CN206309374U - A kind of pitching pressure break and closing well diffusion tubing string step by step - Google Patents
A kind of pitching pressure break and closing well diffusion tubing string step by step Download PDFInfo
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- CN206309374U CN206309374U CN201621313580.0U CN201621313580U CN206309374U CN 206309374 U CN206309374 U CN 206309374U CN 201621313580 U CN201621313580 U CN 201621313580U CN 206309374 U CN206309374 U CN 206309374U
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- tubing string
- sliding sleeve
- compression packer
- pressure break
- packer
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Abstract
The utility model belongs to oilfield horizontal well oil pipe plus sand staged fracturing renovation technique field, specifically related to a kind of pitching pressure break and closing well diffusion tubing string step by step, including oil pipe, oil pipe lower end is sequentially connected safety joint, upper compression packer, sand blower of sliding sleeve and lower compression packer, it is 2~6 grades that described sand blower of sliding sleeve is equipped with series, interior latus rectum stepped change, pitching diameter is from small to large, compared with conventional fracturing string, on the tubing string, under use compression packer, fixed tubular column, cannot unseal, closing well diffusion after pressure break can be realized, supplement the purpose of reservoir energy；Meanwhile, sand blower of sliding sleeve configuration series is 2 ~ 6 grades, and diameter ball from small to large is put into successively, enables new sand blower of sliding sleeve, sets Y341 packers, can realize that multistage is constructed by dragging tubing string；The tubing string can realize the purpose of horizontal well refracturing, diffusion, and efficiency of construction can be improved again.
Description
Technical field
The utility model belongs to oilfield horizontal well oil pipe plus sand staged fracturing renovation technique field, and in particular to one kind is step by step
Pitching pressure break and closing well diffusion tubing string.
Background technology
At present, because low permeability oil and gas field injection-production relation is difficult to clearly set up, pressure keeps level relatively low.It is right
In the low net horizontal section of portion of energy, in order to supplement reservoir energy, fracturing effect is improved, it is necessary to closing well pair after refracturing
Fracturing section carries out diffusion, supplements stratum energy.
In conventional oil pipe sand fracturing tubing string, mostly just consider that card envelope is required, it is ensured that pressure break success, do not consider pressure
Rear pressurize problem is split, pressurize 24h is even more required for a long time after conventional inflatable packer cannot meet pressure break, causes work
Skill purpose is difficult to, and shows as：One, conventional inflatable packer construction is easy certainly by the interference of bottom hole pressure surge after terminating
Dynamic deblocking, it is impossible to pressurize；Two, the interference that transformation section is vulnerable to upper and lower other transformation sections is repeated, cause pressurize difficult；Three, construction
Efficiency is low.
Utility model content
The purpose of this utility model be overcome conventional oil pipe sand fracturing tubing string cannot meet pressure break after pressurize 24h even
The requirement of longer time, the problem for causing technique purpose to be difficult to.
Therefore, the utility model provides a kind of pitching pressure break and closing well diffusion tubing string step by step, including oil pipe, described oil
Pipe lower end is sequentially connected safety joint, upper compression packer, sand blower of sliding sleeve and lower compression packer, described sliding sleeve
It is 2~6 grades that sanding machine is equipped with series, interior latus rectum stepped change, and pitching diameter is from small to large.
Between described safety joint and upper compression packer, between upper compression packer and sand blower of sliding sleeve and
Connected by tubing nipple between sand blower of sliding sleeve and lower compression packer.
Described upper compression packer and lower compression packer is hydraulic setting, above proposes the compression packing of deblocking
Device.
Described upper compression packer is Y341 type packers, and described lower compression packer is Y211 types machinery anchor
Determine packer.
This pressure break of pitching step by step and the beneficial effect of closing well diffusion tubing string that the utility model is provided：
First, upper and lower packer above carries deblocking packer using mechanical anchor, as long as fixed tubular column, packer will not
Deblocking, it can be ensured that fracturing section pressurize effect.
Second, upper packer is built the pressure and is set by pitching, circulation, and simple to operate, efficiency of construction is high.
3rd, can realize horizontal well multistage pressure break, closing well diffusion by dragging tubing string.
Brief description of the drawings
The utility model is described in further details below with reference to accompanying drawing.
Fig. 1 is structural representation of the present utility model.
Description of reference numerals：1st, oil pipe；2nd, safety joint；3rd, tubing nipple；4th, upper compression packer；5th, sliding sleeve sandblasting
Device；6th, lower compression packer.
Specific embodiment
The purpose of this utility model is to provide a kind of pitching pressure break and closing well diffusion tubing string step by step, optimizes upper and lower packer
Combination, tubing string can long-time pressurize, realize the technique purpose of closing well diffusion after pressure break, at the same can realize drag fracturing construct,
Efficiency of construction is high.
In order to realize the utility model above-mentioned purpose, using following technical scheme：
The present embodiment provides a kind of pitching pressure break and closing well diffusion tubing string step by step, as shown in figure 1, including oil pipe 1, it is described
The lower end of oil pipe 1 is sequentially connected safety joint 2, upper compression packer 4, sand blower of sliding sleeve 5 and lower compression packer 6, institute
It is 2~6 grades that the sand blower of sliding sleeve 5 stated is equipped with series, interior latus rectum stepped change, and pitching diameter is from small to large.
Between the safety joint 2 and upper compression packer 4, between upper compression packer 4 and sand blower of sliding sleeve 5 with
And connected by tubing nipple 3 between sand blower of sliding sleeve 5 and lower compression packer 6.
When in use, it is 2~6 grades that sand blower of sliding sleeve is equipped with series to the present embodiment fracturing string, and interior latus rectum stepped change is thrown
Bulb diameter is from small to large.Specific work process is as follows：
First, formation testing team completes through wash well operations as requested, under enter fracturing string, enter under tubing string is specific order for figure
In：Lower compression packer 6, tubing nipple 3, sand blower of sliding sleeve 5, tubing nipple 3, upper compression packer 4, tubing nipple 3,
Safety joint 2, oil pipe 1.
Under enter during, it is necessary to accurate measurement and in detail record oil pipe 1 and downhole tool length, it is ensured that sand blower of sliding sleeve 5
Specking position consistency is designed in position with least significant end, and both errors should be less than 0.5m, should otherwise adjust tool location；Then, above carry,
Decentralization sets lower compression packer 6, sits fracture well head, starts Frac unit, and oil pipe 1 throws the ball of minor diameter, and small displacement is just followed
Ring is implanted sequentially displacement fluid, until ball is seated on sand blower of sliding sleeve 5, oil pipe starts to build the pressure, and controls discharge capacity, slowly builds the pressure, and sits
Seal up compression packer 4.After the completion of waiting to set, continue to improve pressure, the built-in sliding sleeve of sand blower of sliding sleeve 5 is destroyed, with reservoir
Connection, oil pressure declines, and the load fluid of predetermined concentration is injected from the direct circulation of oil pipe 1, and old eyelet, importing are entered through sand blower of sliding sleeve 5
Reservoir, opens and splits, extends crack, completes this section of pressing crack construction.
After first paragraph pressure break terminates, closing well, build the pressure, according to pressure condition upper lifting pipe post, solution seals up compression packer 4,
Control discharge capacity carries out one hole volume of reacting cycle well-flushing, and when returning fluid's body is without sand grains, well head, upper lifting pipe post solution are unloaded in termination of pumping
Envelope lower compression packer 6, upper lifting pipe post to next transformation section.Above step is repeated, until all interval transformations of the well are finished,
Rise fracturing string, under enter sand washing, suction, formation testing tubing string.
Horizontal well refracturing and the fracturing string of closing well diffusion that the present embodiment is provided, by pitching, suppress and set
Compression packer 4, after sliding sleeve is destroyed in continuation pressurization, pressure break channels open.
Compared with conventional fracturing string, the tubing string is upper and lower to use compression packer, and upper compression packer 4 is with
Compression packer 6 is hydraulic setting, above carries the compression packer of deblocking, and specifically, upper compression packer 4 is Y341
Type packer, described lower compression packer 6 is Y211 type mechanical anchor packers, fixed tubular column, cannot be unsealed, Neng Goushi
Closing well diffusion, the purpose of supplement reservoir energy after existing pressure break；Meanwhile, sand blower of sliding sleeve configuration series is 2~6 grades, is put into successively
Diameter ball from small to large, enables new sand blower of sliding sleeve, sets Y341 packers, and sealing pipe column is solved successively by above carrying, dragging pipe
Post can realize that multistage is constructed；The tubing string can realize the purpose of horizontal well refracturing, diffusion, and efficiency of construction can be improved again.
In sum, this pressure break of pitching step by step of the present utility model and closing well diffusion tubing string, optimize upper and lower packer group
Close, tubing string can long-time pressurize, realize the technique purpose of closing well diffusion after pressure break, at the same can realize drag fracturing construct, apply
Work efficiency high.
Exemplified as above is only for example, not constituting to protection domain of the present utility model to of the present utility model
Limitation, every design same or analogous with the utility model is belonged within protection scope of the present invention.
Claims (4)
1. one kind pitching pressure break and closing well diffusion tubing string step by step, including oil pipe（1）, it is characterised in that：Described oil pipe（1）Lower end
It is sequentially connected safety joint（2）, upper compression packer（4）, sand blower of sliding sleeve（5）With lower compression packer（6）, it is described
Sand blower of sliding sleeve（5）It is 2~6 grades to be equipped with series, interior latus rectum stepped change, and pitching diameter is from small to large.
2. as claimed in claim 1 pitching pressure break and closing well diffusion tubing string step by step, it is characterised in that：Described safety joint
（2）With upper compression packer（4）Between, upper compression packer（4）With sand blower of sliding sleeve（5）Between and sand blower of sliding sleeve
（5）With lower compression packer（6）Between pass through tubing nipple（3）Connection.
3. as claimed in claim 1 or 2 pitching pressure break and closing well diffusion tubing string step by step, it is characterised in that：Described upper compression
Formula packer（4）With lower compression packer（6）It is hydraulic setting, above carries the compression packer of deblocking.
4. as claimed in claim 3 pitching pressure break and closing well diffusion tubing string step by step, it is characterised in that：Described upper compression envelope
Every device（4）It is Y341 type packers, described lower compression packer（6）It is Y211 type mechanical anchor packers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621313580.0U CN206309374U (en) | 2016-12-02 | 2016-12-02 | A kind of pitching pressure break and closing well diffusion tubing string step by step |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621313580.0U CN206309374U (en) | 2016-12-02 | 2016-12-02 | A kind of pitching pressure break and closing well diffusion tubing string step by step |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206309374U true CN206309374U (en) | 2017-07-07 |
Family
ID=59249619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621313580.0U Active CN206309374U (en) | 2016-12-02 | 2016-12-02 | A kind of pitching pressure break and closing well diffusion tubing string step by step |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206309374U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114607318A (en) * | 2022-03-24 | 2022-06-10 | 中煤科工集团西安研究院有限公司 | Fracturing cooperative construction method for combined production and drilling of multi-layer horizontal well for deep coal bed methane |
-
2016
- 2016-12-02 CN CN201621313580.0U patent/CN206309374U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114607318A (en) * | 2022-03-24 | 2022-06-10 | 中煤科工集团西安研究院有限公司 | Fracturing cooperative construction method for combined production and drilling of multi-layer horizontal well for deep coal bed methane |
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