CN206458429U - Backflow-preventing oil production pipe column - Google Patents
Backflow-preventing oil production pipe column Download PDFInfo
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- CN206458429U CN206458429U CN201621419847.4U CN201621419847U CN206458429U CN 206458429 U CN206458429 U CN 206458429U CN 201621419847 U CN201621419847 U CN 201621419847U CN 206458429 U CN206458429 U CN 206458429U
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- filling
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- 238000004519 manufacturing process Methods 0.000 title abstract description 19
- 239000003129 oil well Substances 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 239000003921 oil Substances 0.000 abstract description 231
- 239000010779 crude oil Substances 0.000 abstract description 30
- 239000007788 liquid Substances 0.000 abstract description 3
- 235000019198 oils Nutrition 0.000 description 215
- 210000003660 reticulum Anatomy 0.000 description 13
- 239000010410 layer Substances 0.000 description 9
- 238000000605 extraction Methods 0.000 description 3
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000010793 Steam injection (oil industry) Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
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Abstract
The utility model provides a prevent flowing backward oil production pipe, it is arranged in having the oil well of two at least oil reservoirs, and it includes: the oil pipe is arranged in the sleeve, an oil sleeve annulus is formed between the oil pipe and the sleeve, a check valve is arranged at the lower end of the oil pipe, at least two liquid inlet holes are formed in the sleeve at intervals, each liquid inlet hole is correspondingly communicated with one oil layer, a packer is arranged between every two adjacent oil layers, and the packers are arranged in the oil sleeve annulus in a sealing mode; the anti-backflow valve is connected with the oil pipe in series and positioned above the check valve, each anti-backflow valve is opposite to one oil layer, and the oil layer is communicated with the oil pipe through the anti-backflow valve in a state that the pressure in the oil layer opposite to the anti-backflow valve is larger than or equal to the pressure in the oil pipe. The utility model discloses can prevent that the crude oil in a plurality of oil layers from flowing backward, improve the oil well exploitation rate.
Description
Technical field
The utility model is related to field of oilfield exploitation, specifically a kind of reverse-filling flow string exploited suitable for multiple zone
Post.
Background technology
At present, because the unequal reason of development of oil reservoir causes the differing pressure between oil reservoir larger, especially steam soak
The oil well of exploitation causes interlayer pressure difference increasing with the increase for round of handling up so that crude oil production has to take
Layer steam injection measure, and in the extraction stage then using the mode of production of traditional unified extraction so that the crude oil of high pressure zone easily enters
Enter to low pressure layer, so as to have impact on the normal performance of capacity of oilwell.
The problem of existing in view of above-mentioned prior art, the present inventor combines the design for many years of related manufacture field and used
Experience is there is provided a kind of reverse-filling flow string, to overcome drawbacks described above.
Utility model content
The purpose of this utility model is to provide a kind of reverse-filling flow string, and it can prevent the crude oil in multiple oil reservoirs from falling
Fill, improve oil mining rate.
Above-mentioned purpose of the present utility model can be realized using following technical proposal：
The utility model provides a kind of reverse-filling flow string, and it is used in the oil well with least two oil reservoirs, described
Reverse-filling flow string includes：Sleeve pipe, it is interior provided with oil pipe, and oil jacket annular space is formed between the oil pipe and described sleeve pipe, described
The lower end of oil pipe is provided with ball-and-seat, described sleeve pipe and is interval with least two inlet openings, described in each inlet opening and one
Oil reservoir correspondence is connected, and is provided with packer between the adjacent oil reservoir two-by-two, and the packer sealing is located at the oil jacket annular space
It is interior；At least one reverse-filling valve, the reverse-filling valve is connected with the oil pipe and is located at the top of the ball-and-seat, each described
Reverse-filling valve is relative with oil reservoir described in one, and the pressure in the oil reservoir relative with the reverse-filling valve is more than or equal to institute
State in the state of the pressure in oil pipe, the oil reservoir is connected by the reverse-filling valve with the oil pipe.
In a preferred embodiment, the reverse-filling valve includes the hollow valve body connected with the oil pipe, described hollow
The perisporium of valve body, which is provided with the passage of up/down perforation, the passage, is provided with valve seat and the valve bonnet with multiple perforates, the valve
Cover is mobile between the valve bonnet and the valve seat to be provided with valve ball positioned at the lower section of the valve seat.
