CN208564457U - A kind of horizontal well multistage fracturing tubing string - Google Patents
A kind of horizontal well multistage fracturing tubing string Download PDFInfo
- Publication number
- CN208564457U CN208564457U CN201821209670.4U CN201821209670U CN208564457U CN 208564457 U CN208564457 U CN 208564457U CN 201821209670 U CN201821209670 U CN 201821209670U CN 208564457 U CN208564457 U CN 208564457U
- Authority
- CN
- China
- Prior art keywords
- string
- fracturing
- oil pipe
- horizontal well
- packer
- 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
Links
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The utility model discloses a kind of horizontal well multistage fracturing tubing string, is related to offshore petroleum industry technical field of underground.The tubing string includes the lower part fracturing string in the top flow string and horizontal well being arranged in Vertical Well, top flow string can be connected to lower part fracturing string, one end of automatic grouting equipment is connect with lower part oil pipe far from one end of top oil pipe, and automatic grouting equipment can make the pressure balance inside and outside the fracturing string of lower part when opening；The connection of the other end of press-cutting pipe nipple and automatic grouting equipment, press-cutting pipe nipple energy sealed lower portion fracturing string；Plug-in type packer connect with lower part oil pipe and is positioned close at the oil pipe of top, the borehole wall of Vertical Well and horizontal well junction can be sealed by plug-in type packer, and top flow string can be inserted into plug-in type packer to realize the sealed connection of top flow string and lower part fracturing string.The tubing string tripping in is easier, and is suppressed and is set conveniently, structurally reasonable, duty cycle is short.
Description
Technical field
The utility model relates to offshore petroleum industry technical field of underground more particularly to a kind of horizontal well multistage fracturings
Tubing string.
Background technique
Currently, land untraditional reservoir is developed there are two types of common horizontal well multistage fracturing tubing strings, respectively using naked
The classification sandblasting tubing string and coiled tubing of intraocular packer and pitching sliding sleeve drag hydraulic sand blasting multistage fracturing tubing string.For
The first tubing string requires height for borehole wall stability, and open hole packer easily scratches its cartridge during tripping in,
It cannot achieve complete Inter-zonal packing in the case of hole anomaly, particularly with marine unconventional Reservoir Development, risk is big, makees
The industry period is long, operating cost is high.For second of tubing string, for land untraditional reservoir well depth in 4000m or more, coiled tubing is easy
It drags, needs tripping in flow string again after pressure break, duty cycle is long, and is more than for marine untraditional reservoir well depth
4500m, coiled tubing dragging is difficult, and fluid infusion is nervous, the non-depressed production integrated tubing string of schizogenesis, and operating cost is high, is unable to satisfy sea
The exploitation of untraditional reservoir economical and effective.
Utility model content
In view of the above-mentioned problems, the utility model proposes a kind of horizontal well multistage fracturing tubing string, tubing string tripping in is easier, suppresses
It sets conveniently, structurally reasonable, duty cycle is short.
The utility model uses following technical scheme:
A kind of horizontal well multistage fracturing tubing string, comprising: be arranged in top flow string and the horizontal well in Vertical Well
Lower part fracturing string, top flow string can be connected to lower part fracturing string, and top flow string includes top oil pipe, lower part pressure
Splitting tubing string includes the more set pitching fracturing sliding bushs and more set zone isolation packers on lower part oil pipe and lower part oil pipe, pitching pressure break
Sliding sleeve (3) and the setting of zone isolation packer (4) interval, further includes:
One end of automatic grouting equipment, automatic grouting equipment is connect with lower part oil pipe far from one end of top oil pipe, automatically
Provisions for grouting can make the pressure balance inside and outside the fracturing string of lower part when opening；
The other end of press-cutting pipe nipple, press-cutting pipe nipple and automatic grouting equipment connects, and press-cutting pipe nipple can be close
Seal lower part fracturing string；
Plug-in type packer, plug-in type packer connect and are positioned close at the oil pipe of top, plug-in type with lower part oil pipe
The borehole wall of Vertical Well and horizontal well junction can be sealed by packer, top flow string can be inserted into plug-in type packer with
Realize the sealed connection of top flow string and lower part fracturing string.
It further include the permanent packer being arranged on the oil pipe of top, forever as a kind of preferred embodiment of the utility model
Long formula packer can be with Vertical Well Well-wall sealer.
As a kind of preferred embodiment of the utility model, top oil pipe is provided with guiding close to one end of lower part oil pipe and draws
Shoes.
As a kind of preferred embodiment of the utility model, top oil pipe is provided with sealing element close to one end of lower part oil pipe,
Sealing element can be bonded the sealed connection for realizing top flow string and lower part fracturing string with plug-in type packer.
As a kind of preferred embodiment of the utility model, storm valve is additionally provided on the oil pipe of top.
As a kind of preferred embodiment of the utility model, zone isolation packer is provided with ten sets, and pitching fracturing sliding bush is set
It is equipped with nine sets.
As a kind of preferred embodiment of the utility model, it is provided with shear pin on press-cutting pipe nipple, when permanent type seals
When device sets completion, shear pin is sheared.
As a kind of preferred embodiment of the utility model, it is multistage that the maximum shear pressure of press-cutting pipe nipple is less than horizontal well
The anti-internal pressure of fracturing string.
As a kind of preferred embodiment of the utility model, zone isolation packer, plug-in type packer and permanent type packing
The maximum of device sets pressure less than the anti-internal pressure of automatic grouting equipment and the minimum shear pressure of press-cutting pipe nipple completely.
As a kind of preferred embodiment of the utility model, lower part pipe aperture is greater than top pipe aperture.
The utility model has the following beneficial effects:
The utility model proposes a kind of horizontal well multistage fracturing tubing string, by be arranged automatic grouting equipment lower part is pressed
Split the pressure balance that tubing string is able to maintain inside and outside tubing string during tripping in, and automatic grouting equipment can reacting cycle, ensure that down
The well control safety of portion's fracturing string tripping in process；By the way that press-cutting pipe nipple is arranged, so that each packer of tubing string is being set
In the process, can guarantee to seal tubing string；By the way that plug-in type packer is arranged, top flow string and lower part pressure break pipe can be realized
Sealed connection between column, it is structurally reasonable, it is operation safety, high-quality and efficient.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of horizontal well multistage fracturing tubing string provided by the utility model.
In figure:
1, top oil pipe；2, lower part oil pipe；3, pitching fracturing sliding bush；4, zone isolation packer；5, automatic grouting equipment；
6, press-cutting pipe nipple；7, plug-in type packer；8, permanent packer；9, it is oriented to guide shoe；10, sealing element；11, downhole safety
Valve；
100, Vertical Well；200, horizontal well.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.It is understood that herein
Described specific embodiment is used only for explaining the utility model, rather than the restriction to the utility model.It further needs exist for
It is bright, part relevant to the utility model is illustrated only for ease of description, in attached drawing rather than entire infrastructure.
Fig. 1 is the structural schematic diagram of horizontal well multistage fracturing tubing string provided by the utility model, which mainly includes setting
Set the lower part fracturing string (pipe individually described hereinafter in the top flow string and horizontal well 200 in Vertical Well 100
Column is that top flow string with lower part fracturing string connects the overall structure to be formed), wherein top flow string mainly includes
Top oil pipe 1 and the storm valve 11 being successively set on top oil pipe 1, permanent packer 8, guiding guide shoe 9 and sealing
Part 10；Lower part fracturing string mainly includes lower part oil pipe 2 and the plug-in type packer 7 being successively set on lower part oil pipe 2, pitching
Fracturing sliding bush 3, zone isolation packer 4, automatic grouting equipment 5 and press-cutting pipe nipple 6.Wherein, oil pipe 2 internal diameter in lower part is greater than
1 internal diameter of top oil pipe.
Specifically, in lower part fracturing string lower going-into-well first, lower part oil pipe 2 is arranged at intervals with more set pitching fracturing sliding bushs 3
Cover zone isolation packers 4 with, preferably zone isolation packer 4 is provided with ten sets in the present embodiment, and pitching fracturing sliding bush 3 is set more
Nine sets are equipped with, as soon as a sealing space, ten sets of zone isolation packers 4 are formed between that is, two neighboring zone isolation packer 4
Nine sealing spaces are formd, nine sets of pitching fracturing sliding bushs 3 are arranged at the corresponding position of nine sealing spaces, horizontal when carrying out
When fracturing work, the correspondence of pitching fracturing sliding bush 3 is separately turned on, and is successively applied pressure to nine sealing spaces with fracturing stratum, is received
Collect the acquisition target such as oil gas.
Further, automatic grouting equipment 5, automatic grouting dress are connected with far from one end of top oil pipe 1 in lower part oil pipe 2
It is opening state during 5 are set in the fracturing string lower going-into-well of lower part, automatic grouting equipment 5 at this time can be used as counter follow
Ring channel, so that the pressure balance inside and outside tubing string, on the one hand ensure that well control safety of lower part fracturing string during tripping in,
On the other hand the risk that each packer is surprisingly set can be eliminated, improves operation safety and efficiency.Further, automatic to fill
The other end of sizing device 5 connects press-cutting pipe nipple 6, i.e. press-cutting pipe nipple 6 is the most end end pieces on tubing string tripping in direction,
After lower part fracturing string tripping in reaches designated position, the other side of press-cutting pipe nipple 6 is exactly the end of horizontal well 200.Pressure
The effect that power shears pipe nipple 6 is sealed lower portion fracturing string during setting each packer.Specifically, when lower part is pressed
After splitting tubing string tripping in arrival designated position, tubing string internal pressurization closes automatic grouting equipment 5, and press-cutting pipe nipple 6 will at this time
Channel sealing in lower part oil pipe 2, so that will not be entered in horizontal well annular space to the pressure pressurizeed in lower part oil pipe 2.Pressure
It is additionally provided with shear pin on power shearing pipe nipple 6, when permanent packer 8 sets completion, is pressurizeed in tubing string, so that shearing
Pin is sheared, and the space between the zone isolation packer 4 of least significant end and the end of horizontal well 200 is connected at this time, at this
Another enclosure space is formed, pressure is applied with fracturing stratum to the enclosure space, the acquisition target such as oil gas is collected, improves work
Industry efficiency.
Further, lower part oil pipe 2 is connected with plug-in type packer 7, plug-in type packer close to one end of top oil pipe 1
7 there are two effect, and an effect is to be sealed the borehole wall of Vertical Well and horizontal well junction, another is functioned as
Connector enables top flow string to be inserted into plug-in type packer 7 to realize top flow string and lower part fracturing string
It is tightly connected.Specifically, the sealing of plug-in type packer 7 and the 200 junction borehole wall of Vertical Well 100 and horizontal well is to pass through lower part
Pressurization is realized in fracturing string；And sealing element 10 is provided on top oil pipe 1, sealing element 10 can be inserted into plug-in type packer 7
The sealed connection of top flow string and lower part fracturing string is realized in fitting.Preferably, top oil pipe 1 is close to lower part oil pipe 2
One end is provided with guiding guide shoe 9, and the sealing element 10 of top flow string during being inserted into plug-in type packer 7, draw by guiding
Shoes 9 can play guiding role, so that insertion process is more acurrate, more convenient operation.
Further, permanent packer 8 is provided on top oil pipe 1, permanent packer 8 can be with 100 well of Vertical Well
Wall contacts and realizes sealing.Storm valve 11 is additionally provided on top oil pipe 1, to guarantee the safety in production process.
Further, one of the key problem due to tubing string in underground is rationally and effectively to sit each packer
Envelope, meanwhile, what the course of work including tubing string was realized with applying different size of pressure, therefore, it is also desirable to each structure
The pressure of part is defined, and specifically includes that the maximum shear pressure of press-cutting pipe nipple 6 is less than horizontal well multistage fracturing tubing string
Anti- internal pressure, this arrangement ensure that the intensity of tubing string is unaffected when press-cutting pipe nipple 6 is sheared；Zone isolation packer
4, the maximum of plug-in type packer 7 and permanent packer 8 sets anti-internal pressure and pressure that pressure is less than automatic grouting equipment 5 completely
Power shears the minimum shear pressure of pipe nipple 6, and this set makes automatic grouting equipment 5 after closing, applies to each packer
During pressure realization is set, the intensity of automatic grouting equipment 5 is unaffected, and will not shear pressure shearing pipe nipple 6 cut
Cut pin.Restriction to above-mentioned pressure, main purpose are, under the premise of not influencing the realization of each instrumental function, maximum journey
Pull open pressure duty design value to degree, it is ensured that each pressure operation only triggers a kind of instrumental function.
The course of work of horizontal well multistage fracturing tubing string provided by the utility model are as follows:
The first step, by the fracturing string lower going-into-well of lower part, automatic grouting equipment 5 is open at this time, automatic grouting equipment 5
It can be used as reacting cycle channel, so that the pressure balance inside and outside the fracturing string of lower part, ensure that lower part fracturing string in tripping in
Well control safety in journey, while eliminating the risk that each packer is surprisingly set；
Second step pressurizes, so that automatically after lower part fracturing string tripping in reaches designated position in the fracturing string of lower part
Provisions for grouting 5 is closed, then to suppressing at annular space, determines the closing of automatic grouting equipment 5；
Third step is pressurizeed in the fracturing string of lower part, completes multiple zone isolation packers 4 and plug-in type packer 7
Initial sealing；
4th step, by lifting from the top and puting down lower part fracturing string, after verifying 7 slips of plug-in type packer work, applied pressure by annulus
Verify the leakproofness of plug-in type packer 7；
5th step is just being pressurizeed in the fracturing string of lower part, so that plug-in type packer 7 is set completely, while being slipped out of the hand and being set
Service aid；
Top flow string tripping in is inserted into plug-in type packer 7 by the 6th step afterwards in place, realizes top flow string
With the sealed connection of lower part fracturing string；
7th step, the interior pressurization of tubing string set permanent packer 8；
8th step, for the interior pressurization of tubing string so that the shear pin on press-cutting pipe nipple 6 is sheared, it is more that tubing string is transferred to horizontal well
Grade fracturing work.
The utility model proposes a kind of horizontal well multistage fracturing tubing string, tubing string tripping in is easier, and is suppressed and is set conveniently, structure
Rationally, duty cycle is short.
Note that above are only the preferred embodiment and institute's application technology principle of the utility model.Those skilled in the art's meeting
Understand, the utility model is not limited to specific embodiment here, is able to carry out for a person skilled in the art various apparent
Variation is readjusted and is substituted without departing from the protection scope of the utility model.Therefore, although by above embodiments to this
Utility model is described in further detail, but the utility model is not limited only to above embodiments, is not departing from this reality
It can also include more other equivalent embodiments in the case where with novel design, and the scope of the utility model is by appended power
Sharp claimed range determines.
Claims (10)
1. a kind of horizontal well multistage fracturing tubing string, comprising: the top flow string and horizontal well being arranged in Vertical Well (100)
(200) the lower part fracturing string in, the top flow string can be connected to the lower part fracturing string, the top production pipe
Column includes top oil pipe (1), and the lower part fracturing string includes more set pitching pressures on lower part oil pipe (2) and lower part oil pipe (2)
Sliding sleeve (3) and more sets zone isolation packer (4) are split, between the pitching fracturing sliding bush (3) and the zone isolation packer (4)
Every setting, which is characterized in that further include:
Automatic grouting equipment (5), one end of the automatic grouting equipment (5) and the lower part oil pipe (2) are far from the top oil
One end connection of (1) is managed, the automatic grouting equipment (5) can make the pressure inside and outside the lower part fracturing string flat when opening
Weighing apparatus；
Press-cutting pipe nipple (6), the press-cutting pipe nipple (6) connect with the other end of the automatic grouting equipment (5), described
Press-cutting pipe nipple (6) can seal the lower part fracturing string；
Plug-in type packer (7), the plug-in type packer (7) connect with the lower part oil pipe (2) and are positioned close to described
At top oil pipe (1), the plug-in type packer (7) can be by the Vertical Well (100) and the horizontal well (200) junction
The borehole wall is sealed, and the top flow string can be inserted into the plug-in type packer (7) to realize top flow string under
The sealed connection of portion's fracturing string.
2. horizontal well multistage fracturing tubing string according to claim 1, which is characterized in that further include being arranged in top oil pipe
(1) permanent packer (8) on, the permanent packer (8) can be with Vertical Well (100) Well-wall sealers.
3. horizontal well multistage fracturing tubing string according to claim 2, which is characterized in that the top oil pipe (1) is close to institute
The one end for stating lower part oil pipe (2) is provided with guiding guide shoe (9).
4. horizontal well multistage fracturing tubing string according to claim 3, which is characterized in that the top oil pipe (1) is close to institute
The one end for stating lower part oil pipe (2) is provided with sealing element (10), and the sealing element (10) can be bonded with the plug-in type packer (7)
Realize the sealed connection of top flow string and lower part fracturing string.
5. horizontal well multistage fracturing tubing string according to claim 4, which is characterized in that also set on the top oil pipe (1)
It is equipped with storm valve (11).
6. horizontal well multistage fracturing tubing string according to claim 1, which is characterized in that the zone isolation packer (4)
Ten sets are provided with, the pitching fracturing sliding bush (3) is provided with nine sets.
7. horizontal well multistage fracturing tubing string according to claim 2, which is characterized in that on the press-cutting pipe nipple (6)
It is provided with shear pin, when the permanent packer (8) sets completion, the shear pin is sheared.
8. horizontal well multistage fracturing tubing string according to claim 7, which is characterized in that the press-cutting pipe nipple (6)
Maximum shear pressure is less than the anti-internal pressure of the horizontal well multistage fracturing tubing string.
9. horizontal well multistage fracturing tubing string according to claim 8, which is characterized in that the zone isolation packer (4),
The maximum of the plug-in type packer (7) and the permanent packer (8) sets pressure completely and fills less than the automatic grouting
Set the anti-internal pressure of (5) and the minimum shear pressure of press-cutting pipe nipple (6).
10. horizontal well multistage fracturing tubing string according to claim 1, which is characterized in that lower part oil pipe (2) internal diameter is big
In top oil pipe (1) internal diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821209670.4U CN208564457U (en) | 2018-07-27 | 2018-07-27 | A kind of horizontal well multistage fracturing tubing string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821209670.4U CN208564457U (en) | 2018-07-27 | 2018-07-27 | A kind of horizontal well multistage fracturing tubing string |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208564457U true CN208564457U (en) | 2019-03-01 |
Family
ID=65448638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821209670.4U Expired - Fee Related CN208564457U (en) | 2018-07-27 | 2018-07-27 | A kind of horizontal well multistage fracturing tubing string |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208564457U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111810106A (en) * | 2020-08-05 | 2020-10-23 | 中国石油天然气股份有限公司 | Three-inch half-slim hole sidetrack horizontal well efficient staged fracturing method |
| CN111852428A (en) * | 2020-08-03 | 2020-10-30 | 中国石油天然气股份有限公司 | Method for fracturing outer packing and coiled tubing in combined operation |
-
2018
- 2018-07-27 CN CN201821209670.4U patent/CN208564457U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111852428A (en) * | 2020-08-03 | 2020-10-30 | 中国石油天然气股份有限公司 | Method for fracturing outer packing and coiled tubing in combined operation |
| CN111810106A (en) * | 2020-08-05 | 2020-10-23 | 中国石油天然气股份有限公司 | Three-inch half-slim hole sidetrack horizontal well efficient staged fracturing method |
| CN111810106B (en) * | 2020-08-05 | 2022-08-30 | 中国石油天然气股份有限公司 | Three-inch half-slim hole sidetrack horizontal well efficient staged fracturing method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103306643B (en) | A kind of water drainage gas production device and method | |
| CN109630060A (en) | A kind of complete well operation tubing string of repeatable no killing well and construction technology | |
| CN104234638B (en) | Cased hole completion multistage pressure break horizontal well machinery searching pipe column and its groundwater prospecting method | |
| CN202578634U (en) | Switching type rail sealing sliding sleeve | |
| CN208564457U (en) | A kind of horizontal well multistage fracturing tubing string | |
| CN103912257B (en) | A kind of dragging multiple fracturing device with pressure | |
| CN106050199A (en) | Synthetic drainage and gas production device and method | |
| CN203685139U (en) | Integrated pipe column for perforation, fracture and oil extraction for directional well on the sea | |
| CN104196492B (en) | A kind of dragging down-hole plugging valve with pressure | |
| CN203362145U (en) | Fracturing and sand prevention integrated completion pipe column | |
| CN207004498U (en) | Infinite stages switching sliding sleeve fracturing tool | |
| CN203939477U (en) | A kind of formation testing and completion practice integrated pipe column | |
| CN106014370A (en) | Oil-pipe under-pressure dragging fracturing device and technology | |
| CN103452496B (en) | Integral type of adopting thick oil thermal extraction note automatically switches and produces joint | |
| CN204386577U (en) | The protective jacket in sliding sleeve fracturing hole and sliding sleeve | |
| CN205422621U (en) | A two packing element packers that segmentation card sealed in was used for big thick -layer | |
| CN106401537A (en) | Well completion pipe string of underground gas storage well and well completion method | |
| CN204266988U (en) | A kind of pilot-controlled switch sliding sleeve | |
| CN204082115U (en) | Based on the horizontal well volume fracturing tubing string of conventional oil pipe dragging with pressure | |
| CN200985782Y (en) | Operating tool string for gas well fracturing and production put | |
| CN103321626B (en) | A kind of fracturing sand control integration completion tubular column and application process thereof | |
| CN205297515U (en) | Coiled tubing drags hydraulic jet fracturing device | |
| CN105089524B (en) | A kind of with pressure goes out applications of coiled tubing unit and process | |
| CN203847100U (en) | Remote pressure display system for cable blowout preventing device | |
| CN203822281U (en) | Under-pressure dragging type separate-layer fracturing device |
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: 20190301 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |