CN111636846A - Pressure wellhead plugging device - Google Patents
Pressure wellhead plugging device Download PDFInfo
- Publication number
- CN111636846A CN111636846A CN202010318943.4A CN202010318943A CN111636846A CN 111636846 A CN111636846 A CN 111636846A CN 202010318943 A CN202010318943 A CN 202010318943A CN 111636846 A CN111636846 A CN 111636846A
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- CN
- China
- Prior art keywords
- hydraulic oil
- temporary plugging
- plugging agent
- unit
- way valve
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- 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.)
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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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
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- 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
- E21B36/00—Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
- E21B36/04—Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones using electrical heaters
Abstract
The invention discloses a pressurized wellhead plugging device which comprises a temporary plugging agent injector, an injection manifold, an injection hose, an oil tank, a hydraulic pump station, a hydraulic oil pipeline, a multi-way valve bank, a temporary plugging agent pressurization tank, a screw pump and a supercharger; the working principle is that the temporary plugging agent is injected into the annular space of each layer of the casing and the interior of the oil pipe layer by layer through a hydraulic system, then the casing of the surface layer is cooled, and after a period of freezing, the temporary plugging agent forms a stable bridge plug, and then the temporary plugging of the annular space of the multilayer casing and the interior of the oil pipe is completed; the device also comprises an electric heating unit, an energy power unit, a temporary plugging agent preparation unit, a high-pressure water cleaning unit, an auxiliary unit and a lighting unit, wherein the units are integrated in a movable container, so that the movable container is convenient to transport and meets the requirements of site construction.
Description
Technical Field
The invention belongs to the technical field of oil and gas exploitation, and particularly relates to a blocking device for a pressurized wellhead.
Background
In the process of oil and gas exploitation, it is very important to maintain the relative balance between the pressure in the shaft and the formation pressure, and when the operation of repairing the oil well or the gas well under pressure and replacing the oil and gas exploitation wellhead or part of gate valves is implemented, the oil and gas channel leading to the ground in the well needs to be plugged.
The basic principle of the conventional well killing technology is to balance the formation pressure by using the resistance (back pressure) generated by a surface throttle valve and the bottom hole pressure formed by the pressure of a drilling fluid column in a well based on the principle of a U-shaped pipe. During the well killing process, the bottom hole pressure is always kept slightly higher than the formation pressure and is kept unchanged. The weighted drilling fluid is driven into the well with the constant killing discharge capacity, the throttling pressure is gradually reduced along with the increase of the weighted drilling fluid, and when the drilling fluid to be weighted returns out of the well mouth, the throttling pressure is reduced to zero, so that the well is balanced again.
Conventional kill-wells, however, often suffer from several problems:
1. the bottom hole pressure is difficult to control and keep slightly larger than the formation pressure during killing, and meanwhile, the bottom hole pressure is kept unchanged. Thus often resulting in formation fluids re-entering the well during the process of re-establishing equilibrium;
2. in the well killing process, the well bore pressure needs to be accurately controlled, the small displacement and the proper throttle opening are mastered, otherwise once the stratum is killed, the underground complex condition or underground blowout is easy to occur;
3. most importantly, conventional kill wells can easily damage the hydrocarbon reservoir, compromising the productivity of the hydrocarbon reservoir.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a pressurized wellhead plugging device. The device can inject the colloidal substance (also called temporary plugging agent) with strong viscosity into the shaft under pressure, and then the plugging of the well mouth can be completed by matching with an external cooling device.
