CN212003052U - Oil well layered water plugging and top pressure relief preventing process pipe column - Google Patents
Oil well layered water plugging and top pressure relief preventing process pipe column Download PDFInfo
- Publication number
- CN212003052U CN212003052U CN202020470532.2U CN202020470532U CN212003052U CN 212003052 U CN212003052 U CN 212003052U CN 202020470532 U CN202020470532 U CN 202020470532U CN 212003052 U CN212003052 U CN 212003052U
- Authority
- CN
- China
- Prior art keywords
- pressure relief
- oil
- pressure
- pipe
- pipe column
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 239000003129 oil well Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000008569 process Effects 0.000 title claims abstract description 27
- 230000007246 mechanism Effects 0.000 claims abstract description 20
- 239000012530 fluid Substances 0.000 claims abstract description 8
- 238000005516 engineering process Methods 0.000 claims abstract description 6
- 238000007599 discharging Methods 0.000 claims abstract description 3
- 238000012856 packing Methods 0.000 claims abstract description 3
- 230000005540 biological transmission Effects 0.000 claims description 12
- 230000009471 action Effects 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract description 10
- 238000004891 communication Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 235000020681 well water Nutrition 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model discloses an oil well layering water shutoff prevents top pressure release technology tubular column, including oil pipe, its characterized in that: a bottom limit protection packer is connected below the bottom limit of the perforation of the oil pipe, and an anti-jacking pressure relief mechanism is connected at the lower end of the oil pipe; the bottom boundary protection packer is used for packing an oil sleeve annulus; the anti-ejection pressure relief mechanism is provided with a pressure relief channel; in the lowering process of the pipe column, the pressure relief channel is closed and used for plugging the oil pipe; when the seal of the pipe column is pulled out, the pressure relief channel is opened and is used for circulating the pressure in the well into the oil pipe from the oil sleeve annulus and discharging the well fluid in the oil pipe into the oil sleeve annulus; the problem of the hidden danger of pipe column top-up run-off that appears and oil pipe unloads in the twinkling of an eye and causes liquid to splash and cause the pollution in the current oil well layering water shutoff technology tubular column in the process of pulling out to seal is solved.
Description
Technical Field
The utility model relates to an oil well layering water shutoff tubular column.
Background
In the later development stage of extra-high water content of an oil field, the number and well sections of subdivided water injection and production wells are gradually increased, and when a multistage oil well water plugging pipe column is operated underground, the on-site repeated lifting and releasing of a pipe column grinding rubber sleeve is required to complete deblocking because the packer pulling-out effect is not ideal.
Meanwhile, the liquid splashing event can happen when the ground oil pipe is disconnected due to the influence of the pressure of the liquid column in the pipe column, certain damage is brought to field operation personnel, and environmental pollution is caused to a certain degree.
Disclosure of Invention
In view of this, the utility model provides an oil well layering water shutoff prevents a pressure release technology tubular column solves the tubular column that current oil well layering water shutoff technology tubular column appears pulling out to push up and flies out hidden danger and oil pipe and unloads and cause liquid splash in the twinkling of an eye and cause the problem of pollution.
In order to realize the purpose, the oil well layered water plugging, top prevention and pressure relief process pipe column comprises an oil pipe and is characterized in that:
a bottom limit protection packer is connected below the bottom limit of the perforation of the oil pipe, and an anti-jacking pressure relief mechanism is connected at the lower end of the oil pipe;
the bottom boundary protection packer is used for packing an oil sleeve annulus;
the anti-ejection pressure relief mechanism is provided with a pressure relief channel;
in the lowering process of the pipe column, the pressure relief channel is closed and used for plugging the oil pipe;
when the seal of the pipe column is pulled out, the pressure relief channel is opened and is used for circulating the pressure in the well into the oil pipe through the oil sleeve annulus and discharging the well fluid in the oil pipe into the oil sleeve annulus.
Preferably, the anti-tip pressure relief mechanism comprises:
a pressure transmission valve and a pressure release valve;
the pressure relief channel is arranged on the pressure transmission valve;
the pressure relief valve is used as a switch of the pressure relief channel.
