CN204532233U - well cementing pipe column combination - Google Patents
well cementing pipe column combination Download PDFInfo
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- CN204532233U CN204532233U CN201520005447.8U CN201520005447U CN204532233U CN 204532233 U CN204532233 U CN 204532233U CN 201520005447 U CN201520005447 U CN 201520005447U CN 204532233 U CN204532233 U CN 204532233U
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Abstract
The utility model provides a kind of well cementing pipe column combination, and well cementing pipe column combination comprises float shoe, float collar, sleeve pipe closing well sliding sleeve, hydraulic expanding packer and Duo Gen sleeve pipe; Float shoe is placed on the lowermost end of well cementing pipe column combination; Float collar is placed on the upper end of float shoe, is connected between float collar with float shoe by sleeve pipe; Sleeve pipe closing well sliding sleeve is placed on the upper end of float collar, and sleeve pipe closing well sliding sleeve is connected by sleeve pipe with between float collar; Hydraulic expanding packer is positioned over the upper end of sleeve pipe closing well sliding sleeve, be connected by sleeve pipe with between sleeve pipe closing well sliding sleeve, hydraulic expanding packer is at least one group, often comprise two hydraulic expanding packers in group, one of them is positioned over the lower end of high pressure water layer, another is positioned over the upper end of high pressure water layer, is connected between hydraulic expanding packer by sleeve pipe; Sleeve pipe placed by the hydraulic expanding packer being positioned over the upper end of high pressure water layer, and sleeve pipe is connected to well head.
Description
Technical field
The utility model relates to reinforcing oil well technology, particularly relates to a kind of well cementing pipe column combination improving cementing quality.
Background technology
There is individual well longitudinally upper feature of growing multilayer in China's most of oil gas field, and along with the expansion again of exploration knowledge, and find that new oil-gas Layer gets more and more developing oil reservoir bottom, such as " looking for Tahe under Tahe " has become geology common recognition.But because China's major part oil field adopts water filling body to develop for mode, long-term injecting water causes part oil reservoir target zone high pressure to be rich in water.
Need well cementation when developing understratum, well cementation be by pipeline outside cylindrical shaft wall and well help between annular space inject the slurries as a form of gel that proportion is greater than mud, mud is cemented out from bottom to up the operation of also consolidation cylindrical shaft wall.Well cementing process is mainly divided into three steps: 1, setting of casing; 2, cementing; 3, well head is installed and casing pressure test.But when developing understratum and need well cementation completion, because top Advance Water Injection straticulate exploration in early stage pressure is higher, the strata pressure that cement slurry property can not balance Advance Water Injection stratum causes water to immerse in cement paste.Cement slurry property generation marked change, causes cementing quality poor, and later stage pressure break packing is poor, affects aerogenesis effect.
At present, domestic and international project technician mainly through regulating the density of upper water mud, thus realizes nearly equilibrium strata pressure, and then realizes pushing down strata pressure, avoids water outlet to improve cementing quality.But this mode has the following disadvantages: first, if upper formation exists lost-circulation zone, then cement slurry density can not infinitely expand, and cannot complete the requirement of equilibrium strata pressure; Secondly, even if produce the nearly equilibrium pressure with stratum, also keep away unavoidable formation fluid and penetrate in cement paste, thus cause cement slurry property to be deteriorated, affect cementing quality.
Utility model content
The utility model provides a kind of well cementing pipe column combination, can effective packing high pressure water layer, improves cementing quality.
The utility model provides a kind of well cementing pipe column combination, comprising: float shoe, float collar, sleeve pipe closing well sliding sleeve, hydraulic expanding packer and Duo Gen sleeve pipe;
Float shoe is placed on the lowermost end of well cementing pipe column combination;
Float collar is placed on the upper end of float shoe, is connected between float collar with float shoe by sleeve pipe;
Sleeve pipe closing well sliding sleeve is placed on the upper end of float collar, and sleeve pipe closing well sliding sleeve is connected by sleeve pipe with between float collar;
Sleeve pipe closing well sliding sleeve comprises plug, and the diameter of plug is less than the internal diameter of sleeve pipe closing well sliding sleeve and hydraulic expanding packer, for the liquid that replaces in well cementing pipe column combination and move to sleeve pipe closing well sliding sleeve place and close sleeve pipe closing well sliding sleeve;
Hydraulic expanding packer is positioned over the upper end of sleeve pipe closing well sliding sleeve, be connected by sleeve pipe with between sleeve pipe closing well sliding sleeve, hydraulic expanding packer is at least one group, often comprise two hydraulic expanding packers in group, one of them is positioned over the lower end of high pressure water layer, another is positioned over the upper end of high pressure water layer, is connected between hydraulic expanding packer by sleeve pipe;
Sleeve pipe placed by the hydraulic expanding packer being positioned over the upper end of high pressure water layer, and one end of sleeve pipe is connected with the hydraulic expanding packer of the upper end being positioned over high pressure water layer, and the other end of sleeve pipe is connected to well head.
In an embodiment of the present utility model, aforementioned plug one end is placed with bruising head.
In an embodiment of the present utility model, aforementioned sleeve pipe closing well sliding sleeve also comprises: sliding sleeve inner casing, sliding sleeve shell, pin, sliding sleeve body;
The thickness of sliding sleeve body is greater than the thickness of arbitrary sleeve pipe;
Sliding sleeve shell is positioned in sliding sleeve body, and sliding sleeve shell is connected with sliding sleeve body, is placed with circulation canal in sliding sleeve shell, sliding sleeve side wall of outer shell is placed with circulation port, circulation port is connected with circulation canal, and sliding sleeve shell is placed with joint ring, for sliding sleeve shell and sliding sleeve inner casing being tightly connected;
Pin is positioned between sliding sleeve shell and sliding sleeve inner casing, for connecting sliding sleeve inner casing and sliding sleeve shell, makes sliding sleeve inner casing higher than circulation port.
In an embodiment of the present utility model, aforementioned circulation port is 2.
In an embodiment of the present utility model, the diameter of aforementioned many sleeve pipes is identical.
In an embodiment of the present utility model, the thickness of aforementioned sliding sleeve body is at least 2 times of casing thickness.
In an embodiment of the present utility model, aforementioned sliding sleeve body is placed with screw thread near one end of well cementing pipe column combination bottom, adopts and be threaded between sliding sleeve body with sliding sleeve shell.
In an embodiment of the present utility model, between aforementioned float collar and float shoe, centralizer placed by sleeve pipe, for righting float shoe and float collar, make float shoe and float collar guide well cementing pipe column combination to be positioned in the middle of pit shaft.
In an embodiment of the present utility model, aforementioned centralizer is spring centralizer.
The utility model beneficial effect is compared with prior art: the well cementing pipe column combination that the utility model provides, can packing high pressure water layer, avoid the water permeation of high pressure water layer to enter in cement paste, after guaranteeing well cementation completion, cement slurry property does not change, thus improves cementing quality.
Accompanying drawing explanation
The well cementing pipe column combination structural representation that Fig. 1 provides for the utility model one embodiment;
The well cementing pipe column combination structural representation of the hydraulic expanding packer setting that Fig. 2 provides for the utility model one embodiment;
The well cementing pipe column combination structural representation that Fig. 3 provides for another embodiment of the utility model;
The sleeve pipe closing well sliding sleeve closing well process schematic that Fig. 4 A, Fig. 4 B provide for the utility model;
The structural representation of the sleeve pipe closing well sliding sleeve that Fig. 5 provides for the utility model;
The structural representation of the sleeve pipe closing well sliding sleeve closing well that Fig. 6 provides for the utility model;
The well cementing pipe column combination structural representation of the hydraulic expanding packer setting that Fig. 7 provides for another embodiment of the utility model;
The cementing method flow chart that Fig. 8 provides for the utility model one embodiment.
Description of reference numerals:
1-float shoe; 2-centralizer; 3-float collar;
4-sleeve pipe closing well sliding sleeve; 5-sleeve pipe; 6-hydraulic expanding packer;
7-plug; 8-sliding sleeve inner casing; 9-sliding sleeve shell;
10-pin; 11-circulation port; 12-sliding sleeve body;
71-bruising head.
