CN109236204A - Two-channel oil extraction tubing string - Google Patents
Two-channel oil extraction tubing string Download PDFInfo
- Publication number
- CN109236204A CN109236204A CN201811184425.7A CN201811184425A CN109236204A CN 109236204 A CN109236204 A CN 109236204A CN 201811184425 A CN201811184425 A CN 201811184425A CN 109236204 A CN109236204 A CN 109236204A
- Authority
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- China
- Prior art keywords
- oil inlet
- oil
- production pipe
- petroleum
- outer tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000605 extraction Methods 0.000 title claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 claims abstract description 80
- 239000003208 petroleum Substances 0.000 claims abstract description 48
- 238000007667 floating Methods 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 238000003032 molecular docking Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/18—Pipes provided with plural fluid passages
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/14—Obtaining from a multiple-zone well
Abstract
The present invention relates to a kind of Two-channel oil extraction tubing strings, including outer tube, upper casing inside outer tube upper end is set, and the setting of casing inside outer tube lower end is set, wherein, cased lower part is contacted with oil liquid, and oil liquid enters in the cavity of setting of casing lower part, and the petroleum of acquisition is discharged upper casing by oil pump；The flow string further includes being arranged in outer tube and can be along the production pipe that outer tube rotates upwardly and downwardly, wherein, the centre bore of a upper end opening, lower end closure is arranged in production pipe, and a floating ball is arranged on centre bore, when being full of petroleum in centre bore, jacks up floating ball and petroleum is discharged.Especially, the present invention is by the way that the upper half-turn of the first oil inlet to be set as concaving, lower branch is set as the structure of convex, in petroleum after oil supply port enters the first oil inlet, due to fast speed, which is set, petroleum slows down by a degree of, it avoids generating petroleum disorder and vortex, promotes the collecting efficiency of petroleum.
Description
Technical field
The present invention relates to oil recovery technique field more particularly to a kind of Two-channel oil extraction tubing strings.
Background technique
During existing oil exploitation, when exploitation will according to the distribution situation of each oil reservoir, avoid it is mixed adopt, it is ideal for that can reach
Exploitation effect, commonly use separate zone production mode, when need convert exploitation oil reservoir when, then need to promote mining tubular column, replace
Power tool could convert the oil reservoir of exploitation, and operation procedure is cumbersome, and working efficiency is low.
But separate zone production pipeline in the prior art, be arranged upper and lower level exploitation when, need intermediate structure will on
Lower layer's exploitation switching construction is installed and is set, such as is switched over by way of coker rationed marketing nail, and it also requires setting
Orbit determination road, so as to be allowed hand between upper and lower structures.During deep production, increase the knot that this kind of structure is unfavorable for pipeline
Structure is stablized, and operation sequence is cumbersome.
Summary of the invention
For this purpose, the present invention provides a kind of Two-channel oil extraction tubing string, to overcome the problems, such as that oil recovery efficiency is low in the prior art.
To achieve the above object, the present invention provides a kind of Two-channel oil extraction tubing string, including outer tube, is arranged in outer tube upper end
The upper casing in portion, and the setting of casing inside outer tube lower end is set, wherein cased lower part is contacted with oil liquid, oil liquid into
In the cavity for entering setting of casing lower part, the petroleum of acquisition is discharged upper casing by oil pump；
The flow string further includes being arranged in outer tube and can be along the production pipe that outer tube rotates upwardly and downwardly, wherein production pipe
The centre bore of one upper end opening, lower end closure is set, a floating ball is set on centre bore, when being full of petroleum in centre bore, top
It plays floating ball petroleum is discharged, in centre bore when underfill petroleum, floating ball blocks central aperture；
The upper-end part of driving of the production pipe also sets up the first oil inlet of perforation, the oil inlet end of first oil inlet with
Oil supply port on outer tube outer wall is corresponding, and the petroleum on upper layer is docked by oil supply port with corresponding first oil inlet, and petroleum is by giving
Hydraulic fluid port enters the first oil inlet, and is discharged into from the first oil inlet to the centre bore of production pipe, and after being full of, petroleum is passed through oil
Pump discharge；The second oil inlet, when the first oil inlet is docked with oil supply port, the second oil inlet is arranged in the lower end of the production pipe
Mouth is docked with the inner sidewall of outer tube, when the second cavity that production pipe is moved to the second oil inlet and production pipe lower end contacts, second
Oil inlet is connected to lower layer's petroleum, and lower layer's petroleum is imported in centre bore by the second oil inlet, and after being full of, petroleum is passed through oil
Pump discharge；
Buffer part is arranged in first oil inlet end, wherein the section of the upper half-turn of the first oil inlet after docking is bent
Line meets following formula (1)；
Wherein, l1Indicating the arc length of the section curve of the upper half-turn of the first oil inlet, D indicates the length of the first oil inlet,
Distance from the oil inlet end of the first oil inlet to production pipe inner sidewall, D1Indicate the diameter of the first oil inlet, D2Indicate oil supply port
Diameter, α indicate curve and the first oil inlet centerlines, value be 15-20 °；
The section curve of the lower branch of the first oil inlet after docking meets following formula (2)；
In formula, l2Indicating the arc length of the section curve of the lower branch of the first oil inlet, D indicates the length of the first oil inlet,
Distance from the oil inlet end of the first oil inlet to production pipe inner sidewall, D1Indicate the diameter of the first oil inlet, D2Indicate oil supply port
Diameter, α indicate curve and the first oil inlet centerlines, value be 15-20 °.
Further, several groups curve tooth is arranged in the side wall of the contact position of the production pipe and outer tube, correspondingly, in outer tube
Inner sidewall be also provided with corresponding several groups curve tooth, wherein one group of curve tooth includes three sections,
First curved section determines according to the following equation (3)；
Wherein, L1Indicate the arc length of the first curved section, R indicates longest distance of the curve tooth pitch from production pipe inner sidewall, r table
Show the shortest distance of the curve tooth pitch from production pipe inner sidewall, the initial segment of β the first curved section of expression and horizontal angle.
Further, the second curved section L2, endpoint a to endpoint b (4) determination according to the following equation；
Wherein, L1 indicates the arc length of the first curved section, and R indicates longest distance of the curve tooth pitch from production pipe inner sidewall, r table
Show the shortest distance of the curve tooth pitch from production pipe inner sidewall, the initial segment of β the first curved section of expression and horizontal angle.
Further, third curved section L3, endpoint b to endpoint c (5) determination according to the following equation；
Wherein, L1Indicate the arc length of the first curved section, L2Indicate the arc length of the second curved section, R indicates curve tooth pitch from oil recovery
The longest distance of pipe inner sidewall, r indicate the shortest distance of the curve tooth pitch from production pipe inner sidewall, and β indicates rising for the first curved section
Beginning section and horizontal angle.
Further, the upper surface of the production pipe is contacted with the shaft shoulder of outer tube to realize positioning and limit, in the axis
Washer is set on the lateral wall of production pipe at shoulder.
Further, in one circle groove of the interlude setting of the production pipe, on the inside of the outer tube of corresponding position on also set
Set a circle groove, a reset spring be set in the third cavity that two grooves surround, the upper end of reset spring and production pipe it is recessed
Slot upper side wall is connected, and lower end is connected with the groove bottom end on the inside of outer tube.
Compared with prior art, the beneficial effects of the present invention are Two-channel oil extraction tubing string of the present invention can be respectively to upper
Lower layer's petroleum is acquired, by the way that the oil inlet of different location up and down is arranged on up and down production pipe, between the different layers
Input oil.
In particular, the present invention is by the way that the upper half-turn of the first oil inlet to be set as concaving, lower branch is set as convex
In petroleum after oil supply port enters the first oil inlet due to fast speed, the buffer structure is arranged, petroleum passes through one in structure
Determine slowing down for degree, avoids generating petroleum disorder and vortex, promote the collecting efficiency of petroleum.
In the present invention, it by the structure of three curved sections, will be engaged, and led to by curved section between production pipe and inner wall
Up and down motion is crossed, also, inflection point a is set in the contact position of the first curved section and the second curved section, was moved up and down in production pipe
Cheng Zhong can make production pipe and outer tube wall position and effectively stop by the contact at inflection point a, facilitate production pipe stop and
Counter motion in place.
In particular, in optimum embodiment of the present invention, when determining curve shape, in conjunction with fluid own characteristic, by angle and arc
Shape curve introduces, and the distance between by binding curve length, oil supply port diameter, oil inlet diameter and inner wall, come determine into
The global shape of hydraulic fluid port and curve engaged section；When each curved section is arranged, using sinusoidal, cosine curve flexible, avoid
It generates dead angle and separation generates whirlpool.With the ratio by the way of pin positioning, engaging structure of the invention is easy to operate, it is not easy to
Generate interference.
Detailed description of the invention
Fig. 1 is the overall structure diagram of Two-channel oil extraction tubing string of the invention；
Fig. 2 is the partial structural diagram of Fig. 1 in the present invention；
Fig. 3 is the structural schematic diagram of the connection side wall of floating tubing string of the present invention.
Specific embodiment
Below in conjunction with attached drawing, the forgoing and additional technical features and advantages are described in more detail.
The preferred embodiment of the present invention described with reference to the accompanying drawings.It will be apparent to a skilled person that this
A little embodiments are used only for explaining technical principle of the invention, are not limiting the scope of the invention.
It should be noted that in the description of the present invention, the instruction such as term " on ", "lower", "left", "right", "inner", "outside"
Direction or the term of positional relationship be direction based on the figure or positional relationship, this is intended merely to facilitate description, and
It is not that indication or suggestion described device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore not
It can be interpreted as limitation of the present invention.
In addition it is also necessary to explanation, in the description of the present invention unless specifically defined or limited otherwise, term " peace
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.To those skilled in the art, it can understand that above-mentioned term exists as the case may be
Concrete meaning in the present invention.
Referring to Fig. 1, it is the overall structure diagram of Two-channel oil extraction tubing string of the invention, the production pipe of the present embodiment
Column includes outer tube 9, and the upper casing 91 inside 9 upper end of outer tube is arranged in, and the setting of casing 92 inside 9 lower end of outer tube is arranged in,
Wherein, the lower part of setting of casing 92 is contacted with oil liquid, and oil liquid enters in the cavity of 92 lower part of setting of casing, and upper casing 91 is by the stone of acquisition
Oil is discharged by oil pump.
With continued reference to shown in Fig. 1, the flow string of the present embodiment further includes being arranged in outer tube 9 and can turning above and below outer tube
Dynamic production pipe 93, wherein the centre bore of a upper end opening, lower end closure is arranged in production pipe 93, and it is floating that one is arranged on centre bore
Ball 90 jacks up floating ball and petroleum is discharged when being full of petroleum in centre bore, in centre bore when underfill petroleum, floating ball closing
Centre bore.Certain interval is set between the lateral wall of 93 upper end of production pipe and the inner sidewall of outer tube 9 so that production pipe 93 can on
Lower rotation；Meanwhile cavity 951 is also provided between vertical direction in production pipe 93 and outer tube 9, it is empty to provide production pipe movement
Between.In embodiments of the present invention, the upper surface of production pipe 93 is contacted with the shaft shoulder of outer tube 9 to realize positioning and limit, at this
Washer 952 is set on the lateral wall of the production pipe 93 at the shaft shoulder, in order to not influence the opposite fortune between washer and production pipe
Dynamic, the washer 952 and the inner sidewall of production pipe 93 of the present embodiment are fixed.
With continued reference to shown in Fig. 1, the upper-end part of driving of the production pipe 93 of the present embodiment also sets up the first oil inlet of a perforation
931, the oil inlet end of first oil inlet 931 is corresponding with the oil supply port 953 on 9 outer wall of outer tube, in the present embodiment, upper layer
Petroleum is docked by oil supply port 953 with corresponding first oil inlet, and petroleum enters the first oil inlet 931 by oil supply port 953, and
It is discharged into from the first oil inlet 931 to the centre bore of production pipe 93, after being full of, petroleum is discharged by oil pump.
With continued reference to shown in Fig. 1, the second oil inlet 932 is arranged in the lower end of the production pipe 93 of the present embodiment, first
When oil inlet is docked with oil supply port 953, the second oil inlet 932 is docked with the inner sidewall of outer tube 93, can not be discharged into the stone of lower layer
Oil；When production pipe 93 turns to the second oil inlet 932 and the second cavity 941 of 93 lower end of production pipe contacts, the second oil inlet
932 are connected to lower layer petroleum, and lower layer's petroleum is imported in centre bore by the second oil inlet 932, and after being full of, petroleum is passed through oil
Pump discharge.
With continued reference to shown in Fig. 1, in the one circle groove of interlude setting of production pipe 93, on the inside of the outer tube of corresponding position on
Be also provided with a circle groove, a reset spring 96 be set in the third cavity 954 that two grooves surround, the upper end of reset spring with adopt
The groove upper side wall of oil pipe 93 is connected, and lower end is connected with the groove bottom end on the inside of outer tube.When production pipe 93 rotates down,
Reset spring 96 gradually reduces, and when production pipe is rotated up, reset spring 96 extends, to make the second oil inlet 932 under
Layer petroleum is quickly cut off.
Continuing with shown in Fig. 1 and Fig. 2, first oil inlet 932 of the present embodiment is docked just due to the oil supply port with outer tube
Energy oil inlet, since petroleum is when passing through oil supply port, diameter is smaller, generates disorder and resistance that petroleum flows into, the present embodiment is at this
Buffer part is arranged in oil inlet end, wherein the section curve of the upper half-turn of the first oil inlet after docking meets following formula
(1)；
Wherein, l1Indicating the arc length of the section curve of the upper half-turn of the first oil inlet, D indicates the length of the first oil inlet,
Distance from the oil inlet end of the first oil inlet to production pipe inner sidewall, D1Indicate the diameter of the first oil inlet, D2Indicate oil supply port
Diameter, α indicate curve and the first oil inlet centerlines, value be 15-20 °.
The section curve of the lower branch of the first oil inlet after docking meets following formula (2)；
In formula, l2Indicating the arc length of the section curve of the lower branch of the first oil inlet, D indicates the length of the first oil inlet,
Distance from the oil inlet end of the first oil inlet to production pipe inner sidewall, D1Indicate the diameter of the first oil inlet, D2Indicate oil supply port
Diameter, α indicate curve and the first oil inlet centerlines, value be 15-20 °.
Specifically, the embodiment of the present invention, by the way that the upper half-turn of the first oil inlet to be set as concaving, lower branch is arranged
, due to fast speed, which is set in petroleum after oil supply port enters the first oil inlet for the structure of convex,
Petroleum slows down by a degree of, avoids generating petroleum disorder and vortex, promotes the collecting efficiency of petroleum.
As shown in fig.3, the structural schematic diagram of the connection side wall for floating tubing string of the present invention；The oil recovery of the embodiment of the present invention
Pipe is engaged and is slided with outer tube inner sidewall by rotating when being pressed downward or pulling up.The contact position of production pipe and outer tube
Several groups curve tooth is arranged in side wall, correspondingly, the inner sidewall in outer tube is also provided with corresponding several groups curve tooth, wherein one group
Curve tooth includes three sections, as shown in fig.3,
First curved section determines according to the following equation (3)；
Wherein, L1Indicate the arc length of the first curved section, R indicates longest distance of the curve tooth pitch from production pipe inner sidewall, r table
Show the shortest distance of the curve tooth pitch from production pipe inner sidewall, the initial segment of β the first curved section of expression and horizontal angle.
Second curved section L2, endpoint a to endpoint b (4) determination according to the following equation；
Wherein, L1 indicates the arc length of the first curved section, and R indicates longest distance of the curve tooth pitch from production pipe inner sidewall, r table
Show the shortest distance of the curve tooth pitch from production pipe inner sidewall, the initial segment of β the first curved section of expression and horizontal angle.
Third curved section L3, endpoint b to endpoint c (5) determination according to the following equation；
Wherein, L1Indicate the arc length of the first curved section, L2Indicate the arc length of the second curved section, R indicates curve tooth pitch from oil recovery
The longest distance of pipe inner sidewall, r indicate the shortest distance of the curve tooth pitch from production pipe inner sidewall, and β indicates rising for the first curved section
Beginning section and horizontal angle.
In the present embodiment,
In the present invention, it by the structure of three curved sections, will be engaged, and led to by curved section between production pipe and inner wall
Up and down motion is crossed, also, inflection point a is set in the contact position of the first curved section and the second curved section, was moved up and down in production pipe
Cheng Zhong can make production pipe and outer tube wall position and effectively stop by the contact at inflection point a, facilitate production pipe stop and
Counter motion in place.
In particular, in optimum embodiment of the present invention, when determining curve shape, in conjunction with fluid own characteristic, by angle and arc
Shape curve introduces, and the distance between by binding curve length, oil supply port diameter, oil inlet diameter and inner wall, come determine into
The global shape of hydraulic fluid port and curve engaged section；When each curved section is arranged, using sinusoidal, cosine curve flexible, avoid
It generates dead angle and separation generates whirlpool.
So far, it has been combined preferred embodiment shown in the drawings and describes technical solution of the present invention, still, this field
Technical staff is it is easily understood that protection scope of the present invention is expressly not limited to these specific embodiments.Without departing from this
Under the premise of the principle of invention, those skilled in the art can make equivalent change or replacement to the relevant technologies feature, these
Technical solution after change or replacement will fall within the scope of protection of the present invention.
Claims (6)
1. a kind of Two-channel oil extraction tubing string, which is characterized in that including outer tube, the upper casing inside outer tube upper end is set, and
Setting of casing inside outer tube lower end is set, wherein cased lower part is contacted with oil liquid, and oil liquid enters the sky of setting of casing lower part
Intracavitary, the petroleum of acquisition is discharged upper casing by oil pump；
The flow string further includes being arranged in outer tube and can be along the production pipe that outer tube rotates upwardly and downwardly, wherein production pipe setting
The centre bore of one upper end opening, lower end closure, is arranged a floating ball on centre bore, when being full of petroleum in centre bore, jacks up floating
Petroleum is discharged ball, in centre bore when underfill petroleum, floating ball blocks central aperture；
The upper-end part of driving of the production pipe also sets up the first oil inlet of perforation, the oil inlet end and outer tube of first oil inlet
Oil supply port on outer wall is corresponding, and the petroleum on upper layer is docked by oil supply port with corresponding first oil inlet, and petroleum passes through oil supply port
It is discharged into the first oil inlet, and from the first oil inlet to the centre bore of production pipe, after being full of, petroleum is arranged by oil pump
Out；The second oil inlet is arranged in the lower end of the production pipe, when the first oil inlet is docked with oil supply port, the second oil inlet and
The inner sidewall of outer tube docks, when the second cavity that production pipe is moved to the second oil inlet and production pipe lower end contacts, the second oil inlet
Mouth is connected to lower layer's petroleum, and lower layer's petroleum is imported in centre bore by the second oil inlet, after being full of, petroleum is passed through oil pump and is arranged
Out；
Buffer part is arranged in first oil inlet end, wherein the section curve of the upper half-turn of the first oil inlet after docking accords with
Close following formula (1)；
Wherein, l1Indicate the arc length of the section curve of the upper half-turn of the first oil inlet, D indicates the length of the first oil inlet, from first
Distance of the oil inlet end of oil inlet to production pipe inner sidewall, D1Indicate the diameter of the first oil inlet, D2Indicate the straight of oil supply port
Diameter, α indicate the centerlines of curve and the first oil inlet, and value is 15-20 °；
The section curve of the lower branch of the first oil inlet after docking meets following formula (2)；
In formula, l2Indicate the arc length of the section curve of the lower branch of the first oil inlet, D indicates the length of the first oil inlet, from first
Distance of the oil inlet end of oil inlet to production pipe inner sidewall, D1Indicate the diameter of the first oil inlet, D2Indicate the straight of oil supply port
Diameter, α indicate the centerlines of curve and the first oil inlet, and value is 15-20 °.
2. Two-channel oil extraction tubing string according to claim 1, which is characterized in that the contact position of the production pipe and outer tube
Several groups curve tooth is arranged in side wall, correspondingly, the inner sidewall in outer tube is also provided with corresponding several groups curve tooth, wherein one group
Curve tooth includes three sections,
First curved section determines according to the following equation (3)；
Wherein, L1Indicate the arc length of the first curved section, R indicates longest distance of the curve tooth pitch from production pipe inner sidewall, and r indicates bent
The shortest distance of the line tooth pitch from production pipe inner sidewall, the initial segment of β the first curved section of expression and horizontal angle.
3. Two-channel oil extraction tubing string according to claim 2, which is characterized in that the second curved section L2, endpoint a to endpoint b presses
It is determined according to following formula (4)；
Wherein, L1 indicates the arc length of the first curved section, and R indicates longest distance of the curve tooth pitch from production pipe inner sidewall, and r indicates bent
The shortest distance of the line tooth pitch from production pipe inner sidewall, the initial segment of β the first curved section of expression and horizontal angle.
4. Two-channel oil extraction tubing string according to claim 3, which is characterized in that third curved section L3, endpoint b to endpoint c presses
It is determined according to following formula (5)；
Wherein, L1Indicate the arc length of the first curved section, L2Indicate the arc length of the second curved section, R indicates curve tooth pitch from production pipe
The longest distance of side wall, r indicate the shortest distance of the curve tooth pitch from production pipe inner sidewall, and β indicates the initial segment of the first curved section
With horizontal angle.
5. Two-channel oil extraction tubing string according to claim 2, which is characterized in that the upper surface of the production pipe and outer tube
The shaft shoulder is contacted to realize positioning and limit, and washer is arranged on the lateral wall of the production pipe at the shaft shoulder.
6. Two-channel oil extraction tubing string according to claim 2, which is characterized in that be arranged one in the interlude of the production pipe
Enclose groove, on the inside of the outer tube of corresponding position on be also provided with a circle groove, setting one is multiple in the third cavity that two grooves surround
Position spring, the upper end of reset spring are connected with the groove upper side wall of production pipe, and lower end is connected with the groove bottom end on the inside of outer tube
It connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811184425.7A CN109236204B (en) | 2018-10-11 | 2018-10-11 | Double-channel oil production pipe column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811184425.7A CN109236204B (en) | 2018-10-11 | 2018-10-11 | Double-channel oil production pipe column |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109236204A true CN109236204A (en) | 2019-01-18 |
| CN109236204B CN109236204B (en) | 2020-11-24 |
Family
ID=65052719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811184425.7A Active CN109236204B (en) | 2018-10-11 | 2018-10-11 | Double-channel oil production pipe column |
Country Status (1)
| Country | Link |
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| CN (1) | CN109236204B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006097706A1 (en) * | 2005-03-14 | 2006-09-21 | Stable Services Limited | Downhole apparatus |
| CN201241817Y (en) * | 2008-08-15 | 2009-05-20 | 王敬东 | Double-channel fixing valve of tubular oil well pump |
| CN103089205A (en) * | 2013-01-23 | 2013-05-08 | 大庆纽斯达采油技术开发有限公司延安分公司 | Two-channel oil extraction switch |
| CN103104223A (en) * | 2013-02-05 | 2013-05-15 | 大庆纽斯达采油技术开发有限公司延安分公司 | Three-channel oil production switch |
| CN203050653U (en) * | 2013-01-23 | 2013-07-10 | 大庆纽斯达采油技术开发有限公司延安分公司 | Two-channel oil extraction pipe column |
-
2018
- 2018-10-11 CN CN201811184425.7A patent/CN109236204B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006097706A1 (en) * | 2005-03-14 | 2006-09-21 | Stable Services Limited | Downhole apparatus |
| CN201241817Y (en) * | 2008-08-15 | 2009-05-20 | 王敬东 | Double-channel fixing valve of tubular oil well pump |
| CN103089205A (en) * | 2013-01-23 | 2013-05-08 | 大庆纽斯达采油技术开发有限公司延安分公司 | Two-channel oil extraction switch |
| CN203050653U (en) * | 2013-01-23 | 2013-07-10 | 大庆纽斯达采油技术开发有限公司延安分公司 | Two-channel oil extraction pipe column |
| CN103104223A (en) * | 2013-02-05 | 2013-05-15 | 大庆纽斯达采油技术开发有限公司延安分公司 | Three-channel oil production switch |
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| Publication number | Publication date |
|---|---|
| CN109236204B (en) | 2020-11-24 |
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