Preferably, the pressure relief channel is at least one round hole;
the circular holes are annularly arranged.
Preferably, the pressure relief valve is fixed in the pressure bearing seat through a pin;
under the action of pressure, the pin is sheared and used for opening the pressure relief channel.
Preferably, the critical shear stress of the pin is more than 1.2 times greater than the setting pressure of the bottom protective packer.
Preferably, the upper end of the pressure bearing seat is connected with the upper connecting sleeve, and the lower end of the pressure bearing seat is connected with the lower connecting sleeve;
a pressure transmission valve is clamped and fixed between the pressure bearing seat and the upper connecting sleeve;
the upper end of the upper connecting sleeve is connected with the oil pipe;
the lower end of the lower connecting sleeve is connected with a sieve tube;
the screen pipe is used for screening out the well fluid impurities.
Preferably, an upper joint is connected between the upper connecting sleeve and the oil pipe;
and a lower joint is connected between the lower connecting sleeve and the sieve tube.
The utility model discloses following beneficial effect has:
the utility model discloses oil well layering water shutoff prevents a pressure release technology tubular column has following beneficial effect:
(1) the bottom boundary protection packer and the top-preventing pressure relief mechanism are installed and connected to the lower end of the normal oil well layered water plugging pipe column and are positioned below the bottom boundary of the perforation, so that the top-preventing pressure relief mechanism can be normally opened, and the oil well layered water plugging effect can be normally implemented;
(2) in the process of lowering the tubular column into the well, the anti-jacking pressure relief mechanism is matched with a wellhead blowout preventer for use, so that the layered water plugging tubular column and the oil sleeve annulus of the oil well can be sealed simultaneously, and wellhead overflow in the operation process is effectively controlled;
(3) normally lowering the pipe column to a preset position, and positively pressurizing from the oil pipe to release the pressure-bearing tools such as normal water plugging process tools, bottom boundary protection packers and the like in the oil well layered water plugging and top-preventing pressure relief process pipe column and release the pressure-bearing tools and the top-preventing pressure relief mechanism, so that the normal implementation of the oil well layered water plugging effect is realized; after the anti-top pressure relief mechanism is released, normally opening a pressure relief channel of a well section below the sealing part of the bottom boundary protection packer to form communication from the artificial well bottom to the annular position of an oil sleeve of the well section of the bottom boundary protection packer;
(4) in the lifting process of the tubular column, a pressure relief channel of the anti-top pressure relief valve is opened through hydraulic pressure, so that communication is formed in a pocket at the bottom boundary, and further potential safety hazards caused by the fact that the upper top of the tubular column flies out of a well mouth due to pressure accumulation of an oil sleeve-free communication channel at the bottom end of the oil well water plugging tubular column are eliminated;
(5) the bottom protection packer prevents that perforation interval oil jacket annular pressure from getting into and preventing a pressure release tubular column, avoids preventing that pressure-bearing device can't normally release, the relief valve can't open in the pressure release tubular column of preventing a top, and the unable intercommunication of artifical shaft bottom to bottom protection packer well section oil jacket annular position arouses the potential safety hazard that the tubular column liftout well head brought on the top when rising the tubular column.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of the downhole operation of the oil well layered water plugging, top pressure release preventing process pipe column according to the embodiment of the present invention;
fig. 2 is a schematic structural view of the anti-ejection pressure-release mechanism according to the embodiment of the present invention.
Detailed Description
The present invention will be described below based on examples, but it should be noted that the present invention is not limited to these examples. In the following detailed description of the present invention, certain specific details are set forth in detail. However, for parts not described in detail, those skilled in the art can fully understand the present invention.
Furthermore, those skilled in the art will appreciate that the drawings are provided for purposes of illustrating the objects, features, and advantages of the invention and are not necessarily drawn to scale.
Also, unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, the meaning of "includes but is not limited to".
FIG. 1 is a schematic diagram of the downhole operation of the oil well layered water plugging, top pressure release preventing process pipe column according to the embodiment of the present invention; fig. 2 is a schematic structural view of the anti-ejection pressure-release mechanism according to the embodiment of the present invention.
As shown in fig. 1 and fig. 2, the oil well layered water plugging and top pressure relief preventing process pipe column comprises an oil pipe 10, a bottom protective packer 2 connected below a perforation bottom boundary 30 of a casing 20, and a top pressure relief preventing mechanism 3 connected to the lower end of the oil pipe 10; the bottom boundary protection packer 2 has the same structure as a packer used by a common water plugging tubular column and is used for sealing and isolating an oil sleeve annulus; the anti-ejection pressure relief mechanism 3 is provided with a pressure relief channel; in the lowering process of the pipe column 1, the pressure relief channel closes and blocks the oil pipe 10; when the pipe column 1 is pulled out for sealing, the pressure relief channel is opened, the pressure in the well can be circulated to the oil pipe 10 from the oil sleeve annulus, and well fluid in the oil pipe 10 is discharged into the oil sleeve annulus.
In fig. 2, the anti-top pressure relief mechanism 3 comprises a pressure transmission valve 3-3 and a pressure relief valve 3-4; the pressure transmission valve 3-3 is provided with a pressure relief channel, and the pressure relief valve 3-4 is used as a switch of the pressure relief channel.
The pressure release channel is at least one round hole, and these round holes are the annular and arrange, and further, these round holes can be round hole dislocation formula annular and arrange.
In fig. 2, a pressure relief valve 3-4 is fixed in a pressure bearing seat 3-6 through a pin 3-5, and a pressure relief channel can be opened after the pin 3-5 is sheared under the action of pressure.
In fig. 2, the upper end of a pressure bearing seat 3-6 is connected with an upper connecting sleeve 3-2, and the lower end thereof is connected with a lower connecting sleeve 3-7; a pressure transmission valve 3-3 is clamped and fixed between the pressure bearing seat 3-6 and the upper connecting sleeve 3-2; the upper end of the upper connecting sleeve 3-2 is used for connecting an oil pipe 10; the lower ends of the lower connecting sleeves 3-7 are connected with a sieve tube 4; the screen 4 is used to screen out well fluid impurities.
In FIG. 2, an upper joint 3-1 is connected between an upper connecting sleeve 3-2 and an oil pipe 10; a lower joint 3-8 is connected between the lower connecting sleeve 3-7 and the sieve tube 4.
Specifically, the structural design points of the oil well layered water plugging and top pressure release preventing process pipe column of the utility model are explained with reference to the attached drawings 1-2:
when connected, the upper joint 3-1 is connected to the oil pipe 10 at the lower end of the bottom boundary protection packer 30 of the casing 20; when releasing, pressure is transmitted to the pressure release valves 3-4 through pressure transmission holes (namely pressure release channels) in the pressure transmission valves 3-3, pins 3-5 connected with the pressure release valves 3-4 are sheared under the action of pressure shearing, the pressure release valves 3-4 fall to the bottoms of the sieve tubes 4 at the lower ends of the lower joints 3-8, and the oil sleeve annular space outside the sand-proof hole pipe column on the sieve tubes 4 is communicated with the inside of the pipe column to realize pressure transmission, so that the potential safety hazard caused by the fact that the pipe column is jacked up and flies out of a well mouth due to the pressure accumulation of the oil sleeve-free communication channels at the bottom ends of the oil well.
Specifically, the working process and the anti-top pressure release principle of the oil well layered water plugging and anti-top pressure release process pipe column of the utility model are explained with reference to the attached drawings 1-2:
1) setting:
in practical application, the bottom boundary protection packer 2, the top pressure relief prevention mechanism 3 and the sieve tube 4 are connected to the lower end of the oil tube 10 of the oil well layered water plugging pipe column 1 in sequence, and the assembly depth of the bottom boundary protection packer 2 is required to be greater than the bottom boundary 30 of the perforation of the sleeve 20.
After the assembly connection is completed, the oil well layered water plugging, top prevention and pressure relief process pipe column is lowered to a preset depth to form a production pipe column.
And then, the pressure of 15MPa is positively pressed from the oil pipe 10, the pressure is stabilized for 5min, and pressure-bearing tools such as a packer, a production allocator and the like in the production string are normally set and work. And continuously increasing the pressure to 18MPa, shearing the pin 3-5, allowing the pressure release valve 3-4 to fall to the bottom of the sieve tube 4 at the lower end of the lower joint 3-8, and opening a pressure release channel of the anti-jacking pressure release mechanism 3.
2) Deblocking and liquid leakage principle:
when the oil well layered water plugging pipe column 1 needs to be salvaged, a salvage tool is used for salvaging the releasing joint, the oil well layered water plugging pipe column 1 is lifted, and all the packers connected to the oil well layered water plugging pipe column 1 are sequentially unsealed; and the pressure in the well is circulated to the oil pipe 10 from the oil sleeve annulus by the pressure relief channel so as to achieve the purpose of pressure relief, thereby eliminating the potential safety hazard caused by pulling out the seal of the pipe column. Simultaneously, can let out the inside well fluid of oil well layering water shutoff tubular column 1 into the oil jacket annular space through the pressure release passageway, prevent that ground oil pipe from unloading in the twinkling of an eye liquid splashes and causes the pollution.
(3) The principle of preventing top pressure release is as follows:
1) the pressure relief valves 3-4 are matched with a wellhead blowout preventer for use, so that the layered water plugging pipe column 1 and the oil sleeve annulus of the oil well can be sealed simultaneously, and wellhead overflow in the operation process is effectively controlled;
2) after a pressure-bearing tool in the oil well layered water shutoff pipe column 1 is normally released, a pressure relief channel of a pressure-relief valve is opened through hydraulic pressure, so that communication is formed in a bottom pocket, the potential safety hazard caused by plugging out of the oil well layered water shutoff pipe column 1 is eliminated, and the problem of liquid splashing at the moment of opening an oil pipe at a well mouth is solved;
3) the pressure relief channel adopts a circular hole dislocation type annular arrangement design, meets the liquid discharge requirement of the oil well layered water plugging pipe column 1, reduces the discharge of well liquid, and provides a clean and tidy well head operation environment for staff;
4) the pins 3-5 are used as main pressure-bearing elements, the critical shear stress of the pins is designed to be more than 1.2 times greater than the setting pressure of a conventional packer, and a reasonable pressure relief (liquid) channel is provided for secondary operation of the oil well layered water plugging pipe column on the premise that a pressure-bearing tool in the pipe column is normally released.
The above-mentioned embodiments are merely embodiments for expressing the invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several changes, substitutions, modifications, etc. can be made without departing from the spirit of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (7)
1. The utility model provides an oil well layering water shutoff prevents top pressure release technology tubular column, includes oil pipe, its characterized in that:
a bottom limit protection packer is connected below the bottom limit of the perforation of the oil pipe, and an anti-jacking pressure relief mechanism is connected at the lower end of the oil pipe;
the bottom boundary protection packer is used for packing an oil sleeve annulus;
the anti-ejection pressure relief mechanism is provided with a pressure relief channel;
in the lowering process of the pipe column, the pressure relief channel is closed and used for plugging the oil pipe;
when the seal of the pipe column is pulled out, the pressure relief channel is opened and is used for circulating the pressure in the well into the oil pipe through the oil sleeve annulus and discharging the well fluid in the oil pipe into the oil sleeve annulus.
2. The oil well layered water plugging and top pressure relief preventing process pipe column according to claim 1, characterized in that:
prevent a pressure release mechanism includes:
a pressure transmission valve and a pressure release valve;
the pressure relief channel is arranged on the pressure transmission valve;
the pressure relief valve is used as a switch of the pressure relief channel.
3. The oil well layered water plugging and top pressure relief preventing process pipe column as claimed in claim 1 or 2, wherein:
the pressure relief channel is at least one round hole;
the circular holes are annularly arranged.
4. The oil well layered water plugging and top pressure relief preventing process pipe column as claimed in claim 2, wherein:
the pressure release valve is fixed in the pressure bearing seat through a pin;
under the action of pressure, the pin is sheared and used for opening the pressure relief channel.
5. The oil well layered water plugging and top pressure relief preventing process pipe column as claimed in claim 4, wherein:
the critical shear stress of the pin is more than 1.2 times greater than the setting pressure of the bottom protective packer.
6. The oil well layered water plugging and top pressure relief preventing process pipe column as claimed in claim 4, wherein:
the upper end of the pressure bearing seat is connected with the upper connecting sleeve, and the lower end of the pressure bearing seat is connected with the lower connecting sleeve;
a pressure transmission valve is clamped and fixed between the pressure bearing seat and the upper connecting sleeve;
the upper end of the upper connecting sleeve is connected with the oil pipe;
the lower end of the lower connecting sleeve is connected with a sieve tube;
the screen pipe is used for screening out the well fluid impurities.
7. The oil well layered water plugging and top pressure relief preventing process pipe column as claimed in claim 6, wherein:
an upper joint is connected between the upper connecting sleeve and the oil pipe;
and a lower joint is connected between the lower connecting sleeve and the sieve tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020470532.2U CN212003052U (en) | 2020-04-02 | 2020-04-02 | Oil well layered water plugging and top pressure relief preventing process pipe column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020470532.2U CN212003052U (en) | 2020-04-02 | 2020-04-02 | Oil well layered water plugging and top pressure relief preventing process pipe column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212003052U true CN212003052U (en) | 2020-11-24 |
Family
ID=73403637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020470532.2U Active CN212003052U (en) | 2020-04-02 | 2020-04-02 | Oil well layered water plugging and top pressure relief preventing process pipe column |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212003052U (en) |
-
2020
- 2020-04-02 CN CN202020470532.2U patent/CN212003052U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1243746B1 (en) | Method and multi-purpose apparatus for dispensing and circulating fluid in wellbore casing | |
| US4030354A (en) | Testing of ram and annular blowout preventers | |
| EP1256691A2 (en) | Fill-up and circulation tool with torque assembly | |
| CN107859499B (en) | Pressurized operation device | |
| CN105804680A (en) | Under-pressure well repairing working device and method of oil-gas field | |
| CN205422562U (en) | Not kill -job of shale gas well is not taken and has been pressed down flow string | |
| CN218563627U (en) | Double-core annular blowout preventer capable of sealing accompanying cable or hydraulic control pipe column | |
| NO892760L (en) | SAFETY VALVE TESTING DEVICE. | |
| CN111827897A (en) | Oil pipe lowering device suitable for high-pressure gas well | |
| CN205605156U (en) | Workover device is pressed in oil gas field area | |
| CN108798615B (en) | Separate injection well completion pipe string of water injection well and snubbing well completion process | |
| US2241333A (en) | Well head | |
| CN212003052U (en) | Oil well layered water plugging and top pressure relief preventing process pipe column | |
| CN101691834B (en) | Inner tube-free drillable-retrievable grading cementing well completion technology | |
| CN211692429U (en) | Multifunctional fracturing well completion pipe string for high-temperature and high-pressure oil and gas well | |
| WO2021179016A1 (en) | Method and apparatus for sacrificial wellhead protector and testing adapter | |
| CN210049870U (en) | Hydraulic control constant pressure backwashing valve | |
| CN108104764B (en) | Temporary blocking type bridge plug | |
| CN216588534U (en) | Mechanical expansion seal releasable fishing spear blanking plug | |
| CN111411914A (en) | Blowout prevention blanking plug for shaft | |
| CN115095303A (en) | Underground liquid control device and using method thereof | |
| CN112324384B (en) | Non-well killing operation process method applying pressure control switch valve | |
| CN108252681B (en) | Steam channeling prevention and control device and method for thermal production well operation | |
| CN219262336U (en) | Casing damage underground long-acting packing device for petroleum exploitation | |
| CN212671739U (en) | Concentric double-pipe water injection packer for operation under pressure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211222 Address after: 163453 Heilongjiang Province, Daqing City Ranghulu District No. 233 South Central Avenue Patentee after: Daqing Oilfield Co.,Ltd. Patentee after: PetroChina Company Limited Address before: 163453 Heilongjiang Province, Daqing City Ranghulu District No. 233 South Central Avenue Patentee before: Daqing Oilfield Co.,Ltd. |
|
| TR01 | Transfer of patent right |