Detailed description of the invention
For making the object of the utility model embodiment, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
The well cementing pipe column combination structural representation that Fig. 1 provides for the utility model one embodiment, the well cementing pipe column combination structural representation of the hydraulic expanding packer setting that Fig. 2 provides for the utility model one embodiment.As depicted in figs. 1 and 2, the utility model provides a kind of well cementing pipe column combination, comprising: float shoe 1, float collar 3, sleeve pipe closing well sliding sleeve 4, hydraulic expanding packer 6 and Duo Gen sleeve pipe 5.
Float shoe 1 is placed on the lowermost end of well cementing pipe column combination; Float collar 3 is placed on the upper end of float shoe 1, is connected between float collar 3 with float shoe 1 by sleeve pipe.
Concrete, float collar 3 and float shoe 1 match placement, can guide well cementing pipe column combination along pit shaft smoothly down to shaft bottom.Adopt sleeve pipe to connect between float collar 3 and float shoe 1, the block staying a segment distance to be conducive to liquid between float shoe 1 and float collar 3 passes through.The diameter of many sleeve pipes 5 is identical, and the present embodiment does not limit the number of sleeve pipe and length, and concrete number and length can be determined according to the actual conditions of drilling well.It should be noted that, the structure of the concrete structure of the float shoe 1 that the present embodiment provides and float collar 3 and general principle and prior art float shoe and float collar is identical with in general principle, does not repeat them here.
Optionally, between float collar 3 and float shoe 1, sleeve pipe is placed with centralizer 2, centralizer 2, for righting float shoe 1 and float collar 3, makes float shoe 1 and float collar 3 guide well cementing pipe column combination to be positioned in the middle of pit shaft.Concrete, centralizer 2 is spring centralizer.
Sleeve pipe closing well sliding sleeve 4 is placed on the upper end of float collar 3, and sleeve pipe closing well sliding sleeve 4 is connected by sleeve pipe with between float collar 3.
Sleeve pipe closing well sliding sleeve 4 comprises plug 7, and the diameter of plug 7 is less than the internal diameter of sleeve pipe closing well sliding sleeve 4 and hydraulic expanding packer 6, for the liquid that replaces in well cementing pipe column combination and move to sleeve pipe closing well sliding sleeve 4 place and close sleeve pipe closing well sliding sleeve 4.
Concrete, cement paste is injected after in well cementing pipe column combination, plug 7 is put in well cementing pipe column combination from well head, cement paste in well cementing pipe column combination is expressed to outside well cementing pipe column combination by plug 7, cement paste flows in the space of well cementing pipe column combination and the borehole wall, and plug 7 replaces the cement paste in well cementing pipe column combination and moves to sleeve pipe closing well sliding sleeve 4 place closes sleeve pipe closing well sliding sleeve 4.The diameter of plug 7 is less than the internal diameter of sleeve pipe closing well sliding sleeve 4 and hydraulic expanding packer 6, guarantees that plug 7 can move to sleeve pipe closing well sliding sleeve 4 place.It should be noted that, the liquid in the present embodiment in pipe string combination is not limited in cement paste, also can be insulating liquid.
Hydraulic expanding packer 6 is positioned over the upper end of sleeve pipe closing well sliding sleeve 4, be connected by sleeve pipe with between sleeve pipe closing well sliding sleeve 4, hydraulic expanding packer 6 is at least one group, often comprise two hydraulic expanding packers 6 in group, one of them is positioned over the lower end of high pressure water layer, another is positioned over the upper end of high pressure water layer, is connected between hydraulic expanding packer 6 by sleeve pipe.
Concrete, hydraulic expanding packer 6 is at least one group, often comprise two hydraulic expanding packers 6 in group, one of them is positioned over the lower end of high pressure water layer, another is positioned over the upper end of high pressure water layer, when ensure that hydraulic expanding packer 6 sets, be positioned over the borehole wall of hydraulic expanding packer 6 dilator to water under high pressure layer lower end of high pressure water layer lower end, be positioned over the borehole wall of hydraulic expanding packer 6 dilator to water under high pressure layer upper end of high pressure water layer upper end, make to seal between high pressure water layer upper end and high pressure water layer lower end, and then reach packing high pressure water layer.Can by regulating sleeve pipe between hydraulic expanding packer 6 and between hydraulic expanding packer 6 and sleeve pipe closing well sliding sleeve 4, the number of sleeve pipe and length to be guaranteed in every group two hydraulic expanding packers 6 one of them is positioned over the lower end of high pressure water layer, another is positioned over the upper end of high pressure water layer.It should be noted that, in the present embodiment, the concrete structure of hydraulic expanding packer 6 is with to realize principle identical with hydraulic expanding packer in prior art, does not repeat them here.
Sleeve pipe placed by the hydraulic expanding packer 6 being positioned over the upper end of high pressure water layer, and one end of sleeve pipe is connected with the hydraulic expanding packer 6 of the upper end being positioned over high pressure water layer, and the other end of sleeve pipe is connected to well head.
It should be noted that, float shoe 1 in the well cementing pipe column combination that the present embodiment provides, float collar 3, sleeve pipe closing well sliding sleeve 4, some sleeve pipes 5, hydraulic expanding packer 6 are all independently, when concrete use, only need require to connect float shoe 1, float collar 3, sleeve pipe closing well sliding sleeve 4, some sleeve pipes 5, hydraulic expanding packer 6 according to well cementing pipe column combination.
The well cementing pipe column combination that the present embodiment provides is in concrete use procedure, and float shoe 1 and float collar 3 guide well cementing pipe column combination down to shaft bottom assigned address; Cement injection in well cementing pipe column combination, drops into plug 7 in well cementing pipe column combination from well head, starts to replace construction, cement paste is cemented out from bottom to up from well cementing pipe column combination; Plug 7 replaces and moves to sleeve pipe closing well sliding sleeve 4 place, closes sleeve pipe closing well sliding sleeve 4; Sleeve pipe closing well sliding sleeve 4 lower end sleeve closure builds the pressure, hydraulic expanding packer 6 pressure-bearing, set hydraulic expanding packer 6, be positioned over the borehole wall of hydraulic expanding packer 6 dilator to water under high pressure layer lower end of high pressure water layer lower end, be positioned over the borehole wall of hydraulic expanding packer 6 dilator to water under high pressure layer upper end of high pressure water layer upper end, make to seal between high pressure water layer upper end and high pressure water layer lower end, packing high pressure water layer.
The well cementing pipe column combination that the present embodiment provides, guide well cementing pipe column combination down to shaft bottom assigned address by float shoe 1 and float collar 3, when replacing construction, plug 7 replaces and moves to sleeve pipe closing well sliding sleeve 4 place closedown sleeve pipe closing well sliding sleeve 4, sleeve pipe closing well sliding sleeve 4 lower end sleeve closure builds the pressure, and hydraulic expanding packer 6 pressure-bearing, sets hydraulic expanding packer 6, packing high pressure water layer, improves cementing quality.
The well cementing pipe column combination structural representation that Fig. 3 provides for another embodiment of the utility model, the sleeve pipe closing well sliding sleeve closing well process schematic that Fig. 4 A, Fig. 4 B provide for the utility model, the structural representation of the sleeve pipe closing well sliding sleeve that Fig. 5 provides for the utility model, the structural representation of the sleeve pipe closing well sliding sleeve closing well that Fig. 6 provides for the utility model, the well cementing pipe column combination structural representation of the hydraulic expanding packer setting that Fig. 7 provides for another embodiment of the utility model.As shown in Fig. 3, Fig. 4 A, Fig. 4 B, Fig. 5-7, the well cementing pipe column combination sleeve pipe closing well sliding sleeve 4 that the utility model provides also comprises: sliding sleeve inner casing 8, sliding sleeve shell 9, pin 10, sliding sleeve body 12.
The thickness of sliding sleeve body 12 is greater than the thickness of arbitrary sleeve pipe; Sliding sleeve shell 9 is positioned in sliding sleeve body 12, sliding sleeve shell 9 is connected with sliding sleeve body 12, circulation canal is placed with in sliding sleeve shell 9, sliding sleeve shell 9 sidewall is placed with circulation port 11, circulation port 11 is connected with circulation canal, sliding sleeve shell 9 is placed with joint ring, for sliding sleeve shell 9 and sliding sleeve inner casing 8 being tightly connected; Pin 10 is positioned between sliding sleeve shell 9 and sliding sleeve inner casing 8, for connecting sliding sleeve inner casing 8 and sliding sleeve shell 9, makes sliding sleeve inner casing 8 higher than circulation port 11.
Optionally, plug 7 one end is placed with bruising 71; Circulation port 11 is 2, and the thickness of sliding sleeve body 12 is at least 2 times of casing thickness; Sliding sleeve body 12 is placed with screw thread near one end of well cementing pipe column combination bottom, adopts and be threaded between sliding sleeve body 12 with sliding sleeve shell 9.
Concrete, the thickness of sliding sleeve body 12 is greater than the thickness of arbitrary sleeve pipe, guarantees that sliding sleeve body 12 has enough bearing capacities.Plug 7 one end is placed with bruising 71, when making plug 7 run to sleeve pipe closing well sliding sleeve 4 place, the bruising of plug 7 front end 71 realizes bruising with sliding sleeve inner casing 8 is supporting, cut off the pin 10 connecting sliding sleeve inner casing 8 and sliding sleeve shell 9, sliding sleeve inner casing 8 comes downwards to circulation canal, circulation port 11 on blocking circulation canal, closes sleeve pipe closing well sliding sleeve 4.
The well cementing pipe column combination that the present embodiment provides is in concrete use procedure, and float shoe 1 and float collar 3 guide well cementing pipe column combination down to shaft bottom assigned address; Cement injection in well cementing pipe column combination, drops into plug 7 in well cementing pipe column combination from well head, starts to replace construction, cement paste is cemented out from bottom to up from well cementing pipe column combination; Plug 7 replaces and moves to sleeve pipe closing well sliding sleeve 4 place, the bruising of plug 7 front end 71 realizes bruising with sliding sleeve inner casing 8 is supporting, and cut off the pin 10 connecting sliding sleeve inner casing 8 and sliding sleeve shell 9, sliding sleeve inner casing 8 comes downwards to circulation canal, circulation port 11 on blocking circulation canal, closes sleeve pipe closing well sliding sleeve 4; Sleeve pipe closing well sliding sleeve 4 lower end sleeve closure builds the pressure, hydraulic expanding packer 6 pressure-bearing, set hydraulic expanding packer 6, be positioned over the borehole wall of hydraulic expanding packer 6 dilator to water under high pressure layer lower end of high pressure water layer lower end, be positioned over the borehole wall of hydraulic expanding packer 6 dilator to water under high pressure layer upper end of high pressure water layer upper end, make to seal between high pressure water layer upper end and high pressure water layer lower end, packing high pressure water layer.
The well cementing pipe column combination that the present embodiment provides, on the basis of above-described embodiment, sliding sleeve inner casing 8 is comprised by placing sleeve pipe closing well sliding sleeve, sliding sleeve shell 9, pin 10, sliding sleeve body 12, and plug 7 one end is placed with bruising 71, when making to replace operation, plug 7 replaces and moves to sleeve pipe closing well sliding sleeve 4 place, the bruising of plug 7 front end 71 realizes bruising with sliding sleeve inner casing 8 is supporting, cut off the pin 10 connecting sliding sleeve inner casing 8 and sliding sleeve shell 9, sliding sleeve inner casing 8 comes downwards to circulation canal, circulation port 11 on blocking circulation canal, close sleeve pipe closing well sliding sleeve 4, sleeve pipe closing well sliding sleeve 4 lower end sleeve closure builds the pressure, hydraulic expanding packer 6 pressure-bearing, set hydraulic expanding packer 6, can effective packing high pressure water layer, improve cementing quality.
The cementing method flow chart that Fig. 8 provides for the utility model one embodiment, as shown in Figure 8, the cementing method that the utility model provides, adopts the well cementing pipe column combination as above-mentioned any embodiment to cement the well, comprising:
S801: by well cementing pipe column combination down to shaft bottom;
Concrete, float shoe 1 and the supporting placement of float collar 3 in well cementing pipe column combination, guide well cementing pipe column combination along pit shaft smoothly down to shaft bottom assigned address.
Optionally, well cementing pipe column combination is specifically comprised down to shaft bottom: by pit shaft placed in the middle for well cementing pipe column combination.
Concrete, the centralizer 2 between float shoe 3 and float collar 1, sleeve pipe placed, for righting float shoe 1 and float collar 3, makes float shoe 1 and float collar 3 guide well cementing pipe column combination to be positioned in the middle of pit shaft.
S802: cement injection in well cementing pipe column combination;
Concrete, the cement pump truck on well head is to cement injection in well cementing pipe column combination.It should be noted that, the cement pump truck in the present embodiment is identical in detailed process and the prior art of cement injection in well cementing pipe column combination, does not repeat them here.
Optionally, also comprised before cement injection in well cementing pipe column combination: in well cementing pipe column combination, note insulating liquid.To guarantee in well cementing pipe column combination the clean of well cementing pipe group combination before cement injection, can more effective cement injection and replace cement paste.
S803: put in well cementing pipe column combination from well head by plug 7, starts to replace construction, cement paste is cemented out from bottom to up from well cementing pipe column combination;
S804: plug 7 replaces and moves to sleeve pipe closing well sliding sleeve 4 place, closes sleeve pipe closing well sliding sleeve 4;
Concrete, close sleeve pipe closing well sliding sleeve 4 specifically to comprise: plug 7 replaces and moves to sleeve pipe closing well sliding sleeve 4 place, the bruising of plug 7 front end 71 and sliding sleeve inner casing 8 bruising, cut off the pin 10 connecting sliding sleeve inner casing 8 and sliding sleeve shell 9, sliding sleeve inner casing 8 comes downwards to circulation canal, circulation port 11 on blocking circulation canal, closes sleeve pipe closing well sliding sleeve 4.
S805: sleeve pipe closing well sliding sleeve 4 lower end sleeve closure builds the pressure, hydraulic pressure is added from well cementing pipe column combination, hydraulic expanding packer 6 pressure-bearing, well cementing pipe column combination produces pressure reduction up and down, set hydraulic expanding packer 6, hydraulic expanding packer 6 expanse is to the borehole wall, hydraulic expanding packer 6 expansion that hydraulic expanding packer 6 is often positioned over high pressure water layer lower end in group touch the borehole wall of water under high pressure layer lower end, hydraulic expanding packer 6 expansion being positioned over high pressure water layer upper end touch the borehole wall of water under high pressure layer upper end, make to seal between high pressure water layer upper end and high pressure water layer lower end, packing high pressure water layer, Hou Ning.
The cementing method that the present embodiment provides, the well cementing pipe column combination as above-mentioned any embodiment is adopted to cement the well, guide well cementing pipe column combination down to shaft bottom assigned address by float shoe 1 and float collar 3, when replacing construction, plug 7 replaces and moves to sleeve pipe closing well sliding sleeve 4 place closedown sleeve pipe closing well sliding sleeve 4, and sleeve pipe closing well sliding sleeve 4 lower end sleeve closure builds the pressure, hydraulic expanding packer 6 pressure-bearing, set hydraulic expanding packer 6, packing high pressure water layer, improve cementing quality.
Last it is noted that above each embodiment is only in order to illustrate the technical solution of the utility model, be not intended to limit; Although be described in detail the utility model with reference to foregoing embodiments, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of each embodiment technical scheme of the utility model.
Claims (9)
1. a well cementing pipe column combination, is characterized in that, comprising: float shoe, float collar, sleeve pipe closing well sliding sleeve, hydraulic expanding packer and Duo Gen sleeve pipe;
Described float shoe is placed on the lowermost end of described well cementing pipe column combination;
Described float collar is placed on the upper end of described float shoe, is connected between described float collar with described float shoe by sleeve pipe;
Described sleeve pipe closing well sliding sleeve is placed on the upper end of described float collar, and described sleeve pipe closing well sliding sleeve is connected by sleeve pipe with between described float collar;
Described sleeve pipe closing well sliding sleeve comprises plug, the diameter of described plug is less than the internal diameter of described sleeve pipe closing well sliding sleeve and described hydraulic expanding packer, for the liquid that replaces in described well cementing pipe column combination and move to described sleeve pipe closing well sliding sleeve place and close described sleeve pipe closing well sliding sleeve;
Described hydraulic expanding packer is positioned over the upper end of described sleeve pipe closing well sliding sleeve, be connected by sleeve pipe with between described sleeve pipe closing well sliding sleeve, described hydraulic expanding packer is at least one group, often comprise two described hydraulic expanding packers in group, one of them is positioned over the lower end of high pressure water layer, another is positioned over the upper end of high pressure water layer, is connected between described hydraulic expanding packer by sleeve pipe;
Sleeve pipe placed by the described hydraulic expanding packer being positioned over the upper end of high pressure water layer, and one end of described sleeve pipe is connected with the described hydraulic expanding packer being positioned over the upper end of high pressure water layer, and the other end of described sleeve pipe is connected to well head.
2. well cementing pipe column combination according to claim 1, is characterized in that, described plug one end is placed with bruising head.
3. well cementing pipe column combination according to claim 2, is characterized in that, described sleeve pipe closing well sliding sleeve also comprises: sliding sleeve inner casing, sliding sleeve shell, pin, sliding sleeve body;
The thickness of described sliding sleeve body is greater than the thickness of arbitrary described sleeve pipe;
Described sliding sleeve shell is positioned in described sliding sleeve body, described sliding sleeve shell is connected with described sliding sleeve body, circulation canal is placed with in described sliding sleeve shell, described sliding sleeve side wall of outer shell is placed with circulation port, described circulation port is connected with described circulation canal, described sliding sleeve shell is placed with joint ring, for described sliding sleeve shell and described sliding sleeve inner casing being tightly connected;
Described pin is positioned between described sliding sleeve shell and described sliding sleeve inner casing, for connecting described sliding sleeve inner casing and described sliding sleeve shell, makes described sliding sleeve inner casing higher than described circulation port.
4. well cementing pipe column combination according to claim 3, is characterized in that, described circulation port is 2.
5. well cementing pipe column combination according to claim 4, is characterized in that, the diameter of described many sleeve pipes is identical.
6. well cementing pipe column combination according to claim 5, is characterized in that, the thickness of described sliding sleeve body is at least 2 times of casing thickness.
7. well cementing pipe column combination according to claim 6, is characterized in that, described sliding sleeve body is placed with screw thread near one end of described well cementing pipe column combination bottom, adopts and be threaded between described sliding sleeve body with described sliding sleeve shell.
8. well cementing pipe column combination according to claim 1, it is characterized in that, between described float collar and described float shoe, centralizer placed by sleeve pipe, for float shoe described in righting and described float collar, make described float shoe and described float collar guide described well cementing pipe column combination to be positioned in the middle of pit shaft.
9. well cementing pipe column combination according to claim 8, is characterized in that, described centralizer is spring centralizer.
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| CN201520005447.8U CN204532233U (en) | 2015-01-04 | 2015-01-04 | well cementing pipe column combination |
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| CN201520005447.8U CN204532233U (en) | 2015-01-04 | 2015-01-04 | well cementing pipe column combination |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105822252A (en) * | 2015-01-04 | 2016-08-03 | 中国石油天然气股份有限公司 | Well cementation pipe column combination and well cementation method |
| CN112031701A (en) * | 2020-08-07 | 2020-12-04 | 黄越 | Cement bearing device and oil-gas well cement plug operation construction method |
| CN114961636A (en) * | 2022-06-21 | 2022-08-30 | 中煤科工集团重庆研究院有限公司 | Fixed-point grouting and sealing method for complex structural stratum of underground coal mine |
-
2015
- 2015-01-04 CN CN201520005447.8U patent/CN204532233U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105822252A (en) * | 2015-01-04 | 2016-08-03 | 中国石油天然气股份有限公司 | Well cementation pipe column combination and well cementation method |
| CN105822252B (en) * | 2015-01-04 | 2018-09-04 | 中国石油天然气股份有限公司 | Pipe string combination of cementing the well and cementing method |
| CN112031701A (en) * | 2020-08-07 | 2020-12-04 | 黄越 | Cement bearing device and oil-gas well cement plug operation construction method |
| CN114961636A (en) * | 2022-06-21 | 2022-08-30 | 中煤科工集团重庆研究院有限公司 | Fixed-point grouting and sealing method for complex structural stratum of underground coal mine |
| CN114961636B (en) * | 2022-06-21 | 2023-09-01 | 中煤科工集团重庆研究院有限公司 | Fixed-point grouting sealing method for underground complex-structure stratum of coal mine |
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