The invention is realized by the following technical scheme:
a pressure wellhead plugging device comprises a temporary plugging agent injector, an injection manifold, an injection hose, an oil tank, a hydraulic pump station, a hydraulic oil pipeline, a multi-way valve bank, a temporary plugging agent pressurization tank, a screw pump and a supercharger;
the temporary plugging agent injector comprises a cylinder body, a connecting rod, a colloid side piston, a hydraulic oil side piston, a pressure sensor and a displacement sensor, wherein a colloid interface and a hydraulic oil junction interface are respectively arranged at two ends of the cylinder body;
the outlet end of the temporary plugging agent pressurization tank is connected with the inlet end of a screw pump, the outlet end of the screw pump is connected with the colloid interface of the temporary plugging agent injector through an injection manifold, and the colloid interface of the temporary plugging agent injector is connected with an injection hose through an injection manifold;
the hydraulic oil pipelines comprise a first hydraulic oil pipeline, a second hydraulic oil pipeline, a third hydraulic oil pipeline and a fourth hydraulic oil pipeline which are all connected with an oil tank through a hydraulic pump station, and the multi-way valve group comprises a first multi-way valve, a second multi-way valve, a third multi-way valve and a fourth multi-way valve which are respectively arranged on the first hydraulic oil pipeline, the second hydraulic oil pipeline, the third hydraulic oil pipeline and the fourth hydraulic oil pipeline;
the first hydraulic oil pipeline is connected with a motor of the screw pump and used for driving the screw pump; the second hydraulic oil pipeline is connected with the temporary plugging agent pressurizing tank and is used for pressurizing the temporary plugging agent to enable the temporary plugging agent to enter the screw pump; the third multi-way valve is connected with a hydraulic oil injection end of the temporary plugging agent injector and is used for injecting hydraulic oil into a cavity of the temporary plugging agent injector; and the fourth multi-way valve is connected with the hydraulic oil injection end of the temporary plugging agent injector after passing through the supercharger and is used for injecting pressurized hydraulic oil into the cavity of the temporary plugging agent injector.
In the technical scheme, the cylinder body is provided with a pressure sensor for monitoring the oil pressure of hydraulic oil and a displacement sensor for monitoring the position of the piston.
In the technical scheme, the plugging device further comprises an electric heating unit, an energy power unit, a temporary plugging agent preparation unit, a high-pressure water cleaning unit, an auxiliary unit and an illumination unit, and the plugging device and the units are integrated in a movable container, so that the plugging device is convenient to transport and meets the requirements of site construction.
In the technical scheme, the electric heating unit can heat the interior of the container so as to cope with cold working environments in winter and meet the working environment below 0 ℃ outdoors.
In the technical scheme, the energy power unit can adopt a generator and is used for configuring electric drive for an electric heating unit, a temporary plugging agent preparation unit, a hydraulic injection unit, a high-pressure water cleaning unit, an illumination unit and the like of the device; the electric power tool is suitable for non-wellhead operation, can independently provide electric power energy, and does not need to use electric power of a drilling crew.
In the above technical solution, the temporary plugging agent preparation unit may adopt an electric or manual stirrer, is mounted by using a wheel, is convenient to move, and may move to the outside of the container to complete the temporary plugging agent mixing operation if necessary.
In the technical scheme, the high-pressure water cleaning unit is used for unfreezing the temporary plugging agent and cleaning the site.
In the technical scheme, the auxiliary unit is used for storing a storage cabinet of a working tool, a workbench and bench clamps for field operation.
In the technical scheme, the lighting unit can adopt a fluorescent lamp and a movable floodlight, and has the functions of explosion prevention, water prevention, corrosion prevention and dust prevention.
The invention has the advantages and beneficial effects that:
1. the invention relates to a pressurized wellhead plugging device which has the working principle that a temporary plugging agent is injected into each layer of casing annulus and the interior of an oil pipe layer by layer through a hydraulic system, then the casing annulus and the interior of the oil pipe layer by layer are cooled, and the temporary plugging agent forms a stable bridge plug after a period of freezing, so that the temporary plugging of the multi-layer casing annulus and the interior of the oil pipe is completed.
2. The invention further comprises an electric heating unit, an energy power unit, a temporary plugging agent preparation unit, a high-pressure water cleaning unit, an auxiliary unit and an illumination unit, wherein the plugging device and the units are integrated in a movable container, so that the plugging device is convenient to transport and meets the requirements of site construction.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a pressurized wellhead plugging device.
Fig. 2 is a schematic diagram of the operation principle of a pressurized wellhead plugging device.
Fig. 3 is a schematic view of a structure of a temporary plugging agent injector.
Fig. 4 is a layout diagram of a pressurized wellhead plugging device and integrated units.
The device comprises an oil tank 1, a hydraulic pump station 2, a multi-way valve group 3, a first multi-way valve 3-1, a second multi-way valve 3-2, a third multi-way valve 3-3, a fourth multi-way valve 3-4, a supercharger 4, a temporary plugging agent pressurizing tank 5, a screw pump motor 6, a screw pump 7, a temporary plugging agent injector 8-1, a colloid interface 8-2, a connecting rod 8-2, a cylinder body 8-3, a colloid side piston 8-4, a hydraulic oil side piston 8-5, a hydraulic oil junction interface 8-6, a pressure sensor 8-7, a displacement sensor 8-8, an injection hose 9 and an injection manifold 10.
101 is a temporary plugging agent preparation unit, 102 is a high-pressure water cleaning unit, 103 is an electric heating unit, 104 is an auxiliary unit and an illuminating unit, 105 is a hydraulic injection unit, and 106 is an energy power unit.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the present invention is further described below with reference to specific examples.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A pressure wellhead plugging device comprises a temporary plugging agent injector 8, an injection manifold 10, an injection hose 9, an oil tank 1, a hydraulic pump station 2, a hydraulic oil pipeline, a multi-way valve group 3, a temporary plugging agent pressurization tank 5, a screw pump 7 and a supercharger 4;
the temporary plugging agent injector comprises a cylinder body 8-3, a connecting rod 8-2, a colloid side piston 8-4, a hydraulic oil side piston 8-5, a pressure sensor 8-7 and a displacement sensor 8-8, wherein a colloid interface 8-1 and a hydraulic oil junction interface 8-6 are respectively arranged at two ends of the cylinder body, a rigid connecting rod is arranged in the cylinder body, the colloid side piston is arranged at one end of the cylinder body, the hydraulic oil side piston is arranged at the other end of the cylinder body, the pressure sensor for monitoring the oil pressure of hydraulic oil and the displacement sensor for monitoring the position of the piston are arranged on the cylinder body.
The outlet end of the temporary plugging agent pressurization tank is connected with the inlet end of a screw pump, the outlet end of the screw pump is connected with a colloid interface of the temporary plugging agent injector through an injection manifold 10, and the colloid interface of the temporary plugging agent injector is connected with an injection hose 9 through an injection manifold;
the hydraulic oil pipelines comprise a first hydraulic oil pipeline, a second hydraulic oil pipeline, a third hydraulic oil pipeline and a fourth hydraulic oil pipeline which are all connected with an oil tank through a hydraulic pump station, and the multi-way valve group comprises a first multi-way valve 3-1, a second multi-way valve 3-2, a third multi-way valve 3-3 and a fourth multi-way valve 3-4 which are respectively arranged on the first hydraulic oil pipeline, the second hydraulic oil pipeline, the third hydraulic oil pipeline and the fourth hydraulic oil pipeline;
the first hydraulic oil pipeline is connected with the screw pump motor 6 and used for driving a screw pump; the second hydraulic oil pipeline is connected with the temporary plugging agent pressurizing tank and is used for pressurizing the temporary plugging agent to enable the temporary plugging agent to enter the screw pump; the third multi-way valve is connected with a hydraulic oil injection end of the temporary plugging agent injector and is used for injecting hydraulic oil into a cavity of the temporary plugging agent injector; and the fourth multi-way valve is connected with the hydraulic oil injection end of the temporary plugging agent injector after passing through the supercharger and is used for injecting pressurized hydraulic oil into the cavity of the temporary plugging agent injector.
The utility model provides a kill plug device of kill plug still includes electrical heating unit, energy power unit, temporary plugging agent preparation unit, hydraulic pressure injection unit, high pressure water cleaning unit, auxiliary unit and lighting unit.
A hydraulic injection unit comprising: temporary plugging agent (patch soil/colloid) pouring unit and temporary plugging agent (patch soil/colloid) pouring unit.
Temporary plugging agent perfusion unit, including: a temporary plugging agent pressurizing tank and a screw pump.
A temporary plugging agent injection unit comprising: a booster and a temporary plugging agent injector.
All the above components are arranged in a pry block for convenient transportation. The electric heating unit can heat the device to cope with cold working environment in winter and meet the working environment below 0 ℃ outdoors.
The energy power unit can be used for configuring electric drive for an electric heating unit, a temporary plugging agent preparation unit, a hydraulic injection unit, a high-pressure water cleaning unit, a lighting unit and the like of the device. Therefore, the equipment can be suitable for non-wellhead operation, can independently provide electric energy, and does not need to use electric power of a drilling crew.
The temporary plugging agent preparation unit can adopt an electric or manual stirrer, is suggested to adopt a wheel type installation, is convenient to move, and can move to the outside of the container to complete the mixing operation of the temporary plugging agent when necessary.
And the high-pressure hot water cleaning unit can be used for unfreezing the temporary plugging agent and cleaning the site.
An auxiliary unit comprising: a storage cabinet for storing operation tools, a worktable for field operation and bench clamps. A lighting unit comprising: explosion-proof, waterproof, anticorrosive, dustproof fluorescent lamp, portable floodlight.
When the hydraulic pump station works, the hydraulic pump station 2 pumps hydraulic oil out of the oil tank 1 and boosts the pressure, and an operator operates equipment by operating the multi-way valve group 3. Specifically, the second multi-way valve 3-2 is operated to control the pressurizing tank 5 to pressurize the temporary plugging agent, the first multi-way valve 3-1 is operated to drive the screw pump motor 6 to rotate and drive the screw pump 7 to fill the temporary plugging agent injector 8, the third multi-way valve 3-3 is operated to release pressure of hydraulic oil on one side of the injector during filling, after filling of the temporary plugging agent injector 8 is completed, the injection manifold 10 is operated, and the temporary plugging agent injector 8 is communicated with the injection hose 9. When the pressure of the wellhead is not high, the third multi-way valve 3-3 can be operated to introduce high-pressure hydraulic oil into the temporary plugging agent injector 8, and the temporary plugging agent in the temporary plugging agent injector 8 is injected into the wellhead through the injection manifold 10 and the injection hose 9. When the pressure of the wellhead is higher, the fourth multi-way valve 3-4 is operated to introduce high-pressure hydraulic oil into the supercharger 4 for supercharging, then the supercharged ultrahigh-pressure hydraulic oil is introduced into the temporary plugging agent injector 8, and the high-pressure temporary plugging agent is injected into the wellhead through the injection manifold 10 and the injection hose 9.
The wellhead plugging device with pressure can perform temporary plugging in a sleeve annulus and an oil pipe, and can isolate the bottom pressure after plugging is completed, so that the replacement or maintenance of the part above a freezing point is completed. Has the advantages of high safety factor, no damage to the producing zone, no need of induced spraying and the like.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
The invention has been described in an illustrative manner, and it is to be understood that any simple variations, modifications or other equivalent changes which can be made by one skilled in the art without departing from the spirit of the invention fall within the scope of the invention.
Claims (9)
1. The utility model provides a kill pressure well head plugging device which characterized in that: a pressure wellhead plugging device comprises a temporary plugging agent injector, an injection manifold, an injection hose, an oil tank, a hydraulic pump station, a hydraulic oil pipeline, a multi-way valve bank, a temporary plugging agent pressurization tank, a screw pump and a supercharger;
the temporary plugging agent injector comprises a cylinder body, a connecting rod, a colloid side piston, a hydraulic oil side piston, a pressure sensor and a displacement sensor, wherein a colloid interface and a hydraulic oil junction interface are respectively arranged at two ends of the cylinder body;
the outlet end of the temporary plugging agent pressurization tank is connected with the inlet end of a screw pump, the outlet end of the screw pump is connected with the colloid interface of the temporary plugging agent injector through an injection manifold, and the colloid interface of the temporary plugging agent injector is connected with an injection hose through an injection manifold;
the hydraulic oil pipelines comprise a first hydraulic oil pipeline, a second hydraulic oil pipeline, a third hydraulic oil pipeline and a fourth hydraulic oil pipeline which are all connected with an oil tank through a hydraulic pump station, and the multi-way valve group comprises a first multi-way valve, a second multi-way valve, a third multi-way valve and a fourth multi-way valve which are respectively arranged on the first hydraulic oil pipeline, the second hydraulic oil pipeline, the third hydraulic oil pipeline and the fourth hydraulic oil pipeline;
the first hydraulic oil pipeline is connected with a motor of the screw pump and used for driving the screw pump; the second hydraulic oil pipeline is connected with the temporary plugging agent pressurizing tank and is used for pressurizing the temporary plugging agent to enable the temporary plugging agent to enter the screw pump; the third multi-way valve is connected with a hydraulic oil injection end of the temporary plugging agent injector and is used for injecting hydraulic oil into a cavity of the temporary plugging agent injector; and the fourth multi-way valve is connected with the hydraulic oil injection end of the temporary plugging agent injector after passing through the supercharger and is used for injecting pressurized hydraulic oil into the cavity of the temporary plugging agent injector.
2. The kill plugging device of claim 1, wherein: be provided with the pressure sensor who is used for monitoring hydraulic oil pressure on the cylinder body to reach the displacement sensor of monitoring piston position.
3. The kill plugging device of claim 1, wherein: the plugging device further comprises an electric heating unit, an energy power unit, a temporary plugging agent preparation unit, a high-pressure water cleaning unit, an auxiliary unit and an illumination unit, and the plugging device and the units are integrated in a movable container.
4. The kill plugging device of claim 3, wherein: the electric heating unit can heat the inside of the container.
5. The kill plugging device of claim 3, wherein: the energy power unit can adopt a generator and is used for configuring electric power for an electric heating unit, a temporary plugging agent preparation unit, a hydraulic injection unit, a high-pressure water cleaning unit and a lighting unit of the device.
6. The kill plugging device of claim 3, wherein: the temporary plugging agent preparation unit can adopt an electric or manual stirrer and is installed in a wheel mode.
7. The kill plugging device of claim 3, wherein: and the high-pressure water cleaning unit is used for unfreezing the temporary plugging agent and cleaning the site.
8. The kill plugging device of claim 3, wherein: the auxiliary unit is used for storing a storage cabinet of an operation tool, a workbench for field operation and bench clamps.
9. The kill plugging device of claim 3, wherein: the lighting unit can adopt a fluorescent lamp or a movable floodlight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010318943.4A CN111636846A (en) | 2020-04-21 | 2020-04-21 | Pressure wellhead plugging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010318943.4A CN111636846A (en) | 2020-04-21 | 2020-04-21 | Pressure wellhead plugging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111636846A true CN111636846A (en) | 2020-09-08 |
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ID=72326633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010318943.4A Pending CN111636846A (en) | 2020-04-21 | 2020-04-21 | Pressure wellhead plugging device |
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| Country | Link |
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| CN (1) | CN111636846A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112878976A (en) * | 2021-03-02 | 2021-06-01 | 四川申和新材料科技有限公司 | Remote control temporary plugging material injection system and application method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5372202A (en) * | 1992-08-28 | 1994-12-13 | Dallas; Murray | Wellhead isolation tool and method of use |
| CN201738861U (en) * | 2010-08-31 | 2011-02-09 | 中国石油集团川庆钻探工程有限公司 | Freezing and temporary blocking device |
| CN205823227U (en) * | 2016-08-01 | 2016-12-21 | 东营蒙德石油装备制造有限公司 | A kind of temporary block apparatus of fluid |
| CN207988987U (en) * | 2018-03-14 | 2018-10-19 | 维欧（天津）能源技术服务有限公司 | A kind of refrigeration temporary blocking equipment for offshore oil |
-
2020
- 2020-04-21 CN CN202010318943.4A patent/CN111636846A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5372202A (en) * | 1992-08-28 | 1994-12-13 | Dallas; Murray | Wellhead isolation tool and method of use |
| CN201738861U (en) * | 2010-08-31 | 2011-02-09 | 中国石油集团川庆钻探工程有限公司 | Freezing and temporary blocking device |
| CN205823227U (en) * | 2016-08-01 | 2016-12-21 | 东营蒙德石油装备制造有限公司 | A kind of temporary block apparatus of fluid |
| CN207988987U (en) * | 2018-03-14 | 2018-10-19 | 维欧（天津）能源技术服务有限公司 | A kind of refrigeration temporary blocking equipment for offshore oil |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112878976A (en) * | 2021-03-02 | 2021-06-01 | 四川申和新材料科技有限公司 | Remote control temporary plugging material injection system and application method |
| CN112878976B (en) * | 2021-03-02 | 2022-08-02 | 四川申和新材料科技有限公司 | Remote control temporary plugging material injection system and application method |
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Application publication date: 20200908 |