CN206158709U - Support formula water injection string - Google Patents
Support formula water injection string Download PDFInfo
- Publication number
- CN206158709U CN206158709U CN201621193400.XU CN201621193400U CN206158709U CN 206158709 U CN206158709 U CN 206158709U CN 201621193400 U CN201621193400 U CN 201621193400U CN 206158709 U CN206158709 U CN 206158709U
- Authority
- CN
- China
- Prior art keywords
- water injection
- string
- packer
- flow regulator
- downhole flow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The utility model relates to a tubular column, especially a support formula water injection string are adopted to the oil expenses air to open. The utility model discloses a support formula water injection string, including oil pipe, compensator, joint, at least one first water injection unit, slips and second water injection unit, in the water injection operation, it is flexible that setting through compensator, well -flushing valve isotructure can compensate the tubular column, avoids the packer to follow the tubular column and wriggle from top to bottom to prevent effectively that the packer from sitting midway that seal and the valve ball is buried, thereby effectively improve the sealing load and the life of packer.
Description
Technical field
This utility model is related to a kind of oil field oil-gas mining tubing string, particularly a kind of brace type water injection string.
Background technology
Low-permeability oil deposit has that reservoir buried depth is big, formation temperature is high, reservoir properties are poor, permeability is little, and different interlayer things
The features such as sex differernce is larger.At present, waterflooding development is a kind of technology of important exploitation low-permeability oil deposit.As oil field development is entered
Enter ultra-high water-containing development period, interlayer contradiction is more projected, seperated layer water injection is realized in layer, interlayer equilibrium displacement is to improve waterflooding extraction
The important measures of effect.
At present conventional water injection technology is suspension type separate zone waterflooding technology, conventional to hang tubing string in use, due to tubing string
Overall force unbalance, tubing string is integrally by a upper top power, and lower floor's water injection pressure is higher, and thereon top power is bigger, serious shadow
Ring seperated layer water injection effect duration；Meanwhile, separate injection tubing string water filling, well-flushing, it is dynamic stop during interlayer pressure difference, temperature change when, down-hole
Tubing string occurs flexible, easily causes tubing string and packer wrigglings, local creep, expands, and tubing string stretches caused end tear failure
Character substantially, easily causes packer sealing failure.
Utility model content
For the above-mentioned technical problem in the presence of prior art, the utility model proposes a kind of brace type water injection pipe
Post.By brace type water injection string of the present utility model, can effectively prevent tubing string, packer from wriggling, extend the use of sealer
In the life-span, improve flood effectiveness.
To solve above-mentioned technical problem, brace type water injection string of the present utility model, including oil pipe, the water injection string is also wrapped
Include compensator, joint, at least one first water injection units, slips and the second water injection unit being sequentially connected；The compensator one
End is connected with oil pipe, and the other end is connected with the joint；Wherein, first water injection unit by the first injection well downhole flow regulator, centralizer and
Packer is connected in sequence, and second water injection unit is connected in sequence by the second injection well downhole flow regulator and flushing valve.
Used as a kind of improvement of the present utility model, the joint is left-hand tool joint.
The packer is compressive washable well packet or the closed packer of expanding.
Used as another improvement of the present utility model, first injection well downhole flow regulator is rail mounted injection well downhole flow regulator.
Second injection well downhole flow regulator is rail mounted injection well downhole flow regulator.
The flushing valve is level pressure sand-sinking well flushing valve.
The slips is hydraulic slip.
Compared with prior art, the utility model has the advantage of：Tubing string is can compensate for by the setting of compensator to stretch,
Packer is avoided to wriggle up and down with tubing string, so as to effectively improve the seal pressure and service life of packer；Meanwhile, by level pressure
Sand-sinking well flushing valve realizes constant pressure turn on, effectively prevents packer midway from setting and valve ball is buried；Additionally, passing through left-hand tool joint
Use, be easy in lift pipe string operation segment processing, salvage step by step, reduce the risk of upper overhaul during lift pipe string operation；Pass through
Hydraulic slip is set, and realize carries out lower support to tubing string, overcomes string creep.
