CN204492783U - A kind of well cementation fracturing technology tubing string - Google Patents
A kind of well cementation fracturing technology tubing string Download PDFInfo
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- CN204492783U CN204492783U CN201420503596.2U CN201420503596U CN204492783U CN 204492783 U CN204492783 U CN 204492783U CN 201420503596 U CN201420503596 U CN 201420503596U CN 204492783 U CN204492783 U CN 204492783U
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Abstract
The utility model discloses a kind of well cementation fracturing technology tubing string.Described well cementation fracturing technology tubing string, comprises from bottom to top successively: float shoe, float collar, impacting seat, well cementation pressure reduction sliding sleeve and well cementation pitching sliding sleeve, and described float shoe, float collar, impacting seat, well cementation pressure reduction sliding sleeve are connected through sleeve pipe with well cementation pitching sliding sleeve; Described well cementation pressure reduction sliding sleeve is provided with constant pressure valve.Well cementation fracturing technology tubing string rigidity disclosed in the utility model is little, under enter stratum convenience very, and packing effect is better.
Description
Technical field
The utility model relates to the well-completing process field of petroleum industry, especially a kind of well cementation fracturing technology tubing string.
Background technology
Along with the exploitation of the projects such as unconventionaloil pool Tibetan and shale gas, stimulation technology receives more concern and research in oil field development.
At present, oil field at home cased well multistage fracturing reform mode mainly contains three major types: one is bore hole staged fracturing technology, utilizes the packing that open hole packer realizes between interval, completes multistage fracturing transformation by opening fracturing sliding bush successively; Two is hydraulic jetting fracturing technology, utilizes hydraulic jetting fracturing instrument to carry out hydraulic perforation, realizes Inter-zonal packing by hydraulic jet effect, sprays pressure break and completes multistage transformation; Three is bridging plug+perforating technologies, on sleeve pipe after perforation, is realized the renovation technique of infinite stages by bridging plug.For different oil reservoir situation and requirement, these three kinds of renovation techniques are obtained for be applied widely.
Bore hole staged fracturing technology and hydraulic jetting fracturing technology, can realize completion pressure break one-trip string, but technological operation relative complex, when classification is more, the rigidity of tubing string is comparatively large, and require high to well, barefoot completion, is not suitable for hole instability stratum; The packing of open hole packer to water layer is limited in one's ability, by the structure influence of tubing string, and follow-up secondary transformation limited space.
The progression of bridging plug+perforating technology segmentation is unrestricted, and bridging plug can bore and can realize full-bore, but complex process, difficulty of construction is comparatively large, and the cycle of construction is long, and fracturing fluid is long in the time of staying of reservoir, large to reservoir damage.
Therefore, need to provide a kind of novel well cementation fracturing technology tubing string.
Utility model content
The purpose of this utility model is to provide a kind of Novel cementing fracturing technology tubing string, require low to well, pass through casing cementing, effective packing can be carried out to drop ply and water layer, pressure break can be positioned accurately to reservoir fracturing point simultaneously, after pressure break completes, the ball seat except sliding sleeve can be bored, realize the full-bore of sleeve pipe, for later technical measures provide space.
The purpose of this utility model and solve its technical problem and realize by the following technical solutions.
By one well cementation fracturing technology tubing string, described well cementation fracturing technology tubing string comprises from bottom to top successively: float shoe, float collar, impacting seat, well cementation pressure reduction sliding sleeve and well cementation pitching sliding sleeve, and described float shoe, float collar, impacting seat, well cementation pressure reduction sliding sleeve are connected through sleeve pipe with well cementation pitching sliding sleeve; Described well cementation pressure reduction sliding sleeve is provided with constant pressure valve.
Preferably, the number of described well cementation pitching sliding sleeve is two or more.
Preferably, described well cementation pressure reduction sliding sleeve comprises housing and is arranged on the inner sliding sleeve in described housing, and described inner sliding sleeve slides axially in described housing; Described housing comprises upper shell and lower house; At least one flowing hole is provided with at the top of described inner sliding sleeve; The sidewall of described inner sliding sleeve is provided with constant pressure valve and sliding sleeve boss, and described constant pressure valve is arranged on the sidewall of the described inner sliding sleeve below described upper shell, and described sliding sleeve boss is arranged on below described low pressure valve; Between described upper shell and described lower house, be provided with the first seal, between described sliding sleeve boss and described lower house, be provided with the second seal.
Preferably, described upper shell and described lower house are through to be threaded and/or static determinacy screw is connected.
Preferably, in described flowing hole, full-bodied grease is provided with.
Preferably, described lower house lower end is provided with positive stop lug boss, between described inner sliding sleeve and described positive stop lug boss, be provided with spacing back-up ring.
Preferably, between described inner sliding sleeve and described positive stop lug boss, the 3rd seal is also provided with.
Preferably, described upper shell is provided with pressure break hole, is respectively equipped with the 4th seal and the 5th seal in the inner side of described upper shell, described 4th seal and the 5th seal are separately positioned on the both sides up and down in described pressure break hole.
By technique scheme, the one well cementation fracturing technology tubing string that the utility model proposes at least has following advantages:
1) well cementation fracturing technology tubing string rigidity disclosed in the utility model little, under enter stratum convenience very, and packing effect is better.
2) only flowing hole is provided with at inner sliding sleeve top, thus when can guarantee to only have the pressure in well cementation fracturing technology tubing string to reach preset value, the liquid of described well cementation fracturing technology tubing string inside just can be made to enter above boss, then inner sliding sleeve is made to glide, thus the generation of premature setting situation can be avoided, improve the safety of well cementation fracturing technology tubing string.
3) ball seat of pitching sliding sleeve and the setting of setting ball, get large diameter combination as far as possible, thus can ensure cement the well time plug percent of pass.
4) rely on the acting in conjunction of seal and high viscosity grease, cementing concrete can not enter into the gap of inner sliding sleeve and housing, thus can not affect the slip of inner sliding sleeve in housing.
Above-mentioned explanation is only the general introduction of technical solutions of the utility model, in order to better understand technological means of the present utility model, and can be implemented according to the content of manual, coordinates accompanying drawing to be described in detail as follows below with preferred embodiment of the present utility model.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model well cementation fracturing technology tubing string;
Fig. 2 is the structural representation of the utility model well cementation fracturing technology tubing string;
Fig. 3 is the structural representation of the utility model well cementation fracturing technology tubing string.
Detailed description of the invention
For further setting forth the utility model for the technological means reaching predetermined utility model object and take and effect, below in conjunction with accompanying drawing and preferred embodiment, to according to the detailed description of the invention of a kind of fracturing technology tubing string of cementing the well that the utility model proposes, structure, feature and effect thereof, be described in detail as follows.In the following description, the not necessarily same embodiment that different " embodiment " or " embodiment " refers to.In addition, special characteristic, structure or feature in one or more embodiment can be combined by any suitable form.
Well cementation fracturing technology tubing string embodiment
One well cementation fracturing technology tubing string as shown in Figure 1, Figure 2 and Figure 3, comprise successively from bottom to top: float shoe 1, float collar 2, impacting seat 3, well cementation pressure reduction sliding sleeve 4 and well cementation pitching sliding sleeve, described float shoe 1, float collar 2, impacting seat 3, well cementation pressure reduction sliding sleeve 4 are connected through sleeve pipe 9 with well cementation pitching sliding sleeve; Described well cementation pressure reduction sliding sleeve 4 is provided with constant pressure valve 25.
According to oil reservoir situation and FRACTURING DESIGN, determine quantity and the position of described well cementation pressure reduction sliding sleeve 4 and described well cementation pitching sliding sleeve.According to tubing string table, successively above-mentioned parts are lowered into position.The rigidity of described well cementation fracturing technology tubing string is little, enters stratum convenience very under described well cementation fracturing technology tubing string.And described well cementation fracturing technology tubing string packing effect is better.
In the present embodiment, control opening of described well cementation pressure reduction sliding sleeve 4 by constant pressure valve 25.Thus the pressure can guaranteeing in described well cementation pressure reduction sliding sleeve 4 is when reaching preset value, described constant pressure valve 25 can be opened.Well cementation program is conveniently cemented the well.Inject cement paste, throw cementing plug and replace, when plug runs to impacting seat 3 position, carry out bruising.Then, cement Hou Ning is carried out.During pressure break, first open described well cementation pressure reduction sliding sleeve 4, due to described well cementation pressure reduction sliding sleeve 4 not having balance pipe, described well cementation pressure reduction sliding sleeve 4 open pressure be static pressure in tubing string and pump truck pressure and value.
The number of described well cementation pitching sliding sleeve is two or more.In the present embodiment, the number of described well cementation pitching sliding sleeve is four (being respectively the first pitching sliding sleeve 5, second pitching sliding sleeve 6, the 3rd pitching sliding sleeve 7 and the 4th pitching sliding sleeve 8).After described well cementation fracturing technology tubing string opens described well cementation pressure reduction sliding sleeve 4, in well cementation, pressure reduction sliding sleeve 4 place carries out first order pressure break, carries out pressure break according to the fracturing design program preset.Then, throw the ball of different-diameter, open each pitching sliding sleeve accordingly, carry out pressure break at different levels above.During concrete enforcement, the diameter of described first pitching sliding sleeve 5 is less than described second pitching sliding sleeve 6 diameter, and the diameter of described second pitching sliding sleeve 6 is less than described 3rd pitching sliding sleeve 7 diameter, and the diameter of described 3rd pitching sliding sleeve 7 is less than described 4th pitching sliding sleeve 8 diameter.The setting of the ball seat of pitching sliding sleeve and throwing motion setting ball used, gets larger-diameter combination as far as possible, thus the percent of pass of plug when can ensure to cement the well.
Preferably, described well cementation pressure reduction sliding sleeve 4 comprises housing and is arranged on the inner sliding sleeve 22 in described housing, and described inner sliding sleeve 22 slides axially in described housing; Described housing comprises upper shell 21 and lower house 24; At least one flowing hole is provided with at the top of described inner sliding sleeve 22; The sidewall of described inner sliding sleeve 22 is provided with constant pressure valve 25 and sliding sleeve boss 27, and described constant pressure valve 25 is arranged on the sidewall of the described inner sliding sleeve 22 below described upper shell 21, and described sliding sleeve boss 27 is arranged on below described low pressure valve; Between described upper shell 21 and described lower house 24, be provided with the first seal 11, between described sliding sleeve boss 27 and described lower house 24, be provided with the second seal 12.
Only flowing hole is provided with at described inner sliding sleeve 22 top, thus when can guarantee to only have the pressure in described well cementation fracturing technology tubing string to reach preset value, the liquid of described well cementation fracturing technology tubing string inside just can be made to enter above boss, then make described inner sliding sleeve 22 glide.Avoid the generation of premature setting situation.
Sidewall and the sliding sleeve boss 27 of described upper shell 21, lower house 24, inner sliding sleeve 22 form the first airtight cavity, and described constant pressure valve 25 is then arranged on the wall of described airtight cavity the sidewall of inner sliding sleeve 22 (i.e. on).Described sliding sleeve boss 27, inner sliding sleeve 22 sidewall and lower house 24 form the second airtight cavity.Wherein, inner sliding sleeve 22 has inner chamber, the static pressure pressure reduction sliding sleeve 4 of the present embodiment in the course of the work, first in the inner chamber of inner sliding sleeve 22, high-pressure fluid is pumped into from ground, described constant pressure valve 25 is opened under preset pressure condition, after described constant pressure valve 25 is opened, liquid passes through in the first airtight cavity described in elongated hole 17 by constant pressure valve 25, and be air in the second airtight cavity below described sliding sleeve boss 27, on identical area, the two ends up and down of sliding sleeve boss 27 produce pressure differential, thus described inner sliding sleeve 22 can be promoted move downward, thus realize opening described well cementation pressure reduction sliding sleeve 4, to realize linking up stratum, realize the object of pressure break.
By the setting of described constant pressure valve 25, described well cementation pressure reduction sliding sleeve 4 can be made just to open under setting pressure condition, thus described well cementation pressure reduction sliding sleeve 4 can not be opened in advance, improve the safety of described well cementation pressure reduction sliding sleeve 4.
Described well cementation pressure reduction sliding sleeve 4, not by the impact of cement in well cementation pressure break, normally can open use.Meanwhile, described well cementation pressure reduction sliding sleeve 4 also can be used in conventional bore hole fracturing technology.
Preferably, the number of described flowing hole is at least one.
Preferably, the pressure of opening of described constant pressure valve 25 is 5MPa.In the present embodiment, by suppressing in described inner sliding sleeve 22 from ground, when force value reaches 5MPa, described constant pressure valve 25 is opened, and liquid flows in described first airtight cavity, thus, promote described inner sliding sleeve 22 descending.
Preferably, described upper shell 21 and described lower house 24 are through being threaded.
Selectively, described upper shell 21 is fixedly connected with through static determinacy screw 23 with described lower house 24.
Selectively, after described upper shell 21 and described lower house 24 are threaded connection, then be fixedly connected with by described static determinacy screw 23, thus make the connected mode of described upper shell 21 and described lower house 24 firmer.
Preferably, in described flowing hole, be provided with full-bodied grease, play the effect of isolation cement.Consider that cementing concrete is on the impact caused described in described well cementation pressure reduction sliding sleeve 4 and described well cementation pitching sliding sleeve, described well cementation pressure reduction sliding sleeve 4 and crossing in chute of described pitching sliding sleeve all fill full-bodied grease, guarantee when well cementation replaces recirculated water mud, cement can not be made to flow in sliding sleeve part gap, affect the slip slided in described housing.
Preferably, described lower house 24 lower end is provided with positive stop lug boss 28, between described inner sliding sleeve 22 and described positive stop lug boss 28, be provided with spacing back-up ring 26.Described spacing back-up ring 26 moves to below internal diameter amplification place and can eject, and prevents from inner sliding sleeve 22 moves, and ensures the opening of circulation passage.Thus can realize linking up stratum, carry out the object of pressure break.
Preferably, described lower house 24 is provided with stopper slot, for coordinating with described spacing back-up ring 26.Spacing back-up ring 26 moves to stopper slot place and can eject, and prevents from described inner sliding sleeve 22 moves, and ensures the opening of circulation passage.
Preferably, between described inner sliding sleeve 22 and described positive stop lug boss 28, the 3rd seal 13 is also provided with.
Preferably, described 3rd seal 13 is arranged on above described spacing back-up ring 26.
Preferably, described upper shell 21 is provided with pressure break hole, is respectively equipped with the 4th seal 14 and the 5th seal 15 in the inner side of described upper shell 21, described 4th seal 14 and the 5th seal 15 are separately positioned on the both sides up and down in described pressure break hole.When reality uses, rely on the acting in conjunction of seal and high viscosity grease, cementing concrete can not enter into the gap between housing and inner sliding sleeve, after theing cement solidifies, described well cementation pressure reduction sliding sleeve 4 remains closed, thus can not affect the slip of inner sliding sleeve 22.
Concrete implementation process, first described constant pressure valve 25, described first seal 11, described second seal 12, described 3rd seal 13 are assembled, described 4th seal 14 is assembled to relevant position on described inner sliding sleeve 22 respectively to, described 5th seal 15, then, the sealing shroud being equipped with constant pressure valve 25 and seal is loaded in described upper shell 21, again described inner sliding sleeve 22 lower end is inserted in described lower house 24, and described lower house 24 is fixed with described upper shell 21 is connected.Thus, complete the overall assembling process of described well cementation pressure reduction sliding sleeve 4.
The above, it is only preferred embodiment of the present utility model, not any pro forma restriction is done to the utility model, the any simple modification done above embodiment according to technical spirit of the present utility model, equivalent variations and modification, all still belong in the scope of technical solutions of the utility model.
Claims (8)
1. a well cementation fracturing technology tubing string, it is characterized in that, described well cementation fracturing technology tubing string comprises from bottom to top successively:
Float shoe, float collar, impacting seat, well cementation pressure reduction sliding sleeve and well cementation pitching sliding sleeve, described float shoe, float collar, impacting seat, well cementation pressure reduction sliding sleeve are connected through sleeve pipe with well cementation pitching sliding sleeve;
Described well cementation pressure reduction sliding sleeve is provided with constant pressure valve.
2. well cementation fracturing technology tubing string according to claim 1, is characterized in that,
The number of described well cementation pitching sliding sleeve is two or more.
3. well cementation fracturing technology tubing string according to claim 1, is characterized in that,
Described well cementation pressure reduction sliding sleeve comprises housing and is arranged on the inner sliding sleeve in described housing, and described inner sliding sleeve slides axially in described housing;
Described housing comprises upper shell and lower house;
At least one flowing hole is provided with at the top of described inner sliding sleeve;
The sidewall of described inner sliding sleeve is provided with constant pressure valve and sliding sleeve boss, and described constant pressure valve is arranged on the sidewall of the described inner sliding sleeve below described upper shell, and described sliding sleeve boss is arranged on below described constant pressure valve;
Between described upper shell and described lower house, be provided with the first seal, between described sliding sleeve boss and described lower house, be provided with the second seal.
4. well cementation fracturing technology tubing string according to claim 3, is characterized in that,
Described upper shell and described lower house are through to be threaded and/or static determinacy screw is connected.
5. well cementation fracturing technology tubing string according to claim 3, is characterized in that,
Full-bodied grease is provided with in described flowing hole.
6. well cementation fracturing technology tubing string according to claim 3, is characterized in that,
Described lower house lower end is provided with positive stop lug boss, between described inner sliding sleeve and described positive stop lug boss, be provided with spacing back-up ring.
7. well cementation fracturing technology tubing string according to claim 6, is characterized in that,
The 3rd seal is also provided with between described inner sliding sleeve and described positive stop lug boss.
8. well cementation fracturing technology tubing string according to claim 3, is characterized in that,
Described upper shell is provided with pressure break hole, is respectively equipped with the 4th seal and the 5th seal in the inner side of described upper shell, described 4th seal and the 5th seal are separately positioned on the both sides up and down in described pressure break hole.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420503596.2U CN204492783U (en) | 2014-09-02 | 2014-09-02 | A kind of well cementation fracturing technology tubing string |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420503596.2U CN204492783U (en) | 2014-09-02 | 2014-09-02 | A kind of well cementation fracturing technology tubing string |
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| CN204492783U true CN204492783U (en) | 2015-07-22 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104179485A (en) * | 2014-09-02 | 2014-12-03 | 安东石油技术（集团）有限公司 | Cementation and fracture technique string and cementation and fracture technique process |
| CN108005628A (en) * | 2017-11-28 | 2018-05-08 | 中国石油集团渤海钻探工程有限公司 | Well cementation, pressure break, production integration tubing string and construction method |
| CN115247546A (en) * | 2021-04-28 | 2022-10-28 | 中石化石油工程技术服务有限公司 | Toe end well cementation fracturing sliding sleeve |
-
2014
- 2014-09-02 CN CN201420503596.2U patent/CN204492783U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104179485A (en) * | 2014-09-02 | 2014-12-03 | 安东石油技术（集团）有限公司 | Cementation and fracture technique string and cementation and fracture technique process |
| CN104179485B (en) * | 2014-09-02 | 2017-01-25 | 安东石油技术（集团）有限公司 | Cementation and fracture technique string |
| CN108005628A (en) * | 2017-11-28 | 2018-05-08 | 中国石油集团渤海钻探工程有限公司 | Well cementation, pressure break, production integration tubing string and construction method |
| CN115247546A (en) * | 2021-04-28 | 2022-10-28 | 中石化石油工程技术服务有限公司 | Toe end well cementation fracturing sliding sleeve |
| CN115247546B (en) * | 2021-04-28 | 2024-04-26 | 中石化石油工程技术服务有限公司 | Toe end well fracturing sliding sleeve |
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