquid is then injected in water injection pipe 2 sets the first packer 10 to preset pressure, and to the first packer 10
Test envelope；Then tripping in production pipe 3 and seal assembly 11 seal the lower end of the first ring cavity 16, and tripping in is recovered the oil in production pipe 3
Device.When water filling, water is injected into the first ring cavity 16 in well head, water enters water filling space 17 by the waterflood path of water injection valve,
Then water filling layer is entered by the first perforation tunnel 12；When oil recovery, under the action of extracting device of oil, the petroleum of oil reservoir passes through second
Perforation road 13 enters oil recovery space 18, then enters in production pipe 3 by oil channel 1183, finally reaches ground.
It should be noted that oil recovery provided by the embodiment of the utility model and water injection string can be applied in sandstone oil reservoir class
In type well, it can also apply in other Oil Reservoir Types wells.
It is provided by the embodiment of the utility model water filling and oil recovery integrated pipe column, by casing be arranged water injection string,
Production pipe is set in water injection string, and by seal assembly that the lower end of the first ring cavity between water injection string and production pipe is close
Envelope is recovered the oil so that the water of injection passes sequentially through the first ring cavity, waterflood path, water filling space, the first perforation tunnel enter water filling layer
The petroleum of layer passes sequentially through the second perforation tunnel, oil recovery space, oil channel and production pipe and reaches ground.The utility model is real
The water filling and oil recovery integrated pipe column for applying example offer can both be filled the water, and in water filling while be can be carried out oil recovery, were conducive to improve
Oil well utilization efficiency, additionally it is possible to reduce cost of winning.
Referring to Fig. 4, water injection valve 8 includes the first connector 81, central tube 82 and sliding sleeve 83；The upper end of first connector 81 and note
Water pipe 2 is fixedly connected, and the first connector 81 is equipped with the first passage 811 being connected to water injection pipe 2；The lower end of first connector 81 is arranged
It is fixedly connected in the outside of central tube 82, and with central tube 82, central tube 82 is connected to first passage 811；Central tube 82 is close
One end of first connector 81 is equipped with water injection hole 822；Sliding sleeve 83 is set in the outer of the water injection hole 822 of the first connector 81 and central tube 82
Side, and the upper end of sliding sleeve 83 is fixedly connected by the first pin 85 with the lower end of the first connector 81；The inside of sliding sleeve 83 faces out
Recess forms step surface, and space 86 and water injection hole are impacted in the lower end surface formation impact space 86 of step surface and the first connector 81
822 connections；Preset pressure fluid enters impact space 86 by water injection hole 822, can cut the first pin 84 so that sliding sleeve 83
Along the axially downwardly sliding of central tube 82, so that water injection hole 822 be made to be connected to water filling space 17；Waterflood path includes first passage
811, the central passage 821 and water injection hole 822 of central tube 82.
Specifically, water injection valve 8 includes the first connector 81, central tube 82, sliding sleeve 83 and the second connector 84.First connector 81
Upper end be fixedly connected with water injection pipe 2, conical screw hole has can be set in 81 upper end of the first connector, with water injection pipe 2 be arranged cone
The connection of shape external screw thread.The lower end of first connector 81 is set in the outside of 82 upper end of central tube, optionally, the lower end of the first connector 81
It is equipped with sealing ring with the position of 82 upper end of central tube cooperation, improves the leakproofness of connection.The lower end of central tube 82 and the second connector
84 are fixedly connected, and optionally, the lower end of central tube 82 is equipped with conical external screw thread, with spiral shell in the taper of 84 upper end of the second connector setting
Line connection, the lower end of the second connector 84 is threadedly coupled with the water injection pipe 2 of lower section.Preferably, the upper end and center of the second connector 84
It is provided with third sealing ring 89 between the lower end of pipe 82, improves the leakproofness of connection.First connector 81 is equipped with first passage 811,
Central tube 82 is equipped with central passage 821, and the second connector 84 is equipped with second channel 841, and water injection pipe 2, first passage 811, center are logical
Road 821 and second channel 841 are sequentially communicated, and water injection pipe 2, first passage 811, central passage 821 and second channel
841 is coaxial.
Sliding sleeve 83 is set on the outside of the junction of the first connector 81 and central tube 82, and the lower end of sliding sleeve 83 is more than water filling
The upper end of the position in hole 822, sliding sleeve 83 is fixedly connected by the first pin 85 with the first connector 81.Wherein, the first pin 85 can
With setting one, the first pin 85 also can be set it is multiple, along the first connector 81 circumferencial direction interval be arranged, the utility model
Embodiment to the quantity of the first pin without limitation.The inside of sliding sleeve 83 faces out concave shape into step surface, step surface and first
The lower end surface of connector 81 forms impact space 86, and impact space 86 is connected to water injection hole 822.
Wherein, water injection hole 822 can be set one, also can be set it is multiple, such as two, three, four etc., multiple notes
Water hole 822 is arranged along the circumferencial direction interval of central tube 82.
During decentralization installation water injection string and the first packer 10 set, test envelope, sliding sleeve 83 is set in first
On the outside of the junction of connector 81 and central tube 82, sliding sleeve 83 obstructs water injection hole 822 and is connected to water filling space 17；When being filled the water
When, fluid is injected in the first ring cavity 16 to preset pressure, pressure fluid enters impact space 86 by water injection hole 822, respectively
Apply lower end surface from pressure to the first connector 81 and step surface, under the effect of the pressure, the first pin 84 is cut, sliding sleeve
83 along central tube 82 axially downwardly sliding, water injection hole 822 with water filling space 17 be connected to, the water in the first ring cavity 16 passes sequentially through
First passage 811, central passage 821 and water injection hole 822 enter water filling space 17, then enter by the first perforation tunnel 12
Layer is filled the water, realizes water filling.
Further, in order to guarantee decentralization installation water injection string and the first packer 10 set, test envelope during
The leakproofness of water injection valve 8 is provided with the first sealing ring 87 between sliding sleeve 83 and central tube 82；Between sliding sleeve 83 and the first connector 81
It is provided with the second sealing ring 88, and the second sealing ring 88 is located at the lower section of the first pin 85.
Upper and lower ends in impact space 86 are respectively equipped with the first sealing ring 87 and the second sealing ring 88.First sealing ring 87
It is arranged between sliding sleeve 83 and central tube 82, specifically, the medial surface of sliding sleeve 83 is equipped with sealing ring mounting groove, the first sealing ring 87
It is mounted in the mounting groove.First sealing ring 87 can be set one, the first sealing ring 87 also can be set it is multiple, such as two
It is a, three etc., multiple first sealing rings 87 are arranged along the axially spaced-apart of central tube 82.Second sealing ring 88 is arranged in 83 He of sliding sleeve
Between first connector 81, and the second sealing ring 88 is located at the lower end of the first pin 85.Specifically, the lateral surface of the first connector 81 is set
There is mounting groove, the second sealing ring 88 is mounted in the mounting groove.Second sealing ring 88 can be set one, the second sealing ring 88
It can be set multiple, such as two, three etc., multiple second sealing rings 88 are arranged along the axially spaced-apart of central tube 82.First is close
Seal 87 and the second sealing ring 88 can be existing ring structure, and the utility model embodiment is to the first sealing ring and second
The quantity and type of sealing ring are without limitation.
On the basis of the above embodiments, referring to figure 5 and figure 6, seal assembly 11 include top connection 111, lower contact 112 with
And sealing intubation 118, top connection 111 is fixedly connected with water injection pipe 2 and lower contact 112 respectively；Top connection 111 is equipped with and water injection pipe
The upper channel 1111 of 2 connections, lower contact 112 are equipped with the lower channel 1121 being connected to upper channel 1111；Upper channel 1111 and lower logical
1121 junction of road is equipped with seal assembly；The upper end of sealing intubation 118 is fixedly connected with production pipe 3, and is sealed and set in intubation 118
There is oil channel 1183；The lower end of sealing intubation 118 is connect with seal assembly interference, and the lower end of the first ring cavity 16 is sealed.
Specifically, seal assembly 11 includes seal pipe and sealing intubation 118, and seal pipe includes top connection 111, lower contact
113 and seal assembly, upper end and the water injection pipe 2 of top connection 111 can be connected through a screw thread, the lower end of top connection 111 under
The upper end of connector 112 can be connected through a screw thread.Seal assembly setting is in 1121 junction of upper channel 1111 and lower channel, sealing
Component may include sealing ring, connect with sealing 118 interference of intubation.
When installing tubing string, sealing intubation 118 is lowered into well after being threadedly coupled with production pipe 3.Specifically, sealing intubation
118 include interconnecting piece 1181 and sealing 1182, and interconnecting piece 1181 is threadedly coupled with production pipe 3, sealing 1182 and sealing
Component interference connection, seals the lower end of the first ring cavity 16.When water filling, the water in the first ring cavity 16 will not enter oil recovery space 18；
When oil recovery, the oil in oil recovery space 18 can only enter production pipe 3 by oil channel 1183, without entering in water injection pipe 2.
Generally, coolant-temperature gage is low compared with formation temperature shortens tubing string for injection, alternatively, the fluid temperature (F.T.) of output is higher to make tubing string
Elongation or other reasons cause tubing string to shorten or extend.Therefore, the axial length of the sealing 1182 of sealing intubation 118
It is contemplated that the flexible of tubing string in water filling and oil recovery process, sealing 1182 reserves enough length, is always ensured that sealing
1182 connect with seal assembly interference, avoid being detached from because sealing 1182 is too short with seal assembly, technique is caused to fail.This is practical
Without limitation to the axial length of sealing 1182, those skilled in the art can design new embodiment according to the actual situation.
Further, seal assembly includes connector sleeve 113 and packing_seal circle 114；Connector sleeve 113 is connected to top connection
111 and lower contact 112 formed clamping space in；The inner surface of connector sleeve 113, packing_seal is arranged in packing_seal circle 114
Circle 114 is connect with sealing 118 interference of intubation.
Specifically, connector sleeve 113 includes the first connector sleeve 1131 and the second connector sleeve 1132 being fixedly connected, the first connection
The lower end of set 1131 and the upper end of the second connector sleeve 1132 can be connected through a screw thread.The inside of top connection 111 faces out recess
Formation is appeared on the stage terrace, and the inside of lower contact 112 faces out concave shape at leave from office terrace, in shape between terrace and leave from office terrace of appearing on the stage
At clamping space, the upper end end face of the first connector sleeve 1131 abuts with terrace of appearing on the stage, the lower end surface of the second connector sleeve 1132 and
Leave from office terrace abuts.The inner surface of first connector sleeve 1131 and the second connector sleeve 1132 is equipped with mounting groove, and packing_seal circle 114 is pacified
In mounting groove.Packing_seal circle 114 can be existing structure, it is not limited here.
Optionally, sealing ring, the first connector sleeve 1131 are provided between the first connector sleeve 1131 and the second connector sleeve 1132
It is provided with sealing ring between top connection 111, sealing ring is provided between the first connector sleeve 1131 and lower contact 112, second connects
It is provided with sealing ring between female connector 1132 and lower contact 112, guarantees the leakproofness of seal pipe.
Further, the present embodiment seal pipe further includes ball seat 115, and ball seat 115 is located at the lower channel of lower contact 112
In 1121, in the lower end of seal assembly.Ball seat 115 is fixedly connected by the second pin 117 with lower contact 112, the utility model
Embodiment to the quantity of the second pin 117 without limitation.The upper end of ball seat 115 is the conical surface, preferably to connect with setting ball 116
Touching.Ball seat 115 can also be arranged sealing ring with lower contact 112 and be sealed.
In oil well after tripping in water injection pipe 2, water injection valve 8 and the first packer 10, the first packer 10 is set and
Test the concrete operations of envelope are as follows: setting ball 116 is put into water injection pipe 2, when the taper-face contact of setting ball 116 and ball seat 115, to
To preset pressure, with the raising of pressure in water injection pipe 2, the first packer 10 is set injection liquid, is then proceeded in water injection pipe 2
Liquid is injected into water injection pipe 2 to preset pressure, so that pressure in water injection pipe 2 is reached the setting value that the first packer 10 tests envelope, is beaten
That opens the first packer 10 tests envelope channel, carries out testing envelope to the first packer 10, guarantees the leakproofness of the first packer 10, guarantees
The leakproofness of packer.
It tests and is honored as a queen in the first packer 10, continue to inject liquid into water injection pipe 2 to preset pressure, cut the second pin
117, ball seat 115 and setting ball 116 are destroyed.Then, tripping in production pipe 3, extracting device of oil and sealing intubation 118, so that close
Envelope intubation 118 sealing 1182 connect with 114 interference of packing_seal circle, sealing the first ring cavity 16 lower end, carry out fill the water and
It recovers the oil.
In oil recovery process, extracting device of oil can be sucker rod pump, be also possible to the rodless pumps such as screw pump, jet pump.It is preferred that
Ground, the utility model embodiment water filling and oil recovery integrated pipe column use rod-type pumping unit.Specifically, in production pipe 3 on to
Under be disposed with oil pumping bar assembly and oil well pump 4.Ground pumping unit imparts power to oil well pump by bar assembly of pumping
4, the petroleum in oil pipe is drawn into ground by oil well pump 4.Oil well pump 4 may include pull rod, pump barrel, plunger, inlet valve, delivery valve
Deng, the utility model embodiment to the specific structure of oil well pump without limitation.
Optionally, oil pumping bar assembly includes more sucker rods 14 being fixedly connected sequentially from the top down, and more sucker rods
14 diameter is gradually reduced from the top down.
More sucker rods 14 can be threadedly coupled by box cupling.The structure of sucker rod 14 can be existing sucker rod knot
Structure, the utility model embodiment is it is not limited here.Bar assembly of pumping further includes polished rod, and the sucker rod 14 near well head passes through
Polished rod is connect with pumping unit.Without limitation to the quantity of sucker rod 14, those skilled in the art can be with for the utility model embodiment
It is designed according to well depth.For example, oil pumping bar assembly includes successively being threadedly coupled the first sucker rod, the second sucker rod from the top down
And third sucker rod, the diameter of the outer diameter of the first sucker rod, the second sucker rod and third sucker rod are sequentially reduced, and are guaranteed deep
The structural strength of the sucker rod of underground avoids strength of oil pump rod from being not enough broken.
On the basis of the above embodiments, with continued reference to Fig. 1 to Fig. 3, the present embodiment water injection string further includes and water injection pipe 2
The second packer 7 being fixedly connected；The top of water injection valve 8, the second packer 7 and the first packer 10 is arranged in second packer 7
Between formed water filling space 17.
In order to avoid the corrosion to non-water filling layer casing, the present embodiment water injection string further includes the second packer 7, the second envelope
It can be threadedly coupled every device 7 and the first packer 10 with water injection pipe 2.Second packer 7 and the first packer 10 are by the second ring cavity
It is separated into the oil recovery space 18 close to shaft bottom, among the top ring cavity 19 and oil recovery space 18 and top ring cavity 19 close to well head
Water filling space 17.Second packer 7 can be existing conventional hydraulic packer, self-test sealing packer etc., not limit herein
It is fixed.Second packer 7 can prevent injection water from entering top ring cavity 19, avoid the casing 15 in top ring cavity 19 from being corroded, fill
The integrality of code insurance barrier pit shaft.
Preferably, the first packer 10 is self-test sealing packer.Two packers set test envelope when, to water filling
Injection liquid is to preset pressure in pipe 2, and with the raising of pressure in water injection pipe 2, the first packer 10 and the second packer 7 are sat
Envelope；It then proceedes to inject liquid into water injection pipe 2 to preset pressure, so that pressure is reached the first packer 10 and test envelope
Setting value, open the first packer 10 tests envelope channel, the first packer 10 is carried out testing envelope；Subsequently, in the second ring cavity
Interior injection liquid carries out testing envelope to preset pressure to the second packer 7.
The first packer 10 and the second packer 7 unseal in operation process in order to prevent, and water injection string further includes first
Hydraulic anchor 9 and the second hydraulic anchor 6；First hydraulic anchor 9 is fixedly connected with water injection pipe 2, and is located at the first packer 10 and water injection valve 8
Between；Second hydraulic anchor 6 is fixedly connected with water injection pipe 2, and is located at 7 upper end of the second packer.
First hydraulic anchor 9 and the second hydraulic anchor 6 can be existing waterpower anchor structure, it is not limited here.First waterpower
Anchor 9 and the second hydraulic anchor 6 can be connected through a screw thread with water injection pipe 2.When the pressure in water injection pipe 2 is higher than the pressure outside water injection pipe 2
When power, the first hydraulic anchor 9 and the second hydraulic anchor 6 are in running order, water injection pipe 2 are anchored on the inner wall of casing 15, are prevented
First packer 10 and the deblocking of the second packer 7.The deblocking of packer is packer releasing work shape under the action of predetermined load
The inner wall of state, i.e. packing element no longer sealing sleeve pipe 15.
Further, water injection string further includes the telescoping tube 5 being fixedly connected with water injection pipe 2, and telescoping tube 5 is located at the second water
The top of power anchor 6.Telescoping tube 5 can be existing flexible pipe structure, it is not limited here.The radical and length of telescoping tube can
According to tubing string, in self gravity and water filling, the stroke of tubing string is designed.
With continued reference to Fig. 1 to Fig. 6, the utility model embodiment oil recovery and the water filling of water injection string is specifically described below and adopts
Oily process:
The tripping in water injection string into oil well, water injection string include the water injection pipe 2 for passing sequentially through threaded connection from the top down, stretch
The draw 5, the second hydraulic anchor 6, the second packer 7, water injection valve 8, the first hydraulic anchor 9, the first packer 10 and seal pipe.
When above-mentioned tubing string is lowered into setting position, setting ball 116 is put into water injection pipe 2, to setting ball 116 and ball seat
When 115 taper-face contact, fluid is injected into water injection pipe 2 to preset pressure, with the raising of pressure in water injection pipe 2, the second water
The anchor fluke of power anchor 6 and the first hydraulic anchor 9 is stretched out, and water injection pipe 2 is anchored on the inner wall of casing 15；With pressure in water injection pipe 2
Continue increase, the pin of telescoping tube 5 is cut, and telescoping tube 5 is made to be in Telescoping, and the second packer 7 and first
Packer 10 is set, at this point, the packing element of packer is locked at the inner wall of casing 15 by locking member, packing element is in seal shape always
State.
After second packer 7 and the first packer 10 are set, packer can be carried out testing envelope, the separation of checking sealing of packer
Whether sealing effect reaches preset requirement.Concrete operations are to continue to inject fluid into water injection pipe 2 to preset pressure, make to fill the water
Pressure reaches the setting value that the first packer 10 tests envelope in pipe 2, and that opens the first packer 10 tests envelope channel, to the first packer
10 carry out testing envelope；First packer 10 is tested pressure release in water injection pipe 2 to zero after sealing lattice.Then, stream is injected in the second ring cavity
Body carries out testing envelope to preset pressure to the second packer 7.For example, the pressure of the second ring cavity is 10MPa, pressure stabilizing 15min, pressure drop
0.5MPa is to test sealing lattice.After first packer 10 and the second packer 7 test sealing lattice, continue to inject fluid into water injection pipe 2
To preset pressure, the second pin 117 is cut, ball seat 115 and setting ball 116 are destroyed.
The upper end of production pipe 3 is threadedly coupled with tubing hanger 1, and the lower end of production pipe 2 is threadedly coupled with sealing intubation 118,
Tripping in production pipe 3 and sealing intubation 118 in water injection string, and make the sealing 1182 and packing_seal circle of sealing intubation 118
114 interference connection, seals the lower end of the first ring cavity 16.The size of production pipe 2 is smaller than the size of water injection pipe 2, and 3 He of production pipe
Water injection pipe 2 is coaxial.For example, production pipe 2 is 2 7/8, " oil pipe, water injection pipe 2 are 41/2 " oil pipe.Preferably, water injection pipe 2 is outer diameter
The heavy wall tubing of 114.3mm, production pipe 3 are the heavy wall tubing of outer diameter 73mm.
After production pipe 3 is lowered into setting position, sits and hang tubing hanger 1, and the preventer of well head is removed, install oil recovery
Tree.Generally, tubing hanger 1 includes that water injection pipe tubing hanger and production pipe tubing hanger, water injection pipe are connect with water injection pipe tubing hanger, is recovered the oil
Pipe is connect with production pipe tubing hanger.
In production pipe 3 successively tripping in oil well pump and oil pumping bar assembly, then pumping unit is installed.Pumping unit and sucker rod
Between connect polished rod, polished rod can realize sealing between the polished rod seal box of production tree upper end.
Preferably, oil pumping bar assembly is connected including the first sucker rod, the second sucker rod, third sucker rod by screw thread
It connects；First sucker rod, the second sucker rod, third sucker rod diameter be gradually increased, the first sucker rod, the second sucker rod, third
The length of sucker rod can carry out appropriate adjustment according to the specific depth of setting of oil well pump.
Preferably, the running speed of production pipe 3 and water injection string is lower than 120m/h；The running speed of oil pumping bar assembly is lower than
150m/h guarantees operation safety and construction quality.
It is filled the water into the first ring cavity 16, fixes the shear strength of the first pin 84 of sliding sleeve 83 on water injection valve 8 when pressure reaches
When, the first pin 84 is cut, sliding sleeve 83 along central tube 82 axially downwardly sliding, water injection hole 822 with water filling space 17 be connected to,
The interior water of first ring cavity 16 passes sequentially through first passage 811, central passage 821 and water injection hole 822 and enters water filling space 17, so
Enter water filling layer by the first perforation tunnel 12 afterwards, realizes water filling.
Before tripping in water injection string, the pit shaft of oil well is once handled:
First pass through choke manifold release production pipe in petroleum, pressure release, prevent overflow in production pipe or oil jacket ring cavity.Pressure
Power observes 3~5h after reaching zero；Choke manifold can then use snubbing serving without slime flux；If choke manifold overflow is more than,
Then according to the well killing fluid kill-job of design requirement density.Wherein, the configured well killing fluid in ground is exactly passed through kill-job by kill-job operation
Manifold circulation is injected into shaft bottom, so that the head of liquid in pit shaft is higher than strata pressure, prevents overflow, blowout etc..
Confirm that well head just suppresses 5MPa, pressure stabilizing 30min without tripping in oil pipe blocking valve after overflow, and by regulation, carry out pressure testing,
Guarantee construction safety.Production tree is torn open after pressure testing is qualified, and preventer group is installed；Wherein, the pressure and voltage stabling control just suppressed not with
This is limited.
It acts tubing string in well, conscientiously checks tube corrosion and fouling condition and oil pipe thread damaged condition, check sand-proof pipe
Product sand situation, and recorded in detail, guarantee all information, prepares for the decision in later period.
Tripping in drifting tubing string carries out drifting operation in casing, guarantees that casing is unobstructed.Drifting tubing string include from top to bottom according to
Drilling rod, the gauguste cutter of secondary connection, the length of gauguste cutter need to be greater than the maximum tool of length in well tool string, the outer diameter of gauguste cutter
The maximum tool of outer diameter in well tool string need to be greater than.
Tripping in scrapes wall tubing string and carries out scraping wall operation in casing, guarantees that internal surface of sleeve pipe is clean.Remove the mud on casing wall
Equal residues scrape wall tubing string and include from top to bottom sequentially connected drilling rod, wall scraper, scrape wall in the process in the well of packer setting
It is scraped repeatedly wall 3 times within the scope of 50m above and below section.
Wall scraper is to artificial bottom of a well, turn on pump, huge discharge inject flushing fluid circulation well cleanup to import and export liquid color, viscosity,
Density etc. is consistent.
Term " first ", " second " are used for description purposes only in the description of the present invention, and should not be understood as indicating
Or it implies relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " second " are defined as a result,
Feature can explicitly or implicitly include at least one of the features.In the description of the present invention, the meaning of " plurality " is
At least two, such as two, three etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be
Mechanical connection is also possible to be electrically connected or can communicate each other；It can be directly connected, the indirect phase of intermediary can also be passed through
Even, the connection inside two elements or the interaction relationship of two elements be can be, unless otherwise restricted clearly.For this
For the those of ordinary skill in field, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the present invention unless specifically defined or limited otherwise, fisrt feature is in the second feature " on " or " down "
It can be that the first and second features directly contact or the first and second features are by intermediary mediate contact.Moreover, first is special
Sign can be fisrt feature above the second feature " above ", " above " and " above " and be directly above or diagonally above the second feature, or only
Indicate that first feature horizontal height is higher than second feature.Fisrt feature under the second feature " below ", " below " and " below " can be with
It is that fisrt feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the above description, reference term " one embodiment ", " some embodiments ", " example ", " specific example " or
The description of " some examples " etc. means that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example include
In at least one embodiment or example of the utility model.In the present specification, schematic expression of the above terms need not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
It can be combined in any suitable manner in a or multiple embodiment or examples.In addition, without conflicting with each other, the technology of this field
The feature of different embodiments or examples described in this specification and different embodiments or examples can be combined by personnel
And combination.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should
Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of
Technical characteristic is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new
The range of each embodiment technical solution of type.
Claims (10)
1. a kind of oil recovery and water injection string, which is characterized in that including set gradually from inside to outside production pipe, water injection string and
Casing, the gap between the production pipe and the water injection string form the first ring cavity；The water injection string and described sleeve pipe it
Between gap formed the second ring cavity；
The water injection string includes water injection pipe, water injection valve, the first packer and seal assembly, the water injection pipe from the top down according to
It is secondary that the water injection valve, first packer and the seal assembly are installed；The water injection valve is equipped with and first ring
The waterflood path of chamber connection；Second ring cavity is separated into close to the water filling space of well head and close to shaft bottom by first packer
Oil recovery space；The seal assembly seals the lower end of first ring cavity, and the seal assembly is equipped with and the production pipe
The oil channel of connection；The oil channel is connected to the oil recovery space, and the water injection valve controls the waterflood path and institute
State the connection of water filling space；
Described sleeve pipe is equipped with the first perforation tunnel and second being connected to respectively with the water filling space and the oil recovery space and penetrates
Hole path.
2. oil recovery according to claim 1 and water injection string, which is characterized in that the water injection valve include the first connector, in
Heart pipe and sliding sleeve；
The upper end of first connector is fixedly connected with the water injection pipe, and first connector is equipped with and is connected to the water injection pipe
First passage；The lower end of first connector is set in the outside of the central tube, and is fixedly connected with the central tube, institute
Central tube is stated to be connected to the first passage；
The central tube is equipped with water injection hole close to one end of first connector；
The sliding sleeve is set in the outside of the water injection hole of first connector and the central tube, and the upper end of the sliding sleeve passes through
First pin is fixedly connected with the lower end of first connector；Concave shape is faced out on the inside of the sliding sleeve into step surface, it is described
The lower end surface of step surface and first connector forms impact space, and the impact space is connected to the water injection hole；
Preset pressure fluid enters the impact space by the water injection hole, cuts first pin so that the sliding sleeve edge
The axially downwardly sliding of the central tube is connected to the water injection hole with the water filling space；
The waterflood path includes the first passage, the central tube and the water injection hole.