Description of the drawings
Fig. 1 is brace type water injection string structural representation of the present utility model.
Specific embodiment
Relevant detailed description of the present utility model and technology contents, coordinate description of the drawings as follows, but accompanying drawing only provides ginseng
Examine and purposes of discussion, not for being any limitation as to this utility model.
Fig. 1 is illustrated that the water injection string schematic diagram containing first water injection unit, as shown in Figure 1：The brace type note
Water pipe post, is connected in sequence by oil pipe 9, compensator 1, joint 2, the first water injection unit, the water injection unit of slips 6 and second, the
One water injection unit is connected in sequence by the first injection well downhole flow regulator 3, centralizer 4 and packer 5, and the second water injection unit is by the second injection well downhole flow regulator
7 and flushing valve 8 be connected in sequence；The upper end of compensator 1 is connected with the lower end of oil pipe 9, and the lower end of compensator 1 is connected with joint 2；
Joint 2 links together compensator 1 with the first injection well downhole flow regulator 3 of the first water injection unit, and the packer 5 of the first water injection unit passes through
Slips 6 is connected with the second injection well downhole flow regulator 7 of the second water injection unit.
In a preferred embodiment, joint 2 is left-hand tool joint, is easy in lift pipe string operation segment processing, salvages step by step,
Reduce the risk of upper overhaul during lift pipe string operation.Packer 5 can be compressive washable well packet or the closed packing of expanding
Device；In a further preferred embodiment, the first injection well downhole flow regulator 3 can be rail mounted injection well downhole flow regulator, and the second injection well downhole flow regulator 7 is alternatively rail mounted and matches somebody with somebody
Hydrophone, rail mounted injection well downhole flow regulator operation principle is：When suppressing from oil pipe 9, the piston of rail mounted injection well downhole flow regulator can be in hydraulic action
The lower top dead-centre into short track, when 9 release of oil pipe, the piston of track injection well downhole flow regulator can be changed under spring force along track
To；Afterwards, when needing water filling, water filling gate is opened, the piston of track injection well downhole flow regulator is moved on the long track of water injection pressure lower edge, is opened
Waterflood path, so as to smoothly realize water filling.Flushing valve 8 can be level pressure sand-sinking well flushing valve.Slips 6 can be hydraulic slip.
Shown in Fig. 1 is only the water injection string schematic diagram containing first water injection unit, in other embodiments, can root
According to it is required separation oil reservoir number, arrange varying number the first water injection unit, the first water injection unit quantity=required separation oil reservoir number-
1, it is sequentially connected between each first water injection unit, the bottom after each first water injection unit connection is connected with slips 6, most goes up
End is connected with joint 2.
During field conduct, master operation is：
1st, assemble, go into the well：First according to required separation oil reservoir number, the quantity of the first water injection unit is selected, by each first note
Water unit is sequentially connected.Then, compensator 1, joint 2, the first water injection unit, the water injection unit of slips 6 and second are sequentially connected
It is good, the tubing string for connecting is connected with oil pipe 9 afterwards, by entering under engineering design requirements in sleeve pipe 10.
2nd, set：Enter under tubing string after projected depth, suppress from oil pipe 9, when certain pressure is reached, slips 6 is in hydraulic pressure
Strut under effect, water injection string supports grappling by slips 6.Packer 5 sets under hydraulic action.Afterwards, the release of oil pipe 9, envelope
Sealing state is remained in that every device 5, completes to set.
3rd, inject：Water filling gate is opened, the first injection well downhole flow regulator 3, the second injection well downhole flow regulator 7 open waterflood path under water injection pressure,
Smoothly realize water filling.Injection water enters corresponding water filling interval, and water injection rate is controlled by the water nozzle on water distributor core.Compensator 1
In free retracted position, the length change that string creep causes is can compensate for, it is ensured that the position of packer 5 maintains static, so as to
Improve the stress of packer 5, improve the working life of packer 5.
4th, well-flushing：Flushing fluid is entered from oil jacket annular space, and when certain pressure is reached, packer 5 is unsealed, and flushing fluid enters envelope
Every device 5 with lower floor position, backwash passage is opened, and injection water will be returned out from oil pipe 9, and reached along this passage, Jing bottoms flushing valve 8
The purpose of cleaning oil reservoir and tubing string.Well-flushing completes to proceed to after normal water filling, the restting under hydraulic action of packer 5, realizes
Effectively separate oil reservoir in injection process.
Preferred embodiment of the present utility model is the foregoing is only, is not used to limit the scope of the claims of the present utility model, its
He all should all belong to the scope of the claims of the present utility model with the equivalence changes of patent spirit of the present utility model.
Claims (7)
1. brace type water injection string, including oil pipe, it is characterised in that：The water injection string also includes the compensator being sequentially connected, connects
Head, at least one first water injection units, slips and the second water injection unit, described compensator one end is connected with oil pipe, the other end with
The joint is connected；Wherein, first water injection unit is connected in sequence by the first injection well downhole flow regulator, centralizer and packer, institute
State the second water injection unit to be connected in sequence by the second injection well downhole flow regulator and flushing valve.
2. brace type water injection string as claimed in claim 1, it is characterised in that：The joint is left-hand tool joint.
3. brace type water injection string as claimed in claim 2, it is characterised in that：The packer is compressed washable well packing
Device or the closed packer of expanding.
4. the brace type water injection string as described in any one of claims 1 to 3, it is characterised in that：First injection well downhole flow regulator is rail
Road formula injection well downhole flow regulator.
5. brace type water injection string as claimed in claim 4, it is characterised in that：Second injection well downhole flow regulator is rail mounted water distribution
Device.
6. brace type water injection string as claimed in claim 5, it is characterised in that：The flushing valve is level pressure sand-sinking well flushing valve.
7. brace type water injection string as claimed in claim 6, it is characterised in that：The slips is hydraulic slip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621193400.XU CN206158709U (en) | 2016-10-26 | 2016-10-26 | Support formula water injection string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621193400.XU CN206158709U (en) | 2016-10-26 | 2016-10-26 | Support formula water injection string |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206158709U true CN206158709U (en) | 2017-05-10 |
Family
ID=58657853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621193400.XU Expired - Fee Related CN206158709U (en) | 2016-10-26 | 2016-10-26 | Support formula water injection string |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206158709U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108035702A (en) * | 2017-12-29 | 2018-05-15 | 中国石油大学(华东) | A kind of dismantled and assembled casing protection sets water injection string and structural optimization method |
| CN109681162A (en) * | 2018-04-19 | 2019-04-26 | 中国石油化工股份有限公司 | Anchoring compensation layered water injection method and equipment |
| CN111005703A (en) * | 2018-10-08 | 2020-04-14 | 中国石油化工股份有限公司 | Offshore oilfield separate-layer sand prevention separate-layer water injection integrated tubular column and method |
-
2016
- 2016-10-26 CN CN201621193400.XU patent/CN206158709U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108035702A (en) * | 2017-12-29 | 2018-05-15 | 中国石油大学(华东) | A kind of dismantled and assembled casing protection sets water injection string and structural optimization method |
| CN109681162A (en) * | 2018-04-19 | 2019-04-26 | 中国石油化工股份有限公司 | Anchoring compensation layered water injection method and equipment |
| CN111005703A (en) * | 2018-10-08 | 2020-04-14 | 中国石油化工股份有限公司 | Offshore oilfield separate-layer sand prevention separate-layer water injection integrated tubular column and method |
| CN111005703B (en) * | 2018-10-08 | 2021-11-30 | 中国石油化工股份有限公司 | Offshore oilfield separate-layer sand prevention separate-layer water injection integrated tubular column and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170510 Termination date: 20171026 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |