CN206309345U - Wax control tubing string - Google Patents
Wax control tubing string Download PDFInfo
- Publication number
- CN206309345U CN206309345U CN201621282727.4U CN201621282727U CN206309345U CN 206309345 U CN206309345 U CN 206309345U CN 201621282727 U CN201621282727 U CN 201621282727U CN 206309345 U CN206309345 U CN 206309345U
- Authority
- CN
- China
- Prior art keywords
- oil
- gas pipe
- gas
- pipe
- wax
- 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.)
- Active
Links
Landscapes
- Pipeline Systems (AREA)
Abstract
The utility model provides a kind of wax control tubing string, including at least three Oil/Gas Pipes, packer and heaters；The caliber of Oil/Gas Pipe, and be arranged successively along oil gas pipe well, in per adjacent two Oil/Gas Pipes, the bottom of the caliber minimum Oil/Gas Pipe highly be higher than the bottom of the Oil/Gas Pipe adjacent thereto highly, and it is provided with packer between every adjacent two Oil/Gas Pipes, so that the oil gas in oil gas pipe well is flowed into the minimum Oil/Gas Pipe of caliber in flowing, successively；Heater is arranged in the annular space on the outside of the minimum Oil/Gas Pipe of caliber, with the oil-gas heating in the Oil/Gas Pipe minimum to flowing into caliber.Therefore, the utility model can improve the temperature of flow velocity and Oil/Gas Pipe of the oil gas inside Oil/Gas Pipe, weaken tube wall Wax Sediment Velocity；Improve well control safety；It is capable of achieving real-time control or program automatically adjusts Oil/Gas Pipe internal temperature, is prevented effectively from the generation of wax and hydrate, it is ensured that the Oil/gas Well of the gas of wax containing high pressure meets Production requirement steady in a long-term.
Description
Technical field
The utility model is related to oil and gas exploitation technology, more particularly to a kind of wax control tubing string.
Background technology
In the recovery process of high-pressure oil-gas well, there is thermograde in oil gas well casing, and the temperature near the mouth of pipe is less than oil gas
The temperature of well casing bottom, the wax gas in petroleum gas is deposited on the pipe string internal wall near the mouth of pipe, shape during outflow, easily
Into wax deposit layer.Meanwhile, wax deposit layer causes gas stream prompt drop low, in the environment of oil gas well casing internal high pressure low temperature, induces
Form hydrate layer.Both cause the normal productive process of oil gas pipe well to be obstructed at collective effect.
At present, solve the problems, such as method that the paraffin blockage of content of wax gas production process mainly uses to add wax-proofing agent and machinery both at home and abroad
Wax removal.Wherein plus wax control agent method be judge oil gas pipe well inwall formed wax deposit layer when, be added to wax-proofing agent, pass through
Chemical solution wax is acted on, and the solid state wax of deposition is changed into flowable liquid wax, completes wax removal process.Mechanical paraffin removal is periodically to adopt
Deposited wax layer is cleared up with paraffin scraper or paraffin bit.
But conventional wax-preventing method is primarily present problems with：1) in wax-proofing agent method is added, the hydrate for being formed is induced
Wax-proofing agent can be caused can not effectively be contacted with wax deposit layer, therefore wax control result is substantially reduced；2) exist in mechanical paraffin removal clear
Manage the problem at dead angle, it is impossible to the wax deposit cleared up completely at the drift angle or cambered surface of flow string, clean halfway wax layer to pipe
Column wall damages larger, and mechanical paraffin removal has security risk higher in hyperbar Oil/gas Well, so method is also unsuitable
Promote.
Utility model content
The utility model provides a kind of wax control tubing string and can improve the temperature of flow velocity and Oil/Gas Pipe of the oil gas inside Oil/Gas Pipe
Degree, weakens tube wall Wax Sediment Velocity；Improve well control safety；Realize that real-time control or program automatically adjust Oil/Gas Pipe internal temperature,
It is prevented effectively from the generation of wax and hydrate, it is ensured that the Oil/gas Well of the gas of wax containing high pressure meets Production requirement steady in a long-term.
The wax control tubing string that the utility model is provided, including at least three Oil/Gas Pipes, packer and heaters.
The caliber of Oil/Gas Pipe, and be arranged successively along oil gas pipe well, in every adjacent two Oil/Gas Pipes, the minimum institute of caliber
State the bottom of Oil/Gas Pipe highly higher than the Oil/Gas Pipe adjacent thereto bottom highly, and per adjacent two Oil/Gas Pipes between set
Packer is equipped with, so that the oil gas in oil gas pipe well is flowed into the minimum Oil/Gas Pipe of caliber in flowing, successively.
