CN112267861A - Layered water injection device for underground cable wet butt joint - Google Patents
Layered water injection device for underground cable wet butt joint Download PDFInfo
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- CN112267861A CN112267861A CN202011267787.XA CN202011267787A CN112267861A CN 112267861 A CN112267861 A CN 112267861A CN 202011267787 A CN202011267787 A CN 202011267787A CN 112267861 A CN112267861 A CN 112267861A
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- cable
- water injection
- wet
- butt joint
- water distributor
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 131
- 238000002347 injection Methods 0.000 title claims abstract description 75
- 239000007924 injection Substances 0.000 title claims abstract description 75
- 210000001503 joint Anatomy 0.000 title claims abstract description 55
- 238000001514 detection method Methods 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims abstract description 16
- 238000004891 communication Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 238000003032 molecular docking Methods 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 33
- 230000008901 benefit Effects 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/023—Arrangements for connecting cables or wirelines to downhole devices
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/028—Electrical or electro-magnetic connections
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Mechanical Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention relates to the technical field of oil exploitation, in particular to a layered water injection device for underground cable wet butt joint, which comprises a water injection wellhead; the cable sealing device is arranged on the water injection wellhead; the oil pipe is arranged below the water injection wellhead; the carrier cable can pass through the cable sealing device; one end of the bearing cable is connected with the ground control device, and the other end of the bearing cable is provided with a wet butt joint plug; the cable wet butt joint device is arranged in the oil pipe; a wet butt joint socket is arranged on the cable wet butt joint device; the cable packer is arranged on the oil pipe; a water distributor is arranged below each cable passing packer; a one-way valve is arranged below the water distributor at the lowest end; a sieve tube is arranged below the one-way valve; a parameter detection assembly is arranged on the water distributor; an electric valve is arranged on the water distributor; the cable wet butt joint device is connected with the water distributor through a flat cable; the ground control device is respectively connected with the parameter detection assembly and the electric valve. The cable protection device can avoid cable damage and improve operation efficiency.
Description
Technical Field
The invention relates to the technical field of oil exploitation, in particular to a layered water injection device for underground cable wet butt joint.
Background
With the increase of the exploitation time of the oil field, the energy of the oil layer is continuously consumed, so that the pressure of the oil layer is continuously reduced, the yield of crude oil is reduced, in order to make up for the underground deficit caused by the exploitation of the crude oil, maintain or improve the pressure of the oil layer, realize the high and stable yield of the oil field, and obtain higher recovery ratio, water injection must be carried out on the oil field. Along with the gradual deepening of water injection development of oil and gas fields, the construction of water injection wells in separate layers is more and more frequent. The separate layer water injection is a water injection mode that a packer is put into a water injection well to separate oil layers with larger differences, and then a water distributor is used for separate layer water distribution, so that the water injection amount of a high-permeability layer is controlled, the water injection of a medium-low permeability oil layer is enhanced, and various oil layers can play roles.
At present, most oil fields adopt an intelligent layered water injection mode, an underground measuring instrument and an electric actuating mechanism need power supply and signal transmission, in the prior art, cables of a water injection device are all fixed outside an oil pipe for laying, and when equipment is put down or lifted, the cables outside the oil pipe collide with a sleeve pipe, so that the cables are easily damaged; the damage of the cable is easy to generate safety risk; moreover, the cable is expensive, and the damage of the cable causes economic loss; and the labor intensity of repairing or replacing the cable is high, the consumed time is long, and therefore the operation efficiency is influenced.
Disclosure of Invention
In view of this, the invention provides a layered water injection device for underground cable wet butt joint, which mainly aims to avoid cable damage and improve operation efficiency.
In order to achieve the purpose, the invention mainly provides the following technical scheme:
the embodiment of the invention provides a layered water injection device for underground cable wet butt joint, which comprises a water injection wellhead, an oil pipe, a cable sealing device, a bearing cable, a cable wet butt joint device, a cable passing packer and a ground control device, wherein the oil pipe is connected with the bearing cable through the cable wet butt joint device;
the cable sealing device is arranged on the water injection wellhead;
the oil pipe is arranged below the water injection well mouth and communicated with the water injection well mouth;
the carrier cable can pass through the cable sealing device and extend towards the oil pipe;
one end of the bearing cable is connected with the ground control device; the other end of the carrier cable has a wet mate plug;
the cable wet docking device is fixedly arranged in the oil pipe; a wet butt joint socket is arranged on the cable wet butt joint device and is used for butt joint with the wet butt joint plug;
the cable passing packer is arranged on the oil pipe and is positioned below the cable wet butt joint device; the number of the cable passing packers is multiple; a water distributor is arranged below each cable packer; a one-way valve is fixedly arranged below the water distributor at the lowest end; a sieve tube is arranged below the one-way valve;
a parameter detection assembly is arranged on the water distributor; the parameter detection assembly includes: temperature and pressure sensors; an electric valve is arranged on the water distributor to control the flow of the water distributor;
the cable wet butt joint device is connected with the water distributor through a flat cable; the flat cable penetrates through the cable-passing packer to be connected with the water distributor;
the ground control device is connected with the parameter detection assembly sequentially through the bearing cable, the cable wet butt joint device and the flat cable and is used for acquiring data of the parameter detection assembly; the ground control device is connected with the electric valve and used for controlling the water distributor to inject water.
Further, an insert seal is arranged between the oil pipe and the over-cable packer.
Further, the water distributor is a multifunctional integrated water distributor.
Further, the multifunctional integrated water distributor is a cable-controlled intelligent water distributor.
Further, a wellhead flowmeter is arranged on the water injection wellhead;
and a wellhead pressure gauge is arranged on the water injection wellhead.
Further, the wellhead flowmeter and the wellhead pressure gauge are respectively connected with the ground control device.
Further, a display unit is arranged on the ground control device and used for displaying the detected parameters.
And furthermore, a cable winding and unwinding device is arranged on the water injection wellhead and used for controlling the load bearing cable to be wound or unwound.
Furthermore, a communication control cable and a power cable are arranged in the bearing cable.
Further, the parameter detection assembly further comprises: a flow sensor; the flow sensor is used for detecting the flow output by the water distributor.
By the technical scheme, the underground cable wet butt joint layered water injection device at least has the following advantages:
can avoid the cable damage, promote the operating efficiency.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of a downhole cable wet-butted zonal water injection apparatus according to an embodiment of the present invention.
Shown in the figure:
1 is a water injection well mouth, 2 is a cable sealing device, 3 is a bearing cable, 3-1 is a wet butt joint plug, 4 is a ground control device, 5 is an oil pipe, 6 is a cable wet butt joint device, 6-1 is a wet butt joint socket, 7 is a cable passing packer, 8 is a water distributor, 9 is a one-way valve, 10 is a sieve pipe and 11 is a flat cable.
Detailed Description
To further explain the technical means and effects of the present invention adopted to achieve the predetermined object, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
As shown in FIG. 1, the zonal injection device for downhole cable wet butt joint according to one embodiment of the present invention comprises a water injection wellhead 1, an oil pipe 5, a cable sealing device 2, a carrying cable 3, a cable wet butt joint device 6, a cable-passing packer 7 and a surface control device 4;
the cable sealing device 2 is arranged on the water injection wellhead 1 and used for sealing a bearing cable 3 which is arranged in the well; during high-pressure water injection, liquid in the well is prevented from overflowing the wellhead through the bearing cable 3. The oil pipe 5 is arranged below the water injection well mouth 1 and communicated with the water injection well mouth 1; the oil pipe 5 is detachably connected with the water injection wellhead 1.
The carrier cable 3 can pass through the cable sealing device 2 and extend towards the oil pipe 5; preferably, the load-bearing cable 3 has a double-layer armor layer, so that the load-bearing cable has the advantages of ensuring insulation in a high-voltage environment and having strong longitudinal tension. One end of the bearing cable 3 is connected with a ground control device 4, and the other end enters the underground through the cable sealing device 2 and is in butt joint with a downhole cable wet butt joint device 6. One end of the bearing cable 3 is connected with a ground control device 4; the other end of the carrier cable 3 has a wet mate plug 3-1;
the cable wet butt joint device 6 is fixedly arranged in the oil pipe 5; a wet butt joint socket 6-1 is arranged on the cable wet butt joint device 6 and is used for butt joint with a wet butt joint plug 3-1; the wet mate receptacle 6-1 mates with and secures insulation to the wet mate plug 3-1 on the carrier cable 3.
The cable packer 7 is arranged on the oil pipe 5 and is positioned below the cable wet butt joint device 6; preferably, the present embodiment provides a plug-in seal between the tubing 5 and the over-cable packer 7 to increase its sealing.
A plurality of cable-passing packers 7 are arranged; the number of the through-cable packers 7 can be 1 or more than 1; according to the number of water injection layers, the cable passing packers 7 and the water distributors 8 are distributed in corresponding numbers, and the cable passing packers 7 are arranged between the water injection layers.
A water distributor 8 is arranged below each cable packer 7; a one-way valve 9 is fixedly arranged below the water distributor 8 at the lowest end; a sieve tube 10 is arranged below the one-way valve 9; the through-cable packer 7 is used for separating a plurality of water injection layers in the well, and ensures that no layer is crossed when one water injection layer is injected with water.
A parameter detection assembly is arranged on the water distributor 8; the parameter detection assembly comprises: temperature and pressure sensors; an electric valve is arranged on the water distributor 8 to control the flow of the water distributor 8; the parameter detection assembly detects parameters such as underground temperature and pressure, transmits data to the ground control device 4 in a power carrier mode, and the ground control device 4 can control the opening and closing of an electric valve of the water distributor 8 to achieve the purpose of reasonable and accurate water injection. In the preferred embodiment, the water distributor 8 is a multifunctional integrated water distributor to realize the control of the flow and the detection of the parameters. Further preferably, the multifunctional integrated water distributor is a cable-controlled intelligent water distributor so as to realize intelligent control. Preferably, in this embodiment, the parameter detecting component further includes: a flow sensor; the flow sensor is used for detecting the flow output by the water distributor 8, and the flow detection and the accurate control are realized.
The cable wet butt joint device 6 is connected with the water distributor 8 through a flat cable 11; the flat cable passes through the cable packer 7 and is connected with the water distributor 8;
the ground control device 4 is connected with the parameter detection assembly sequentially through the bearing cable 3, the cable wet butt joint device 6 and the flat cable 11 and is used for acquiring data of the parameter detection assembly; the ground control device 4 is connected with the electric valve and is used for controlling the water distributor 8 to inject water. The ground control device 4 collects parameters such as underground pressure, temperature and the like, and controls the underground water distributor 8 to inject water according to the collected parameters and the water injection process requirements. In the preferred embodiment, the ground control device 4 is provided with a display unit for displaying the detected parameters, so as to facilitate the operation and control of the operator. The flat cable 11 may be a small flat cable 11.
One end of a bearing cable 3 is connected with a ground control device 4, the other end of the bearing cable 3 is provided with a wet butt joint plug 3-1, the end of the wet butt joint plug 3-1 of the bearing cable 3 enters a water injection wellhead 1 through a cable sealing device 2 and then downwards reaches a cable wet butt joint device 6 through an oil pipe 5, and the wet butt joint plug 3-1 is inserted into a wet butt joint socket 6-1 in the cable wet butt joint device 6.
According to the underground cable wet-butt layered water injection device provided by the embodiment of the invention, the bearing cable 3 is operated in a throwing and dragging mode in the oil pipe 5, so that the bearing cable 3 is prevented from being damaged, the bearing cable 3 can be repeatedly used, the operation process is simple, the underground water injection layer condition can be dynamically detected, accurate water injection is realized, the cost is reduced, the recovery ratio is improved, the high and stable yield of crude oil is ensured, and the economic benefit is good.
According to the stratified water injection device for underground cable wet butt joint, provided by the embodiment of the invention, the damage of a cable can be avoided, and the operation efficiency is improved.
As a preferable example of the above embodiment, a wellhead flowmeter is arranged on the water injection wellhead 1 to detect the water injection flow rate of the water injection wellhead 1; the water injection wellhead 1 is provided with a wellhead pressure gauge to detect the pressure of the water injection wellhead 1. Further preferably, the wellhead flow meter and the wellhead pressure meter are respectively connected with the surface control device 4, so that the surface control device 4 can detect and display wellhead flow and wellhead pressure.
Preferably, the water injection wellhead 1 is provided with a cable retraction device for controlling the lowering or the upward retraction of the carrier cable 3, so as to retract the carrier cable 3.
As the optimization of the above embodiment, a communication control cable and a power cable are arranged in the bearing cable 3, one cable can transmit signals and provide power, and the ground control device 4 acquires parameters such as pressure and temperature of each water injection layer and controls the water distributor 8 of each water injection layer to implement accurate water distribution.
According to the layered water injection device for underground cable wet butt joint provided by one embodiment of the invention, during construction, equipment except the bearing cable 3 can be firstly put into an underground water injection layer, then the bearing cable 3 is directly put down from an oil pipe 5 to be in butt joint with the cable wet butt joint device 6, and connection between the ground control device 4 and underground equipment is completed. When the water injection equipment in pit need operations such as maintenance, bear the weight of cable 3 and can directly follow oil pipe 5 earlier and propose oil pipe 5 and other equipment out ground again and overhaul etc. avoid the cable impaired like this, cable repeatedly usable, the operation process is simple, and the operating time is short with low costs.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The standard parts used in the invention can be purchased from the market, the special-shaped parts can be customized according to the description of the specification and the accompanying drawings, the specific connection mode of each part adopts conventional means such as bolts, rivets, welding and the like mature in the prior art, the machines, the parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, so that the detailed description is omitted.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are still within the scope of the technical solution of the present invention.
Claims (10)
1. A layered water injection device for underground cable wet butt joint is characterized by comprising a water injection wellhead, an oil pipe, a cable sealing device, a bearing cable, a cable wet butt joint device, a cable passing packer and a ground control device;
the cable sealing device is arranged on the water injection wellhead;
the oil pipe is arranged below the water injection well mouth and communicated with the water injection well mouth;
the carrier cable can pass through the cable sealing device and extend towards the oil pipe;
one end of the bearing cable is connected with the ground control device; the other end of the carrier cable has a wet mate plug;
the cable wet docking device is fixedly arranged in the oil pipe; a wet butt joint socket is arranged on the cable wet butt joint device and is used for butt joint with the wet butt joint plug;
the cable passing packer is arranged on the oil pipe and is positioned below the cable wet butt joint device; the number of the cable passing packers is multiple; a water distributor is arranged below each cable packer; a one-way valve is fixedly arranged below the water distributor at the lowest end; a sieve tube is arranged below the one-way valve;
a parameter detection assembly is arranged on the water distributor; the parameter detection assembly includes: temperature and pressure sensors; an electric valve is arranged on the water distributor to control the flow of the water distributor;
the cable wet butt joint device is connected with the water distributor through a flat cable; the flat cable penetrates through the cable-passing packer to be connected with the water distributor;
the ground control device is connected with the parameter detection assembly sequentially through the bearing cable, the cable wet butt joint device and the flat cable and is used for acquiring data of the parameter detection assembly; the ground control device is connected with the electric valve and used for controlling the water distributor to inject water.
2. The downhole wireline wet-docked stratified water injection apparatus of claim 1,
and an inserting seal is arranged between the oil pipe and the cable passing packer.
3. The downhole wireline wet-docked stratified water injection apparatus of claim 1,
the water distributor is a multifunctional integrated water distributor.
4. The downhole wireline wet-docked stratified water injection apparatus of claim 3,
the multifunctional integrated water distributor is a cable-controlled intelligent water distributor.
5. The downhole wireline wet-docked stratified water injection apparatus of claim 1,
a wellhead flowmeter is arranged on the water injection wellhead;
and a wellhead pressure gauge is arranged on the water injection wellhead.
6. The downhole wireline wet-docked stratified water injection apparatus of claim 5,
the wellhead flowmeter and the wellhead pressure gauge are respectively connected with the ground control device.
7. The downhole wireline wet-docked stratified water injection apparatus of claim 1,
and the ground control device is provided with a display unit for displaying the detected parameters.
8. The downhole wireline wet-docked stratified water injection apparatus of claim 1,
and the water injection wellhead is provided with a cable winding and unwinding device for controlling the lowering or the upward winding of the bearing cable.
9. The downhole wireline wet-docked stratified water injection apparatus of claim 1,
and a communication control cable and a power cable are arranged in the bearing cable.
10. The downhole wireline wet-docked stratified water injection apparatus of claim 1,
the parameter detection assembly further comprises: a flow sensor; the flow sensor is used for detecting the flow output by the water distributor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011267787.XA CN112267861A (en) | 2020-11-13 | 2020-11-13 | Layered water injection device for underground cable wet butt joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011267787.XA CN112267861A (en) | 2020-11-13 | 2020-11-13 | Layered water injection device for underground cable wet butt joint |
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| Publication Number | Publication Date |
|---|---|
| CN112267861A true CN112267861A (en) | 2021-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011267787.XA Pending CN112267861A (en) | 2020-11-13 | 2020-11-13 | Layered water injection device for underground cable wet butt joint |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114575803A (en) * | 2022-02-09 | 2022-06-03 | 中海油能源发展股份有限公司 | Layered water injection tool capable of realizing underground charging and signal transmission and transmission method thereof |
-
2020
- 2020-11-13 CN CN202011267787.XA patent/CN112267861A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114575803A (en) * | 2022-02-09 | 2022-06-03 | 中海油能源发展股份有限公司 | Layered water injection tool capable of realizing underground charging and signal transmission and transmission method thereof |
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