In a preferred embodiment, the diameter of the valve ball is more than the internal diameter of the valve seat and is less than the interior of the passage
Footpath.
In a preferred embodiment, set in the valve ball in the state of the valve seat, the reverse-filling valve it is logical
Road is in closed state, in the state of the valve ball is seated on the valve bonnet, and the passage of the reverse-filling valve is in connected state.
In a preferred embodiment, the upper end of the hollow valve body is provided with top connection, and the lower end of the hollow valve body is set
There is lower contact.
In a preferred embodiment, the oil reservoir be three, described sleeve pipe provided with three respectively with three oil
The inlet opening of layer correspondence connection, two reverse-filling valves of connecting on the oil pipe, two reverse-filling valves respectively with
The oil reservoir of top and the middle oil reservoir are relative, and the ball-and-seat is relative with the oil reservoir of lower section.
In a preferred embodiment, in the state of the pressure in three oil reservoirs is equal, the oil of top
Layer and the middle oil reservoir are connected by reverse-filling valve described in one with the oil pipe respectively, and the oil reservoir of lower section passes through described
Ball-and-seat is connected with the oil pipe.
In a preferred embodiment, the pressure in the oil reservoir up is all higher than the oil reservoir and the lower section of centre
The oil reservoir in pressure in the state of, the oil reservoir of top passes through the reverse-filling valve corresponding thereto and the oil pipe
Connection, is in closed state with the middle relative reverse-filling valve of the oil reservoir and the ball-and-seat.
In a preferred embodiment, the lower end of the reverse-filling valve of the upper end of the reverse-filling valve of lower section and top
It is connected, two reverse-filling valves of interconnection are connected with the oil pipe, each packer is sealed located at the set
Between the inwall of pipe and the reverse-filling valve.
In a preferred embodiment, two reverse-filling valve intervals are connected with the oil pipe, and the packer is close
Envelope is between the inwall and the oil pipe of described sleeve pipe.
The characteristics of the utility model reverse-filling flow string and advantage are：
1st, the utility model is applied to the exploitation of the oil well with multiple similar and different pressure oil reservoirs, can effectively prevent
Only in oil well production process, because the pressure between each oil reservoir in oil reservoir is different, and cause the crude oil of high pressure oil reservoir to low pressure
The phenomenon poured in down a chimney in oil reservoir (is particularly suitable for use in the production of the initial stage of production of steam-stimulated well, because steam-stimulated well is in initial stage of production
When, the pressure differential between oil reservoir is big, and the crude oil and energy of the high oil reservoir of pressure largely enter in the low oil reservoir of pressure), this practicality is newly
Type realizes the height of the pressure in oil reservoir and produces the original in relative each high pressure oil reservoir successively by the setting of reverse-filling valve
Oil, when the pressure in each oil reservoir is equal, then produces crude oil in each oil reservoir simultaneously, it is to avoid crude oil in different pressures oil reservoir
Pour in down a chimney, reduce energy loss, give full play to oily well capacity, improve oil well recovery ratio, improve capacity usage ratio.
2nd, because the oil product composition in each oil reservoir in oil reservoir or performance are different, it can be caused between different oil reservoirs as poured in down a chimney
Mutual intervention and bring different degrees of pollution, the normal production and post-processing to oil well bring different degrees of difficulty,
The utility model can be by avoiding pouring in down a chimney in oil reservoir from overcoming the difficulty to a certain extent, it is to avoid the original in different pressures oil reservoir
Oil pollutes in oil reservoir.
Brief description of the drawings
, below will be to needed for embodiment description in order to illustrate more clearly of the technical scheme in the utility model embodiment
The accompanying drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some realities of the present utility model
Example is applied, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is the structural representation of reverse-filling flow string of the present utility model；
Fig. 2 is the structural representation of the reverse-filling valve of reverse-filling flow string of the present utility model；
Fig. 3 be Fig. 2 in A portions mplifying structure schematic diagram.
Drawing reference numeral explanation：
1 jointing, 2 reverse-filling valves, 21 top connections, 22 hollow valve bodies, 23 valve seats, 24 valve balls, 25 valve bonnets, 26 passages,
27 lower contacts, 28 perforates, 3 inlet openings, 4 packers, 5 oil pipes, 6 ball-and-seats, 7 sleeve pipes, 8 oil reservoirs.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belongs to the scope of the utility model protection.
In addition to non-individual defines the direction pointed out, the direction such as upper and lower being referred to herein is with the utility model
The direction such as upper and lower in shown Fig. 1 is defined, and illustrates in this together.
As depicted in figs. 1 and 2, the utility model provides a kind of reverse-filling flow string, and the reverse-filling flow string is used
In the oil well with least two oil reservoirs 8, the reverse-filling flow string includes：Sleeve pipe 7, it is interior provided with oil pipe 5, the oil
Oil jacket annular space is formed between pipe 5 and described sleeve pipe 7, the lower end of the oil pipe 5, which is provided with ball-and-seat 6, described sleeve pipe 7, to be interval with
At least two inlet openings 3, each connection corresponding with oil reservoir described in one 8 of inlet opening 3, two-by-two between the adjacent oil reservoir 8
Provided with packer 4, the sealing of packer 4 is in the oil jacket annular space；At least one reverse-filling valve 2, the reverse-filling valve 2
Connected with the oil pipe 5 and positioned at the top of the ball-and-seat 6, each reverse-filling valve 2 is relative with oil reservoir described in one 8,
Pressure in the oil reservoir 8 relative with the reverse-filling valve 2 is more than or equal in the state of the pressure in the oil pipe 5,
The oil reservoir 8 is connected by the reverse-filling valve 2 with the oil pipe 5.
Specifically, as shown in figure 1, the lower end of oil pipe 5 set ball-and-seat 6 include with courage jacking mouth shape runner pedestal and
The spheroid so that runner to be closed in pedestal can be set, the effect of the ball-and-seat 6 is opening for the crude oil in bottom oil reservoir 8
Adopt, i.e., the ball-and-seat 6 that the lower end of oil pipe 5 is set can connect the oil reservoir 8 and oil pipe 5 of bottom, meanwhile, ball-and-seat 6 can also be most
When pressure in the oil reservoir 8 of lower section is less than the pressure in oil pipe 5, prevent the crude oil in the oil reservoir 8 of bottom from entering oil pipe 5, when
So, the lower end for the oil pipe 5 that ball-and-seat 6 can also be not provided with, as long as bottom is realized in its lower section for being located at nethermost packer 4
The exploitation of oil reservoir 8；Each inlet opening 3 can be made up of multiple apertures, and the distribution of multiple apertures can be netted, not only improve original
Oil exploitation, has filtering function, and the distribution for the oil reservoir 8 that each inlet opening 3 can be according to corresponding to it, in sleeve pipe 7 again
Circumferencial direction on corresponding scope is set, such as oil reservoir 8 has crude oil in circumferencial direction, then inlet opening 3 can be in sleeve pipe 7
Circumferencial direction on be uniformly distributed；The size and the size of oil pipe 5 at least one the reverse-filling valve 2 connected on oil pipe 5 match,
The oil jacket annular space is formed between oil pipe 5 and sleeve pipe 7 i.e. after series connection reverse-filling valve 2, the described anti-down of the oil pipe 5 is series at
The top that valve 2 is respectively positioned on the ball-and-seat 6 is filled, enables the exploitation of the correspondence bottom of ball-and-seat 6 oil reservoir 8, and reverse-filling valve 2 can be right
Answer the exploitation of other oil reservoirs 8 of the top of bottom oil reservoir 8, namely each reverse-filling valve 2 with positioned at the top of packer 4
Oil reservoir 8 is relative described in one.
Further, as shown in Figures 2 and 3, the reverse-filling valve 2 includes the hollow valve body 22 connected with the oil pipe 5,
The perisporium of the hollow valve body 22 is provided with the passage 26 of up/down perforation, the passage 26 provided with valve seat 23 and opened with multiple
The valve bonnet 25 in hole 28, the valve bonnet 25 is located at the lower section of the valve seat 23, can be moved between the valve bonnet 25 and the valve seat 23
Be provided with valve ball 24, specifically, reverse-filling valve 2 is substantially in hollow cylindrical, the upper end of the hollow valve body 22 is provided with top connection
21, the upper inside wall of top connection 21 is provided with internal thread, and the bottom outer wall of top connection 21 is provided with external screw thread, the lower end of the hollow valve body 22
Provided with lower contact 27, the external wall of upper portion of lower contact 27 is provided with external screw thread, and the lower inner wall of lower contact 27 is provided with internal thread, in favor of that will prevent
Pour in down a chimney valve 2 to be connected on the grade downhole tool of oil pipe 5, the inner chamber of hollow valve body 22 and the intracavity inter-connection with its oil pipe 5 being connected,
In favor of extraction crude oil, passage 26 is cylindrical, and the upper end internal whorl of passage 26 is connected with valve seat 23, and the inside of passage 26 is set
There is valve bonnet 25, valve bonnet 25 is located at the lower end of valve seat 23, enable the valve ball 24 being located between valve bonnet 25 and valve seat 23 with the He of oil reservoir 8
Pressure size in oil pipe 5 and be displaced between valve bonnet 25 and valve seat 23.
Further, as shown in figure 3, the diameter of the valve ball 24 is more than the internal diameter of the valve seat 23 and logical less than described
The internal diameter in road 26, enables valve ball 24 smoothly to move up and down, and can set on valve seat 23 with tight closure passage 26, in institute
Valve ball 24 is stated to set in the state of the valve seat 23, namely the pressure in oil pipe 5 is more than the oil reservoir corresponding to the reverse-filling valve 2
Pressure in 8, and highly pressurised liquid in oil pipe 5 is entered the jack-up of valve ball 24 in passage 26 and is set when on valve seat 23, institute
The passage 26 for stating reverse-filling valve 2 is in closed state, makes the crude oil in the oil reservoir 8 corresponding to the reverse-filling valve 2 can not be through passage 26
Into in oil pipe 5；In the state of the valve ball 24 is seated on the valve bonnet 25, namely pressure in oil pipe 5 is less than or waited
Pressure in the oil reservoir 8 corresponding to the reverse-filling valve 2, valve ball 24 is in the oil reservoir 8 corresponding to self gravitation and the reverse-filling valve 2
When being seated under the pressure of interior crude oil on valve bonnet 25, the passage 26 of the reverse-filling valve 2 is in connected state, makes the reverse-filling valve
The crude oil in oil reservoir 8 corresponding to 2 smoothly can enter in oil pipe 5 through passage 26.
In one embodiment, as shown in figure 1, the oil reservoir 8 be three, described sleeve pipe 7 provided with three respectively with three
Two reverse-filling valves 2 of series connection on the inlet opening 3 of the correspondence of oil reservoir 8 connection, the oil pipe 5, two described anti-down
Fill valve 2 relative with the oil reservoir 8 of top and the oil reservoir 8 of centre respectively, the ball-and-seat 6 and the oil reservoir 8 of lower section
Relatively, namely two reverse-filling valves 2 are relative with inlet opening 3 positioned at the top of a packer 4 respectively, specifically
, three oil reservoirs 8 are arranged at intervals, and the reverse-filling valve 2 of top is oppositely arranged with the level of inlet opening 3 of top, the reverse-filling of lower section
The level of inlet opening 3 of valve 2 and centre is oppositely arranged, between the packer 4 of top oil reservoir 8 above and the oil reservoir 8 of centre,
The packer 4 of lower section is located between middle oil reservoir 8 and the oil reservoir 8 of lower section, the original in the oil reservoir 8 of top and middle oil reservoir 8
Oil can be respectively by the inlet opening 3 of corresponding top and the sleeve pipe 7 of inlet opening 3 of centre.
Further, in the state of the pressure in three oil reservoirs 8 is equal, the oil reservoir 8 of top and centre
The oil reservoir 8 connected respectively by reverse-filling valve 2 described in one with the oil pipe 5, the oil reservoir 8 of lower section passes through the single current
Valve 6 is connected with the oil pipe 5；The pressure in the oil reservoir 8 up be all higher than centre the oil reservoir 8 and lower section it is described
In the state of pressure in oil reservoir 8, the oil reservoir 8 of top is connected by the reverse-filling valve 2 corresponding thereto and the oil pipe 5
Logical, the reverse-filling valve 2 relative with the middle oil reservoir 8 and the ball-and-seat 6 are in closed state.
In one embodiment, the upper end of the reverse-filling valve 2 of lower section and the lower end phase of the reverse-filling valve 2 of top
Even, two reverse-filling valves 2 of interconnection are connected with the oil pipe 5, and each packer 4 is sealed located at the set
Between the inwall of pipe 7 and the reverse-filling valve 2, specifically, be directly connected between two reverse-filling valves 2, lower section it is anti-down
Fill valve 2 to be threadedly coupled with the lower contact 27 of the reverse-filling valve 2 of top by its top connection 21, the reverse-filling valve 2 of lower section passes through it
Lower contact 27 is threadedly coupled with oil pipe 5, and the top connection 21 of the reverse-filling valve 2 of top is threadedly coupled that (i.e. screw thread connects with jointing 1
Connect), then be connected by jointing 1 with oil well pump or tubing round thread, the sealing of packer 4 of top located at sleeve pipe 7 inwall with
Between the outer wall of the lower contact 27 of the reverse-filling valve 2 of top (or the sealing of packer 4 of top is located at the inwall of sleeve pipe 7 and two
The junction of the reverse-filling valve 2), the sealing of packer 4 of lower section is under the inwall of sleeve pipe 7 and the reverse-filling valve 2 of lower section
Between the outer wall of joint 27 (or the sealing of packer 4 of lower section is located at the inwall of sleeve pipe 7 and the reverse-filling valve 2 and the oil of lower section
The junction of pipe 5).
In another embodiment, as shown in figure 1, being connected with the oil pipe 5 of being spaced of two reverse-filling valves 2, described
The sealing of packer 4 is between the inwall and the oil pipe 5 of described sleeve pipe 7, specifically, between two reverse-filling valves 2
Connect and indirect connection in succession, oil pipe 5 includes being located at upper oil pipe, connected pipes and lower oil pipe, wherein connected pipes from top to bottom
It can be formed by connecting for multiple seed oil pipes, ball-and-seat 6 is arranged at the lower end of lower oil pipe, and the reverse-filling valve 2 of lower section is connected to lower oil pipe
Between connected pipes, the reverse-filling valve 2 of top is connected between oil pipe and connected pipes, i.e., top reverse-filling valve 2 with
The reverse-filling valve 2 of lower section is connected by connected pipes, and the length of connected pipes can be set according to the difference in height of OIH layer, be made
Two reverse-filling valves 2 correspond to an oil reservoir respectively, and the sealing of packer 4 of lower section is located between the inwall of sleeve pipe 7 and lower oil pipe, on
The sealing of packer 4 of side is between the inwall and connected pipes of sleeve pipe 7.
The utility model reverse-filling flow string is opened suitable for multiple zone exploitation, the particularly heavy oil wells with multiple zone
Adopt, below by taking the oil well with three oil reservoirs 8 as an example, the specific works situation to the utility model reverse-filling flow string is carried out
Explanation：
First, the oil reservoir 8 of top, middle oil are first divided into according to the pressure of each oil reservoir in the oil reservoir of underground before tubing string is gone into the well
Layer 8 and the oil reservoir 8 of lower section, and inlet opening 3 is opened up at each position of oil reservoir 8 of correspondence, the packer 4 above the calculating of ground is with
The setting position of the packer 4 of side, wherein, the packer 4 of lower section can be sealed using Y211 packers of the prior art or Y221
Every device, the packer 4 of top can use Y111 packers of the prior art, herein the structure no longer to existing each packer
Repeated with principle, each packer 4 is needed to be adapted with sleeve pipe 7, such as the external diameter of each packer 4 is adapted with the internal diameter of sleeve pipe 7,
And set using above putting to put or above carry by the way of rotation is transferred, after the packer 4 of lower section is set, the packer 4 of top is sat again
Envelope, then, will be in series with the tripping in sleeve pipe 7 of oil pipe 5 of two reverse-filling valves 2, wherein, the upper end of reverse-filling valve 2 connection of top
Jointing 1 can connect oil well pump (certain oil well pump also can be plugged into oil pipe)；
When pressure is higher than other two oil reservoirs 8 in the oil reservoir 8 of top, the crude oil in the oil reservoir 8 of top passes through top
The reverse-filling valve 2 through top enters in oil pipe 5 after inlet opening 3, because the crude oil pressure in the oil reservoir 8 of top is higher, enters
The passage 26 of reverse-filling valve 2 of the crude oil through lower section in oil pipe 5 closes close set of the valve ball 24 in it on valve seat 23
Passage 26, so that the crude oil in middle oil reservoir 8 just cannot be introduced into oil pipe 5, and the oil reservoir 8 of the top entered in oil pipe 5
Interior crude oil will not be also entered in the oil reservoir 8 of centre, meanwhile, the spheroid in ball-and-seat 6 can be made by entering the crude oil in oil pipe 5
Closely set on the runner of pedestal, close ball-and-seat 6, and then the crude oil in the oil reservoir 8 of lower section just cannot be introduced into oil pipe 5
It is interior, and enter the crude oil in the oil reservoir 8 of the top in oil pipe 5 and will not also enter in the oil reservoir 8 of lower section, until the oil of top
Pressure in layer 8 is equal with the pressure in other any oil reservoirs 8 or equal with the pressure in other two oil reservoirs 8；
When the pressure in two oil reservoirs 8 is equal, then two co-productions of oil reservoir 8；Pressure phase in two oil reservoirs 8
Deng and during more than pressure in another oil reservoir 8, then first co-production of two oil reservoirs 8, after equal with another pressure of oil reservoir 8,
Three co-productions of oil reservoir 8；When the pressure in three oil reservoirs 8 is equal, then three equal oil reservoirs 8 of pressure are simultaneously common raw
Crude oil in production, i.e., each oil reservoir 8 enters in oil pipe 5, realizes and exploits simultaneously；The utility model realizes oil production by layer, carries
High coefficient of mining and capacity usage ratio.
The characteristics of the utility model reverse-filling flow string and advantage are：
1st, the utility model is applied to the exploitation of the oil well with multiple similar and different pressure oil reservoirs 8, can be effective
Prevent in oil well production process, because the pressure between each oil reservoir 8 in oil reservoir is different, and cause the crude oil of high pressure oil reservoir to low
The phenomenon poured in down a chimney in force feed layer (is particularly suitable for use in the production of the initial stage of production of steam-stimulated well, because steam-stimulated well is first in exploitation
During the phase, the pressure differential between oil reservoir is big, and the crude oil and energy of the high oil reservoir of pressure largely enter in the low oil reservoir of pressure), this practicality
The new setting by reverse-filling valve 2, realizes the height of the pressure in oil reservoir 8 and produces successively in relative each high pressure oil reservoir
Crude oil, when the pressure in each oil reservoir 8 is equal, then produces the crude oil in each oil reservoir 8, it is to avoid in different pressures oil reservoir 8 simultaneously
Pouring in down a chimney for crude oil, reduces energy loss, gives full play to oily well capacity, improves oil well recovery ratio, improves capacity usage ratio.
2nd, because the oil product composition in each oil reservoir 8 in oil reservoir or performance are different, different oil reservoirs can be caused as poured in down a chimney
Between mutual intervention and bring different degrees of pollution, the normal production and post-processing to oil well bring different degrees of tired
Difficulty, the utility model can be by avoiding pouring in down a chimney in oil reservoir 8 from overcoming the difficulty to a certain extent, it is to avoid in different pressures oil reservoir
Crude oil polluted in oil reservoir.
The schematical embodiment of the utility model is the foregoing is only, and is not used to limit model of the present utility model
Enclose.Any those skilled in the art, the equivalent variations made on the premise of principle of the present utility model and design is not departed from
With modification, protection domain of the present utility model all should be belonged to.
Claims (10)
1. a kind of reverse-filling flow string, it is characterised in that the reverse-filling flow string is used for at least two oil reservoirs
In oil well, the reverse-filling flow string includes：
Sleeve pipe, it is interior provided with oil pipe, oil jacket annular space is formed between the oil pipe and described sleeve pipe, the lower end of the oil pipe is provided with single
Flow and be interval with least two inlet openings in valve, described sleeve pipe, each inlet opening connection corresponding with oil reservoir described in one, two-by-two
Packer is provided between the adjacent oil reservoir, the packer sealing is in the oil jacket annular space；
At least one reverse-filling valve, the reverse-filling valve is connected with the oil pipe and is located at the top of the ball-and-seat, Mei Gesuo
State that reverse-filling valve is relative with oil reservoir described in one, the pressure in the oil reservoir relative with the reverse-filling valve is more than or equal to
In the state of pressure in the oil pipe, the oil reservoir is connected by the reverse-filling valve with the oil pipe.
2. reverse-filling flow string according to claim 1, it is characterised in that the reverse-filling valve includes and the oil pipe
The hollow valve body of series connection, the perisporium of the hollow valve body is provided with the passage of up/down perforation, the passage and is provided with valve seat and tool
There is the valve bonnet of multiple perforates, the valve bonnet is located at the lower section of the valve seat, mobile between the valve bonnet and the valve seat to set
There is valve ball.
3. reverse-filling flow string according to claim 2, it is characterised in that the diameter of the valve ball is more than the valve seat
Internal diameter and less than the passage internal diameter.
4. reverse-filling flow string according to claim 2, it is characterised in that set in the valve ball in the valve seat
Under state, the passage of the reverse-filling valve is in closed state, in the state of the valve ball is seated on the valve bonnet, described anti-
The passage for pouring in down a chimney valve is in connected state.
5. reverse-filling flow string according to claim 2, it is characterised in that the upper end of the hollow valve body is provided with and above connect
Head, the lower end of the hollow valve body is provided with lower contact.
6. reverse-filling flow string according to claim 1 or 2, it is characterised in that the oil reservoir is three, described sleeve pipe
Two reverse-fillings of series connection on the inlet opening provided with three respectively with the corresponding connection of three oil reservoirs, the oil pipe
Valve, two reverse-filling valves are relative with the oil reservoir of top and the oil reservoir of centre respectively, the ball-and-seat and lower section
The oil reservoir it is relative.
7. reverse-filling flow string according to claim 6, it is characterised in that the pressure in three oil reservoirs is homogeneous
Deng in the state of, the oil reservoir of top and the oil reservoir of centre are connected by reverse-filling valve described in one and the oil pipe respectively
Logical, the oil reservoir of lower section is connected by the ball-and-seat with the oil pipe.
8. reverse-filling flow string according to claim 6, it is characterised in that the pressure in the oil reservoir up is equal
In the state of the pressure in the middle oil reservoir and the oil reservoir of lower section, the oil reservoir of top passes through corresponding thereto
The reverse-filling valve connected with the oil pipe, it is equal with the middle relative reverse-filling valve of the oil reservoir and the ball-and-seat
In closed state.
9. reverse-filling flow string according to claim 6, it is characterised in that the upper end of the reverse-filling valve of lower section with
The lower end of the reverse-filling valve of top is connected, and two reverse-filling valves of interconnection are connected with the oil pipe, Mei Gesuo
Packer is stated to seal between the inwall and the reverse-filling valve of described sleeve pipe.
10. reverse-filling flow string according to claim 6, it is characterised in that two reverse-filling valve intervals with
The oil pipe series connection, the packer sealing is between the inwall and the oil pipe of described sleeve pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621419847.4U CN206458429U (en) | 2016-12-21 | 2016-12-21 | Backflow-preventing oil production pipe column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621419847.4U CN206458429U (en) | 2016-12-21 | 2016-12-21 | Backflow-preventing oil production pipe column |
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| Publication Number | Publication Date |
|---|---|
| CN206458429U true CN206458429U (en) | 2017-09-01 |
Family
ID=59698354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621419847.4U Active CN206458429U (en) | 2016-12-21 | 2016-12-21 | Backflow-preventing oil production pipe column |
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| Country | Link |
|---|---|
| CN (1) | CN206458429U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112324405A (en) * | 2019-08-05 | 2021-02-05 | 中国石油天然气股份有限公司 | Resistance-increasing oil extraction device for improving utilization rate of injected gas and manufacturing method thereof |
| WO2022182367A1 (en) * | 2021-02-27 | 2022-09-01 | Halliburton Energy Services, Inc. | Packer sub with check valve |
-
2016
- 2016-12-21 CN CN201621419847.4U patent/CN206458429U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112324405A (en) * | 2019-08-05 | 2021-02-05 | 中国石油天然气股份有限公司 | Resistance-increasing oil extraction device for improving utilization rate of injected gas and manufacturing method thereof |
| CN112324405B (en) * | 2019-08-05 | 2022-11-04 | 中国石油天然气股份有限公司 | Resistance-increasing oil extraction device for improving utilization rate of injected gas and manufacturing method thereof |
| WO2022182367A1 (en) * | 2021-02-27 | 2022-09-01 | Halliburton Energy Services, Inc. | Packer sub with check valve |
| US11466539B2 (en) | 2021-02-27 | 2022-10-11 | Halliburton Energy Services, Inc. | Packer sub with check valve |
| GB2616559A (en) * | 2021-02-27 | 2023-09-13 | Halliburton Energy Services Inc | Packer sub with check valve |
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