Heater is arranged in the annular space on the outside of the minimum Oil/Gas Pipe of caliber, with the Oil/Gas Pipe minimum to flowing into caliber
Oil-gas heating.
In above-mentioned wax control tubing string, it is preferred that at least three Oil/Gas Pipes include：First Oil/Gas Pipe, the second Oil/Gas Pipe
With the 3rd Oil/Gas Pipe.
First Oil/Gas Pipe is installed in oil gas pipe well, and the second Oil/Gas Pipe is arranged with the first oil pipe, and the 3rd Oil/Gas Pipe is fixed
It is set in the second Oil/Gas Pipe.
In above-mentioned wax control tubing string, it is preferred that heater includes heating cable, heating cable is located at the second oil gas
In annular space between the Oil/Gas Pipes of Guan Yu tri-.
In above-mentioned wax control tubing string, it is preferred that heater also includes：Heat-conducting medium, heat conducting medium filling is
In annular space between two Oil/Gas Pipes and the 3rd Oil/Gas Pipe.
In above-mentioned wax control tubing string, it is preferred that also include：Control panel, control panel and heating cable connection, use
In the heating-up temperature of control heating cable.
In above-mentioned wax control tubing string, it is preferred that the upper end mouth of pipe of the second Oil/Gas Pipe and the upper pipes of the 3rd Oil/Gas Pipe
Mouth is fixed by hanger.
In above-mentioned wax control tubing string, it is preferred that the upper end mouth of pipe of each Oil/Gas Pipe is equipped with valve, for controlling oil
The opening and closing of annular space between Oil/Gas Pipe on the inside of tracheae and Oil/Gas Pipe.
In above-mentioned wax control tubing string, it is preferred that be additionally provided with flat gate valve on the 3rd Oil/Gas Pipe, for controlling the 3rd oil
The opening and closing of tracheae.
In above-mentioned wax control tubing string, it is preferred that the annular space inside filling between the first Oil/Gas Pipe and the second Oil/Gas Pipe
There is annular protective liquid.
In above-mentioned wax control tubing string, it is preferred that the upper end mouth of pipe of the 3rd Oil/Gas Pipe is additionally provided with double ram type preventer.
The wax control tubing string that the utility model is provided can be carried by setting the Oil/Gas Pipe that caliber is sequentially reduced when oil gas passes through
Its flow velocity inside Oil/Gas Pipe high, by setting heater in the annular space on the outside of the minimum Oil/Gas Pipe of caliber, controls it
Middle temperature, by improving wax gas velocity and temperature, weakens the speed of tube wall wax deposit higher than conventional wax deposition point temperature；By
The upper end mouth of pipe of the 3rd Oil/Gas Pipe sets valve, double ram type preventer and flat gate valve, and three works and improves well control safety simultaneously；
The work of heater is controlled by control panel, real-time control is capable of achieving or program is automatically adjusted Oil/Gas Pipe internal temperature, had
Effect avoids the generation of wax and hydrate, it is ensured that the Oil/gas Well of the gas of wax containing high pressure meets Production requirement steady in a long-term.
Brief description of the drawings
Fig. 1 is the structural representation of the wax control tubing string that the utility model is provided.
Description of reference numerals：
1- Oil/Gas Pipes；2- packers；3- annular spaces；
4- heats cable；5- control panels；6- hangers；
7- valves；8- flat gate valves；9- double ram type preventers；
The Oil/Gas Pipes of 11- first；The Oil/Gas Pipes of 12- second；The Oil/Gas Pipes of 13- the 3rd.
Specific embodiment
Fig. 1 is the structural representation of the wax control tubing string that the utility model is provided.As shown in figure 1, what the utility model was provided
Wax control tubing string, including at least three Oil/Gas Pipes 1, packer and heater.
The caliber of Oil/Gas Pipe 1, and be arranged successively along oil gas pipe well, in every adjacent two Oil/Gas Pipes 1, caliber minimum
The bottom of the Oil/Gas Pipe 1 highly higher than the Oil/Gas Pipe 1 adjacent thereto bottom highly, and per adjacent two Oil/Gas Pipes 1
Between be provided with packer so that oil gas in oil gas pipe well is in flowing, flow into successively in the minimum Oil/Gas Pipe 1 of caliber.