3. oil recovery according to claim 2 and water injection string, which is characterized in that set between the sliding sleeve and the central tube
It is equipped with the first sealing ring；
The second sealing ring is provided between the sliding sleeve and first connector, and second sealing ring is located at first pin
The lower section of nail.
4. oil recovery according to claim 1 and water injection string, which is characterized in that the seal assembly include top connection, under
Connector and sealing intubation, the top connection are fixedly connected with the water injection pipe and the lower contact respectively；
The top connection is equipped with the upper channel being connected to the water injection pipe, and the lower contact is equipped with and is connected to down with the upper channel
Channel；
The upper channel and the lower channel junction are equipped with seal assembly；
The upper end of the sealing intubation is fixedly connected with the production pipe, and is equipped with the oil channel in sealing intubation；
The lower end of the sealing intubation is connect with the seal assembly interference, and the lower end of first ring cavity is sealed.
5. oil recovery according to claim 4 and water injection string, which is characterized in that the seal assembly include connector sleeve and
Packing_seal circle；
The connector sleeve is connected in the clamping space that the top connection and the lower contact are formed；
The inner surface of the connector sleeve is arranged in the packing_seal circle, and the packing_seal circle and sealing intubation interference connect
It connects.
6. oil recovery according to claim 1-5 and water injection string, which is characterized in that in the production pipe on to
Under be disposed with oil pumping bar assembly and oil well pump.
7. oil recovery according to claim 6 and water injection string, which is characterized in that the oil pumping bar assembly includes from the top down
More sucker rods being fixedly connected sequentially, and the diameter of the more sucker rods is gradually reduced from the top down.
8. oil recovery according to claim 1-5 and water injection string, which is characterized in that the water injection string further includes
The second packer being fixedly connected with the water injection pipe；
Second packer is located at the top of the water injection valve, is formed between second packer and first packer
The water filling space.
9. oil recovery according to claim 8 and water injection string, which is characterized in that the water injection string further includes the first waterpower
Anchor and the second hydraulic anchor；
First hydraulic anchor is fixedly connected with the water injection pipe, and between first packer and the water injection valve；
Second hydraulic anchor is fixedly connected with the water injection pipe, and is located at the upper end of second packer.
10. oil recovery according to claim 9 and water injection string, which is characterized in that the water injection string further include with it is described
The telescoping tube that water injection pipe is fixedly connected, the telescoping tube are located at the top of second hydraulic anchor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821147548.9U CN208830969U (en) | 2018-07-19 | 2018-07-19 | Oil recovery and water injection string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821147548.9U CN208830969U (en) | 2018-07-19 | 2018-07-19 | Oil recovery and water injection string |
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| Publication Number | Publication Date |
|---|---|
| CN208830969U true CN208830969U (en) | 2019-05-07 |
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ID=66306888
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112963112A (en) * | 2019-12-13 | 2021-06-15 | 中国石油天然气股份有限公司 | Wellhead device replacement method |
| CN114482949A (en) * | 2020-10-27 | 2022-05-13 | 中国石油天然气股份有限公司 | Pressure boosting water injection device |
-
2018
- 2018-07-19 CN CN201821147548.9U patent/CN208830969U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112963112A (en) * | 2019-12-13 | 2021-06-15 | 中国石油天然气股份有限公司 | Wellhead device replacement method |
| CN114482949A (en) * | 2020-10-27 | 2022-05-13 | 中国石油天然气股份有限公司 | Pressure boosting water injection device |
| CN114482949B (en) * | 2020-10-27 | 2023-08-22 | 中国石油天然气股份有限公司 | Pressurizing water injection device |
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