CN203441428U - Cement injection device for well cementation - Google Patents
Cement injection device for well cementation Download PDFInfo
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- CN203441428U CN203441428U CN201320361112.0U CN201320361112U CN203441428U CN 203441428 U CN203441428 U CN 203441428U CN 201320361112 U CN201320361112 U CN 201320361112U CN 203441428 U CN203441428 U CN 203441428U
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- cementing
- inner sleeve
- hook
- circulation port
- shell
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Abstract
The utility model relates to a cement injection device for well cementation. The cement injection device for well cementation comprises a barrel-shaped shell, wherein the peripheral wall of the shell is provided with a circulating hole capable of being opened and closed, a radial inward protrusion is arranged on the inner wall of the shell and above the circulating hole, and the inner side of the peripheral wall, below the circulating hole, of the shell is fixedly connected with a lower joint in an embedded mode. An inner sleeve is movably arranged in the shell, the axial length of the inner sleeve is less than or equal to the axial distance between the protrusion and the lower joint, an elastic jaw structure provided with an axial slot is formed on the upper portion of the inner sleeve, the lower portion of the inner sleeve is a barrel body, and therefore the inner sleeve can move from the protrusion of the shell to the area between the protrusion and the lower joint to block the circulating hole under pressure. After the cement injection device is used for well cementation, drilling operation is not needed, and construction procedures are simplified.
Description
Technical field
The utility model relates to a kind of cementing unit, more particularly relates to a kind of hook-up for cementing for cementing the well.
Background technology
At present, in oil-gas exploration and development, along with the development of oil recovery technique, deep-well, ultradeep well well cementing operation get more and more.In these deep-wells, ultradeep well cementing operation process, adopt fraclional well cementing technology can effectively solve such as once cement injection amount greatly, construction pump pressure is high, the engineering time long, easily press leakage stratum, cement paste to return less than technical problems such as design well depths.
In fraclional well cementing technology, stage cementing device is key tool.In the prior art, conventional stage cementing device is divided into mechanical opening type and two kinds of forms of hydraulic open formula conventionally.In extended reach well or high angle hole, use and to open the build the pressure stage cementing device opened of obturating plug and cannot realize and open normally putting in place of plug, and hydraulic open formula stage cementing device need to bore the inner sleeve except stage cementing device afterwards in well cementation.These problems not only can cause stage cementing device to be not closed completely, and can waste engineering time and material.
Other stage cementing devices in the prior art, also exist casing programme adaptive faculty not enough, as in horizontal well, extended reach well, if stage cementing device is positioned at Horizontal Well section or high angle hole section, the gravity plug of opening stage cementing device is difficult to automatic in-position and forms sealing, thereby cannot realize the opening operation that builds the pressure, the more difficulty of processing and assembling that makes of the complex structure of these stage cementing devices, component is larger in addition.
Utility model content
For the problems referred to above, the utility model proposes a kind of hook-up for cementing for cementing the well.After using this hook-up for cementing to cement the well, without boring except operation, simplified construction sequence.
According to the utility model, a kind of hook-up for cementing for cementing the well has been proposed, comprise tubular shell, in the circumferential side wall of housing, be provided with the circulation port that can open and close, inwall at housing, the provided upstream of circulation port is equipped with radially projection inwards, embeddedly inside the circumferential side wall in the circulation port downstream of housing be fixedly connected with lower contact, movable in housing the inner sleeve that axial length is less than or equal to the axial length between projection and lower contact is installed, the upstream portion of inner sleeve is configured with the elastic claw structure of axially cracking, downstream part is that cylindrical shell can be under pressure moves between projection and lower contact inner sleeve region from the boss of housing seals circulation port.
According to hook-up for cementing of the present utility model, thereby can open or close circulation port under action of hydraulic force, realize cementing, simple in structure, easy to operate, be applicable to straight well, high angle hole and extended reach well.
In one embodiment, the thickness of lower contact is more than or equal to the thickness of the downstream part of inner sleeve.Inner sleeve can be held securely in the end of lower contact like this, has guaranteed the reliability of construction.
In one embodiment, circulation port seals by the rupture diaphragm that can be pressed off by pressure.In a preferred embodiment, inner sleeve links together by shear pin and housing.Like this, when carrying out first order cementing job, circulation port seals by rupture diaphragm, and opens when the cementing job of the second level, has avoided first order cement to leak by circulation port.And when the cementing of the second level, shear pin is cut off to rear inner core can circulation port be closed towards downstream motion, thereby automatically complete two stage cementing construction, simple to operate.
In one embodiment, the quantity of circulation port is a plurality of and is upwards uniformly distributed in week.A plurality of equally distributed circulation ports can by injected cement paste fast, in sleeve pipe, be discharged to the annular space between sleeve pipe and the borehole wall equably, improve the speed of cementing well.
In one embodiment, between inner sleeve and the inside sidewalls of housing, be also provided with the first sealing ring.Between lower contact and the inside sidewalls of housing, be also provided with the second sealing ring.By the first sealing ring and the second sealing ring are set, guarantee to there will not be leakage in cementing with in suppressing process, improve the speed of cementing well.
In this application, the direction that term " ”,“ downstream, upstream " is defined as towards ground is upstream, and the direction on ground is downstream dorsad.
Compared with prior art, the utility model has the advantage of, in hook-up for cementing, setting is not opened the devices such as obturating plug but is formed full-bore, completes after cementing job, without boring except operation, has simplified construction sequence.In addition, hook-up for cementing of the present utility model is simple in structure, component are less and be easy to manufacture and assembling, down-hole reliability high, be applicable to straight well, high angle hole and extended reach well.
Accompanying drawing explanation
To the utility model, be described in more detail based on embodiment and with reference to accompanying drawing hereinafter.Wherein:
Fig. 1 is according to the structural representation for the hook-up for cementing of cementing the well of the present utility model;
Fig. 2 is the schematic diagram according to shut-off plug of the present utility model;
Fig. 3 is the schematic diagram being opened for the circulation port of the hook-up for cementing of cementing the well according to of the present utility model.
Fig. 4 is according to the pent schematic diagram of circulation port for the hook-up for cementing of cementing the well of the present utility model.
In the accompanying drawings, identical parts are used identical Reference numeral.Accompanying drawing is not according to actual scale.
The specific embodiment
The utility model is described in further detail will to engage accompanying drawing below.
Fig. 1 schematically shown according to of the present utility model for the hook-up for cementing 100(cementing the well, be referred to as below hook-up for cementing 100).Hook-up for cementing 100 comprises tubular shell 1 and is arranged on the inner sleeve 2 of housing 1 inside.
In the circumferential side wall of housing 1, be provided with circulation port 7, at the inwall of housing 1, the provided upstream of circulation port 7 is equipped with radially projection 3 inwards, embeddedly inside the circumferential side wall in circulation port 7 downstreams of housing 1 be fixedly connected with lower contact 11, between projection 3 and lower contact 11, just formed trench structure 13 like this.In circulation port 7, be provided with rupture diaphragm 8 so that circulation port 7 is sealed.
The upstream portion of inner sleeve 2 is configured with the elastic claw structure 12 of axially cracking, and downstream part is cylindrical shell 13, and the whole axial length of inner sleeve 2 is less than or equal to the axial length of the trench structure 13 on housing 1.Like this, inner sleeve 2 can be under pressure region from the regional movement of the projection 3 of housing 1 to trench structure 13 and seal circulation port 7.Between inner sleeve 2 and the inside sidewalls of housing 1, be also provided with the first sealing ring 4,6, between lower contact 11 and the inside sidewalls of housing 1, be also provided with the second sealing ring 10 to realize the seal request of hook-up for cementing 100.
According to Fig. 1 to 4, describe according to the use procedure of hook-up for cementing 100 of the present utility model below.
First hook-up for cementing 100 be installed on bunch tube (not shown) and be lowered into preposition in well.At this moment, circulation port 7 is broken sheet 8 and seals, and inner sleeve 2 is by shear pin 5 and housing 1 is fixed together and the region of the projection 3 of the elastic claw structure 12 of inner sleeve 2 in housing 1.Because elastic claw structure 12 is greater than the internal diameter in protruding 3 regions at the diameter under free state, so elastic claw structure 12 can be squeezed.
In bunch tube, carry out the operation of first order cement injection.After the operation of first order cement injection completes, in sleeve pipe, drop into flexible plug (not shown) replacement cement paste, after flexible plug bruising, borehole pressure increases rapidly.To pressure, reach after predetermined value, rupture diaphragm 8 is breakdown, sets up circulation canal, as shown in Figure 3 inside and outside bunch tube.
In bunch tube, carry out second level cement injection operation.After treating that second level cement injection operation completes, drop into the shut-off plug 200(of entity as shown in Figure 2), replace cement paste.The external diameter of shut-off plug 200 maximums is greater than the internal diameter of elastic claw structure 12 by compression time, but is less than the internal diameter of elastic claw structure 12 under free state.Therefore,, when shut-off plug 200 moves to hook-up for cementing 100 place downstream, shut-off plug 200 meetings engage with the elastic claw structure 12 of the end, upstream of inner sleeve 2.In bunch tube, pressurize, when pressure reaches predetermined value, shear pin 5 is cut off.Under pressure, shut-off plug 200 is communicated with inner sleeve 2 together towards downstream motion, until the downstream end of inner sleeve 2 leans the end, upstream 9 of lower contact 11 and inner sleeve 2 is fixed in trench structure 13.Because elastic claw structure 12 equals the internal diameter of trench structure 13 at the external diameter under free state, therefore elastic claw structure 12 enter trench structure 13 interior after, the elastic claw structure 12 of pressurized can open up into free state, makes shut-off plug 200 to fall into shaft bottom through hook-up for cementing 100.In this state, the downstream part of the one-tenth cylindrical shell of inner sleeve 2 seals (as shown in Figure 4) by circulation port 7, has completed cementing.Owing to not installing and not opening obturating plug in hook-up for cementing 100, and the thickness of housing 1 and inner sleeve 2 is much smaller than the internal diameter of inner sleeve 2, so the interior full-bore that substantially forms of hook-up for cementing 100, without lower drilling tool, bores and removes operation, simplified working procedure.
Although the utility model is described with reference to preferred embodiment, in the situation that not departing from scope of the present utility model, can carries out various improvement and can replace parts wherein with equivalent it.Especially, only otherwise have structural hazard, every technical characterictic of mentioning in each embodiment all can combine in any way.The utility model is not limited to disclosed specific embodiment in literary composition, but comprises all technical schemes in the scope that falls into claim.
Claims (7)
1. the hook-up for cementing for cementing the well, it is characterized in that, comprise tubular shell, in the circumferential side wall of described housing, be provided with the circulation port that can open and close, at the inwall of described housing, the provided upstream of circulation port is equipped with radially projection inwards, embeddedly inside the circumferential side wall in the circulation port downstream of described housing be fixedly connected with lower contact
Movable in described housing the inner sleeve that axial length is less than or equal to the axial length between described projection and described lower contact is installed, the upstream portion of described inner sleeve is configured with the elastic claw structure of axially cracking, and downstream part is that cylindrical shell can be under pressure moves between described projection and described lower contact described inner sleeve region from the boss of described housing seals described circulation port.
2. hook-up for cementing according to claim 1, is characterized in that, the thickness of described lower contact is more than or equal to the thickness of the downstream part of described inner sleeve.
3. hook-up for cementing according to claim 2, is characterized in that, described inner sleeve links together by shear pin and described housing.
4. hook-up for cementing according to claim 3, is characterized in that, described circulation port seals by the rupture diaphragm that can be pressed off by pressure.
5. hook-up for cementing according to claim 4, is characterized in that, the quantity of described circulation port is a plurality of and is upwards uniformly distributed in week.
6. hook-up for cementing according to claim 5, is characterized in that, between described inner sleeve and the inside sidewalls of described housing, is also provided with the first sealing ring.
7. hook-up for cementing according to claim 6, is characterized in that, between described lower contact and the inside sidewalls of described housing, is also provided with the second sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320361112.0U CN203441428U (en) | 2013-06-21 | 2013-06-21 | Cement injection device for well cementation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320361112.0U CN203441428U (en) | 2013-06-21 | 2013-06-21 | Cement injection device for well cementation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203441428U true CN203441428U (en) | 2014-02-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320361112.0U Expired - Lifetime CN203441428U (en) | 2013-06-21 | 2013-06-21 | Cement injection device for well cementation |
Country Status (1)
| Country | Link |
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| CN (1) | CN203441428U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104929572A (en) * | 2015-05-26 | 2015-09-23 | 成都高普石油工程技术有限公司 | Method for cementing wells during petroleum exploration |
| CN114427373A (en) * | 2020-09-16 | 2022-05-03 | 中国石油化工股份有限公司 | Opening plug for stage cementing device and stage cementing device |
-
2013
- 2013-06-21 CN CN201320361112.0U patent/CN203441428U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104929572A (en) * | 2015-05-26 | 2015-09-23 | 成都高普石油工程技术有限公司 | Method for cementing wells during petroleum exploration |
| CN114427373A (en) * | 2020-09-16 | 2022-05-03 | 中国石油化工股份有限公司 | Opening plug for stage cementing device and stage cementing device |
| CN114427373B (en) * | 2020-09-16 | 2024-02-09 | 中国石油化工股份有限公司 | Open plug for stage cementing device and stage cementing device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140219 |