Heater is arranged in the annular space 3 in the minimum outside of Oil/Gas Pipe 1 of caliber, with the Oil/Gas Pipe minimum to flowing into caliber
Oil-gas heating in 1.
Preferably, at least three Oil/Gas Pipes 1 include：First Oil/Gas Pipe 11, the second Oil/Gas Pipe 12 and the 3rd Oil/Gas Pipe 13.
First Oil/Gas Pipe 11 is installed in oil gas pipe well, and the second Oil/Gas Pipe 12, the 3rd Oil/Gas Pipe are arranged with the first oil pipe
13 fixations are set in the second Oil/Gas Pipe 12.
It should be noted that the wax control tubing string includes the Oil/Gas Pipe 1 of at least three, according to the descending order of caliber by
It is outer to be arranged successively in, the bottom of outside Oil/Gas Pipe 1 highly higher than inner side Oil/Gas Pipe 1 bottom highly, it is ensured that outside oil gas is flowed through
Flowed into inside the Oil/Gas Pipe 1 of inner side from the bottom of inner side Oil/Gas Pipe 1 after side Oil/Gas Pipe 1, oil gas is flowed by the larger Oil/Gas Pipe 1 of caliber
To the less Oil/Gas Pipe 1 of caliber, caliber is stepped to be gradually reduced, and can increase flow velocity of the oil gas in Oil/Gas Pipe 1, so as to reduce wax
The speed that gas is deposited in the inwall of Oil/Gas Pipe 1.
Heater is provided with the annular space 3 in the minimum outside of Oil/Gas Pipe 1 of caliber, by heater to minimum pipe
The heating of the tube wall of Oil/Gas Pipe 1, make its internal temperature be higher than conventional 5 DEG C of wax deposition point temperature, it is ensured that oil gas during outflow, wax
Gas will not condense, and block pipeline and damage tube wall.Wherein, annular space 3 refers to during drilling completion, in order to separate different ground
Matter series of strata, prevent strata pressure difference from causing cave-in, it usually needs set multilayer sleeve well cementation, and every layer of effective cement of set is consolidated
Well, each layer sleeve pipe certain difference because caliber has, can form the annular space with a constant volume between it, the annular space is
It is annular space 3.
In embodiment of the present utility model by taking three Oil/Gas Pipes 1 as an example, respectively the first Oil/Gas Pipe 11, the second Oil/Gas Pipe 12
With the 3rd Oil/Gas Pipe 13, the first Oil/Gas Pipe 11, in outermost, is sleeve pipe, the borehole wall for supporting oil gas pipe well, to ensure drilling well
Process carries out the normal operation with whole oil gas pipe well after completion.In actual production process, can as needed increase and decrease Oil/Gas Pipe 1
Quantity.The bottom of the first Oil/Gas Pipe 11, the second Oil/Gas Pipe 12 and the 3rd Oil/Gas Pipe 13 is highly sequentially reduced, and caliber is sequentially reduced.
Oil gas flowing after flow through the first Oil/Gas Pipe 11 and the second Oil/Gas Pipe 12 successively, by the 3rd Oil/Gas Pipe 13 the mouth of pipe flow out, caliber according to
Secondary reduction, oil gas flow velocity is continuously increased.
Preferably, heater includes heating cable 4, and heating cable 4 is located at the second Oil/Gas Pipe 12 and the 3rd Oil/Gas Pipe 13
Between annular space 3 in.
It should be noted that heating cable 4 is arranged in the annular space 3 between the second Oil/Gas Pipe 12 and the 3rd Oil/Gas Pipe 13,
It is mainly used in heating the 3rd Oil/Gas Pipe 13, waste heat is propagated in the second Oil/Gas Pipe 12 and the first Oil/Gas Pipe 11 so that the first oil
Tracheae 11, the second Oil/Gas Pipe 12 and the internal temperature of the 3rd Oil/Gas Pipe 13 are raised successively, weaken deposition speed of the wax gas inside tube wall
Rate.Heating cable 4 is led using single or many heating alloy as pyrotoxin, high-purity, high temperature, electric smelting crystal magnesium oxide
Heat insulator, seamless continuous stainless steel or copper pipe are fabricated by as sheath using special producing technique.For containing in oil gas
Deep-etching material, can also be in the outside addition polymerization ethene of heating cable 4 or the overcoat of low smoke and zero halogen.
Preferably, heater also includes：Heat-conducting medium, heat conducting medium filling is in the second Oil/Gas Pipe 12 and the 3rd Oil/Gas Pipe
In annular space 3 between 13.
