CN206309294U - Small-displacement horizontal well dragging fracturing string - Google Patents
Small-displacement horizontal well dragging fracturing string Download PDFInfo
- Publication number
- CN206309294U CN206309294U CN201621313653.6U CN201621313653U CN206309294U CN 206309294 U CN206309294 U CN 206309294U CN 201621313653 U CN201621313653 U CN 201621313653U CN 206309294 U CN206309294 U CN 206309294U
- Authority
- CN
- China
- Prior art keywords
- horizontal well
- packer
- oil pipe
- fracturing
- tubing string
- Prior art date
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Links
- 238000006073 displacement reaction Methods 0.000 title claims description 24
- 239000004576 sand Substances 0.000 abstract description 6
- 230000009466 transformation Effects 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 210000002445 nipple Anatomy 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 239000009096 changqing Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model belongs to the technical field of oil field horizontal well oil pipe adds sand staged fracturing and reforms transform, specifically provide a small discharge capacity horizontal well drags fracturing string, including oil pipe, its characterized in that: small discharge capacity horizontal well drags fracturing string still including locating the safety joint of oil pipe lower extreme in proper order, going up packer, throttle sand blaster and bottom packer, safety joint and last packer, go up packer and throttle sand blaster all connect through the oil pipe short circuit, satisfy horizontal well repeated transformation small discharge capacity fracturing demand, easy operation, construction safety can realize dragging the fracturing simultaneously, and is efficient.
Description
Technical field
The utility model belongs to oilfield horizontal well oil pipe plus sand staged fracturing renovation technique field, and in particular to a kind of float
Amount horizontal well drag fracturing tubing string.
Background technology
At present, the repetition transformation of Changqing oilfields low permeability oil field horizontal well is main using double envelope single deck tape-recorder dragging tubing string segmentation pressures
Split.Compared to other techniques, such tubing string card sealing section substantially, can eliminate as much as the influence for closing on interval, correctional effect compared with
It is good.
In conventional double envelope single deck tape-recorder drag fracturing tubing strings, the setting of upper packer, deblocking process are more complicated, or even needs
Pitching, the operation such as build the pressure.For the reservoir reconstruction of small displacement, conventional tubing string efficiency is low, and operation is relative complex, and easily bit freezing.
Utility model content
The purpose of this utility model is to provide a kind of small displacement horizontal well drag fracturing tubing string, and optimization tool combination meets
Horizontal well repeats transformation small displacement pressure break demand, simple to operate, construction safety, while drag fracturing, efficiency high can be realized.
Therefore, the utility model provides a kind of small displacement horizontal well drag fracturing tubing string, including oil pipe, the small displacement
Horizontal well drag fracturing tubing string also includes being sequentially arranged in the safety joint of oil pipe lower end, upper packer, throttling sanding machine and bottom
Packer, the safety joint and upper packer, upper packer and throttling sanding machine are connected by oil pipe short circuit.
Described upper packer is K344 packers.
Described upper packer produces chock pressure difference to set by the sanding machine that throttles.
The throttling sanding machine is used to throttle and connects reservoir reconstruction section.
Described bottom packer is Y211 mechanical anchor packers.
The beneficial effects of the utility model：This small displacement horizontal well drag fracturing tubing string that the utility model is provided, bag
Include oil pipe, the small displacement horizontal well drag fracturing tubing string also include being sequentially arranged in the safety joint of oil pipe lower end, upper packer,
Throttling sanding machine and bottom packer, the safety joint and upper packer, upper packer and throttling sanding machine pass through oil pipe
Short circuit is connected.The small displacement horizontal well drag fracturing tubing string upper packer is set by the chock pressure difference that the sanding machine that throttles is produced,
It is not required to operation bidirectional, tubing string is integrally unsealed conveniently, and pressure break passage is unimpeded always, it is not necessary to which pitching such as builds the pressure at the process, and tubing string is especially
Suitable for horizontal well small displacement multistage fracturing reform, efficiency of construction is high, bit freezing risk is small.
Brief description of the drawings
The utility model is described in further details below with reference to accompanying drawing.
Fig. 1 is small displacement horizontal well drag fracturing tubular column structure schematic diagram.
Description of reference numerals：1st, oil pipe；2nd, safety joint；3rd, tubing nipple；4th, K344 packers；5th, throttle sanding machine；
6th, Y211 mechanical anchors packer.
Specific embodiment
Embodiment 1：
As shown in figure 1, a kind of small displacement horizontal well drag fracturing tubing string, including oil pipe 1, the small displacement horizontal well dragging
Fracturing string also includes being sequentially arranged in the safety joint 2 of oil pipe lower end, upper packer 4, throttling sanding machine 5 and bottom packer 6,
The safety joint 2 and upper packer 4, upper packer 4 and throttling sanding machine 5 are connected by oil pipe short circuit 3；Described upper envelope
Every device 4 be K344 packers；Described bottom packer 6 is Y211 mechanical anchor packers.Compared with conventional fracturing string, should
Tubular column structure is simple, easy to operate, and by directly above carrying whole time tubing string of deblocking, dragging tubing string is constructed, and efficiency high, risk are small.
Embodiment 2：
As shown in figure 1, on the basis of embodiment 1, described upper packer 4 produces throttling pressure by the sanding machine 5 that throttles
Difference sets, and the throttling sanding machine 5 is used to throttle and connects reservoir reconstruction section；Pressure break passage is unimpeded always, it is not necessary to which pitching is suppressed
Pressure sets up pressure break passage；Tubing string operational discharge capacity is limited, and the tubing string is particularly suited for horizontal well small displacement multistage fracturing reform.
Operation principle of the present utility model is：
First, formation testing team completes through wash well operations as requested, under enter fracturing string, order is entered under tubing string is specific for Fig. 1
It is shown：Y211 mechanical anchors packer 6, throttling sanding machine 5, oil pipe short circuit 3, K344 packers 4, tubing nipple 3, safety joint
2nd, 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 the position of sanding machine 5
Specking position consistency is designed with least significant end, both errors should be less than 0.5m, should otherwise adjust tool location；Then, put-on and delegated
Y211 packers 6 are set, fracture well head is sat, starts Frac unit, small displacement direct circulation is implanted sequentially displacement fluid, improved discharge capacity and sit
Envelope K344 packers 4, the load fluid of predetermined concentration is injected from the direct circulation of oil pipe 1, and through throttling, sanding machine 5 enters old eyelet, importing
Reservoir, opens and splits, extends crack, completes this section of pressing crack construction.
After first paragraph pressure break terminates, according to pressure condition upper lifting pipe post or backwash, deblocking K344 packers 4 control discharge capacity
One hole volume of reacting cycle well-flushing is carried out, when returning fluid's body is without sand grains, well head, upper lifting pipe post deblocking Y211 machines are unloaded in termination of pumping
Tool anchoring packer 6, upper lifting pipe post to next transformation section.
Repeat above step, until the transformation of the well all intervals is finished, act fracturing string, under enter sand washing, suction, formation testing
Tubing string.
In sum, the utility model compared with prior art, with advantages below：
First, upper packer is set by the chock pressure difference that the sanding machine that throttles is produced, and pressure break passage is unimpeded always, it is not necessary to
Pitching builds the pressure and sets up pressure break passage.
Second, by directly above carrying whole time tubing string of deblocking, dragging tubing string is constructed, and efficiency high, risk are small
3rd, because sanding machine needs to set K344 packers by throttling action, tubing string operational discharge capacity is limited, the tubing string
It is particularly suited for horizontal well small displacement multistage fracturing reform.
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 (5)
1. a kind of small displacement horizontal well drag fracturing tubing string, including oil pipe (1), it is characterised in that：The small displacement horizontal well is dragged
Dynamic fracturing string also includes being sequentially arranged in safety joint (2), upper packer (4), throttling sanding machine (5) and the bottom of oil pipe lower end
Packer (6), the safety joint (2) and upper packer (4), upper packer (4) and throttling sanding machine (5) are short by oil pipe
Connect (3) connection.
2. small displacement horizontal well drag fracturing tubing string as claimed in claim 1, it is characterised in that：Described upper packer (4)
It is K344 packers.
3. small displacement horizontal well drag fracturing tubing string as claimed in claim 2, it is characterised in that：Described upper packer (4)
Chock pressure difference is produced to set by the sanding machine that throttles (5).
4. small displacement horizontal well drag fracturing tubing string as claimed in claim 3, it is characterised in that：Throttling sanding machine (5)
For throttling and connecting reservoir reconstruction section.
5. small displacement horizontal well drag fracturing tubing string as claimed in claim 1, it is characterised in that：Described bottom packer
(6) it is Y211 mechanical anchor packers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621313653.6U CN206309294U (en) | 2016-12-02 | 2016-12-02 | Small-displacement horizontal well dragging fracturing string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621313653.6U CN206309294U (en) | 2016-12-02 | 2016-12-02 | Small-displacement horizontal well dragging fracturing string |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206309294U true CN206309294U (en) | 2017-07-07 |
Family
ID=59249733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621313653.6U Active CN206309294U (en) | 2016-12-02 | 2016-12-02 | Small-displacement horizontal well dragging fracturing string |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206309294U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110847875A (en) * | 2019-11-19 | 2020-02-28 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Short-time throttling pipe column and short-time throttling method |
-
2016
- 2016-12-02 CN CN201621313653.6U patent/CN206309294U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110847875A (en) * | 2019-11-19 | 2020-02-28 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Short-time throttling pipe column and short-time throttling method |
| CN110847875B (en) * | 2019-11-19 | 2023-12-05 | 中国石油天然气集团有限公司 | Short-time throttling pipe column and short-time throttling method |
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| GR01 | Patent grant |