CN202810815U - Mechanical lifting process pipe column for SAGD production well - Google Patents
Mechanical lifting process pipe column for SAGD production well Download PDFInfo
- Publication number
- CN202810815U CN202810815U CN 201220405778 CN201220405778U CN202810815U CN 202810815 U CN202810815 U CN 202810815U CN 201220405778 CN201220405778 CN 201220405778 CN 201220405778 U CN201220405778 U CN 201220405778U CN 202810815 U CN202810815 U CN 202810815U
- Authority
- CN
- China
- Prior art keywords
- pipe
- lining pipe
- internal lining
- screen casing
- oil
- 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.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000010796 Steam-assisted gravity drainage Methods 0.000 title claims abstract description 40
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 239000003129 oil well Substances 0.000 claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 239000000725 suspension Substances 0.000 claims description 20
- 238000011084 recovery Methods 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 abstract description 25
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 23
- 239000003921 oil Substances 0.000 description 23
- 238000011161 development Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000007701 flash-distillation Methods 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 238000010793 Steam injection (oil industry) Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 210000000481 breast Anatomy 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003027 oil sand Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model discloses a mechanical lifting process pipe column of an SAGD production well, which comprises a thermal production well mouth, a sleeve, an oil well pump, a sieve pipe and a combined lining pipe; the combined lining pipe is positioned inside the sieve pipe and is formed by connecting two sections of coiled tubing with equal length and unequal diameter through a lining pipe coupling; the first section of the combined lining pipe is connected with the bottom end of the sleeve pipe in a sealing way through a lining pipe sealing hanger; the first section of lining pipe of the combined lining pipe is positioned at the bottom end of the sleeve, and the outer diameter of the first section of lining pipe is 2/3 of the inner diameter of the sieve pipe; the second section of lining pipe extends to the toe end of the sieve tube, and the outer diameter of the second section of lining pipe is 1/2 of the inner diameter of the sieve tube. Therefore, the utility model discloses can prevent effectively that SAGD machinery from lifting the in-process and not having the screen pipe when interior bushing pipe with the end steam scurries, or screen pipe toe end steam scurries when going into the bushing pipe in the single size down, is favorable to the horizontal segment evenly to go out the liquid, reduces the steam and scurries, improves single-well output.
Description
Technical field
The utility model relates to a kind of heavy oil wells production practice tubing string, especially relates to a kind of viscous crude SAGD producing well mechanical lift process pipe string.
Background technology
SAGD (Steam Assisted Gravity Drainage:SAGD) technology is the ripe development technique that conventional steam injection technology is difficult to special viscous crude and the super-heavy oil deposit of effective exploitation, Canadian oil-sand mining area is widely used abroad, has also entered the industrial test stage in China.Its technological principle is to adopt two mouthfuls of stacked up and down water horizontal wells to form an injector-producer pair at same oil reservoir, upper water horizontal well steam injection, and the lower horizontal well recovers the oil.At home in the SAGD development process, the horizontal well producing well all adopts sieve tube completion, and employing sucker rod pump or screw pump mechanical lift, because sucker rod pump or screw pump can only be lowered to the horizontal segment heel end, be subjected to horizontal segment along the impact of Cheng Liudong frictional resistance, near the horizontal segment heel end liquid outlet quantity the pump is large, and horizontal segment middle part, toe-end liquid outlet quantity are little, sucker rod pump mainly recovers the oil from the horizontal segment heel end, and in the horizontal segment, the output of toe-end can not effectively be employed; The even more serious impact that brings thus is, it is serious uneven that long-term heel end fluid causes the horizontal segment vapor chamber to grow easily, and heel end with the risk that aggravation heel end vapour is altered, reduces yield level and the recovery ratio of SAGD as main liquid outlet channel greatly.And when being lowered to the internal lining pipe of common single size in the screen casing, because the flow resistance of the direction of flow internal lining pipe that the screen casing heel end enters is far longer than the fluid flow resistance that the screen casing toe-end enters, therefore, the preferential fluid of screen casing toe-end, long-term exploitation will aggravate the risk that screen casing toe-end vapour is altered.
In order further to improve the even development degree of producing well horizontal segment, demand urgently a kind ofly for the even fluid process pipe string of horizontal segment in the SAGD producing well mechanical lift process, effectively address the above problem.
The utility model content
The technical problem that the utility model solves provides the even fluid process pipe string of horizontal segment in a kind of SAGD producing well mechanical lift process, prevent that effectively horizontal segment fluid inequality causes in the mechanical lift process heel end or toe-end vapour from altering, improve yield level and recovery ratio.
Technical solution of the present utility model is:
A kind of SAGD producing well mechanical lift process pipe string, wherein, this process pipe string comprises:
Thermal production well mouth, it comprises an oil well pump sealing and suspension arrangement and cover sluice valve, this thermal production well mouth top is provided with extracting device of oil;
Sleeve pipe, its top and described wellhead assembly are tightly connected;
High-temperature oil pump, its top and described wellhead assembly are tightly connected, and hang on described inside pipe casing centre position, form the oil recovery annular space between this high-temperature oil pump and the described sleeve pipe;
Screen casing, its heel end and described casing shoe are tightly connected, and it is stifled that its toe-end is fixedly connected with an end;
The combined type internal lining pipe is connected to form by two sections coiled tubings, and wherein the first paragraph internal lining pipe is positioned at casing shoe, and its external diameter is less than described screen casing internal diameter; Its second segment internal lining pipe extends to described screen casing toe-end, and its external diameter is less than the internal diameter of described first paragraph internal lining pipe.
Above-mentioned SAGD producing well mechanical lift process pipe string, wherein, described first paragraph internal lining pipe and second segment internal lining pipe equal in length, and by the connection of bushing pipe box cupling, the external diameter of described first paragraph internal lining pipe is above-mentioned screen casing internal diameter 2/3; The external diameter of described second segment internal lining pipe is 1/2 of screen casing internal diameter.
Above-mentioned SAGD producing well mechanical lift process pipe string, wherein, described screen casing is cutting seam sieve tube.
Above-mentioned SAGD producing well mechanical lift process pipe string, wherein, described screen casing is tightly connected via a screen casing sealed suspension device and described casing shoe.
Above-mentioned SAGD producing well mechanical lift process pipe string, wherein, described combined type internal lining pipe is arranged at screen casing inside.
Above-mentioned SAGD producing well mechanical lift process pipe string, wherein, described combined type internal lining pipe first paragraph is tightly connected via an internal lining pipe sealed suspension device and described casing shoe.
Above-mentioned SAGD producing well mechanical lift process pipe string, wherein, described screen casing sealed suspension device is positioned at the rear end of internal lining pipe sealed suspension device, both lateral separation 20cm.
Above-mentioned SAGD producing well mechanical lift process pipe string, wherein, it is oil rig or actuating unit that the thermal production well mouth top of described wellhead assembly is provided with extracting device of oil, when the mechanical lift pump is rod-type pumping unit, described extracting device of oil is oil rig, when the mechanical lift pump is screw pump, described extracting device of oil is actuating unit.
Above-mentioned SAGD producing well mechanical lift process pipe string, wherein, described casing diameter is 11 ", described first paragraph internal lining pipe diameter is 6 ", described second segment internal lining pipe diameter is
", described screen casing diameter is 9, and " and length is 450m.
Learnt that by above explanation the utility model can reach following effect compared with prior art really:
A kind of SAGD producing well mechanical lift process pipe string of the present utility model, it adopts and be lowered to the combined type internal lining pipe in screen casing, change the liquid flow path direction of screen casing Produced Liquid, after fluid flows into outside screen casing, enter the combined type internal lining pipe, enter oil well pump via the combined type internal lining pipe again, by increasing the Produced Liquid flow path, can effectively reduce the Produced Liquid temperature, balance screen casing each point Produced Liquid flowing pressure is conducive to the balanced fluid of screen casing, reduces the shaft bottom flash distillation that causes because of pressure oscillation, also effectively avoided without under the internal lining pipe condition simultaneously, the excessive heel end vapour that causes of the screen casing heel end liquid outlet quantity nearer apart from oil well pump is altered.
By adopting the combined type internal lining pipe, dwindle second segment internal lining pipe diameter, effectively increased the annular space sectional area of screen casing toe-end, reduced the flow resistance that fluid that the screen casing heel end enters flows into screen casing toe-end annular space, the liquid outlet quantity that is conducive to balance screen casing heel end and screen casing toe-end has been avoided under the internal lining pipe condition of common single size, and it is excessive that the fluid that the screen casing heel end flows into enters the flow resistance of screen casing toe-end annular space, cause the preferential fluid of screen casing toe-end, aggravation screen casing toe-end vapour is altered risk.Therefore, adopt tubular column structure of the present utility model, be conducive to the even fluid of horizontal segment, reduce vapour and alter, improve well yield.
Description of drawings
Fig. 1 is the structural representation of SAGD producing well mechanical lift process pipe string of the present utility model preferred embodiment.
The critical element label declaration:
1: thermal production well mouth 2: cover sluice valve 3: oil well pump sealing and suspension arrangement
4: sleeve pipe 5: oil well pump 6: internal lining pipe sealed suspension device
7: screen casing 8: first paragraph internal lining pipe 9: the second segment internal lining pipe
10: the end stifled 11: screen casing sealed suspension device 12: internal lining pipe box cupling
The specific embodiment
A kind of SAGD producing well mechanical lift process pipe string, wherein, this process pipe string comprises: thermal production well mouth, sleeve pipe, high-temperature oil pump, screen casing and combined type internal lining pipe; Thermal production well mouth comprises an oil well pump, sealing and suspension arrangement, sleeve pipe and gate valve, and this thermal production well mouth top is provided with extracting device of oil; Cannula tip and described wellhead assembly are tightly connected; High-temperature oil pump top and described wellhead assembly are tightly connected, and hang on described inside pipe casing centre position, form the oil recovery annular space between this high-temperature oil pump and the described sleeve pipe; Screen casing heel end and described casing shoe are tightly connected, and it is stifled that its toe-end is fixedly connected with an end; The combined type internal lining pipe is connected to form by two sections coiled tubings, and wherein the first paragraph internal lining pipe is positioned at casing shoe, and its external diameter is less than described screen casing internal diameter; Its second segment internal lining pipe extends to described screen casing toe-end, and its external diameter is less than the internal diameter of described first paragraph internal lining pipe.
Understand for technical characterictic of the present utility model, purpose and effect being had more clearly, now contrast the description of drawings specific embodiment of the present utility model.
As shown in Figure 1, structural representation for a kind of SAGD producing well mechanical lift process pipe string of the present utility model preferred embodiment, better, this SAGD producing well mechanical lift process pipe string comprises: thermal production well mouth 1, sleeve pipe 4, oil well pump 5, screen casing 7 and combined type internal lining pipe.Thermal production well mouth 1 comprises an oil well pump 5, sealing and suspension arrangement 3, sleeve pipe 4 and gate valve 2, and this thermal production well mouth 1 top is provided with extracting device of oil; Sleeve pipe 4 tops and described thermal production well mouth 1 are tightly connected; High-temperature oil pump 5 tops and described thermal production well mouth 1 are tightly connected, and hang on described sleeve pipe 4 bosom positions, form the oil recovery annular space between this high-temperature oil pump 5 and the described sleeve pipe 4; Screen casing 7 heel ends are connected with described sleeve pipe 4 bottom end seal, and its toe-end is fixedly connected with an end stifled 10; The combined type internal lining pipe is connected to form by two sections coiled tubings, and the first paragraph internal lining pipe 8 of combined type internal lining pipe is positioned at sleeve pipe 4 bottoms, and its external diameter is less than the internal diameter of screen casing 7; Its second segment internal lining pipe 9 extends described screen casing 7 toe-ends, and its external diameter is less than the internal diameter of described first paragraph internal lining pipe.
By adopting the combined type internal lining pipe, dwindle second segment internal lining pipe diameter, effectively increased the annular space sectional area of screen casing toe-end, reduced the flow resistance that fluid that the screen casing heel end enters flows into screen casing toe-end annular space, the liquid outlet quantity that is conducive to balance screen casing heel end and screen casing toe-end has been avoided under the internal lining pipe condition of common single size, and it is excessive that the fluid that the screen casing heel end flows into enters the flow resistance of screen casing toe-end annular space, cause the preferential fluid of screen casing toe-end, aggravation screen casing toe-end vapour is altered risk.
As shown in the figure, SAGD producing well mechanical lift process pipe string of the present utility model, better, its first paragraph internal lining pipe and second segment internal lining pipe equal in length, and by the connection of bushing pipe box cupling, the external diameter of described first paragraph internal lining pipe is above-mentioned screen casing internal diameter 2/3; The external diameter of described second segment internal lining pipe is 1/2 of screen casing internal diameter.
Wherein, in the preferred embodiment of SAGD producing well mechanical lift process pipe string of the present utility model, described screen casing 7 is cutting seam sieve tube.
Further, described screen casing 7 is connected with described sleeve pipe 4 bottom end seal via a screen casing sealed suspension device 11.In addition, described combined type internal lining pipe is positioned at screen casing 7 inside.Thereby change the liquid flow path direction of screen casing Produced Liquid, after fluid flows into outside screen casing, enter the combined type internal lining pipe, enter oil well pump via the combined type internal lining pipe again, by increasing the Produced Liquid flow path, can effectively reduce the Produced Liquid temperature, balance screen casing each point Produced Liquid flowing pressure is conducive to the balanced fluid of screen casing, reduces the shaft bottom flash distillation that causes because of pressure oscillation, also effectively avoided without under the internal lining pipe condition simultaneously, the excessive heel end vapour that causes of the screen casing heel end liquid outlet quantity nearer apart from oil well pump is altered.
Better, described combined type internal lining pipe first paragraph 8 is connected with described sleeve pipe 4 bottom end seal via an internal lining pipe sealed suspension device 6; Wherein, more excellent is that described screen casing sealed suspension device 11 is positioned at the rear end of internal lining pipe sealed suspension device 6, both lateral separation 20cm.Annular space and described inside pipe casing between screen casing and the combined type internal lining pipe are isolated mutually.
In the better embodiment of the utility model, oil well pump 5 sealings of described thermal production well mouth 1 are provided with extracting device of oil with suspension arrangement 3 tops, particularly, be rod-type pumping unit 5 for the mechanical lift pump, then thermal production well mouth 1 top is provided with oil rig, be screw pump for the mechanical lift pump, then thermal production well mouth 1 top is provided with actuating unit.
More specifically, the SAGD producing well mechanical lift process pipe string in above-described embodiment, the better enforcement size of one is as follows:
Of the present utility model a kind of SAGD producing well mechanical lift process pipe string in sum, it adopts and be lowered to the combined type internal lining pipe in screen casing 7, change the liquid flow path direction of screen casing 7 Produced Liquids, fluid is after screen casing 7 outer inflows, enter the combined type internal lining pipe, enter oil well pump 5 via the combined type internal lining pipe again, by increasing the Produced Liquid flow path, can effectively reduce the Produced Liquid temperature, balance screen casing 7 each point Produced Liquid flowing pressures are conducive to screen casing 7 balanced fluids, reduce the shaft bottom flash distillation that causes because of pressure oscillation, also effectively avoided without under the internal lining pipe condition simultaneously, altered apart from the excessive heel end vapour that causes of screen casing 7 heel end liquid outlet quantity that oil well pump is nearer.By adopting the combined type internal lining pipe, dwindle second segment internal lining pipe 9 diameters, effectively increased the annular space sectional area of screen casing 7 toe-ends, reduced the flow resistance that fluid that screen casing 7 heel ends enter flows into screen casing 7 toe-end annular spaces, the liquid outlet quantity that is conducive to balance screen casing 7 heel ends and screen casing 7 toe-ends has been avoided under the internal lining pipe condition of common single size, and it is excessive that the fluid that screen casing 7 heel ends flow into enters the flow resistance of screen casing 7 toe-end annular spaces, cause the preferential fluid of screen casing 7 toe-ends, aggravation screen casing 7 toe-end vapour are altered risk.Therefore, adopt tubular column structure of the present utility model, be conducive to the even fluid of horizontal segment, reduce vapour and alter, improve well yield.
The above only is the schematic specific embodiment of the utility model, is not to limit scope of the present utility model.Any those skilled in the art, the equivalent variations of having done under the prerequisite that does not break away from design of the present utility model and principle and modification all should belong to the scope that the utility model is protected.
Claims (9)
1. SAGD producing well mechanical lift process pipe string is characterized in that this process pipe string comprises:
Thermal production well mouth, it comprises an oil well pump, sealing and suspension arrangement, sleeve pipe and gate valve, this thermal production well mouth top is provided with extracting device of oil;
Sleeve pipe, its top and described wellhead assembly are tightly connected;
High-temperature oil pump, its top and described wellhead assembly are tightly connected, and hang on described inside pipe casing centre position, form the oil recovery annular space between this high-temperature oil pump and the described sleeve pipe;
Screen casing, its heel end and described casing shoe are tightly connected, and it is stifled that its toe-end is fixedly connected with an end;
The combined type internal lining pipe is connected to form by two sections coiled tubings, and wherein the first paragraph internal lining pipe is positioned at casing shoe, and its external diameter is less than described screen casing internal diameter; Its second segment internal lining pipe extends to described screen casing toe-end, and its external diameter is less than the internal diameter of described first paragraph internal lining pipe.
2. SAGD producing well mechanical lift process pipe string as claimed in claim 1 is characterized in that, described first paragraph internal lining pipe and second segment internal lining pipe equal in length, and by the connection of bushing pipe box cupling, the external diameter of described first paragraph internal lining pipe is above-mentioned screen casing internal diameter 2/3; The external diameter of described second segment internal lining pipe is 1/2 of screen casing internal diameter.
3. SAGD producing well mechanical lift process pipe string as claimed in claim 1 is characterized in that described screen casing is cutting seam sieve tube.
4. SAGD producing well mechanical lift process pipe string as claimed in claim 1 is characterized in that described screen casing is tightly connected via a screen casing sealed suspension device and described casing shoe.
5. SAGD producing well mechanical lift process pipe string as claimed in claim 1 is characterized in that described combined type internal lining pipe is arranged at screen casing inside.
6. SAGD producing well mechanical lift process pipe string as claimed in claim 4 is characterized in that, described combined type internal lining pipe first paragraph is tightly connected via an internal lining pipe sealed suspension device and described casing shoe.
7. SAGD producing well mechanical lift process pipe string as claimed in claim 6 is characterized in that described screen casing sealed suspension device is positioned at the rear end of internal lining pipe sealed suspension device, both lateral separation 20cm.
8. SAGD producing well mechanical lift process pipe string as claimed in claim 1, it is characterized in that, it is oil rig or actuating unit that the thermal production well mouth top of described wellhead assembly is provided with extracting device of oil, when the mechanical lift pump is rod-type pumping unit, described extracting device of oil is oil rig, when the mechanical lift pump is screw pump, described extracting device of oil is actuating unit.
9. SAGD producing well mechanical lift process pipe string as claimed in claim 1 is characterized in that described casing diameter is 11 ", described first paragraph internal lining pipe diameter is 6 ", described second segment internal lining pipe diameter is
Described screen casing diameter is 9, and " and length is 450m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220405778 CN202810815U (en) | 2012-08-15 | 2012-08-15 | Mechanical lifting process pipe column for SAGD production well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220405778 CN202810815U (en) | 2012-08-15 | 2012-08-15 | Mechanical lifting process pipe column for SAGD production well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202810815U true CN202810815U (en) | 2013-03-20 |
Family
ID=47869713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220405778 Expired - Fee Related CN202810815U (en) | 2012-08-15 | 2012-08-15 | Mechanical lifting process pipe column for SAGD production well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202810815U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775044A (en) * | 2013-08-15 | 2014-05-07 | 中国石油天然气股份有限公司 | Tubular column for treating steam channeling at front end of SAGD injection and production horizontal well and process method |
| CN105986794A (en) * | 2015-03-05 | 2016-10-05 | 中国石油天然气股份有限公司 | Oil extraction method of SAGD (steam assisted gravity drainage) double horizontal well and tubular column equipment thereof |
-
2012
- 2012-08-15 CN CN 201220405778 patent/CN202810815U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775044A (en) * | 2013-08-15 | 2014-05-07 | 中国石油天然气股份有限公司 | Tubular column for treating steam channeling at front end of SAGD injection and production horizontal well and process method |
| CN103775044B (en) * | 2013-08-15 | 2017-05-10 | 中国石油天然气股份有限公司 | Tubular column for treating steam channeling at front end of SAGD injection and production horizontal well and process method |
| CN105986794A (en) * | 2015-03-05 | 2016-10-05 | 中国石油天然气股份有限公司 | Oil extraction method of SAGD (steam assisted gravity drainage) double horizontal well and tubular column equipment thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202165055U (en) | Same-well underground oil-water separating extraction and injection device with surface driving single-screw pump | |
| CN103615199A (en) | Three-pipe same-well-barrel oil extraction process equipment for steam injection, oil extraction and temperature and pressure real-time monitoring of horizontal well | |
| CN203285416U (en) | Downhole oil-water separation device of double electric submersible pump | |
| CN201810286U (en) | Separate mining mixed pumping pipe column suitable for two-layer mining | |
| CN103696744B (en) | Three stage layered commingled columns | |
| CN202914058U (en) | Concentric double-oil-pipe steam distribution injection process pipe column of SAGD steam injection well | |
| CN204941480U (en) | The horizontal well completion sleeve pipe of segmentation exploitation and the tubing string of formation thereof can be realized | |
| CN202810815U (en) | Mechanical lifting process pipe column for SAGD production well | |
| CN202832453U (en) | SAGD production well single oil pipe pump draws technology tubular column | |
| CN201915930U (en) | Tee joint special for thermal recovery | |
| CN206581934U (en) | A kind of horizontal well bore hole screen casing damage testing tubing string | |
| CN108442916A (en) | Horizontal well bore hole screen casing damage testing tubing string | |
| CN202914059U (en) | Steam injection distributing process pipe column of SAGD steam injection well | |
| CN208966249U (en) | A kind of compact coaxial double-pipe injection-production well mouth device | |
| CN201225114Y (en) | Downhole hydraulic self-sealing flexible plunger seal oil conduit type well head seal device | |
| CN203114258U (en) | Three-level layered commingling pipe column | |
| CN101343992B (en) | Horizontal well drillable quartz sand filter tube sand-prevention assorted column jacket | |
| CN203403866U (en) | Integrated oil production technology tubular column | |
| CN104033141A (en) | Deep thickened oil segmental thermal insulating steam injection technique pipe column | |
| CN103122760A (en) | Completion pipe string for suspending bottom water coning | |
| CN202451126U (en) | High-temperature injection-production integrated process pipe column for J-shaped well | |
| CN203516026U (en) | Bridge-crossing type inverted pull-down pump | |
| CN101614202B (en) | Double-deck defueling pump | |
| CN101215960A (en) | Light well head device for single well production | |
| CN202338312U (en) | Gravity drainage auxiliary oil production system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130320 Termination date: 20210815 |