It should be noted that being also filled with heat conduction inside annular space 3 between the second Oil/Gas Pipe 12 and the 3rd Oil/Gas Pipe 13
Medium, heat conductivility is increased for reducing thermal resistance, the heat of heating cable 4 is farthest transferred to the 3rd Oil/Gas Pipe 13.
Heat-conducting medium is preferably used close including heat-conducting silica gel sheet, heat-conducting silicone grease, bond plies and heat conduction silicone oil etc. in the utility model
Spend the mixture of the petroleum derivative based on less aromatic compound.
Preferably, above-mentioned wax control tubing string also includes：Control panel 5, control panel 5 is connected with heating cable 4, for controlling
The heating-up temperature of system heating cable 4.
It should be noted that control panel 5 is used for real-time monitoring and feedback regulation heats the heating-up temperature of cable 4, it is ensured that
Heating-up temperature is higher than 5 DEG C of wax deposition point temperature, and analyzes the real-time temperature values of feedback, by regulating and controlling the performance number of heating cable 4, from
And adjust heating-up temperature value.The control panel 5 is available for staff's real-time regulation, can also be entered by setting heating and thermal insulation program
Row is automatically controlled.
Preferably, the upper end mouth of pipe of the upper end mouth of pipe of the second Oil/Gas Pipe 12 and the 3rd Oil/Gas Pipe 13 is solid by hanger 6
It is fixed.
It should be noted that the second Oil/Gas Pipe 12 and the 3rd Oil/Gas Pipe 13 are individually fixed in the first oil by hanger 6
The nozzle position of the Oil/Gas Pipe 12 of tracheae 11 and second, it is ensured that the first Oil/Gas Pipe 11 and the second Oil/Gas Pipe 12, the He of the second Oil/Gas Pipe 12
The annular space 3 of a constant volume is respectively formed between 3rd Oil/Gas Pipe 13.Hanger 6 mainly includes that slip-type hanger and mandrel type hang
Device, can select according to needs of production.
Preferably, the upper end mouth of pipe of each Oil/Gas Pipe 1 is equipped with valve 7, for controlling Oil/Gas Pipe 1 with the inner side of Oil/Gas Pipe 1
Oil/Gas Pipe 1 between annular space 3 opening and closing.
It should be noted that the upper end mouth of pipe of each Oil/Gas Pipe 1 is respectively provided with valve 7, the mouth of pipe valve 7 of the first Oil/Gas Pipe 11 is main
For controlling the annular space 3 between the first Oil/Gas Pipe 11 and the second Oil/Gas Pipe 12 to be opened and closed.The mouth of pipe valve 7 of the second Oil/Gas Pipe 12 is main
For controlling the annular space 3 between the second Oil/Gas Pipe 12 and the 3rd Oil/Gas Pipe 13 to be opened and closed, the mouth of pipe of valve 7 is additionally operable to addition heat conduction and is situated between
Matter.Oil gas is flowed out by the mouth of pipe of the 3rd Oil/Gas Pipe 13, and the mouth of pipe valve 7 of the 3rd Oil/Gas Pipe 13 can be used to control the outflow of oil gas.
Preferably, flat gate valve 8 is additionally provided with the 3rd Oil/Gas Pipe 13, the opening and closing for controlling the 3rd Oil/Gas Pipe 13.
It should be noted that the mouth of pipe of the 3rd Oil/Gas Pipe 13 is additionally provided with flat gate valve 8, it is that a kind of closure member is parallel lock
The slide-valve of plate, the outflow for controlling oil gas.
Preferably, the inside of annular space 3 between the first Oil/Gas Pipe 11 and the second Oil/Gas Pipe 12 is filled with annular protective liquid.
It should be noted that annular protective liquid is filled with inside the annular space 3 of the first Oil/Gas Pipe 11 and the second Oil/Gas Pipe 12,
Due to the first Oil/Gas Pipe 11 it is fixed with oil gas pipe well in, have substantial amounts of high-pressure oil gas in oil gas pipe well, and in Oil/Gas Pipe 1, oil
Gas is constantly flowed outwardly, therefore its internal pressure, less than the pressure in oil gas pipe well, pressure difference value between the two can damage oil gas
The tube wall of pipe 1, causes leakage.And after being filled with annular protective liquid, annular protective liquid is varied with temperature and expanded with heat and contract with cold, so as to adjust
The pressure value inside the annular space 3 of the first Oil/Gas Pipe 11 and the second Oil/Gas Pipe 12 is saved, the pressure in making it with oil gas pipe well reaches flat
Weighing apparatus.In addition annular protective liquid can also protect the tube wall of Oil/Gas Pipe 1 not damaged by corrosive deposit in oil gas.
Preferably, the upper end mouth of pipe of the 3rd Oil/Gas Pipe 13 is additionally provided with double ram type preventer 9.
It should be noted that the upper end mouth of pipe in the 3rd Oil/Gas Pipe 13 is additionally provided with double ram type preventer 9, when the 3rd Oil/Gas Pipe
13 internal pressures are excessive, when there is blowout phenomenon, simultaneously close off the symmetrical flashboard assembly in upper strata, drive both sides ram seal assembly to
Central motion, ram seal glue core holds the tube wall of the 3rd Oil/Gas Pipe 13 tightly simultaneously, realizes the purpose of sealing blowout prevention.
The mouth of pipe valve 7 of the 3rd above-mentioned Oil/Gas Pipe 13, flat gate valve 8 and double flat plate preventer are to the 3rd Oil/Gas Pipe 13
To triple protection effect, well control safety is improve.
The wax control tubing string that the utility model is provided is by setting the Oil/Gas Pipe 1 that caliber is sequentially reduced, the energy when oil gas passes through
Its flow velocity inside Oil/Gas Pipe 1 is improved, heater, control are set by the annular space 3 in the minimum outside of Oil/Gas Pipe 1 of caliber
System wherein temperature, by improving wax gas velocity and temperature, weakens the speed of tube wall wax deposit higher than conventional wax deposition point temperature；It is logical
The upper end mouth of pipe crossed in the 3rd Oil/Gas Pipe 13 sets valve 7, double ram type preventer 9 and flat gate valve 8, and three works raising simultaneously
Well control safety；The work of heater is controlled by control panel 5, real-time control is capable of achieving or program is automatically adjusted Oil/Gas Pipe 1
Internal temperature, is prevented effectively from the generation of wax and hydrate, it is ensured that the Oil/gas Well of the gas of wax containing high pressure meets production need steady in a long-term
Ask.
Finally it should be noted that：Various embodiments above is only used to illustrate the technical solution of the utility model, rather than it is limited
System；Although being described in detail to the utility model with reference to foregoing embodiments, one of ordinary skill in the art should
Understand：It can still modify to the technical scheme described in foregoing embodiments, or to which part or whole
Technical characteristic carries out equivalent；And these modifications or replacement, the essence of appropriate technical solution is departed from this practicality newly
The scope of each embodiment technical scheme of type.
Claims (10)
1. a kind of wax control tubing string, it is characterised in that including at least three Oil/Gas Pipes, packer and heaters；The Oil/Gas Pipe
Caliber, and be arranged successively along oil gas pipe well, per adjacent two Oil/Gas Pipes in, the minimum Oil/Gas Pipe of caliber
Bottom highly higher than the Oil/Gas Pipe adjacent thereto bottom highly, and be provided with envelope per between adjacent two Oil/Gas Pipes
Every device, so that the oil gas in the oil gas pipe well is flowed into the minimum Oil/Gas Pipe of caliber in flowing, successively；
The heater is arranged in the annular space on the outside of the minimum Oil/Gas Pipe of the caliber, with to flowing into the caliber minimum
Oil-gas heating in Oil/Gas Pipe.
2. wax control tubing string according to claim 1, it is characterised in that at least three Oil/Gas Pipe includes：First oil gas
Pipe, the second Oil/Gas Pipe and the 3rd Oil/Gas Pipe；
First Oil/Gas Pipe is installed in oil gas pipe well, and the second Oil/Gas Pipe, the 3rd oil are arranged with first oil pipe
Tracheae is fixed and is set in second Oil/Gas Pipe.
3. wax control tubing string according to claim 2, it is characterised in that the heater includes heating cable, it is described plus
Electric heating cable is located in the annular space between second Oil/Gas Pipe and the 3rd Oil/Gas Pipe.
4. wax control tubing string according to claim 3, it is characterised in that the heater also includes：Heat-conducting medium, it is described
Heat conducting medium filling is in the annular space between second Oil/Gas Pipe and the 3rd Oil/Gas Pipe.
5. wax control tubing string according to claim 3, it is characterised in that also include：Control panel, the control panel and institute
Heating cable connection is stated, the heating-up temperature for controlling the heating cable.
6. the wax control tubing string according to claim any one of 2-5, it is characterised in that the upper end mouth of pipe of second Oil/Gas Pipe
The upper end mouth of pipe with the 3rd Oil/Gas Pipe is fixed by hanger.
7. the wax control tubing string according to claim any one of 2-5, it is characterised in that each upper end mouth of pipe of the Oil/Gas Pipe
Valve is equipped with, the opening and closing for controlling annular space between the Oil/Gas Pipe on the inside of the Oil/Gas Pipe and the Oil/Gas Pipe.
8. the wax control tubing string according to claim any one of 2-5, it is characterised in that be additionally provided with the 3rd Oil/Gas Pipe flat
Plate gate valve, the opening and closing for controlling the 3rd Oil/Gas Pipe.
9. the wax control tubing string according to claim any one of 2-5, it is characterised in that first Oil/Gas Pipe and described second
Annular space inside between Oil/Gas Pipe is filled with annular protective liquid.
10. the wax control tubing string according to claim any one of 2-5, it is characterised in that the upper pipes of the 3rd Oil/Gas Pipe
Mouth is additionally provided with double ram type preventer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621282727.4U CN206309345U (en) | 2016-11-28 | 2016-11-28 | Wax control tubing string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621282727.4U CN206309345U (en) | 2016-11-28 | 2016-11-28 | Wax control tubing string |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206309345U true CN206309345U (en) | 2017-07-07 |
Family
ID=59249433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621282727.4U Active CN206309345U (en) | 2016-11-28 | 2016-11-28 | Wax control tubing string |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206309345U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112727399A (en) * | 2021-03-17 | 2021-04-30 | 克拉玛依胜利高原机械有限公司 | High-pressure pipe column sealing circulating heat tracing wax-proof device and implementation process |
-
2016
- 2016-11-28 CN CN201621282727.4U patent/CN206309345U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112727399A (en) * | 2021-03-17 | 2021-04-30 | 克拉玛依胜利高原机械有限公司 | High-pressure pipe column sealing circulating heat tracing wax-proof device and implementation process |
| CN112727399B (en) * | 2021-03-17 | 2024-05-28 | 克拉玛依胜利高原机械有限公司 | High-pressure pipe column sealing circulation heat tracing wax-preventing device and implementation process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102330546B (en) | Open hole staged fracturing well completion pipe string provided with controllable valve and hydraulic control switching pipe string | |
| US20090283272A1 (en) | Pipeless sagd system and method | |
| CN102287156B (en) | Concentric pipe wellhead device for exploiting thickened oil through steam assisted gravity drainage | |
| CN202531139U (en) | Annulus insulation type hot water drive injection well pipe column of oil field | |
| RU2001101297A (en) | METHOD FOR SIMULTANEOUSLY SEPARATE DEVELOPMENT OF MULTIPLE OPERATING OBJECTS AND A BOREHOLE INSTALLATION FOR ITS IMPLEMENTATION | |
| CN103867172B (en) | Injection-production system and injection-production method | |
| CN102373900A (en) | Staged fracturing well completion method using hydraulic-controlled switch to open/close controllable valves | |
| CN102444396B (en) | A kind of natural gas production method | |
| CN206309345U (en) | Wax control tubing string | |
| CN106968658A (en) | A kind of efficient device for fracturing wellhead | |
| CN203394444U (en) | Fireflood-assisted gravity drainage injection and production technology system | |
| US3160208A (en) | Production well assembly for in situ combustion | |
| CN204419120U (en) | Double hydraulic control eccentric flow control valve | |
| CN205778774U (en) | Completion tubular column | |
| CN109441400B (en) | Device and method for removing and preventing wax of gas lift oil production well | |
| CN105201466A (en) | Automatic downhole stepless throttling device and method | |
| CN204716204U (en) | Digitlization oilfield superconducting hot-washing paraffin-remover | |
| CN201786317U (en) | Super-heavy oil thermal production well oil pipe sealing controller | |
| CN208203251U (en) | Low-permeability oil deposit CO_2 stimulation oil recovery integrated apparatus | |
| CN104879098B (en) | A kind of concentric double pipe gas well liquid loading tubing string | |
| CN202325457U (en) | Naked eye segmented fracturing completion string for placement of controllable valves and liquid control switch string | |
| US20120305259A1 (en) | Annulus vent system for subsea wellhead assembly | |
| CN207686693U (en) | A kind of flow string and device for producing thickened oil | |
| CN203685053U (en) | Horizontal well oil production process equipment with functions of steam injection, oil production and temperature and pressure real-time monitoring and with three tubings in same wellbore | |
| CN106481314A (en) | A kind of straight well completion tubular column |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |