CN208347740U - A kind of stage cementing device with packing function - Google Patents
A kind of stage cementing device with packing function Download PDFInfo
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- CN208347740U CN208347740U CN201821019060.8U CN201821019060U CN208347740U CN 208347740 U CN208347740 U CN 208347740U CN 201821019060 U CN201821019060 U CN 201821019060U CN 208347740 U CN208347740 U CN 208347740U
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Abstract
The utility model discloses a kind of stage cementing devices with packing function, comprising: cementing device is arranged between casing, including sequentially connected top connection (1), ontology (6) and base tube (10)；Packer, it is set in outside cementing device, including packing element (11), packing element (11) is set in the outside of base tube (10), and between the outside wall surface of base tube (10) formed can filling liquid expansion seal cavity (26), liquid is filled into seal cavity to realize packing annular space by being connected in the reservoir channel (23) and cementing device in base tube (10), by suppressing unlatching reservoir channel into cementing device in the top of seal cavity (26).The a kind of of the utility model is suitable for fraclional well cementing with the stage cementing device for insulating function, by Hydraulic Expansion sealed packer after level-one well cementation, realizes the partition packing of stage cementing device or more annular space.
Description
Technical field
The utility model relates to a kind of underground well cementation hook-up for cementing more particularly to a kind of packing formula stage cementings
Device.
Background technique
After oil/gas well finishing drilling, tripping in casing is needed, well cementing operation is carried out, can solve depth using two-stage cementing technology
Some technical problems in well, ultradeep well cementing operation, a such as cementing amount is big, and the construction time is long, and formation fracture pressure is low,
Cement returns the problems such as less than design well depth, and the classification injector with annular space packing function can be realized and cement the well in level-one
Bi Hou, annular space naked eye, blocking head of liquid transmitting can directly reduce shaft bottom to the pressure on stratum to packing stage cementing device up and down
Power protects stratum and wellbore, and can carry out second level cementing operation without waiting for level-one cement slurry sets, shortens operation
Time reduces well cementation cost.
The existing method that annular space is insulated during fraclional well cementing that can be realized is broadly divided into two kinds of forms: the first, it uses
Conventional hierarchical cementing device is used in series with packer, and packer is placed in below stage cementing device on pipe string structure,
Its disadvantage needs respectively operate two tools, complicated for operation, and structure is not compact and service condition is limited；Second,
Stage cementing device and packer are designed as integral type, by using ancillary attachment triggering packer effect, certain structures packing
Device has that swollen envelope, security reliability are poor in advance.
Utility model content
The purpose of this utility model is to provide one kind can be suitable for fraclional well cementing, and can be realized in cementing operations
The stage cementing device of annular space wellbore packing.
To achieve the above object, the particular technique side of a kind of stage cementing device with packing function of the utility model
Case are as follows:
A kind of stage cementing device with packing function, comprising: cementing device is arranged between casing, including sequentially
Top connection, ontology and the base tube of connection；Packer is set in outside cementing device, including packing element, and packing element is set in the outer of base tube
Portion, and formed between the outside wall surface of base tube can filling liquid expansion seal cavity, the top of seal cavity passes through the note in base tube
It is connected in liquid channel and cementing device, fills liquid into seal cavity by suppressing unlatching reservoir channel into cementing device
Annular space is insulated to realize.
A kind of stage cementing device with packing function of the utility model is:
1) simple and reasonable, easily operated, high reliablity；
2) it is suitable for fraclional well cementing, by Hydraulic Expansion sealed packer after level-one well cementation, realizes stage cementing device
The partition packing of upper and lower annular space；
3) annular space head of liquid of being honored as a queen since packer is swollen is separated by packer, reduces fluid column to the shadow of strata pressure
It rings, formation leakage influences cementing quality when effective protection stratum and wellbore or avoidable level-one are cemented the well, and without waiting for level-one
Cement slurry sets can carry out second level cementing operation, effectively shorten the activity duration；
4) attachment and attachment needed for are subsequent to be bored except operation is consistent with conventional hierarchical cementing device, and tool adaptability is improved,
Additional particular/special requirement is not generated.
Detailed description of the invention
Fig. 1 is the structure chart in original state of the stage cementing device of the utility model；
Fig. 2 is that the stage cementing device of the utility model is opening the structural schematic diagram filled in and reached when opening obturating plug position；
Fig. 3 is that the stage cementing device of the utility model shows in the reservoir channel structure in the open state of packer
It is intended to；
Fig. 4 is structural schematic diagram of the stage cementing device of the utility model in circulation port in the open state；
Fig. 5 is structural schematic diagram of the stage cementing device of the utility model when circulation port is in close state；
Fig. 6 is the structural schematic diagram of the opening plug in the utility model；
Fig. 7 is the structural schematic diagram of the shut-off plug in the utility model.
In figure: 1. top connections；2. closing obturating plug；3. the first shear pin；4. block；5. closing set；6. ontology；7. opening plug
Seat；8. the second shear pin；9. baffle ring；10. base tube；11. packing element；12. opening plug；13. shut-off plug；21. closing set circulation port；22.
Bulk circulation hole；23. reservoir channel；24. check valve；25. closing valve；26. cavity.
Specific embodiment
In order to be better understood by the purpose of this utility model, structure and function, with reference to the accompanying drawing, to the utility model
It is a kind of to do further detailed description with the stage cementing device for insulating function.
As shown in Figures 1 to 7, it is shown as a kind of stage cementing device with packing function of the utility model, including
Cementing device and the packer being set in outside cementing device, cementing device are arranged between casing, including it is sequentially connected on connect
First 1, ontology 6 and base tube 10, packer are set in the outside of base tube 10, and for insulating annular space, packer includes packing element 11, packing element
Formed between 11 and the outside wall surface of base tube 10 can filling liquid expansion seal cavity 26, the top of seal cavity 26 passes through base tube 10
It is connected in reservoir channel 23 and cementing device.Wherein, the both ends of top connection 1 are threadedly coupled with casing and ontology 6 respectively, ontology
6 both ends are internal screw thread, are threadedly coupled respectively with the base tube 10 of the top connection 1 on top and lower part by internal screw thread, base tube 10
Bottom be connected by external screw thread with casing.
Further, it is provided with check valve 24 on reservoir channel 23 and pressure activated closes valve 25, the setting of check valve 24 is being pressed
The upstream of valve 25 is closed in power triggering.That is, pressure activated closes valve 25 than check valve 24 closer to seal cavity 26.When close
Envelope cavity 26, which has filled and reached, closes the triggering pressure of valve 25, and pressure activated closes valve 25 and closes reservoir channel 23, to cut
Liquid flowing in disconnected cementing device.
Further, the internal sleeve of ontology 6, which is equipped with, closes set 5, closes on the side wall of set 5 and is provided with closing set circulation port 21,
It is provided with bulk circulation hole 22 on the side wall of ontology 6, bulk circulation hole 22 is driven by ontology 6 and the relative movement for closing set 5
21 relative motion of circulation port is covered with closing to realize aperture and closed pore.When the phase parallel with set circulation port 21 is closed of bulk circulation hole 22
When logical, the cavity realization inside and outside cementing device is connected, inner-outer circulation then can be carried out.When bulk circulation hole 22 and close
When set circulation port 21 is staggered and is not communicated with, the bulk circulation hole 22 on ontology 6 is closed, completes well cementing operation.
Further, the bottom for closing set 5, which is provided with, opens obturating plug 7, and opening obturating plug 7 is consolidated by the first shear pin 8 with set 5 is closed
Fixed connection, closes the mounting hole being provided on the side wall of set 5 for install the first shear pin 8, reservoir channel 23 by mounting hole and
Cementing device inner chamber body is connected.Therefore when opening 12 free-fallings of plug put into cementing device to the opening plug for closing set 5
After at seat 7, to suppressing in casing, then the first shear pin 8 closed on set 5 can be cut by opening the effect of being under pressure of obturating plug 7, be beaten
It opens to fill in 12 and open obturating plug 7 and continues to move down the first shear pin 8 of drive and leave to close to cover 5, then leak out closing set upper first and cut
8 mounting hole is followed closely, the liquid in cementing device enters close between the base tube 10 and packing element 11 of packer by reservoir channel 23
It seals in cavity 26, the seal cavity 26 by injecting liquid gradually expands, and packing element 11 starts swollen envelope, is expanded by packing element and realizes envelope
The purpose of spacer ring sky.
Further, the top for closing set 5, which is provided with, closes obturating plug 2, and closing obturating plug 2 is consolidated by the second shear pin 3 with set 5 is closed
Fixed connection, closes the mounting hole being provided on the side wall of obturating plug 2 for installing the second shear pin 3.
Further, it closes on set 5, closing obturating plug 2, opening obturating plug 7 and base tube 10 and is provided with sealing ring, to realize water filling
Various seal requests in mud device under different working condition.
Further, the groove for accommodating block 4 is provided on the inner wall of ontology 6.It closes in the bottom of set 5 and is provided with gear
Ring 9, baffle ring 9 are connected by the external screw thread of outer wall with the internal screw thread for closing 5 inner walls of set.
With reference to the accompanying drawing to the utility model it is a kind of with packing function stage cementing device the course of work into
Row description:
Firstly, the stage cementing device of the utility model is lowered into well, level-one cementing completion is filled in using flexibility
Row is for slurry, and after starching in place, into cementing device, investment opens plug, fills in 12 free-fallings to the opening plug for closing set 5 when opening
After at seat 7, to continuing to suppress in cementing device, until opening the effect of 7 compression power of obturating plug cuts the first shear pin 8 closed on set 5,
It opens plug and opens obturating plug 7 and move down, leak out the mounting hole for closing the first shear pin 8 on set 5, therefore the liquid in cementing device is logical
It crosses reservoir channel 23 to enter in the seal cavity 26 in packer, gradually be expanded by seal cavity 26 after the injection of liquid, glue
Cylinder 11 starts swollen envelope.
Then, it is persistently suppressed in cementing device, when the pressure of the seal cavity 26 in packer reaches certain
After setting value, triggering pressure activated closes valve 25 and closes reservoir channel 23, the liquid flowing in cementing device is truncated, packer is swollen
Envelope finishes, and completes the packing operation of annular space up and down of stage cementing device.
Then, to continuing to suppress in cementing device, when pressure reaches aperture setting value, control stage cementing device is cut
Second shear pin 3 of circulation port opening and closing, the second shear pin 3 is partially cut at this time, is closed obturating plug 2 and is still secured on ontology 6, closes
5 disengaging ontology 6 of set simultaneously starts to move, when the closing set circulation port 21 closed on set 5 is concordant with the bulk circulation hole 22 on ontology 6
When communicating, the cavity inside and outside cementing device is connected, and is recycled by aperture；When after circulation terminates, carried out by cementing requirements
Second level cementing job.
It is carried out using shut-off plug 13 for slurry, until after shut-off plug 13 is fallen at the closing obturating plug 2 of cementing device, shut-off plug
13 push the closing movement of obturating plug 2 to cut the second shear pin 3 again, are detached from so that closing obturating plug 2 with ontology 6, block 4 falls into shut-off plug
In 2 respective slots of seat, set 5 is closed at this time and is able to move relative to ontology 6, closes set circulation port 21 and bulk circulation hole 22
It no longer communicates, closes the bulk circulation hole 22 on ontology 6, complete whole well cementing operations.
A kind of stage cementing device with packing function of the utility model, it is simple and reasonable, easily operated, reliably
Property it is high；It is applicable to fraclional well cementing, can realize that annular space wellbore insulates in cementing operations；And it is sealed after can realizing level-one well cementation
The annular space above and below stage cementing device；Influence of the fluid column to strata pressure, effective protection stratum and wellbore are reduced, or can avoid
Formation leakage influences cementing quality when level-one is cemented the well, and can carry out second level well cementation without waiting for level-one cement slurry sets and apply
Work, effectively shortens the activity duration；Required attachment and attachment it is subsequent bore except operation it is consistent with conventional hierarchical cementing device, raising work
Have adaptability, does not generate additional particular/special requirement.
The utility model is further described by specific embodiment above, it should be understood that, have here
The description of body, should not be construed as the restriction to the spirit and scope of the utility model, and one of ordinary skilled in the art is readding
The various modifications made after reader specification to above-described embodiment belong to the range that the utility model is protected.
Claims (6)
1. a kind of stage cementing device with packing function characterized by comprising
Cementing device is arranged between casing, including sequentially connected top connection (1), ontology (6) and base tube (10)；
Packer is set in outside cementing device, including packing element (11), and packing element (11) is set in the outside of base tube (10), and and base
Manage formed between the outside wall surface of (10) can filling liquid expansion seal cavity (26), the top of seal cavity (26) passes through base tube (10)
It is connected in interior reservoir channel (23) and cementing device, opens reservoir channel to seal cavity by suppressing into cementing device
Interior filling liquid is to realize packing annular space.
2. stage cementing device according to claim 1, which is characterized in that be provided with check valve in reservoir channel (23)
(24) and pressure activated closes valve (25), and the upstream of valve (25) is closed in check valve (24) setting in pressure activated.
3. stage cementing device according to claim 1, which is characterized in that the internal sleeve of ontology (6), which is equipped with, closes set
(5), it closes on the side wall of set (5) and is provided with closing set circulation port (21)；Bulk circulation hole is provided on the side wall of ontology (6)
(22), bulk circulation hole (22) are driven to communicate with set circulation port (21) is closed with the relative movement for closing set (5) by ontology (6)
Or staggeredly.
4. stage cementing device according to claim 1, which is characterized in that the bottom for closing set (5) is provided with opening plug
Seat (7), open obturating plug (7) by the first shear pin (8) with close set (5) be fixedly connected, close cover (5) side wall on be arranged it is useful
In the mounting hole of installation the first shear pin (8), reservoir channel (23) is connected by mounting hole with cementing device inner chamber body.
5. stage cementing device according to claim 4, which is characterized in that close at the top of set (5) and be provided with shut-off plug
Seat (2) closes obturating plug (2) and is set to the inside for closing set (5), and the closings obturating plug (2), closes and cover (5) and described
Body (6) three is fixed together by the second shear pin (3), is closed on the side wall of obturating plug (2) and is provided with for installing the second shear pin
(3) mounting hole.
6. stage cementing device according to claim 1, which is characterized in that close in the bottom of set (5) and be provided with baffle ring
(9), baffle ring (9) is connected with set (5) screw thread is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821019060.8U CN208347740U (en) | 2018-06-29 | 2018-06-29 | A kind of stage cementing device with packing function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821019060.8U CN208347740U (en) | 2018-06-29 | 2018-06-29 | A kind of stage cementing device with packing function |
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| CN208347740U true CN208347740U (en) | 2019-01-08 |
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| CN201821019060.8U Active CN208347740U (en) | 2018-06-29 | 2018-06-29 | A kind of stage cementing device with packing function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108590574A (en) * | 2018-06-29 | 2018-09-28 | 中国石油化工股份有限公司 | A kind of stage cementing device with packing function |
| CN113846990A (en) * | 2020-06-28 | 2021-12-28 | 中国石油化工股份有限公司 | Stage cementing device |
-
2018
- 2018-06-29 CN CN201821019060.8U patent/CN208347740U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108590574A (en) * | 2018-06-29 | 2018-09-28 | 中国石油化工股份有限公司 | A kind of stage cementing device with packing function |
| CN113846990A (en) * | 2020-06-28 | 2021-12-28 | 中国石油化工股份有限公司 | Stage cementing device |
| US11952860B2 (en) | 2020-06-28 | 2024-04-09 | China Petroleum & Chemical Corporation | Staged cementing device and staged cementing method |
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